US3886333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of evaluating the precision of cross-spectral density measurements of random noise
Assignee: United States Department of Energy
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Filing: 1973-12-21
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Granted: 1975-05-27
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Expires: 1993-12-21
Abstract
Abstract This invention relates to a method of measuring parameters of a nuclear reactor by noise measurements. Noise signals are developed by the detectors placed in the reactor core. The polarity coincidence between the noise signals is used to develop quantities from which various parameters of the reactor can be calculated.
Inventors
- 👤 Charles E Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:27
CPC Classifications
G; G21; G21C; G21C17/00; G21C17/10; G06; G06J; G06J1/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
The method of measuring the coherence of first and second noise signals including the steps of: a. filtering each of said first and second noise signals in first and second band-pass filters respectively, the band of frequencies passed by each of said band-pass filters being the same and further being within the band of frequencies of interest and having a bandwidth narrow enough to give sufficient resolution so that variations in the cross power spectral density function are not smeared and wide enough to give adequate precision; b. multiplying said filtered first and second noise signals in an analog multiplier to develop a first product signal with said first and second noise signals having the same polarity and a second product signal with said first and second noise signals having opposite polarities; c. converting said first and second product signals to first and second pulse trains respectively; d. integrating said first pulse train over a predetermined time period T to develop the parameter A; e. integrating said second pulse train over said time period T to develop the parameter B; and f. calculating the coherence gamma according to the formula
Claim 2
Independent Claim
190 words
The method of measuring the coherence of first and second noise signals including the steps of: a. filtering each of said first and second noise signals in first and second band-pass filters respectively, the band of frequencies passed by each of said band-pass filters being the same and further being within the band of frequencies of interest and having a bandwidth narrow enough to give sufficient resolution so that variations in the cross power spectral density function are not smeared and wide enough to give adequate precision; b. multiplying said filtered first and second noise signals in an analog multiplier to develop a first product signal with said first and second noise signals having the same polarity and a second product signal with said first and second noise signals having opposite polarities; c. converting said first and second product signals to first and second pulse trains respectively; d. integrating said first pulse train over a predetermined time period T to develop the parameter A; e. integrating said second pulse train over said time period T to develop the parameter B; and f. calculating the coherence gamma according to the formula
References Cited (Backward Citations)
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US3479495A
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |