大功率多功能发射系统研究  

A study on high-power multi-function transmitting system

作　　者：石福升[1,2] 

机构地区：[1]中国地质大学,北京100083 [2]中国地质科学院地球物理地球化学勘查研究所,廊坊065000

出　　处：《地球物理学进展》2009年第3期1109-1114,共6页Progress in Geophysics

基　　金：中国地质调查局"十一五"地调科研项目"大深度高分辨电磁测量技术与多功能电法仪器研制";项目(1212010660301);国家高技术研究发展计划(863计划)"大深度多功能电磁探测技术与系统集成";项目(2007AA060601)资助.

摘　　要：DEM-T70是自行研制的具有自主知识产权的大功率多功能智能发射系统,用于为地面电磁法勘探提供大功率的人工场信号.发射系统中采用了GPS同步、DDS(直接数字频率合成)、CPLD(复杂可编程逻辑器件)、数字式PWM(脉冲宽度调制)稳流和发电机励磁稳流等新技术,开发了多频同步供电、高密度频点供电、全自动扫频供电和大功率快速逆变等关键技术,研制出大功率(70 kw)多功能(CSAMT-可控源音频大地电磁、SIP-谱激电、TDIP-时域激电)电磁法发射系统,其最高供电频率为8000 Hz,最高电压1200 V,最大电流100 A.场地试验表明,发射系统功能设计合理、技术指标先进、性能稳定可靠,该系统填补了我国在该领域的空白.DEM-T70 is a high power multi-function intelligent transmitter developed by our team independently. It is used to supply active field signal for EM prospecting by sending high-power current into ground. The transmitter adopts the following new techniques, such as GPS synchronization, DDS （Directive Digital frequency Synthesis）, CPLD（Complex Programmable Logic Device）, digital PWM（Pulse Width Modulation） constant current and generator excitation constant current etc. We have also developed the following key techniques： multi-frequency synchronization sending, high-density frequency point sending, full-auto sweeping sending and rapid high power inverter. DEM-T70 has the features of high-power （70 kW）, multi function （CSAMT-Controlled Source Audio MT, SIP Spectrum IP, TDIP-Time domain IP）, its maximum frequency is 8000 Hz, maximum voltage is 1200V and maximum current is 100A. Field experiments indicate that DEM-T70＇s functions are reasonable, its specifications are advanced, its performance is stable and reliable. The DEM-T70 transmitter has filled a gap of this field in our county.

关 键 词：大功率多功能 电磁法发射系统 关键技术 场地试验 

分 类 号：P631[天文地球—地质矿产勘探]