摘要
为了测量近海底矿物和矿石产生的微弱自然电场信号,设计了一种灵敏的海底自然电位法检测系统。该系统前端采用精密仪表放大器INA118对来自碳电极的微弱电场信号进行一级差分放大,后级采用内置PGA的24位高精密的A/D转换器ADS1256对电场信号进行二级放大和A/D转换。主控制器采用32位ARM内核微处理器STM32,将采集的数据存放在SD卡中。本系统通过了"大洋一号"科考船在南海海试的验收,并已在第26次大洋科考中用于海底热液硫化物勘探。
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.
出处
《传感器与微系统》
CSCD
北大核心
2013年第2期36-38,42,共4页
Transducer and Microsystem Technologies
基金
浙江省教育厅资助项目(Y201017467)
