| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire internal pressure information measuring device capable of elongating a service life of a battery by suppressing waste electric power consumed while a CPU is in a waiting state. SOLUTION: A sensor module main body has a pressure sensor 24 for detecting pneumatic pressure inside a tire and a temperature sensor 25 for detecting temperature inside the tire. After operated at a high frequency clock and commanding the pressure sensor 24 and the temperature sensor 25 to acquire tire internal information, the CPU 21 is operated at a low frequency clock until stable time of the pressure sensor 24 and the temperature sensor 25 passes. After operated at a high frequency clock, transmitting tire internal information acquired in the pressure sensor 24 and the temperature sensor 25 to an external receiving device at constant time intervals and transmitting the tire internal information, the CPU 21 is operated at a low frequency clock until a constant time interval passes. COPYRIGHT: (C)2009,JPO&INPIT
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