High-precision low-cost seismic signal acquisition circuit

• Main Authors: CHENG XIANGYU, ZHOU XIANG, ZHU YUHENG, CHEN WEIDONG, JIANG LEXING, DUAN BIN, LI SHUWU, YAN SIYUAN, LI MEIPING, ZHANG MINGCAI, WANG HAISHENG, CHEN ZONGGANG
• Format: Patent
• Language: Chinese; English
• Published: 08.09.2023
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention relates to the field of water conservancy and hydropower engineering geophysical exploration instruments, and particularly discloses a high-precision low-cost seismic signal acquisition circuit which comprises an analog signal input module, a program control amplification module, a high-precision reference voltage generation circuit module, a high-precision multi-channel A/D circuit and a self-checking waveform generation circuit module. The self-checking waveform generation circuit module and the U1 are used for generating various waveforms required by detection for channel and sensor detection, the seismic wave analog signal input module comprises a seismic sensor signal input terminal, a protection unit, a programmed switch and an input signal filter, and the program control amplification circuit module and the U2 are program control operational amplifiers IC. According to the high-precision reference voltage generation circuit module, U3 is a high-precision reference voltage generation circu