Laser radar subsequent optical path chopper disk output frequency stabilizing method

A laser radar and output frequency technology, applied in the direction of radio wave measurement systems, instruments, etc., to achieve good dynamic and static characteristics, reduce time lag characteristics, and fast effects

Active Publication Date: 2016-04-06
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is a lack of relevant research on the stabilization of the output frequency of chopper discs.

Method used

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  • Laser radar subsequent optical path chopper disk output frequency stabilizing method
  • Laser radar subsequent optical path chopper disk output frequency stabilizing method
  • Laser radar subsequent optical path chopper disk output frequency stabilizing method

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, 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.

[0032] An embodiment of the present invention provides a method for stabilizing the output frequency of optical discs in the laser radar subsequent optical path. The method mainly includes:

[0033] Use the control computer to control the programmable regulated power supply to output the specified DC voltage according to the preset reference frequency and the pulse frequency signal output by the pulse counter;

[0034] Utilize the motor driver to o...

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Abstract

The invention discloses a laser radar subsequent optical path chopper disk output frequency stabilizing method. The method employs a photoelectric conversion output circuit to accurately and rapidly output the frequency of a subsequent optical path chopper disk, which is more accurate and reliable than the rotating speed voltage signal outputted by a motor hall sensor; meanwhile, according to the characteristics of a chopper disk system, the method controls a control computer to perform voltage output control, effectively reduces the time lag characteristic of the subsequent optical path chopper disk system, and possesses rapidity, accuracy, stability, and sound dynamic and static state characteristics; meanwhile, the method controls the computer to perform correlation calculation and result display, and preserves and plays back the intermediate result of each link at any moment.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a method for stabilizing the output frequency of optical discs in the subsequent optical path of laser radar. Background technique [0002] In recent decades, lidar has been used more and more widely to detect atmospheric parameters and atmospheric composition. In order to obtain very weak echo signals in the far field, in laser atmospheric detection, the method of increasing the laser emission power and increasing the area of ​​the receiving telescope is usually adopted. The problem that these two methods bring to lidar is that the near-field echo signal is very strong, and the dynamic range of lidar system detection is not enough, making it difficult to detect. At present, the electronic gating signal of the photomultiplier tube is widely used in the laser radar system to suppress the near-field strong echo signal. The photocathode of the multiplier tube and each amplific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481
CPCG01S7/4816
Inventor 方欣李陶葛冰洁王贤宇
Owner UNIV OF SCI & TECH OF CHINA
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