US3783172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar simulator
Assignee: Singer Co
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Filing: 1971-07-21
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Granted: 1974-01-01
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Expires: 1991-07-21
Abstract
Abstract A device for simulating radar targets comprises a generalpurpose digital computer and a special interface which generates suitable video signals in response to the computer outputs to drive a radar set. In a radar simulator in which several different types of radar targets are simulated, the apparatus of this invention is used to generate the video signals which will display a plurality of mobile targets on the radar set. A limited number of such targets are displayed, and the characteristics of these targets are entered into the computer. Information representing the initial locations of the selected targets and their directions and speeds of movement is inserted into the computer from a remote station, and the computer performs the necessary navigational computations to continually determine the location of the radar set in the gaming area, the bearing of each of the targets from the radar set, and the bearing of the radar antenna at any time. The ranges of all of the targets on a particular bearing are entered by the computer into a register in the order of increasing range from the radar set. When the simulated radar antenna bearing agrees with the target bearing, the stored target ranges are read from the registor and are converted into video signals to drive the radar set.
Inventors
- 👤 F Bernstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:22
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4052; G09; G09B; G09B9/00; G09B9/54; G01S7/4082
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
189 words
In a radar simulator, simulated radar receiver means including radar display means upon which radar targets are displayed, means for generating electrical signals for application to said display means, a shift register, means for supplying to said shift register a plurality of digital words representative of the range and radar reflectivity intensity of a plurality of radar targets which appear along a determined simulated bearing from the simulated radar receiver means, a counter, means for supplying pulses to said counter to be counted at a rate which is directly proportional to the speed of propagation of a radar pulse so that the contents of said counter at any time represents the distance from the simulated receiver of a target, first means for comparing the contents of said counter with the range information stored in said shift register, means connecting said comparing means with said generating means for causing said generating means to generate signals to be displayed when said comparing means obtains a direct comparison, and means responsive to said direct comparison for shifting the contents of said shift register to bring the next target information into operative position.
Claim 2
Dependent Claim
189 words
In a radar simulator, simulated radar receiver means including radar display means upon which radar targets are displayed, means for generating electrical signals for application to said display means, a shift register, means for supplying to said shift register a plurality of digital words representative of the range and radar reflectivity intensity of a plurality of radar targets which appear along a determined simulated bearing from the simulated radar receiver means, a counter, means for supplying pulses to said counter to be counted at a rate which is directly proportional to the speed of propagation of a radar pulse so that the contents of said counter at any time represents the distance from the simulated receiver of a target, first means for comparing the contents of said counter with the range information stored in said shift register, means connecting said comparing means with said generating means for causing said generating means to generate signals to be displayed when said comparing means obtains a direct comparison, and means responsive to said direct comparison for shifting the contents of said shift register to bring the next target information into operative position.
Claim 3
Dependent Claim
15 words
The simulator defined in claim 1 wherein said display means comprises a standard radar set.
Claim 4
Dependent Claim
90 words
The simulator defined in claim 1 further including means for storing information in digital form representative of the range and bearing of radar targets from said simulated receiver, a simulated radar antenna, second means for comparing the simulated bearing of said simulated antenna with the bearing of the stored target information, and means for transfErring information representative of targets from said storage means to said shift register when said second comparing means recognizes a direct comparison between the bearing of said simulated antenna and the bearing of stored target information.
Claim 5
Dependent Claim
72 words
The simulator defined in claim 3 wherein said information stored in said shift register comprises a first part which defines the radar reflectivity of said target and a second part which defines the range from said receiver of said target, means for applying said first part to said signal generating means to control the amplitude of the signals generated thereby, and means for applying said second part to said range comparison means.
Claim 6
Dependent Claim
200 words
A radar simulator comprising a simulated radar receiver including a simulated radar antenna, means for storing digital information defining the range and bearing of a plurality of radar targets, first comparing means for comparing the position of the simulated antenna with the bearing of said targets and for generating an output signal when a direct comparison is made, a shift register, means responsive to the output from said first comparing means for transferring the digital information representing those targets which lie on the bearing of said radar antenna to said shift register, a digital counter, means for producing pulses to be counted by said counter at a rate which is proportional to the transmission rate of radar signals so that said counter contents represents the range of a radar pulse at any instant, radar display means, second comparing means for comparing the range information contained in said shift register with the contents of said counter and for generating a second output signal when a direct comparison is made, and means responsive to the generation of said second output signal for generating electrical signals to drive said radar display to display the targets whose information is stored in said shift register.
Claim 7
Dependent Claim
200 words
A radar simulator comprising a simulated radar receiver including a simulated radar antenna, means for storing digital information defining the range and bearing of a plurality of radar targets, first comparing means for comparing the position of the simulated antenna with the bearing of said targets and for generating an output signal when a direct comparison is made, a shift register, means responsive to the output from said first comparing means for transferring the digital information representing those targets which lie on the bearing of said radar antenna to said shift register, a digital counter, means for producing pulses to be counted by said counter at a rate which is proportional to the transmission rate of radar signals so that said counter contents represents the range of a radar pulse at any instant, radar display means, second comparing means for comparing the range information contained in said shift register with the contents of said counter and for generating a second output signal when a direct comparison is made, and means responsive to the generation of said second output signal for generating electrical signals to drive said radar display to display the targets whose information is stored in said shift register.
Claim 8
Dependent Claim
35 words
The simulator defined in claim 5 further including means responsive to said second output signal for causing the contents of said shift register to shift so as to expose the next target information for comparison.
Claim 9
Dependent Claim
45 words
The simulator defined in claim 6 wherein the digital information stored in said shift register further includes information defining the radar reflectivity intensity of each of said targets, and means for applying said intensity information to said generating means when a second comparison is made.
Claim 10
Dependent Claim
50 words
The simulator defined in claim 7 further including means for feeding back into the input of said shift register information transferred out of the operative position of said register so that the information contained in said register is recirculated, and means for periodically updating the contents of said shift register.
References Cited (Backward Citations)
US3571479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |