基于相关法的高精度超声波流量计的设计  

Design of Ultrasonic Flowmeter with High Precision Based on Correlation Algorithm

作　　者：杨舟[1] 韩宇杰[1] 王红[1] 杨士元[1] 范顺杰[2] 

机构地区：[1]清华大学自动化系,北京100084 [2]西门子(中国)研究院,北京100080

出　　处：《自动化与仪表》2011年第5期14-19,共6页Automation & Instrumentation

基　　金：国家自然科学基金项目(60773142)

摘　　要：基于相关法的超声波流量检测方法,能有效利用超声波脉冲的整体信息进行时差测量,具有精度高,抗干扰能力强等优点。同时相关法对测量过程中计算量需求大,对超声波脉冲的可配置性要求高,所需的硬件平台设计具有一定难度。作者设计并实现了一款基于相关法的超声波流量检测系统,利用高精度浮点DSP为数字核心,配合相应的模拟电路,实现高速计算、可配置、高频采样率的超声波流量检测过程,对小口径小流量的管道液体检测达到了纳秒级的精度。Ultrasonic flowmeter based on correlation algorithm make full use of information of the ultrasonic signal,which has the advantages of high precision and strong faculty of anti-noise and so on.To inplement the correlation algorithm,much amount of calculation in the system and configurable ultrasonic signal are needed,which adds difficulty for design.The author designed an ultrasonic flowmeter with high precision based on correlation algorithm with the cooperation of Siemens corporate technology,which uses a DSP as the digital core to inplement the correlation algorithm at high speed.With neccessary analog curcuit for configurable signal and sampling,the system reaches precision of nanosecond for pipline with small caliber and low flow rate.

关 键 词：超声波流量计 相关法 可配置脉冲 模拟电路 

分 类 号：TH814[机械工程—仪器科学与技术]