提高超声流量计性能的方法  

Method for improving perfermance of altrasonic flowmeter

作　　者：刘存[1] 魏永广[1] 窦曦光[2] 

机构地区：[1]沈阳工业大学信息科学与工程学院,辽宁沈阳110023 [2]沈阳化工学校,辽宁沈阳110023

出　　处：《沈阳工业大学学报》1999年第2期146-148,共3页Journal of Shenyang University of Technology

摘　　要：讨论了超声波测量管道内流体流量的时差法及其性能的改进方法．采用时差相差转换提高时间的测量精度，而用设置测量窗口、脉冲宽度鉴别及双门限相位测量等方法，有效地提高了系统的稳定性和可靠性．This paper discussed the time difference method of measuring flow in pipes and improving the measurenent performence. The method transformed the test parameter from time difference into phase difference for improving precision. It also set a signal window and distinguished pulse width and used double threshold, thus stability and reliability of the system was improved.

关 键 词：流量测量 锁相 窗口 门限 超声流量计 脉宽检测 

分 类 号：TH814.92[机械工程—仪器科学与技术]