MOSAIC OMNIDIRECTIONAL RADAR SCANNING SYSTEM
First Claim
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1. A mosaic omnidirectional radar scanning system for surveillance aircraft comprising:
- a pair of sending and receiving radar antennae substantially covering in total a 360* solid angle of transmission and reception, synchronized motor means for driving said plurality of antennae in unison;
a spherically shaped display element including a transparent sphere having a fluorophor-coated inner surface, a pair of oppositely directed electron-beam guns mounted within said sphere, said guns covering substantially a 360* solid angle of projection, and operating in synchronism with said antennae;
raDar pulse generating means, a pair of radar transmitters connected respectively to each of said sending radar antennae, a pair of radar receiver means, a pair of spot-generator means actuated by the presence of a received signal from a respective radar receiver means, means for directing a received signal to one of said electron guns for display upon the inner surface of said sphere, and saw-tooth wave generator means for biasing said spot-generator means such that the size of a display signal is related to the distance from a detected object.
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Abstract
A radar-type environmental warning device in which displays corresponding to objects located in the vicinity of the aircraft are presented on a spherically shaped or planar display. Means is provided for distinguishing objects which are approaching the surveillance aircraft from those which are receding therefrom, and for indicating relative distance between a sensed object and the aircraft in terms of size and shape of individually displayed received signals.
35 Citations
5 Claims
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1. A mosaic omnidirectional radar scanning system for surveillance aircraft comprising:
- a pair of sending and receiving radar antennae substantially covering in total a 360* solid angle of transmission and reception, synchronized motor means for driving said plurality of antennae in unison;
a spherically shaped display element including a transparent sphere having a fluorophor-coated inner surface, a pair of oppositely directed electron-beam guns mounted within said sphere, said guns covering substantially a 360* solid angle of projection, and operating in synchronism with said antennae;
raDar pulse generating means, a pair of radar transmitters connected respectively to each of said sending radar antennae, a pair of radar receiver means, a pair of spot-generator means actuated by the presence of a received signal from a respective radar receiver means, means for directing a received signal to one of said electron guns for display upon the inner surface of said sphere, and saw-tooth wave generator means for biasing said spot-generator means such that the size of a display signal is related to the distance from a detected object.
- a pair of sending and receiving radar antennae substantially covering in total a 360* solid angle of transmission and reception, synchronized motor means for driving said plurality of antennae in unison;
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2. Structure in accordance with claim 1, including means for distinguishing between approaching detected objects and receding detected objects, and altering the character of a displayed signal with reference thereto.
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3. Structure in accordance with claim 2, including means for detecting the presence of an approaching aircraft by measuring the Doppler shift of a received radar signal, and causing one of said guns to operate in the presence of said such signal.
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4. In a radar-type environmental warning device for aircraft including oscilloscope means for displaying signals corresponding to detected aircraft, improve means for distinguishing whether the detected aircraft is approaching or receding, including means for detecting a Doppler shift in signal frequency between successive received signals corresponding to the same object, and means for altering the observed appearance of a continuously displayed trace corresponding to said signals in accordance with such detection;
- said Doppler shift detecting means including a rotating drum having a pair of magnetized bands on an outer surface thereof, each of said bands having an associated recording head, pickup head and erasing head means for directing successive received pulses to be recorded on one of said bands in alternate fashion.
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5. A mosaic omnidirectional radar scanning system for aircraft comprising:
- a pair of sending and receiving radar antennae substantially covering in total a 360* solid angle of transmission and reception, synchronized motor means for driving said plurality of antenna in unison, a display element including a spherical cathode-ray tube having a fluorophor coated inner surface forming a generally planar display area, a pair of oppositely directed electron-beam guns mounted within said cathode-ray tube, the beams emanating from said guns to each substantially cover the entire area of said display, and in synchronism with said antennae;
radar-pulsed generating means, a pair of radar transmitters connected respectively to each of said sending radar antennae, a pair of radar receiver means, a pair of spot-generator means actuated by the presence of a received signal from a respective radar receiver means, and means for directing a received signal to one of said electron guns for display upon said display area;
said coated inner surface having a fluorophor responsive in terms of color with respect to electron-beam voltage, and means for varying the voltage of an electron beam depending upon the angle of incidence of a received signal with respect to the line of flight of the surveillance aircraft.
- a pair of sending and receiving radar antennae substantially covering in total a 360* solid angle of transmission and reception, synchronized motor means for driving said plurality of antenna in unison, a display element including a spherical cathode-ray tube having a fluorophor coated inner surface forming a generally planar display area, a pair of oppositely directed electron-beam guns mounted within said cathode-ray tube, the beams emanating from said guns to each substantially cover the entire area of said display, and in synchronism with said antennae;
Specification