Abstract:
A tire includes a plurality of tire components defining a plurality of layers. A radio frequency identification (RFID) tag is disposed between at least two of the plurality of layers. The RFID tag is in contact with each of the at least two layers and is configured to transmit a response signal in response to receiving a request signal. When no air is in a region surrounding the RFID tag, a first response signal is emitted from the tire at a first frequency and first power. However, when air is in the region surrounding the RFID tag, a second response signal is emitted from the tire at the first frequency and a second power different from the first power.
Abstract:
A method for determining a thickness of at least one tire (1) of a vehicle (2) during an operation of the vehicle (2) is provided. The at least one tire (1) comprises a tire wall (3) having an inner side (4) and an outer side (5) opposite the inner side (4). The method comprises the steps of: - transmitting a first beam (6) of ultrasonic waves having a first phase by an ultrasonic transmitter (7) arranged on the inner side (4), the first beam (6) of ultrasonic waves being transmitted through the tire wall (3), - receiving a second beam (8) of ultrasonic waves having a second phase by an ultrasonic receiver (9) arranged on the inner side (4), the second beam (8) of ultrasonic waves being reflected through the tire wall (3) by a surface (10) arranged outside of the at least one tire (1), - determining at least one first parameter selected from a time period between transmitting the first beam (6) of ultrasonic waves and receiving the second beam (8) of ultrasonic waves and a phase shift between the first phase and the second phase, - determining a thickness of the at least one tire (1) based on the at least one determined first parameter.
Abstract:
Au cours du procédé de détection de l'usure d'un pneumatique com- prenant des éléments de sculpture aptes à générer des premier et deuxième bruits d'empreinte acoustique (BEAI, BEA2), un des pre- mier et deuxième bruit d'empreinte acoustique (BEAI, BEA2) étant caractéristique de l'usure du pneumatique, on sélectionne, dans le spectre fréquentiel d'un signal acoustique acquis, un spectre Séquen- tiel père, susceptible de former le spectre fréquentiel de l'un des pre- mier et deuxième bruits d'empreintes acoustiques (BEAI, BEA2) et un spectre fréquentiel fils, susceptible de former le spectre fréquentiel de l'autre des premier et deuxième bruits d'empreintes acoustiques (BEAI, BEA2). On détermine deux indices de confiance, dit de détec- tion. Si chaque indice de confiance de détection satisfait une condi- tion prédéterminée, on émet une alerte de la détection de l'usure du pneumatique.