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US3790925A
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Echo-sounding apparatus having a digital intermediate store
Assignee: ELAC Electroacustic GmbH
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Filing: 1970-06-19
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Granted: 1974-02-05
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Expires: 1990-06-19
Abstract
Abstract This invention relates to echo-sounding apparatus of the kind employing at least one digital intermediate store and an indicating apparatus, and in which echo signals that arise within a sounding period and which form echo information, are read into the intermediate store and are subsequently interrogated or read out of this store and then fed to the indicating apparatus. In order to remove the defects attendant upon hitherto usual digital intermediate stores, the invention provides at least one timing pulse generator which is associated with the intermediate store and is operable at a selected frequency or, alternatively, at least two timing pulse generators are provided that operate at different pulse frequencies: in either case the intermediate store is operated on read-in of the echo information at a frequency which is different from the read-out frequency. As a result, it is possible to adjust the read-out speed independently of the read-in speed. In this way, either the whole of the echo information can be read-out slower or quicker than the speed of read-in or, alternatively, a portion of the echo information can be read-out slower or quicker than the remaining part of the echo information.
Inventors
- 👤 E Ahrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:41
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/56; G01S7/62
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
204 words
In echo-sounding apparatus having at least one digital intermediate store and an indicating apparatus, echo signals appearing within one echo sounding period, which form the echo information, being read into the intermediate store and subsequently read out of the store and fed to the indicating apparatus, at least one timing pulse generator operable at a selectable frequency operatively coordinated with said intermediate store, means for operating said intermediate store on storage of the echo information, at a pulse frequency different from the read-out pulse frequency wherein on read-out of the echo information a higher pulse frequency is used than on read-in, and wherein the store is read-out repeatedly, said indicating apparatus comprising a two-beam cathode ray tube, the first beam of which is influenceable by the echo information appearing in real time and the second beam of which is influenceable by the echo information of the preceding sounding period read-out repeatedly from the store at a higher pulse frequency than that used at read-in, and wherein means are provided for deflection of the two electron beams of said cathode ray tube at speeds along the time axis that have the same relationship to one another as the read-in and read-out frequencies of said store.
Claim 2
Dependent Claim
204 words
In echo-sounding apparatus having at least one digital intermediate store and an indicating apparatus, echo signals appearing within one echo sounding period, which form the echo information, being read into the intermediate store and subsequently read out of the store and fed to the indicating apparatus, at least one timing pulse generator operable at a selectable frequency operatively coordinated with said intermediate store, means for operating said intermediate store on storage of the echo information, at a pulse frequency different from the read-out pulse frequency wherein on read-out of the echo information a higher pulse frequency is used than on read-in, and wherein the store is read-out repeatedly, said indicating apparatus comprising a two-beam cathode ray tube, the first beam of which is influenceable by the echo information appearing in real time and the second beam of which is influenceable by the echo information of the preceding sounding period read-out repeatedly from the store at a higher pulse frequency than that used at read-in, and wherein means are provided for deflection of the two electron beams of said cathode ray tube at speeds along the time axis that have the same relationship to one another as the read-in and read-out frequencies of said store.
Claim 3
Dependent Claim
126 words
In echo-sounding apparatus having at least one digital intermediate store and an indicating apparatus, echo signals appearing within one echo sounding period, which form tHe echo information, being read into the intermediate store and subsequently read out of the store and fed to the indicating apparatus, at least one timing pulse generator operable at a selectable frequency operatively coordinated with said intermediate store, means for operating said intermediate store on storage of the echo information, at a pulse frequency different from the read-out pulse frequency, said store comprising at least one shift register whose output is open on read-in and connected to its input on read-out, and wherein at least one of said timing pulse generators is connected to a timing input of said shift register.
Claim 4
Dependent Claim
126 words
In echo-sounding apparatus having at least one digital intermediate store and an indicating apparatus, echo signals appearing within one echo sounding period, which form tHe echo information, being read into the intermediate store and subsequently read out of the store and fed to the indicating apparatus, at least one timing pulse generator operable at a selectable frequency operatively coordinated with said intermediate store, means for operating said intermediate store on storage of the echo information, at a pulse frequency different from the read-out pulse frequency, said store comprising at least one shift register whose output is open on read-in and connected to its input on read-out, and wherein at least one of said timing pulse generators is connected to a timing input of said shift register.
Claim 5
Dependent Claim
187 words
Echo-sounding apparatus according to claim 2, wherein: a. said store consists of two shift registers of which at any time, one is effecting read-in and the other is effecting read-out; b. a synchronous counter having the same bit number as said shift registers is associated with said shift registers; c. means are provided to switch said synchronous counter, in common with said shift registers from read-in to read-out and vice versa; d. a cathode ray tube serving as said indicating apparatus; e. the zero position input of said synchronous counter is connectable to a timing pulse generator and its output is connectable to a saw-tooth voltage generator constituting the time base of said cathode ray tube; f. said timing pulse generator is connectable in common to an input of said synchronous counters and said associated shift registers whereby, simultaneously with the switching over of one of said shift registers, a zero position pulse is fed into said associated synchronous counter; and g. the counting pulse is operative to trigger said saw-tooth voltage generator at each commencement of read-out of the echo information contained in said shift register.
Claim 6
Dependent Claim
46 words
Echo-sounding apparatus according to claim 3 wherein said synchronous counter includes two shift registers, which are restored to zero and carry the circulating counting pulse for triggering the sawtooth voltage generator alternately according to the switching over of the stores from one condition to the other.
Claim 7
Dependent Claim
113 words
In echo-sounding apparatus having at least one digital intermediate store and an indicating apparatus, echo signals appearing within one echo sounding period, which form the echo information, being read into the intermediate store and subsequently read out of the store and fed to the indicating apparatus, at least one timing pulse generator operable at a selectable frequency operatively coordinated with said intermediate store, means for operating said intermediate store on storage of the echo information, at a pulse frequency different from the read-out pulse frequency, said store comprising at least one shift register, and wherein at least one of said timing pulse generator is connected to a timing input of said shift register.
Claim 8
Dependent Claim
113 words
In echo-sounding apparatus having at least one digital intermediate store and an indicating apparatus, echo signals appearing within one echo sounding period, which form the echo information, being read into the intermediate store and subsequently read out of the store and fed to the indicating apparatus, at least one timing pulse generator operable at a selectable frequency operatively coordinated with said intermediate store, means for operating said intermediate store on storage of the echo information, at a pulse frequency different from the read-out pulse frequency, said store comprising at least one shift register, and wherein at least one of said timing pulse generator is connected to a timing input of said shift register.
Claim 9
Dependent Claim
17 words
Echo-sounding apparatus according to claim 5 wherein the output of said shift register is open on read-in.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |