| 摘要 |
1. Device for monitoring the air pressure of vehicle tyres with a magnetic relay device linked to an electronic evaluating device, whereby the relay device comprises a pressure measuring device fixed to the wheel with integrated electric oscillating circuit and a threshold value dependent on the tyre pressure as well as a high-frequency transmitter fixed with respect to the axle, in which transmitter, depending on the tyre pressure, for every revolution of the wheel, impulses or impulse sequences are produced and are transformed into an indicating signal and in which two pressure measuring elements (3) with differing threshold values (P1 and P2 ) are associates with each vehicle wheel (11, 12) of the front and rear axle, characterized in that the one pressure measuring element (3) has a threshold value (P1 and P2 ) corresponding to the required tyre pressure of the front wheel (12) and the other pressure measuring element (3) has a threshold value (P1 and P2 ) corresponding to the required tyre pressure of the rear wheel (11). |
