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Scanning device and scanning method thereof and laser radar

A technology of scanning device and scanning method, which is applied in the field of laser detection, can solve the problems that laser radar is difficult to reach, and achieve the effect of high frame rate acquisition

Inactive Publication Date: 2019-05-21
HESAI TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the laser radar in the existing technology is often difficult to meet this requirement

Method used

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  • Scanning device and scanning method thereof and laser radar
  • Scanning device and scanning method thereof and laser radar
  • Scanning device and scanning method thereof and laser radar

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Embodiment Construction

[0037] It can be seen from the background art that the scanning device of the laser radar in the prior art has the problem that the field of view direction, size and angular resolution cannot meet the detection requirements.

[0038] In the prior art, the implementation method of solid-state laser radar is mainly the MEMS vibrating mirror solution. After the MEMS galvanometer solution is installed on the machine, its field of view area is fixed, and it can only detect targets within the maximum field of view, and cannot perform encrypted detection on any target in the measurement area to identify more specific details.

[0039] The implementation method of solid-state laser radar is mainly MEMS galvanometer scheme. After the MEMS galvanometer solution is installed on the machine, its field of view area is fixed and can only be detected in a certain area. By changing the amplitude of the galvanometer, the size of the field of view angle can be changed to achieve encrypted detec...

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Abstract

The invention discloses a scanning device and a scanning method thereof and a laser radar. The scanning device comprises a galvanometer and a spatial light modulator, wherein the galvanometer is provided with a motion part, the motion part is provided with a reflecting surface suitable for reflecting an incident light beam to form an emergent light beam, the galvanometer changes the propagation direction of the emergent light beam through swinging of the motion part, and at least one selected from the vibration frequency and the amplitude of the motion part of the galvanometer is changeable; and the spatial light modulator is located in the optical path of at least one selected from the incident light beam and the emergent light beam and is suitable for adjusting the phase of light waves to change the propagation direction of the light beam. In the technical scheme disclosed in the invention, on the premise of ensuring the scanning frequency of the scanning device and realizing high frame rate acquisition, the direction of the scanning field of view, the size of the field of view and the resolution of the field of view angle are adjustable, and thus, the field of view can be adjusted according to detection requirements, and more accurate target information can be provided for unmanned driving or other fields.

Description

technical field [0001] The invention relates to the field of laser detection, in particular to a scanning device, a scanning method thereof, and a laser radar. Background technique [0002] Lidar is a commonly used ranging sensor, which has the characteristics of long detection distance, high resolution, and low environmental interference. It is widely used in intelligent robots, drones, unmanned driving and other fields. In recent years, with the rapid development of autonomous driving technology, lidar, as the core sensor of distance perception, has become indispensable. [0003] During the use of laser radar, when a target in a certain direction is found to attract the attention of the algorithm and further detection is required, more laser detection of beams in this direction is required, that is, the number of laser lines on the target is used for encrypted detection. Identify the details of the target. [0004] However, the laser radar in the existing technology is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481
CPCG01S7/481
Inventor 卢炎聪向少卿
Owner HESAI TECH CO LTD
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