作者：陈洁, 刁品高

作者单位：上海大学机电工程和自动化学院, 上海 200072

关键词：涡街流量计;信号处理;双通道;抗震动

摘要：

为提高涡街流量计的测量性能,提出一套双通道涡街流量计信号处理方法,通过测量通道与监测通道的配合,提升低流速的测量性能,运用脉动信号功率最大频率点周期估计算法,进一步提升测量的精度和抗震动性能,并设计基于MSP430的涡街信号处理系统。实验结果表明:该信号处理方法能有效提升涡街流量计的测量性能。

Signal processing method study and system design for vortex flowmeter

CHEN Jie, DIAO Pin'gao

School of Mechanical & Electronic Engineering and Automation, Shanghai University, Shanghai 200072, China

Abstract: To improve the measurement accuracy of the vortex flowmeter, this paper proposed a set of dual-channel vortex flowmeter signal processing method. By monitoring each channel's signal and controlling channel selection at work, the performance of low flow measurement was improved. The measurement accuracy and anti-vibration performance were further enhanced through software algorithms of the pulsating signal maximum power frequency point estimation, and designs the vortex signal processing system based on MSP430. Experimental data show that the signal processing method is effective to enhance the performance of vortex flowmeter.

Keywords: vortex flowmeter;signal processing;dual-channel;anti-vibration

2015, 41(2): 105-109  收稿日期: 2013-12-27;收到修改稿日期: 2014-3-14

基金项目: 

作者简介: 陈 洁(1979-),女,上海市人,讲师,博士,主要从事流量计技术研究。

参考文献

[1] 蔡武昌,孙淮清. 流量测量方法和仪表的选用[M]. 北京:化学工业出版社,2001:17-53.
[2] Matter W. Method and system for characterizing pulsatile flow in a vortex flowmeter:US,6386046 B1[P]. 2002-5-14.
[3] Klein L A. Vortex flowmeter with measured parameter adjustment: US,6658945[P]. 2003-11-9.
[4] Watta M. Vortex flowmeter: US,6480812 B1[P]. 2002-12-12.
[5] 徐科军,吕迅,陈荣保,等. 涡街流量计数字信号处理系统:中国,99101209.7[P]. 1999-10-12.
[6] 徐国梁. 高抗干扰智能型涡街流量计的研究[D]. 杭州:浙江大学,2003.
[7] 张涛,段瑞峰,孙宏军. 基于双核技术的数字涡街流量计信号处理系统[J]. 化工自动化及仪表,2004,31(6):71-74.
[8] 徐科军,汪枫. 涡街流量计信号处理的软件方法[J]. 仪表技术与传感器,1995(5):22-25.
[9] 徐科军,汪安民. 涡街流量计信号估计的自适应陷波方法[J].仪器仪表学报,2000,21(2):222-224.
[10] 徐科军,汪安民. 基于小波变换的涡街流量计信号处理方法[J]. 仪器仪表学报,2001,22(6):636-639.
[11] 李斌,陈洁,张伟卿,等. 一种双通道涡街流量计系统:中国,200710042749.2[P]. 2007-10-04.
[12] 李斌,陈洁,沈天飞,等. 脉动信号的功率最大频率点周期的估算方法:中国,201210066226.2[P]. 2012-10-06.