矿用超声波气体流量计的研制  

Development of Mine Ultrasonic Gas Flowmeter

作　　者：胡嘉豪 全太锋 HU Jia-hao;QUAN Tai-feng(School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Key Laboratory of Signal and Information Processing of Chongqing,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学,信号与信息处理重庆市重点实验室,重庆400065

出　　处：《仪表技术与传感器》2020年第1期42-45,49,共5页Instrument Technique and Sensor

基　　金：信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003)

摘　　要：针对当前复杂的煤矿瓦斯抽放环境条件存在的接收信号干扰大、温度变化大等问题,提出了一种由自带增强型DSP处理指令以及具有浮点运算能力的STM32F4微处理器测量的系统设计。基于时差法检测原理,提出了发送端同步激励信号驱动电路、接收端两级信号放大处理电路以及温度补偿电路的具体解决方案,设计了一种矿用双声道超声波气体流量计,并在流量算法上进行了温度补偿和流场系数修正。该系统设计既简化了电路设计复杂性又保证了精确性。实验结果表明,该流量计测量精确、测量下限低且具有极高的稳定性。Aiming at the problems of large interference of received signals and large temperature variation in the current complex environment of gas drainage in coal mines,a system design of measurement based on STM32F4 microprocessor with enhanced DSP processing instructions and floating-point computing ability was proposed.Based on the principle of time difference method detection,a specific solution for the synchronous excitation signal driving circuit at the transmitting end,the two-stage signal amplification processing circuit at the receiving end and the temperature compensation circuit were proposed in this paper.A mine multi-channel ultrasonic gas flowmeter was designed.Temperature compensation and flow field coefficient correction were performed on the flow algorithm.The system design not only simplified the complexity of circuit design but also ensured the accuracy.Experimental result demonstrates that the proposed flowmeter has accurate measurement,low measurement limit and high stability.

关 键 词：瓦斯抽放 时差法 超声波气体流量计 STM32F4 渡越时间 温度补偿 

分 类 号：TH814[机械工程—仪器科学与技术]