一种正弦波相位激电应用的新方法  

The sine wave phase IP method

作　　者：包金成 BAO Jin-Cheng(No.3 Geological Party,Henan Bureau of Geology and Nonferrous Metals Mineral Resources,Zhengzhou 450046,Chin)

机构地区：[1]河南省有色金属地质矿产局第三地质大队,河南郑州450046

出　　处：《物探与化探》2018年第4期712-724,共13页Geophysical and Geochemical Exploration

摘　　要：根据目前频谱激电和相位激电使用中遇到的问题,提出一种正弦波相位激电的新方法,基于单频正弦波窄带滤波可以大分贝衰减干扰信号、和固定频率滤波的物理相移可补偿的特性,在正弦波波形锁定的情况下,用单片机计数器直接刻读激电绝对相位,在正弦波波峰处定位A/D采集振幅计算电阻率,正弦波相位激电的工作频率1~12.5 Hz,具有原理简单快捷、设备成本低、电极接地条件要求不高、物探测量速度快的特点,抗工频干扰和抗游散直流干扰能力强,特别适合矿山物探,新方法有望解决目前频率域激电高成本、低效益和不适合地质普查的缺点,并在矿山生产中拓展新应用。In this paper,according to the problems existent in spectrum IP and phase IP work,the authors put forward a new method of sine wave phase IP. By using the narrow-band filter based on single frequency sine wave signal,the interference can be attenuated by large db,and phase shift of fixed frequency filter can be compensated. In the case of sinusoidal waveform locking,IP absolute phase can be carved directly and read with single-chip microcomputer counter. The resistivity is calculated by A/D acquisition amplitude positioned at sine wave peak. The sine wave phase IP working frequency is 1 Hz ～ 12. 5 Hz,and it has the advantages of simpleness and quickness,low equipment cost,relatively low electrode grounding requirement,rapid geophysical prospecting measurement,and strong capability of anti-power frequency harassment and anti-stray DC interference. This method is especially suitable for mine geophysical prospecting,which can overcome the disadvantages of current frequency domain IP such as high cost,low efficiency and unsuitability for fault survey. The method expands the new applications in the mine production.

关 键 词：相位激电仪 正弦波 信号同步 物理相移 

分 类 号：P631[天文地球—地质矿产勘探]