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Laser radar calibration method and laser radar

A calibration method, laser radar technology, applied in the field of laser detection, to achieve the effect of improving ranging performance and calibration accuracy

Pending Publication Date: 2022-03-01
HESAI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

LiDAR calibration mainly has the following problems: one is the selection of calibration references, and the other is the design of calibration methods

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  • Laser radar calibration method and laser radar
  • Laser radar calibration method and laser radar
  • Laser radar calibration method and laser radar

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Embodiment Construction

[0049] In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive.

[0050] In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orie...

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Abstract

The invention provides a calibration method for a laser radar. The calibration method comprises the following steps: transmitting a detection pulse to a target object; receiving an echo pulse after the target object reflects the detection pulse; obtaining distance information of a target object according to the detection pulse and the echo pulse; obtaining a calibration reference quantity of the echo pulse, wherein the calibration reference quantity is based on the intensity change of the echo pulse; and according to the calibration reference quantity, the obtained distance information is calibrated, and by using the calibration method to calibrate the flight time of the laser radar, the ranging performance of the laser radar can be improved, and the calibration precision is also obviously improved.

Description

technical field [0001] The invention relates to the field of laser detection, in particular to a laser radar calibration method and a laser radar using the calibration method. Background technique [0002] Lidar is a device that uses optical methods to measure distance accurately, and can be used in obstacle monitoring, geological modeling, position acquisition, robots, unmanned vehicles and other fields. Calculate the target distance by measuring the time-of-flight of the emitted beam through the target object and return to the lidar, and cover different orientations in the three-dimensional space by scanning means to obtain point cloud data and perceive the surrounding environment. Time of flight (TOF) calibration is very important for LiDAR to achieve accurate ranging, and it together with hardware design determines the distance measurement performance and ranging accuracy of LiDAR and other important indicators. LiDAR calibration mainly has the following problems: one i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497G01S17/48
CPCG01S7/497G01S17/48
Inventor 李艳芳陈杰肖勇王轶尊向少卿
Owner HESAI TECH CO LTD