摘要
Abstract
The mud pressure transmitting switch signal is one of the rare signal transmission ways in oil drilling process in the course of detecting signal on the ground and thousands of meters underground.However,due to the tiny pressure signal in the pit,further,combined with the high temperature and high vibration,strong interference environment underground,making reliable and stable acquisition of useful signal become an aporia.To solve this problem,the PIC18F4680 microcontroller is used as the platform,the detection of small pressure signal in underground drilling is initially realized,namely,the interference is ruled out by hardware filtering mode and the useful signal is further extracted by software Kalman filtering.The detailed design method of hardware platform and hardware filtering is given,in addition,the realization method applying Kalman filtering software to tiny pressure signal processing is described,and the results of simulation and field test show that this platform is credible and its performance is better than other similar foreign technologies.关键词
PIC18F4680/微弱信号检测/电荷放大器/高温Key words
PIC18F4680/weak signal detection/charge amplifiers/high temperature分类
信息技术与安全科学
