Multi-Laser Beam Measuring System for Detection of Wind Field Displacement Based on Backscatter Signals

A high-speed data acquisition and processing system with integrated transceivers is designed to measure and monitor the wind fields at real time,which plays an important role in the multi-laser beam displacement measurement of wind field system.It can also realize the real-time extraction of low signal noise ratio(SNR) signals,which transforms rapidly in a wide dynamic range,spatial filtering,precision delay and accurate gate control technology.This system is mainly composed of YAG pulsed laser,avalanche photo diode(APD) detector,cascaded gain amplifiers,analog-to-digital conversion circuitry,field programmable gate array(FPGA) processing chip and its peripheral circuits,single-chip control systems and data transmission circuit.The experimental verification is also carried out,and the results show that multi-beam displacement measuring system can effectively detect the backscatter signals in various distances,by which we can calculate the wind speed and get the wind direction from data analysis.