Pulse laser radar for large scale mapping and method thereof

A pulsed laser and scale technology, which is applied to measurement devices, uses re-radiation, and electromagnetic wave re-radiation, etc., can solve the problems of inability to effectively improve the performance of lidar mapping, and achieve the improvement of ranging dynamic range, pulse frequency, and life. long effect

Inactive Publication Date: 2015-02-18
WUHAN UNIV
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an effective method for improving the pulse frequency and scanning frequency of the laser radar in view of the defect that the mapping performance of t

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  • Pulse laser radar for large scale mapping and method thereof
  • Pulse laser radar for large scale mapping and method thereof
  • Pulse laser radar for large scale mapping and method thereof

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[0035] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] The pulse laser radar used for large-scale mapping in the embodiment of the present invention is essentially a pulse laser rangefinder with high repetition rate and 360° high-speed rotation, mainly including a laser emitting unit, an echo detection unit, and a distance measuring timer. unit and scanning rotation unit etc. Among them, the laser emitting unit is mainly composed of a laser and a transmitting optical system. The transmitting optical system is used to compress the divergence angle of the initial laser beam to enable long-distance transmission; the echo detection unit is composed ...

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Abstract

The invention provides a pulse laser radar for large scale mapping and a method of the pulse laser radar. N sets of laser emitting units and echo detecting units are arranged on a laser head of the pulse laser radar, N>=2, and the N sets of laser emitting units and echo detecting units are distributed along the outer diameter of the laser head with a 2pi/N central angle with a rotary shaft as a center. Each laser emitting unit comprises a laser and an emitting optical system, each echo detecting unit comprises a detector and a receiving optical system, and according to the distance between the emitting optical systems and the receiving optical systems, the echo energy receiving rate ranges from 10 percent to 75 percent when the detecting distance ranges from 2 m to 15 m. High scanning frequency can be achieved, and the distance detecting dynamic range can be improved.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a pulse laser radar for large-scale mapping and a method thereof. [0002] Background technique [0003] At present, international lidar products used for large-scale mapping above 1:2000 mainly include China Beike Tianhui R-Angle-0150, Switzerland Reigl-VQ250, Canada Optech-V100, etc. This type of product only uses a single set of laser emission unit and echo detection unit to collect point cloud data. Therefore, in order to meet the mapping resolution index, this type of product uses a high-frequency solid-state laser as a light source to improve the pulse rate of the system. Frequency, and at the same time, it is necessary to use a very high-speed motor to increase the scanning frequency of the system. Because solid-state lasers have defects such as high price and short service life, and high-speed motors have adverse effects on the angular resolution, stability and powe...

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Application Information

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IPC IPC(8): G01S17/89G01S7/481
CPCG01S17/89G01S7/4812
Inventor 李松史光远田欣周辉黄科
Owner WUHAN UNIV
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