Method and system for azimuthal containment using largest gap method
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0906566
(2010-10-18)
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등록번호 |
US-8149161
(2012-04-03)
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발명자
/ 주소 |
- Friesel, Mark A.
- Gillespie, Thomas R.
|
출원인 / 주소 |
- Lockheed Martin Coporation
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
4 |
초록
▼
A maximum gap method and system provide for identifying a space sector within which a system capable of engaging an object, should search for the object. A detector system that may be a radar or other active range determination system tracks position of the moving object and based on position estima
A maximum gap method and system provide for identifying a space sector within which a system capable of engaging an object, should search for the object. A detector system that may be a radar or other active range determination system tracks position of the moving object and based on position estimates and the uncertainties associated with the position estimates, generates a range of possible positions for each estimate then determines gaps between the uncertainties and derives the search sector based on the maximum gap.
대표청구항
▼
1. A method for identifying a space sector within which to search for an object, said method comprising: estimating three chronologically sequential positions of a moving object by a central detector, thereby obtaining three estimated sequential positions;assigning a degree of uncertainty to each sa
1. A method for identifying a space sector within which to search for an object, said method comprising: estimating three chronologically sequential positions of a moving object by a central detector, thereby obtaining three estimated sequential positions;assigning a degree of uncertainty to each said estimated sequential position, each said degree of uncertainty characterized by a minimum position and a maximum position;calculating gaps between said minimum and maximum positions of spatially adjacent ones of said estimated sequential positions;determining a maximum gap of said calculated gaps;identifying a space sector within which to search for said moving object based on said maximum gap; andproviding said identified space sector to a response system and said response system searching for and detecting said moving object in said identified space sector. 2. The method as in claim 1, wherein said space sector is bounded by extrema data points of said minimum positions and said maximum positions. 3. The method as in claim 2, wherein said identifying a space sector within which to search for said moving object based on said maximum gap comprises identifying which of said minimum and maximum positions is associated with said maximum gap and said search sector comprises a sector being complementary to said maximum gap. 4. The method as in claim 2, wherein said extrema data points comprise two data points on a circle thereby defining an arc and a complementary arc and said identifying a space sector includes determining whether said space sector comprises said arc or said complementary arc. 5. The method as in claim 4, wherein said maximum gap comprises one of said arc and said complementary arc and said search sector comprises the other of said arc and said complementary arc. 6. The method as in claim 1, wherein said identifying a space sector further identifies whether said space sector includes north. 7. The method as in claim 1, wherein each said estimated sequential position represents a primary azimuth on a circle and corresponding said minimum and maximum positions represent start and stop azimuths along a direction on said circle and which bound a corresponding said primary azimuth; said identifying a space sector within which to search for said moving object based on said maximum gap comprises performing a mathematical manipulation of said minimum and maximum positions associated with said estimated sequential positions; andsaid mathematical manipulation includes transforming data points of said three estimated sequential positions to produce three corresponding spatial data points arranged spatially according to azimuthal position of associated start azimuths along said circle. 8. The method as in claim 1, wherein said central detector comprises a remote sensor and said estimating and said assigning are performed by said remote sensor. 9. The method as in claim 1, wherein said estimating comprises said central detector transmitting said three estimated sequential positions to a further system and said assigning comprises said central detector transmitting said degrees of uncertainty to said further system. 10. The method as in claim 1, wherein said three estimated sequential positions are propagated from a time of an initial observation to two later times, using a trajectory model. 11. The method as in claim 1, wherein each said degree of uncertainty defines a range of possible locations of each corresponding said estimated sequential position, each said range including a corresponding numerical probability of containing said object and extending from an associated said minimum position to an associated said maximum position. 12. The method as in claim 1, wherein each said estimated sequential position represents a primary azimuth on a circle, corresponding said minimal and maximum positions further represent minimal and maximum azimuths on said circle, and said space sector is represented by an arc on said circle. 13. The method as in claim 1, further comprising said response system firing at said object. 14. The method as in claim 1, wherein said estimating comprises radar detection by a radar system. 15. A system for identifying a space sector within which to search for an object, said system comprising: a central detector for estimating at least three chronologically sequential positions of a moving object and assigning a degree of uncertainty to each said estimated position thereby obtaining three estimated sequential positions, each said degree of uncertainty characterized by a minimum position and a maximum position;a processor for calculating gaps between minimum and maximum positions of spatially adjacent ones of said estimated sequential positions and determining a maximum gap of said calculated gaps and for identifying a space sector within which to search for said moving object, based on said maximum gap; andmeans for providing said space sector to an active range determination system capable of engaging said moving object. 16. The system as in claim 15, wherein said central detector and said processor are part of a unitary system. 17. The system as in claim 15, wherein said central detector comprises a radar system. 18. The system as in claim 15, wherein said active range determination system comprises a defense radar system capable of receiving information describing said space sector and firing upon said moving object. 19. The system as in claim 15, wherein said processor executes a program stored on a computer readable medium for calculating said gaps and for identifying said space sector. 20. The system as in claim 15, wherein said central detector presents said three estimated sequential positions as azimuths on a circle, corresponding said minimum and maximum positions as corresponding start and stop azimuths along a direction on said circles and said space sector as an arc of a circle. 21. The system as in claim 20, wherein said processor performs a mathematical transformation of data points of said three estimated sequential positions to produce three corresponding spatial data points used to determine said maximum gap and said space sector. 22. The systems as in claim 15, wherein said space sector is bounded by extreme data points of said minimum positions and maximum positions and comprises an arc of a circle and wherein said processor further identifies whether said arc of said circle includes north. 23. The system as in claim 15, wherein said processor further identifies whether said space sector contains north.
이 특허에 인용된 특허 (4)
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Friesel,Mark A., Determination of the presence of closely spaced targets.
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Takahashi Toshiya (Tokyo JPX) Sato Yoshikuni (Tokyo JPX), Information transferring apparatus.
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Dimsdale,Jerry; Brunkhart,Mark, Integrated system for quickly and accurately imaging and modeling three-dimensional objects.
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Poisner David I., System for programming peripheral with address and direction information and sending the information through data bus or.
이 특허를 인용한 특허 (3)
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Pedersen, Richard N.; Friesel, Mark A.; Mountcastle, Paul D., Classification systems and methods using convex hulls.
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Pedersen, Richard N.; Friesel, Mark A.; Mountcastle, Paul D., Classification systems and methods using convex hulls.
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Friesel, Mark A., System and method for cued acquisition azimuth and elevation extent calculation using perspective projection.
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