Electrochemical accelerometer with DC response, experimental and theoretical study

Agafonov, Vadim M.; Egorov, Egor V.

doi:10.1016/j.jelechem.2015.12.003

Cited by 7 publications

(5 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect is conditioned by the influence of the electric field on the charge transfer and is manifested only at the lowest frequencies, provided the cathode spacings are noticeably larger than the cathode–anode distance. In [ 21 ], the linearity of the signal conversion in relation to the intercathode distance was studied and nonlinear effects were shown to decrease with the decreasing distance. In addition, note that, from the known variety of configurations of the converting element, planar systems are of the most interest, as the electrodes in them are placed on the channels walls [ 19 , 22 , 23 , 24 , 25 ] due to the simplicity of manufacture and wide possibilities for selecting the converter geometry to achieve optimal output characteristics.…”

Section: Introductionmentioning

confidence: 99%

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

Рыжков¹,

Agafonov²

2020

Sensors

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Рыжков¹,

Agafonov²

2020

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…Because the model is highly nonlinear, it needs to be approximated by the time measurement of multiple lengths and scales. It is assumed that the electrolyte is electrically neutral in the entire process, the concentration of active ions is relatively small compared to the concentration of the background electrolyte [13,14]. Since the whole electrolyte is electrically neutral, the concentration gradient of the effectively charged ions and the current density in the electrolyte obey Ohm's law:…”

Section: Numerical Modelmentioning

confidence: 99%

Inlet Effect Caused by Multichannel Structure for Molecular Electronic Transducer Based on a Turbulent-Laminar Flow Model

Zhou

Chen

et al. 2020

Sensors

View full text Add to dashboard Cite

The actual fluid form of an electrolyte in a molecular electronic converter is an important factor that causes a decrease in the accuracy of a molecular electronic transducer (MET) liquid motion sensor. To study the actual fluid morphology of an inertial electrolyte in molecular electron transducers, an inlet effect is defined according to the fluid morphology of turbulent-laminar flow, and a numerical simulation model of turbulent-laminar flow is proposed. Based on the turbulent-laminar flow model, this paper studies the variation of the inlet effect intensity when the thickness of the outermost insulating layer is 50 µm and 100 µm, respectively. Meanwhile, the changes of the inlet effect intensity and the error rate of central axial velocity field are also analyzed when the input signal intensity is different. Through the numerical experiment, it verifies that the thickness of the outermost insulating layer and the amplitude of the input signal are two important factors which can affect the inlet effect intensity and also the accuracy of the MET. Therefore, this study can provide a theoretical basis for the quantitative study on the performance optimization of a MET liquid sensor.

show abstract

“…The interaction of the chemical reaction and fluid motion in the form of the proportional ion concentration gradient ∇C generated by acceleration a causes the current between the anodes and cathodes to change. The differential current from the two cathodes, which is the output of the sensing element, also forms the input to the signal conditioning circuit for the next process [6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

AC Equivalent Circuit Model of an Electrochemical Accelerometer for 3D Numerical Simulation in the Low-Frequency Range

Zhou

Chen

et al. 2019

Energies

View full text Add to dashboard Cite

The electrochemical principles presented in this paper can be applied to the manufacture of vibration sensors for oil and gas exploration, as well as long-period vibration sensors for the observation of natural earthquakes. To facilitate the manufacture of high-volume electrochemical accelerometer (EAM), this paper presents an AC equivalent circuit model of an EAM in a low-frequency range. A 3D time-dependent numerical simulation based on finite element analysis was designed to combine a complex chemical reaction with electric circuit theory. A sensitive chip channel model was constructed by using partial differential equations and the problem caused by a designed mathematical model was solved by using multi-physics finite element analysis. When the electrochemical properties of an electrochemical vibration sensor and its design parameters as well as the parameters of the AC equivalent circuit model are considered, the abstract processing of the sensor on the equivalent circuit is better accomplished. The effectiveness of the proposed simulation model and the equivalent circuit model were verified by comparing the amplitude-frequency characteristic curve of the equivalent circuit with the amplitude-frequency characteristic curve of the single-channel simulation model of the sensitive chip. These model not only have great significance for the design guidance of an external conditioning circuit but also provide an effective method to decouple the output signal and noise of the sensor reaction cavity.

show abstract

Electrochemical accelerometer with DC response, experimental and theoretical study

Cited by 7 publications

References 27 publications

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

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

Inlet Effect Caused by Multichannel Structure for Molecular Electronic Transducer Based on a Turbulent-Laminar Flow Model

AC Equivalent Circuit Model of an Electrochemical Accelerometer for 3D Numerical Simulation in the Low-Frequency Range

Contact Info

Product

Resources

About