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Laser radar and working method thereof

A laser radar and laser technology, applied in the re-radiation of electromagnetic waves, the use of re-radiation, measurement devices, etc., can solve the problems of high cost and difficult installation of multi-line radar, and achieve cost reduction and installation difficulty, low cost and high cost. Effects of Field of View and Angular Resolution

Inactive Publication Date: 2018-06-29
HESAI TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing multi-line radar has the disadvantages of high cost and difficult installation

Method used

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  • Laser radar and working method thereof
  • Laser radar and working method thereof
  • Laser radar and working method thereof

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Experimental program
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Effect test

Embodiment Construction

[0025] There are many problems with lidar devices, such as high cost and difficult installation.

[0026] Combining with a kind of laser radar, the reasons for the high cost and difficult installation of the laser radar are analyzed:

[0027] The lidar includes: a laser, used to emit laser light to a target; a detector, used to receive the laser light reflected back by the target.

[0028] During the working process of lidar, the laser emits laser light to the target. After the laser reaches the target, it returns to the detector due to the diffuse reflection of the target. A conventional lidar device includes only one laser and a detector, therefore, the lidar device can only emit one beam of laser light at the same time, resulting in a lower vertical angular resolution of the lidar. To improve the vertical angular resolution of lidar, a multi-line lidar is proposed.

[0029] figure 1 It is a schematic diagram of the laser structure of a multi-line lidar.

[0030] Please ...

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Abstract

The invention relates to a laser radar and a forming method thereof. The laser radar comprises a beam splitting device, wherein the beam splitting device is used for splitting a first laser beam intoa plurality of second laser beams which are propagated along different directions; the second laser beams which are propagated along different directions are used for detecting the to-be-detected targets at different bearings, so as to increase the field angle and angle resolution of the laser radar; the first laser beam is split into the multiple second laser beams through the beam splitting device, and the multiple second laser beams are obtained through a laser device, so that the number of laser devices is greatly reduced, the cost of the laser radar is reduced, and the difficulty in installation of the laser radar is decreased. The laser radar has the advantages that the field angle and angle resolution are higher, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of semiconductor manufacturing, in particular to a laser radar and a working method thereof. 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. The working principle of lidar is similar to that of micron-wave radar, which uses the time it takes for light waves to travel between the radar and the target to evaluate the distance. [0003] The initial lidar is a single-line lidar, that is, there is only one laser and detector, and the range of scanning targets is limited, which is easy to cause the lack of detection targets. In order to make up for the shortcomings of single-line lidar, multi-line lidar has increasingly become the focus of research and commercial use. Multi-line lidar uses multiple...

Claims

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Application Information

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IPC IPC(8): G01S17/08G01S7/481
CPCG01S17/08G01S7/4814
Inventor 卢炎聪孙文婷向少卿李一帆
Owner HESAI TECH CO LTD
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