| 摘要 |
PROBLEM TO BE SOLVED: To provide a frequency calibration method for tire management system, which has high accuracy for transmitting frequency calibration of a sensor module. SOLUTION: After the sensor module 3 is resin molded, the transmitting frequency of the sensor module 3 is measured. The offset of the measured transmitting frequency to a transmitting frequency set within a program of the sensor module 3 is then determined, and the determined offset is recorded in a memory 3 by radio communication. The offset recorded in the memory 3 is read by a sensor module microcomputer 3c, and the transmitting frequency of the sensor module 3 is calibrated by the offset recorded in the memory within a program of the sensor module microcomputer 3c. The calibrated transmitting frequency is transmitted from the sensor module microcomputer 3c to a radio transmitting IC through a set port. COPYRIGHT: (C)2007,JPO&INPIT |
