Abstract:

The seismic exploration technology needs vibroseis to provide seismic wave with highly autocorrelation function. To solve this problem, we put forward a method of using m sequence coding pulse signal to design vibroseis signal. Firstly, we use Matlab to generate m sequence and pulse signal, then we use m sequence modulating pulse signal to generate scanning signal, finally we realize scanning signal through hardware circuit. We use the GEIST seismograph to acquire the scan signal, and use Matlab to analyze the data. The results show that the seismic wave signal has high signal to noise ratio.

Key words: vibroseis, m sequence, coding, pulse signal, signal to noise ratio