LiDAR Field of View Matching Method Based on Geometric Factor Judgment
A geometric factor and matching method technology, which is applied in the directions of electromagnetic wave re-radiation, climate sustainability, instruments, etc., can solve the problems of inconvenient use in the application of multiple emitting beams, and achieve the effect of accurate and fast matching
Active Publication Date: 2022-05-20
INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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The method of spot collimation is not affected by the atmospheric state and has good adjustment accuracy, but it needs to add an additional detection device for the receiving light path, which is inconvenient for the application of multiple emitting beams
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[0024] In order to facilitate the understanding and implementation of the present invention by those of ordinary skill in the art, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.
[0025] like figure 1 As shown in the figure, there is a certain distance between the laser emission beam and the receiving telescope. The laser emission beam starts to enter the field of view of the receiving telescope after a certain distance, and the overlapping area gradually increases as the height increases, and finally completely enters the field of view of the receiving telescope. A photodetector is placed on the focal plane of the receiving telescope to receive the detection echo signal. The geometric factor of the lidar indicates the degree of coincidence between the emitted las...
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The invention discloses a laser radar field of view matching method based on geometric factor judgment. According to the different positions of the emitted laser light in the receiving field of view, the complete echo signal is used to obtain the geometric factor ratio library under the condition of different detection atmospheric heights, and the geometric factor measurement ratio is calculated. , and then determine the current laser emission direction by the geometric factor measurement ratio and the geometric factor ratio library to lock the field of view. The invention is less affected by the weather, can quickly and automatically complete field of view matching, does not need to add additional equipment and devices on the hardware, and has better compatibility for the application of multiple emitting beams.
Description
technical field [0001] The invention relates to the technical field of laser radar, in particular to a method for matching the field of view of laser radar based on geometric factor judgment. Background technique [0002] As an active remote sensing technology, lidar has become an important means of atmospheric detection. Lidar uses the principle of backscattering for remote sensing detection, receives the echo signal after the interaction between the laser and the atmosphere, and determines the density of atmospheric molecules according to different detection mechanisms (meter scattering, Rayleigh scattering, Raman scattering, absorption, resonance, etc.). , temperature, wind field and concentration content and other parameters are measured. [0003] With the continuous development of lidar technology, there are many types of lidars using various detection mechanisms. For different applications, the system structure is different, but the basic structure of lidar can still ...
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IPC IPC(8): G01S17/95G01S7/48
CPCG01S17/95G01S7/4802Y02A90/10
Inventor 林鑫杨勇季凯俊闫文兵陈振威王积勤刘林美程学武李发泉
Owner INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS