Patent US3633009A successfully refreshed from Google Patents.
US3633009A
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Automatic joint probability calculation of noise corrupted process measurements
Assignee: Leeds and Northrup Co
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Filing: 1970-01-19
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Granted: 1972-01-04
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Expires: 1990-01-19
Abstract
Abstract A method for automatically calculating from a noise corrupted process measurement a quantity whose value is indicative of the probability that a process disturbance has occurred which caused the measurement to vary in such a way that it does not fit the statistical model for the expected noise at a particular reference level.
Inventors
- 👤 Thomas A Green
- 👤 Charles W Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
G; G06; G06F; G06F17/00; G06F17/10; G06F17/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
The method for automatically determining from a noise corrupted process measurement a quantity indicative of the probability that the measurement represents a controllable process disturbance associated with a predetermined level of deviation of the measurement from its desired value which comprises the steps of automatically comparing the deviation of the measurement from its desired value to the predetermined level, automatically measuring the duration of time (ti) that said deviation exceeds said predetermined level, and automatically calculating the probability indicative quantity for said predetermined level as a function of sigma ''i being the predetermined level, sigma the standard deviation and Alpha the average time between zero crossings for the statistical model of the noise.
Claim 2
Independent Claim
113 words
The method for automatically determining from a noise corrupted process measurement a quantity indicative of the probability that the measurement represents a controllable process disturbance associated with a predetermined level of deviation of the measurement from its desired value which comprises the steps of automatically comparing the deviation of the measurement from its desired value to the predetermined level, automatically measuring the duration of time (ti) that said deviation exceeds said predetermined level, and automatically calculating the probability indicative quantity for said predetermined level as a function of sigma ''i being the predetermined level, sigma the standard deviation and Alpha the average time between zero crossings for the statistical model of the noise.
Claim 3
Dependent Claim
19 words
The method of claim 1 in which the function of gamma ( sigma ''i, ti) can be expressed as
Claim 4
Dependent Claim
33 words
The method of claim 1 in which the measurement is obtained from periodically sampled data and the steps of automatically comparing, automatically measuring and automatically calculating are carried out during each sample period.
Claim 5
Independent Claim
140 words
The method for automatically determining from a noise corrupted process measurement a set of values for a quantity indicative of the probability that the measurement represents a controllable process disturbance associated with a corresponding set of predetermined levels of deviation of the measurement from its desired value which comprises the steps of automatically comparing the deviation of the measurement from its desired value to each of the predetermined levels, automatically measuring the duration of time (ti) that said deviation exceeds each of said predetermined levels, and automatically calculating the probability indicative quantity for each of said predetermined levels as a function of gamma ( sigma ''i, ti), where sigma ''i being that predetermined level of the set being considered, Alpha being the standard deviation and Alpha being the average time between zero crossings for the statistical model of the noise.
Claim 6
Independent Claim
140 words
The method for automatically determining from a noise corrupted process measurement a set of values for a quantity indicative of the probability that the measurement represents a controllable process disturbance associated with a corresponding set of predetermined levels of deviation of the measurement from its desired value which comprises the steps of automatically comparing the deviation of the measurement from its desired value to each of the predetermined levels, automatically measuring the duration of time (ti) that said deviation exceeds each of said predetermined levels, and automatically calculating the probability indicative quantity for each of said predetermined levels as a function of gamma ( sigma ''i, ti), where sigma ''i being that predetermined level of the set being considered, Alpha being the standard deviation and Alpha being the average time between zero crossings for the statistical model of the noise.
Claim 7
Dependent Claim
19 words
The method of claim 4 in which the function of gamma ( sigma ''i, ti) can be expressed as
Claim 8
Dependent Claim
30 words
The method of claim 4 in which the measurement is periodically sampled and the steps of automatically comparing, automatically measuring and automatically calculating are carried out during each sample period.
Claim 9
Independent Claim
109 words
The method for automatically determining from a noise corrupted process measurement a quantity indicative of the probability that the measurement represents a controllable process disturbance which comprises the steps of automatically comparing the deviation of the measurement from its desired value to predetermined deviation levels, automatically measuring the duration of time (ti) that said deviation exceeds said predetermined levels, and automatically calculating the probability indicative quantity for said predetermined level as the maximum value for a function of gamma ( sigma ''i, ti), where sigma ''i being the predetermined level, Alpha the standard deviation and Alpha the average time between zero crossings for the statistical model of the noise.
Claim 10
Independent Claim
109 words
The method for automatically determining from a noise corrupted process measurement a quantity indicative of the probability that the measurement represents a controllable process disturbance which comprises the steps of automatically comparing the deviation of the measurement from its desired value to predetermined deviation levels, automatically measuring the duration of time (ti) that said deviation exceeds said predetermined levels, and automatically calculating the probability indicative quantity for said predetermined level as the maximum value for a function of gamma ( sigma ''i, ti), where sigma ''i being the predetermined level, Alpha the standard deviation and Alpha the average time between zero crossings for the statistical model of the noise.
Claim 11
Dependent Claim
19 words
The method of claim 7 in which the function of gamma ( sigma ''i, ti) can be expressed as
Claim 12
Dependent Claim
33 words
The method of claim 7 in which the measurement is obtained from periodically sampled data and the steps of automatically comparing, automatically measuring and automatically calculating are carried out during each sample period.
References Cited (Backward Citations)
US3419772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |