Entries |
Document | Title | Date |
20080196505 | BODY HEIGHT MEASURING APPARATUS - A body height measuring apparatus including a measuring bar and ground mainframe. An operational control module and ultrasonic body height measuring module are provided in the measuring bar and the ground mainframe. The operational control module, the synchronous signal transmitting unit and the ultrasonic signal transmitting unit are provided in the measuring bar, wherein the synchronous signal transmitting unit and the ultrasonic signal transmitting unit are connected to the operational control module. The synchronous signal receiving unit, the ultrasonic signal receiving unit and the operation processing unit are installed in the ground mainframe. Since the apparatus comprises a measuring bar together with a ground mainframe, and the measured value of the body height is obtained by computing the difference in time when the two signals are transmitted from one side to another, the measuring error is reduced and the measuring accuracy is improved with good effects. | 08-21-2008 |
20080210011 | System and Method for Determining Properties of Tubular Cavity - A method for determining the distance of a transceiver located within a lumen from the center of the lumen and for determining the radius of the lumen, the lumen cross-section being substantially circular at the transceiver location, the method applied on data received from a transceiver placed at a position within the lumen that is distance (r) from the center and distance (a) from the lumen wall, transmitting a signal of known velocity (v) that can be correlated with the time of flight and receiving a first signal and a second signal that are reflections of the transmitted signal, timing the time differences between the transmission of the transmitted signal and reception of the first (t | 09-04-2008 |
20080216577 | TESTING OF BOTTOMHOLE SAMPLERS USING ACOUSTICS - A method for testing a hydrocarbon sample. In one embodiment, the apparatus comprises a sheath disposed about the hydrocarbon sample. The apparatus further comprises at least one set of acoustic sensors, wherein the at least one set of acoustic sensors is secured to the sheath, and further wherein at least one set of acoustic sensors produces an acoustic signal having a velocity through the hydrocarbon sample. In addition, the velocity is measured to provide information about the hydrocarbon sample. In other embodiments, the at least one set of acoustic sensors is disposed radially about the hydrocarbon sample. | 09-11-2008 |
20080236285 | Device for measuring bulk stress via insonification and method of use therefor - A device and method to nondestructively measure bulk stress in a member by employing an acoustic source, preferably an ultrasonic source, a processor, and a uniquely configured acoustic sensor package. The sensor package is configured to transmit both a longitudinal wave signal and a shear wave signal into the member. The processor is configured to capture reflections of the two impressed signals along a principal stress axis of the member and calculate the roundtrip time of the two signals. Knowing the length of the member along a principal stress axis, from the roundtrip times of the two signals, two velocities are calculated. By employing an equation that calculates bulk stress as a function of these shear and longitudinal wave velocities, a measure of bulk stress is calculated via the processor. The device measures bulk stress of a member that offers limited access in its permanent installation, such as dam reinforcements. | 10-02-2008 |
20080302187 | Vibroacoustic System for Vibration Testing - Forces are applied to a device under test and its mechanical response is measured by a laser vibrometer ( | 12-11-2008 |
20080307885 | Method and Apparatus for Precisely Measuring Wire Tension and Other Conditions, and High-Sensitivity Vibration Sensor Constructed in Accordance Therewith - A method and apparatus for monitoring a predetermined condition of a medium by; transmitting acoustical waves through the medium, continuously measuring changes in the transit time of the acoustical waves resulting from changes in the monitored condition; and utilizing the changes in transit time to provide a continuous measurement of the changes in the monitored condition. The acoustical waves are bending waves wherein cross-sections of the medium have a rotational movement orthogonally to the axis of propagation of the waves through the acoustical channel. Several examples of such method and apparatus are described, including a highly sensitive pressure sensor for sensing changes in pressure applied to a displaceable membrane, and a highly-sensitive vibration sensor for sensing earth or other vibrations. | 12-18-2008 |
20080314152 | Sensing Device - The present invention provides a sensing device for obtaining information of a test sample using an electromagnetic wave including a frequency region within a frequency region of 30 GHz to 30 THz, the sensing device comprising an electromagnetic wave transmitting portion including a plurality of transmission portions ( | 12-25-2008 |
20090007674 | APPARATUS AND METHOD FOR IMAGING SHEAR MODULUS WITHIN A BODY - An apparatus and method for imaging a shear modulus within a body is disclosed. A method for imaging a shear modulus in accordance with the present invention includes generating an elastic wave inside an object to be measured; detecting the elastic wave ongoing inside the object to be measured; calculating a shear modulus of the inside of the object to be measured, based on a value obtained by differentiating the detected elastic wave one time; and imaging the inside of the object to be measured, based on the calculated shear modulus. | 01-08-2009 |
20090007675 | DETECTING A CONDITION OF AN OPTICAL ELEMENT - A condition or detecting a change in the condition of an optical element of a laser arrangement is detected. An ultrasonic signal is coupled into an optical element such that the ultrasonic signal travels along a path within the optical element, and a transit time or a change in transit time for the ultrasonic signal to travel along the path within the optical element is detected. | 01-08-2009 |
20090007676 | ACOUSTIC DETERMINATION OF PROPERTIES OF RESERVOIRS AND OF FLUIDS CONTAINED THEREIN - The invention provides devices and methods for acoustically determining the properties of the contents of one or more reservoirs in a plurality of reservoirs. Each reservoir is adapted to contain a fluid. An acoustic radiation generator can be positioned in acoustic coupling relationship to each of the reservoirs. Acoustic radiation generated by the acoustic radiation generator is transmitted through each reservoir to an analyzer. The analyzer is capable of analyzing a characteristic of the transmitted acoustic radiation and optionally correlating the characteristic to a property of the reservoirs' contents. Properties that may be determined include volume, temperature, and composition. The invention is particularly suited to determining the properties of the contents of a plurality of reservoirs to allow for accuracy and control over the dispensing of fluids therefrom. | 01-08-2009 |
20090007677 | Ultrasonic distance measurement with high peak and low peak detection - Present invention provides an improved ultrasonic receiving unit for ultrasonic distance measurement. The ultrasonic receiving features a high peak detection unit | 01-08-2009 |
20090056453 | SHEAR MODULUS ESTIMATION BY APPLICATION OF SPATIALLY MODULATED IMPULSE ACOUSTIC RADIATION FORCE APPROXIMATION - A method for determining a shear modulus of an elastic material with a known density value is provided. In this method, a spatially modulated acoustic radiation force is used to initially generate a disturbance of known spatial frequency or wavelength. The propagation of this initial displacement as a shear wave is measured using ultrasound tracking methods. A temporal frequency is determined based on the shear wave. The shear modulus of the elastic material at the point of excitation may be calculated using the values of the spatial wavelength, material density, and temporal frequency. | 03-05-2009 |
20090064786 | QUANTITATIVE EVALUATION DEVICE AND METHOD OF ATOMIC VACANCY EXISTING IN SILICON WAFER - There is provided a quantitative evaluation device or the like of atomic vacancy existing in a silicon wafer in which the atomic vacancy concentration in the silicon wafer can be quantitatively evaluated by forming a rationalized thin-film transducer on a surface of a silicon sample without conducting an acceleration treatment for enhancing the concentration. This is characterized by comprising a magnetic force generating means | 03-12-2009 |
20090078046 | Determining Average Mechanical Properties of Constituent Particles of a Sample of Material Using Ultrasound - The average strength or Young's modulus of the constituent particles of a sample is determined from the measured speed of sound propagated from a source through the sample to a receiver. Other sample data, such as the porosity, Poisson's ratio and the pressure applied to the sample, are also used in the determination. However, no data pertaining to individual particle sizes is required. The method provides a non-destructive test for the average strengths of materials such as iron ore pellets, alumina powder, silica flour, and coal dust. | 03-26-2009 |
20090095084 | Method for determining the depth of a parking space using ultrasonic senors ad associated system - A method for determining the depth of a parking space using at least one ultrasonic vehicle sensor. According to the method, the following steps are carried out as the vehicle drives longitudinally past the parking space: a) an ultrasonic wave is emitted, b) echo signals of the emitted ultrasonic wave are collected within a measuring window, c) the dispersion is determined and/or the distribution of the echo signals within that dispersion is determined, d) a depth is defined if the dispersion range of all and/or several echo signals that form a concentration within the distribution lies below a pre-determinable threshold value. | 04-16-2009 |
20090114022 | Electromagnetic Acoustic Transducer Using Magnetic Shielding - A combined electromagnetic acoustic transducer (EMAT) is disclosed that uses magnetic shielding to increase the efficiency (defined as the received signal per unit of excitation current). In addition, electromagnetic shielding may also be used to reduce the direct coupling between the transmit and receive coils. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. | 05-07-2009 |
20090139335 | Device and Method for the Material Testing and/or Thickness Measurements of a Test Object That Contains at Least Fractions of Electrically Conductive and Ferromagnetic Material - The invention relates to a device and a method for testing the material of a test object ( | 06-04-2009 |
20090145232 | ULTRASONIC MEASURING APPARATUS AND ULTRASONIC MEASURING METHOD - An ultrasonic measuring method includes the steps of: receiving ultrasonic waves, which have been transmitted by a spread spectrum technique using mutually different codes, at first and second receivers, thereby generating first and second received signals, respectively; generating interference signals, of which the amplitudes are equal to or greater than respective threshold values, from the first and second received signals that have been despread with a code that has been used to spread any of the ultrasonic waves other than a desired one; removing the spread interference signals from the first and second received signals; calculating maximum correlation values between the first and second despread received signals for the respective threshold values; selecting one of the threshold values, at which the greatest one of the maximum correlation values has been obtained, as a threshold value for canceling interference; and calculating the propagation distance or propagation azimuth of the desired ultrasonic wave by the amount of time it has taken for the first and second received signals to arrive. | 06-11-2009 |
20090165561 | Ultrasonic Wave Propagating Method and Ultrasonic Propagating Device and Ultrasonic Testing Device Using This Method - An ultrasonic wave propagating method capable of propagating plate waves between a probe and a test piece despite variations in the thickness or the surface angle of a test piece, and an ultrasonic propagating device and an ultrasonic testing device using this method. Ultrasonic waves are propagated between a probe ( | 07-02-2009 |
20090183572 | CONNECTOR COMPONENT WITH TEMPERATURE-RESISTANT SENSOR ELEMENT - The invention relates to a connector component ( | 07-23-2009 |
20090199641 | NON-CONTACT ULTRASOUND MATERIALS SYSTEMS AND MEASUREMENT TECHNIQUES - Apparatus for determining the speed of sound through a specimen comprises an ultrasound sending transducer, an ultrasound receiving transducer, a pair of laser distance sensors, a display device, a controller in communication with the ultrasound sending transducer, the ultrasound receiving transducer and the pair of laser distance sensors and the display device. The ultrasound sending transducer and one laser distance sensor are supported with a transducer surface in a first plane. The ultrasound receiving transducer and one last distance sensor are supported with a transducer surface in a second plane parallel with the first plane. A support for a specimen is provided between the first and second planes. The controller is programmed for gathering data from the ultrasound transducers and the laser distance sensors for calculating the speed of ultrasound in the specimen and displaying the results. | 08-13-2009 |
20090217762 | METHODS FOR CONTROLLING AND MAKING PARTICLE FILTERING DEVICES - One subject of the invention is a process for checking the robustness of a particulate filter intended to be used in the exhaust line of a diesel engine, comprising the steps consisting in, having first determined the soot mass limit of said filter, loading a new filter with a level of soot at least equal to two times and at most equal to three times said soot mass limit, then making said filter undergo a severe regeneration then, in any order, determining the filtration efficiency of said filter, measuring its pressure drop and comparing it to the pressure drop of the new filter, measuring its level of cracking, and finally checking its integrity after a mechanical stress. Another subject of the invention is a method for diagnosing the robustness of a filter. | 09-03-2009 |
20090235748 | Acoustic method and system of measuring material loss from a solid structure, uses thereof and a software product - A method is described for measuring an amount of loss of material thickness from a solid structure in which acoustic waves can propagate. The structure is in operation in contact with substances susceptible to changing a thickness of the structure. A system operable to implement the method is also described. The system comprises acoustic transducers arranged in operation in contact with a surface of the solid structure. The system comprises a processing unit operable to drive one or more of the transducers to excite acoustic signals in a wall of the structure. The acoustic signals travel a distance within the structure and are received at the transducers to generate corresponding received signals for the processing unit to process and analyse. The analysis enables a degree of material loss from the structure to be computed and then optionally displayed on a display unit. The acoustic signals correspond to various modes and the processing unit ( | 09-24-2009 |
