Patent ID: 6408690
Filing Date: 2002-06-25
Classification: B60C

Abstract:
A system for monitoring a tire pressure of a tire of a vehicle, the system comprises a sensor module attached to the tire and comprises a monitor,the sensor module comprising: a motion switch for detecting when the vehicle is in motion at a minimum speed; a sensor for sensing the tire pressure of the tire between the minimum speed and a maximum speed, and a transmitter for retransmitting a message within a message time a plurality of times when the vehicle is in motion between the minimum speed and the maximum speed, a burst of a plurality of messages is retransmitted within a burst time, the message indicating the tire pressure, the message time being less than Â½ duration of a revolution of the tire when rotating at a high rate corresponding to the maximum speed, the burst time being less than Â½ duration of a revolution of the tire when rotating at a low rate corresponding to the minimum speed; the and the monitor comprising: a receiver for receiving the message.