基于超声波流量计的流速模拟器设计  

Study of self-gain control circuit of ultrasonic flow-meter

作　　者：赵俊奎 刘权 王燕 黎江林 杨振菊 付航 ZHAO Junkui;LIU Quan;WANG Yan;LI Jianglin;YANG Zhenju;FU Hang(Chongqing Chuanyi Automation Co.,Ltd.,Chongqing,401121 China;Yokogawa Sichuan Instrument Co.,Ltd.,Chongqing,400707 China)

机构地区：[1]重庆川仪自动化股份有限公司,重庆401121 [2]重庆横河川仪有限公司,重庆400707

出　　处：《自动化与仪器仪表》2023年第4期294-297,共4页Automation & Instrumentation

摘　　要：为了解决超声波流量计必须在管道以及流体都存在的情况下才可以进行信号链路功能测试的不便性,设计了一种专门针对超声波流量计的流速模拟系统。流速模拟系统以FPGA为核心,实现了对待测超声波流量计发射起始时间点的检测以及模拟回波信号的产生。通过分别测量顺流和逆流两种情况下的渡越时间差,计算被测流体的流速和流量,并进行数据分析,方便快捷地实现了对超声波流量计收发信号链路的功能验证。In order to solve the inconvenience of the signal link function test only when the ultrasonic flowmeter must cooperate with the pipeline and the fluid exists,this research designs a flow velocity simulation system specially designed for the ultrasonic flowmeter.The flow rate simulation system takes FPGA as the core,and realizes the monitoring of the starting time point of the ultrasonic flowmeter to be measured and the generation of the simulated echo signal.By measuring the transit time difference under two conditions of forward flow and reverse flow respectively,calculating the flow velocity and flow rate of the measured fluid,and performing data analysis,the functional verification of the ultrasonic flowmeter’s transceiver signal link is conveniently and quickly realized.

关 键 词：流速模拟器 超声波流量计 换能器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]