Abstract: The present disclosure provides a scanning apparatus placement method, an apparatus and a storage medium. The method includes: establishing a calculation model of a receiving cross section of a second scanning surface; based on the calculation model of a receiving cross section, within a preset rotation range of a first scanning apparatus and an allowable range of a first distance, obtaining a distribution set of sizes of cross sections corresponding to a size of the receiving cross section, an angle of the first scanning apparatus, and a first distance; and selecting a corresponding first distance from the distribution set of sizes of cross sections, when the sizes of the receiving cross sections are symmetrically distributed relative to an angle of the first scanning apparatus.

Abstract: Embodiments of this application disclose a LiDAR and a manufacturing method of the same, where the LiDAR includes a main body and a vibration damping structure, the main body includes a fixing base, and an optical system and a scanning system mounted on the fixing base, the vibration damping structure includes multiple vibration damping units, each vibration damping unit is connected to the fixing base, each vibration damping unit is configured to mount the fixing base onto a to-be-mounted member, and an elastic center of the vibration damping structure overlaps with a barycenter of the main body.

Abstract: A control apparatus is configured to control a laser radar apparatus that includes a scanner and a detector and to acquire information about an object based on an output from the detector. The control apparatus causes the light source to emit a first laser beam having a first output value and a second laser beam having a second output value smaller than the first output value, acquires information about the object in a first scanning range in a scanning range of the scanner in a case where the first laser beam is emitted, and acquires information about the object in a second scanning range in the scanning range of the scanner closer to the scanner than the first scanning range in a case where the second laser beam is emitted.

Abstract: An optical ranging system includes: a first phase-locked loop (PLL) configured to generate a first frequency signal and a second frequency signal; a second PLL configured to generate a third frequency signal based on a control signal that is formed using the first frequency signal; an optical source coupled to the second PLL, where an intensity of an optical signal emitted by the optical source is configured to be modulated in accordance with the third frequency signal; a first single-photon avalanche diode (SPAD) configured to receive a reflected optical signal; a time-to-digital converter (TDC) coupled to the first SPAD, where the TDC is configured to generate digital samples by sampling an output signal of the first SPAD under control of the second frequency signal; a reference signal generator configured to generate a reference signal; and a mixer configured to mix the reference signal and the digital samples from the TDC.

Abstract: An optical radar includes an optical-signal receiving unit and an optical-signal pickup unit. The optical-signal receiving unit is configured to receive a reflected light. The optical-signal pickup unit is coupled to the optical-signal receiving unit and includes a first optical-signal filtering circuit and a second optical-signal filtering unit. The first optical-signal filtering circuit is configured to filter out a first interference pulse of the reflected light, wherein the first interference pulse has a first interference voltage value higher than a reference voltage. The second optical-signal filtering circuit is coupled to the first optical-signal filtering circuit and configured to generate a clock signal comprising a clock pulse; and filter out a second interference pulse that does not match the clock pulse in time point from the reflected light.

Abstract: Provided is an optical phase array antenna including a coupling unit for receiving light from a light source, a light distribution unit for distributing light propagated from the coupling unit to a plurality of optical paths, a phase modulation unit for modulating a phase of the light distributed from the light distribution unit, and a light output unit that outputs the light modulated by the phase modulation unit, and includes an antenna element waveguide extending at a predetermined length through which the light propagates, and a clad layer formed to surround the antenna element waveguide, in which the antenna element waveguide has a first recessed portion recessed downward with respect to an upper surface thereof, and the clad layer has a second recessed portion recessed downward with respect to an upper surface thereof at a position adjacent to the first recessed portion.

Abstract: A robot including a chassis; a set of wheels coupled to the chassis; a range finding system coupled to the robot; a plurality of sensors; a processor; and a tangible, non-transitory, machine-readable medium storing instructions that when executed by the processor effectuates operations including: obtaining, with the processor, distances to obstacles measured by the range finding system as the robot moves relative to the obstacles; and determining, with the processor, a position of the obstacle based at least partially on the distance measurements, including: identifying, with the processor, at least one position of the range finding system when encountering the obstacle; and determining, with the processor, the position of the obstacle based at least partially on the at least one position of the range finding system when encountering the obstacle.

