基于同步姿态测量的地空三分量电磁接收系统设计
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摘要
针对地空三分量电磁探测对接收信号高速、同步、大量存储、同时记录线圈姿态信息的需求,提出了带有高精度同步姿态测量的全波形地空电磁探测数字接收系统。设计了针对地空电磁法的模拟信号调理电路,通过两片同步驱动的高速24位AD芯片实现三通道高速采样,由FPGA实现了大量数据的实时传输。设计了同步姿态测量装置,可实时同步存储线圈姿态数据。实测结果表示,该数字采集系统能满足三个通道全速192 k Hz的采样率采集电磁数据、以100 Hz的采样率得到同步的线圈姿态数据,并通过实地野外实验证明了该系统可以完成含姿态测量的地空电磁三分量数据采集工作。
In order to meet the requirements of high speed,synchronization,large amount of storage and simultaneous recording of attitude information,an all waveform digital receiving system with high precision synchronous attitude measurement is proposed. The analog signal conditioning circuit for the ground-airborne electromagnetic method was designed. Three-channel high-speed sampling was achieved through 2 high-speed 24-bit ADC driven by synchronous pieces. The real-time transmission of a large amount of data was achieved by FPGA. The synchronous attitude measurement device was designed,and the coil attitude data could be stored in real-time. The measured results show that the digital acquisition system can meet the requirements of the three-channel full-speed 192 k Hz sampling rate to collect the electromagnetic data,and obtain the synchronous coil attitude data with the sampling rate of 100 Hz. The field experiments prove that the system can complete the acquisition and correction of the ground-to-air electromagnetic three-component data with attitude measurement.
In order to meet the requirements of high speed,synchronization,large amount of storage and simultaneous recording of attitude information,an all waveform digital receiving system with high precision synchronous attitude measurement is proposed. The analog signal conditioning circuit for the ground-airborne electromagnetic method was designed. Three-channel high-speed sampling was achieved through 2 high-speed 24-bit ADC driven by synchronous pieces. The real-time transmission of a large amount of data was achieved by FPGA. The synchronous attitude measurement device was designed,and the coil attitude data could be stored in real-time. The measured results show that the digital acquisition system can meet the requirements of the three-channel full-speed 192 k Hz sampling rate to collect the electromagnetic data,and obtain the synchronous coil attitude data with the sampling rate of 100 Hz. The field experiments prove that the system can complete the acquisition and correction of the ground-to-air electromagnetic three-component data with attitude measurement.
引文
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2 王卫平,曾昭发,吴成平.频率域航空电磁系统线圈姿态变化影响及校正方法[J].地球科学(中国地质大学学报),2015,40(7):1266-1275Wang Weiping,Zeng Zhaofa,Wu Chengping. Coil attitude influence and attitude correction method for frequency domain airborne electromagnetic system[J]. Earth Science(Journal of China University of Geosciences),2015,40(7):1266-1275
3 Fitterman D V,Yin C C. Effect of bird maneuver on frequency-domain helicopter EM response[J]. Geophysics, 2004,69(5):1203-1211
4 曲昕馨.三维频域航空电磁法的数值模拟姿态及姿态影响和校正研究[D].长春:吉林大学,2014Qu Xinxin. Numerical three-dimensional frequency domain airborne electromagnetic simulation and correction of posture and attitude affect research[D]. Changchun:Jilin University,2014
5 蔡跃荣,朱光武,孙越强,等.一种使用BU-65170内部部RAM实现双缓冲的星载1553B总线数据传输技术[J].科学技术与工程,2016,16(31):41-45Cai Yuerong,Zhu Guangwu,Sun Yueqiang,et al. A 1553B bus data transmission technology using BU-65170 internal RAM for doublebuffer on payload[J]. Science Technology and Engineering,2016,16(31):41-45
6 刘立超.网络化可控源音频大地电磁法接收系统关键性技术研究[D].长春:吉林大学,2014Liu Lichao. Research on techniques of networked receiver for controlled sourse audio-fequency magnetotelluric method[D]. Changchun:Jilin University,2014
7 李汉舟.基于激光捷联惯导的实时高精度动态测量系统研究[D].西安:西北工业大学,2015LI Hanzhou. Real time and high precision dynamic attitude measurement system based on LINS[D]. Xi'an:Northwestern Polytechnical University,2015
8 王琦,林君,于生宝,等.固定翼航空电磁系统的线圈姿态及吊舱摆动影响研究与校正[J].地球物理学报,2013,56(11):3741-3750Wang Qi,Lin Jun,Yu Shengbao,et al. Coil car attitude and fixedwing airborne electromagnetic system impact studies and swing correction[J]. Geophysics,2013,56(11):3741-3750
9 任同阳,刘长胜,刘腾,等.频率域地空电磁探测系统在采空区勘探中的应用[C]//第四届中国地球科学联合学术年会.北京:中国地球物理学会,2017:1753-1755Ren Tongyang,Liu Changsheng,Liu Teng,et al. Applications of frequency domain grounded electric source airborne electromagnetic system in goaf exploration[C]//Forth Annual Meeting of Chinese Geoscience Union. Beijing:Chinese Geophysical Society,2017:1753-1755
10 Kong F N. Hankel transform filters for dipole antenna radiation in a conductive medium[J]. Geophysical Prospecting,2007,55:83-89
11 Sengpiel K P,Siemon B. Advanced inversion methods for airborne electromagnetic exploration[J]. Geophysics,2000,65:1983-1992
12 曾新森.频率域可控源电磁法梯度采集系统设计[D].长春:吉林大学,2016Zeng Xinsen. Design of receiver for frequency-domain controlledsource electromagnetic gradient method[D]. Changchun:Jilin University,2006