The hardware design of a mine resistivity tomography instrument

摘要

In order to detect geological bodies which harm to the safety production of mine, such as faultage, fold, coal bed attenuation region, falling post and so on, a resistivity tomography instrument is developed according to the requirement of explode-proof requirements. The potential channel and the current channel of the instrument are independent, and each channel has two grade active low-pass filter and two grade industry frequency notch filter. Furthermore, a 24 bit ADC ADS1251U is used, which improves the anti-jamming capacity and measure precision. Portable aptitude distribution electric pole system is designed, which can easy constitute 2D or 3D measure system. The whole instrument is designed according to explode-proof requirements and suitable for tomography geological bodies in well. Application result shows that a good tomography effect is achieved using the resistivity tomography instrument.