Abstract: A lidar, and an anti-interference method therefor, may modulate a transmitting time of the lidar by injecting random time jitter at a time interval in a sequence of the transmitting time, and cause the lidar to transmit a laser pulse according to a modulated transmitting time. When an echo received by the lidar includes an expected echo of the local lidar and an unexpected echo from other lidars, because the transmitting time and the expected receiving time of the echo are correlated, injecting random time jitter in the transmitting time of the lidar may disrupt the correlation between the transmitting time of the local lidar and the transmitting time of other lidars. Thus, when a plurality of lasers are used together in one scenario and cause crosstalk, the anti-interference method for the lidar above can be used to fight against crosstalk to some extent.

Abstract: This application provides a laser detection method and device, applied to LiDAR. The LiDAR includes a first emitting unit, and the laser detection method includes: obtaining a random variable; determining a plurality of first emission times according to the random variable; and controlling the first emitting unit to emit a laser signal at the plurality of first emission times.

Abstract: This application discloses a LiDAR and a mobile device, where LiDAR includes a lens and a photonic chip, an optical axis of the lens extends along a first preset direction; the photonic chip and the lens are spaced apart along the first preset direction, the photonic chip includes a cladding layer and multiple receiving waveguide core layers, all the receiving waveguide core layers are located at an end of the cladding layer that is closer to the lens and are spaced apart along a second preset direction, each receiving waveguide core layer has a first end surface and a second end surface opposite to each other, the first end surface is closer to the lens than the second end surface; and there is a distance between a first end surface of at least one receiving waveguide core layer and a focal plane of the lens.

Abstract: The embodiments of the present application disclose a laser detection device. The laser detection device includes a laser emitter, a laser detector, and a laser echo signal processing circuitry. The laser emitter emits a laser to the target object. The laser detector receives an echo signal reflected by the target object. The laser echo signal processing circuitry samples the echo signal. The laser echo signal processing circuitry includes a controller, a time digital converter, and a dynamic threshold value generation circuit. The controller outputs a digital signal to the dynamic threshold value generation circuit. The dynamic threshold value generation circuit generates at least two analog threshold signals to the time digital converter. The time digital converter samples the echo signal based on the threshold signals.

Abstract: A LiDAR range and speed measurement method and a LiDAR, are disclosed. Through the technical solution provided by the embodiment of the present application, it is possible to determine whether Doppler aliasing occurs based on a first local oscillator signal generated by a first laser and a second local oscillator signal generated by a second laser, the first local oscillator signal including multiple segments of first continuous wave signals, the second local oscillator signal including multiple segments of second continuous wave signals, the second continuous wave signal including a first swept frequency signal and a first constant frequency signal. In the event of Doppler aliasing, a first algorithm is used to calculate the distance and/or speed of the target object relative to the LiDAR, thereby improving the accuracy of the LiDAR ranging and speed measurement.

Abstract: An embodiment of this application discloses a laser emitting circuit and a LiDAR, and belongs to the field of the LiDAR. The structure of the laser emitting circuit is changed so that for the laser emitting circuit in an energy transfer stage, the energy transfer current from an energy storage element does not pass through a laser diode, and the laser diode is in a reverse-biased state relative to the energy transfer current. Therefore, the parasitic capacitance of an energy releasing switch element does not cause the laser diode to emit light in advance during an energy transfer charging process, which prevents the laser diode from emitting light at an unanticipated time, thereby solving the problem of laser leakage.

Abstract: Embodiments of the present application provide a laser ranging method, device, and a LiDAR. The method includes: obtaining the quantity of light leading point cloud points in a first preset region in the current frame of point cloud, where the light leading point cloud points are point cloud points corresponding to echoes received by a receiver within a light leading period, and the light leading period is a period less than a first preset duration, starting from an emission moment of a laser beam corresponding to the light leading point cloud points; and adjusting the gain of the receiver within the light leading period to reduce the quantity of the light leading point cloud points.

