US3931607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Array transducer angular tracking system
Assignee: United States Department of the Navy
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Filing: 1972-01-12
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Granted: 1976-01-06
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Expires: 1992-01-12
Abstract
Abstract A system for measuring the angular displacement of a signal source relativeo the center line of an array type transducer. The sum and difference signals of the array are applied to the system which phase shifts the incoming signals, provides a summation of selected phase shifted signals and applies the summed signals to a phase detector. A normalized signal is derived that is an amplitude measurement indicative of the angle between the signal source, and a line incident normal to the array, wherein the sum is a maximum and the difference is zero.
Inventors
- 👤 Richard D. Ingram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:51
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/80; G01S3/802
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
A signal processing system for determining the directional information in a plurality of signals comprising: first and second means for receiving a first and second signal in phase quadrature to each other and phase shifting the first signal 90° with respect to the second signal; third means connected to receive said first means output for phase shifting said first signal -90°; fourth means connected to said second means for phase shifting said second signal -90°; a first adder connected to receive the output signals of said first means and said fourth means for adding the first and fourth means output signals and providing an output signal indicative of the sum; a second adder connected to receive the output signals of said second means and said third means for adding the second and said third means output signals and providing an output signal indicative of the sum; and a phase sensitive detector connected to receive the output signals of said first and second adder for providing an output signal indicative of the directional information within said first and second signals.
Claim 2
Dependent Claim
179 words
A signal processing system for determining the directional information in a plurality of signals comprising: first and second means for receiving a first and second signal in phase quadrature to each other and phase shifting the first signal 90° with respect to the second signal; third means connected to receive said first means output for phase shifting said first signal -90°; fourth means connected to said second means for phase shifting said second signal -90°; a first adder connected to receive the output signals of said first means and said fourth means for adding the first and fourth means output signals and providing an output signal indicative of the sum; a second adder connected to receive the output signals of said second means and said third means for adding the second and said third means output signals and providing an output signal indicative of the sum; and a phase sensitive detector connected to receive the output signals of said first and second adder for providing an output signal indicative of the directional information within said first and second signals.
Claim 3
Dependent Claim
37 words
A signal processing system according to claim 1 further comprising: a first limiter connected intermediate said first adder and said phase sensitive detector; and a second limiter connected intermediate said second adder and said phase sensitive detector.
Claim 4
Dependent Claim
41 words
A signal processing system according to claim 2 further comprising: said first means upon receipt of said first signal phase shifting said first signal +45°; and said second means upon receipt of said second signal phase shifting said second signal -45°.
Claim 5
Dependent Claim
26 words
A signal processing system according to claim 3 further comprising: a post detection filter connected to said phase sensitive detector for eliminating spurious high frequency signals.
Claim 6
Dependent Claim
178 words
An array transducer angular tracking system comprising: an array transducer providing sum and difference signals; first and second means for receiving said sum and difference signals in quadrature to each other and phase shifting said sum signal 90° with respect to said difference signal; third means connected to receive the first means output for phase shifting said sum signal -90°; fourth means connected to the second means output for phase shifting said difference signal -90°; a first adder connected to receive the output signals of said first means and said fourth means for adding the first and fourth means output signals and providing an output signal indicative of the sum; a second adder connected to receive the output signals of said second means and said third means for adding the second and third means output signals and providing an output signal indicative of the sum; and a phase sensitive detector connected to receive the output signals of said first and second adder for providing an output signal indicative of the directional information within said sum and difference signals.
Claim 7
Dependent Claim
178 words
An array transducer angular tracking system comprising: an array transducer providing sum and difference signals; first and second means for receiving said sum and difference signals in quadrature to each other and phase shifting said sum signal 90° with respect to said difference signal; third means connected to receive the first means output for phase shifting said sum signal -90°; fourth means connected to the second means output for phase shifting said difference signal -90°; a first adder connected to receive the output signals of said first means and said fourth means for adding the first and fourth means output signals and providing an output signal indicative of the sum; a second adder connected to receive the output signals of said second means and said third means for adding the second and third means output signals and providing an output signal indicative of the sum; and a phase sensitive detector connected to receive the output signals of said first and second adder for providing an output signal indicative of the directional information within said sum and difference signals.
Claim 8
Dependent Claim
39 words
An array transducer angular tracking system according to claim 5 further comprising: a first limiter connected intermediate said first adder and said phase sensitive detector; and a second limiter connected intermediate said second adder and said phase sensitive detector.
Claim 9
Dependent Claim
43 words
An array transducer angular tracking system according to claim 6 further comprising: said first means upon receipt of said sum signal phase shifting said sum signal +45°; and said second means upon receipt of said difference signal phase shifting said difference signal -45°.
Claim 10
Dependent Claim
27 words
An array transducer angular tracking system according to claim 7 further comprising: a post-detection filter connected to said phase sensitive detector for eliminating spurious high frequency signals.
References Cited (Backward Citations)
US3064253A
Cited
US3286224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |