干旱区生态环境知识资源中心(Arid): 一种新型地球物理电容性电场传感器研究

Arid

	一种新型地球物理电容性电场传感器研究
其他题名	Research on a novel capacitive electric field sensor for geophysical prospecting
	王志宇 1; 王顺 2; 张群英 2; 方广有 2
来源期刊	仪器仪表学报
ISSN	0254-3087
出版年	2016
卷号	37 期号:12 页码:2678-2685
中文摘要	当前在地球物理勘探中使用的电场传感器探头一不极化电极存在一些不足,如要求电极具有较低的接地阻抗,这使其在沙漠、冻土、戈壁等高阻区应用较为困难。分析了电场传感器系统的等效电路,指出低频电容性电场传感器应用在地球物理电法勘探中的可能性,并设计出一种低频电容性电场传感器,该电场传感器可直接放置于地面,进行地电场的测量。为提高电场传感器测量的准确性,采用输入电容中和技术以抑制耦合电容变化所带来的测量误差。该电场传感器工作频率为0.1~lkHz。外场测试表明,该电场传感器具备准确测量地电场信号的能力,在工作频率范围内获得与不极化电极相似的测量结果,幅值差异小于5%。该电场传感器在高阻区的地球物理勘探领域具有较好的应用前景。
英文摘要	Non-polarizable electrode - an electric field sensor currently used in geophysical prospecting has two major deficiencies: the systematic errors caused by poor electrical contact in high resistive terrains, such as desert, frozen soil, gobi and etc,the environmental damage associated with using non-polarizable electrodes. This paper analyzes the equivalent circuit of the electric field sensor system, and points out the possibility of applying the low-frequency capacitive electric field sensor in geophysical prospecting. A new capacitive electric field sensor is designed,which can be placed on the ground directly and carry out ground electric field measurement through weak capacitive coupling. In order to improve the measurement accuracy of the electric field sensor,the input capacitance neutralization technique is adopted to suppress the measurement error brought by the coupling capacitance change in the detection circuit.With the capacitance neutralization technique, the transmission coefficient of the capacitive electric field sensor is remained stable when environmental conditions change. The operating frequency band range of the electric field sensor is 0.1 Hz to 1 kHz; simulation and field test results indicate that the capacitive electric field sensors could measure the geoelectric field signal accurately. In the operation frequency range, the obtained measurement result is similar to that obtained using non-polarizable electrode, the amplitude difference between the results using non-polarizable electrode and capacitive electric field sensor is less than 5%. The proposed capacitive electric field sensors are well suited for current geophysical prospecting systems, such as multi-channel transient electromagnetic system. The proposed capacitive electric field sensors have a good application prospect in geophysical prospecting in high resistive terrains.
中文关键词	地球物理勘探 ; 不极化电极 ; 电容性电场传感器 ; 输入电容中和技术
英文关键词	geophysical prospecting non-polarizable electrode capacitive electric field sensor input capacitance neutralization technique
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENGINEERING MECHANICAL
WOS研究方向	Engineering
CSCD记录号	CSCD:5894720
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235229
作者单位	1.中国科学院大学, 中国科学院电磁辐射与探测技术重点实验室, 北京 100049, 中国; 2.中国科学院电子学研究所, 中国科学院电磁辐射与探测技术重点实验室, 北京 100190, 中国
推荐引用方式 GB/T 7714	王志宇,王顺,张群英,等. 一种新型地球物理电容性电场传感器研究[J],2016,37(12):2678-2685.
APA	王志宇,王顺,张群英,&方广有.(2016).一种新型地球物理电容性电场传感器研究.仪器仪表学报,37(12),2678-2685.
MLA	王志宇,et al."一种新型地球物理电容性电场传感器研究".仪器仪表学报 37.12(2016):2678-2685.