Abstract: The present application provides a point cloud filling method, device, equipment, and storage medium. The method includes: obtaining the point cloud data collected by the LiDAR and determining the point missing pixel position from the point cloud data; obtaining the point filling mark of the point missing pixel position; determining the point missing pixel position as the point filling pixel position; performing point cloud filling on the point filling pixel position according to the point filling mark. In this way, can effectively improve the accuracy of point cloud filling, maintain the edge features of the object being measured in the field of view, and not cause contour deformation of the object being measured due to point cloud filling, thereby improving the accuracy of LiDAR recognition.

Abstract: Embodiments of the present application disclose a photonic chip, a LiDAR, and a mobile device. The photonic chip has a substrate, a cladding layer, a first coupler, a first beam splitter, an emitting waveguide module, and a first optical adjusting monitoring module. The first beam splitter includes a first port, a second port, a third port, and a fourth port. The first beam splitter is configured to output the optical signal input through the first port through the third port and the fourth port, and to output the optical signal input through the third port through the first port and the second port. The first optical adjusting monitoring module includes a first photodetector. Monitors the optical power of the return light received by the emitting waveguide module through the first optical adjusting monitoring module integrated on the photonic chip, making the process more time-saving and labor-saving.

Abstract: The embodiments of the present application disclose a LiDAR receiving control method, device, and LiDAR. The method first determines the echo characteristic value of the echo signals in the response period, then determines the baseline voltage fluctuation based on the echo characteristic value, next determines the target sampling threshold, and finally adjusts the threshold of the next response period according to the target sampling threshold. This receiving control method compensates for the sampling threshold, obtaining a compensated target sampling threshold, achieving accurate sampling of the echo signals, and improving ranging performance. This receiving control method adjusts the sampling threshold in real-time based on the impact of the received echo signals on the baseline voltage.

Abstract: This application provides a parameter configuration method, device, and non-transitory computer-readable storage medium. In this method, the receiving units in the LiDAR receiving array are grouped according to a preset rule. Then, based on the detection requirements, the measurement range corresponding to each group of receiving units is set. Based on the measurement range of each group of receiving units, the storage space for each group of receiving units is set. The storage space is used to store the measurement data of each group of receiving units. Thus, the method reduces the acquisition of measurement data by some receiving units in unnecessary measurement ranges, decreases the volume of measurement data, and saves storage space.

Abstract: The present application provides a galvanometer motor and a LiDAR. The galvanometer motor includes a rotor assembly, a fixing structure, and an angular position sensor. The rotor assembly includes a shell, a rotating shaft, and a magnetic pole. The fixing structure includes a stator assembly, a mounting sleeve, and a base. The mounting sleeve is partially located inside the shell and partially extends to the outside of the shell through an opening. The mounting sleeve is movably socketed with the rotating shaft. The stator assembly is mounted on the outside of the mounting sleeve inside the shell. The stator assembly is used to generate a rotating magnetic field for driving the magnetic pole to rotate.

Abstract: The present disclosure provides a LiDAR device and its ranging adjustment method. The ranging adjustment method involves first calibrating the echo intensities at different pixel positions in receiving units of the LiDAR device and then determining the corresponding correction coefficients. Based on these correction coefficients, the method corrects the intensity data output by the pixels at different positions, ensuring consistency in the intensity data output by the corresponding pixels of the same receiving unit.

Abstract: The present application discloses a LiDAR controlling method and device, an electronic apparatus, and a storage medium. The method includes: in a measurement period, determining an emitting group to be started in the measurement period from a laser emitting array, where the emitting group includes at least two emitting units, and physical positions of the at least two emitting units meet a condition of no optical crosstalk; controlling the at least two emitting units to emit laser beams asynchronously based on a preset rule; controlling a receiving unit group of the laser receiving array corresponding to the emitting group to receive laser echoes, where the laser echoes refer to echoes formed after the laser beams are reflected by a target object; and when at least two emitting groups are determined in the measurement period, controlling the emitting groups to emit the laser beams asynchronously based on the preset rule.

