FFT周期图法在流速测量系统中的应用  

Application of FFT Periodogram to Flow Rate Measurement System

作　　者：刘骏[1] 周孟然[1] 罗倩[1] 闫鹏程[1] 彭皆彩 

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《河南科技大学学报（自然科学版）》2016年第3期33-37,6,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家"十二五"科技支撑计划基金项目(2013BAK06B01)

摘　　要：针对测量水体流量的一般方法存在精度不够和抗干扰性能差等问题,以数字信号处理器为主控制器,结合快速傅里叶变换周期图法搭建突水流速测量系统。试验结果表明:该方法不仅能够扩大测量的量程,降低流量下限测量值,而且可提高测量精度,增加抗噪音干扰性能。For the low precision and poor anti-jamming performance in measuring water flow via general methods,the fast Fourier transform( FFT) periodogram method was proposed. With digital signal processor as the main controller,FFT periodogram method was used to build water inrush velocity measurement system.Experimental analysis results show that the method not only can enlarge the range of measurement and reduce the flow limit measured values,but also improve the measurement precision and increase the noise robustness.

关 键 词：快速傅里叶变换 周期图法 涡街流量计 流速测量 数字信号处理器 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]