Laser radar control method for correcting large-view-field optical distortion
A laser radar, optical distortion technology, applied in radio wave measurement systems, instruments and other directions, can solve the problems of the scanning spot and the detector target surface cannot be well aligned, the edge angle ranging performance is reduced, etc., to improve the ranging ability, Improve the effect of matching
Inactive Publication Date: 2021-11-02
苏州光之矩光电科技有限公司
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Problems solved by technology
For the above-mentioned line-scan area laser radar system, when the scanning angle is large, the scanning spot and the detector target surface cannot be well aligned, which will lead to a technical problem that the ranging performance of the edge angle is greatly reduced. The present invention proposes a correction LiDAR control method for large field of view optical distortion
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[0027] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.
[0028] Embodiments of the present patent are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are only used for explaining the patent, and should not be construed as limiting the patent.
[0029] In the description of this patent, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this patent and simplifying the des...
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The invention belongs to the technical field of laser radars, and particularly relates to a laser radar control method for correcting large-view-field optical distortion, which comprises an ideal optical system and an actual-condition laser radar receiving and transmitting system, and comprises the following steps: S1, detecting a large-view-field laser radar receiving system based on an area array detector, wherein due to optical distortion, compared with an ideal optical system, the view field angle corresponding to the sub-pixel at the edge of the view field becomes larger, and the view field angle corresponding to the sub-pixel at the center of the view field becomes smaller; S2, determining an optical distortion amount of a unit field angle according to optical simulation; and S3, when the laser scans the set area, starting a specific sub-pixel of the area array detector to be matched with the set area. According to the invention, by changing the control time sequence of the receiving unit, the mismatching phenomenon of the light spot and the detector caused by optical distortion is compensated, so that the distance measuring capability of the laser radar system is improved.
Description
technical field [0001] The invention relates to the technical field of laser radar, in particular to a laser radar control method for correcting optical distortion of a large field of view. Background technique [0002] LiDAR (Light detection and ranging, LiDAR) is a three-dimensional imaging system that actively emits laser beams to detect target echoes, and is the core device for achieving L3 and above autonomous driving. Compared with millimeter-wave radar, camera, ultrasonic radar, etc., lidar has centimeter-level distance resolution and measurement accuracy, and supports high-precision obstacle recognition, lane line detection, road edge detection and other functions. In recent years, with the vigorous development of lasers, detectors, chips and other related industries, lidar has gradually got rid of the high cost problem that has been criticized, and this solution has been more widely used in smart cars. [0003] The working methods of lidar mainly include time of fl...
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IPC IPC(8): G01S7/497
CPCG01S7/497
Inventor 胡伟圣杜秉成
Owner 苏州光之矩光电科技有限公司