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Laser radar transmitting and receiving alignment device and method

A laser radar and laser emission technology, applied in the field of laser remote sensing, can solve the problems of loss of echo signal, loss of echo light, poor real-time performance, etc., to reduce the environment, increase the proportion of working time, and preserve the signal-to-noise ratio.

Active Publication Date: 2019-12-13
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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  • Application Information

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Problems solved by technology

[0007] The above methods usually need to lose part of the echo light or introduce a high-repeatability switching mechanism, and often need to work time-sharing with the lidar system
The main disadvantages are: (1) loss of part of the echo signal; (2) introduction of a switching mechanism with high repeatability requirements; (3) poor real-time performance

Method used

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  • Laser radar transmitting and receiving alignment device and method
  • Laser radar transmitting and receiving alignment device and method
  • Laser radar transmitting and receiving alignment device and method

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Embodiment

[0050] Such as figure 1 As shown, a laser radar transceiver alignment device, the laser radar includes a laser emitting unit 1, a receiving telescope 5 and an echo detection unit 7;

[0051] Wherein, the laser emitting unit emits pulsed laser light with a wavelength of 1064nm. The focal length of the receiving telescope is 1m.

[0052] The transceiver alignment device includes a transmitting optical axis light guide prism 2, an optical axis monitoring camera 3, a receiving optical axis light guiding prism 4, a first focal plane indicating light source 6 and a second focal plane indicating light source 8;

[0053] The focal length of the optical axis monitoring camera 3 is 0.25m, the first focal plane indicates that the light source 6 emits a 1064nm continuous laser, and the second focal plane indicates that the light source 8 emits a 1064nm continuous laser.

[0054] The first focal plane indicating light source 6 and the second focal plane indicating light source 8 are loca...

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Abstract

The invention relates to a laser radar transmitting and receiving alignment device and method, belongs to the technical field of laser remote sensing, and can be used for aligning transmitting and receiving optical axes of a laser radar system. According to the device and the method, an independent transmitting and receiving mismatch measurement system is constructed through focal plane indicationlight, an independent area-array camera and a light guide prism and corresponding algorithms, the transmitting and receiving mismatch amount can be obtained in real time through the system, and a laser pointing adjustment unit is guided to complete transmitting and receiving alignment of a laser radar system.

Description

technical field [0001] The invention relates to a laser radar transceiver alignment device and method, which belongs to the technical field of laser remote sensing and can be used for alignment of the laser radar system transceiver optical axis. Background technique [0002] Lidar can be used for distance detection and atmospheric detection, and is a widely used laser application technology. [0003] Lidar usually uses laser emission with a very small divergence angle and a very narrow field of view to receive, so the alignment of the optical axis of the laser emission and the receiving optical axis is a key factor affecting the performance of the lidar. [0004] In practical applications, a larger receiving field of view can be used to ensure that signals can be received even if the optical axis of the receiving and receiving is deviated, but a larger receiving field of view will introduce larger background light noise. [0005] The use of a small receiving field of view c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481
CPCG01S7/4811
Inventor 王玉诏杨居奎杨超彭欢孙立张晨阳宋志清孙海青
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH