Tire sensor localization utilizing speed corrected frequency
First Claim
1. A tire pressure monitoring system comprising:
- a plurality of tire pressure sensor and transmitter;
a receiver and control for receiving signals transmitted by each of said tire pressure sensor/transmitters;
said tire pressure sensor/transmitters including the ability to send an identification signal; and
a control associate with said sensor/transmitters monitoring vehicle speed, and adjusting the frequency of transmission of said identification signal to be dependent upon said detected vehicle speed.
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Accused Products
Abstract
A method of localizing the location of a received signal from a tire pressure sensor includes sending an AM identification signal. The AM signal is adjusted for speed such that the frequency of the signal equals a constant multiplied by the speed of the vehicle. Each of the tire locations on a vehicle have an expected sequence of black-out points in the signal received by a receiver at any point on the vehicle. That is, given a particular vehicle design, the AM signal described above would be received at a receiver with an expected sequence of received peaks and black-out points. Since the frequency of the signal is adjusted for speed, the received signal will accurately allow the location of black-out points to be utilized to identify the tire location for a particular signal.
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Citations
8 Claims
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1. A tire pressure monitoring system comprising:
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a plurality of tire pressure sensor and transmitter;
a receiver and control for receiving signals transmitted by each of said tire pressure sensor/transmitters;
said tire pressure sensor/transmitters including the ability to send an identification signal; and
a control associate with said sensor/transmitters monitoring vehicle speed, and adjusting the frequency of transmission of said identification signal to be dependent upon said detected vehicle speed. - View Dependent Claims (2, 3, 4, 5)
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6. A method of localizing a received signal from a vehicle comprising the steps:
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(1) identifying an expected sequence of black-outs in a received signal from each of four tire locations on a vehicle, and storing said expected sequence in a control;
(2) operating a vehicle and transmitting identification signals from each of said at least four tire locations on a vehicle, and receiving signals from each of said four tire locations, and identifying the sequence of black-outs in each of said four identified signals, said transmitting of said identification signal including the adjustment of the frequency of said transmission of said identification signal being based upon a detected vehicle speed; and
(3) comparing said sequence of black-out points in said received signals to said expected sequence of black-outs, and identifying a tire location for any of said sequence of said received signals which matches an expected sequence of said signals. - View Dependent Claims (7, 8)
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Specification