Patent ID: 11946948
Assignee: HYUNDAI MOTOR COMPANY
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 6:
7. A method of detecting road condition, the method comprising:
determining, by a controller, whether a vehicle satisfies a first update condition in which the vehicle is stopped for more than a predetermined reference time and a second update condition in which a slope of a road on which the vehicle is stopped is equal to or less than a predetermined reference slope;
updating, by the controller, a reference acceleration value by adjusting a magnitude of a value of gravity acceleration measured while the vehicle is stopped as a reference acceleration value when the controller concludes that the first update condition and the second update condition are satisfied as a result of the determining;
determining, by the controller, whether a difference value between the value of the gravity acceleration measured during operation of the vehicle and the reference acceleration value is within a predetermined threshold range; and
determining, by the controller, the road corresponding to a position at which the value of the gravity acceleration is measured as being in an abnormal condition when the controller concludes that the difference value is out of the predetermined threshold range as a result of the determining,
wherein the reference acceleration value is a compensation value added to the value of the gravity acceleration to correct the value of the gravity acceleration measured during the operation of the vehicle based on a zero reference point.