油气润滑ECT系统传感器设计
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摘要
运用SolidWorks软件和COMSOL软件建立三维ECT管道模型,通过分析与比较传感器在空/满场状态下的电容值得到了三个结构参数(电极的张角、极板的长度、管道与屏蔽层的间隔)的优化范围,并定义了传感器电容响应率指标、对传感器性能进行了定量分析。在此基础上,基于正交实验的方法,以传感器性能综合评价函数OPT为目标,运用COMSOL软件和Design-Expert软件对上述三个结构参数进行了优化。研究结果表明:①当传感器结构参数为最佳参数组合时,函数OPT值为7.2087,与实际仿真获得的OPT值之间的相对误差为3.36%;②设计的传感器具有较均匀的灵敏度分布和较高的成像质量。
A three-dimensional ECT pipeline model was established employing SolidWorks software and COMSOL software. The optimized range of three structural parameters(the opening angle of the electrode, the length of the electrode, and the interval between the pipe and the shielding layer) was obtained by analyzing and comparing capacitance value in the state of empty field and full field. The capacitive responsivity of the sensor was defined to analyze the sensor performance quantitatively. And then, based on the orthogonal experiment method, the comprehensive evaluation function OPT of sensor performance is used to optimize the above three structural parameters employing COMSOL software and Design-Expert software. The experimental results show that the value of function OPT is 7.2087 when the sensor structural parameters are the optimal combination, and the relative error is 3.36% between the OPT value obtained by the actual simulation. The sensor designed exhibits better sensitivity distribution and higher image quality.
A three-dimensional ECT pipeline model was established employing SolidWorks software and COMSOL software. The optimized range of three structural parameters(the opening angle of the electrode, the length of the electrode, and the interval between the pipe and the shielding layer) was obtained by analyzing and comparing capacitance value in the state of empty field and full field. The capacitive responsivity of the sensor was defined to analyze the sensor performance quantitatively. And then, based on the orthogonal experiment method, the comprehensive evaluation function OPT of sensor performance is used to optimize the above three structural parameters employing COMSOL software and Design-Expert software. The experimental results show that the value of function OPT is 7.2087 when the sensor structural parameters are the optimal combination, and the relative error is 3.36% between the OPT value obtained by the actual simulation. The sensor designed exhibits better sensitivity distribution and higher image quality.
引文
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[2]HUANG ZH Y,ZHAO J,WANG B L.Two-phase flow pattern visualization system based on electrical capacitance tomography technique[J].Chinese Journal of Scientific Instrument,2001,22(5):458-461.
[3]马敏,侯敏,刘鹏飞.航空发动机气路监测系统复合传感器优化设计[J].计算机仿真,2014,31(2):144-148,164.
[4]高彦丼,徐青.ECT系统在土壤湿度测量中的应用研究[J].控制工程,2016,23(7):1119-1122.
[5]孙启国,罗光旺,闫晓丹.最大类间方差法改进的ECT正则化图像重建算法[J].机械,2018(5):10-13,18.
[6]张立峰,王化祥.多相流电容层析成像系统的仿真研究[J].电力科学与工程,2005(1):5-7.
[7]李楠.相邻电容传感器设计及ECT技术研究[D].西安:西安电子科技大学,2010.
[8]郭红星,余胜生,保宗悌.电容层析成像的电场分布与反演[J].电子学报,2002,30(1):62-65.
[9]牟昌华,彭黎辉,姚丹亚.一种基于电势分布的电容成像敏感分布计算方法[J].计算物理,2006,23(1):87-92.
[10]Xie C G,Huang S M,Lenn C P,et al.Experimental evaluation of capacitance tomographic flow imaging systems using physical models[C].Circuits,Devices and Systems,IEE Proceedings-IEF,1994,141(5):357-368.
[11]杨明,唐彦峰.采用Design-Expert分析多参数对FDM成型的影响与优化设计[J].装备制造技术,2017(11):53-56.