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1. 发明公开

US20240385297A1 AVALANCHE DIODE BASED DETECTION DEVICE FOR CALCULATING TIME-OF-FLIGHT 审中-公开
公开(公告)号：US20240385297A1
公开(公告)日：2024-11-21
申请号：US18787398
申请日：2024-07-29
申请人： PixArt Imaging Inc.
发明人： TSO-SHENG TSAI
IPC分类号： G01S7/487 , G01S7/4865 , G01S17/04
CPC分类号： G01S7/487 , G01S7/4865 , G01S17/04
摘要： There is provided a detection device including a light source, an avalanche diode, a first counter, a second counter and a processor. The light source emits light within a first interval, and is turned off within a second interval, a third interval and a fourth interval. The avalanche diode detects photons corresponding to the first interval, second, third and fourth intervals to trigger avalanche events. The first counter performs up-counting on the avalanche events in the first interval and performs down-counting on the avalanche events in the third interval to generate a first count value. The second counter performs up-counting on the avalanche events in the second interval and performs down-counting on the avalanche events in the fourth interval to generate a second count value. The processor calculates a time-of-flight according to the first count value and the second count value.

2. 发明授权

US12105188B2 Radar power control method and apparatus 有权
公开(公告)号：US12105188B2
公开(公告)日：2024-10-01
申请号：US17484462
申请日：2021-09-24
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Pengfei Luo , Tong Jiang
IPC分类号： G01S13/86 , G01S7/292 , G01S7/40 , G01S7/487 , G01S13/931 , G01S17/931
CPC分类号： G01S13/865 , G01S7/292 , G01S7/40 , G01S7/487 , G01S13/931 , G01S17/931
摘要： A radar power control method and an apparatus are provided. The method includes: emitting a first detection signal at a target emission angle; obtaining a reflectivity of a first detection point of the first detection signal if signal power of an echo signal of the first detection signal is less than a preset power threshold, where the first detection point is a point on a surface of a detected object in a direction of the target emission angle; and increasing emission power corresponding to the target emission angle if the reflectivity of the first detection point is greater than a preset first threshold. The solution helps consider both power consumption and a detection distance of a radar.

3. 发明公开

US20240248182A1 METHOD OF DETECTING AND CORRECTING MULTI-PATH INTERFERENCE COMPONENT IN TOF CAMERA 审中-公开
公开(公告)号：US20240248182A1
公开(公告)日：2024-07-25
申请号：US18532875
申请日：2023-12-07
申请人： SK hynix Inc. , KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
发明人： Min Hyuk KIM , Daniel S. Jeon
IPC分类号： G01S7/487 , G01S7/4865 , G01S17/894
CPC分类号： G01S7/487 , G01S7/4866 , G01S17/894
摘要： Detecting a multi-path interference component in a time-of-flight (ToF) camera may be performed by generating a confidence map in which a distortion area attributable to a multi-path interference component included in a reflection modulation signals is specified, where the reflection modulation signals is generated when two modulation signals emitted from a light source to a subject return to the ToF camera after being reflected by the subject. Correcting the multi-path interference component corrects distortion attributable to a multi-path interference component, which may include correcting only the distortion area specified in the confidence map. Detecting the multi-path interference component in a ToF camera includes collecting the reflection modulation signal at a plurality of different times, calculating amplitudes and offsets of the collected reflection modulation signals, determining whether a multi-path interference component is included in the reflection modulation signal, and generating the confidence map.

4. 发明授权

US12025700B2 System and method for determining ranges to a target behind a transparent surface 有权
公开(公告)号：US12025700B2
公开(公告)日：2024-07-02
申请号：US17007049
申请日：2020-08-31
申请人： Aeva, Inc.
发明人： Humayun Chaudhry , Christopher Thompson
IPC分类号： G01C3/08 , G01S7/487 , G01S17/08
CPC分类号： G01S17/08 , G01S7/487
摘要： Systems and methods for determining ranges to a target disposed behind a transparent surface are described. A target acquisition system receives a plurality of lidar returns, at least some of which are from a target and at least some of which are from a transparent surface. The lidar returns correspond to a portion of a lidar signal generated by a lidar, directed toward the target, and reflected back to the lidar from either the target or the transparent surface. A range measurement for each of the plurality of lidar returns is determined. The target acquisition system generates a histogram of the range measurements. The histogram includes an array including a plurality of range bins. Each range bin defines a unique portion of a predetermined distance out from the lidar. The histogram further includes a count associated with each respective range bin. The count corresponds to a number of range measurements falling within the unique portion of the predetermined distance corresponding to that respective range bin. In some implementations of the invention, the target acquisition system determines which of the range measurements correspond to the target based on the histogram. In some implementations of the invention, the target acquisition system determines which of the range measurements correspond to the transparent surface based on the histogram.

5. 发明授权

US12019191B2 Method for identifying a change of a range of a lidar sensor 有权
公开(公告)号：US12019191B2
公开(公告)日：2024-06-25
申请号：US18034962
申请日：2021-07-28
申请人： MERCEDES-BENZ GROUP AG
发明人： Philipp Schindler , Andreas Scharf
IPC分类号： G01C3/08 , G01S7/487 , G01S7/497 , G01S17/931
CPC分类号： G01S7/487 , G01S7/497 , G01S17/931
摘要： A method for identifying a change of a range of a lidar sensor involves a lidar sensor receiving a reference noise level of infrared radiation. A signal-to-noise ratio of infrared radiation reflected on the reference target and received by the lidar sensor are identified in a reference measurement having a reference target located at a predetermined distance to the lidar sensor. In a driving operation measurement, a current noise level of received infrared radiation is identified and a theoretical distance to a position where the reference target ought to be if, at the current noise level, the same signal-to-noise ratio applies as in the reference measurement is identified from the current noise level. A change in range calculation identifies a difference between the predetermined distance and the theoretical distance. The difference corresponds to the change of the range of the lidar sensor compared to its range during the reference measurement.

6. 发明公开

US20240142584A1 LIDAR TIME-OF-FLIGHT SIGNAL PROCESSING 审中-公开
公开(公告)号：US20240142584A1
公开(公告)日：2024-05-02
申请号：US18262845
申请日：2021-12-20
申请人： OSRAM GmbH
发明人： Gerhard Maierbacher , Florian Kolb , Martin Schnarrenberger
IPC分类号： G01S7/4865 , G01S7/4861 , G01S7/487
CPC分类号： G01S7/4865 , G01S7/4861 , G01S7/487
摘要： In embodiments a detection system includes a detector configured to provide a received signal and a processing circuit configured to provide a plurality of quantized signals, each quantized signal being associated with a respective threshold level, and each quantized signal being representative of portions of the received signal in which a signal level of the received signal is greater than the respective threshold level and to provide an encoded signal based on the plurality of quantized signals, the encoded signal including a first plurality of first encoded signal values being representative of the portions of the received signal in which the signal level of the received signal becomes greater than one of the threshold levels, and a second plurality of second encoded signal values being representative of the portions of the received signal in which the signal level of the received signal becomes less than one of the threshold levels.

7. 发明公开

US20240118422A1 SENSOR DEVICE FOR IMAGING 审中-公开
公开(公告)号：US20240118422A1
公开(公告)日：2024-04-11
申请号：US18275208
申请日：2022-02-01
申请人： The University Court of the University of Edinburgh
发明人： Michael DAVIES , Julian Andrés TACHELLA , Michael P. SHEEHAN
IPC分类号： G01S17/894 , G01S7/4865 , G01S7/487 , G01S17/10
CPC分类号： G01S17/894 , G01S7/4866 , G01S7/487 , G01S17/10
摘要： A sensor device (10) for photon-based imaging comprising one or more photon detectors configured to produce a plurality of photon detection signals in response to a plurality of photon detection events, wherein each photon detection event has a corresponding detection time and wherein the detection times of the plurality of photon detection events are distributed in accordance with a distribution over time; and processing circuitry configured to perform a sketching process using timing information of the plurality of photon detection events to obtain a compressed representation of the distribution over time, wherein the sketching process comprises: generating a plurality of feature values based on the timing information of the plurality of photon detection events using one or more feature functions; combining the generated plurality of feature values to obtain the compressed representation of the distribution over time, wherein the feature functions have one or more properties such that combining the plurality of feature values generated using the one or more feature functions preserves signal information and/or supresses background information and/or distinguishes signal information from background information in the compressed representation, wherein the compressed representation is such that at least one or more desired parameters of the distribution over time can be estimated by performing a parameter estimation process using the compressed representation, wherein the parameter estimation process is based on a model of the distribution over time.

8. 发明公开

US20240111033A1 PHOTODETECTION DEVICE AND PHOTODETECTION SYSTEM 审中-公开
公开(公告)号：US20240111033A1
公开(公告)日：2024-04-04
申请号：US18249387
申请日：2021-09-02
申请人： SONY SEMICONDUCTOR SOLUTIONS CORPORATION
发明人： YASUJI IKEDA
IPC分类号： G01S7/4863 , G01S7/481 , G01S7/487
CPC分类号： G01S7/4863 , G01S7/4816 , G01S7/487
摘要： A photodetection device according to the present disclosure includes a plurality of light-receiving sections that each generates a pulse signal including a pulse corresponding to a result of light reception, a plurality of edge detectors that each generates a detection signal by detecting an edge of the pulse in the pulse signal generated by a corresponding light-receiving section, and an adder that generates a detection value indicating number of the pulses on the basis of a plurality of the detection signals. The edge detectors each include a first latch circuit that generates a first signal by latching the pulse signal on the basis of a first clock signal, a second latch circuit that generates a second signal by latching the first signal on the basis of a second clock signal that is an inverted signal of the first clock signal, a combination circuit that generates a third signal on the basis of the pulse signal, the first signal, and the second signal, and a third latch circuit that generates the detection signal by latching the third signal on the basis of the first clock signal.

9. 发明公开

US20240061091A1 METHOD FOR MEASURING REFLECTIVITY OF TARGET OBJECT BY USING LIDAR, AND LIDAR 审中-公开
公开(公告)号：US20240061091A1
公开(公告)日：2024-02-22
申请号：US18496078
申请日：2023-10-27
申请人： HESAI TECHNOLOGY CO., LTD.
发明人： Tianjian HU , Jie CHEN , Jie KUANG , Li LI , Yanfang LI , Yizun WANG , Shaoqing XIANG
IPC分类号： G01S7/487 , G01S7/481 , G01S17/10 , G01S7/4865
CPC分类号： G01S7/487 , G01S7/4816 , G01S17/10 , G01S7/4865
摘要： Methods and apparatuses for measuring reflectivity of a target object by using laser radar (LIDAR) are provided. In an implementation, a method comprising: a detector of the LIDAR receives an echo of a detection beam reflected by a target object, and converts the echo into an electrical signal to obtain an echo photocurrent integral. The reflectivity of the target object is determined based on a predetermined reflectivity calibration curve and a photocurrent integral of the echo.

10. 发明公开

US20240045038A1 Noise Adaptive Solid-State LIDAR System 审中-公开
公开(公告)号：US20240045038A1
公开(公告)日：2024-02-08
申请号：US18488293
申请日：2023-10-17
申请人： OPSYS Tech Ltd.
发明人： Mark J. Donovan
IPC分类号： G01S7/486 , G01S7/487 , G01S7/4863 , G01S17/42 , G01S7/481 , G01S17/931
CPC分类号： G01S7/4868 , G01S7/4876 , G01S7/4863 , G01S17/42 , G01S7/487 , G01S7/4815 , G01S17/931
摘要： A light detection and ranging (LIDAR) system includes an optical transmitter comprising a plurality of lasers, where each of the plurality of lasers illuminates a field-of-view. A transmitter controller is configured to pulse desired ones of the plurality of lasers so that the plurality of lasers generate light in a desired illumination region. An optical receiver comprises a plurality of detectors positioned to detect light over the desired illumination region. The plurality of detectors generates an electrical detection signal. A time-of-flight measurement circuit measures the time-of-flight of light from the plurality of lasers to the plurality of detectors. The optical receiver calculates range information from the time-of-flight measurements. A receiver controller is electrically connected to the transmitter controller and is configured to bias at least some of the plurality of detectors at a bias point that achieves a desired detection signal noise level.

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