Research on Sensitivity of Ag/AgCl Electrode to the ELFE

Abstract

A device transmitted alternating electric field signal under water was designed to test the sensitivity of Ag/AgCl electrode to the ELFE. The uniformity of ELFE signal inside the device was tested by solid powder-pressed Ag/AgCl electrode at several place selected in the vertical direction and the horizontal directio. Then, Ag/AgCl electrode simples fabricated by three kinds of technology were tested in the device to contrast the sensitivity of them. Experimental results show that the potential difference between detecting electrodes were proportional to the electrodes spacing. As change the vertical depth of detection electrode from the surface, the testing result did not change. After contrasting test, the results of solid powder-pressed Ag/AgCl electrode were the best. So it is more suitable to be the ELFE detection sensor. With the development of marine exploration and detection, Extremely Low Electric Field (ELEF) detection has become an important research project [. High performance electric field electrode is essential to ocean exploration. Currently, the research of detecting electrode is in infancy. Although the published papers on electrode self-noise and long-term stability are many [2], the sensitivity of detecting electrode was researched less [3]. As the main solute of seawater are strong electrolyte, the high-frequency electric field can be attenuated by the seawater in the transmitting process [4]. Only the ELEF can be detected under seawater from long distance. According to the electric signal transmitting characteristics underwater, a device transmitted alternating electric field signal under water was designed to test the sensitivity of Ag/AgCl electrode to the ELFE[5]. The uniformity of ELFE signal inside the device was tested by solid powder-pressed Ag/AgCl electrode at several place selected in the vertical direction and the horizontal direction. Then, Ag/AgCl electrode simples fabricated by three kinds of technology were tested in the device to contrast the sensitivity of them.