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
WO2007089463(A2)
申请公布日期
2007.08.09
申请号
WO2007US01576
申请日期
2007.01.22
申请人
ROSEMOUNT INC.;HARASYN, DONALD, E.;WILLCOX, CHARLES, R.;KLOSINSKI, ANDREW, J.
发明人
HARASYN, DONALD, E.;WILLCOX, CHARLES, R.;KLOSINSKI, ANDREW, J.