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US3819919A
Expired / Lapsed
US
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Tracking system for time-displaced signals
Assignee: Individual
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Filing: 1972-12-08
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Granted: 1974-06-25
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Expires: 1992-12-08
Abstract
Abstract An automatic tracking correlator is disclosed for measuring the time delay between two input signals by crosscorrelation. Values of one signal are registered until a similar pattern is detected in the other signal. As disclosed, a simple, economical correlation circuit is utilized incorporating analog-digital converters and variable-delay shift registers. An embodiment of the system is disclosed for the measurement of flow or velocity.
Inventors
- 👤 Gunigle R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:43
CPC Classifications
G; G06; G06J; G06J1/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
A tracking system for time-displaced signals comprising: a variable-delay tapped digital means; means for providing a set of digital signals representative of one of said time-displaced signals; means coupling said set of digital signals to said variabledelay tapped digital means to provide delayed digital representations; means for correlating said delayed digital representations with another of said time-displaced signals by combination, and for controlling said variable-delay tapped digital means to attain maximum correlation by incurring a specific time delay; and means responsive to that means for correlating and controlling for manifesting said delay.
Claim 2
Dependent Claim
92 words
A tracking system for time-displaced signals comprising: a variable-delay tapped digital means; means for providing a set of digital signals representative of one of said time-displaced signals; means coupling said set of digital signals to said variabledelay tapped digital means to provide delayed digital representations; means for correlating said delayed digital representations with another of said time-displaced signals by combination, and for controlling said variable-delay tapped digital means to attain maximum correlation by incurring a specific time delay; and means responsive to that means for correlating and controlling for manifesting said delay.
Claim 3
Dependent Claim
37 words
A system according to claim 1 wherein said one signal and said other signal are representative of a fluid stream observed at spaced-apart locations and said means for manifesting comprises means for indicating rates of fluid flow.
Claim 4
Dependent Claim
65 words
A system according to claim 1 wherein said means for correlating includes: means for combining said delayed digital representations with said other of said time-displaced signals to provide a control signal; a variable oscillator means coupled to receive saiD control signal for providing a variable-frequency signal; and means for coupling said variable-frequency signal to said variable-delay tapped digital means for regulating the delay incurred thereby.
Claim 5
Dependent Claim
60 words
A tracking system according to claim 3 further including a first sensor to sense one signal from a fluid stream at one location as one of said time-displaced signals and a second sensor to sense another signal from said fluid stream at another location as said other of said time-displaced signals whereby said means for manifesting indicates rates of flow.
Claim 6
Dependent Claim
15 words
A tracking system according to claim 4 wherein said means for correlating includes digital-to-analog means.
Claim 7
Dependent Claim
36 words
A tracking system according to claim 1 wherein said means for correlating includes means for arithmetically combining said delayed digital representations and said other time-displaced signal to provide a control signal for said variable delay means.
Claim 8
Dependent Claim
25 words
A tracking system according to claim 6 wherein said means for combining includes means for multiplying said delayed digital representations and said other time-displaced signal.
Claim 9
Dependent Claim
17 words
A tracking system according to claim 1 wherein said means for correlating includes a digital-analog converter means.
References Cited (Backward Citations)
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |