Method for estimating a trajectory orientation followed by a movement sensor carrier, corresponding device and computer program
First Claim
1. A method for estimating an orientation of a path followed by a carrier of a movement sensor, the method comprising:
- determining an orientation of the movement sensor with respect to the path followed by the carrier;
estimating, by processing circuitry, an orientation of the movement sensor with respect to a fixed reference linked to a terrestrial reference frame by measurements supplied by the movement sensor;
estimating, by the processing circuitry, an orientation of the path followed by the carrier with respect to the fixed reference by the determined orientation of the movement sensor with respect to the path and the estimated orientation of the movement sensor with respect to the fixed reference;
detecting a start and end of a phase of disorientation of the movement sensor with respect to the path; and
updating, by the processing circuitry, after the detected end of the disorientation phase, the determined orientation of the movement sensor with respect to the path based on the orientation of the path with respect to the fixed reference as estimated at the detected start of the disorientation phase and based on the orientation of the movement sensor with respect to the fixed reference as estimated after the detected end of the disorientation phase.
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Abstract
A method estimating orientation of a path followed by a carrier of a movement sensor includes: determining an orientation of the movement sensor with respect to the path; estimating an orientation of the movement sensor with respect to a fixed reference; estimating an orientation of the path with respect to the fixed reference by the determined orientation of the movement sensor and the estimated orientation of the movement sensor; detecting start and end of a phase of disorientation of the movement sensor with respect to the path; updating, after the detected end of the disorientation phase, determined orientation of the movement sensor with respect to the path by orientation of the path with respect to the fixed reference as estimated at the detected start of the disorientation phase and orientation of the movement sensor with respect to the fixed reference as estimated after the detected end of the disorientation phase.
17 Citations
10 Claims
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1. A method for estimating an orientation of a path followed by a carrier of a movement sensor, the method comprising:
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determining an orientation of the movement sensor with respect to the path followed by the carrier; estimating, by processing circuitry, an orientation of the movement sensor with respect to a fixed reference linked to a terrestrial reference frame by measurements supplied by the movement sensor; estimating, by the processing circuitry, an orientation of the path followed by the carrier with respect to the fixed reference by the determined orientation of the movement sensor with respect to the path and the estimated orientation of the movement sensor with respect to the fixed reference; detecting a start and end of a phase of disorientation of the movement sensor with respect to the path; and updating, by the processing circuitry, after the detected end of the disorientation phase, the determined orientation of the movement sensor with respect to the path based on the orientation of the path with respect to the fixed reference as estimated at the detected start of the disorientation phase and based on the orientation of the movement sensor with respect to the fixed reference as estimated after the detected end of the disorientation phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A device for estimating an orientation of a path followed by a carrier, comprising:
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a movement sensor configured to be carried by the carrier; storage for storing an orientation value of the movement sensor with respect to the path followed by the carrier; a computer connected to the movement sensor and to the storage, programmed to; estimate an orientation of the movement sensor with respect to a fixed reference related to a terrestrial reference frame by measurements supplied by the carrier, and estimate an orientation of the path followed by the carrier with respect to the fixed reference by the stored orientation value of the movement sensor with respect to the path and the estimated orientation of the movement sensor with respect to the fixed reference; a detector for a start and end of a phase of disorientation of the movement sensor with respect to the path; and wherein the computer is further programmed to update, after the detected end of the disorientation phase, the stored orientation value of the movement sensor with respect to the path based on the orientation of the path with respect to the fixed reference as estimated at the detected start of the phase of disorientation and based on the orientation of the movement sensor with respect to the fixed reference as estimated after the detected end of the disorientation phase. - View Dependent Claims (10)
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Specification