Class / Patent application number | Description | Number of patent applications / Date published |
702159000 | By reflected signal (e.g., ultrasonic, light, laser) | 50 |
20080228440 | Non-Contact Deviation Measurement System - A non-contacting deviation measurement system projects a first line and a second line upon a surface of an object. The projections of the first line and second line are arranged to overlap at an intersection line oriented at a nominal location such that when the surface is oriented at the nominal location, the intersection line appears on the surface. As the location of the surface deviates from the nominal location, the first line and second line as projected upon the surface move away from one another. The distance between the lines may be used to calculate the deviation from the nominal location. The deviation calculated may be compared to a predetermined maximum allowable deviation. | 09-18-2008 |
20080243429 | THREE-DIMENSIONAL POSITION-MEASURING APPARATUS - A three-dimensional position-measuring apparatus comprises a body, a rotational optical portion rotatable with respect to the body in a horizontal direction and comprising a reflective plate in which deflection in a vertical direction is controllable, a first data transmitting and receiving portion arranged in the body and comprising a first coil which has a rotational axis of the rotational optical portion as an axis, and a second data transmitting and receiving portion arranged in the rotational optical portion and comprising a second coil that has the same axis as that of the first coil and magnetically couples with the first coil. | 10-02-2008 |
20080243430 | Multi-Targeting Method For Measuring Distance According to the Phase Measuring Principle - Distances to targets ( | 10-02-2008 |
20080255799 | Determination of the Gap Size of a Radial Gap - The invention relates to a method for determining the size of a radial gap between rotating and torsion-proof parts, particularly the parts of a turbomachine. According to said method, an original signal emitted by a transmitter device located on the surface of the rotating part is received in a modified manner by a receiver device disposed on the torsion-proof part and is redirected to an evaluation unit. Said evaluation device determines and displays the size of the radial gap from the received signal by determining the parameters of the trajectory of the rotating transmitter device. | 10-16-2008 |
20090018796 | Project Calculator with Integral Distance Measurement Sensor - A project calculator, including a housing, a circuit board mounted within the housing and including a processor, an input device connected to the circuit board and interfacing with the processor, an output device connected to the circuit board and interfacing with the processor, and a distance sensor rotatably mounted to the housing and interfacing with the processor. A laser assembly is may also be rotatably mounted to the housing and configured to provide a visual indicator to an object to which the distance sensor is pointing. One or more level indicators may also be mounted to the housing. | 01-15-2009 |
20090055123 | DISTANCE BASED ASSOCIATION FOR ULTRA WIDE BAND (UWB) WIRELESS PERSONAL AREA NETWORK (PAN) DEVICES - Methods and wireless communication device for associating UWB (Ultra Wide Band) WPAN devices through the processing of ranging information. Ranging information represents the distance between a device and another device. Devices can automatically determine whether association has occurred via evaluation of, e.g., changes in distance, velocity and/or acceleration of devices, optionally in conjunction with a user-gated technique. The association between two wireless devices is carried out automatically when the distance between them is below a certain threshold. In a different embodiment, said distance information is used together with user-gated information to take a decision on associate or not associate two devices close to each other. Said user-gated information may be a confirmation given by the user to associate, e.g. through a button, etc. | 02-26-2009 |
20090204364 | SYSTEMS AND METHODS FOR ESTIMATING DISTANCES USING MULTI-RESOLUTION FUNCTIONS - Systems and methods for estimating the distance between a start point and a true endpoint in which at least two functions of differing resolutions are used. The method includes measuring a coarse distance between the start point and an intermediate point using the lower resolution function, the intermediate point comprising a point which is substantially within one unit of the higher resolution function away from the true endpoint. Next, a vernier distance is measured from the intermediate point to a vernier endpoint using the higher resolution function, the vernier endpoint being within a narrow, vernier error window of the true endpoint. Subsequently, the coarse and vernier distances are summed to obtain the estimated distance. | 08-13-2009 |
20090259434 | Monitoring motion of a crusher - A method of measuring one or more motion parameters of a main shaft in a gyratory or cone crusher is disclosed. Signals are directed from a stationary sensor means located apart from the main shaft to one or more signal reflective surfaces situated on a target located on or adjacent to an upper portion of the main shaft. The target rotates and otherwise moves in unison with the movement of the main shaft. From the elapsed time the distances from the sensor the reflective surfaces on the target are determined. Analyzing the distances over time will yield information on the movement of the main shaft. | 10-15-2009 |
20090287453 | Light Scanning Photoelectric Switch - This invention provides a light scanning photoelectric switch with which various settings of the light scanning photoelectric switch such as setting of a protection area can be easily set. The light scanning photoelectric switch includes: a display unit having a display screen that displays information including at least one of a status of a safety function of the light scanning photoelectric switch, and information of a failure status; and an operating unit provided in vicinity of the display unit, and for switching the information displayed in the display screen to different one of the safety signal, the result of the determination, setting contents of the light scanning photoelectric switch, the status of the safety function of the light scanning photoelectric switch, and the information of the failure status. | 11-19-2009 |
20100023298 | Device for determining the distance between a rotor blade and a wall of a turbine engine surrounding the rotor blade - A device for determining distance between a rotor blade and a wall of a gas turbine surrounding the rotor blade is provided. A waveguide guides and emits electromagnetic waves in the direction of the rotor blade through a waveguide opening facing the rotor blade. The electromagnetic waves are injected into the waveguide and reflected portions of the electromagnetic waves are received. An evaluation unit compares the phase of the electromagnetic waves to be injected with the phase of the reflected portions of the electromagnetic waves and determines phase comparison values for every frequency and the distance is determined based on the phase comparison values. The waveguide includes two waveguide segments made from different materials having temperature stability and damping capacity increasing in the direction from the segment connected to the unit for injecting the waves to the segment having the waveguide opening. | 01-28-2010 |
20100030515 | OPTICAL INSTRUMENT AND METHOD FOR OBTAINING DISTANCE AND IMAGE INFORMATION - An optical instrument and a method for obtaining distance and image information of an object is disclosed to improve the speed and accuracy of data acquisition. The instrument comprises a camera, positioning unit, distance measuring unit, lens arrangement and control unit. The camera acquires images of an object and the control unit defines an area to be scanned as well as an object feature of the object, wherein measurement pixels corresponding to positions on the object may be defined in the area with an increased density of measurement pixels at the object feature. Subsequently, the distances to the object at the selected positions of interest are measured. | 02-04-2010 |
20100042362 | DIGITAL SIGNAL PROCESSING IN OPTICAL SYSTEMS USED FOR RANGING APPLICATIONS - Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes being too weak to allow successful ranging from a single waveform or the objects being possibly in motion during the capture of the pulse echoes. In a first embodiment of the invention, the response time at close range of a digital optical rangefinder is reduced by using a signal averaging process wherein the number of data to be averaged varies with the distance according to a predetermined function. In a second embodiment of the invention, the probability of ranging objects in motion along the line of sight of a digital optical rangefinder is increased and the object velocity measured by performing a range shift of each acquired signal waveform prior to averaging. In a third embodiment of the invention, the signal waveforms acquired in the line of sight of a digital optical rangefinder are scanned over a predetermined zone and range shifted and averaged to allow for early detection and ranging of objects that enter in the zone. | 02-18-2010 |
20100049470 | DETECTION OF A NON-UNIFORMLY SAMPLED SINUSOIDAL SIGNAL AND A DOPPLER SENSOR UTLIZING THE SAME - A Doppler sensor operates by transmitting pulses at non-uniform intervals. Samples reflected by an object are processed by multiplying each one by first and second coefficients c | 02-25-2010 |
20100063772 | Apparatus and method for measuring length of pipe - An apparatus for detecting a pipe length in an air conditioning system includes a detector to detect a signal traveled through a pipe; and a processor to determine a pipe length based on the detected signal. | 03-11-2010 |
20100076722 | DISTANCE MEASURING APPARATUS, DISTANCE MEASURING METHOD, REFLECTOR, AND COMMUNICATION SYSTEM - A transmission controller | 03-25-2010 |
20100131237 | LASER DISTANCE MEASURING GRADE ROD - A grade rod for use in a laser distance measuring system which provides a measure of distance from the on grade position of an external laser receiver to a user-defined target point without requiring the use of a pole or rod to adjust the position of the external laser receiver on the grade rod or to interpret measurements. | 05-27-2010 |
20100153062 | SYSTEM AND METHOD FOR LASER RANGE-FINDING - A system and method is described for determining a distance to a desired target via correlating a pulse modulated signal with its corresponding reflected signal, while compensating for noise error in the reflected signal to allow for a more precise distance determination. Further details and features are described herein. | 06-17-2010 |
20100153063 | AUTOMATIC PROCEDURE FOR MERGING TRACKS AND ESTIMATING HARMONIC COMBS - The present invention relates to the field of data merging, the term “data” encompassing “observation data”. It relates notably to the data obtained from processing of sonar, radar or optronic signals. The subject of the invention is a method for carrying out the spectral merging and characterization of tracks, each track including the data relating to the evolution over time of the bearing position and of the Doppler frequency of an assumed object. This method includes: a first step of merging the initial tracks which correspond substantially to identical observation directions (azimuths); and a second step of frequency analysis of the tracks resulting from merging the initial tracks and of characterizing the merged tracks whose spectrum takes the form of a harmonic comb characteristic of a single real object. The invention finds for example its application in data merging and echo classification, for narrowband passive sonar applications. | 06-17-2010 |
20100204955 | METHOD AND SYSTEM FOR POSITIONAL MEASUREMENT USING ULTRASONIC SENSING - A method for determining position and alignment is provided. The method includes monitoring a first and second sequence of ultrasonic signals transmitted from the first device to a second device, estimating a location of the first device from Time of Flight measurements of the ultrasonic signals at respective microphones on the second device, calculating a set of phase differences, weighting a difference of an expected location and estimated location of the first device with the set of phase differences to produce a relative displacement, and reporting a position of the first device based on the relative displacement. | 08-12-2010 |
20100292955 | Method and Apparatus for Measuring Microrelief of an Object - An apparatus for determining microrelief of an object periphery, comprising a ring for attachment to the object, a carriage adapted to traverse the ring; a non-contact measurement system mounted on the carriage; an advancement mechanism for incrementally advancing the carriage to a plurality of locations along the path; and a processor configured to receive and process an output of the measurement system. The processor determines a distance from the object periphery to the detector at each of the plurality of locations and automatically determines the microrelief of the object periphery from the measured distances. The apparatus and associated methods for determining microrelief may be particularly adapted to determine bark microrelief of trees, poles, pipes, or any other types of cylindrical objects. | 11-18-2010 |
20110029280 | SENSING METHOD AND DEVICE UTILIZING ALTERNATING SIGNAL FREQUENCIES - An ultrasonic sensing method and an ultrasonic sensing device are provided. The ultrasonic sensing device includes a microprocessor, a signal-driving module and a transducer module. The microprocessor generates a first driving signal with a first frequency to the signal-driving module. The signal-driving module drives the transducer module to emit a first sensing signal to a target object in response to the first driving signal. Then, a first echo signal received by the transducer is transmitted to the microprocessor to calculate a first time of flight. In a similar manner, a second time of flight is obtained based on a second driving signal with a second frequency. The microprocessor determines a final time of flight according to the first time of flight or the second time of flight. | 02-03-2011 |
20110066399 | SMALL FORM-FACTOR DISTANCE SENSOR - The subject matter disclosed herein relates to determining a distance from a mobile device to a remote object or a size of the remote object. | 03-17-2011 |
20110098970 | MEASUREMENT OF DISTANCES OR OF DISTANCE CHANGES | 04-28-2011 |
20110112795 | LIGHT CONDENSING LENS AND THREE-DIMENSIONAL DISTANCE MEASURING APPARATUS - A light condensing lens includes a plurality of lenses disposed side by side in a splitting direction of a view angle to condense incident light over a range corresponding to respective split portions of the view angle. The view angle is split in a direction orthogonal to an optical axis of the incident light. | 05-12-2011 |
20110231151 | DISTANCE DETECTION APPARATUS, AND METHOD USABLE FOR THE SAME - A distance detection apparatus for preventing the accuracy of a distance to be detected from decreasing due to a signal-to-noise ratio of an accumulated electric charge is provided. The distance detection apparatus comprises a radiation section for radiating light; a conversion section for converting light radiated and then reflected at a target object into an electric charge by each of light receiving elements arranged in a lattice; a luminance conversion section for converting the electric charge converted by each of the light receiving elements into a luminance value corresponding to the respective light receiving element; a calculation section for calculating a distance corresponding to each of the light receiving elements based on the electric charge converted by the respective light receiving element; a filter processing section for performing filter processing on the distance corresponding to each of the light receiving element based on the luminance value corresponding to the respective light receiving element; and a generation section for generating distance information representing the distance filter-processed by the filter processing section. | 09-22-2011 |
20110288818 | Method and Apparatus for Dimensional Measurement - An non-contacting measurement apparatus for measuring distances, angles and related geometric quantities, and for computing other quantities based on the measurements, is provided. A visible light beam or ultrasonic beam allows a user to point the device at one or more points to which the distance is measured, and angular rotation between the various points of interest can be measured and recorded. Then, geometric and trigonometric relationships are used to compute and display lengths, areas, volumes or other facts derived from the measurements. Various input and output features are provided in the present embodiments. | 11-24-2011 |
20110301914 | SYSTEM AND METHOD FOR RANGE-FINDING - A system and method is described for determining a distance to a desired target via correlating a pulse modulated signal with its corresponding reflected signal, while compensating for noise error in the reflected signal to allow for a more precise distance determination. Further details and features are described herein. | 12-08-2011 |
20110307215 | Distance Detection System, Method Thereof and Hand-Held Electronic Device - A distance detection system and method for use in a hand-held electronic device is described. The distance detection system comprises an input unit used to input at least one instruction; at least one processing device having a timing element and a calculating element; at least one signal device; and an air inspecting unit. The signal device is used to transmit a signal to a detecting object in response to the instruction, and to receive a response signal from the detecting object. The timing element is used to measure an interval between transmitting the signal and receiving the response signal. The air inspecting unit is used to detect a condition of air between the hand-held electronic device and the detecting object. The data of the detected air condition can be converted into a parameter to calculate distance data corresponding to a distance from both the parameter and the measured interval. | 12-15-2011 |
20110313722 | RETURN PULSE SHAPE ANALYSIS FOR FALLING EDGE OBJECT DISCRIMINATION OF AEROSOL LIDAR - A LIDAR optical remote sensing system and method analyzes the falling edge profile of a return LIDAR signal that may be indicative of an object or an aerosol cloud, which is generally more diffuse. Using the falling edge profile permits burnthrough to an object that may be obscured by the aerosol cloud. The profile is compared against at least one threshold that may correspond, in various embodiments, to a negative slope of the falling edge, an integrated power under the falling edge, or a range estimate error for varying transmitted power values, varying transmitted pulse lengths and/or varying receiver detector field of view values. | 12-22-2011 |
20120059625 | Depth sensing apparatus and method - A depth sensing apparatus is provided. The depth sensing apparatus may reset, to a reference voltage value, a voltage of each of a first floating diffusion node and a second floating diffusion node of a sensor pixel for a first time period. For a second time period, the depth sensing apparatus may control the first floating diffusion node to store a voltage of a photodiode in a first phase interval, and may control the second floating diffusion node to store the voltage of the photodiode in a second phase interval. The depth sensing apparatus may calculate a difference between the voltage of the first floating diffusion node and the voltage of the second floating diffusion node for a third time period. | 03-08-2012 |
20120095726 | System and Method for Pulse-Echo Ranging - A pulse-echo ranging system and method wherein transmit burst pulses are transmitted to a target at a first repetition frequency, an intermediate frequency signal is generated by sampling the received echo pulses from the target at a second repetition frequency slightly lower than the first repetition frequency, and the intermediate frequency signal is evaluated to determine the target distance. In order to compensate for phase error and thermal drift which may occur when the transmit and sampling instants are generated, the transmit burst pulses are periodically and alternately transmitted at the first and second repetition frequencies while the received echo pulses are simultaneously sampled at the second and first repetition frequencies, and the target distance is determined as half of the distance between echoes appearing in the intermediate frequency signal and resulting from the different clocks. | 04-19-2012 |
20120109577 | DISTANCE MEASURING DEVICE FOR GOLF - An integrated distance measuring device for golf comprises a satellite navigation receiver operable to determine a current location of the device; a laser rangefinder operable to determine a distance from the current location of the device to an object on a golf course; a compass operable to determine a bearing of the device when it is aimed at the object; a display; and a computing device. The computing device is programmed to determine a location of the object as a function of the current location of the device, the distance to the object, and the bearing of the device. The computing device may also be programmed to calculate a distance between the object and a second object on the golf course as a function of the location of the object and pre-mapped location information for the second object. The computing device may also be programmed to present on the display a representation of the current location of the device, a representation of the location of the object, a representation of the second object, a representation of the distance between the current location of the device and the location of the object, as well as a representation of the distance between the object and the second object. | 05-03-2012 |
20120116718 | MEASUREMENT APPARATUS - The present invention provides a measurement apparatus which measures a distance between a reference surface and a surface to be measured, including a wavelength reference element configured to include a gas cell in which a plurality of types of gases having absorption lines different from each other are sealed, and a processing unit configured to set a wavelength of light emitted by a light source to a plurality of different wavelengths corresponding to a plurality of different absorption lines by using the wavelength reference element, control a phase detection unit to detect a phase corresponding to an optical path length between the reference surface and the surface to be measured for each of the plurality of different wavelengths, and perform processing of obtaining the distance. | 05-10-2012 |
20120185209 | OPTICAL DISTANCE MEASUREMENT DEVICE - A sensing device comprises a transmitter and a receiver. The transmitter repetitively emits a modulated electro-magnetic signal and the emitted signal interacts with an object producing a counter propagating return signal. The return signal is detected and converted into digital signals by the receiver via a reception channel through the use of edge transitions rather than logic levels from one or more comparator outputs to reconstruct the return signal waveform. Waveform acquisition and reconstruction are based on edge sampling. Methods of providing optical feedback using a moving waveguide in time-of-flight distance measurements are also disclosed. | 07-19-2012 |
20120209563 | INFORMATION PROCESSING SYSTEM, STORAGE MEDIUM HAVING STORED THEREIN INFORMATION PROCESSING PROGRAM, INFORMATION PROCESSING APPARATUS, INPUT DEVICE, AND INFORMATION PROCESSING METHOD - An example of a configuration of an information processing system of the exemplary embodiment includes a first input device on which at least a portion of a user's body is allowed to be put and an information processing apparatus for processing data obtained from the first input device. The first input device includes a first platform on which at least a portion of a user's body is put; and a distance data output unit. The distance data output unit outputs distance data determined in accordance with a distance to an object positioned in a direction away from a platform surface of the first platform. The information processing apparatus includes a data acquisition unit and a processing unit. The data acquisition unit acquires the distance data outputted by the distance data output unit. The processing unit performs a predetermined process, based on the distance data acquired by the data acquisition unit. | 08-16-2012 |
20120283987 | FMCW DISTANCE MEASURING METHOD AND DEVICES - A method of measuring the distance uses a terminal A and a terminal B, each terminal comprising an FMCW generator for generating a signal having a predetermined frequency to time function. Terminal A transmits a transmit signal in transmit periods, which alternate with mute periods without transmission. Terminal B shifts the received signal in time from a transmit period to a mute period, for example by generating a local periodic FMCW signal, determining an adaptation of the timing of that local periodic FMCW that is needed to bring it into a predetermined timing relation to the received signal and applying the adaptation in the mute period. Terminal B transmits the shifted signal, which is received by the receiver of terminal A. Terminal A measures the frequency offset between its own transmit signal and the signal received from terminal B and calculates the distance between terminal A and terminal B from that measured frequency offset, taking into account said predetermined time offset performed in terminal B. Preferably, the transmit signal is constituted by alternating a transmit period, including n cycles of the signal generated by the FMCW generator, and a mute period corresponding with n cycles of that signal, n being at least 1. | 11-08-2012 |
20120316830 | COUPLED MULTI-WAVELENGTH CONFOCAL SYSTEMS FOR DISTANCE MEASUREMENTS - A system for measuring a distance to a substrate includes a first light source, emitting a first wavelength on a region of the substrate though a lens. A second light source emits a second wavelength region of the substrate through the lens. A first and second detector are configured to detect the first and second wavelength light reflected from the substrate. A processor is configured to compute a first response function wherein the first response function represents reflected light intensity emitted from the first light source as a function of the distance between the imaging device and substrate. A second response function represents reflected light intensity emitted from the second light source as a function of the distance between the imaging device and substrate. A ratio response function represents the ratio of the first and second response function as a function of distance between the imaging device and substrate. | 12-13-2012 |
20130018630 | METHOD AND SYSTEM FOR MEASURING DISTANCEAANM CHOU; MING-HUNGAACI TAIPEI CITYAACO TWAAGP CHOU; MING-HUNG TAIPEI CITY TWAANM HSIEH; CHING-FENGAACI TAIPEI CITYAACO TWAAGP HSIEH; CHING-FENG TAIPEI CITY TW - A method for measuring distance involves calculating a distance based on light speed and a time taken by an optical signal to travel to an object and return therefrom. The method includes calculating a time based on a cycle number of a reference signal under a clock mask synchronized with emission and reception of the optical signal; correcting the time according to a plurality of phase shift signals generated based on the reference signal; and minimizing an error of the time by increasing the quantity of the phase shift signals. The method enhances the accuracy of the measured time taken by an optical signal to travel to an object and return therefrom, speeds up measurement, and reduces the required circuit areas. A system for measuring distance is further introduced for use with the method. | 01-17-2013 |
20130096875 | LASER-BASED DIMENSIONAL OBJECT MEASUREMENT METHOD AND SYSTEM - A dimension measuring system includes at least two targets positioned at spaced apart intervals adjacent to an object. A laser-based measuring device is used to measure vectors to the targets and vectors to positions on the object. A processor coupled to the laser-based distance measuring device processes the vectors in order to simultaneously generate dimensions of the object and it's relationship to a baseline reference between the targets. The dimensions and baseline reference can be stored and/or displayed. | 04-18-2013 |
20130116971 | METHOD FOR GENERATING A SIGNAL FOR A DISTANCE MEASUREMENT AND METHOD AND SYSTEM FOR DISTANCE MEASUREMENT BETWEEN A TRANSMITTER AND A RECEIVER - For generating a signal for distance measurement between a transmitter and a receiver, a sequence of pulses with predetermined respectively different time intervals between individual pulses is generated. | 05-09-2013 |
20130179119 | DATA COLLECTION AND POINT CLOUD GENERATION SYSTEM AND METHOD - A system has a range-finding laser device coupled to an operator that performs a latest scan measuring a plurality of data points indicative of range and angle, an attitude inertial measurement unit (IMU) that is affixed to the range-finding laser device that measures pitch, roll, and yaw of the range-finding laser device, and two zero-velocity update (zupt) IMUs coupled to the operator that estimate position, velocity, and yaw of the operator. Further, the system has logic that transforms a plurality of data points from a sensor frame of reference, based upon measurements made, to a global frame of reference using data indicative of a latest global pose to obtain data indicative of transformed data points and merges the data indicative of the transformed data points with a point cloud. | 07-11-2013 |
20140142891 | GENERATON OF MAP DATA - A measurement instrument, i.e. a mobile body, measures distances between a current position of the mobile body and obstacles in the environment of the mobile body by: a) taking at least N measurements of distances between the mobile body and the obstacles, by consecutive angular steps of A/N (A is a predetermined angular sector), and combining the distances with the respective angular steps in order to establish map data; b) moving the mobile body and repeating step a) for a new current position of the mobile body; and c) simultaneously determining, according to the distances measured for each angular step of the current position of step b) and the preceding position of step a), the current position of the mobile body in step b) on the map relative to the initial position thereof in step a), and new data of the map. | 05-22-2014 |
