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公开(公告)号：US20230400558A1
公开(公告)日：2023-12-14
申请号：US18235877
申请日：2023-08-20
发明人： Shen JIANG
IPC分类号： G01S7/4861 , G01S7/487 , G01S7/489 , G01S17/10
CPC分类号： G01S7/4861 , G01S7/487 , G01S7/489 , G01S17/10
摘要： The present application provides a lidar receiving apparatus, a lidar system, a laser ranging method, a laser ranging controller, and a computer readable storage medium. The lidar receiving apparatus includes: a photodetector, which is configured to receive a reflected laser signal and to convert the reflected laser signal into a current signal when a bias voltage of the photodetector is greater than a breakdown voltage of the same; a ranging circuit, which is connected with the photodetector and configured to calculate distance data according to the current signal; and a power control circuit, which is connected with the photodetector and configured to control the bias voltage applied to the photodetector according to a predefined rule.
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公开(公告)号：US20230314572A1
公开(公告)日：2023-10-05
申请号：US18019699
申请日：2021-08-18
IPC分类号： G01S7/4863 , G01S7/4865 , G01S17/10 , G01S7/481 , G01S7/489
CPC分类号： G01S7/4863 , G01S7/4817 , G01S7/4865 , G01S7/489 , G01S17/10
摘要： A photoelectric sensor includes: a first signal processing chain including a first amplifier configured to amplify an output signal from a preamplifier by a first amplification factor A1 and a first binarization circuit configured to binarize an output signal from the first amplifier by a first threshold Vthl; and a second signal processing chain including a second amplifier configured to amplify an output signal from the preamplifier by a second amplification factor A2 and a second binarization circuit configured to binarize an output signal from the second amplifier by a second threshold Vth2. The first threshold and the second threshold, and the first amplification factor and the second amplification factor satisfy the following relational expression: 1
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公开(公告)号：US20230213652A1
公开(公告)日：2023-07-06
申请号：US17746543
申请日：2022-05-17
发明人： Tatsuhiro OTSUKA , Kyunghyun SON
IPC分类号： G01S17/42 , G01S17/931 , G01S7/4865 , G01S17/894 , G01S7/484 , G01S7/489
CPC分类号： G01S17/42 , G01S17/931 , G01S7/4865 , G01S17/894 , G01S7/484 , G01S7/489
摘要： A light detection and ranging (LiDAR) device and an operating method thereof include irradiating a laser light toward an object; outputting a laser reflection light signal by detecting the laser light reflected from the object; measuring a pulse width corresponding to a period in which the laser reflection light signal is saturated from the laser reflection light signal and changing at least one of a laser light intensity to be irradiated by the laser light irradiator or a gain of an amplifier according to the analyzed pulse width; and controlling the laser light irradiator to irradiate an adjusted laser light corresponding to the changing.
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公开(公告)号：US20220113380A1
公开(公告)日：2022-04-14
申请号：US17070765
申请日：2020-10-14
申请人： Argo Al, LLC
IPC分类号： G01S7/489 , G01S7/4863
摘要： Systems, methods, and computer-readable media are disclosed for multi-detector LIDAR and methods. An example method may include emitting, by a light emitter of a LIDAR system, a first light pulse. The example method may also include activating a first light detector of the LIDAR system at a first time, the first time corresponding a time when return light corresponding to the first light pulse would be within a first field of view of the first light detector. The example method may also include activating a second light detector of the LIDAR system at a second time, the second time corresponding a time when return light corresponding to the first light pulse would be within a second field of view of the second light detector, wherein the first light detector is configured to include the first field of view, the first field of view being associated with a first range from the light emitter, and wherein the second light detector configured to include the second field of view, the second field of view being associated with a second range from the light emitter.
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公开(公告)号：US20210356566A1
公开(公告)日：2021-11-18
申请号：US16874935
申请日：2020-05-15
发明人： Chao Wang , Lingkai Kong , Yonghong Guo , Wenbin Zhu
IPC分类号： G01S7/4863 , G01S7/489
摘要： Embodiments of the disclosure provide a receiver in an optical sensing system. The exemplary receiver includes a movable detector configured to receive optical signals reflected or scattered from an object scanned by the optical sensing system. The receiver further includes an actuator configured to move the movable detector. The receiver also includes a controller configured to determine a plurality of target positions of the movable detector for receiving the optical signals. The controller is further configured to control the actuator to move the movable detector to the plurality target positions according to a movement pattern.
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公开(公告)号：US11163044B2
公开(公告)日：2021-11-02
申请号：US15994159
申请日：2018-05-31
申请人： Robert Bosch GmbH
IPC分类号： G01S7/486 , G01S7/481 , G01S7/499 , G01S7/489 , G01S17/931
摘要： A lidar system comprising a laser light source for emitting laser light, a light modulator unit, and a detector, the laser light emitted by the laser light source and reflected by an object being directed first through the light modulator unit and thereupon onto the detector, and the light modulator unit being designed to modify over time a light output that strikes the detector.
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公开(公告)号：US10816646B2
公开(公告)日：2020-10-27
申请号：US15623944
申请日：2017-06-15
申请人： Trimble AB
摘要： A distance measurement instrument and a method of operating a distance measurement instrument are disclosed. According to some embodiments, a transmit light signal is transmitted by a transmitter unit along a transmit path at an emission time and a return light signal is received by a receiver unit at a receive time along a receive path. The return light signal is converted to a return electrical signal. At least one of the transmit path and the receive path is deflected by a deflection module at a deflection angle relative to an optical axis of the instrument. A time-dependent attenuation function is selected based on information relative to the deflection angle and attenuation is applied by an attenuator to at least one of the return light signal and the return electrical signal according to the selected time-dependent function. A measured distance may be determined by a processor unit based on at least the emission time and the receive time.
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公开(公告)号：US20200271763A1
公开(公告)日：2020-08-27
申请号：US16283739
申请日：2019-02-23
发明人： Zhenghan Zhu , Yue Lu , John Wu
摘要： A system and method for correcting a Light Detection And Ranging (LiDAR) return signal is disclosed. The LiDAR return signal is digitized by a converter. An exemplary signal correction system includes a signal processor configured to identify saturated samples from the LiDAR return signal, determine a correction parameter based on non-saturated samples in the LiDAR return signal and corresponding samples in a reference signal, and correct the saturated samples in the LiDAR return signal using the correction parameter.
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公开(公告)号：US20200018834A1
公开(公告)日：2020-01-16
申请号：US16031084
申请日：2018-07-10
发明人： Frederic Boutaud
摘要： A time of flight (TOF) sensor device employs a measuring sequence that facilitates accurate distance measurement across a high dynamic range. In one or more embodiments, for a given measuring sequence in which a distance of an object or surface corresponding to a pixel is to be determined, the TOF sensor device performs multiple iterations of a measuring cycle, whereby for each successive iteration the number of emitted and measured pulses that are accumulated for the iteration is increased relative to the previous iteration of the measuring cycle. In this way, multiple values of increasing resolution are measured for the same physical entity over a corresponding number of measuring cycles. The sensor then selects a value from the multiple measured values that yields the highest resolution without saturating the pixel, and this value is used to determine the pulse propagation time and object distance.
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公开(公告)号：US10139478B2
公开(公告)日：2018-11-27
申请号：US15861147
申请日：2018-01-03
发明人： Stephen D. Gaalema , Austin K. Russell , Joseph G. LaChapelle , Scott R. Campbell , Jason M. Eichenholz , Tue Tran
摘要： To decrease the likelihood of a false detection when detecting light from light pulses scattered by remote targets in a lidar system, a receiver in the lidar system includes a photodetector and a pulse-detection circuit having a gain circuit with a varying amount of gain over time. The gain circuit operates in a low-gain mode for a time period T1 beginning with time t0 when a light pulse is emitted to prevent the receiver from detecting return light pulses during the threshold time period T1. Upon expiration of the threshold time period T1, the gain circuit operates in a high-gain mode to begin detecting return light pulses until a subsequent light pulse is emitted.
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