| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire monitoring system capable of receiving a radio wave with high gain transmitted from a sensor device provided in each tire by one antenna connected to a monitoring unit. SOLUTION: The antenna 50 connected to the monitoring unit and receiving a radio wave transmitted from the sensor device 30 provided in each tire 20 is provided in the window 11 of a vehicle 1. Preferably, the antenna 50 used herein includes a portion in which at least a part of an element can be extended in the vertical direction. A radio wave is radiated from the antenna 50, and the shape and the disposition of the antenna 50 that can maximize the field intensity at a position of each tire 20 are obtained by an actual measurement. Thus, a weak radio wave transmitted from each sensor device 30 can be received by the antenna 50 with high efficiency. COPYRIGHT: (C)2005,JPO&NCIPI |
