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Laser radar transmitting system, design method thereof, and laser radar

A laser radar and launch system technology, applied in the field of laser detection, can solve the problems of high energy consumption and high cost, and achieve the effects of reducing installation difficulty, simplifying structure, and optimizing resource allocation

Inactive Publication Date: 2019-06-21
HESAI TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] However, the existing multi-line laser radar often has the problems of high cost and excessive energy consumption.

Method used

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  • Laser radar transmitting system, design method thereof, and laser radar
  • Laser radar transmitting system, design method thereof, and laser radar
  • Laser radar transmitting system, design method thereof, and laser radar

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Embodiment Construction

[0057]It can be seen from the background art that the multi-line laser radar in the prior art has the problems of high cost and excessive energy consumption.

[0058] The existing multi-line lidar adopts multiple lasers and corresponding detectors arranged in the vertical direction to increase the detection range in the vertical direction and the resolution of the vertical field of view. But because each detection channel all needs a laser, so the cost of this laser radar is higher; And, because a detection channel all includes a laser, promptly the laser quantity that comprises in the described laser radar is quite large, therefore also caused internal The problem of complex structure and difficult installation.

[0059] In order to solve the above technical problem, the present invention provides a laser radar transmitting system, including: a light source, the light source includes at least one laser, and the laser is used to emit the first detection beam; a transmitting op...

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Abstract

A laser radar transmitting system, a design method thereof, and a laser radar are provided. The laser radar transmitting system comprises a light source including at least one laser for transmitting first detection light beams; a transmitting optical component used for collimating the first detection light beams into parallel light; a diffractive optical element that splits each collimated first detection light beam into N second detection light beams in the vertical field-of-view direction of the laser radar, wherein the beam splitting ratio among the respective diffraction angles of the diffractive optical element is set as the ratio of the respective predetermined detection distances in the vertical field-of-view direction corresponding to the respective diffraction angles. The technical solution of the invention can not only effectively reduce the number of lasers in the laser radar, but also can take account of both the detection distance and the energy consumption control.

Description

technical field [0001] The invention relates to the field of laser detection, in particular to a laser radar and its transmitting system, and a design method of the laser radar transmitting system. 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 early laser radar is a single-line laser radar, 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 ...

Claims

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Application Information

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IPC IPC(8): G01S7/484G01S17/08G01S17/93
Inventor 陈杰向少卿
Owner HESAI TECH CO LTD
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