【摘要】 CDMA技术首次应用到地电阻率测量,在强电磁干扰环境下实现微弱电信号的检测和高精度测量.设计并实现了直接用标准电阻标定地电仪的方法并可对仪器的抗干扰能力进行测定.仪器已在地震前兆监测、石油开发中得到实际使用,实现在野外恶劣的测量环境下(信噪比20 dB)取得0.1%的测量精度.更多还原

【Abstract】 CDMA technology is first applied to the measurement of earth resistivity.It realizes measuring of the faint electric signal and precision measurement under the strong interfering of electromagnetic environment.Have designed and realized with the measuring resistance to calibrate the earth resistivity instrament directly and can determine the anti-interference ability of the instrument.The instrument has already been used actually in monitoring of earthquake precursors,oil development,has achiered the measurement precision of 0.1% under the enviroment of abominable measurement of field(SNR 20 dB).更多还原