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US5469447A
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Apparatus for selecting a valid signal from a plurality of redundant measured and modelled sensor signals
Assignee: General Electric Co
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Filing: 1994-10-28
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Granted: 1995-11-21
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Expires: 2014-10-28
Abstract
Abstract The present invention provides a method and an apparatus for selecting a valid signal from a plurality of redundant sensor signals wherein the sensor signals may include a plurality of measured and modelled signals. The invention comprises a circuit for generating a plurality of first pass/fail signals by performing a series of tests on the sensor signals. The invention further comprises circuitry for assigning a plurality of weighted values to each of the measured sensor signals according to the first and second pass/fail signals wherein the second pass/fail signals are initialized as pass signals. The invention further comprises of circuitry for summing the weighted values for each measured sensor signal and generating second pass/fail signals for each measured sensor signal. The invention also includes circuitry for assigning selection flags to each sensor signal according to the first and second pass/fail signals and circuitry for selecting the valid signal from the selection flags.
Inventors
- 👤 George A. Brunemann, Jr.
- 👤 Paul R. Reismiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:18
CPC Classifications
G; G05; G05B; G05B9/00; G05B9/02; G05B9/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
210 words
An apparatus for selecting a valid signal from among a plurality of redundant sensor signals comprising: a plurality of rate/range test circuits for receiving a first measured signal input and outputting a respective ranger/rate flag; a plurality of comparison signal test circuits for comparing said first measured signal input to a modeled signal input and for outputting a respective first comparison flag; a plurality of comparison signal test circuits for comparing said first measured input signal to a second measured input signal, and for outputting a respective second comparison flag; a plurality of validity filters, each having as an input a filter increment signal, and each outputting a respective validity flag; and validation logic for receiving as inputs said validity flags, said range/rate flags, and said first second comparison flags, and for providing as outputs a plurality of selection flags each selected according to a weighted value of said range/rate flags, said comparison flags, and said validity flags, and for generating a plurality of measured filter increment signals each having a magnitude and sign according to the weight value of said range/rate flags, said comparison flags, and said validity flags where the most negative value represents a valid measured signal and the most positive value represents an invalid measured signal.
Claim 2
Independent Claim
210 words
An apparatus for selecting a valid signal from among a plurality of redundant sensor signals comprising: a plurality of rate/range test circuits for receiving a first measured signal input and outputting a respective ranger/rate flag; a plurality of comparison signal test circuits for comparing said first measured signal input to a modeled signal input and for outputting a respective first comparison flag; a plurality of comparison signal test circuits for comparing said first measured input signal to a second measured input signal, and for outputting a respective second comparison flag; a plurality of validity filters, each having as an input a filter increment signal, and each outputting a respective validity flag; and validation logic for receiving as inputs said validity flags, said range/rate flags, and said first second comparison flags, and for providing as outputs a plurality of selection flags each selected according to a weighted value of said range/rate flags, said comparison flags, and said validity flags, and for generating a plurality of measured filter increment signals each having a magnitude and sign according to the weight value of said range/rate flags, said comparison flags, and said validity flags where the most negative value represents a valid measured signal and the most positive value represents an invalid measured signal.
Claim 3
Dependent Claim
28 words
An apparatus according to claim 1, wherein: said validity filter logic comprises means for summing each current filter increment input value to the previously stored filter increment value.
Claim 4
Dependent Claim
90 words
The apparatus according to claim 2, wherein said validity filter logic further comprises; means for initially setting said validity flags to pass state; means for setting said validity flag to an invalid state when said summed value reaches an upper limit; means for resetting said validity flag to a valid state when said summed value reaches an lower limit; and means for latching said validity flag to an invalid state when it has been set to an invalid state and reset to a valid state a predetermined number of times.
Claim 5
Dependent Claim
29 words
The apparatus according to claim 1, wherein: each said range/rate test circuit comprising means for generating a range/rate flag when said measured signal values are outside a predetermined range.
Claim 6
Dependent Claim
31 words
The apparatus according to claim 4 wherein: each said range/rate test circuit comprising means for generating a range/rate flag when said measured signal's rate of change is outside a predetermined limit.
Claim 7
Dependent Claim
33 words
The apparatus according to claim 1 wherein: each said comparison signal test circuit comprising means for generating a comparison flag when said measured signal values do not substantially equal the corresponding input signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-11-20 | 1999-05-22 | 1999-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-11-20 | 2003-05-22 | 2003-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-11-20 | 2007-05-22 | 2007-11-21 | $7700.00 | Window Closed / Lapsed |