High-power Constant Current Technique for the Ezcitation Source of Electromagnetic Ezploration on Land
In the field of geophysical exploration,one of effective methods to detect buried metal ores is multiple-frequency fusion electromagnetic excitation and its imaging. This technique needs to set a highpower artificial EM source in subsurface of the target area. To facilitate supply of such a large power,a constant current of high-voltage is necessary. However,some factors such as heterogeneities of subsurface media,property of excitation polarization and variations of the natural EM field can make terrestrial impedance change with time,so that the output current will be unstable and data collection will be influenced. To solve this issue,this paper presents a kind of high power constant current technique based on the excitation of generator. We describe its implement method and operating principles in detail,and display the schematic circuit diagram. The result of the experiment shows that this technique is feasible and its constant current precision can meet the requirement of electromagnetic exploration.
Electromagnetic ezploration Constant current of generator ezcitation ezperiments with heavy load.
Fusheng Shi Ming Deng Meng Wang Yingying Liu
Key Laboratory of Geo-detection(China University of Geosciences,Beijing),Ministry of Education No.29 Key Laboratory of Geo-detection(China University of Geosciences,Beijing),Ministry of Education No.29 Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang
国际会议
2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)
北京
英文
2716-2720
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）