DIRECT TIRE PRESSURE MONITORING

摘要

A power efficient direct Tire Pressure Monitoring System, TPMS, for providing a non-continuous tire pressure monitoring of a tire of a vehicle, such as a automobile vehicle, the TPMS comprising:
a processing unit having at least a first operating mode and a second operating mode;a timing unit;an acceleration measuring unit;a comparing unit;a pressure measuring unit;a transmitting unit; and,a power supplying unit for supplying power to the processing unit in the first and second operating modes wherein the latter mode is less power consuming than the former mode, wherein the processing unit is adapted to:
enter the second operating mode after an acceleration threshold and an operating clock frequency have been set; and,enter the first operating mode responsive to a first trigger signal.;A tire, a vehicle and a method are also claimed.

主权项

1. A direct Tire Pressure Monitoring System, TPMS, for providing a non-continuous tire pressure monitoring of a tire of a vehicle, such as an automobile vehicle, the TPMS comprising:
a processing unit having at least a first operating mode and a second operating mode; a timing unit operably coupled to the processing unit; an acceleration measuring unit operably coupled to the timing unit; a comparing unit operably coupled to the processing unit and the acceleration measuring unit; a pressure measuring unit operably coupled to the processing unit; a transmitting unit operably coupled to the processing unit; and, a power supplying unit for supplying power to at least the processing unit in the first operating mode and in the second operating mode wherein the second operating mode is less power consuming than the first operating mode, wherein: when operating in the first operating mode, the processing unit is adapted to set;
an operating clock frequency of the timing unit; and,an acceleration threshold of the comparing unit; the timing unit is adapted to activate the acceleration measuring unit at the rate of the operating clock frequency; the acceleration measuring unit is adapted to measure an acceleration value associated with the tire in at least one direction; the comparing unit is adapted to compare the acceleration value and the acceleration threshold and to generate a first trigger signal when the absolute acceleration value is greater than the acceleration threshold, and to direct the first trigger signal to the processing unit; when operating in the first operating mode, the processing unit is further adapted to activate the pressure measuring unit responsive to the first trigger signal; the pressure measuring unit is adapted to measure a pressure value associated with the tire; when operating in the first operating mode, the processing unit is further configured to generate a transmitting signal based on the pressure value; the transmitting unit is adapted to transmit the transmitting signal;and, wherein:
the processing unit is adapted to:
enter the second operating mode, once, after the acceleration threshold and the operating clock frequency have been set; and,enter the first operating mode, once, responsive to the first trigger signal.