A Portable Electric Field Detector With Precise Time Base for Transient Electromagnetic Radiation Source Location
A Portable Electric Field Detector With Precise Time Base for Transient Electromagnetic Radiation Source Location
复制标题
一种用于瞬态电磁辐射源定位的精确时基便携式电场探测器
DOI：
10.1109/tim.2019.2907775
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发表时间：
2020-04-01
影响因子：
5.6
通讯作者：
Kong, Xu
中科院分区：
文献类型：
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作者：
Li, Qi;Xie, Yan-Zhao;Kong, Xu
研制了一种具有精确时基、全波形存储和无线数据传输等特点的电场探测器，可与定位算法结合使用，实现大范围内瞬变电磁辐射源的精确定位。最大采样率为2gs /s，内存深度可调，最大可达128kb。根据天线长度的不同，测量范围从几百V/m到几十kV/m不等。在全球定位系统（GPS）的帮助下，时钟和探测器的位置可以同步。特别地，该信号触发的时间瞬间可以以几十纳秒的时间分辨率记录下来。因此，可以实现多个探测器之间精确的时基对准，这对定位精度至关重要。然后，通过第四代移动通信技术（4G）将信号、位置、瞬间等所有数据发送到远程服务器。标定结果表明，该探测器的带宽可在10 kHz ~ 500 MHz范围内变化，任意两个探测器的时基对准误差小于50 ns。利用电磁时间反转（EMTR）方法进行了实验，验证了该探测器的适用性和定位精度。该探测器可用于测量和定位雷电、局部放电或故障。
An electric field ( $E$ -field) detector with the features of precise time base, full-waveform storage, and wireless data transmission has been developed, which can be used in combination with location algorithm for accurate location of the transient electromagnetic radiation source over a large-scale area. The maximum sampling rate is 2 GS/s, and the memory depth is up to 128 kB and can be adjustable. The measurement range can be adjusted from hundreds of V/m to tens of kV/m with different lengths of antennas. With the help of the global positioning system (GPS), both the clock and the position of the detector can be synchronized. In particular, the time instant triggered by the signal could be recorded with the time resolution of tens of nanoseconds. Therefore, the precise time base alignment among multiple detectors could be achieved, which is crucial for location accuracy. Then, all data including the signal, the position, and the time instant could be sent to a remote server by the fourth-generation mobile (4G) communication technology. The calibration results show that the bandwidth of the detector could vary from 10 kHz to 500 MHz, while the time base alignment error between any two detectors is less than 50 ns. An experiment was performed by means of electromagnetic time reversal (EMTR) method to prove the applicability of the detector and its location accuracy. The detector could be used to measure and locate lightning, partial discharge, or fault.