US3568141A
Expired / Lapsed
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Acoustic method and apparatus
Assignee: Fried Krupp AG
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Filing: 1968-08-05
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Granted: 1971-03-02
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Expires: 1988-08-05
Abstract
Abstract Method and apparatus for scanning a plurality of channels to determine the azimuth of propagation of, and/or the Doppler shift in, acoustic waves which impinge on a receiver, where each channel carries a signal which is a different function of the azimuth or frequency, respectively, but where three or more of the signals are nonzero for the same value of azimuth or frequency. The method includes the steps of scanning the channels to obtain the nonzero signals in successive order, without interpolating to determine the azimuth or frequency, and then interpolating the azimuth or frequency from the nonzero signals.
Inventors
- 👤 Werner Schwarz
- 👤 Reinhard Wilhelm Leisterer
- 👤 Herwig Meyerhoff
- 👤 Gunter Berkelmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:38
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/687; G; G01; G01R; G01R23/00; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/42; G01S15/50; G01S15/58; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/34; G10K11/341; G10K11/345; Y; Y10; Y10S; Y10S367/00; Y10S367/905
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
186 words
In an apparatus for determining the azimuth x of propagation of acoustic waves by scanning n (n 3) information channels carrying signals which are a function of x, three or more of which signals are nonzero for the same valve of x, and evaluating the azimuth x by interpolating between said three or more signals, the improvement comprising, in combination: a. means for scanning said n channels to produce successive signals representative, respectively, of the value of said three or more signals; and b. means, connected to said scanning means, for interpolating said azimuth x from the signals produced by said scanning means, said interpolating means including: 1. pulse filter means, connected to said scanning means, for multiplying each of said successive signals produced by said scanning means by the pulse response of said filter means; 2. means, connected to said pulse filter means, for determining the time at which the signal formed by said pulse filter means is at a maximum; and 3. means, connected to said determining means, for indicating the value of time produced by said determining means as the value of x.
Claim 2
Dependent Claim
186 words
In an apparatus for determining the azimuth x of propagation of acoustic waves by scanning n (n 3) information channels carrying signals which are a function of x, three or more of which signals are nonzero for the same valve of x, and evaluating the azimuth x by interpolating between said three or more signals, the improvement comprising, in combination: a. means for scanning said n channels to produce successive signals representative, respectively, of the value of said three or more signals; and b. means, connected to said scanning means, for interpolating said azimuth x from the signals produced by said scanning means, said interpolating means including: 1. pulse filter means, connected to said scanning means, for multiplying each of said successive signals produced by said scanning means by the pulse response of said filter means; 2. means, connected to said pulse filter means, for determining the time at which the signal formed by said pulse filter means is at a maximum; and 3. means, connected to said determining means, for indicating the value of time produced by said determining means as the value of x.
Claim 3
Dependent Claim
26 words
means, connected to said pulse filter means, for determining the time at which the signal formed by said pulse filter means is at a maximum; and
Claim 4
Dependent Claim
26 words
means, connected to said pulse filter means, for determining the time at which the signal formed by said pulse filter means is at a maximum; and
Claim 5
Dependent Claim
95 words
In a method of determining the Doppler shift in acoustic waves by successively scanning n (n 3) information channels carrying signals which are a function of the frequency of said acoustic waves, three or more of which signals are nonzero for the same frequency value, and evaluating the frequency, and, thus, the Doppler shift, by interpolating between said three or more signals, the improvement comprising the steps of: a. successively scanning said three or more signals without interpolating; and b. interpolating said frequency from the signals produced by scanning said three or more signals by:
Claim 6
Dependent Claim
95 words
In a method of determining the Doppler shift in acoustic waves by successively scanning n (n 3) information channels carrying signals which are a function of the frequency of said acoustic waves, three or more of which signals are nonzero for the same frequency value, and evaluating the frequency, and, thus, the Doppler shift, by interpolating between said three or more signals, the improvement comprising the steps of: a. successively scanning said three or more signals without interpolating; and b. interpolating said frequency from the signals produced by scanning said three or more signals by:
Claim 7
Dependent Claim
18 words
determining the time at which the signal formed as the product of said multiplication is at a maximum.
Claim 8
Dependent Claim
18 words
determining the time at which the signal formed as the product of said multiplication is at a maximum.
Claim 9
Dependent Claim
51 words
shift register means, having an input connected to receive said pulse train from said pulse generator means and having a plurality of outputs connected to said switch means and said function generator means, for supplying information channel scanning pulses to said switch means and synchronizing pulses to said function generator means.
Claim 10
Dependent Claim
51 words
shift register means, having an input connected to receive said pulse train from said pulse generator means and having a plurality of outputs connected to said switch means and said function generator means, for supplying information channel scanning pulses to said switch means and synchronizing pulses to said function generator means.
Claim 11
Dependent Claim
34 words
means, connected to the output of said electronic switch means, for multiplying each of said signals produced by said scanning means by a respective function of time signal produced by said function generator means;
Claim 12
Dependent Claim
34 words
means, connected to the output of said electronic switch means, for multiplying each of said signals produced by said scanning means by a respective function of time signal produced by said function generator means;
Claim 13
Dependent Claim
18 words
means, connected to said multiplying means, for adding together the signals formed as products by said multiplying means;
Claim 14
Dependent Claim
18 words
means, connected to said multiplying means, for adding together the signals formed as products by said multiplying means;
Claim 15
Dependent Claim
156 words
Apparatus for measuring the Doppler shift in acoustic waves comprising in combination: a. transducer means for receiving said acoustic waves and producing a signal having a frequency which is dependent upon the frequency of said acoustic waves; b. a plurality of band-pass filters connected to receive said signal, each of said band-pass filters being tuned to a different frequency; c. switching network means for successively scanning the outputs of said plurality of filters; d. pulse filter means, connected to said switching network means, for multiplying each of the successive signals produced by said scanning means by the pulse response of said filter means; e. means, connected to said pulse filter means, for determining the time at which the signal formed by said pulse filter means is at a maximum; and f. means, connected to said determining means, for indicating the value of time produced by said determining means as the Doppler shift in said acoustic waves.
Claim 16
Dependent Claim
156 words
Apparatus for measuring the Doppler shift in acoustic waves comprising in combination: a. transducer means for receiving said acoustic waves and producing a signal having a frequency which is dependent upon the frequency of said acoustic waves; b. a plurality of band-pass filters connected to receive said signal, each of said band-pass filters being tuned to a different frequency; c. switching network means for successively scanning the outputs of said plurality of filters; d. pulse filter means, connected to said switching network means, for multiplying each of the successive signals produced by said scanning means by the pulse response of said filter means; e. means, connected to said pulse filter means, for determining the time at which the signal formed by said pulse filter means is at a maximum; and f. means, connected to said determining means, for indicating the value of time produced by said determining means as the Doppler shift in said acoustic waves.
Claim 17
Dependent Claim
22 words
means, connected to said determining means, for indicating the value of time produced by said determining means as the value of x.
Claim 18
Dependent Claim
22 words
means, connected to said determining means, for indicating the value of time produced by said determining means as the value of x.
Claim 19
Dependent Claim
29 words
means, connected to said adding means, for determining the value of time at which the signal formed as the sum by said adding means is at a maximum; and
Claim 20
Dependent Claim
29 words
means, connected to said adding means, for determining the value of time at which the signal formed as the sum by said adding means is at a maximum; and
Claim 21
Dependent Claim
120 words
In an apparatus for determining the azimuth x of propagation of acoustic waves by scanning n (n 3) information channels carrying signals which are a function of x, three or more of which signals are nonzero for the same value of x, and evaluating the azimuth x by interpolating between said three or more signals, the improvement comprising, in combination: a. means for scanning said n channels to produce successive signals representative, respectively, of the value of said three or more signals, said scanning means including electronic switch means operative only to transmit said successive signals; b. means, connected to said scanning means, for interpolating said azimuth x from the signals transmitted by said scanning means, said interpolating meanS including:
Claim 22
Dependent Claim
120 words
In an apparatus for determining the azimuth x of propagation of acoustic waves by scanning n (n 3) information channels carrying signals which are a function of x, three or more of which signals are nonzero for the same value of x, and evaluating the azimuth x by interpolating between said three or more signals, the improvement comprising, in combination: a. means for scanning said n channels to produce successive signals representative, respectively, of the value of said three or more signals, said scanning means including electronic switch means operative only to transmit said successive signals; b. means, connected to said scanning means, for interpolating said azimuth x from the signals transmitted by said scanning means, said interpolating meanS including:
Claim 23
Dependent Claim
31 words
means, connected to said determining means, for indicating said value of time as the value of x; and c. means for controlling said switch means and said function generator means including:
Claim 24
Dependent Claim
31 words
means, connected to said determining means, for indicating said value of time as the value of x; and c. means for controlling said switch means and said function generator means including:
Claim 25
Dependent Claim
123 words
The improvement defined in claim 4, wherein said multiplier means includes a plurality of multiplier circuits, each having two inputs and one output, one of said two inputs being connected to receive one of said successive signals from said switch means and the other of said two inputs being connected to receive one of said conformal functions from said function generator means; wherein said adding means includes an adding circuit having a plurality of inputs, each of which is connected to one of said outputs of said plurality of multiplier circuits, and an output; and wherein said determining means includes a maximum gate circuit having an input connected to the output of said adding circuit and an output connected to said indicating means.
Claim 26
Dependent Claim
34 words
The improvement defined in claim 5, further comprising directional receiver means, connected to said n channels, for receiving acoustic waves and supplying said signals which are a function of x to said n channels.
Claim 27
Dependent Claim
22 words
The improvement defined in claim 6, wherein said directional receiver means includes n directional receivers arranged at the circumference of a circle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |