lidar
A laser radar and laser beam technology, applied in the field of detection, can solve the problem of occupying part of the area, reduce the installation and adjustment requirements, improve the detection distance and efficiency, and achieve the effect of synchronous scanning and receiving
Active Publication Date: 2022-05-13
HUAWEI TECH CO LTD
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Problems solved by technology
[0005] In the related art, the scanning mirror of the lidar has only one reflecting surface, and both the emitted laser beam and the reflected laser beam need to be reflected on the reflecting surface, each occupying part of the reflecting surface area of the scanning mirror
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[0076] An embodiment of the present invention provides a laser radar. The lidar can be applied to automobiles as an auxiliary component of the intelligent driving system to detect surrounding vehicles, pedestrians and obstacles. It can also be used in the military field for battlefield reconnaissance, electronic countermeasures, tracking and measurement, etc. It is used in the field of environmental science for atmospheric monitoring and wind forecasting, etc. In addition, the lidar can also be applied in the fields of biological sciences and remote sensing.
[0077] The laser radar can emit a laser beam in a certain direction through an internal light source. After the laser beam is irradiated to an object on the optical path, part of the laser beam will be reflected back to the laser radar after diffuse reflection. At this time, the laser radar can detect the laser beam reflected back by the object through the detector. Then, the lidar provides information about the emitt...
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Abstract
The invention discloses a laser radar, which can be used in the fields of Internet of Vehicles, perception, intelligent driving and the like. The laser radar includes a light source, a scanning mirror, a detector and a mirror group, wherein: the scanning mirror includes a transmitting reflective surface and a receiving reflective surface; the mirror group includes a first reflector and a second reflector, and the first reflector It is perpendicular to the same plane as the second reflector; the angle between the first reflector and the second reflector is the first angle, and the angle between the incident laser beam on the emitting reflective surface and the outgoing laser beam on the receiving reflective surface is the second included angle, and the second included angle is twice the first included angle; the emitting reflective surface is used to reflect the laser beam emitted by the light source; the receiving reflective surface is used to reflect the object back The laser beam is reflected to the detector; the first reflector and the second reflector are used to change the propagation direction of the laser beam. The present invention can solve the technical problem that the existing laser radar requires extremely high accuracy of assembly and adjustment.
Description
technical field [0001] This application relates to the field of detection technology, in particular to laser radar. Background technique [0002] Lidar is a radar system that emits laser beams to detect characteristic quantities such as the position and speed of targets. Its working principle is to emit a laser beam to the target, and then compare the received laser beam reflected from the target with the emitted laser beam, and after proper processing, the relevant information of the target can be obtained, such as target distance, azimuth, height , speed, attitude, and even shape parameters. [0003] In the related art, the lidar includes a light source, a scanning mirror, a detector and a reflector. Both the scan mirror and the reflector have a reflective surface, and a small hole is opened on the reflector. The laser beam emitted by the light source passes through the small hole on the reflector, irradiates on the scanning mirror, and is reflected and output by the sca...
Claims
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IPC IPC(8): G01S7/481G01S17/02
CPCG01S7/4817G01S17/02G02B26/105G01S17/06G01S17/88
Inventor 欧阳奎曾理韩国庆蒋臣迪
Owner HUAWEI TECH CO LTD