Modeling of the MET Sensitive Element Conversion Factor on the Intercathode Distance.

Maksim Ryzhkov,Vadim Agafonov

doi:10.3390/s20185146

Abstract

MET sensors for measuring motion parameters are used in many scientific and technical fields. Meanwhile, the geometries of the transforming cell applied practically are far from optimal, and the influence of many geometric parameters on the sensitivity has not been studied. These parameters include the intercathode distance in a four-electrode conversion cell. In this paper, a mathematical model that allows calculating the behavior of the conversion coefficient depending on the frequency for a cell with flat electrodes at different intercathode distances is constructed. The stationary current is shown to decrease monotonically with the decreasing intercathode distance at the constancy of other system parameters. At the same time, the signal current decreases in the low-frequency region and increases in the high-frequency range. Taking into account the results obtained, practically speaking, it is advisable to reduce the intercathode distance to the technologically possible minimum, which makes the frequency response more uniform and reduces the current consumed by the sensitive element.

Highlights

IntroductionThe design of electrochemical motion sensors, known as molecular-electronic transfer (MET)
The design of electrochemical motion sensors, known as molecular-electronic transfer (MET)sensors, is based on a conversion element, which is an electrochemical cell made of several electrodes immersed in a channel filled with a highly conductive electrolyte solution [1,2]
Molecular iodine passes into triiodide, I2 + I− → I3−, which is the active component of the electrolyte solution

Summary

Introduction

The design of electrochemical motion sensors, known as molecular-electronic transfer (MET). Sensors, is based on a conversion element, which is an electrochemical cell made of several electrodes immersed in a channel filled with a highly conductive electrolyte solution [1,2]. The operation principle of this sensor is based on the dependence of the interelectrode current in the cell on the motion of the liquid in the specified channel. The movement of the liquid in the cell depends on the external mechanical influence. The main advantage of the MET sensors is high conversion rate of mechanical action into electrical signal. The MET-based sensors were used to measure low-frequency signals in seismometry [3,4,5,6]. The reason for a noticeable expansion of applications is the development of new types of converting elements providing a significant expansion of the working frequency range in the high-frequency region

Methods

Results

Discussion

Conclusion