发明名称 |
Plant parameter detection by monitoring of power spectral densities |
摘要 |
A method for determining whether a current state of a process variable output signal is within acceptable limits includes the following steps: establishing reference data by sampling a plant's process variable output signal when the plant is operating at steady state and analyzing the sampled output signal to derive normalized reference data including an energy content of each of a plurality of frequency components of the sampled output signal. The procedure establishes a current operational data base by sampling a process variable signal when the plant is in operation. The sampled current output signal is analyzed to derive current data including a normalized energy content of each of a plurality of its frequency components. For each common frequency component of the reference data and the current data, the procedure compares their normalized energy contents and issues a non-steady state signal if the comparison indicates that the compared energy contents exceed a predetermined limit. |
申请公布号 |
AU4376996(A) |
申请公布日期 |
1996.06.26 |
申请号 |
AU19960043769 |
申请日期 |
1995.12.07 |
申请人 |
EXXON CHEMICAL PATENTS INC. |
发明人 |
RAYMOND DONALD BARTUSIAK;DOUGLAS HUGH NICHOLSON |
分类号 |
G01D21/00;B01J19/00;G01R23/16;G05B23/02;H02H3/00 |
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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