US3701089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display for multi-channel sonars
Assignee: United States Department of the Navy
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Filing: 1970-10-20
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Granted: 1972-10-24
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Expires: 1990-10-20
Abstract
Abstract This invention discloses an improved visual display arrangement incorporated in and uniquely combined with a multi-channel sonar system. The arrangement is characterized as having a low persistance cathode ray tube with low direct current potential on the grid thereof. Improved sweep drive using electromagnetic deflection and an improved magnetic focusing arrangement contribute to the operation thereof. A direct coupled video amplifier and a regulated high voltage power supply complete the novel display arrangement.
Inventors
- 👤 John G Cowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:09
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/2806; G01S7/52; G01S7/56; G01S7/62; G01S7/6218
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
319 words
A sonar system comprising in combination: transmitter means for ensonifying a predetermined volume of water with acoustic energy; receiver means for converting acoustic energy reflected from objects within said predetermined volume of water into a plurality of electrical echo signals corresponding to a plurality of reception channels angularly oriented with respect to one another; scanning means connected in circuit with said receiver means for periodically scanning said plurality of electricaL signals at a first scanning rate to develop a time varying signal output therefrom; memory and synchronizing circuit means connected to said scanning means for storage of said output therefrom, and for producing video output signals from said stored signals corresponding thereto but at a second scanning rate different from said first scanning rate; direct coupled video amplifier means connected to said memory and synchronizing circuit means for receipt of said video signals therefrom for amplifying said video signals, including those of very low frequency, to a predetermined level; cathode ray tube means having a low persistency phosphor face and electron beam generating means directly connected to said direct coupled video amplifier means, so as to receive said amplified video signals for display thereof as visual light patterns on said phosphor face thereof; deflection coil means mounted in cooperating relation to said cathode ray tube means for deflection of the electron beam thereof; sweep circuit means connected between said deflection coil means and said memory and synchronizing circuit means for supplying a deflection current to the former in response to signals supplied by the latter; focus coil means mounted in cooperating relationship to said cathode ray tube means for converging said electron beam therein to a discrete spot on the phosphor face thereof; focus circuit means connected to said focus coil means for supplying a regulated current thereto; and regulated high voltage power supply means connected to said cathode ray tube for generating and regulating electrical operational potentials therefor.
Claim 2
Dependent Claim
319 words
A sonar system comprising in combination: transmitter means for ensonifying a predetermined volume of water with acoustic energy; receiver means for converting acoustic energy reflected from objects within said predetermined volume of water into a plurality of electrical echo signals corresponding to a plurality of reception channels angularly oriented with respect to one another; scanning means connected in circuit with said receiver means for periodically scanning said plurality of electricaL signals at a first scanning rate to develop a time varying signal output therefrom; memory and synchronizing circuit means connected to said scanning means for storage of said output therefrom, and for producing video output signals from said stored signals corresponding thereto but at a second scanning rate different from said first scanning rate; direct coupled video amplifier means connected to said memory and synchronizing circuit means for receipt of said video signals therefrom for amplifying said video signals, including those of very low frequency, to a predetermined level; cathode ray tube means having a low persistency phosphor face and electron beam generating means directly connected to said direct coupled video amplifier means, so as to receive said amplified video signals for display thereof as visual light patterns on said phosphor face thereof; deflection coil means mounted in cooperating relation to said cathode ray tube means for deflection of the electron beam thereof; sweep circuit means connected between said deflection coil means and said memory and synchronizing circuit means for supplying a deflection current to the former in response to signals supplied by the latter; focus coil means mounted in cooperating relationship to said cathode ray tube means for converging said electron beam therein to a discrete spot on the phosphor face thereof; focus circuit means connected to said focus coil means for supplying a regulated current thereto; and regulated high voltage power supply means connected to said cathode ray tube for generating and regulating electrical operational potentials therefor.
Claim 3
Dependent Claim
122 words
A sonar system according to claim 1 wherein said direct coupled video amplifier means comprises: first solid state amplifier means connected to receive said video signals for increasing the magnitude thereof; first adjustable means connected in circuit with said first solid state amplification means for balancing the output thereof to zero in the absence of an input signal thereto; second solid state amplifier means for further increasing the magnitude of said video signals; adjustable resistor means connected between said first and second solid state amplifier means for controlling the amount of signal coupled therebetween; and adjustable capacitor means connected in circuit with said second solid state amplifier means for adjusting the high frequency response thereof to avoid overshoot in square wave response.
Claim 4
Dependent Claim
68 words
A sonar system according to claim 2 in which said video amplifier further comprises: third solid state amplifier means connected to said second solid state amplifier means for further increasing the magnitude of the video signals applied thereto; and solid state blanking means connected between said second and third solid state amplifier means for selectively interrupting the video signal transmitted therebetween in response to electrical signal applied thereto.
Claim 5
Dependent Claim
50 words
A sonar system according to claim 1 further comprising sense resistance means connected to said deflection coil means and said sweep circuit means for developing an electrical sense signal indicative of the current flowing in said deflection coil means and for applying said sense signal to said sweep circuit means.
Claim 6
Dependent Claim
53 words
A sonar system according to claim 4 in which the aforesaid sweep circuit means includes a differential amplifier having one input connected to said sense resistance means and another input connected to the aforesaid memory and synchronizing circuit, so as to receive sweep signals therefrom for linearly amplifying said sweep signals fed thereto.
Claim 7
Dependent Claim
78 words
A sonar system according to claim 1 wherein said regulated high voltage power supply means comprises: oscillator means for producing an alternating current output signal; voltage amplifier means connected to the output of said oscillator means for increasing the magnitude of said alternating current output signal to a predetermined levEl; and voltage doubler rectifier means connected to the output of said voltage amplifier means for changing said amplified alternating current output to a high voltage direct current output.
Claim 8
Dependent Claim
72 words
A sonar system according to claim 6 wherein said regulated high voltage power supply further comprises: voltage divider means connected across the high voltage direct current output for obtaining a sense voltage therefrom; variable impedance means connected to said voltage divider means so as to receive said sense voltage therefrom, and connected to said voltage amplifier means so as to regulate the gain thereof in response to variations in said sense voltage.
Claim 9
Dependent Claim
283 words
In a sonar system, including transmitter means for insonifying a predetermined volume of water with acoustic energy; receiver means for converting acoustic energy reflected from objects within said predetermined volume of water into a plurality of electrical echo signals corresponding to a plurality of reception channels angularly oriented with respect to one another; scanning means connected in circuit with said receiver means for periodically scanning said plurality of electrical signals at a first scanning rate to develop a time varying signal output therefrom; memory and synchronizing circuit means connected to said scanning means for storage of said output therefrom and for producing video output signals from said stored signal corresponding thereto but at a second scanning rate different from said first scanning rate; the improvement comprising: cathode ray tube display means having electron beam forming capabilities cooperating with a high dynamic range and a low persistence phosphor display surface for display of wide dynamic range video signals; electromagnetic deflection means in cooperating relationship to said cathode ray tube display means for scanning movement of the electron beam thereof, so as to produce a roster on said display surface; direct coupled video amplifier means suitably mounted on modular, removable support means and electrically connected to said cathode ray tube display means for supplying of amplified video signals thereto; regulated high voltage supply means electrically connected to said cathode ray tube for supplying operating potentials thereto; and focusing means comprising focus coil means in cooperating relation to said cathode ray tube display means and regulated focus power supply means electrically connected to said coil means and cooperating therewith for focusing the electron beam of said cathode ray tube display means on the display surface thereof.
Claim 10
Dependent Claim
283 words
In a sonar system, including transmitter means for insonifying a predetermined volume of water with acoustic energy; receiver means for converting acoustic energy reflected from objects within said predetermined volume of water into a plurality of electrical echo signals corresponding to a plurality of reception channels angularly oriented with respect to one another; scanning means connected in circuit with said receiver means for periodically scanning said plurality of electrical signals at a first scanning rate to develop a time varying signal output therefrom; memory and synchronizing circuit means connected to said scanning means for storage of said output therefrom and for producing video output signals from said stored signal corresponding thereto but at a second scanning rate different from said first scanning rate; the improvement comprising: cathode ray tube display means having electron beam forming capabilities cooperating with a high dynamic range and a low persistence phosphor display surface for display of wide dynamic range video signals; electromagnetic deflection means in cooperating relationship to said cathode ray tube display means for scanning movement of the electron beam thereof, so as to produce a roster on said display surface; direct coupled video amplifier means suitably mounted on modular, removable support means and electrically connected to said cathode ray tube display means for supplying of amplified video signals thereto; regulated high voltage supply means electrically connected to said cathode ray tube for supplying operating potentials thereto; and focusing means comprising focus coil means in cooperating relation to said cathode ray tube display means and regulated focus power supply means electrically connected to said coil means and cooperating therewith for focusing the electron beam of said cathode ray tube display means on the display surface thereof.
Claim 11
Dependent Claim
41 words
The multi-channel sonar of claim 8 further comprising: magnetic sweep generator means electrically connected to said electromagnetic deflection means so as to supply current signals thereto and to receive sense signals therefrom for producing predetermined beam deflections of said electron beam.
Claim 12
Dependent Claim
39 words
The multi-channel sonar of claim 9 wherein said magnetic sweep generator means comprises differential amplifier means having the inverting input thereof connected to receive said sense signals for increasing the linearity of the output of said sweep generator means.
References Cited (Backward Citations)
US3001190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |