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a laser radar

A laser radar and laser beam technology, applied in the field of environmental perception, can solve the problems of high cost and large volume of laser radar, and achieve the effect of improving the utilization rate of internal space, reducing crosstalk, and improving the elimination effect.

Active Publication Date: 2020-11-03
HESAI TECH CO LTD
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  • Application Information

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Problems solved by technology

[0005] The present invention solves the technical problems of high cost and large volume of laser radar in the prior art

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Embodiment Construction

[0090] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0091] Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure or characteristic that can be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom" etc. is based on the orientation or positional relationship shown in the drawings, ...

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Abstract

The invention provides a laser radar. The laser radar includes a laser emitting module, a light splitting module, a scanning module and a receiving module. The laser emitting module is used to emit a pulsed laser beam; the light splitting module is used to divide the pulsed laser beam into N beams of incident light beams , and transmitted to the scanning module, where N≥2; the scanning module is used to reflect N beams of incident light beams to three-dimensional space, and is used to receive and reflect N beams of incident light beams reflected by the target to be measured in three-dimensional space. wave light beam; the receiving module is used to receive and process N beams of echo beams; the spectroscopic module and the scanning module correspond to form N sub-scanning fields of view, and the N sub-scanning fields of view form the total field of view of the lidar through field splicing. The laser radar of the present invention uses a spectroscopic module, so under the premise of satisfying the scanning field of view of the laser radar, less than N light sources can be used to reduce the cost of the laser radar, reduce internal heat generation, and reduce the volume of the laser radar.

Description

technical field [0001] The invention relates to the technical field of environment perception, in particular to a laser radar. Background technique [0002] In the autonomous driving technology, the environmental perception system is a basic and crucial part, which guarantees the safety and intelligence of the autonomous vehicle. Among the environmental perception sensors, the laser radar has the advantages of reliability, detection range and ranging accuracy. Has incomparable advantages. [0003] As an important sensor for perceiving surrounding information, vehicle-mounted lidar has field of view and scanning accuracy as its important parameters. For the horizontal field of view, the existing technology usually enlarges the field of view by setting an optical lens in front of the scanning device, or sets up multiple lidars to splice the fields of view collected by them. The method of expanding the field of view of the front lens group requires a more complex lens group, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/483G01S7/486G01S7/481
CPCG01S7/484G01S7/4861G01S7/487G01S17/931G01S7/483G01S7/486
Inventor 吴世祥申士林向少卿
Owner HESAI TECH CO LTD
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