Apparatus and method for measuring rotation speeds of tires of vehicle
AssigneeHyundai Autron Co., Ltd.
InventorGuy Championnet
Life of this patent
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Abstract
The present invention relates detecting the rotation speed of tires for a vehicle. In the present invention, signals are received from a plurality of wheel speed sensors, a reverse gear sensor, and a brake sensor. Errors of the wheel speed sensors are estimated using the received signals, a signal having a corrected error is obtained using the estimated errors, linear interpolation. Accordingly, there is an advantage in that rotation speed of tires for a vehicle can be determined accurately.
Claims11
An apparatus for measuring rotation speed of tires of a vehicle, the apparatus comprising:
- a plurality of wheel speed sensors configured to generate signals corresponding to rotation speeds of the tires;
- a reverse gear sensor configured to generate a signal when a reverse gear operates;
- a brake sensor configured to generate a signal when a brake pedal operates;
- and
- a control unit configured to receive the signals from the plurality of wheel speed sensors, the reverse gear sensor, and the brake sensor, to calculate an signal error-corrected by estimating an error of a wheel speed sensor, to perform linear interpolation, and to determine the rotation speed of the tires.
A method for detecting rotation speed of tires of a vehicle, the method comprising:
- receiving signals from a plurality of wheel speed sensors and operation sensors mounted on the vehicle and processing the received signals;
- estimating sawtooth angle errors related to mechanical defects of the wheel speed sensors;
- calculating a corrected sawtooth time and a corrected angular velocity of each of the wheel speed sensors using the estimated sawtooth angle errors;
- interpolating an angular velocity at a fixed time interval using the corrected sawtooth time and the corrected angular velocity;
- and determining rotation speed of each of the tires for a left front wheel, a right front wheel, a left rear wheel, and a right rear wheel mounted on the vehicle based on the interpolation of the angular velocity.
A system for measuring rotation speed of tires of a vehicle, the system comprising:
- a wheel speed sensor unit configured to generate signals corresponding to rotation speeds of the tires;
- a reverse gear sensor unit configured to generate a signal when a reverse gear operates;
- a brake sensor unit configured to generate a signal when a brake pedal operates;
- and
- a control unit configured to receive the signals from the plurality of wheel speed sensors, the reverse gear sensor, and the brake sensor, to calculate an signal error-corrected by estimating an error of a wheel speed sensor, to perform linear interpolation, and to determine the rotation speed of the tires.
Dependencies are inferred from the claim text.