发明名称 |
PRESSURE SENSOR FAULT DETECTION |
摘要 |
A diagnostic system for a pressure sensor (56) having a cavity (132, 134) configured to receive on applied pressure is provided. The cavity (132, 134) has a first and a second wall. A deflectable diaphragm (106) is positioned in the cavity and configured to form a first and a second capacitance with the first wall and a third and a fourth capacitance with the second wall which change in response to the applied pressure. The capacitances form a first transfer function and a second transfer function. Changes in the first transfer function relative to the second transfer function are detected to provide a diagnostic output. |
申请公布号 |
CA2640412(C) |
申请公布日期 |
2016.04.26 |
申请号 |
CA20072640412 |
申请日期 |
2007.01.22 |
申请人 |
ROSEMOUNT INC. |
发明人 |
HARASYN, DONALD E.;WILLCOX, CHARLES R.;KLOSINSKI, ANDREW J. |
分类号 |
G01L27/00;G01L9/00 |
主分类号 |
G01L27/00 |
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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