Abstract: A distance measuring method is applied to measure a distance between a first device and a second device. The first device and the second device include a UWB antenna module. The distance measuring method includes: obtaining the distance between the first device and the second device as an initial distance value; obtaining an actual distance between the first device and the second device according to a first distance measuring mode in response to the initial distance value being in a first distance range; and obtaining the actual distance between the first device and the second device according to a second distance measuring mode in response to the initial distance value being in a second distance range. The second distance measuring mode and the first distance measuring mode are configured to obtain the actual distance between the first device and the second device based on the UWB antenna module.

Abstract: The present invention relates to a method and apparatus for passive multistatic radar detection of aerial objects using preexisting commercial broadcast transmitters and an internet-connected network of passive receivers inexpensive enough and packaged in such a way as to support deployment to nationwide scale by crowd-sourcing.

Abstract: A beamforming system and method is disclosed comprising a hybrid multi-measurement unit or process that can encode or embed broadband signals in a low dimensional encoding subspace such as a Slepian subspace. The direction-of-arrival of the plane wave signals, encoded with the low dimensional embedding, can be used to provide a spatially sampled signal to a front-end mixed-signal circuitries substantially reduced hardware for beamforming systems. The beamforming array has a finite array aperture to which a temporal snapshot of the signal can be acquired and then processed as a set of samples from a time-limited bandlimited sequence.

Abstract: A vehicle radar system (3) adapted to be placed in an ego vehicle (1) and comprising a control unit (4) and at least one transceiver arrangement (5) arranged to generate and transmit an FMCW signal (6; 6a, 6?a; 6b, 6?b) and to receive reflected signals (7) that have been reflected by one or more target objects (14, 15), each target object having an associated determined target object velocity (v2, v3). The FMCW signal (6) comprises a corresponding plurality of frequency ramps (r1, r2), where each one has a certain duration time (tr1, tr2). The control unit (4) is adapted to control the transceiver arrangement (5) to generate at least two pluralities (6a, 6?a; 6b, 6?b, 6c, 6?c) of ramps (r1, r2). The ramps (r1) in each plurality (6a, 6?a) of ramps (r1) are adapted to have a ramp period time (tT1) that differs from the ramp period time (tT2, tT3, tT4) in all other pluralities (6b, 6?b, 6c, 6?c) of ramps (r1, r2).

Abstract: An occupant detection device includes: an occupant detection unit to output detection results about occupants, each of the detection results being detected using an electric wave and being about a corresponding one of seat positions of the occupants; an output determination unit to output the detection results in accordance with the vibration amount of the vehicle; a storage control unit to store the detection results while linking the detection results with the seat positions; and a movement detection unit to detect a movement as to each occupant detected using means other than an electric wave. When the movement detection unit detects a movement of an occupant in a state where no detection result is outputted from the output determination unit, the storage control unit corrects a link between a detection result and a seat position which are stored.

Abstract: The present disclosure provides a multiple-input multiple-output (MIMO) radar system and a method for detecting an object in a scene. The method comprises transmitting frequency modulated continuous wave (FMCW) in a radio frequency (RF) band, and collecting radar measurements of the scene sampled in a time-frequency domain within an intermediate frequency (IF) bandwidth. The method further comprises transforming the radar measurements into range-doppler space to produce measurements of different segments of the scene for different range-doppler bins formed by intersections of different range bins with different Doppler bins, classifying a presence of the hypothetical transmitter at different segments of the scene according to a signal model with an internal classification, combining the results of the classification to produce parameters of the object, and outputting the parameters of the object.

Abstract: The techniques and systems herein enable track association based on azimuth extension and compactness errors. Specifically, first and second tracks comprising respective locations and footprints of respective objects are received. An azimuth distance is determined based on an azimuth extension error that corresponds to azimuth spread between the first and second tracks with respect to a host vehicle. A position distance is also determined based on a compactness error that corresponds to footprint difference between the first and second tracks. Based on the azimuth and position distances, it is established whether the first object and the second object are a common object. By doing so, the system can better determine if the tracks are of the common object when the tracks are extended (e.g., not point targets) and/or partially observed (e.g., the track is not of an entire object).

Abstract: A method, a sensor and a system for observing the presence, location, movement and/or attitude of a person in a monitored area. The sensor comprises means for processing the measurement signal of the sensor, such as measuring electronics, and means for communicating measurement results and/or data relating to the measurement results for further processing. The sensor is a radar-based sensor, such as an as a frequency-modulated continuous-wave MIMO radar-based sensor, configured to detect persons in the monitored area and to measure and detect the location, velocity and/or shape of the monitored person. The sensor comprises means for detecting the orientation of the sensor, such as an acceleration sensor, and the sensor is configured to take the detected orientation of the sensor into account when determining measurement results for the monitored person, e.g. by compensating the measurement results based on the detected orientation.

Abstract: This disclosure relates generally to Synthetic Aperture Radar (SAR) reconstruction and finds wide application in remote sensing. Conventional approaches either involve huge computational requirement for processing or require specialized hardware along with many additional Radio Frequency (RF) components. The present disclosure provides two approaches for temporally sampling a received pulse compressed signal at two sub-sampling factors, wherein both methods involve frugal hardware implementation. Reconstruction approach of the art is based on the principle of difference ruler and is not suitable for SAR image reconstruction due to the large measurements and image dimensions. In accordance with the present disclosure, the reconstruction problem is framed as an inverse imaging problem by suitably using a forward model and employing an approach like Alternating Direction Method of Multipliers (ADMM) for solving this model which allows use of readily available Plug and Play (PnP) priors.

Abstract: The change detection device 10 includes a three-dimensional structure reconstruction unit 11 which reconstructs a three-dimensional structure of a predetermined area in an observed area, a phase eliminator 12 which eliminates phase signals in the predetermined area in multiple SAR images in which the observed area is taken, using the three-dimensional structure, and a change detection unit 13 which generates a coherence image from a SAR image pair from which the phase signals are eliminated and detects change in the observed area based on coherence values of pixels constituting the coherence image.

Abstract: The present invention relates to a method and system for Phaseless Passive Synthetic Aperture Radar (PPSAR) imaging. Existing method for image reconstruction requires large number of measurements for satisfactory PPSAR image reconstruction. However, this leads to provisioning of more on-board storage and/or a high-speed data link between a mobile platform and a ground station. These requirements are undesirable in practice as PPSAR image reconstruction systems are deployed on resource constrained platforms. The present disclosure uses a regularized Wirtinger Flow (rWF) based approach that uses appropriate regularizers to facilitate the PPSAR image reconstruction with fewer measurements. Further the PPSAR image reconstruction is achieved using Alternating Direction Method of Multipliers (ADMM) by employing standard denoisers such as Total Variation (TV), Block-matching and 3D filtering (BM3D) and, Deep Image Prior (DIP).

Abstract: A method, system and vehicle that repetitively correct angle offsets in a synthetic aperture radar image of a vehicle while the vehicle is in motion by utilizing a radar system and a camera to determine accurate velocity of a measured object by matching angles of the object in the SAR image with angles of the object in the camera image, thereby reducing angle offsets of objects in the SAR image. The method includes obtaining an SAR image of another vehicle via a radar unit of the vehicle, obtaining a camera image of the other vehicle via a camera unit of the vehicle, determining an association between at least one object in the SAR image and a corresponding at least one object in the camera image, correcting a velocity estimation of the vehicle based on the determined association, and adjusting the SAR image based on the corrected velocity estimation.

Abstract: Disclosed are a method and system for evaluating sonar self-noise at a ship design stage. The method includes: building a ship structure full-scale geometric simulation model; acquiring loss factors and sonar transducer space outfitting acoustic absorption coefficient material parameters; acquiring mechanical excitation, hydrodynamic excitation, and propeller excitation; inputting the loss factors and the sonar transducer space outfitting acoustic absorption coefficient material parameters into an established statistical energy evaluation model, and applying a mechanical excitation to a face plate of foundation of the built ship structure full-scale geometric simulation model, applying a hydrodynamic excitation to the surface of a ship hull, and applying a propeller excitation to a stern shaft to perform calculation of sonar self-noise of a ship to obtain total spectral density level of the sonar self-noise; and evaluating spectral density level calculation results by index requirements.

Abstract: A sonar survey system and method excites reflectors using a broadband message that excites all frequencies within the band providing for selection and evaluation of frequencies of interest after the survey is completed.

Abstract: A fish finder system is provided with a capture device information input terminal configured to input a capture device information, a capture device dropping point input terminal configured to input a dropping point at which a capture device is dropped, a tidal current input terminal configured to input tidal current information including a tidal current direction and a tidal current speed, and processing circuitry communicatively coupled to the capture device information input terminal, the capture device dropping point input terminal, and the tidal current input terminal. The processing circuitry is configured to calculate a drift amount of the capture device relative to the dropping point and calculate a capture device arrival point at which the capture device arrives in the water.

Abstract: A light detection and ranging (LIDAR) system is provided that includes a first optical source and a second optical source configured to emit respectively a first optical beam and a second optical beam that are nondegenerate and are chirped antiphase, lensing optics to direct the first and second optical beams toward a target, and collect a first return signal and a second return signal, and a first optical detector and a second optical detector configured to generate a first signal from the first return signal mixed with a first local oscillator and a second signal from the second return signal mixed with the second local oscillator.

Abstract: A light detection and ranging (LIDAR) system is provided that transmits optical beams and detects return optical beams. The optical beams are frequency modulated with sweeps of a frequency band to produce chirps, each sweep being divisible into multiple sub-sweeps. Multiple simultaneous measurements of first and second beat frequencies are made per sweep produce chirps from the transmitted optical beams and the return optical beams. A signal processor is configured to determine a range and velocity of a target from the multiple simultaneous measurements. At least one of the sweeps is used to produce a custom simultaneous measurement of the beat frequencies for a custom sub-sweep. A custom sub-sweep value of range and velocity is determined from the custom simultaneous measurement, there being at least the sweep value and the custom sub-sweep value of range and velocity for the at least one of the multiple sweeps.

Abstract: A device and a method for detecting objects in a monitored zone are provided. At least one FMCW LiDAR sensor scans a plurality of measurement points in the monitored zone and generates measurement data from transmitted light remitted or reflected by the measurement points, with the measurement data comprising radial speeds of the measurement points. A control and evaluation unit is configured to segment the measurement points and to combine them into objects and/or object segments and to determine a movement pattern of at least one object segment using the radial speeds of the measurement points associated with the object segment.

Abstract: A method of operating a light detection and ranging (LiDAR) system is provided that includes performing a scene measurement using a LiDAR sensor capable of measuring Doppler per point. The method also includes estimating a velocity of the LiDAR sensor with respect to static points within the scene based on the scene measurement. The method may also include compensating for the velocity of the LiDAR sensor and compensating for a Doppler velocity of the LiDAR sensor.

Abstract: Disclosed herein are systems, methods, and computer program products for operating a lidar system. The methods comprise: performing operations by each of a plurality of photodetectors to facilitate measurements of an intensity of a light signal reflected off an object external to the lidar system; receiving, by a processor, result values from the photodetectors that indicate measured reflected intensities of the light signal; performing, by the processor, at least one convolutional algorithm to combine different sets of the result values to produce a plurality of feature values; and generating, by the processor, at least one depth image or point cloud comprising a plurality of super pixels having values respectively set to the feature values.

Abstract: A time-of-flight sensor includes a substrate, a single photon avalanche detection chip, a vertical cavity surface-emitting laser, a first narrowband pass filter glass, and a second narrowband pass filter glass and a resin shell. The single photon avalanche detection chip is attached on the substrate, and the vertical cavity surface-emitting laser is also attached on the substrate. The first narrowband pass filter glass is arranged above the single photon avalanche detection chip, and the second narrowband pass filter glass is arranged above the vertical cavity surface-emitting laser. The resin shell covers the first narrowband pass filter glass and the second narrowband pass filter glass, and an upper surface of the first narrowband pass filter glass and an upper surface of the second narrowband pass filter glass are coplanar with an upper surface of the resin shell.

Abstract: A computer-implemented method of computer-implemented method of perceiving structure in a point cloud comprises: applying clustering to the point cloud, and thereby identifying at least one moving object cluster within the point cloud, the point cloud comprising time-stamped points captured over a non-zero accumulation window; determining a motion model for the moving object cluster, by fitting one or more parameters of the motion model to the time-stamped points of that cluster; using the motion model to transform the time-stamped points of the moving object cluster to a common reference time; and applying a perception component to the transformed points of the moving object cluster to extract information about structure exhibited in the transformed points.

Abstract: A functional safety system of a robot according to an exemplary embodiment of the present disclosure can duplicate modules so as to satisfy a performance level d (pl-d) required for the functional satisfy of a robot.

Abstract: An example sensor system for use with a vehicle includes a first group of sensing devices that are associated with an essential level of autonomous operation of the vehicle. The first group of sensing devices are configured and intended for continuous use while the vehicle is being autonomously operated. The sensor system further includes a second group of sensing devices that are associated with a non-essential level of autonomous operation of the vehicle. For example, the second group of sensing devices are configured to be redundant to and/or to enhance the performance of the first group of sensing devices. The second group operates in response to certain conditions being determined during autonomous operation of the vehicle. The sensor system further includes a plurality of assemblies attached to the vehicle. Each assembly includes two or more sensing devices from the first group and/or the second group.

Abstract: A system can include (and/or receive data from) one or more data sources (e.g., satellites, reference stations, etc.), a computing system (e.g., a corrections generator thereof), a GNSS receiver, one or more sensors, and/or any suitable component(s). A method can include receiving satellite observations at a first signal frequency, determining GNSS corrections for a second signal frequency, determining a GNSS receiver position based on the GNSS corrections, and/or any suitable step(s).

Abstract: A target device receives a plurality of pieces of first data, where each piece of the plurality of pieces of first data includes first ephemeris information and/or first almanac information. The target device identifies abnormal first data among the plurality of pieces of first data, where the plurality of pieces of first data include the abnormal first data, and the plurality of pieces of first data are obtained by the target device from a plurality of access network devices. A plurality of pieces of first ephemeris information and/or a plurality of pieces of first almanac information in the plurality of pieces of first data correspond to a first satellite. The target device may determine, by using the plurality of pieces of first ephemeris information and/or the plurality of pieces of first almanac information, that a piece of first ephemeris information and/or a piece of first almanac information is abnormal.

Abstract: Embodiments of the present disclosure disclose a method and a system for tracking the position of the one or more moving objects. The method includes collecting GNSS measurement data of satellite signals transmitted from multiple satellites. The method further includes extracting values of a plurality of features from the GNSS measurement data. The method includes mapping the extracted values of the plurality of features to a source domain. The method includes classifying the mapped transformed plurality of features using a neural network. The neural network is trained over simulated data sampled from a source domain. The method includes identifying multipath measurements of the GNSS measurement data based on classification of the corresponding mapped transformed plurality of features. The method includes tracking the position of the one or more moving objects by processing identification of GNSS measurement data affected by multipath.

Abstract: Host vehicle position measuring accuracy can be improved even in a situation where a position of a feature present around the host vehicle cannot be detected on the basis of sensor information from an in-vehicle sensor. A host vehicle position measuring device is configured to include: a host vehicle position measuring unit that measures a position of a host vehicle using a satellite signal emitted from a satellite positioning system; and a position correcting unit that estimates, using an error estimating model for estimating a position measuring error in the host vehicle position measuring unit, a measuring error corresponding to the position of the host vehicle measured by the host vehicle position measuring unit, and corrects the position of the host vehicle measured by the host vehicle position measuring unit using the measuring error.

Abstract: The present invention relates to a device (16) for determining the attitude of a carrier comprising a GNSS receiver apt to receive GNSS signals from one or a plurality of antennas (14) arranged in known positions; the determination device (16) comprising: a movement generation module (22) configured for generating a movement of an apparent phase center according to a control law; a control module (23) configured for determining the control law; a determination module (24) configured for determining an absolute orientation of a vector of interest from at least one observable value supplied by the GNSS receiver (12) and from the control law, and for determining at least one component of the attitude of the carrier from the absolute orientation of the vector of interest.

Abstract: A device for determining radon concentration is provided. The device includes a diffusion chamber, that includes a number of openings that allow radon gas to enter and exit, and a radon sensing arrangement. The radon sensing arrangement includes at least one processing device and one or more detectors, arranged inside the diffusion chamber in such a way that no part of the diffusion chamber is located at a distance, perpendicular to the detector, of more than 20 mm from the closest part of a detector. The at least one processing device is arranged to determine the radon concentration by analyzing and processing the energy spectrum of alpha particles detected by the one or more detectors.

Abstract: A signal processing system and method for a radiation detector based on a metal oxide semiconductor (MOS) transistor are disclosed. The signal processing system includes a power supply generation module, an analog signal processing module, and a digital signal acquiring-processing module. The power supply generation module provides a novel power supply method, and converts a positive high voltage power supply into a negative high voltage power supply to supply power to a last dynode of a photomultiplier tube (PMT). The analog signal processing module converts a negative current pulse signal into a voltage difference signal. The digital signal acquiring-processing module acquires a signal of the analog signal processing module, and converts the signal into a digital signal for identification.

Abstract: A radiation detector includes a sensor, an A/D converter, and processing circuitry. The sensor outputs a pulse signal based on incidence of radiation. The A/D converter generates digital data by performing A/D conversion on the pulse signal. The processing circuitry acquires temperature information of the A/D converter and outputs digital data that is compensated based on the temperature information.

Abstract: Disclosed is a geophysical data acquisition system. The system comprises a frame assembly; a set of ground engaging members connected to the frame assembly, and adapted to move the frame assembly along the ground surface; and a carrier assembly carried by the frame assembly, the carrier assembly having one or more seismic source subsystems and a drive mechanism adapted to move each of the one or more seismic source subsystems through a plurality of positions between a lowered position and a raised position and forward and rearward positions with respect to the frame assembly. The movement of each of the one or more seismic source subsystems being in coordination with the movement of the frame assembly, such that each of the one or more seismic source subsystems move to the lowered position when the frame assembly approaches one or more data acquisition points on the ground surface.

Abstract: The adjustable voltage regulator under control of a microcontroller applies controlled amplitude voltage in the range of 5 to 9 VDC to the sensor transmitter to adjust the output amplitude of the transmitter. The adjustable amplitude transmitter allows an occupancy sensor to have its total output energy adjusted to reduce environmental noise-induced false triggering and to conform to the area to be covered. Lowering the total ultrasonic energy in the monitored space lowers the sensitivity of the receiver to inappropriate activations. Lowering the input power to the transmitter also lowers the total internal system noise and provides an improved signal to noise ratio in the receiver.

Abstract: Disclosed is a method for processing seismic data relating to a reservoir zone comprising a plurality of substantially vertical wells and one or more non-vertical wells. The method comprises obtaining a trained neural network, having been trained to infer well data from seismic data and having been trained on training well data relating only to said substantially vertical wells using the trained neural network to invert seismic data relating to said reservoir zone, to obtain inversion well data. The inversion well data is compared to observed well data relating to the reservoir zone and a trajectory correction is determined to correct a trajectory of a non-vertical well of said one or more non-vertical wells based on the comparison.

Abstract: The present disclosure relates to a seismic imaging free gas structure identification method and system, The method includes: acquiring a seismic imaging dataset, and annotating free gas structures in the seismic imaging sample data set to obtain a training dataset; using a generative adversarial network (GAN) to expand the training dataset for network training, wherein the GAN includes a generative network and a discrimination network; conducting domain conversion on original label data of the free gas training samples to obtain annotating labels: training a Bayesian neural network according to the free gas training datasets and labels, to obtain a free gas structure identification model; acquiring actual seismic imaging data of a target work area; and conducting, according to the actual seismic imaging data, identification by using the free gas structure identification model.

Abstract: The present disclosure belongs to the field of geological exploration, and particularly relates to a seismic acquisition system based on a frequency domain expansion MEMS sensor, aiming at solving the problem that vibration frequencies exceed the frequency range of the MEMS sensor due to strong vibrations and cross coupling of multi-frequency signals usually occurring in well logging while drilling. When the MEMS sensor suffers strong vibrations or the MEMS sensor that can be selected cannot ensure that the frequency requirement of a measurement signal is stably met, the frequency domain expander of the present disclosure expands the frequency domain of a detection signal, so that the MEMS sensor can measure strong vibrations and out-of-band frequencies to a certain extent, the application range of the seismic acquisition system is extended, and the anti-mutation capability of the seismic acquisition system is improved.

Abstract: A multi-purpose detection circuit for object detection and vehicle position determination is described. For example, the circuit is configurable for detecting foreign metallic objects, living objects, and a vehicle or type of vehicle above an inductive wireless power transmitter. The circuit is also configurable for determining the vehicle's position relative to the inductive wireless power transmitter. An example apparatus includes a measurement circuit including a multiplexer, electrically connected to a plurality of inductive and capacitive sense circuits, for measuring one or more electrical characteristics in each of the inductive and capacitive sense circuits according to a predetermined time multiplexing scheme.

Abstract: A metal detecting device includes: a transfer section that transfers an inspection target object, along a path that passes between a first magnet and a second magnet; a first magnetic sensor that is arranged so as to be aligned with the first magnet and that outputs a first signal; and a second magnetic sensor that is arranged so as to be aligned with the second magnet and that outputs a second signal, whether or not the inspection target object contains metal being determined on the basis of strength of the first signal and a phase difference between the first signal and the second signal.

Abstract: A metal detection apparatus is disclosed which includes a balanced coil system with a transmitter coil and receiver coils. A coupling transformer with an input winding is energized by an input signal with a selected operating frequency and an output winding with tappings, each pair of which is selectable to define a partial winding consisting of the turns extending between the selected pair. Individually selectable excitation circuits for energization of the transmitter coil, each including a semiconductor switching device. Individually selectable tuning capacitors, each including an electro-mechanical relay.

Abstract: A determination of a continuous oil density log for a hydrocarbon reservoir accessible via a well drilling into the formation having the reservoir. The logging operations may be conducted in the well to generate a carbon-oxygen ratio (C/O) log, a water saturation log, and a porosity log. A continuous oil density log may be determined using the C/O log, the water saturation log, the porosity log, and carbon and oxygen density values. The continuous oil density log may be used in further characterization and development of the hydrocarbon reservoir.

Abstract: Systems and method presented herein enable the estimation of porosity using neutron-induced gamma ray spectroscopy. For example, the systems and methods presented herein include receiving, via a control and data acquisition system, data relating to energy spectra of gamma rays captured by one or more gamma ray detectors of a neutron-induced gamma ray spectroscopy logging tool. The method also includes deriving, via the control and data acquisition system, one or more spectral yields relating to one or more elemental components from the data relating to the energy spectra of the gamma rays. The method further includes estimating, via the control and data acquisition system, a measurement of porosity based on the one or more spectral yields relating to the one or more elemental components.

Abstract: A method, and corresponding system, provides enhanced security threat detection. The method includes: irradiating a target from a stationary x-ray source having end-point energy of at least 88 keV; enabling target motion with respect to the stationary x-ray source; detecting resulting x-rays received from the target; generating an image of an interior of the target based on the resulting x-rays; performing analysis of the image for an indication of a weapon; producing signals representing an energy spectrum of the resulting x-rays; analyzing the signals for characteristic x-ray fluorescence that can be emitted from lead potentially present in the target; providing an indication, based on the signals, of a probability of lead ammunition being present; and outputting an indication of likelihood of a security threat based on the analysis of the image for the weapon indication and the probability of lead ammunition.