基于多物理場電化學(xué)振動傳感器的仿真
[Abstract]:Electrochemical vibration sensor is widely used in the field of geophysical measurement, because of its advantages of good low frequency, high sensitivity and small volume, it can detect and predict natural disasters such as earthquake and tsunami in a timely and effective manner. Also able to explore the country's oil, natural gas and other resources. Although there are a large number of electrochemical vibration sensors in the market, it is still a difficult task to select and design suitable sensors in new applications. In this paper, the simulation of the multi-physical field electrochemical vibration sensor is studied in the following aspects: firstly, the main components and working principle of the sensor are described. On this basis, the mathematical model of the electrochemical vibration sensor based on multi-physical field is established, the transfer function of the electrochemical vibration sensor is derived, and the parameters that affect the performance of the sensor are determined. Secondly, the multi-physical field theory model of electrochemical vibration sensor is established by COMSOL Multiphysics finite element analysis software, and the electrochemical module in the software is used. The influence of the number of holes in the electrode and the insulating layer, the thickness of the electrode and the insulating layer, and the electrode arrangement on the electrode current were studied by coupling the hydrodynamic module and the thermodynamics module. Thirdly, the current output of the two kinds of electrodes under the influence of temperature, structural parameters and vibration intensity in the static and moving state of the sensor is studied. Various factors affecting thermal noise and natural convection noise are analyzed in order to optimize the electrode structure of sensor. The flow channel is optimized by changing the inlet and outlet structure parameters. The ideal structure of electrode and channel is summarized and put forward. Finally, the calibration of frequency response and dynamic range is carried out in the vibration measurement laboratory of Jilin University School of instrument and Electrical Engineering. The vertical calibration of the geophone is carried out by using the orthogonal homodyne laser interferometer. The sensitivity of the sensor is tested and compared with the simulation results to analyze the cause of the error.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TP212
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