J4 ›› 2009, Vol. 27 ›› Issue (02): 162-.

• 论文 • 上一篇    下一篇

混场源电磁接收系统同步数据采集技术

万云霞a,b,程德福a,b,王言章a,b,卢 浩a,b   

  1. 吉林大学 a.仪器科学与电气工程学院;b.地球信息探测仪器教育部重点实验室,长春 130026
  • 出版日期:2009-03-20 发布日期:2009-07-06
  • 通讯作者: 万云霞(1980— ),女,山东烟台人,吉林大学助理工程师,博士研究生,主要从事频率域电磁数据处理算法研究 E-mail:wanyunxia_1980@yahoo.com.cn;
  • 作者简介:万云霞(1980— ),女,山东烟台人,吉林大学助理工程师,博士研究生,主要从事频率域电磁数据处理算法研究,(Tel)86-13756129723(E-mail)wanyunxia_1980@yahoo.com.cn; 程德福(1959— ),男,辽宁朝阳人,吉林大学教授,博士,博士生导师,主要从事信号检测与处理、智能仪器和地球探测仪器研究|(Tel)86-13500800255(E-mail)chengdef@jlu.edu.cn.
  • 基金资助:

    吉林大学研究生创新基金资助项目(20080237); 吉林省科技发展计划基金资助项目(20050322-1)

Synchronous Data Acquisition Technique of Hybrid-Source Magnetotelluric Receiving System

WAN Yun-xiaa,b,CHENG De-fua,b,WANG Yan-zhanga,b,LU Haoa,b   

  1. a.College of Instrumentation and Electrical Engneering|b. Key Laboratory of Geo-Exploration and Instrumentation of Education Ministry, Jilin University, Changchun 130026, China
  • Online:2009-03-20 Published:2009-07-06

摘要:

在混场源电磁探测中,为弥补天然场电磁信号频率低、能量低的不足,实现接收机对发射信号的有效接收,在分析发射、接收系统工作原理的基础上,提出基于全球卫星定位系统(GPS:Global Position System)的同步数据采集方案。该方案采用发射机发射不同频率高频电磁波作为人工场源,运用GPS的定时定位功能,校准发射、接收系统时间,控制两系统时钟偏差在1 s 以内,确保信号发射与接收同步进行。实验表明,该方案提供的人工发射信号与低频天然场信号相结合,可将混场源电磁探测信号的频率范围由0.1 Hz ~1 kHz扩展到0.1 Hz~50 kHz,拓宽了仪器的探测深度。

关键词: 混场源, 数据采集, 全球定位系统, 同步

Abstract:

In the hybrid-source magnetotelluric detection, in order to make up the natural field whose frequency and power are lower, achieve the reception of the effective signal, a synchronous data acquisition approach based on GPS(Global Position System) was put forward by analyzing the operating principle of the transmitter and the receiver. The transmitter sends high-frequency electromagnetic waves as the manual source. With the orientation and timing of GPS, time calibration of the transmitter and the receiver was achieved. And the discrepancy of the two system clock was under 1 s to ensure the synchronous transmission of the signal. The experiment proved that the signal frequency range of the hybrid-source magnetotelluric detection expanded from 0.1 Hz~1 kHz to 0.1 Hz~50 kHz because of the complementation of the manual signal and the natural signal, and the detection depth of the instrument was deeper.

Key words: hybrid-source magnetotelluric, data acquisition, global position system(GPS), synchronous

中图分类号: 

  • TP274