SHENG Qing-hua1, YUAN Lu-hua2, YAN Yun-peng1, et al. Research on self-potential seabed prospecting system based on 24-bit AD[J]. 2013, 32(2): 36-38+42.
SHENG Qing-hua1, YUAN Lu-hua2, YAN Yun-peng1, et al. Research on self-potential seabed prospecting system based on 24-bit AD[J]. 2013, 32(2): 36-38+42. DOI: 10.13873/j.1000-97872013.02.005.
In order to measure the faint self-potential signal produced by the minerals and ore on seabed
a sensitive self-potential detecting system is designed.Precision instrumentation amplifier INA118 is used to realize first-level differential amplification for the faint self-potential signal from carbon electrode.Then ADS1256
extremely low noise
built-in PGA
24-bit A/D converter
is used to complete second-level amplification and AD conversion.The master controller is 32-bit ARM microprocessor STM32
and the collected data was stored in the SD card.This system has been checked by"DA YANG YI HAO"in the South China Sea trial
and has already been used to detect submarine hydrothermal sulfide in the 26th ocean scientific investigation.