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A pulsed laser echo signal conditioning circuit and pulsed laser scanning system

A technology of echo signal and pulsed laser, which is applied in the direction of radio wave measurement system, electromagnetic wave re-radiation, instruments, etc., can solve the problems of increasing noise and measuring flying spots, etc., to improve the measurement distance and distance measurement accuracy, the most The effect of good signal-to-noise ratio and good time jitter error

Active Publication Date: 2022-02-22
MIANYANG SKYEYE LASER TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

The gain of the post-stage increases the noise, and there will be more flying spots measured

Method used

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  • A pulsed laser echo signal conditioning circuit and pulsed laser scanning system
  • A pulsed laser echo signal conditioning circuit and pulsed laser scanning system
  • A pulsed laser echo signal conditioning circuit and pulsed laser scanning system

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Embodiment Construction

[0024] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0025] This embodiment proposes a pulsed laser scanning system, please refer to figure 1 , which includes a laser emitting unit 600, an echo signal receiving unit 100, a monitoring signal receiving unit 500, a monitoring signal conditioning unit 400, a callback signal conditioning unit 200, and a laser pulse timing unit 300. The pulse laser of the laser emitting unit 600 The transmitted signal is transmitted to the callback signal conditioning unit 200 and the laser pulse timing unit 300 through the monitoring signal receiving unit 500 and the monitoring signal conditioning unit 400 in sequence, and the pulsed laser light emitted by the laser transmitting unit 600 is reflected and then transmitted to the echo signal receiving unit. unit 100 , the pulsed laser echo signal output by the echo signal receiving unit 100 is transmitted to the callback ...

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Abstract

The invention discloses a pulse laser echo signal conditioning circuit, which includes: a saturation signal detection and self-resetting unit, which is used to output a level signal in a locked state when the width and amplitude of the pulse laser echo signal reach a preset value , output the level signal of the reset state after the input of the next pulsed laser emission signal ends; the time attenuation control signal generating unit is used to generate the attenuation factor according to the output signal of the saturation signal detection and self-resetting unit as M=4π×(t ×C) 2 The control signal of the control signal; the adjustable attenuator unit is used to attenuate the amplitude of the pulsed laser echo signal; the impedance transformation unit is used to perform impedance matching on its input and output terminals; the limiting amplifier unit is used to input the analog The signal is converted into a digital signal and output. The invention can obtain the best signal-to-noise ratio, and the signal attenuation ratio of the latter stage can be adjusted, which can improve the measurement distance and distance measurement precision.

Description

technical field [0001] The invention relates to laser radar, laser scanner, laser range finder and other equipment, in particular to a pulse laser echo signal conditioning circuit and a pulse laser scanning system. Background technique [0002] The pulsed laser scanner starts timing when it is launched, and uses the near-infrared laser to irradiate the target and then reflects it back, and then converts the optical signal into an electrical signal through the receiving mirror. The time of flying in the air, and then calculate the distance of the target according to the flight time, is currently one of the fastest ranging methods. The transmitting and receiving device is combined with a rotatable mirror. With the rotation of the mirror, the linear array distance measurement can be completed in a very short time. It can be used with aircraft, drones, and vehicles to quickly measure terrain and buildings. It is widely used in geological exploration, earthwork survey, vegetatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/08G01S7/4865G01S7/489
CPCG01S7/486G01S7/489G01S17/08
Inventor 李韦廷唐丹潘文武虞静唐海龙王瑜婵
Owner MIANYANG SKYEYE LASER TECH