碳纤维海洋电场电极探测机理和性能研究

基于提出的碳纤维电极对海洋电场探测机理模型，通过在信号放大器两端并联放电电阻，提高碳纤维电极对极差的稳定性，同时缩短稳定时间。建立了匀强电场，以评估不同大小的并联电阻对碳纤维电极对探测性能的影响。研究结果表明，输入电阻越小，电极对的极差越小和自噪声稳定越快；电极对极差稳定时间不大于2 h，稳定后的极差不大于0.1 mV，自噪声水平在1 Hz下处于2~5 nV/KF(]HzKF)]之间。

Research on Detection Mechanism and Performance of Carbon Fiber Electrode for Ocean Electric Field

A mechanism model of carbon fiber electrode for detecting the ocean electric field is established. Based on the proposed model, the stability of potential difference between carbon fiber electrodes is improved and its settling time is shorten by the parallel discharge resistances at both ends of signal amplifier. An uniform electric field was established to evaluate the influences of different parallel resistances on the detection performance of carbon fiber electrodes. The results show that the smaller the input resistance is, the smaller the potential difference is, and the faster the self-noise settling is. The settling time of potential difference between electrodes is not greater than 2 h, the potential difference after settling is not greater than 0.1 mV, and the self-noise level is in the range of 2-5 nV/KF(]HzKF)] at 1 Hz.