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.