Magnitude estimation algorithm in seismic data acquisition application

The seismic wave analysis determines a local, body and surface magnitudes of seismic waves using the seismic signal without distortion. In reducing the noise signal and distortion, the seismic data logger needs to have the signal conditioning circuit in the front end circuit. However, this conditioning circuit can not generate an output signal over the supply voltage. Therefore, the output stage saturation of operational amplifier or the low pass filter circuits is the main problem of the seismic application. This paper presents a new approach in seismic applications to estimate an amplitude of seismic wave under the output stage saturation by using orthogonal technique and scaling method. The comparison between the simulation results and the input signal demonstrated the accuracy of analysis. The results of proposed and FFT algorithms indicated the differential errors of calculations in saturation region. The seismic waves were also evaluated to find the actual amplitude with output stage saturation.