基于时差法和TDC-GP2的超声波流量测量方法  

Method of Ultrasonic Flow Rate Measure Based on Delta-T and TDC-GP2

作　　者：姚滨滨[1] 张宏建[1] 唐晓宇[1] 周洪亮[1] 

机构地区：[1]浙江大学工业控制技术国家重点实验室,杭州310027

出　　处：《自动化与仪表》2011年第8期17-20,共4页Automation & Instrumentation

摘　　要：时差法超声波流量计是通过测量超声波在流体中的顺逆流传播时间差值而计算出流量值的,故传播时间差值的高精度测量是流量测量系统的关键。为了提高时间测量的精度,文中选用了TDC-GP2高精度时间测量芯片。该文详细介绍了基于TDC-GP2芯片的时差法超声波流量测量原理以及相应硬件测量电路的具体实现方法。经实验验证,用本方法测量流量其测量精度和分辨率均较高,有望推广应用。Delta-T method ultrasonic flow meter measures the flow rate through the measurement of the value of the Delta-T,which was the ultrasonic flow meter transmission time difference of the downstream and upstream,so the measurement of the transmission time was the key of the system.In order to improve the accuracy of time measurement,TDC-GP2 high precision time measurement chip was chosen in this paper.This paper introduces the flow measurement principle of Delta-T ultrasonic flow meter based on the TDC-GP2 chip and the implementation of corresponding hardware measurement circuit.After the experiment,this method has high measuring precision and resolution ratio and was promising to be applied.

关 键 词：时差法 TDC-GP2 超声波流量计 流量测量 MSP430F417 

分 类 号：TH81[机械工程—仪器科学与技术]