System and method for performing auto-location of a tire pressure monitoring sensor arranged with a vehicle wheel using confidence interval analysis and change of wheel direction

摘要

A method for determining change of direction of a vehicle includes steps of maintaining a rolling window of ABS data indicative of ABS tooth count and capturing a relevant rolling window of ABS data at the predetermined one-measurement point; storing the rolling window of the ABS data indicative of ABS tooth in a buffer; monitoring the ABS data and detecting a valid stop event which causes the rate of change of ABS tooth count to substantially decrement to zero; and monitoring the ABS data and detecting a valid move event which causes the rate of change of ABS tooth count to substantially increment from zero. The method also includes steps of determining a pre-stop phase relationship between at least two wheels based on the ABS tooth count stored in the buffer immediately prior to the valid stop event; determining a post-start phase relationship between at least two wheels based on the ABS tooth count stored in the buffer immediately subsequent to the valid move event; and correlating the pre-stop phase relationship and the post-start phase relationship to determine change of direction and confidence level.

主权项

1. A method for determining a change of direction of a vehicle, comprising:
maintaining a rolling window of ABS anti-lock brake system (“ABS”) data indicative of an ABS tooth count and capturing a relevant rolling window of the ABS data at a predetermined one-measurement point; storing the rolling window of the ABS data indicative of the ABS tooth count in a buffer; monitoring the ABS data and detecting a valid stop event based, at least in part, on detecting a rate of change of the ABS tooth count substantially decrementinq to zero; monitoring the ABS data and detecting a valid move event based, at least in part, on detecting the rate of change of the ABS tooth count substantially incrementing from zero; determining a pre-stop phase relationship between at least two wheels based on the ABS tooth count stored in the buffer immediately prior to the valid stop event; determining a post-start phase relationship between the at least two wheels based on the ABS tooth count stored in the buffer immediately subsequent to the valid move event; and correlating the pre-stop phase relationship and the post-start phase relationship to determine the change of direction.