20140180634 | SMALL FORM-FACTOR DISTANCE SENSOR - The subject matter disclosed herein relates to determining a distance from a mobile device to a remote object or a size of the remote object. | 06-26-2014 |
20140207411 | METHOD AND APPARATUS FOR COMPENSATING LATERAL DISPLACEMENTS AND LOW SPEED VARIATIONS IN THE MEASURE OF A LONGITUDINAL PROFILE OF A SURFACE - Measuring a distance to a surface while compensating for variations in a transverse position and/or low speed displacement of the instrument. One method includes retrieving a predetermined transversal distance from a longitudinal feature at which to extract a relevant distance; retrieving a distance set; retrieving a position of the longitudinal feature relative to the distance set; extracting a range point at the predetermined transversal distance from the longitudinal feature; adding the extracted point to a longitudinal distance set. In another method, if two sensors are provided with an overlap in the transversal direction, extracting a range point at a predetermined transversal position; adding the extracted range point to a longitudinal distance set; retrieving a pitch angle of the instrument; calculating a local slope of the surface using an overlapping transversal point, the pitch angle and the separation length; calculating a height variation using the local slope and a longitudinal separation. | 07-24-2014 |
20150012244 | RANGE FINDING DEVICE AND RANGE FINDING METHOD - A range finding device includes: a light projecting unit having an irradiation domain extending in a horizontal direction, and configured to project intensity-modulated irradiation light; an image capturing unit configured to capture an image of an object irradiated with the irradiation light; a light projection controller configured to control an intensity of the irradiation light in accordance with a timing at which the image capturing unit captures the image; a synchronous detection unit configured to extract a synchronous detection region, in which brightness changes in synchronism with intensity modulation of the irradiation light, from the image captured by the image capturing unit; an edge detector configured to detect an edge of the synchronous detection region; and a range calculator configured to calculate a distance to the object on the basis of the edge of the synchronous detection region detected by the edge detector. | 01-08-2015 |
20150025843 | DISTANCE MEASURING APPARATUS, DISTANCE MEASURING METHOD, AND CONTROL PROGRAM - According to an embodiment, a distance measuring apparatus includes a multi laser beam emitting unit, an irradiating position changing unit, an image acquiring unit, and a distance calculating unit. The multi laser beam emitting unit irradiates a surface of a measurement target object with a plurality of elliptical laser beams provided in line in a minor axis direction. The irradiating position changing unit reciprocally moves irradiating positions of the laser beams all together along a major axis of the laser beams. The image acquiring unit receives reflected lights of the laser beams, and acquires an image of a bright and dark pattern of the reflected lights of the laser beams formed on an image acquiring face. The distance calculating unit calculates a distance to the measurement target object based on the bright and dark pattern of the reflected lights on the image acquiring face. | 01-22-2015 |
20160047913 | DISTANCE DETERMINATION METHOD - A method for determining a distance comprises: providing at least two phase measurements made with modulated light of different modulation wavelengths, each phase measurement being indicative of the distance up to an integer multiple of a respective modulation wavelength; providing a set of possible wraparound count combinations; for each one of the possible wraparound count combinations, calculating a combination of unwrapped phase hypotheses corresponding to the at least two phase measurements; and selecting a most plausible combination of unwrapped phase hypotheses among the combinations of unwrapped phase hypotheses and calculating the distance based upon the selected most plausible combination of unwrapped phase hypotheses. | 02-18-2016 |
20160103208 | SYSTEM FOR FILTERING LIDAR DATA IN VEHICLE AND METHOD THEREOF - A system and method for filtering LiDAR data is provided. The system includes a LiDAR data collector that is configured to collect the LiDAR data from a LiDAR and store the LiDAR data in a matrix structure. A noise point determiner is configured to determine whether a first filtering condition for determining whether a point within a predetermined reference distance in the LiDAR data is present, a second filtering condition for determining whether a present point adjacent to a left and right by a reference of a reference point in the matrix structure is a first reference value or less, and a third filtering condition for determining whether a present point adjacent to a top and bottom by the reference of the reference point is a second reference value or less are satisfied. | 04-14-2016 |
20160170008 | COORDINATING DEVICES TO ESTIMATE DISTANCE, RELATIVE POSITION, AND DEVICE ATTITUDE | 06-16-2016 |
20180024335 | OBSERVATION DEVICE | 01-25-2018 |