Class / Patent application number | Description | Number of patent applications / Date published |
324639000 | Where energy is transmitted through a test substance | 43 |
20080303534 | Method and Apparatus For Measuring the Water Conductivity and Water Volume Fraction of a Multiphase Mixture Containing Water - A method for determining the water conductivity and water volume fraction of a multi-component mixture of water and at least one additional liquid or gas in a pipe, the method comprising the following steps: a. electromagnetic phase measurements at least two measurement frequencies are performed between two receiving antennas located at different distances from a sending antenna, b. based on empirically determined constant(s) and the above measurements, the real and imaginary dielectric constants are determined, c. the temperature and pressure are determined d. based on the knowledge of the real and imaginary dielectric constants of the components of the fluid mixture and the result from the above steps a-c, the conductivity of the water and/or the volume fraction of water are determined. An apparatus for performing the method is also disclosed. | 12-11-2008 |
20090009190 | Inspection Apparatus Using Terahertz Wave - There is provided an inspection apparatus having a configuration which can suppress attenuation of an electromagnetic wave caused by an environment surrounding the inspection apparatus and can readily prevent an unwanted substance from being contaminated into a propagation path of the electromagnetic wave. | 01-08-2009 |
20090009191 | High-Resolution, Nondestructive Imaging of Dielectric Materials - The enhanced detection of defects in the bulk dielectric material (Specimen) having radiation partly reflected at interfaces where the dielectric constant changes (e.g., where there are defects or structures). A sinusoidal or quasisinusoidal wave (Microwave Source) results. Localization or imaging of features is enhanced by exploiting the variation in distance resolution (Standoff+/−) in a sinusoidal or quasi-sinusoidal standing wave. At characteristic distances, the wave has a high slope and the amplitude of the wave varies strongly with small changes in distance (Standoff+/−). By inspecting at these characteristic distances (Standoff+/−), the resolution is enhanced. By systematically varying the position of the transducer or specimen, detailed images may be formed of the internal structure of the specimen across a range of depths. Defects and structures may be detected at smaller sizes than has previously been possible. | 01-08-2009 |
20090153147 | INTRUSION DETECTION SYSTEM - An intrusion detection system includes an intrusion detection device, and a pair of leaky transmission paths including a leaky transmission path of a sending side which is connected to the intrusion detection device and outputs a leaky electric wave on the basis of an output from the intrusion detection device and a leaky transmission path of a receiving side which receives the leaky electric wave output from the leaky transmission path of the sending side, and the intrusion detection device detects that the leaky electric wave received in the leaky transmission path of the receiving side varies to detect the presence or absence of intrusion and an intrusion point. | 06-18-2009 |
20090153148 | SENSOR AND METHOD FOR DETECTING A SUBSTANCE - A sensor for detecting a substance in a physical space, having an RF energy emitter fed by a signal source on one side of the space and an RF energy receiving element coupled to a detector at an opposite side of the channel, spaced apart by a distance (r) selected so that when the signal wavelength (λ) changes based on the value of the dielectric constant (ε) of the particular substance in the physical space between the emitter and receiver, the mode of field type within the sensor channel changes between near field and intermediate or far field mode. | 06-18-2009 |
20090195259 | Microwave Probe Device - A probe for obtaining a measure of one or more properties in a sample wherein the probe comprises a support member ( | 08-06-2009 |
20090322349 | APPARATUS AND METHOD FOR DETECTING A DISCONTINUITY WITHIN A NON-BIOLOGICAL ELEMENT LOCATED WITHIN A BIOLOGICAL STRUCTURE - Apparatus for detecting a discontinuity within a non-biological element located within a biological structure, the apparatus comprising: a microwave energy source; a first antenna coupled to the microwave energy source and arranged to transmit the microwave energy into the biological structure; a second antenna arranged to receive at least a portion of the transmitted microwave energy; an antenna carrier arranged to have the first and second antenna affixed thereon and including means for moving the first and second antenna with respect to the biological structure; and a signal processing unit coupled to the second antenna arranged to determine the phase and/or magnitude response of the received microwave energy as a function of the position of the antennas with respect to the biological structure and provide an indication of the location of the discontinuity within the non-biological element according to the phase and/or magnitude response. | 12-31-2009 |
20100001743 | Apparatus and method to distinguish nominally identical objects through wave fingerprintsApparatus and method to distinguish nominally identical objects through wave fingerprints - The present invention exploits extreme sensitivity to initial conditions in ray-chaotic enclosures to create a method to distinguish nominally identical objects through their unique “wave fingerprints.” The fingerprint can be measured through transmission of a pulsed microwave signal as a function of carrier frequency and time. When internal components are re-arranged, the Electromagnetic Fingerprints (EMF) changes in significant ways. The EMF can be detected by direct injection measurements of the enclosure or through remote measurement. | 01-07-2010 |
20100033194 | PLASMA SYSTEM AND MEASUREMENT METHOD - A plasma system ( | 02-11-2010 |
20100102828 | SYSTEM AND METHOD FOR MEASURING RETENTATE IN FILTERS - A system and method for determining loading of a filter having a first dielectric constant with a material having a different dielectric constant, is disclosed. The filter is contained within a metallic container forming a microwave cavity, and microwave or RF energy is created within the cavity and changes in the cavity microwave response are monitored. The changes in cavity microwave response are related to filter loading. In a preferred embodiment, the microwave energy includes multiple cavity modes thereby allowing determination of spatial distribution of the contaminant material loading. In one embodiment, the microwave cavity response includes a shift in frequency of a resonant mode. Alternatively, the microwave cavity response includes a shift in quality factor Q of a resonant mode. The microwave cavity response may include a shift in amplitude or peak width of the microwave's signal at resonance. | 04-29-2010 |
20100244856 | OBSTACLE DETECTING SYSTEM AND OBSTACLE DETECTING DEVICE - An obstacle detecting system having leakage coaxial cables laid on at both the sides of an obstacle monitoring district and an obstacle detecting device for emitting electrical waves from one of the leakage coaxial cables laid on at both the sides to the other leakage coaxial cable and detecting an obstacle in the obstacle monitoring district on the basis of the electrical waves incident to the other leakage coaxial cable is further equipped with an electrical wave transmitting unit for transmitting the electrical waves to the one leakage coaxial cable in the obstacle detecting device, an electrical wave receiving unit for receiving the electrical waves incident to the other leakage coaxial cable, and a connecting unit for connecting the electrical wave transmitting unit and the electrical wave receiving unit. | 09-30-2010 |
20100327880 | PULSED WAVEGUIDE SENSING DEVICE AND METHOD FOR MEASURING A PARAMETER - At least one embodiment is directed to a sensor for measuring a parameter. A signal path of the system comprises an amplifier ( | 12-30-2010 |
20110025347 | Guided wave cutoff spectroscopy using a cylindrical measurement cell - A cylindrical waveguide ( | 02-03-2011 |
20110109324 | Microwave system for detecting bubbles - The microwave embolus detector is a device that employs microwaves to detect the presence of air emboli in a flow of paste, which is passed through a Teflon tube or hose, as these microwaves are absorbed to a greater or lesser degree by the paste itself but are not absorbed by air. The level of power received by the receiver is constant provided the flow is homogenous. However, when a bubble appears, diffusion takes place as air does not absorb the microwaves, thus the power received will alter as regards the full scale signal of the homogenous flow. Diffusion may also be caused by the presence of lumps. | 05-12-2011 |
20120007607 | SENSING SYSTEM AND METHOD - A sensing system comprises a material having a matrix structure in which a plurality of sensing elements are embedded, the sensing elements having electron distribution and/or transport properties that change in response to a change in a physical or chemical property of the material. The sensing system further comprises a receiver, including an antenna, the receiver arranged to receive a source RF signal and a returned RF signal, the returned RF signal being received from the material. A change in the electron distribution and/or transport properties of the sensing elements cause the source RF signal to change, such that a change in a property of the material can be determined from the returned RF signal. A corresponding method of sensing a change in a property of a material is also provided. | 01-12-2012 |
20120074958 | DEVICE AND METHOD FOR PROCESSING AND MEASURING PROPERTIES OF A MOVING ROD OF MATERIAL - Device for processing and measuring properties of a moving rod of material of the tobacco processing industry includes a microwave resonator structured and arranged so that the rod of material is conveyable through the microwave resonator. Includes microwave generator with output frequency f | 03-29-2012 |