Abstract: A radar ranging method, device, electronic device, and computer-readable storage medium are provided. The radar ranging method includes: obtaining a plurality of measurement data sets by sampling at least one echo signal based on a plurality of thresholds in a measurement period, wherein the echo signal is sampled based on one threshold to obtain one measurement data set, and each measurement data set includes at least one measurement data; determining M backup data and N auxiliary data in the plurality of measurement data sets, and obtaining a total composite degree of each backup data; determining target data from the M backup data, based on the total composite degree; and determining a measurement distance based on the target data. The radar ranging method enhances the dynamic range of a LiDAR system, improves the measurement accuracy of the LiDAR and reduces the short-distance detection blind zone of the LiDAR.

Abstract: Embodiments of this application disclose a method, device, storage medium, and LiDAR for LiDAR detection. The method includes: obtaining point cloud data corresponding to an i?1th ground line and point cloud data corresponding to an i?2th ground line; calculating a predicted height range of the ith ground line based on the point cloud data corresponding to the i?1th ground line and the point cloud data corresponding to the i?2th ground line; detecting a scanning points on the ith row of the scanning line based on the predicted height range to determine a target point in the scanning points; and obtaining the ith ground line based on the target point.

Abstract: Embodiments of the present application disclose a photonic chip module, a LiDAR and a movable device. The photonic chip module includes a photonic chip and a reflection module. The photonic chip includes a plurality of transceiving waveguide modules. A plurality of accommodating grooves are provided on a first surface of the photonic chip. The reflection module has a plurality of reflecting surfaces, and each reflecting surface is arranged at intervals along the second preset direction. The reflection surface is used to reflect the detection light so that the detection light is emitted in a direction that is not perpendicular to the thickness direction. The photonic chip module is conducive to improving the detection field of view of the LiDAR under the condition of the same resolution, or improving the resolution under the condition of the same total detection field of view.

Abstract: This disclosure provides a method for nonlinearly calibrating linear frequency modulation of an optical signal, an apparatus for nonlinearly calibrating linear frequency modulation of an optical signal, a computer-readable storage medium, and an electronic device. The method includes: in an ith frequency modulation cycle, obtaining a relationship between a modulation voltage signal Vi(t) input into a light source and an actual frequency signal fi(t) of an optical signal output by the light source, to obtain an actual association relationship fi(V) corresponding to the ith frequency modulation cycle, where i is a positive integer; based on a target frequency modulation signal fg(t) and the actual association relationship fi(V), determining a modulation voltage signal Vj(t) corresponding to a jth frequency modulation cycle, where j is i+1; and inputting a modulation voltage signal Vj(t) into the light source, to implement frequency modulation of the optical signal in the jth frequency modulation cycle.

Abstract: A silicon photonic chip, a LiDAR, and a mobile device are disclosed. The silicon photonic chip includes a cladding, a transceiving waveguide module, a first photoelectric detection module, and a first polarization rotator. An emitting waveguide of the transceiving waveguide module extends along a first direction and is configured to transmit and emit a detection light, and the first receiving waveguide of the transceiving waveguide module is arranged at intervals along a second direction from the emitting waveguide and is configured to receive and transmit an echo light. The first photoelectric detection module is configured to receive a first local oscillator light and the echo light output by the first receiving waveguide. The first polarization rotator is disposed upstream of the first photoelectric detection module.

Abstract: This application pertains to the field of radar technology and provides a radar control method, device, terminal equipment, and computer-readable storage medium. The radar control method includes: determining a target receiving channel; adjusting an emitting channel grouping according to the target receiving channel, where the emitting channel corresponding to the target receiving channel and the emitting channel corresponding to the non-target receiving channel are in different emitting channel groupings; and controlling the emitting channels to re-emit the detection signals according to the adjusted emitting channel grouping.