Patent ID: 8063756
Filing Date: 2011-11-22
Classification: B60C

Abstract:
1. A tire pressure monitor, which is provided on a wheel of a vehicle to monitor inflation pressure of a tire fitted on the wheel, said tire pressure monitor comprising: a pressure sensor working to sense the inflation pressure of the tire and output a pressure signal representative of the sensed inflation pressure; a transmitter working to transmit the pressure signal output from the pressure sensor; an acceleration sensor working to sense a centrifugal acceleration, which increases with running speed of the vehicle, and output an acceleration signal representative of the sensed centrifugal acceleration; and a controller working to determine state of motion of the vehicle and control the transmitter to transmit the pressure signal according to the determined state of motion, wherein the controller is configured to: determine a change in the centrifugal acceleration for a predetermined time period based on the acceleration signal output from the acceleration sensor, determine the vehicle as being in running state when the determined change is greater than or equal to a predetermined threshold, and control the transmitter to transmit the pressure signal when the vehicle is determined as being in running state.