20090241672 | System and Method for Providing a Compositional Measurement of a Mixture Having Entrained Gas - A method and apparatus for determining at least one characteristic of a fluid flowing within a pipe is provided. The fluid flow may include one or more liquid component bodies and one or more gas component bodies, which bodies occupy a substantial cross-sectional area of the pipe when passing a location in the pipe. The method includes, and the apparatus includes elements operable to perform, the steps of: 1) transmitting a signal into the fluid flow at the location within the pipe, and receiving the signal after it has traversed at least a portion of the fluid flow; 2) determining a time of flight of the signal traversing the fluid flow; 3) determining the presence of a liquid component body at the location in the pipe, using the determined time of flight; and 4) determining at least one characteristic of the fluid using fluid data generated if the liquid component body is present at the location. | 10-01-2009 |
20090266165 | SELF-CALIBRATING METHOD FOR MEASURING THE DENSITY AND VELOCITY OF SOUND FROM TWO REFLECTIONS OF ULTRASOUND AT A SOLID-LIQUID INTERFACE - A method for determining a velocity and density of a fluid without requiring the transmission of ultrasound through the fluid, and a system for performing such a method. The method involves the steps of delivering, receiving and analyzing ultrasound pulses sent from a longitudinal and a shear wave transducers to a member that is in contact with a fluid. The ultrasound pulses reflecting between surfaces provide a first ultrasound pulse echo series, that is transmitted, received and processed. The shear wave ultrasound pulses are also delivered through a shear wave transducer at a predesignated angle relative to the interface of the member and the fluid and the results of this are received to obtain a second ultrasound pulse echo series. Reflection coefficients for the first and second ultrasound pulse echo series are then calculated and the density of the fluid and the velocity of sound in the fluids are extracted. | 10-29-2009 |
20090282920 | NUCLEAR REACTOR VIBRATION SURVEILLANCE SYSTEM AND ITS METHOD - A nuclear reactor vibration surveillance system has a first ultrasonic transducer for transmission, an ultrasonic transmitter, a second ultrasonic transducer for reception, an ultrasonic receiver, a signal processor, and a display unit. The first ultrasonic transducer for transmission is arranged on the outer surface of a reactor pressure vessel and is configured to convert a transmission signal into an ultrasonic pulse signal and allow the ultrasonic pulse to be transmitted to a reactor internal component. The second ultrasonic transducer for reception is arranged on the outer surface of the reactor pressure vessel and is configured to receive a reflected ultrasonic pulse reflected by the reactor internal component and convert the received reflected ultrasonic pulse into a reception signal. | 11-19-2009 |
20090314087 | ULTRASONIC TESTING OF FITTING ASSEMBLY - Apparatus and method for determining relative and/or absolute axial position of a conduit end within a fluid coupling includes application of input ultrasonic energy in the form of transient shear waves and analyzing the reflected energy. Application of the input energy collected at different radial positions about a first axial location is used with wavelet based correlation techniques to better analyze the reflected energy signals. Quality of the abutment between the conduit end and a surface associated with the coupling may also be determined as a separate or combined feature of the axial position determination. | 12-24-2009 |
20100005889 | METHOD AND ULTRASONIC SENSOR FOR DETERMINING THE HEIGHT OF OBJECTS DISPOSED ON A CONVEYING DEVICE - The present invention relates to a method for determining the height of objects disposed on a conveying device, in which an ultrasonic sensor positioned in a specific relationship to the conveying device repetitively transmits ultrasonic pulses directed toward the conveying device and any objects disposed thereon to be detected, wherein the ultrasonic pulses are then reflected from a surface of the conveying device or from surfaces of the objects to be detected and are detected by the ultrasonic sensor, wherein from the moments of transmission and moments of detection of the ultrasonic pulses, delay times of the ultrasonic pulses are determined and the height of an object surface relative to the surface of the conveying device is determined from the delay times of the ultrasonic pulses reflected from a surface of an object. The method is characterized in that the delay time of the ultrasonic pulses reflected from the surface of the conveying device is stored as a reference value, that when there is an increase in the measured delay time from a lower to a higher value, the higher value is stored and used as a new reference value, that when there is a decrease in the measured delay time from a higher to a lower value, the lower value is interpreted as the delay time value of ultrasonic pulses reflected from an object surface, and that the height of the object surface relative to the surface of the conveying device is determined from a difference between the most recently stored reference value and a delay time value relevant to an object surface. The invention also relates to an ultrasonic sensor. | 01-14-2010 |
20100005890 | METHOD OF DETERMINING PROPAGATION TIME OF ULTRASONIC FROM MOVABLE BODY AND SYSTEM THEREOF - For precisely determining a position of an electronic pen using ultrasonic, only a direct wave arriving first at a reception device is detected without being affected by a reflected wave of an ultrasonic signal to count a propagation time of the electronic pen. | 01-14-2010 |
20100018313 | METHOD AND DEVICE OF DETECTING SHAPE AND BONE STRENGTH DIAGNOSTIC DEVICE USING THE DEVICE - The disclosed device includes a module for transmitting an ultrasonic wave from a transducer to an object, another module for receiving with transducers surface waves that are a reflection of the ultrasonic wave on the object surface, another module for detecting an incoming direction of the reflected wave to each transducer group using a time difference between reception timings of two reception transducers constituting each group, each group having two transducers adjacent to each other, another module for detecting a propagation time of the surface wave reached each group using a received wave signal of the surface wave of at least one of the reception transducers, another module for detecting a reflection point of the ultrasonic wave on the object surface based on the incoming direction and the propagation time of the surface wave detected for each group, and another module for deriving a shape of the object surface using the reflection points for the transducer groups. | 01-28-2010 |
20100043556 | SYSTEMS AND METHODS FOR MEASURING THE SPECIFIC MODULUS OF CELLULAR CERAMIC BODIES | 02-25-2010 |
20100043557 | ULTRASONIC DETERMINATION OF OPTICAL ABSORPTION COEFFICIENTS - The invention relates to an examination apparatus and a method for the determination of optical coefficients, particularly of the optical absorption coefficient (μa) in an object ( | 02-25-2010 |
