阵列式浅地表电磁探测系统控制模式研究  

Research on control mode of array shallow surface electromagnetic detection system

作　　者：周逢道[1,2] 郭群 郭英杰 白冉明 李刚 Zhou Fengdao;Guo Qun;Guo Yingjie;Bai Ranming;Li Gang(College of Instrumentation ＆ Electrical Engineering,Jilin University,Changchun 130061,China;National Geophysical Exploration Equipment Engineering Research Center,Jilin University,Changchun 130061,China)

机构地区：[1]吉林大学仪器科学与电气工程学院,长春130061 [2]国家地球物理探测仪器工程技术研究中心,长春130061

出　　处：《仪器仪表学报》2018年第7期200-207,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51507073)项目资助

摘　　要：以现场可编程门阵列（FPGA）＋数字信号处理（DSP）＋工控机为架构实现多模块阵列探测,每个模块以单独的FPGA＋DSP双核异构框架处理和传输采集的数据,多个模块通过网络将探测数据快速上传至工控机,满足浅地表电磁探测对探测效率及实时性的要求;针对多模块探测阵列中模块间系统同步精度的影响而带来的模块间的天线互扰问题,通过对探测系统的发射和接收、处理数据、上传数据等部分的工作时间的拆分,采用时间分片的控制策略,将多个模块的发射时间完全错开,有效地消除天线的互扰,与发射同步控制方案相比,有效抑制了噪声。实际探测试验表明,系统完成单点探测所有任务的时间小于20 ms,效果良好,验证了提出的阵列式电磁探测系统的性能与控制模式的实用性。This paper realizes multi-module array detection based on the framework of field-programmable gate array（ FPGA）,digital signal processing（ DSP） and industrial control computer. To meet the requirements of detection efficiency and real-time performance for shallow surface electromagnetic detection,the detection data is quickly uploaded to the industrial control computer through network interface by multiple modules,each of which processes and transmits the collected data with a separate dual-core heterogeneous framework based on FPGA and DSP. To solve the antenna interference problem in multi-module detection array caused by synchronization precision among different modules,this paper adopts the control strategy of time slicing to schedule the working time for launching,receiving,processing and uploading data. The proposed method staggers the launch time of multiple modules completely and eliminates the antenna interference effectively. Besides,the proposed method can also suppress noise compared with the launch synchronization control method. The actual detection experiment shows that the time for completing single-point detection task is less than20 ms,validating the performance of the proposed array electromagnetic detection system and the practicability of the control mode.

关 键 词：电磁探测 多模块 时间分片 实时性 

分 类 号：TH762[机械工程—仪器科学与技术]