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CA2208220A1 - Plant parameter detection by monitoring of power spectral densities - Google Patents

Plant parameter detection by monitoring of power spectral densities

Info

Publication number
CA2208220A1
CA2208220A1 CA 2208220 CA2208220A CA2208220A1 CA 2208220 A1 CA2208220 A1 CA 2208220A1 CA 2208220 CA2208220 CA 2208220 CA 2208220 A CA2208220 A CA 2208220A CA 2208220 A1 CA2208220 A1 CA 2208220A1
Authority
CA
Canada
Prior art keywords
output signal
current
plant
process variable
reference data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2208220
Other languages
French (fr)
Other versions
CA2208220C (en
Inventor
Raymond Donald Bartusiak
Douglas Hugh Nicholson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Chemical Patents Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/353,474 external-priority patent/US5790413A/en
Application filed by Individual filed Critical Individual
Publication of CA2208220A1 publication Critical patent/CA2208220A1/en
Application granted granted Critical
Publication of CA2208220C publication Critical patent/CA2208220C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Testing And Monitoring For Control Systems (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

A method for determining whether a current state of a process variable output signal is within acceptable limits includes the following steps: establising 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.
CA 2208220 1994-12-09 1995-12-07 Plant parameter detection by monitoring of power spectral densities Expired - Fee Related CA2208220C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/353,474 US5790413A (en) 1993-03-22 1994-12-09 Plant parameter detection by monitoring of power spectral densities
US08/353,474 1994-12-09
PCT/US1995/015933 WO1996018110A1 (en) 1994-12-09 1995-12-07 Plant parameter detection by monitoring of power spectral densities

Publications (2)

Publication Number Publication Date
CA2208220A1 true CA2208220A1 (en) 1996-06-13
CA2208220C CA2208220C (en) 2000-08-29

Family

ID=29552578

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2208220 Expired - Fee Related CA2208220C (en) 1994-12-09 1995-12-07 Plant parameter detection by monitoring of power spectral densities

Country Status (1)

Country Link
CA (1) CA2208220C (en)

Also Published As

Publication number Publication date
CA2208220C (en) 2000-08-29

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