CAJ | 학술논문

由于瞬变电磁技术对水体反应灵敏，已被应用于煤矿井下水害探测。在远距离超前探测时，要求瞬变电磁仪具有抗干扰发射、大动态低噪声采集和防爆设计等特点。为此，研制了双极性发射系统，通过工频整数倍正负发射压制工频干扰；研制了双通道同步放大滤波、双模/数同步采集、双通道数据硬件合成电路，实现大动态范围压噪采集；为保证安全使用，对电源输出进行过流、短路和反接保护。最后通过对充水采空区的探测，验证了仪器的准确性。
유우순변전자기술대수체반응령민，이피응용우매광정하수해탐측。재원거리초전탐측시，요구순변전자의구유항간우발사、대동태저조성채집화방폭설계등특점。위차，연제료쌍겁성발사계통，통과공빈정수배정부발사압제공빈간우；연제료쌍통도동보방대려파、쌍모/수동보채집、쌍통도수거경건합성전로，실현대동태범위압조채집；위보증안전사용，대전원수출진행과류、단로화반접보호。최후통과대충수채공구적탐측，험증료의기적준학성。
The transient electromagnetic technique has been widely used for water disaster detection in coal mines due to its sensitivity to the water body. When the transient electromagnetic instrument is used for remote advance detection, it should have the characteristics of anti-interference transmission, the high dynamic and low-noise acquisition and explosion-proof design. For this purpose, a bipolar transmitter was developed, which used the bipolar transmission with integral multiple of power frequency to suppress the power noise; a circuit with dual-channel simultaneous amplification and filtering, bi-module simultaneous acquisition and dual-channel data synthesis was designed, and the noise-suppression acquisition in a large dynamic range was achieved;for the safe use of the the transient electromagnetic instrument, the over-current protection, short-circuit protection and reverse-connect protection were provided. Finally the accuracy of the transient electromagnetic instrument was verified by the detection of a water-filled zone.