Wide-Range Dynamic Signal Pre-Processing Circuit to Rayleigh Wave Seismic Prospecting Apparatus

A novel method for Rayleigh wave signal preprocessing with a new structure ADC was proposed. By investigating the deficiency of traditional Rayleigh wave prospecting apparatus in effective dynamic range and exploration precision, this note brought forward a new floating-point ADC signal channel. Signal amplifying and offset error self-compensation algorithm were discussed. APP show that system transient dynamic range/tiptop signal frequency of fleet-level, middle-level & deep-level are 90 db/1536 Hz, 90 db/200 Hz & 84 db/156 Hz respectively, and the upright exploration resolution of middle & deep-level is better than the traditional floating-point ADC and Sigma-Delta ADC prospecting apparatus.