IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0115432
(1993-09-01)
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발명자
/ 주소 |
- Gilbert Charles (Sunnyvale CA) Kersey Steve (Elgin IL) Janky James M. (Los Altos CA)
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| 출원인 / 주소 |
- Trimble Navigation Limited (Sunnyvale CA 02)
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| 인용정보 |
피인용 횟수 :
57 인용 특허 :
0 |
초록
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Mobile system apparatus for accurately determining the location of a designated object, spaced apart from the apparatus, without having to approach the designated object. The invention uses a Satellite Positioning System (SATPS), such as GPS or GLONASS, to determine the SATPS location of a first ref
Mobile system apparatus for accurately determining the location of a designated object, spaced apart from the apparatus, without having to approach the designated object. The invention uses a Satellite Positioning System (SATPS), such as GPS or GLONASS, to determine the SATPS location of a first reference SATPS station, whose location is known with high accuracy, and of a second mobile SATPS station. The second mobile SATPS station uses two SATPS signal antennas, spaced apart a known distance but arbitrarily oriented. SATPS antennas at the first and second SATPS stations each receive SATPS signals from a plurality of SATPS satellites that can be used to determine the location of each antenna. The location of each SATPS antenna may be determined using differential corrections for the location of the first SATPS station antenna. The locations of the two SATPS signal antennas at the second SATPS station define a baseline for purposes of determination angular orientation. This angular orientation information, plus information provided by angle and range readouts for the designated object from a rangefinder positioned adjacent to the second SATPS station, allows determination of the location of the designated object without requiring use of magnetic field-dependent instruments such as magnetic compasses that may be inaccurate when used adjacent to metal structures or sources of intense electromagnetic fields. Another approach uses triangulation of the designated object location from two or more spaced apart known locations of the second SATPS station and does not require angular orientation information. Information on the location of the designated object can be processed at the second SATPS station, at the first SATPS station, or at any other place that has SATPS signal processing equipment.
대표청구항
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Apparatus for accurately determining the location of a designated object from a position spaced apart from the object, without requiring that the object be approached, the apparatus comprising: a first SATPS station whose location is known with high accuracy, the first station comprising: a first SA
Apparatus for accurately determining the location of a designated object from a position spaced apart from the object, without requiring that the object be approached, the apparatus comprising: a first SATPS station whose location is known with high accuracy, the first station comprising: a first SATPS antenna to receive SATPS signals from a plurality of SATPS satellites; a first SATPS receiver/processor, connected to the first SATPS antenna, to receive the SATPS signals from the first SATPS antenna, to determine the location of the first SATPS antenna and to determine an SATPS location correction that is the difference between the SATPS-determined location of the first SATPS antenna and the known location for the first SATPS antenna; and a correction signal transmitter, connected to the first SATPS receiver/processor, to receiver and transmit the SATPS location correction information; a mobile second SATPS station comprising: second and third SATPS antennas, positioned a known separation distance d apart, to receive SATPS signals from a plurality of SATPS satellites; a correction signal receiver, connected to the second SATPS receiver/processor, to receive the SATPS location correction information from the first SATPS station; and a second SATPS receiver/processor, connected to the second SATPS antenna and to the correction signal receiver, to receive the SATPS signals from the first SATPS antenna, to receive the SATPS location correction information from the correction signal receiver, to determine the location of the second and third SATPS antennas and to correct the SATPS-determined location of at least one of the second and third SATPS antennas, using the SATPS location correction information; and location determination means, located adjacent to the second or third SATPS antenna, for determining the length of an object vector and the angular orientation of the object vector relative to a selected reference line passing adjacent to the second and third SATPS antennas, where the object vector extends from the location determination means to the designated object.
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