Tire sensor-based robust road surface roughness classification system and method
First Claim
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1. A road classification system comprising:
- at least one tire supporting a vehicle;
a pressure sensor mounted to the at least one tire and being operable to measure an inflation pressure of the at least one tire;
an identification tag mounted to the at least one tire and being operable to identify the at least one tire by an identification code;
a processor in electronic communication with the pressure sensor to receive the measurement of inflation pressure, and in electronic communication with the identification tag to receive the identification code;
a tire construction database in electronic communication with the processor and being operable for identifying a tire construction type for the at least one tire from the identification code;
a vehicle-mounted axle vertical acceleration sensor operable to measure a vertical acceleration of an axle of the vehicle; and
a road surface classification model in electronic communication with the processor and with the axle vertical acceleration sensor for concluding a road surface condition based on measured changes in an axle vertical acceleration as measured by the axle vertical acceleration sensor and a tire inflation pressure as measured by the pressure sensor and a tire construction type as identified by the identification tag and the tire construction database.
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Abstract
A road classification system for determining a road surface condition includes a model having as an input changes in the measured axle vertical acceleration of the vehicle. The model further uses a sensor-measured tire inflation pressure and a tire construction type ascertained from a tire-based identification tag.
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Citations
14 Claims
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1. A road classification system comprising:
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at least one tire supporting a vehicle; a pressure sensor mounted to the at least one tire and being operable to measure an inflation pressure of the at least one tire; an identification tag mounted to the at least one tire and being operable to identify the at least one tire by an identification code; a processor in electronic communication with the pressure sensor to receive the measurement of inflation pressure, and in electronic communication with the identification tag to receive the identification code; a tire construction database in electronic communication with the processor and being operable for identifying a tire construction type for the at least one tire from the identification code; a vehicle-mounted axle vertical acceleration sensor operable to measure a vertical acceleration of an axle of the vehicle; and a road surface classification model in electronic communication with the processor and with the axle vertical acceleration sensor for concluding a road surface condition based on measured changes in an axle vertical acceleration as measured by the axle vertical acceleration sensor and a tire inflation pressure as measured by the pressure sensor and a tire construction type as identified by the identification tag and the tire construction database. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A road classification system comprising:
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at least one tire supporting a vehicle; a pressure sensor mounted to the at least one tire and being operable to measure an inflation pressure of the at least one tire; an identification tag mounted to the at least one tire and being operable to identify the at least one tire by an identification code; a processor in electronic communication with the pressure sensor to receive the measurement of inflation pressure, and in electronic communication with the identification tag to receive the identification code; a tire construction database in electronic communication with the processor and being operable for identifying a tire construction type for the at least one tire from the identification code; a vehicle-mounted axle vertical acceleration sensor operable to measure a vertical acceleration of an axle of the vehicle; a vehicle-mounted speed sensor operable to measure a vehicle speed; a vehicle-mounted sensor operable to indicate a suspension damper setting; and a road surface classification model in electronic communication with the processor and with the axle vertical acceleration sensor, the speed sensor and the suspension damper sensor, for making a road surface condition conclusion based on changes in an axle vertical acceleration as measured by the axle vertical acceleration sensor, the tire inflation pressure as measured by the pressure sensor, a tire construction type as identified by the identification tag and the tire construction database, the vehicle speed as measured by the speed sensor and a suspension damper setting as indicated by the suspension damper sensor. - View Dependent Claims (8, 9)
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10. A method of road classification comprising the steps of:
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mounting an air pressure measuring sensor to a tire supporting a vehicle, the sensor operable to measure a tire inflation pressure of the tire; mounting an identification tag to the tire operable to identify the tire by an identification code; receiving the measurement of tire inflation pressure and the identification code on a processor that is in electronic communication with the air pressure measuring sensor and the identification tag; employing a tire construction database that is in electronic communication with the processor and which is operable to identify a tire construction type for the tire from the identification code; mounting an axle vertical acceleration sensor to the vehicle operable to measure an axle a vertical acceleration of an axle of the vehicle; employing a road surface classification model in electronic communication with the processor and with the axle vertical acceleration sensor for making a road surface condition conclusion based on changes in an axle vertical acceleration as measured by the axle vertical acceleration sensor, a tire inflation pressure as measured by the air pressure measuring sensor and a tire construction type as identified by the identification tag and the tire construction database. - View Dependent Claims (11, 12, 13, 14)
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Specification