Global to push GA events into
skip to main content

Title: System for monitoring an industrial process and determining sensor status

A method and system for monitoring an industrial process and a sensor. The method and system include generating a first and second signal characteristic of an industrial process variable. One of the signals can be an artificial signal generated by an auto regressive moving average technique. After obtaining two signals associated with one physical variable, a difference function is obtained by determining the arithmetic difference between the two pairs of signals over time. A frequency domain transformation is made of the difference function to obtain Fourier modes describing a composite function. A residual function is obtained by subtracting the composite function from the difference function and the residual function (free of nonwhite noise) is analyzed by a statistical probability ratio test.
Inventors:
 [1];  [2];  [3]
  1. (Bolingbrook, IL)
  2. (Chicago, IL)
  3. (Columbia, MD)
Issue Date:
OSTI Identifier:
870950
Assignee:
ARCH Development Corporation (Chicago, IL) ANL
Patent Number(s):
US 5629872
Application Number:
08/631745
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
monitoring; industrial; process; determining; sensor; status; method; generating; signal; characteristic; variable; signals; artificial; generated; auto; regressive; moving; average; technique; obtaining; associated; physical; difference; function; obtained; arithmetic; pairs; time; frequency; domain; transformation; obtain; fourier; modes; describing; composite; residual; subtracting; free; nonwhite; noise; analyzed; statistical; probability; ratio; nonwhite noise; signal characteristic; frequency domain; difference function; signal generated; industrial process; residual function; probability ratio; process variable; composite function; signals associated; sensor status; artificial signal; average technique; moving average; statistical probability; obtain fourier; modes describing; domain transformation; dual function; fourier modes; arithmetic difference; physical variable; regressive moving; determining sensor; white noise; /702/

Similar records in DOepatents and OSTI.GOV collections: