Location equipment
First Claim
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1. A location-equipment comprising:
- wheel sensors installed in left and right wheels of a vehicle, each for generating a pulse signal as a corresponding one of the left and right wheels rotates;
a GPS receiver for receiving GPS signals sent from GPS satellites;
a calibration means for calibrating scale factors used for calculating distances traveled by the left and right wheels from the pulse signals delivered from said wheel sensors based on the GPS signals received by said GPS receiver; and
an estimation means for estimating vehicle position and movement from the GPS signals received by said GPS receiver and the pulse signals delivered from said wheel sensors by using the scale factors calibrated by said calibration means.
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Abstract
A location equipment includes a calibration unit (14) for calibrating scale factors used for calculating the distances traveled by left and right wheels of a vehicle from pulse signals delivered from wheel sensors (11) respectively installed in the left and right wheels based on GPS signals received by a GPS receiver (12), and an estimation unit (15 and 16) for estimating vehicle position and movement from the GPS signals received by the GPS receiver and the pulse signals delivered from the wheel sensors by using the scale factors calibrated by the calibration unit.
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Citations
16 Claims
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1. A location-equipment comprising:
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wheel sensors installed in left and right wheels of a vehicle, each for generating a pulse signal as a corresponding one of the left and right wheels rotates;
a GPS receiver for receiving GPS signals sent from GPS satellites;
a calibration means for calibrating scale factors used for calculating distances traveled by the left and right wheels from the pulse signals delivered from said wheel sensors based on the GPS signals received by said GPS receiver; and
an estimation means for estimating vehicle position and movement from the GPS signals received by said GPS receiver and the pulse signals delivered from said wheel sensors by using the scale factors calibrated by said calibration means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification