Development and performance tests of maintenance-free ultra-low noise solid nonpolarizing electrodes
-
摘要: 针对传统不极化电极极差稳定性差、低频噪声大、寿命短、需要定期维护等缺点,研制出免维护超低噪声固体Pb-PbCl2不极化电极。室内测试结果表明:所研制的电极极差在一个月内漂移小于0.06 mV,只有法国进口PMS9000电极的5%;温度系数小于20 μV/℃,不到PMS9000电极的1/5;在100 m电极距条件下,相对于天然感应电场的信噪比为40 dB@103 s、20 dB@104 s和10 dB@105 s。野外对比测试表明:利用新研制的固体不极化电极可以明显提高对地电场信号的采集精度,显著提升大地电磁死频带和低频段数据质量。Abstract: To overcome the shortcomings of traditional nonpolarizing electrodes, such as the poor stability of potential difference, high low-frequency noise, short life, and requiring regular maintenance, the authors researched and developed maintenance-free ultra-low noise Pb-PbCl2 nonpolarizing electrodes after over a decade of development and constant tests. Lab test results show that the new nonpolarizing electrodes have a potential difference drift within one month of less than ±0.06 mV and a temperature coefficient of less than 20 μV/℃, which are 5% and less than one-fifth of those of the PMS9000 electrodes exported from France, respectively; under the ideal condition of the distance between two adjacent electrodes of 100 m, the signal-to-noise ratios relative to the natural induced electric field are 40dB@103s, 20dB@104s, and 10dB@105s. The field comparative tests show that the newly developed solid nonpolarizing electrodes can significantly improve the acquisition accuracy of geoelectric field signals and the data quality of dead and low magnetotelluric frequency bands.
-
-
[1] He L, Chen L, Dorji D, et al. Mapping chromite deposits with audio magnetotellurics in the Luobusa ophiolite of southern Tibet[J]. Geophysics, 2020, 83(2): B47-B57.
[2] Marquis G, Darnet M, Sailhac P, et al. Surface electric variations induced by deep hydraulic stimulation: An example from the Soultz HDR site[J]. Geophysical Research Letters, 2002, 29(14): 71-74.
[3] Revil A, Hermitte D, Voltz M, et al. Self-potential signals associated with variations of the hydraulic head during an infiltration experiment[J]. Geophysical Research Letters, 2002, 29(7): 101-104.
[4] Petiau G, Dupis A. Noise, temperature coefficient, and long time stability of electrodes for telluric observations[J]. Geophysical Prospecting, 1980, 28(5): 792-804.
[5] 董亮, 吴桐, 吴昉赟, 等. 长效铜/饱和硫酸铜参比电极的研究进展[J]. 腐蚀与防护, 2020, 41(6):1-6.
[6] Dong L, Wu T, Wu F Y, et al. Progress of permanent copper/saturated copper sulfate reference electrode[J]. Corrosion and Protection, 2020, 41(6): 1-6.
[7] 邓明, 刘志刚, 白宜诚, 等. 海底电场传感器原理及研制技术[J]. 地质与勘探, 2002(6):43-47.
[8] Deng M, Liu Z G, Bai Y C, et al. The theory and development technology of the sea-floor electric field sensor[J]. Geology and Exploration, 2002(6): 43-47.
[9] 王辉, 叶高峰, 魏文博. Pb-PbCl2不极化电极的设计与实现[J]. 地震地磁观测与研究, 2010, 31(3):115-120.
[10] Wang H, Ye G F, Wei W B. The design and implementation of non-polarizable Pb-PbCl2 electrodes[J]. Seismological and Geomagnetic Observation and Research, 2010, 31(3): 115-120.
[11] Chen K, Jin S, Wang S. Electromagnetic receiver with capacitive electrodes and triaxial induction coil for tunnel exploration[J]. Earth, Planets and Space, 2017, 69(1): 1-10.
[12] Wang Z, Deng M, Chen K, et al. Development and evaluation of an ultralow-noise sensor system for marine electric field measurements[J]. Sensors and Actuators A: Physical, 2014, 213:70-78.
[13] Perrier F E, Petiau G, Clerc G, et al. A one-year systematic study of electrodes for long period measurements of the electric field in geophysical environments[J]. Journal of Geomagnetism and Geoelectricity, 1997, 49(11-12): 1677-1696.
[14] Petiau G. Second generation of lead-lead chloride electrodes for geophysical applications[J]. Pure and Applied Geophysics, 2000, 157(3): 357-382.
[15] Perrier F. Long-term stabilly and installion bias of Petiau clay electrodes[C]// 22nd EM Induction Workshop Weimar, 2014.
[16] 陆阳泉, 梁子斌, 刘建毅. 固体不极化电极的研制及其应用效果[J]. 物探与化探, 1999, 71(1):65-66.
[17] Lu Y Q, Liang Z B, Liu J Y. The development and application of solid nonpolarized electrodes[J]. Geophysical and Geochemical Exploration, 1999, 71(1): 65-66.
[18] 宋艳茹, 席继楼, 刘超, 等. 一种Pb-PbCl2不极化电极试验研究[J]. 地震地磁观测与研究, 2011, 32(6):97-103.
[19] Song Y R, Xi J L, Liu C, et al. Research on a type of Pb-PbCl2 non-polarizable electrode[J]. Seismological and Geomagnetic Observation and Research, 2011, 32(6): 97-103.
[20] 姜健. 井—地ERT不极化电极设计与性能研究[D]. 长春: 吉林大学, 2013.
[21] Jiang J. Design and performance of nonpolarized electrode for well ground ERT[D]. Changchun: Jilin University, 2013.
[22] 尚延杰. 固体不极化电极的研究与制作[D]. 成都: 成都理工大学, 2020.
[23] Shang Y J. Research and fabrication of solid non-polarized electrode[D]. Changdu: Chengdu University of Technology, 2020.
[24] Wang H, Egbert G, Yao Y, et al. Array analysis of magnetic and electric field observatories in China: estimation of magnetotelluric impedances at very long periods[J]. Geophysical Journal International, 2020, 222(1): 305-326.
[25] Solution technologiques pour L'Environment unpolarizable electrodes for self potentials measurements-PMS 9000[EB/OL].(2020-04-10) [2021-07-10] https://www.sdec-france.com/soil-science-equipment-sensor-pms9000.html.
[26] Wang H, Campanya J, Cheng J, et al. Synthesis of natural electric and magnetic Time-series using Inter-station transfer functions and time-series from a Neighboring site (STIN): Applications for processing MT data[J]. Journal of Geophysical Research Solid Earth, 2017, 122(8): 5835-5851.
[27] Kuvshinov A, Grayver A, Toffner-Clausen L, et al. Probing 3-D electrical conductivity of the mantle using 6 years of Swarm, CryoSat-2 and observatory magnetic data and exploiting matrix Q-responses approach[J]. Earth, Planets and Space, 2021, 73(1): 1-26.
[28] Egbert G D, Booker J R. Robust estimation of geomagnetic transfer functions[J]. Geophysical Journal International, 1986, 87(1): 173-194.
-
计量
- 文章访问数: 604
- PDF下载数: 148
- 施引文献: 0
下载: