Robust system and method for auto-location of tire-based sensors
First Claim
1. A tire sensor locating system for auto-location of tire-based sensors comprising:
- a vehicle supported by a plurality of vehicle tires, each of the tires mounted to a wheel hub and each of the tires having a respective tire-based sensor operable to measure a tire air pressure;
a receiver for receiving from one of the tire sensors a measured tire air pressure at an un-identified sensor location on the vehicle;
a plurality of hub acceleration sensors mounted to the vehicle, each hub acceleration sensor operable to make a hub vertical acceleration measurement at a preset and known location on the vehicle for a respective one of the wheel hubs;
a chassis acceleration sensor mounted to a chassis of the vehicle operable to make a chassis vertical acceleration measurement for the vehicle chassis;
an estimator model for deriving a tire vertical stiffness estimation from the hub vertical acceleration measurements and the chassis vertical acceleration measurement;
a look-up table correlating tire vertical stiffness estimation against measured air pressure;
a processor operable to consult the look-up table and identify an assigned location of the one tire sensor from a correlation between the tire measured air pressure of the one tire and the tire vertical stiffness estimation of the one tire.
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Accused Products
Abstract
A tire sensor locating system for auto-location of a tire-based air pressure sensor at any tire location on a vehicle includes a hub acceleration sensor mounted to make a hub vertical acceleration measurement at a preset and known location on the vehicle for a respective one of the wheel hubs and a chassis acceleration sensor mounted to a chassis of the vehicle to make a chassis vertical acceleration measurement for the vehicle chassis. An estimator model is employed to derive a tire vertical stiffness estimation from the hub vertical acceleration measurements and the chassis vertical acceleration measurement. A look-up table correlates tire vertical stiffness estimation against measured tire air pressure and from the look-up table an assigned location of the tire sensor is made through a correlation between the tire measured air pressure and the tire vertical stiffness estimation.
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Citations
19 Claims
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1. A tire sensor locating system for auto-location of tire-based sensors comprising:
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a vehicle supported by a plurality of vehicle tires, each of the tires mounted to a wheel hub and each of the tires having a respective tire-based sensor operable to measure a tire air pressure; a receiver for receiving from one of the tire sensors a measured tire air pressure at an un-identified sensor location on the vehicle; a plurality of hub acceleration sensors mounted to the vehicle, each hub acceleration sensor operable to make a hub vertical acceleration measurement at a preset and known location on the vehicle for a respective one of the wheel hubs; a chassis acceleration sensor mounted to a chassis of the vehicle operable to make a chassis vertical acceleration measurement for the vehicle chassis; an estimator model for deriving a tire vertical stiffness estimation from the hub vertical acceleration measurements and the chassis vertical acceleration measurement; a look-up table correlating tire vertical stiffness estimation against measured air pressure; a processor operable to consult the look-up table and identify an assigned location of the one tire sensor from a correlation between the tire measured air pressure of the one tire and the tire vertical stiffness estimation of the one tire. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A tire sensor locating system for auto-location of tire-based sensors comprising:
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a vehicle supported by a plurality of vehicle tires, each of the tires mounted to a wheel hub and each of the tires having a respective tire-based sensor operable to measure a tire air pressure; a receiver for receiving from one of the tire sensors a measured tire air pressure at an un-identified sensor location on the vehicle; a plurality of hub acceleration sensors mounted to the vehicle, each hub acceleration sensor operable to make a hub vertical acceleration measurement at a preset and known location on the vehicle for a respective one of the wheel hubs; a chassis acceleration sensor mounted to a chassis of the vehicle operable to make a chassis vertical acceleration measurement for the vehicle chassis; an estimator model for deriving a tire vertical stiffness estimation from the hub vertical acceleration measurements and the chassis vertical acceleration measurement, wherein the estimator model comprises a tire deflection observer using the hub vertical acceleration measurements and the chassis vertical acceleration measurement independently of road surface variation; a look-up table correlating tire vertical stiffness estimation against measured air pressure; a processor receiving as inputs the tire vertical stiffness estimation and the tire measured air pressure, the processor operable to consult the look-up table and identify an assigned location of the one tire sensor from a correlation between the tire measured air pressure and the tire vertical stiffness estimation. - View Dependent Claims (9, 10, 11, 12)
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13. A method for auto-location of tire-based sensors for a vehicle supported by a plurality of vehicle tires, each of the tires mounted to a wheel hub and each of the tires having a respective tire-based sensor operable to measure a tire air pressure, the method comprising:
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receiving from one of the tire sensors a tire measured air pressure signal at an un-identified tire location on the vehicle; mounting a plurality of hub acceleration sensors to the vehicle, each hub acceleration sensor operable to make a hub vertical acceleration measurement at a preset and known location on the vehicle for a respective one of the wheel hubs; mounting a chassis acceleration sensor to a chassis of the vehicle operable to make a chassis vertical acceleration measurement for the vehicle chassis; deploying an estimator model for deriving a tire vertical stiffness estimation from the hub vertical acceleration measurements and the chassis vertical acceleration measurement; applying a look-up table correlating tire vertical stiffness estimation against measured air pressure; using as inputs the tire vertical stiffness estimation and the tire measured air pressure to consult the look-up table and identify an assigned location of the tire from a correlation between the tire measured air pressure and the tire vertical stiffness estimation. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification