发明授权
US06169965A Fluid property and flow sensing via a common frequency generator and FFT
失效
通过公共频率发生器和FFT进行流体特性和流量检测
- 专利标题： Fluid property and flow sensing via a common frequency generator and FFT
- 专利标题（中）： 通过公共频率发生器和FFT进行流体特性和流量检测
-
申请号： US09001453申请日： 1997-12-31
-
公开(公告)号： US06169965A公开(公告)日： 2001-01-02
- 发明人: David Kubisiak , Ulrich Bonne
- 申请人： David Kubisiak , Ulrich Bonne
- 主分类号： G01N2500
- IPC分类号： G01N2500
摘要：
A method and apparatus for using a common frequency generator for measuring selected properties of a fluid of interest via one or more heater and/or sensor elements. The common frequency generator may sequentially and/or simultaneously provide input signals to selected heater and/or sensor elements. Application of more than one frequency component by the common frequency generator enables the determination of one or more time and/or phase lags more efficiently, especially when using an FFT analysis technique. From the time and/or phase lags, the selected fluid properties including fluid flow speed can be determined.