Full digital adjusting laser spacing system

Abstract

The invention relates to an all-digital adjustable laser ranging system, which includes an avalanche high-voltage module, a photoelectric detector, an adjustable gain amplifier module, a noise signal detection module, a first AD sampling module, an echo signal detection module, and a second AD sampling module. module, the information processing circuit is used to adjust the avalanche voltage provided by the avalanche high voltage module to the photodetector according to the number of noises counted by the first AD sampling module, and output a corresponding avalanche high voltage adjustment signal to the avalanche high voltage module; 2. The AD sampling module counts the number of echoes, adjusts the amplification gain of the gain-adjustable amplifying module, and outputs a corresponding time-varying gain control signal to the gain-adjustable amplifying module. The main function of this system is to complete the detection of target distance and target reflection intensity. The laser echo signal reflected by the target received by the photoelectric D detector, after automatic gain amplification and AD sampling, is used to time the flight time of the laser pulse and detect the amplitude width signal, so as to calculate the distance information and target reflection characteristics of the target.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to an all-digital adjustable laser ranging system. Background technique [0002] Laser ranging is to use a certain parameter of modulated laser to realize the distance measurement to the target. The traditional solution uses analog circuit closed-loop control to achieve gain control and noise suppression. Generally, the noise is identified through the triode. There is no accurate quantitative analysis of the echo and noise signals. The parameters are set according to experience, and the gain of the avalanche high voltage and the amplification module cannot be adjusted accurately. , leading to low measurement accuracy. Contents of the invention [0003] The purpose of the present invention is to improve the above-mentioned deficiencies in the prior art, and provide a fully digitally adjusted laser ranging system. [0004] In order to achieve the purpose of the above invention, the...

AI Technical Summary

Problems solved by technology

The traditional solution uses analog circuit closed-loop control to achieve gain control and noise suppression. Generally, the triode is used to identify the noise. There is no accurate quantitative analysis of the echo and noise signals. The parameters are set according to experience, and the gain of the avalanche high voltage and the amplification module cannot be adjusted accurately. , resulting in low measurement accuracy

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