发明名称 |
TYRE CONDITION MONITORING SYSTEM |
摘要 |
A monitoring system, particularly suitable for monitoring conditions (e.g. pressure or temperature) of a vehicle tyre comprises a passive sensor (102, 104), an antenna (106) associated with said passive sensor, and switching means (108) for controlling the connection between the passive sensor and the antenna such that, in a first state of said switching means, said antenna is prevented from transmitting a signal generated by the passive sensor, and, in a second state of said switching means, said antenna is permitted to transmit a signal generated by the passive sensor. The switching means is operated remotely by means of a control signal. The control signal may be derived from the sum or difference of RF signals (F1 and F2) applied to a filter (112). In alternative embodiments the control signal is the modulating frequency of an AM or FM modulated radio signal or a radio signal carrying a digital code.
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申请公布号 |
WO0145967(A1) |
申请公布日期 |
2001.06.28 |
申请号 |
WO2000GB04910 |
申请日期 |
2000.12.20 |
申请人 |
TRANSENSE TECHNOLOGIES PLC;LONSDALE, ANTHONY;LONSDALE, BRYAN;FREAKES, GRAHAM;VILE, DAVID;BECKLEY, JOHN |
发明人 |
LONSDALE, ANTHONY;LONSDALE, BRYAN;FREAKES, GRAHAM;VILE, DAVID;BECKLEY, JOHN |
分类号 |
G08C17/02;B60C23/00;B60C23/04;B60C23/20;G01L17/00;(IPC1-7):B60C23/04 |
主分类号 |
G08C17/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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