Technique for calibrating dead reckoning positioning data
First Claim
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1. A method for calibrating sensor data used for dead reckoning positioning systems, the method comprising the steps of:
- simultaneously recording, by a storage unit, sensor data of at least one dead reckoning positioning sensor and position data of a position sensor during travel;
comparing, by a comparing unit, a shape of a first travel path derived from the position data with a shape of a second travel path derived from the sensor data, wherein the shape of the first travel path is defined by absolute position data recorded consecutively during travel, and wherein the shape of the second travel path depends on the recorded sensor data and on calibration parameters for calibrating the sensor data; and
calibrating, by a calibrating unit, the sensor data based on the shape comparison, wherein the calibrating step comprises iteratively refining the calibration parameters until the shape of the second travel path approximates the shape of the first travel path.
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Abstract
A technique for calibrating sensor data used for dead reckoning positioning comprises the steps of simultaneously recording sensor data of at least one dead reckoning positioning sensor and position data of a position sensor during travel, comparing a first travel path derived from the position data with a second travel path derived from the sensor data, and calibrating the sensor data based on the comparison.
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Citations
24 Claims
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1. A method for calibrating sensor data used for dead reckoning positioning systems, the method comprising the steps of:
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simultaneously recording, by a storage unit, sensor data of at least one dead reckoning positioning sensor and position data of a position sensor during travel; comparing, by a comparing unit, a shape of a first travel path derived from the position data with a shape of a second travel path derived from the sensor data, wherein the shape of the first travel path is defined by absolute position data recorded consecutively during travel, and wherein the shape of the second travel path depends on the recorded sensor data and on calibration parameters for calibrating the sensor data; and calibrating, by a calibrating unit, the sensor data based on the shape comparison, wherein the calibrating step comprises iteratively refining the calibration parameters until the shape of the second travel path approximates the shape of the first travel path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A device for calibrating sensor data used for dead reckoning positioning systems, comprising:
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a storage unit adapted to record simultaneously sensor data of at least one dead reckoning positioning sensor and position data of a position sensor during travel; a comparing unit adapted to compare a shape of a first travel path derived from the position data with a shape of a second travel path derived from the sensor data, wherein the shape of the first travel path is defined by absolute position data recorded consecutively during travel, and wherein the shape of the second travel path depends on the recorded sensor data and on calibration parameters for calibrating the sensor data; and a calibration unit adapted to calibrate the sensor data on basis of the shape comparison by iteratively refining the calibration parameters until the shape of the second travel path approximates the shape of the first travel path. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification