摘要
根据超声波时差法原理,研究气体组分和温度对测量结果的影响。采用一组收发一体式超声波换能器进行气体流量测量,设计了接收信号放大、滤波、比较电路,主控电路和对应控制程序,开发了气体组分和温度补偿程序,制作出高精度的超声波气体流量测量仪。空气流量测试结果表明:当空气流量为5.00 L/min时,该测量仪的测量精度可达±0.03 L/min。该测量仪还适用于不同气体类型的精确测量。
Based on the principle of ultrasonic time difference measurement,the influence of gas composition and temperature on the measurement results is analyzed.In order to make a high-precision ultrasonic gas flow measuring instrument,a set of transmitter-receiver integrated ultrasonic transducers is used to measure gas velocity,and then the circuits for receiving amplified,filtered and contrasted signals are designed with a main control circuit and corresponding control program.Besides,gas component and temperature compensation programs are developed.The experimental results show that the measurement accuracy of the system can reach±0.03 L/min when the air flow is 5.00 L/min.The system is also suitable for accurate measurement of different gas types.
作者
王富铮
陈军
谢海鹤
潘晓伟
林振衡
WANG Fuzheng;CHEN Jun;XIE Haihe;PAN Xiaowei;LIN Zhenheng(School of Electromechanical and Information Engineering,Putian University,Putian Fujian 351100,China)
出处
《莆田学院学报》
2021年第5期58-62,共5页
Journal of putian University
基金
福建省自然科学基金资助项目(2019J01811,2018J01557)
莆田市科技项目(2020GJGZ001)。
关键词
超声波换能器
气体流量
温度补偿
气体组分补偿
ultrasonic transducer
gas flow
temperature compensation
gas component compensation
