IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0424493
(2006-06-15)
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등록번호 |
US-7779703
(2010-09-13)
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발명자
/ 주소 |
- Veselovsky, Jeffrey S.
- Van De Laare, Dean
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
9 |
초록
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Methods, systems, and articles of manufacture consistent with the present invention provide for aligning a removable device relative to a vehicle using an angle sensor device and a computer system operatively connected to the angle sensor device. The angle sensor device has a first local axis and a
Methods, systems, and articles of manufacture consistent with the present invention provide for aligning a removable device relative to a vehicle using an angle sensor device and a computer system operatively connected to the angle sensor device. The angle sensor device has a first local axis and a second local axis orthogonal to the first local axis and a plurality of accelerometers. The first pair of the accelerometers is mounted along the first local axis, spaced apart a first predetermined distance, and oriented such that each of the first pair of accelerometers is operatively configured to sense a respective acceleration when the angle sensor device is rotated about the second local axis. The computer system is operatively configured to derive a first angular displacement based on the respective acceleration sensed by each of the first pair of accelerometers when the angle sensor device is rotated about the second local axis.
대표청구항
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What is claimed is: 1. A method for measuring misalignment between a first mounting location on a vehicle and a second mounting location, the vehicle having a reference frame, the method comprising: aligning a local frame of reference at the first mounting location with the vehicle's reference fram
What is claimed is: 1. A method for measuring misalignment between a first mounting location on a vehicle and a second mounting location, the vehicle having a reference frame, the method comprising: aligning a local frame of reference at the first mounting location with the vehicle's reference frame; sensing net angular displacement of the local frame as it is removed from the first mounting location, moved to the second mounting location, and mounted at the second location such that the local frame is aligned with a reference frame at the second location; and using the net angular displacements to compute misalignment between the vehicle's reference frame and the reference frame at the second mounting location. 2. The method of claim 1, wherein aligning the local frame includes mounting a sensor system at the first mounting location, the sensor system providing the local frame of reference and including a plurality of accelerometers that are positioned along the local frame of reference such that the local frame of the sensor system coincides with the vehicle's reference frame; and wherein sensing the net angular displacement includes mounting the sensor system at the second mounting location such that the local frame of reference of the sensor system coincides with the reference frame at the second mounting location; and wherein a computer determines the net angular displacement of the local frame as the sensor system is moved between the first and second mounting locations, and uses the net angular displacements to compute the misalignment. 3. The method of claim 2, wherein the local frame provided by the sensor system has a first local axis, a second local axis orthogonal to the first local axis, a third local axis orthogonal to the first local axis and the second local axis, and wherein the plurality of accelerometers includes first pair of accelerometers along the first local axis, spaced apart a first predetermined distance, and oriented such that each accelerometer of the first pair used to sense a respective acceleration when the sensor system is rotated about the second local axis, wherein the first, second, and third local axis are aligned with a corresponding first, second, and third axis of the vehicle's reference frame when the sensor system is mounted at the first mounting location, and wherein the first, second, and third local axis are aligned with a corresponding first, second, and third axis of the reference frame at the second mounting location when the sensor system is mounted at the second mounting location. 4. The method of claim 3, wherein the sensor system includes a second pair of accelerometers along the second local axis, spaced apart a second predetermined distance, and oriented such that each accelerometer of the second pair is used to sense a respective acceleration when the sensor system is rotated about the first local axis; and wherein the computer derives a second angular displacement based on the respective acceleration sensed by each accelerometer of the second pair when the sensor system is rotated about the first local axis. 5. The method of claim 4, wherein the first pair of the accelerometers and the second pair of accelerometers share one accelerometer. 6. The method of claim 4, wherein the sensor system includes a third pair of the accelerometers along the first local axis, spaced apart a third predetermined distance, and oriented such that each accelerometer of the third pair is used to sense a respective acceleration when the sensor system is rotated about the third local axis; and wherein the computer derives a third angular displacement based on the respective acceleration sensed by each accelerometer of the third pair when the sensor system is rotated about the first local axis. 7. The method of claim 3, wherein the computer derives a first distance displacement associated with the acceleration sensed by a first accelerometer of the first pair and a second distance displacement associated with the acceleration sensed by a second accelerometer of the first pair and derives the first angular displacement based on a difference between the first and second distance displacements and the first predetermined distance. 8. The method of claim 3, wherein the sensor system is rotated about the second local axis when the sensor system is mounted at the second mounting location and the computer associates the derived angular displacement with a misalignment error of a removable device at the second mounting location. 9. The method of claim 1, wherein the misalignment indicates roll angle error, heading angle error, and pitch angle error. 10. The method of claim 1, wherein the vehicle has a removable device mountable at the second mounting location; and wherein the computed misalignment is used to boresight the removable device to the vehicle's reference frame. 11. The method of claim 10, wherein the vehicle is a helicopter and the removable device is a line replaceable unit.
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