发明名称 |
TRANSMITTER FREEZE/FAULT DETECTION |
摘要 |
The method for detecting in a controlled apparatus and process the freezing or failure of a sensing process and assembly comprising a sensor generating a sensor output signal and related components converting the sensor output signal into a process signal derived from the sensor output signal, with the sensor being subjected to continuous transient variations due to process noise in the controlled apparatus and process, comprises the steps of: determining in real-time processing mode an estimate of the standard deviation of the process signal, comparing the estimate of the standard deviation of the process signal with at least one predetermined reference value, and producing an unacceptability signal if the comparison results in the determination of unacceptable deviation between the compared values. Further, an apparatus for detecting in a controlled apparatus and process the freezing or failure of a sensing process and assembly is described. |
申请公布号 |
WO9514262(A1) |
申请公布日期 |
1995.05.26 |
申请号 |
WO1993US11303 |
申请日期 |
1993.11.19 |
申请人 |
THE DOW CHEMICAL COMPANY;WALTER, HILGER, A.;GAGNE, RONALD |
发明人 |
WALTER, HILGER, A.;GAGNE, RONALD |
分类号 |
G01D21/00;G01D3/08;G05B9/02;G05B23/02 |
主分类号 |
G01D21/00 |
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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