System for the detection of incoming munitions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01S-013/48
G01S-013/00
G01S-013/52
출원번호
US-0638651
(2011-03-30)
등록번호
US-9097793
(2015-08-04)
우선권정보
GB-1005675.2 (2010-03-31)
국제출원번호
PCT/GB2011/000476
(2011-03-30)
§371/§102 date
20121001
(20121001)
국제공개번호
WO2011/121286
(2011-10-06)
발명자
/ 주소
Harman, Stephen A
Hume, Andrew L
출원인 / 주소
QINETIQ LIMITED
대리인 / 주소
Nixon & Vanderhye P.C.
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
A system for detecting munitions in flight comprises a radar transmitter, receiver, and associated antennas, wherein the antennas are oriented to include ground level coverage, and where a receive antenna is arranged to provide a plurality of receive beams. The system further incorporates a Doppler
A system for detecting munitions in flight comprises a radar transmitter, receiver, and associated antennas, wherein the antennas are oriented to include ground level coverage, and where a receive antenna is arranged to provide a plurality of receive beams. The system further incorporates a Doppler filter arranged to reject targets that have velocity profiles that do not match those expected of targets of interest. If a target of interest is detected then an indication is provided, preferably in the form of an audible alert, allowing those nearby time to take cover. The system provides a simple munitions detection capability that may operate in CW mode to allow rapid detection, and may also have means such as switchable FMCW, and elevation measurement to allow estimation of possible landing areas of the target.
대표청구항▼
1. A system for the detection of munitions, the system comprising a radar, processing means and an indicator wherein the radar has a transmitter, a receiver, a transmit antenna, and one or more receive antennas arranged to transmit a signal and to receive reflections of the signal from a region, whe
1. A system for the detection of munitions, the system comprising a radar, processing means and an indicator wherein the radar has a transmitter, a receiver, a transmit antenna, and one or more receive antennas arranged to transmit a signal and to receive reflections of the signal from a region, wherein the transmit and receive antennas are arranged to have transmit and receive beams oriented to include ground level coverage, wherein the one or more receive antennas comprise a plurality of antenna elements arranged to provide a plurality of receive beams, each having an associated receiver chain,and wherein the processor incorporates a Doppler filter arranged to reject received signals corresponding to a target outside of predetermined velocity limits, these velocity limits being chosen as representative of maximum and minimum velocities of the targets of interest in flight,the processor further being arranged to estimate, using the received signals, an impact location of a detected target,and further wherein the indicator is adapted to provide an indication when the estimated impact location is within a predetermined area or distance from the radar. 2. A system as claimed in claim 1 wherein the one or more antennas has a single transmit beam of relatively wide angular coverage in azimuth, and a plurality of relatively narrow receive beam lobes that together have similar angular coverage to the transmit beam. 3. A system as claimed in claim 2 wherein the transmit beam has an angular coverage of between 40° and 360°. 4. A system as claimed in claim 3 wherein the transmit beam has an angular coverage of between 90° and 130°. 5. A system as claimed in claim 1 wherein the antenna is a fixed orientation antenna. 6. A system as claimed in claim 1 wherein the processor is additionally arranged to measure a Doppler profile of received signals, and to match the profile against that expected for a target of interest, and to reject signals that do not match the expected profile. 7. A system as claimed in claim 6 wherein the processor is arranged to process returns to detect target range, radial acceleration and radial jolt parameters, and to filter out responses if the acceleration is not within predefined limits, as defined in a look-up table. 8. A system as claimed in claim 1 wherein the radar is arranged to transmit an unmodulated continuous wave (CW) waveform. 9. A system as claimed in claim 1 wherein the radar is arranged to transmit a modulated Continuous Wave (CW) waveform. 10. A system as claimed in claim 9 wherein the system further comprises a switch for switching between an unmodulated CW mode and a modulated mode, wherein it is arranged to operate initially in an unmodulated CW mode until a target detection has occurred, and to switch to the modulated CW mode following the detection, to provide target range information. 11. A system as claimed in claim 1 wherein the receive beams comprise sum and/or difference beams, the sum and/or difference beams being created by vectorial addition and/or subtraction of individual receive antenna beams. 12. A system as claimed in claim 1 wherein, on receive, the antenna is arranged to have a plurality of antenna elements spaced in elevation to allow the receiver to implement interferometric target elevation measurement. 13. A system as claimed in claim 1 wherein the system is adapted to generate one or more nulls in the direction of the ground where ground reflections are likely to result from a target. 14. A system as claimed in claim 3 wherein the receive beam lobes are processed to provide monopulse functionality in the azimuth plane, and to indicate a likely launch point of the target. 15. A system as claimed in claim 1 wherein the indication means comprises a siren, klaxon, or other audible indicator.
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이 특허에 인용된 특허 (3)
McCoy Richard D. ; Stirman Charles E. ; O'Sullivan James N. ; Gordon Yvette M., Apparatus for and method of classifying patterns.
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