Ultrasonic Signal Processing in UFM Based On Digital Polarity Correlation

In order to resolve the reliable recognization and procession of ultrasonic signal in ultrasonic flowmeters, an ultrasonic signal recognization and processing method was put forward in this paper based on digital polarity correlated algorithm, and because there were multiple maximal values after polarity correlation, a modified digital polarity correlation algorithm was also put forward for this kind of polarity correlation in this paper. A 4 ultrasonic standard signal is selected to immune to the noise, In the meantime it helps to increase the computing speed. Through software programming and physical experimentation, the result was certified that the stability of ultrasonic transmission times measure value is less than 0.2 %and the measurement accuracy of experiment is up to 0.25 %.
UFM ultrasonic signal processing cross–correlation digital polarity correlation
Li Yuezhong Wu Hualing Wu Weiwei Li changxi Hua Zhibin
Dept.of Control Sci.& Eng.,Huazhong Univ.of Sci.& Tech.,Wuhan 430074,China;Dept.of Electronic & Mech Dept.of Electronic & Mechanical Eng.,East China Institute of Tech..,Jiangxi,Fuzhou 344000,China Dept.of Control Sci.& Eng.,Huazhong Univ.of Sci.& Tech.,Wuhan 430074,China
国际会议
西安
英文
2007-08-16(万方平台首次上网日期,不代表论文的发表时间)