【摘要】：電化學(xué)振動(dòng)傳感器在地球物理測(cè)量領(lǐng)域中有著較為廣泛的應(yīng)用前景,因其具有低頻性好、靈敏度高、體積小等優(yōu)點(diǎn),能夠?qū)Φ卣�、海嘯等自然災(zāi)害進(jìn)行及時(shí)有效的檢測(cè)及預(yù)報(bào),還能夠?qū)业氖汀⑻烊粴獾荣Y源進(jìn)行勘察探索。盡管在市面上已經(jīng)有大量的電化學(xué)振動(dòng)傳感器,在新的應(yīng)用領(lǐng)域中選擇和設(shè)計(jì)合適的傳感器仍是一個(gè)艱巨的任務(wù)。針對(duì)多物理場(chǎng)電化學(xué)振動(dòng)傳感器的仿真展開研究,本文主要進(jìn)行了以下幾方面研究:首先闡述其主要組成部分及其工作原理,在此基礎(chǔ)上建立基于多物理場(chǎng)電化學(xué)振動(dòng)傳感器的數(shù)學(xué)模型,推導(dǎo)電化學(xué)振動(dòng)傳感器傳遞函數(shù),并確定了影響傳感器性能的各項(xiàng)參數(shù)。其次,通過COMSOL Multiphysics有限元分析軟件建立電化學(xué)振動(dòng)傳感器的多物理場(chǎng)理論模型,并利用軟件中的電化學(xué)模塊、流體動(dòng)力學(xué)模塊和熱力學(xué)模塊進(jìn)行耦合研究傳感器中電極與絕緣層孔數(shù)、電極與絕緣層厚度、電極排列方式等因素對(duì)電極電流的影響。再次,研究傳感器靜止和運(yùn)動(dòng)狀態(tài)下,在溫度、結(jié)構(gòu)參數(shù)、振動(dòng)強(qiáng)度的影響下兩種電極的電流輸出情況。對(duì)影響熱噪聲、自然對(duì)流噪聲等因素進(jìn)行了多方面分析從而優(yōu)化傳感器敏感元件的電極結(jié)構(gòu)。還通過改變流道出入口結(jié)構(gòu)參數(shù),對(duì)流道進(jìn)行優(yōu)化�？偨Y(jié)并提出理想的電極與流道的結(jié)構(gòu)。最后,在吉林大學(xué)儀器與電氣工程學(xué)院的振動(dòng)測(cè)量實(shí)驗(yàn)室超低頻振動(dòng)基準(zhǔn)裝置上進(jìn)行了頻響與動(dòng)態(tài)范圍校準(zhǔn),采用正交零差激光干涉測(cè)振儀,對(duì)被測(cè)檢波器作垂直向的標(biāo)定,測(cè)試出傳感器的靈敏度,并與仿真結(jié)果進(jìn)行對(duì)比,分析誤差產(chǎn)生的原因。
[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(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP212

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