20100126276 | METHOD FOR DETECTING DEVIATION IN CRYSTALLOGRAPHIC ORIENTATION IN A METAL STRUCTURE - A method of detecting a deviation angle in a single-crystal metal structure is disclosed. The single-crystal metal structure has a crystallographic orientation, a length, a first side, a second side, and a first axis extending through the structure. The method comprises determining the length of the single-crystal metal structure along the first axis, transmitting a signal through the single-crystal metal structure from the first side, the signal oriented to propagate along the first axis, receiving the signal, determining a time-of-flight for the signal to traverse the length from the first side to the second side, determining a speed of the signal based on the time-of-flight and the length, and comparing the speed of the signal to a reference speed to detect the deviation angle. | 05-27-2010 |
20100170342 | Method for Rheological Characterization of a Viscoelastic Medium - Method for rheological characterization of a viscoelastic medium, comprising the following steps: (a) an excitation step during which a vibratory excitation is generated in the viscoelastic medium leading to a deformation of the medium, (b) a deformation measurement step during which the deformation of the medium caused by the excitation is observed, (c) and a characterization step during which at least one non-zero power parameter y is determined such that a rheological parameter of the medium x is equal to x (f)=a+b.f | 07-08-2010 |
20100212428 | Operation-Position Detector and Application Thereof - An operation-position detector having a tube that allows an ultrasonic signal to propagate therethrough. The tube has a plurality of holes capable of being selectively closed or opened by an operation and is provided with an ultrasonic transmitter-receiver arranged at a first end thereof. A signal processor drives the ultrasonic transmitter-receiver and causes an ultrasonic signal to propagate through the inside of the tube, receives a reflection signal corresponding to a closed or open state of each of the holes, and detects the state of each hole on the basis of the reflection signal, thereby detecting the operation position of an operation conducted by an operator. | 08-26-2010 |
20100242610 | ULTRASONIC IMAGING APPARATUS - There is provided an ultrasonic imaging apparatus capable of efficiently generating an image both by using a transmission ultrasonic wave with a wide angle of beam spread and by using a transmission ultrasonic wave with a narrow angle of beam spread. The ultrasonic imaging apparatus includes: a transmission control part controlling transmission timings of a plurality of first piezoelectric elements so as to make a synthesized wave of ultrasonic waves transmitted from the plural first piezoelectric elements match an ultrasonic wave transmitted from a predetermined virtual transmission point; a signal detecting circuit detecting an electric signal corresponding to an ultrasonic echo transmitted from the plural first piezoelectric elements, reflected by an inspection target, and received by a plurality of second piezoelectric elements; and a generating part generating an image corresponding to the inspection target based on the electric signal. | 09-30-2010 |
20100257935 | METHOD AND APPARATUS FOR MEASURING SPEED-OF-SOUND - A speed-of-sound measurement apparatus includes a wave transmission module for transmitting an ultrasonic wave to a front surface of a subject's body, a plurality of wave reception modules which each receives the ultrasonic wave from the subject's body and outputs a waveform signal corresponding to the received ultrasonic wave, a presumed propagation time calculating module for calculating a propagation time from when the ultrasonic wave is transmitted by the wave transmission module to when the ultrasonic wave arrives at each of the wave reception modules after propagating along the front surface of the subject's body or inside the subject's body, based on a presumed value of speed-of-sound in the subject's body and a front surface shape of the subject's body, a validity index value calculating module for finding a validity index value to be an index of validity of the propagation time based on the waveform signals outputted by at least two of the plurality of wave reception modules, and a speed-of-sound deriving module for finding the speed-of-sound in the subject's body based on the validity index value. | 10-14-2010 |
20100263449 | Casing Thickness Evaluation Method - Evaluating casing thickness by inducing SH0 and SH1 modes of a shear wave in the casing. The SH0 group velocity and SH1 mode group velocity (Vg) are measured and the measured SH0 mode group velocity is assigned as the tubular material shear velocity (Vs). A shear wave wavelength λ from the ratio of SH0 mode frequency (f | 10-21-2010 |
20100313663 | STRESS-WAVE SENSOR MODULE, STRESS-WAVE SENSOR, AND METHOD FOR DETECTING A VEHICLE COLLISION EVENT UTILIZING THE STRESS-WAVE SENSOR - A stress-wave sensor module, a stress-wave sensor, and a method for detecting a vehicle collision event utilizing the stress-wave sensor are provided. The stress-wave sensor has first and second support members and a diaphragm member coupled between the first and second support members. The stress-wave sensor further has first and second strain gauge sensors coupled to both the first support member and the diaphragm member. The first and second strain gauge sensors generate first and second signals, respectively, in response to the first and second strain gauge sensors detecting deflection of the diaphragm member due to stress waves propagating through the diaphragm member. | 12-16-2010 |
20100319454 | METHOD AND SYSTEM FOR DETERMINING YOUNG'S MODULUS AND POISSON'S RATIO FOR A CRYSTALLINE MATERIAL - There is disclosed a method and system for determining Young's modulus and Poisson's ratio for an electrically conductive crystalline material. In general, one or more surface acoustic waves are generated in the crystalline material and a velocity of the surface acoustic waves is recorded. One or more applied strains in the crystalline material are also recorded using X-ray diffraction. The Young's modulus and Poisson's ratio can be determined from the recorded velocity(ies) and applied strain(s). | 12-23-2010 |
20110061464 | Method and Device for Determining Ultrasonic Detecting Cycle - A method for determining an ultrasonic detecting cycle is provided. Firstly, an initial detecting cycle T is set. Then, a first sensing wave is generated. Then, a first time-of-flight value is calculated corresponding to the first sensing wave. After the first sensing wave has been generated for the initial detecting cycle T, a second sensing wave is generated. Then, a second time-of-flight value is calculated corresponding to the second sensing wave. Afterwards, the second time-of-flight value is compared with the first time-of-flight value. If a difference between the second time-of-flight value and the first time-of-flight value is smaller than a threshold value, the initial detecting cycle T is determined as the ultrasonic detecting cycle. | 03-17-2011 |
20110138919 | METHOD AND DEVICE FOR THE NON-DESTRUCTIVE ULTRASONIC TESTING OF A TEST PIECE WITH FLAT SURFACES AT AN ANGLE TO EACH OTHER - The invention relates to a method for the non-destructive ultrasonic testing of a test piece ( | 06-16-2011 |
20110179873 | APPARATUS FOR THE NON-DESTRUCTIVE TESTING OF SAMPLES USING ULTRASONIC WAVES - An apparatus provides for the non-destructive testing of samples. The samples can in this respect also be formed from critical materials which change their properties during manufacture, for example on a hardening or solidification. In an apparatus in accordance with the invention, at least one ultrasonic pressure wave transducer is arranged at a forward cell. The forward cell is filled with a liquid and is placed with an open side at one side onto a surface (A) of a conversion prism, in the form of a solid body, so that the liquid and the surface (A) are in touching contact. The conversion prism is placed with a further surface (B) onto a surface of a sample to be tested. At least one ultrasonic pressure wave transducer can be positioned or is positioned at the forward cell at at least two positions (T | 07-28-2011 |
20110226062 | METHOD AND APPARATUS FOR DETERMINING THE PRELOAD FOR SCREWS FOR DENTAL IMMPLANT SYSTEMS - A method and apparatus are provided for determining the preload in a dental implant system. The preload is determined by transmitting a sonic impulse, which is preferably an ultrasonic impulse, at a predetermined frequency to the head of the implant screw through a transducer, which may be incorporated into the head of the screw, the head of a wand which generates the sonic impulse, or the transducer and pulse-generating instrumentation may be incorporated into a torque generating instrument used to tighten the screw. The preload is determined by measuring the delay between the first and second reflections through the preloaded screw to determine a preload value and comparing that value with a pre-established baseline value for the screw, and comparing the difference with a predetermined table of values to determine the preload on the screw. | 09-22-2011 |
20120011935 | APPARATUS AND SYSTEM FOR MEASURING VELOCITY OF ULTRASOUND SIGNAL - Disclosed herein are an apparatus and a method for measuring velocity of an ultrasound signal. The apparatus for measuring velocity of an ultrasound signal according to an exemplary embodiment of the present invention includes a transmitting module transmitting ultrasound signals to targets; a receiving module receiving the ultrasound signals reflected from the targets; an image generating module using the received ultrasound signals to generate a plurality of ultrasonic images having different sound velocities; and a sound velocity determining module using the plurality of generated ultrasonic images to determine optimal sound velocity for scanning the targets. | 01-19-2012 |
20120055250 | ULTRASONIC MEASURING METHOD AND ULTRASONIC MEASURING APPARATUS - An ultrasonic measuring method includes: (A) receiving a coded spread spectrum ultrasonic signal in at least two receivers, and generating at least two received signals; (B) performing an quadrature detection on the received signals using the carrier frequency, and producing I and Q components of the received signals; (C) performing phase difference processing on the I and Q components with a coding period synchronized with that of the carrier frequency, and obtaining I′ and Q′ components from which a phase shift caused by a Doppler shift has been canceled; (D) despreading the I′ and Q′ components signals using different codes at time intervals synchronized with the carrier frequency, and obtaining despread I″ and Q″ components; (E) computing the amplitude and phase information based on the I″ and Q″ components; and (F) calculating the propagation distance and/or orientation of the ultrasonic wave based on the amplitude and phase information. | 03-08-2012 |
20120055251 | Ultrasonic Testing Method - An ultrasonic testing method is provided to measure a thickness of an object in a simple and highly accurate manner when crystal grains that form a metal solidification structure of a directionally-solidified material cast or the like have a statistical variation. | 03-08-2012 |
20120111116 | ULTRASOUND METHOD AND DEVICE FOR CHARACTERIZING AN ENVIRONMENT - A probe including N | 05-10-2012 |
20120132005 | SYSTEMS AND METHODS FOR ULTRASONICALLY EVALUATING STRUCTURAL PROPERTIES - Systems and methods for ultrasonically evaluating one or more microstructural material properties of a structural specimen are disclosed. An example system comprises an ultrasonic sensor unit including a plurality of ultrasonic transducers that generate ultrasonic backscatter within the specimen, and an evaluation module that performs an autocorrelation function on the ultrasonic backscatter data. An autocorrelation algorithm is configured to execute a single scattering response (SSR) model that computes second order grain statistics of the structural specimen. | 05-31-2012 |
20120186348 | ULTRASONIC MEASURING METHOD AND ULTRASONIC MEASURING SYSTEM - In an ultrasonic measuring method for measuring the thickness of a coating material applied by coating to one surface or both surfaces of a substrate made of a metal so as to provide a coated product, a pair of first ultrasonic sensor and second ultrasonic sensor are provided such that the first ultrasonic sensor is placed on one side of the coated product, as viewed in its thickness direction, via an air layer, while the second ultrasonic sensor is placed on the other side of the coated product, via an air layer, and the thickness of the coating material is measured by transmitting ultrasonic waves between the first and the second ultrasonic sensors. A flat-type transmitting sensor that permits propagation of unfocused ultrasonic waves is used as the first ultrasonic sensor, and a flat-type receiving sensor that permits propagation of unfocused ultrasonic waves is used as the second ultrasonic sensor. | 07-26-2012 |
20120198937 | ULTRASONIC WAVE TRANSMITTER DEVICE, ULTRASONIC WAVE PROPAGATION TIME MEASUREMENT SYSTEM AND ULTRASONIC WAVE PROPAGATION TIME MEASUREMENT METHOD - An ultrasonic wave transmitter device includes an ultrasonic wave driving circuit that modulates an ultrasonic wave based on a pseudorandom signal to generate an ultrasonic wave driving signal, and an ultrasonic wave transmitter driven by the ultrasonic wave driving signal to send out an ultrasonic wave signal of a frequency higher than a fundamental frequency of the ultrasonic wave driving signal. The ultrasonic wave transmitter includes a cylindrically-shaped piezoelectric or magnetostrictive element sending out the ultrasonic wave signal and an ultrasonic wave absorber that covers part of a base member holding the piezoelectric or magnetostrictive element. | 08-09-2012 |
20120204647 | AIRBORNE ULTRASONIC SENSOR - An airborne ultrasonic sensor is obtained in which a sensor body and a housing have an integrated structure, and which can reduce spurious waves which propagate through the housing to arrive at the sensor body. The sensor is provided with the sensor body that radiates ultrasonic waves into air and at the same time receives reflected waves from a reflection source which exists in the air, a transmission and reception device that drives the sensor body and at the same time obtains a distance to the reflection source or a propagation speed of sound based on the reflected waves, and the housing that has the sensor body fixedly secured thereto with an integrated structure. The housing has groove portions which are different in acoustic impedance from their surroundings. The groove portions are arranged obliquely regarding either one of a horizontal direction or a vertical direction of the sensor body. | 08-16-2012 |
20120272737 | METHOD FOR DETERMINING SPEED OF A SIGNAL SPECIES IN A MEDIUM AND ASSOCIATED APPARATUS - Methods and apparatus for determining the speed of a signal species, such as an acoustic signal, in a multilayered medium is described. The multilayer medium, generally, has a first and second layer (e.g. oil and water), whereby first and second signals are transmitted across particular distances in the medium such that a second distance differs from a first distance, and whereby the time of flight of each signal can be used in order to determine the speed of the signals species in one or both of the first and second layer. In other words, in some cases, the speed of sound can be determined in oil and/or water, or the like. | 11-01-2012 |
20130098157 | ULTRASONIC SENSOR - As a transmitting horn or a receiving horn attached to a transmission element or a reception element of an ultrasonic sensor, a horn enclosure with two acoustic horn bodies having a dimensional difference ΔLh of a quarter λ/4 of the wavelength λ of an ultrasonic wave U in the propagation direction X of the ultrasonic wave U or a reflection wave R is used. Then, the amplitude of a diffraction wave A | 04-25-2013 |
20130139598 | Reference Free Inconsistency Detection System - A method and apparatus for identifying an inconsistency. A number of waves that propagate through a structure are generated. A response signal is generated in response to detecting at least a portion of the number of waves that propagate through the structure. A determination is made as to whether the response signal includes a reflected component. A presence of the inconsistency in the structure is indicated when the response signal includes the reflected component. | 06-06-2013 |
20130283917 | SYSTEM AND METHOD FOR POSITION MONITORING USING ULTRASONIC SENSOR - An ultrasonic position sensing system is disclosed. In one embodiment, the system includes an ultrasonic sensor configured to monitor the position of a device. The system also includes ranging logic. The sensor is controlled by the logic to direct an ultrasonic pulse toward the device. The logic is configured to compute the transit time and the velocity of the ultrasonic pulse. Based on these parameters, the logic computes the path length between the sensor and the device, which corresponds to the location of the device relative to the location of the sensor. In further embodiments, the ultrasonic positioning system may include multiple sensors in communication with the ranging logic for monitoring multiple devices. | 10-31-2013 |
20130298681 | METHOD FOR DETERMINING THE FIBRE ORIENTATION IN A FIBRE-REINFORCED COMPONENT HAVING A NUMBER OF FIBRES DISTRIBUTED IN A LAMINATE MATERIAL - A method for determining the fibre orientation in a fibre-reinforced component having a number of fibres distributed in a laminate material is provided. The fibres are orientated in at least one defined direction. An ultrasonic signal is emitted into the component by an ultrasonic transducer. A reflected ultrasonic signal is received by an ultrasonic receiver and a measurement signal is generated. The ultrasonic transducer and the ultrasonic receiver are disposed in a defined linear relationship. Information is determined indicating a degree of the fibre orientation in relation to the defined linear relationship of the ultrasonic transducer and the ultrasonic receiver from the respective measurement signal. | 11-14-2013 |
20130312525 | METHOD AND DEVICE FOR ACOUSTICALLY SENSING AN AREA - A method for acoustically sensing an area is described. An acoustic transmit pulse is transmitted into the area by an acoustic transducer and a received signal is acquired with the aid of the transducer, in order to receive the transmit pulse reflected back from the area. Within a post-pulse oscillation time of the transducer, which directly follows the emission of the transmit pulse, the actual phase response of the received signal is determined. In the event the actual phase response deviates from a predefined setpoint phase response, an object is detected within the area. Also described is a device for acoustically sensing an area, which is designed to carry out the method. | 11-28-2013 |
20140020468 | Ultrasonic Measurement - Methods and apparatus relate to ultrasound measurement of a dimension such as the thickness ( | 01-23-2014 |
20140174187 | SYSTEM FOR MEASURING PRESSURE AND TEMPERATURE - The present invention relates to system for measuring pressure and temperature based on change in the characteristic properties of a medium for ultrasound under the effect of pressure and temperature. The invention is based on two waveguides where geometry is adapted to the medium's characteristic properties for ultrasound such that only planar pressure waves are generated in the waveguides. The first of the waveguides is arranged for measuring temperature due to thermal expansion of the medium, where the medium is pressure-compensated by means of an internal compensator to prevent thermal pressure accumulation, and where measuring temperature is based on the medium's specific known characteristic data for ultrasound under the effect of temperature under constant pressure. The second waveguide is arranged for measuring pressure, based on waveguide and the medium's known characteristic properties for thermal expansion and pressure, and where the thermal effect is corrected analytically based on measurement of temperature in the first channel. The physical principle of the invention is based on the properties of a medium (oil) where the stability for high temperature and pressure is crucial for long-term properties. Long-term properties of ultrasound sensors are not physically linked to the medium's properties, such that change in characteristic properties of ultrasound sensors does not impair the accuracy of the medium unless the function of the ultrasound sensors ceases. The physical principle of the invention allows an arrangement where ultrasound sensors can be separated from measuring channels by a pressure barrier, such that the integrity of the pressure barrier is not broken. | 06-26-2014 |
20140202249 | SENSOR POSITIONIG WITH NON-DISPERSIVE GUIDED WAVES FOR PIPELINE CORROSION MONITORING - An ultrasonic sensor assembly for testing a pipe includes a first and second transducer rings attached to the pipe and spaced apart along a length of the pipe. The first transducer ring includes a plurality of transmitters for transmitting a wave, such as a non-dispersive guided wave. The first transducer ring transmits the wave along the pipe. The second transducer ring includes a plurality of receivers for receiving the wave. A relative position of the first transducer ring with respect to a circumferential position of the second transducer ring is determined based on characteristics of the wave received by the second transducer ring. A method of positioning the ultrasonic sensor assembly on the pipe is also provided. | 07-24-2014 |
20140318251 | METHOD FOR MEASURING ELASTIC PROPERTIES USING ULTRASOUND - A method measuring elastic properties using ultrasound of a part made of a material having a curved surface, includes: emission of bundles of ultrasound waves in a direction of a point of impact on the part's surface to generate waves within the part; knowing a thickness d of the part at the point of impact in a first direction D | 10-30-2014 |
20140331771 | Ultrasonic Measurement System - Disclosed is an ultrasonic measurement system that even without additional means for temperature measurement, compensates for a change in a sound speed of an ultrasonic wave in a section whose thickness is to be measured, and assesses a wall thinning state of this section by highly accurate measurement of the thickness. | 11-13-2014 |
20140360270 | DEVICE FOR DETERMINING PROPERTIES OF A MEDIUM - A device for determining properties of a medium has a hollow body which accommodates the medium and a housing which circumferentially surrounds the hollow body. At least one portion of a wall of the hollow body is formed as waveguide for acoustic surface waves, which forms an interface to the medium. There is provided at least one transmitter for exciting acoustic waves in the waveguide and at least one receiver for receiving acoustic waves from the waveguide, which are arranged at a distance from each other, wherein the transmitter and the receiver are in direct contact with an outer surface of the waveguide and wherein the distance between transmitter and receiver is chosen such that acoustic waves excited by the transmitter can at least partly propagate on paths extending through the medium. There is provided at least one contact carrier on which the transmitter and/or the receiver are arranged. Between the waveguide and the contact carrier a continuous air gap is formed. The space between the hollow body, the contact carrier and the housing is filled with a filling mass. | 12-11-2014 |
20150033862 | METHOD FOR CHARACTERISING THE MECHANICAL BEHAVIOUR OF CEMENTS - The present invention relates to a method for determining mechanical parameters of a cementitious system, on the basis of time, and on the basis of the fineness of the cementitious system, pressure and/or temperature, representative of the in situ conditions found in wellbores. The initial composition of the cementitious system, the fineness Φ thereof and the speed of the compression waves on the basis of time V | 02-05-2015 |
20150040671 | STRUCTURAL HEALTH MONITORING SYSTEM AND METHOD - A method includes: transmitting, via a signal generator, an electrical driving signal, the electrical driving signal having a mean square error; transmitting, via a wave generating component, a Lamb wave, the Lamb wave having many different modes; estimating, via an estimating component, a propagation parameter associated with the Lamb wave; and estimating, via an estimating component, a thickness of a material. | 02-12-2015 |
20150122028 | PROPAGATION RATE MEASUREMENT DEVICE, PROPAGATION RATE MEASUREMENT PROGRAM, AND PROPAGATION RATE MEASUREMENT METHOD - A sonic speed measurement device in which reliability is enhanced while the amount of calculation is minimized is provided. A propagation path postulation component postulates the sonic speed through bone, and calculates propagation paths up until ultrasonic waves transmitted from a wave transmitter are received by oscillators. A postulated propagation time calculator calculates the propagation time it takes for the ultrasonic waves transmitted from the wave transmitter to be received by the oscillators, based on the propagation paths. A Fourier transform component subjects I signals and Q signals of signals outputted by the oscillators to Fourier transform to generate Fourier transform data. A phase shifter shifts the phase of the Fourier transform data for the oscillators in a frequency region according to the propagation time. A sonic speed derivation component determines the validity of the postulated sonic speed based on the Fourier transform data shifted by the phase shifter. | 05-07-2015 |
20150135835 | TWIN TRAWL GEOMETRY - A system for monitoring a twin trawl being towed by a vessel, the twin trawl comprising two trawl bags, two trawl doors and a clump, comprises at least one sensor arrangement for measuring distance between the doors and between one door and the clump, and a processing unit for computing geometric indicators based on the measured values. By means of the transmission of acoustic signals, the distances between the doors and the doors and the clump can be calculated and compared, and thus provide geometric indicators. | 05-21-2015 |
20150135836 | GUIDED WAVE MODE SWEEP TECHNIQUE FOR OPTIMAL MODE AND FREQUENCY EXCITATION - A method of inspecting a structure is disclosed. The method generally comprises selecting a search region of a dispersion curve of the structure corresponding to one or more inspection parameters. The search region comprises at least one guided wave mode activation point not located on the dispersion curve. The method further comprises activating, using an inspection system comprising at least one transducer, a plurality of activation points located within the search region of the dispersion curve and identifying an optimal activation point for the one or more inspection parameters. The optimal activation point comprises at least one of the plurality of activation points producing an optimal response for the one or more inspection parameters. | 05-21-2015 |
20150293062 | ULTRASONIC APPARATUS AND CONTROL METHOD FOR THE SAME - Disclosed herein are an ultrasonic apparatus for imaging an ultrasonic signal and a control method for the same. The ultrasonic apparatus may include a transducer configured to irradiate a plurality of ultrasonic waves which have different traveling directions onto an object and to collect a plurality of echo ultrasonic waves reflected from the object; and a controller configured to acquire a plurality of sound velocities of the plurality of ultrasonic waves in the object and to compound the acquired plurality of sound velocities in order to determine a composite sound velocity in the object. | 10-15-2015 |
20150300897 | SENSOR DEVICE AND RESIDUAL STRESS DETECTION SYSTEM EMPLOYING SAME - A sensor device, comprising two symmetrically disposed sonolucent wedges ( | 10-22-2015 |
20150309007 | APPARATUS AND METHOD FOR NON-DESTRUCTIVE TESTING OF CONCRETE - A device and method for determining characteristics of a concrete sample includes the use of multiple transducers at pre-determined positions with respect to each other. The transducers are coupled to the concrete surface so that they can impart and/or receive mechanical waves from the sample. Mechanical waves may be imparted to the sample by one or more transducers or by an impact hammer. A control device receives the output from receiving transducers and analyzes data there from to determine a desired characteristic of the sample. | 10-29-2015 |
20150323119 | METHOD AND SYSTEM FOR THE REMOTE DETECTION OF THE POSITION OF A PIG DEVICE INSIDE A PRESSURIZED PIPELINE - A method and a system remotely detect the position of a pig device inside a pipeline for transporting pressurised fluids, like for example long distance oil and gas pipelines having a strategic international value. The method foresees equipping the pipeline with pressure sensors in contact with the fluid, located at at least one of the two terminals of the pipeline, and the sending and processing of signals by a control unit. The operation of the system is that of identifying and locating, in real time and continuously, a pig device that moves intermittently inside the pipeline, for example during cleaning, monitoring, measurement and non-destructive control operations. | 11-12-2015 |
20150330949 | METHOD FOR CHARACTERISING A PART MADE OF A COMPOSITE MATERIAL - The invention consists in a method of characterizing a part made of composite material ( | 11-19-2015 |
20150346159 | SENSOR SYSTEM FOR CORROSION MONITORING - A permanently installed monitoring system for corrosion under insulation (PIMSCUI) and a method for performing the monitoring of said system are provided. The present invention attains the objective of the invention by a fibre optic cable permanently mounted between walls of a pipeline and pipeline insulation surrounding the pipeline and placement of acoustic emitters along the length of the pipeline in mechanical contact with the optical fibre. The acoustic emitters send a pulsed acoustic signal towards the pipeline which is received by the optical fibre, the acoustic signal subsequently travels through the pipeline wall, reflecting from the inner diameter of the pipeline before the reflected pulse is received at the optical fibre. | 12-03-2015 |
20160018364 | METHODS, SYSTEMS AND COMPUTER PROGRAM PRODUCTS FOR ESTIMATING SHEAR WAVE SPEED USING STATISTICAL INFERENCE - Methods, systems and computer program products for determining a mechanical parameter for a sample having a target region, include determining a prior probability density function that characterizes at least one physical property of the target region; generating a displacement of the sample in the target region to form a shear wave that propagates orthogonal to a direction of the displacement; transmitting tracking pulses in the target region; receiving corresponding echo signals for the tracking pulses in the target region at a plurality of lateral positions; estimating a propagation parameter of the shear wave in response to the echo signals and the prior probability density function using statistical inference; and determining at least one mechanical parameter of the target region based on the estimated propagation parameter. | 01-21-2016 |
20160054122 | METHOD FOR DETERMINING THE LAYER THICKNESS OF A CONNECTING LAYER BETWEEN TWO PACKAGING LAYERS - For a simple, fast, safe and reliable determination of the layer thickness of a bonding layer between two layers of a packaging, a laser ultrasonic method is provided, in which the transit time of the ultrasonic wave through the first and second packaging layers ( | 02-25-2016 |
20160061778 | FLUID MEASURING DEVICE - A fluid measuring device in which an ultrasonic probe provided on an outer pipeline surface transmits and receives ultrasonic waves to and from fluid in a pipeline to measure characteristics of the fluid on the basis of propagation time of the ultrasonic waves, features a wedge included in the ultrasonic probe and having an ultrasonic vibrator provided on a wedge surface. The ultrasonic vibrator may be horizontal to a surface contacting the pipeline so that ultrasonic waves enter the fluid vertically. The ultrasonic vibrator may be provided on a wedge surface inclined with respect to an axial direction of the pipeline so that ultrasonic waves enter the fluid obliquely. The fluid measuring device embodiments are capable of measuring fluid characteristics, such as the type and velocity of various fluids, easily and accurately even when it is difficult to allow an ultrasonic signal to pass through the fluid in a pipeline. | 03-03-2016 |
20160061781 | SYSTEM AND METHODS FOR DETERMINING SENSITIZATION OF ALLOY BY MEASURING AND CORRELATING ULTRASONIC PARAMETERS - The present invention relates generally to a system and methods for testing sensitization of alloy nondestructively. More specifically, the present invention relates to a system and methods for determining the sensitization of an alloy by measuring ultrasonic parameters of the alloy using ultrasonic techniques, and correlating the measured ultrasonic parameters. In certain embodiments, the ultrasonic measuring techniques include pulse-echo and resonant ultrasound spectroscopy. Certain embodiments use ultrasonic measuring techniques to measure shear-wave velocity, compressional-wave velocity, and attenuation coefficient of compressional waves. One preferred embodiment correlates measured ultrasonic parameters including shear-wave velocity, compressional-wave velocity, and attenuation coefficient of compressional waves to determine the sensitization of alloy. Advantageously, certain embodiments of the invention make it easier to collect, store, and correlate measured ultrasonic parameters through use of a computer system. | 03-03-2016 |
20160061782 | SENSOR UNIT FOR ULTRA SONIC SOUND WAVE COMMUNICATION - A sensor unit for inducing and indicating ultra sonic sound waves in at least one threaded fastener by physical contact with an end surface thereof, wherein the sensor unit includes: a support casing, a sensor element with forward contact surface for engaging the fastener end surface and movable relative to the support casing between rest and active positions, and a bias spring between the support casing and the sensor element to urge the sensor element into the rest position as the sensor element is out of contact with the fastener end surface and to bias the contact surface of the sensor element into physical contact with the fastener end surface in the active position. The support casing includes a positioning socket, engaged by the sensor element in the rest position, having a non-cylindrical and non-circular cross sectional inner shape and congruent with an outer shape of the sensor element. | 03-03-2016 |
20160069837 | OBJECT INFORMATION ACQUIRING APPARATUS - An object information acquiring apparatus includes: a matching solution that is prepared by adding, to a solvent, a solute having a higher hydrophilicity than the solvent, and propagates an acoustic wave generated from an object; a plurality of acoustic wave detection elements that receives the acoustic wave via the matching solution; a support that supports the plurality of acoustic wave detection elements so that directional axes of at least a part of the acoustic wave detection elements converge, and holds the matching solution; a position control unit that changes the positional relationship between the object and the support; and an acquisition unit that acquires characteristic information on the object based on the reception result for each positional relationship of the plurality of acoustic wave detection elements. | 03-10-2016 |
20160097744 | METHOD FOR DETERMINING ACOUSTIC VELOCITY IN A POROUS MEDIUM - At least two samples of a porous medium with different lengths are exposed to acoustic waves emitted by a source. For each sample, acoustic wave arrival times are registered at a receiver and acoustic propagation velocity in the porous medium is determined by analyzing changes in the arrival times relative to changes in the lengths of the samples. | 04-07-2016 |
20160116441 | OBJECT DETECTION APPARATUS - An object detection apparatus for detecting objects around the apparatus by transmitting a probe wave and receiving reflections from the objects. If it is determined that both first and second object positions can be calculated using a combination of first direct and indirect waves and a combination of second direct and indirect waves, respectively, and at least one of third and fourth object positions can be calculated using a combination of the second direct wave and the first indirect wave and a combination of the first direct wave and the second indirect wave, only the first object position is calculated. The second direct wave is received at a first location after receipt of the first direct wave at the first location. The second indirect wave is received at a second location away from the first location after receipt of the first indirect wave at the second location. | 04-28-2016 |
20160131520 | Fiber Optic Distributed Vibration Sensing With Directional Sensitivity - Methods for determining separate velocity components of an acoustic wavefield that are incident on a distributed fiber optic sensor are disclosed. A fiber optic sensor includes fiber that is spatially distributed in non-parallel planes of a three-dimensional volume having three orthogonal axes. The fiber includes a first fiber pattern that is spatially distributed within a first plane of the three-dimensional volume, and a second fiber pattern that is spatially distributed within a second plane of the volume. The fiber patterns are interrogated separately by a distributed fiber optic interrogation system. The individual responses from each pattern are combined and processed to determine separate velocity components of the acoustic wavefield relative to the orthogonal axes of the three-dimensional volume. | 05-12-2016 |
20220136825 | COMPOSITE PARTS THAT FACILITATE ULTRASONIC IMAGING OF LAYER BOUNDARIES - Systems and methods are provided for ultrasonic imaging of composite parts. One embodiment is a method that includes providing an object having multiple layers of fibers and resin, inducing ultrasonic waves at locations along the object, and attenuating the ultrasonic waves at the regions due to regions interspersed among the layers that each exhibit an elastic modulus distinct from an elastic modulus of the fibers and distinct from an elastic modulus of the matrix. The method further includes receiving the attenuated ultrasonic waves, and analyzing the attenuated ultrasonic waves to determine depths of the regions. | 05-05-2022 |