| 摘要 |
<p>A device (1) for monitoring the tyre of a wheel of a vehicle is configured for detecting and transmitting to a receiver, through a wireless connection, information regarding at least one characteristic quantity of the state of the tyre, in particular its inflating pressure. The monitoring device (1) has a body (2, 3) for housing a circuit (16-18) designed to transmit the aforesaid information to the receiver at at least one substantially predetermined radiofrequency. The body (2, 3) is prearranged for being fixed to the rim of the wheel in a position external to the tyre and so as to face at least partly towards the outside of the rim. The body (2, 3) comprises a first body part (2), made of a first material, and a second body part (3) made of a second material, the first and second body parts (2, 3) defining between them a housing (4) for the circuit (16-18). At least the second material is a synthetic material having an electrical permittivity that is substantially constant at said at least one predetermined frequency. Preferably the first and second body parts (2, 3) are rigid and are fixed together by clinching or local mechanical deformation of the first body part (2) on the second body part (3). The synthetic material is preferably a polyphthalamide or PPA based resin.</p> |