20120126831 | Sensor Assembly And Microwave Emitter For Use In A Sensor Assembly - A microwave emitter for use in a microwave sensor assembly that includes an emitter body includes a first arm that extends radially outward from the emitter body. The first arm is at least partially non-linear and includes at least one peak and at least one trough. The microwave emitter also includes a second arm that extends radially outward from the emitter body. The second arm includes at least one peak and at least one trough. The first arm and the second arm generate an electromagnetic field when at least one microwave signal is received. | 05-24-2012 |
20120262190 | Method and Apparatus for Measuring Characteristics of Object - A measuring method for measuring characteristics of an object to be measured, the measuring method including holding the object on a void-arranged structure having at least two void portions that pass therethrough in a direction perpendicular to a principal surface thereof, and applying electromagnetic waves to the void-arranged structure on which the object is held to detect frequency characteristics of the electromagnetic waves transmitted through the void-arranged structure. The void-arranged structure has a grid structure in which the void portions are periodically arranged in at least one direction on the principal surface of the void-arranged structure. The characteristics of the object are measured on the basis of a relationship between a first frequency characteristic and a second frequency characteristic. | 10-18-2012 |
20120319702 | GUIDED WAVE CUTOFF SPECTROSCOPY USING A CYLINDRICAL MEASUREMENT CELL - A cylindrical waveguide ( | 12-20-2012 |
20130027059 | Microwave reference block assembly - A test waveguide ( | 01-31-2013 |
20130063159 | WAVEGUIDE, METHOD OF MANUFACTURING THE SAME, AND ELECTROMAGNETIC WAVE ANALYSIS APPARATUS - Provided is a waveguide for guiding an electromagnetic wave between a first conductor layer and a second conductor layer each having a negative dielectric constant real part for the electromagnetic wave, the waveguide including a tapered structure in a part of the waveguide at which the electromagnetic wave exits or enters, in which a spatial profile of the tapered structure perpendicular to an optical axis extends to both sides with respect to the optical axis at least in one direction orthogonal to the optical axis as being closer to an opening plane at an outermost part of the tapered structure. | 03-14-2013 |
20130127478 | System And Method For Measuring Retentate In Filters - A system and method for determining loading of a filter having a first dielectric constant with a material having a different dielectric constant, is disclosed. The filter is contained within a metallic container forming a microwave cavity, and microwave or RF energy is created within the cavity and changes in the cavity microwave response are monitored. The changes in cavity microwave response are related to filter loading. In a preferred embodiment, the microwave energy includes multiple cavity modes thereby allowing determination of spatial distribution of the contaminant material loading. In one embodiment, the microwave cavity response includes a shift in frequency of a resonant mode. Alternatively, the microwave cavity response includes a shift in quality factor Q of a resonant mode. The microwave cavity response may include a shift in amplitude or peak width of the microwave's signal at resonance. | 05-23-2013 |
20130147493 | SYSTEM AND METHOD FOR DETERMINING A CONCENTRATION OF GAS IN A CONFINED SPACE - A system for determining a concentration of gas in a confined space includes a first frequency generator for generating a first RF signal. A first antenna transmits the first RF signal across the confined space and second antenna receives the first RF signal. First and second RF signal power detectors detect the power of the first RF signal both prior to and after transmission through the confined space. A first comparator circuit determines a concentration of oxygen in the confined space based on the power of the first RF signal prior to transmission through the confined space and the power of the first RF signal received by the second antenna. | 06-13-2013 |
20140347074 | LOCKING SYSTEM FOR DETECTING AND TRACKING THE CENTER FREQUENCY OF ABSORPTION LINES IN GASES - A method to detect a gas absorption line that includes alternately transmitting and sweeping two radio frequency (RF) signals through an absorption cell, wherein the two RF signals are transmitted at different frequencies separated by a range and are swept across a span of frequencies in a microwave and millimeter wave regions of a frequency spectrum. Receiving the RF signals by a receiver and analyzing the received signals by a closed loop system for relative absorption by a gas due to an absorption line of the gas in the span of the swept frequencies. Detecting the absorption line of the gas when the two RF signals straddle the gas absorption line and the relative absorption by the two RF signals is equal. | 11-27-2014 |
20150084645 | INSPECTION APPARATUS AND INSPECTION SYSTEM - An inspection apparatus of an embodiment includes a transmitting antenna device connected to a transmitting unit including a transmitting device configured to transmit a microwave, and a receiving antenna device connected to a receiving unit including a receiving device. Each of the transmitting antenna device and the receiving antenna device faces a subject to be inspected. The receiving antenna device receives at least one of a microwave transmitted from the transmitting antenna device and penetrating the subject to be inspected, a microwave of which phase has been delayed, and a microwave diffracted in the subject to be inspected. The receiving unit is a directional antenna. | 03-26-2015 |
20150091585 | DEVICE FOR MEASURING THE DIELECTRIC AND/OR MAGNETIC PROPERTIES OF A SAMPLE BY MEANS OF A MICROWAVE TRANSMISSION MEASUREMENT - A device for measuring the dielectric and/or magnetic properties of a sample by means of a microwave transmission measurement, comprising a transmitting antenna and a receiving antenna that define a transmission measuring section in which the sample to be measured can be positioned, at least one transmission-side synthesizer for generating a high-frequency signal with a frequency between 800 MHz and 30 GHz, a frequency standard that is connected via a transmission-side low-frequency synchronization signal line to the transmission-side synthesizer and to which the transmission-side synthesizer is coupled phase-locked reproducible, as well as an evaluation unit which is connected at least indirectly to the transmission-side synthesizer and the receiving antenna. At least one receiving-side synthesizer is provided which is connected to the frequency standard via a receiving-side low-frequency synchronization signal line and is coupled phase-locked reproducible thereto and is furthermore connected at least indirectly to the evaluation unit. | 04-02-2015 |
20150323472 | METHOD OF PROVIDING SPECIFIC ABSORPTION RATE (SAR), AND USER TERMINAL - Provided is a specific absorption rate (SAR) provision method and a user terminal, the method including receiving a radio signal related to a radio service, determining a use pattern of a user sensed by a user terminal in response to the receiving, extracting a standard SAR for a body part of the user based on the determined use pattern, and determining a measured SAR for the body part of the user based on the extracted standard SAR and a transmission power of the user terminal. | 11-12-2015 |
20150355110 | Radio Frequency State Variable Measurement System And Method - A measurement system and method of conducting cavity resonance and waveguide measurements is disclosed. The cavity or waveguide may be used to monitor the amount, composition, or distribution of a material or sample contained in the cavity or waveguide or passing through the cavity or waveguide. Improved means for operating the measurement system to reduce measurement variability, improve measurement accuracy, and decrease measurement response times are described. The invention's broad applications range from measurements of filters, catalysts, pipe, and ducts where the material collected in or passing through the cavity or waveguide exhibits dielectric properties different from the material which it displaces. | 12-10-2015 |
20150362439 | DEVICE AND METHOD FOR EVALUATION OF A MATERIAL - Disclosed is an improved device and method to evaluate the status of a material by scanning an area that overlaps a region of the material under evaluation. The device and method are operative to identify a leakage of a first material into a second material, such as a molten material surrounded by a refractory material, to measure the thickness of the second material, using electromagnetic waves, and to generate images. The device is designed to reduce a plurality of reflections associated with the propagation of electromagnetic waves launched into the material under evaluation, by a sufficient extent so as to enable detection of electromagnetic waves of interest reflected from remote discontinuities present in between the device and the enclosed material. Furthermore, the device can be configured to scan areas of interest in either a portable or fixed configuration, manually in a standalone mode or as part of an automated system. | 12-17-2015 |
20150379867 | WIRELESS COMMUNICATION SYSTEM - There is provided a wireless communication system for a marine propulsor, comprising: a transmitter; a receiver; and a waveguide, arranged to convey an electromagnetic data signal between the transmitter and the receiver; wherein the waveguide comprises an electrically non-conductive solid or liquid medium for propagating the electromagnetic data signal. | 12-31-2015 |
20160033435 | METHOD OF MEASURING BIOLOGICAL SAMPLE PROPERTIES AND BIOLOGICAL SAMPLE PROPERTY MEASURING APPARATUS - A method of measuring biological sample properties and a biological sample property measuring apparatus is provided. A method of measuring biological sample properties includes disposing a biomaterial to contact a sensing unit, detecting a radio frequency (RF) signal flowing through the sensing unit, and obtaining an RF property indicator of the biomaterial based on the detected RF signal. | 02-04-2016 |
20160161434 | RADIO FREQUENCY IDENTIFICATION (RFID) DEVICES FOR DETECTING VOLATILE SUBSTANCES - A radio frequency identification device, for detecting at least one volatile substance, comprising an integrated circuit, an antenna electrically connected to said integrated circuit, and at least one conductor, between said integrated circuit and said antenna, preferably said at least one conductor comprises a conducting composite, preferably said conducting composite comprises a polymer matrix and a conductor. | 06-09-2016 |
20190145922 | FUEL QUALITY SENSOR | 05-16-2019 |
324640000 | To determine water content | 9 |
20100066386 | SYSTEM FOR DETECTING, QUANTIFYING AND/OR LOCATING WATER IN AIRCRAFT SANDWICH STRUCTURES AND METHODS FOR USING THIS SYSTEM - A system for the detection of water in a sandwich structure for aircraft including: a microwave generator, at least two microwaves emitters/sensors mounted in the structure, and a microwave detector capable of detecting the microwaves after propagation in the structure; a data-processing unit associated with a library containing at least one model of the structure when empty. Also methods for implementing this system as well as an aircraft including such a system. | 03-18-2010 |
20100176818 | Apparatus and method for the measurement of mass and density and/or for the measurement of the humidity of portioned units - Method and apparatus for the measurement of mass or density and/or for the measurement of the humidity in a plurality of portioned units in a non-metallic carrier material, which provides the following: a microwave measuring instrument, consisting of at least one microwave resonator for generating at least one resonance mode in a spatially limited measurement area and an analysing unit for analysing at least one variable of the at least one resonance mode, a conveying device for the carrier material, which transports the carrier material with the portioned units through the measurement area, the microwave measuring instrument measures at least one variable of the at least one resonance mode at a time when only the carrier material without portioned unit is in the measurement area, and at a time when the portioned unit is at least partially in the measurement area, the analysing unit subtracts the variable measured for the carrier material from the measurement values for the portioned unit, and determines a value of the humidity and/or of the mass or density of the portioned unit from at least one difference by way of an input-output map. | 07-15-2010 |
20100295556 | Method and Device for Humidity and/or Density Measurement - The invention relates to a method for humidity and/or density measurement in a sample material, using a microwave transmitter, a microwave receiver and an analytical unit which can determine the phase and amplitude of microwave radiation from the microwave transmitter received by the microwave receiver and n which a complex transmission function for the measuring arrangement can be stored. Said method comprises the following steps: the phase and amplitude are determined for a number of frequencies of the microwave radiation transmitted through the sample material, using the complex transmission function for the measuring arrangement the complex transmission function sample material is calculated from the determined values and transformed into the time domain as a complex time domain function, the maximum value of the main pulse is determined as parameter A from the time domain function, the width of the main pulse is calculated as parameter B from the time domain function and/or the amplitude value for the main pulse is determined as parameter H and a humidity and/or density of the sample material is determined based on the parameter A and the parameter B and/or H. | 11-25-2010 |
20110006785 | ANALYZING METHOD USING A PROCESSING STRUCTURE AS A PROBE - The invention relates to a method of analyzing a material contained inside a process vessel. An electromagnetic signal is applied to an elongated processing structure inside the vessel. The propagated electromagnetic signal is detected and information about dielectric properties of the material is extracted based on the detected signal. The invention also relates to a device comprising an elongated processing structure and a use of a processing structure. | 01-13-2011 |
20120025848 | Device for Transmitting and/or Receiving Electromagnetic RF Signals, and Measurement Instrument and Machine-Tool Monitoring Device with such a Device - A device for transmitting and/or receiving electromagnetic RF signals, in particular a UWB antenna, has a planar, ultra-wideband antenna structure made of a plurality of dipole elements. Each dipole element comprises two poles having substantially elliptical base shapes. A measuring machine, in particular a locating and/or material identifying device for identifying objects encased in a medium and/or for identifying material parameters, in particular the moisture of a material, has at least one UWB sensor comprising at least one device for transmitting electromagnetic RF signals. A machine tool monitoring device has a detecting device for detecting the presence of a material type, in particular of tissue, in a machine tool working area, and has a working mechanism wherein the detecting device comprises a sensor unit having at least one device for transmitting electromagnetic RF signals. | 02-02-2012 |
20120092024 | DETERMINATION OF WATER CUT AND SALINITY USING A COINCIDENCE FUNCTION - A salinity determining system for determining a salinity of water in a hydrocarbon emulsion of oil and water. The salinity determining system comprises an antenna element in contact with the hydrocarbon emulsion and a switch coupled to the antenna element. The salinity determining system comprises a first analyzer device configured to be coupled to the antenna element via the switch. The first analyzer device is associated with a first coincidence function based on first measured electrical parameters of transmitted radio-frequency (RF) energy. The salinity determining system also comprises a second analyzer device configured to be coupled to the antenna element via the switch. | 04-19-2012 |
20140218049 | APPARATUS FOR MEASURING MOISTURE CONTENT AMOUNT AND/OR COATING AMOUNT OF COATING LAYER OF SHEET-SHAPED BASE MATERIAL - A first isolator, which is disposed in a direction where a signal is transmitted only to an antenna direction, is connected directly to a connector portion of an antenna on an oscillation side without a cable, and a second isolator | 08-07-2014 |
20150022220 | Multi-frequency Microwave Sensor for Temperature Independent Measurement of Moisture - Microwave techniques for measuring moisture and other properties of paper and related products without requiring an independent measurement of temperature are provided. A sensor directly measures the reflection or transmission of microwaves at a number of well-chosen frequencies so as to characterize the absorption spectrum of the product. The technique of measuring the parameters of a composition includes: (a) directing incident microwave radiation over a spectrum of wavelengths from an antenna upon the composition; (b) measuring the microwave radiation over the spectrum of wavelengths that emerges from the composition; (c) determining the reflected and/or transmitted transfer function; and (d) relating the transfer function of the composition to the parameters of the composition by applying a theoretic, calibrated, or hybrid model. The product moisture and temperature are extracted from the transfer function. | 01-22-2015 |
20160187266 | SYSTEM AND METHOD FOR MEASUREMENT OF MATERIAL PROPERTY USING VARIABLE REFLECTOR - A system and method for measuring a material includes at least one transmitter for transmitting a first signal and a second signal. A variable reflector reflects a portion of the first signal at a first reflecting property to produce a first reflected signal, the portion of the first signal having traveled through the material. The variable reflector also reflects a portion of the second signal at a second reflecting property to produce a second reflected signal, the portion of the second signal having traveled through the material. A receiver receives the first received signal and the second received signal, the first received signal includes the first reflected signal having traveled through the material and the second received signal includes the second reflected signal having traveled through the material. The first reflected signal and the second reflected signal providing an indication of at least one property of the material. The at least one property includes permittivity, attenuation, anisotropy, and frequency dependency of the material. | 06-30-2016 |
324641000 | To determine insertion loss | 1 |
20150293039 | Material Detection and Analysis Using a Dielectric Waveguide - A dielectric waveguide (DWG) may be used to identify a composition of a material that is in contact with the DWG. A radio frequency (RF) signal is transmitted into a dielectric waveguide located in contact with the material. The RF signal is received after it passes through the DWG. An insertion loss of the DWG is determined. The presence of the material may be inferred when the insertion loss exceeds a threshold value. The composition of the material may be inferred based on a correlation with the insertion loss. Alternatively, a volume of the material may be inferred based on a correlation with the insertion loss. | 10-15-2015 |