发明名称 |
Impulse line blockage detector systems and methods |
摘要 |
A differential pressure sensor is attached to a process via a high and a low pressure impulse line. An absolute pressure sensor is also attached to each impulse line. To determine if an impulse line is blocked, a noise signal is acquired from the corresponding absolute pressure sensor. A variance of the noise signal is determined and compared to a threshold. If the variance is less than the threshold, an impulse line blockage is indicated.
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申请公布号 |
US5680109(A) |
申请公布日期 |
1997.10.21 |
申请号 |
US19960669901 |
申请日期 |
1996.06.21 |
申请人 |
THE FOXBORO COMPANY |
发明人 |
LOWE, JUSTIN PETER;CLARKE, DAVID W. |
分类号 |
G01L13/00;F17D5/00;G01L9/00;G01L19/00;G01L19/12;G01L27/00;(IPC1-7):G08B21/00 |
主分类号 |
G01L13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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