Laser radar
A laser radar and laser beam technology, applied in the field of detection, can solve the problem of occupying part of the area, and achieve the effects of increased detection distance, large receiving field of view, and fewer optical components
Active Publication Date: 2020-06-19
HUAWEI TECH CO LTD
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[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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Embodiment Construction
[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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The invention discloses a laser radar, and belongs to the technical field of detection. The laser radar comprises a light source, a scanning mirror, a detector and a reflecting mirror group, wherein the scanning mirror comprises a transmitting reflecting surface and a receiving reflecting surface; the reflecting mirror group comprises a first reflecting mirror and a second reflecting mirror, and the first reflecting mirror and the second reflecting mirror are perpendicular to the same plane; the included angle between the first reflecting mirror and the second reflecting mirror is a first included angle, the included angle between the incident laser beam of the transmitting reflecting surface and the emergent laser beam of the receiving reflecting surface is a second included angle, and the second included angle is twice of the first included angle; the emission reflecting surface is used for reflecting the laser beam emitted by the light source; the receiving reflecting surface is used for reflecting a laser beam reflected back by an object to the detector; and the first reflecting mirror and the second reflecting mirror are used for changing the propagation direction of the laserbeam. By adopting the invention, the technical problem that the existing laser radar has extremely high requirements on the installation and adjustment precision can be solved.
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