Method and apparatus for measuring velocity of land vehicle using accelerometer and route guidance information data
First Claim
1. A method of measuring the velocity of a vehicle, comprising the steps of:
- (1) storing an acceleration measurement received from an accelerator and route guidance information (RGI) data for route guidance of the vehicle, received from an external information server, to use to determine an irregularity constant of the accelerator;
(2) determining whether the vehicle is in a stationary state by analyzing the acceleration measurement and calculating the inclination angle of a road on which the vehicle is traveling using a plurality of three-dimensional shape points included in the RGI data if the vehicle is not in the stationary state;
(3) compensating for a gravity acceleration component from the acceleration measurement using the road inclination angle; and
(4) calculating the velocity of the vehicle using the compensated acceleration measurement.
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Abstract
A method and apparatus for measuring the velocity of a vehicle are provided. An acceleration measurement received from an accelerator and RGI data received from an external information server are stored and an irregularity constant of the accelerator is determined. It is determined whether the vehicle is in a stationary state by analyzing the acceleration measurement. If the vehicle is not in the stationary state, the inclination angle of a road on which the vehicle is traveling is calculated using a plurality of three-dimensional shape points included in the RGI data. A gravity acceleration component is compensated for from the acceleration measurement using the road inclination angle. The velocity of the vehicle is calculated using the compensated acceleration measurement.
13 Citations
13 Claims
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1. A method of measuring the velocity of a vehicle, comprising the steps of:
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(1) storing an acceleration measurement received from an accelerator and route guidance information (RGI) data for route guidance of the vehicle, received from an external information server, to use to determine an irregularity constant of the accelerator;
(2) determining whether the vehicle is in a stationary state by analyzing the acceleration measurement and calculating the inclination angle of a road on which the vehicle is traveling using a plurality of three-dimensional shape points included in the RGI data if the vehicle is not in the stationary state;
(3) compensating for a gravity acceleration component from the acceleration measurement using the road inclination angle; and
(4) calculating the velocity of the vehicle using the compensated acceleration measurement. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for measuring the velocity of a vehicle, comprising:
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an acceleration measurer for measuring a current acceleration of the vehicle through an accelerator mounted on the vehicle;
an acceleration storage for storing an acceleration measurement received from the acceleration measurer according to measured time;
a gravity acceleration compensator for calculating the inclination angle of a road on which the vehicle is traveling using a plurality of three-dimensional shape points included in RGI data received from an external server and compensating for a gravity acceleration component from the acceleration measurement using the road inclination angle; and
a velocity calculator for calculating the velocity of the vehicle using the compensated acceleration measurement. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification