Portable laser radar two-dimensional scanning system and scanning method based on single-axis rotation double-circular wedge prism
A two-dimensional scanning and laser radar technology, which is applied in radio wave measurement systems, electromagnetic wave reradiation, instruments, etc., can solve the problems of complex structure, large volume, unfavorable small-scale integration of photoelectric systems, etc. small effect
Pending Publication Date: 2022-07-15
YANCHENG TEACHERS UNIV
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing two-axis rotating two-dimensional scanning system, which has a relatively complex structure and a large volume, which is not conducive to the small-scale integrated integration of photoelectric systems, and to provide a portable laser based on a single-axis rotating double prism. The radar two-dimensional scanning system and scanning method can enable the outgoing beam to perform space scanning in various modes such as PPI, RHI, and DBS in a large range, and can be used to detect the spatial distribution of atmospheric physical quantities
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[0083] The present invention will be further described below with reference to the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited by this. The specific implementation method of the present invention is as follows:
[0084] The structural block diagram of the present invention is as follows figure 1 shown. figure 1 The middle beam 1' is incident on the circular wedge prism RWP-1(1) along the axis, passes through the parallel air gap between the two circular wedge prisms in the middle, and exits from the circular wedge prism RWP-2(2). The computer (5) controls the stepping motor 1 (3) and the stepping motor 2 (4) to rotate the RWP-1 (1) and RWP-2 (2) respectively, so as to realize the zenith angle θ and the azimuth angle of the outgoing beam 2' β can be arbitrarily changed within a certain range. The wedge angles α of the two circular wedge prisms are both 19.5° and the refractive indices are both 2.03.
[0085]...
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Abstract
The invention discloses a portable laser radar two-dimensional scanning system and scanning method based on single-axis rotation double circular wedge prisms. The portable laser radar two-dimensional scanning system comprises two circular wedge prisms and two stepping motors, wherein the refractive index of each circular wedge prism is n, and the wedge angle of each circular wedge prism is alpha. And the values of the refractive index n and the wedge angle alpha meet the critical total reflection condition of the light beam on the last emergent surface when the light beam enters the double-circular wedge prism along the axis direction. The stepping motor is controlled by the computer to change the rotation angle of the double-circle wedge prism, so that when a light beam enters the double-circle wedge prism along the axis direction, the emergent light beam can point at any direction within the azimuth angle of 0-360 degrees and the zenith angle of 0-90 degrees-alpha. According to the invention, the emergent light beam can be subjected to space scanning in various modes such as PPI, RHI, DBS and the like in a relatively large range, and the device is used for detecting the space distribution of atmospheric physical quantities.
Description
technical field [0001] The invention belongs to the technical field of laser radar detection, and is suitable for a portable laser radar system that needs to perform beam scanning measurement in order to obtain the spatial distribution of atmospheric physical quantities. Background technique [0002] The two-dimensional scanning system has a wide range of applications in the fields of photoelectric tracking, lidar, especially wind-measuring lidar, and is a key component of wind-measuring lidar, 3D scanning lidar and other equipment. At present, the mainstream system capable of realizing two-dimensional scanning in a large range (hemispherical space) of the outgoing beam is the X-Y dual-axis two-dimensional scanning system. The system adopts a structure in which two 45° mirrors rotate around the horizontal axis and the vertical axis respectively. Although it can realize a wide range of scanning, the structure is relatively complex and the volume is large, which is not conduci...
Claims
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IPC IPC(8): G01S7/481G01S7/483G01S17/95
CPCG01S7/481G01S7/483G01S17/95
Inventor 沈法华蒋佳佳周慧
Owner YANCHENG TEACHERS UNIV