DISTRIBUTED SENSOR CALIBRATION AND SENSOR SHARING USING CELLULAR VEHICLE-TO-EVERYTHING (CV2X) COMMUNICATION

    公开(公告)号:US20210063546A1

    公开(公告)日:2021-03-04

    申请号:US16560205

    申请日:2019-09-04

    Abstract: Various aspects of the present disclosure generally relate to vehicle sensors. In some aspects, a device associated with a vehicle may obtain, from an external source, calibration data including a first set of measurements related to a position of one or more objects in a reference frame associated with the external source. The device may identify a second set of measurements related to the position of the one or more objects within a field of view of one or more onboard sensors, and update a calibration table based at least in part on a comparison of one or more of the first set of measurements and one or more of the second set of measurements that are most time-aligned. Accordingly, the device may convert sensor-derived location information from a source reference frame to a reference frame associated with the vehicle using the updated calibration table. Numerous other aspects are provided.

    TARGET GENERATION FOR SENSOR CALIBRATION

    公开(公告)号:US20210025995A1

    公开(公告)日:2021-01-28

    申请号:US16518758

    申请日:2019-07-22

    Abstract: Various aspects of the present disclosure generally relate to sensor targets. In some aspects, a method may include obtaining a detection resolution of a sensor that is to detect a target on a roadway; obtaining a designated speed limit of the roadway; estimating an exposure time of the target based on the detection resolution and the designated speed limit; determining, based on the exposure time, a target dimension of the target and a quantity of surface depths of the target; generating a code for the target based on the quantity of surface depths, wherein the code corresponds to a physical configuration of the target; and storing, in a mapping associated with the sensor, the code in association with the target to permit the target to be identified by the sensor. Numerous other aspects are provided.

    LIDAR SYSTEM WITH REFLECTED SIGNAL STRENGTH MEASUREMENT

    公开(公告)号:US20170090019A1

    公开(公告)日:2017-03-30

    申请号:US15230911

    申请日:2016-08-08

    Abstract: An example LIDAR system includes a detector, an amplifier, a time-to-digital converter (TDC), an integrator, an analog-to-digital converter (ADC), and a processor. The detector is configured to receive a reflected light pulse, where the reflected light pulse is reflected off of an object. The amplifier is coupled to the detector to generate an analog signal in response to the reflected light pulse. The TDC is coupled to the amplifier to generate a first time data and a second time data in response to the analog signal. The integrator is coupled to the amplifier to integrate the analog signal. The ADC is coupled to the integrator to sample an output of the integrator and to generate a digital sample. The processor is configured to process the first time data, the second time data, and the digital sample to estimate a total reflected energy of the reflected light pulse.

    TIMING SYNCHRONIZATION OF LIDAR SYSTEM TO REDUCE INTERFERENCE

    公开(公告)号:US20170082737A1

    公开(公告)日:2017-03-23

    申请号:US15263613

    申请日:2016-09-13

    CPC classification number: G01S7/497 G01S7/484 G01S17/023 G01S17/08

    Abstract: An example method for use with a LIDAR system includes assigning a firing time of a laser included in the LIDAR system. The assignment of the firing time includes: (i) receiving a universal clock signal at the LIDAR system, where the universal clock signal common to one or more other LIDAR systems; (ii) synchronizing a system clock of the LIDAR system to the universal clock signal to generate a synchronized clock signal; and determining the firing time based on the synchronized clock signal to reduce interference with the one or more other LIDAR systems. The method also includes firing the laser at the firing time.

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