The vehicle-mounted receiver of the present invention is included in a tire pressure monitoring system. The vehicle-mounted receiver is provided with a radio wave receiving unit (31) that receives a frame including information relating to tire pressure transmitted by transmitters (2a-2d) arranged on each of the tires of a plurality of wheels at a predetermined regular transmission period (T1), and a specific radio wave transmitted by a portable device (4). The vehicle-mounted receiver is provided with a control unit (33) that detects the occurrence of a decrease in the tire pressure on the basis of the data relating to the tire pressure included in the frame. When a start switch (SSW) of a vehicle is turned off, a control unit shifts to a specific mode for causing a radio wave receiving unit to receive a specific radio wave every predetermined first intermittent period (T5). In addition, when a start switch (SSW) of the vehicle is turned off, the control unit shifts from the specific mode or the power saving mode to a monitoring mode in which the radio wave receiving unit receives the frame and intermittently monitors the tire pressure every predetermined second intermittent period (T2).
本发明的车载接收机包含于胎压的监视系统。车载接收机具备电波接收部(31),该电波接收部接收帧和特定电波,其中,帧由布置于多个车轮的上述轮胎中的每个轮胎的发射机(2a~2d)以规定的定期发射周期(T1)发射的包含与胎压有关的信息的帧,特定电波是由便携机(4)发出的。车载接收机具备控制部(33),该控制部基于帧所包含的与胎压有关的数据来检测胎压降低的发生。在车辆的启动开关(SSW)断开中,控制部每隔规定的第一间歇周期(T5)移至使电波接收部进行特定电波的接收的特定模式。另外,在车辆的启动开关(SSW)断开中,控制部每隔规定的第二间歇周期(T2)从特定模式或省电模式移至使电波接收部进行帧的接收并间歇地监视胎压的监视模式。
Vehicle-mounted receiver and tire pressure monitoring system
车载接收机、胎压的监视系统
2024-09-03
Patent
Electronic Resource
Chinese
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |
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