摘要
文中设计了一个阵列式结构的电容传感器系统,对液体管内含气率进行测量。首先,基于Comsol仿真软件对传感器的结构参数进行优化,并完成传感器的设计与制作。然后,设计用于极板工作状态切换的门电路和用于微小电容测量的C/V转换电路,再设计FPGA程序进行电路控制和上下位机通讯,并对上位机采集的信号进行滤波、解调。最后,用BP神经网络完成管道截面处的含气率重构。进一步采用可视化验证方法对电容传感器系统的准确性进行验证。电容传感器系统和可视化方法得到的平均截面含气率的偏差不超过8.48%,均值偏差为5.62%,均方根偏差为5.51%。设计的电容传感器系统具有很好的测量准确性。
In this study, a capacitance sensor system based on an array structure was designed to measure the gas-holdup in liquid pipe.Firstly, the structural parameters of the sensor were optimized by Comsol software, and its design and manufacture were completed.The gate circuit and C/V conversion circuit were designed, FPGA program was written for circuit control and communication between upper and lower machines.In addition, the signals collected by the host computer were filtered.Finally, BP(back propagation) neural network was used to reconstruct the gas-holdup at the pipeline section.In this study, a visual verification method was adopted to verify the accuracy of gas-holdup measurement.The deviation of the average section gas-holdup obtained by the gas holdup measurement and visualization method was no more than 8.48%,the mean deviation was 5.62%,and the root mean square deviation was 5.51%.The capacitance sensor system designed in this research has good measurement accuracy.
作者
何根平
柯伊宇
徐沧粟
李孝禄
杨孟洋
金杰
HE Gen-ping;KE Yi-yu;XU Cang-su;LI Xiao-lu;YANG Meng-yang;JIN Jie(Zhejiang Lantong Air Conditioning Equipment Limited Company,Lishui 323703,China;College of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou 310018,China;Key Laboratory of Intelligent Manufacturing Quality Big Data Tracing and Application of Zhejiang Province,Hangzhou 310018,China;College of Energy Engineering,Zhejiang University,Hangzhou 310027 China)
出处
《仪表技术与传感器》
CSCD
北大核心
2022年第11期23-28,共6页
Instrument Technique and Sensor
基金
丽水市2021年度“绿谷精英·创新引领行动计划”B类项目
浙江省自然科学基金(LY14E050023)
中国计量大学基础研究基金(2021YW79)
浙江省大学生科技创新活动计划(新苗人才计划)项目(2022R409036)。
关键词
气液两相流
含气率
电容传感器
神经网络
可视化
Comsol仿真软件
gas-liquid two-phase flow
gas-holdup
capacitance sensor
neural network
visualization
Comsol simulation software