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基于DSP、具有谱分析功能的涡街流量计信号处理系统
引用本文:徐科军,吕迅,陈荣保,苏建徽,张崇巍.基于DSP、具有谱分析功能的涡街流量计信号处理系统[J].仪器仪表学报,2001,22(3):255-260,264.
作者姓名:徐科军  吕迅  陈荣保  苏建徽  张崇巍
作者单位:合肥工业大学自动化所
基金项目:机械工业技术发展基金和高校骨干教师资助项目
摘    要:本文介绍一种以数字信号处理器(DSP)为核心、具有谱分析功能的涡街流量计信号处理系统。它采用周期图谱分析方法对涡街流量计中传感器的信号进行数字处理,准确计算出信号的频率,测出准确的体积流量,它抗干扰能力强,保证现场测量精度,扩大量程比,现场显示,并适用于不同口径和测量不同流体的一次仪表,它采用了DSP,保证了处理的实时性。

关 键 词:涡街流量计  谱分析  快速傅里叶变换  数字信号处理器  DSP

A Signal Processing System of Vortex Flowmeter based on DSP with Spectrum Analyzing Function
Xu Kejun,Lu Xunhong,Chen Rongbao,Su Jianhui,ZHANG Chongwei.A Signal Processing System of Vortex Flowmeter based on DSP with Spectrum Analyzing Function[J].Chinese Journal of Scientific Instrument,2001,22(3):255-260,264.
Authors:Xu Kejun  Lu Xunhong  Chen Rongbao  Su Jianhui  ZHANG Chongwei
Abstract:A signal processing system of vortex flowmeter is presented in this paper. This system has the analyzing function of power spectrum based on a digital singnal processor (DSP). The sensor's signals in flowmeter are processed digitally by means of the power spectrum analyzing method based on the periodogram spectrum method. The real frequency of signal is calculated, and the accurate volumetric flow is measured. The system has interference-free function, ensures the measuring precision in fields. It improves the ratio of measuring range. It is suitable for flowmeters that have different bores and measure different fluids. It processes signals in real time because it uses a DSP.
Keywords:Vortex flowmeter  Spectrum analysis  Fast Fourier transform  Digital signal processor
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