Abstract: Superconducting integrated circuits may advantageously employ superconducting resonators coupled to a microwave transmission line to efficiently address superconducting flux storage devices. In an XY-addressing scheme, a global flux bias may be applied to a number of superconducting flux storage devices via a low-frequency address line, and individual superconducting flux storage devices addressed via application of high-frequency pulses via resonators driven by the microwave transmission line. Frequency multiplexing can be employed to provide signals to two or more resonators. A low-frequency current bias may be combined with a high-frequency current in one or more superconducting resonators to provide Z-addressing. A low-frequency current bias may be combined with a high-frequency current in one or more superconducting resonators to eliminate a flux bias line.

Abstract: A magnetic sensing device including a substrate having a supporting surface on which a first sensing area, a third sensing area, and a second sensing area are consecutively arranged in a direction of movement. The first, the second, and the third sensing areas are provided with a first midline, a second midline, and a third midline in the direction of movement, respectively. The first and second midlines are symmetrical with respect to the third midline. The first and second sensing areas are jointly configured to output a first output signal. The third sensing area is configured to output a second output signal. A phase difference between the first and second output signals is 90 degrees, and the first and second output signals are jointly configured to determine the distance or the speed or the angle of movement and the direction of movement of the relative motion.

Abstract: The present disclosure relates to a current sensor, including a magnetic-field sensor for measuring a magnetic field induced by an electrical current; an output connection for providing an amplified measurement signal from the magnetic-field sensor, the magnetic-field sensor and the output connection being connected by an analog signal path having at least one amplifier, the analog signal path having a frequency response; a temperature sensor for measuring a temperature; and a compensation circuit which is coupled to the analog signal path and is configured to correct the frequency response of the analog signal path based on the temperature.

Abstract: To provide a magnetic sensor capable of detecting a weak magnetic field at a position situated apart from a magnetic field source. A magnetic sensor includes magnetic bodies whose magnetic collecting surfaces face mutually opposite sides and a magnetic detecting part 30 that detects magnetic flux passing between the magnetic bodies. With this configuration, magnetic flux collected from one magnetic collecting surface of one magnetic body passes to another magnetic collecting surface of another magnetic body through the magnetic detecting part, thereby making it possible to efficiently collect a magnetic field spreading in a space. Thus, even when a distance from a magnetic field source is large, magnetic collection can be achieved with high uniformity of a magnetic field.

Abstract: Disclosed herein is a magnetoresistive magnetic field sensor which, inter alia, includes four magnetoresistive elements arranged in a Wheatstone full bridge circuit. A first magnetoresistive element and a second magnetoresistive element, which respectively have an inverse behavior in relation to a change in conductance, are arranged in a first half bridge. A third magnetoresistive element and a fourth magnetoresistive element, which respectively have an inverse behavior in relation to a change in conductance, are arranged in a second half bridge. At least two of the four magnetoresistive elements have different conductance values when no external magnetic field is present. In each case, two of the four magnetoresistive elements have the same conductance if an external magnetic field with a predefined magnetic field strength is present.

Abstract: An apparatus is provided for reel-to-reel assessment of superconducting tapes (for example, REBCO CC tape) at low temperatures (for example, less than or equal to 65K). For example, the apparatus may be a force magnetometer. The apparatus may include one or more reels and pulleys used to move the superconducting tape into and out of a cryostat. The apparatus may also include a permanent magnet or electromagnet provided at a low temperature proximate to the tape. The magnet induces screening currents in the tape. The apparatus may also include an electric motor used to drive movement of the tape relative to the magnet. A tension meter may be provided to measure a tension of the tape. Alternatively, a current provided to the motor may also be measured. The apparatus may be used to measure the critical current at various positions on the superconducting tape at the low temperatures.

Abstract: Embodiments of the present invention disclose a magnetic resonance system and a magnetic resonance scanning control method, the method comprising: acquiring a three-dimensional body model of a scan subject; receiving a user operating instruction to mark an implant in the three-dimensional body model of the scan subject to generate a simulated scan subject; acquiring current positioning information of the scan subject on a scanning table, and determining, on the basis of the current positioning information, virtual positioning information of the simulated scan subject in a virtual space, the virtual space comprising distribution information of a spatial field gradient of the magnetic resonance system; and on the basis of the virtual positioning information, evaluating a safety risk related to the spatial field gradient.

Abstract: An angle adjustment mechanism has a block, a projecting piece, and a connection mechanism. The projecting piece is fixed to a stator. The connection mechanism has elongated holes provided in the block and a shaft member provided in the projecting piece. The shaft member is inserted in the elongated holes. During a tilt angle adjustment process, the shaft member is caused to move in a sliding motion in the elongated holes. During a cooling process, the shaft member is also caused to move in a sliding motion in the elongated holes.

Abstract: Provided is an RF shield that achieves a balance between an improved irradiation efficiency and suppression of eddy current-induced heat by a gradient magnetic field coil, while avoiding complexity of conductor pattern design for suppressing an eddy current by the gradient magnetic field coil. A cylindrical RF shield, which is one of elements constituting a high-frequency coil unit, is formed by rolling patterned conductive thin films formed on both front and back surfaces of an insulating sheet, front and back patterns of the patterned conductive thin film are mirror-symmetrical in a central axis direction of a cylinder, the front pattern is divided into two in the central axis direction, one side of two divided patterns is further divided into two in a circumferential direction, each of three independent pattern islands has slits such that strips are formed along to the cylinder axis direction, and each of the strips has a portion connected in an up-down direction at one location.

Abstract: A radio frequency (RF) receiver array for magnetic resonance imaging, the RF receiver array (1) comprising at least one receiver coil element (2) for receiving a magnetic resonance signal from at least a portion of a target region, at least one on-board digital receiver circuit (3) for processing the received magnetic resonance signal. For on-coil digitization of the magnetic resonance signal the on-board digital receiver circuit (3) comprises an application-specific integrated circuit (4), ASIC. The RF receiver array (1) further comprises a plurality of signal lines (5) configmed and arranged to carry data between the on-board digital receiver circuit (3) and a receiving unit (3, 7). For providing a capacitive communication between the on-board digital receiver circuit (3) and the receiving unit (3, 7) the ASIC (4) comprises at least one on-chip capacitor (6) for each signal line (5), wherein the on-chip capacitor (6) is disposed in series with the signal line (5).

Abstract: A shielded gradient coil assembly (40) to generate a gradient magnetic field, the assembly comprises on a plurality of radially inner and outer coaxial cylindrical surfaces a gradient field coil arrangement on the radially inner cylindrical surfaces including a longitudinal gradient field coil system (131) having one or more axial circumferential electrically conducting hollow z-field windings having a smaller transverse cross-section and a transverse gradient field coil system (132) having hollow (x,y)—field electrical conductors having a smaller transverse cross-section and arranged as saddle coils on the surfaces of the inner cylindrical surfaces.

Abstract: A system, method and computer program product for generating a data record of a training dataset set configured to train a neural network for determination of the concentration of a particular target molecule in an NMR sample. An NMR spectrum associated with a known concentration of the target molecule is obtained. The obtained NMR spectrum is adjusted by applying a random shift to generate an adjusted NMR spectrum. A background generator adds a background spectrum which reflects contributions of impurities in the NMR sample. The resulting NMR spectrum together with the information about the concentration of the target molecule is then stored as a new data record of the training dataset.

Abstract: In variants, the system (e.g., a nuclear magnetic resonance system) can include: a magnet array, a housing, a transmitter, a receiver, and a processing system. In variants, the method can include: sampling a calibration measurement, determining a reference frequency based on the calibration measurement, and sampling an experiment measurement. The method can optionally include: processing the experiment measurement, determining an analyte level, and/or any other suitable steps.

Abstract: A method for calculating an operating parameter of a magnetic resonance sequence, a magnetic resonance apparatus, and a computer program product are disclosed. According to the method, at least one initial sequence parameter of a radio-frequency (RF) transmit pulse of the magnetic resonance sequence is provided. In addition, at least one test RF transmit pulse is determined, (e.g., calculated and/or modeled and/or simulated), wherein the at least one test RF transmit pulse is adapted based on the at least one initial sequence parameter to a specified, in particular geometric, standard shape. The at least one operating parameter is determined, (e.g., calculated), with the assistance of the at least one test RF transmit pulse. It is in particular assumed in this respect that the at least one test RF transmit pulse is applied on performance of the magnetic resonance sequence.

Abstract: In MRI using an SE-based pulse sequence, an object is to suppress flow artifacts and acquire a flow artifact-free image regardless a velocity or a direction of blood flow. A pair of gradient magnetic field pulses are applied before and after a 180-degree pulse of the SE-based pulse sequence, and a plurality of times of imaging are performed using varying intensities of the pair of gradient magnetic field pulses. Image reconstruction is performed by performing a Fourier transformation on measurement data obtained through the plurality of times of imaging in an axial direction of the intensities of the gradient magnetic field pulses, that is, a velocity encoding direction. As a result, images can be separated for each velocity of a stationary tissue and a non-stationary component included in tissues, and an image of spins with a velocity of zero, that is, a flow artifact-free image of the stationary tissue, can be obtained.

Abstract: The invention relates to a method for operating an imaging examination device (1), wherein signals are received from an object (5) to be examined and are identified and displayed in layers in the form of sectional images and/or three-dimensional images of the object (5), having the following steps: a) ascertaining a desired imaging layer (4) of the object (5) to be examined, b) determining the coordinates of a desired target point (6) in the desired imaging layer (4), c) determining the coordinates of a corrected target point (6?) while taking into consideration a distorted gradient field of the examination device (1) such that the examination device detects an imaging layer on which the desired target point (6) lies on the basis of the distorted gradient field while using the corrected target point (6?) instead of the desired target point (6), and d) detecting an imaging layer (4) by means of the examination device (1) using the corrected target point (6?) and visualizing an image obtained therefrom.

Abstract: Systems, devices, methods, and techniques for self-correcting current measuring are disclosed. Advanced material inductive measuring devices can obtain a reading of a monitored current in a monitored source. The advanced material allows the measuring device to operate at low temperatures disproportionate to saturation levels. Readings by the measuring device that are beyond a top-end limit of the measuring system or otherwise outside of a desired band can be transformed or transposed by employing a transformation to correct the reading to be within an acceptable ratio error band.

Abstract: A method for performing calibration of magnetometers is provided. In some embodiments, the method involves obtaining a sequence of gyroscope measurements from one or more gyroscopes and a sequence of magnetometer measurements from one or more magnetometers. In some embodiments, the method involves determining a sequence of angular velocity estimates based on the sequence of gyroscope measurements. In some embodiments, the method involves determining a first estimate of a derivative of an external magnetic field based on the sequence of magnetometer measurements. In some embodiments, the method involves determining a second estimate of the derivative of the external magnetic field based on the sequence of angular velocity estimates. In some embodiments, the method involves identifying magnetometer calibration constants based on a difference between the first estimate of the derivative and the second estimate of the derivative.

Abstract: A system may include a receiver node. The receiver node may include a communications interface and a controller. The receiver node is time synchronized with a transmitter node to apply Doppler corrections to the receiver node's own motions relative to a common reference frame. The receiver node may be configured to: The receiver node may be configured to: based at least on the receiver node being time synchronized with the transmitter node to apply Doppler corrections and the common reference frame, use Doppler null scanning (DNS) to determine DNS derived information, the DNS derived information including a bearing and the receiver node's relative position relative to the transmitter node; and output a position, navigation, and timing (PNT) solution based at least on the DNS derived information.

Abstract: A method for modifying a repeat interval of a locator beacon is described. The method includes transmitting repeatedly, by a beacon transmitter, a first advertising beacon signal through a first number of transmission repetitions spaced at a first repeat interval. The method further includes transmitting repeatedly, by the beacon transmitter, a second advertising beacon signal through a second number of transmission repetitions at a second repeat interval, wherein the second advertising beacon signal includes an identifier that provides identification of the beacon transmitter and user information. The method further includes receiving a modification instruction from a user device. The modification instruction is configured to modify the first repeat interval into a third repeat interval. The method also includes transmitting repeatedly, by a beacon transmitter, the first beacon signal through the first number of transmission repetitions spaced at the third repeat interval.

Abstract: Various aspects of the present disclosure relate to positioning measurement reporting using small data transmissions. One apparatus includes at least one memory and at least one processor that is configured to a receive a positioning report segmentation configuration comprising a set of segmentation criteria for segmenting a positioning report, segment the positioning report according to the set of segmentation criteria, and transmit the segmented positioning report using a small data transmission (“SDT”) uplink connection in a low power state.

Abstract: Determining location of a mobile device includes determining the proximity of the mobile device to a predetermined location. Based on the proximity determination, a locational accuracy criterion is selected and the location of the mobile device is determined according to the selected locational accuracy criterion.

Abstract: A circuit including a first circuit, a second circuit and a controller is provided, the first circuit and the second circuit each including a sample-and-hold circuit configured to hold a level of an input signal of a specific timing and an analog-to-digital converter circuit configured to convert the level of the input signal held in the sample-and-hold circuit into digital data and to output the digital data, the controller being configured to cause the first circuit to output the level of the input signal of a first timing and to cause the second circuit to output the level of the input signal of a second timing.

Abstract: Systems and methods of diagnosing sensor performance of an ultra wide band (UWB) sensor localization for a vehicle are provided. The method comprises receiving sensor signals from at least four UWB anchors and a UWB tag for a time period. The sensor signals represent anchor coordinates and real-time distances between the tag and each anchor. The method comprises aligning the sensor signals to define aligned data. The method comprises calculating a predicted location of the UWB tag based on the aligned data and a least square of error to define a first constructed matrix and a second constructed matrix. The method comprises determining a local error of each of the at least four UWB anchors based on the least square of error and comparing each local error with an error threshold to define a first threshold high. The method comprises determining an erratic anchor based on the first threshold high.

Abstract: Disclosed is an approach for obtaining fingerprints that have been collected by at least one mobile device for supporting a positioning of other mobile devices, each fingerprint comprising at least results of measurements on radio signals of at least one communication node at a particular location, communication node names proximate to the particular location, and an area identifier for the particular location; receiving a positioning request that contains at least a multiset of communication node names; selecting a radio model, wherein the radio model selected is based at least in part on the fingerprint and/or the number of communication node names proximate to a fingerprint which match the node names in the positioning request that contains at least a multiset of communication node names; and generating data for a feedback for a user of the at least one computing device based on the selected radio model.

Abstract: Systems and methods are described for automated detection of border conflicts in physical radiofrequency (RF) communication network infrastructures. For example, proposed sector antennas in a greenfield physical network deployment may be licensed to radiate in certain spectrum blocks in the mapped licensed geographic regions (mLGR) where they are located, but the licenses may not permit radiated power in those spectrum blocks to cross into adjacent mLGRs. Embodiments compute radiation contours for the sector antennas indicating estimated local power levels computed based on antenna characteristics of the sector antennas and propagation model data that defines geographic morphologies for the mLGRs. The radiation contours are analyzed to detect any border conflict conditions where the estimated local power levels exceed defined threshold radiation levels in unlicensed regions. A culprit set of the sector antennas can be output to indicate those responsible for detected border conflict conditions.

Abstract: An apparatus obtains a set of radio data comprising signal strength related values for radio signals transmitted by a transmitter with an association of each signal strength related value with a representation of a geographical location. The apparatus applies a frequency transform to the obtained set of radio data to obtain transform coefficients, each transform coefficient comprising a transform index and an associated transform value. The apparatus selects a subset of transform indices having more significant transform values than the remaining transform indices and compresses the transform indices by encoding each transform index exploiting a probability of occurrence of an index value of a respective transform index. The same or another apparatus decodes the compressed transform indices again for use in position operations.

Abstract: A method for specifying an object, includes: determining whether a pointing device is in a pointing mode or a control mode; determining a first position of a first locator and a second position of a second locator in the pointing device in a virtual space, when the pointing device is in the pointing mode; determining a pointing of the pointing device based on the first position of the first locator and the second position of the second locator; and determining a specified virtual object based on the pointing of the pointing device.

Abstract: A window for an aircraft, the window including a first transparent layer, and a first plurality of light detectors arranged around a circumference of the first transparent layer to measure the intensity of light refracted upon entering and exiting the first transparent layer. An aircraft and a method for determining the point at which a laser beam impacts a window of the aircraft are disclosed.

Abstract: The disclosure relates to the field of radar sensors, particularly to radar sensors for radar sensing using wireless communication signals. The method includes: receiving a reflected communication signal, wherein the reflected communication signal is a sent communication signal that is reflected by at least one object. The frequency of the sent communication signal is within a radar frequency range, and the sent communication signal includes a sent data payload, and the reflected communication signal includes a corresponding reflected data payload. The reflected data payload is compared with the sent data payload, resulting in a compared data payload; and a delay information and/or a velocity information of the at least one object is extracted from the compared data payload.

Abstract: Transmission signal generation circuitry generates a transmission chirp, and the transmission chirp is transmitted from a transmission antenna. A reflected wave, from an object to be detected, of the transmission chirp transmitted from the transmission antenna is received by a reception antenna. A mixer mixes the transmission chirp and a reception chirp received by the reception antenna to generate an intermediate frequency signal. Signal processing circuitry obtains, for a plurality of respective analysis periods corresponding to different frequency bands of the transmission chirp, frequency spectral waveforms of the intermediate frequency signal, detects a peak appearing in the plurality of frequency spectral waveforms, and determines, based on variations in peak position among the plurality of frequency spectral waveforms, whether or not the peak is due to a valid object.

Abstract: A method for checking a functional capability of a distance sensor of a vehicle includes continuously receiving sensor data from the distance sensor, wherein the sensor data describe a sensor signal emitted by the distance sensor and reflected on at least one object in an environment of the vehicle; continuously determining distance values, which describe a distance between the distance sensor and the at least one object, on the basis of the sensor data; storing the distance values for a predetermined period of time; determining a current range of the distance sensor on the basis of the stored distance values; comparing the current range with a predetermined maximum range of the distance sensor; and checking the functional capability of the distance sensor on the basis of the comparison.

Abstract: The present disclosure provides a radar object recognition method, which includes steps as follows. The radar image generation is performed on radar data to generate a radar image; the radar image is inputted into an object recognition model, so that the object recognition model outputs a recognition result; the post-process is performed on the recognition result to eliminate recognition errors from the recognition result.

Abstract: Aspects presented herein may enable an entity that is receiving (or reading) reflected/backscattered signals from an IoT device to differentiate the reflected/backscattered signals from other reflections (e.g., noise or signals bounced from other objects). In one aspect, a wireless device transmits an indication of a positioning session to an IoT device, wherein the indication initiates the positioning session for the IoT device. The wireless device transmits, based on the positioning session, a set of PRSs to the IoT device via a plurality of transmission occasions. The wireless device receives, from the IoT device based on a reflection pattern, at least one PRS in the set of PRSs via at least one reception occasion.

Abstract: Embodiments of the disclosure provide a signal intelligence system for integrating radio frequency (RF) spectrum prediction with emitter classification and position, navigation, and timing (PNT). Methods of the disclosure include detecting a signal from an emitter operating within a wireless network. Continued processing includes forecasting, via a multi-task learning component of a machine learning module, one of a signal modulation, an emission protocol, and an identification of the emitter based on the detected signal. Additional processing includes calculating a positioning, navigation, and timing (PNT) profile for the emitter using a recurrent graph neural network (ReGNN) component of the machine learning module. Further processing includes predicting, via a recurrent neural network (RNN) of the machine learning module, a spectrum occupancy of the emitter within the wireless network.

Abstract: Disclosed herein are systems, methods, and computer program products for controlling a mobile platform. The methods comprise: obtaining loose-fit cuboids overlaid on 3D graphs so as to each encompass lidar data points associated with an object; defining an amodal cuboid based on the loose-fit cuboids; checking whether or not the object is static through a time period; identifying a center for the amodal cuboid based on the checking; and causing operations of the mobile platform to be controlled based on the amodal cuboid having the center which was identified.

Abstract: According to an embodiment of the present disclosure, a method of detecting an object around a vehicle includes clustering points obtained from a Light Detection and Ranging (LiDAR) sensor of the vehicle, determining a position of a threshold line corresponding to a rear of a first object based on object points of a cluster box generated according to the clustering, and generating a first bounding box of the first object and a second bounding box of a second object based on a distribution of the object points based on the position of the threshold line.

Abstract: A LIDAR system includes a first polygon scanner, a second polygon scanner, and an optic. The first polygon scanner includes a plurality of first facets around an axis of rotation. The second polygon scanner includes plurality of second facets that are outward from the plurality of first facets relative to the axis of rotation. The optic is inward from the first polygon scanner relative to the axis of rotation. The optic is configured to output a first beam to the first polygon scanner. The first polygon scanner is configured to refract the first beam to output a second beam to the second polygon scanner. The second polygon scanner is configured to refract the second beam to output a third beam.

Abstract: A structure of a silicon photonics device for LIDAR includes a first insulating structure and a second insulating structure disposed above one or more etched silicon structures overlying a substrate member. A metal layer is disposed above the first insulating structure without a prior deposition of a diffusion barrier and adhesion layer. A thin insulating structure is disposed above the second insulating structure. A first configuration of the metal layer, the first insulating structure and the one or more etched silicon structures forms a free-space coupler. A second configuration of the thin insulating structure above the second insulating structure forms an edge coupler.

Abstract: Resolution is improved while suppressing the number of light emitting elements disposed in an optical module.

Abstract: A lift device includes a base, a lift assembly coupled with the base, a platform coupled with the lift assembly, and an obstacle detection system that includes a first lidar sensor, a second lidar sensor, a third lidar sensor, and a fourth lidar sensor. The first lidar sensor is positioned at a first corner of a base of the platform. The second lidar sensor is positioned at a second corner of the base of the platform. The third lidar sensor is positioned at a third corner of the base of the platform. The fourth lidar sensor is positioned at a fourth corner of the base of the platform. The lidar sensors are oriented in a downwards direction to detect objects or obstacles that are at a vertical position below the base of the platform.

Abstract: This application discloses a LiDAR controlling method, the LiDAR includes a laser emission array and a laser receiving array, and the method includes: in a measurement cycle, determining at least one emission block to be turned on in a current measurement cycle from the laser emission array, where the laser emission array includes multiple emission blocks, and each emission block includes multiple emission units; controlling at least one emission block to emit a laser beam according to a preset rule; and controlling a receiving block in the laser receiving array that corresponds to the at least one emission block to receive a laser echo, where the laser echo refers to an echo formed after the laser beam is reflected by a target object.

Abstract: A laser projection module is disclosed, which comprises a laser source and a diffractive optical element, and has a first operating mode and a second operating mode. In the first operating mode, a laser beam from the laser source irradiates the diffractive optical element in a first incident state, and the diffractive optical element projects a first light field comprising a patterned light field. In the second operating mode, the laser beam from the laser source irradiates the diffractive optical element in a second incident state different from the first incident state, and the diffractive optical element projects a second light field comprising a uniform light field. The laser projection module with different operating modes of the present disclosure integrates function of projecting a patterned light field and that of projecting a uniform light field.

Abstract: The invention relates to a device for converting a photonic signal to be analyzed, comprising two output branches, one input for receiving a photonic signal to be analyzed and splitting off a part of the photonic signal to each output branch, the device imposing a phase shift of approximately 180 degrees between the two parts, each output branch including a photodiode generating a respective first electrical current, each output branch generating a second current according to a value of the first current of the branch considered, the device comprising an amplifier generating an output signal according to a difference between the values of the second currents, a gain being defined for each output branch, the device including at least one electronically controlled adjustment element apt to modify one of the gains.

Abstract: According to various embodiments, an optical arrangement (200) for a LIDAR system can have: a focusing arrangement (202) which is configured in such a way that it focuses light onto a focal point (214) of the focusing arrangement (202); a beam deflection component (204) arranged downstream of the focusing arrangement (202) at a first distance (216) from the focal point (214) of the focusing arrangement (202), wherein the beam deflection component (204) is configured to deflect the light at a deflection angle onto a field of view (220); and a collimating lens (206) arranged downstream of the beam deflection component (204) at a second distance (218) from the focal point (214) of the focusing arrangement (202), wherein the second distance (218) corresponds to a focal length of the collimating lens (206), and wherein the collimating lens (206) is configured to parallelize the light from the focal point (214).

Abstract: A measuring apparatus includes a light emitting element, a light receiving unit, a movable mirror, and a control unit. The light emitting element emits a pulsed light. The light receiving unit receives the reflected pulsed light. The movable mirror changes an emission direction of the pulsed light. The control unit controls a light emission intensity of the light emitting element. In the measuring apparatus, a reflecting surface of the movable mirror is oscillated in a sinusoidal waveform so that the emission direction of the pulsed light reciprocates back and forth in a first direction. The control unit emits the pulsed light having a higher intensity to an end part region including an end of a scanning range in the first direction than to a central region including a center of the scanning range in the first direction.

Abstract: A pixel includes a SPAD having a cathode connected to a first node and an anode coupled to a first negative voltage, and a transistor circuit coupled between a supply voltage and a third node, that turns on in response to an enable signal. A cascode transistor connected between the third node and the first node is controlled by a cascode control signal. A cathode setting capacitor is connected between the first node and ground. A readout inverter is coupled between the intermediate node and an output node and generates an output signal. Turn-on of the transistor circuit sources current from the supply voltage node to the cathode setting capacitor, setting a reverse bias voltage across the SPAD to greater than its breakdown voltage. A photon impinging upon the SPAD cause avalanche of the SPAD which, when occurring after turn off of the transistor circuit, discharges the cathode setting capacitor.

Abstract: A computing system may operate a LIDAR device to emit and detect light pulses in accordance with a time sequence including standard detection period(s) that establish a nominal detection range for the LIDAR device and extended detection period(s) having durations longer than those of the standard detection period(s). The system may then make a determination that the LIDAR detected return light pulse(s) during extended detection period(s) that correspond to particular emitted light pulse(s). Responsively, the computing system may determine that the detected return light pulse(s) have detection times relative to corresponding emission times of particular emitted light pulse(s) that are indicative of one or more ranges. Given this, the computing system may make a further determination of whether or not the one or more ranges indicate that an object is positioned outside of the nominal detection range, and may then engage in object detection in accordance with the further determination.

Abstract: A detection method for stain on a light cover of a LiDAR, including: transmitting a multi-pulse sequence with pulse coding; receiving an echo; obtaining an echo pulse sequence in the echo corresponding to the multi-pulse sequence; determining whether the light cover of the LiDAR has a stain based on a time of flight (TOF) of the echo pulse sequence. The present disclosure utilizes light beams generated by a transmitter unit of the LiDAR to detect a stain on the light cover, without the necessity to add an extra light source and/or detector device. The present disclosure provides a simple structure, which saves internal space of the LiDAR. In this application, the detection is completed by using the coded time, TOF and the number of echo points, and the detection accuracy is high and the misjudgment can be avoided.

Abstract: The present invention provides a dual-polarized Lidar receiving end based on an optical chip, including a module for receiving reflected light, a module for receiving local oscillator light, a plurality of frequency mixers, a plurality of detectors and a plurality of variable optical attenuators. The Lidar receiving end according to the present invention can receive and process two optical signals in an orthogonal polarization state. Compared with the existing Lidar design solution, a system on chip based on the optical chip according to the present invention implements monolithic integration of massive devices, and has the advantages of high stability, small volume and low weight and costs, and the like. It is relatively easy to increase a quantity of channels at the receiving end designed according to the present invention.