US3750152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse-echo phase discriminator using deltic processing
Assignee: General Electric Co
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Filing: 1972-04-17
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Granted: 1973-07-31
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Expires: 1992-04-17
Abstract
Abstract This disclosure is of a pulse-echo signal processor for deriving and displaying bearing angle information by measurement of the phase difference of echo signals received at two spaced points. Bearing angle determination is accomplished by processing signals received at each of the two spaced points through a moving time series DELTIC and correlating the time-compressed outputs with the transmitted signal which is correspondingly time-compressed in a stationary time series DELTIC. The correlation signals thus generated are combined to provide an unthresholded display output, in which the input signal amplitude information is preserved, and a thresholded output to a timer which indicates the desired phase difference measurement.
Inventors
- 👤 L Waful
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:15
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/42; G01S1/00; G01S1/72; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28; G01S13/284; G01S13/288; G01S15/08; G01S15/10; G01S15/102; G01S15/104; G01S3/00; G01S3/80; G01S3/802; G01S3/808; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
319 words
A pulse-echo signal processor for determining the phase difference of two received signals which include reflections of a transmitted signal, comprising: a. means for sampling said two received signals at a common sampling rate and digitalizing each of the samples to provide first and second digital saMple signals respectively describing one of said received signals both as to polarity and amplitude; b. first and second moving time series (MTS) time compression means each including a recirculation loop and means for loading into said loop at said sampling rate the polarity and amplitude information describing one of said first and second digital sample signals, for recirculation therein as a time compressed MTS signal; c. stationary time series (STS) time compression means including a recirculation loop and means for digitalizing polarity information from said transmitted signal and loading the polarity information at said sampling rate as a time compressed STS signal in said loop for recirculation therein, said STS time compression means having a recirculation time differing from that of said MTS means to thereby provide precession of the MTS signals with respect to the STS signal; d. first and second correlation means each operative to compare the STS signal for polarity coincidence with one of said first and second MTS signals and operative to output a correlation signal which preserves both polarity and amplitude information describing each MTS signal for which polarity coincidence with the STS is found; e. time measuring means responsive to the correlation signal outputted by said first correlation means to initiate a time measurement and responsive to the correlation signal outputted by said second correlation means to conclude said measurement and indicate the phase difference determination thus made; and f. thresholding circuit means responsive to the amplitude of at least one of said correlation signals to enable phase difference determinations only with respect to received signals for which said one correlation signal exceeds a threshold level.
Claim 2
Dependent Claim
319 words
A pulse-echo signal processor for determining the phase difference of two received signals which include reflections of a transmitted signal, comprising: a. means for sampling said two received signals at a common sampling rate and digitalizing each of the samples to provide first and second digital saMple signals respectively describing one of said received signals both as to polarity and amplitude; b. first and second moving time series (MTS) time compression means each including a recirculation loop and means for loading into said loop at said sampling rate the polarity and amplitude information describing one of said first and second digital sample signals, for recirculation therein as a time compressed MTS signal; c. stationary time series (STS) time compression means including a recirculation loop and means for digitalizing polarity information from said transmitted signal and loading the polarity information at said sampling rate as a time compressed STS signal in said loop for recirculation therein, said STS time compression means having a recirculation time differing from that of said MTS means to thereby provide precession of the MTS signals with respect to the STS signal; d. first and second correlation means each operative to compare the STS signal for polarity coincidence with one of said first and second MTS signals and operative to output a correlation signal which preserves both polarity and amplitude information describing each MTS signal for which polarity coincidence with the STS is found; e. time measuring means responsive to the correlation signal outputted by said first correlation means to initiate a time measurement and responsive to the correlation signal outputted by said second correlation means to conclude said measurement and indicate the phase difference determination thus made; and f. thresholding circuit means responsive to the amplitude of at least one of said correlation signals to enable phase difference determinations only with respect to received signals for which said one correlation signal exceeds a threshold level.
Claim 3
Dependent Claim
33 words
A signal processor as defined in claim 1 further including means for rectifying, integrating and summing said correlation signals, and wherein said thresholding circuit means is responsive to the correlation signals thus summed.
Claim 4
Dependent Claim
41 words
A signal processor as defined in claim 1 further including delay means interposed between said second correlation means and said time measuring means to thus provide a positive time measure irrespective of the direction of phase differences of said received signals.
Claim 5
Dependent Claim
27 words
A signal processor as defined in claim 1 further including digital-to-analog conversion and limiter means interposed between each of said correlation means and said time measuring means.
Claim 6
Dependent Claim
23 words
A signal processor as defined in claim 1 further including means for peak detecting, integrating and summing said correlation signals for visual display.
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |