[특허]System for monitoring an industrial process and determining sensor status

System for monitoring an industrial process and determining sensor status 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G21C-007/36 G06F-007/00
출원번호	US-0068713 (1993-05-27)
발명자 / 주소	Gross Kenneth C. (Bolingbrook IL) Hoyer Kristin K. (Chicago IL) Humenik Keith E. (Columbia MD)
출원인 / 주소	ARCH Development Corporation (Chicago IL 02)
인용정보	피인용 횟수 : 67 인용 특허 : 0

초록 ▼

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.

대표청구항 ▼

A method of testing at least one of an industrial process and at least a first and second sensor for determining fault conditions therein, comprising the steps of: operating the at least first and second sensor to redundantly detect at least one physical variable of the industrial process to provide a first signal from said first sensor and a second signal from said second sensor, each said signal being characteristic of the one physical variable; obtaining a difference function characteristic of the arithmetic difference pairwise between said first signal and said second signal at each of a plurality of different times of sensing the one physical variable; obtaining a frequency domain transformation of said first difference function to procure Fourier coefficients corresponding to Fourier frequencies; generating a composite function over time domain using the Fourier coefficients; obtaining a residual function over time by determining the arithmetic difference between the difference function and the composite function, the residual function having reduced serially correlated noise; operating on the residual function using computer means for performing a statistical analysis technique to determine whether an alarm condition is present in at least one of the industrial process and the at least first and second sensor, the residual function including white noise characteristics of an uncorrelated function of reduced skewness relative to the difference function and being input to the statistical analysis technique; and said at least first and second sensor providing alarm information to an operator of the industrial process allowing modification of at least one of the industrial process and said at least first and second sensor when an alarm condition is detected.

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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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System for monitoring an industrial process and determining sensor status 원문보기

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System for monitoring an industrial process and determining sensor status 원문보기

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이 특허를 인용한 특허 (67)

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