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Signal Processing System for Seismic Exploration Based on Laser Doppler Effect

In order to improve the resolution of seismic acquisition, a new signal processing system for seismic exploration based on laser Doppler effect is proposed with an optimized differential optical configuration. The frequency bandwidth is properly determined by analyzing the frequency of the Doppler signal. The velocity, displacement, acceleration and frequency to be measured can be real-time obtained by frequency/voltage (F/V) converting the FM Doppler signal. A 100 dB dynamic range and the linear frequency range of 1.0 to 1000 Hz are realized. It is proved by experiments that the measurement accuracy of amplitude and frequency respectively are 0.6% and 1.0%. Obviously, the technological parameters are satisfactory, and the signal processing system for seismic exploration based on laser Doppler effect can be employed to explore in physical geography