Tire system

A tire system comprising:

• a tire-side device attached to a tire of a vehicle and configured to transmit data related to a detection target among a plurality of types of detection targets related to the tire;
• and
• a vehicle-body-side system attached to a body of the vehicle and configured to receive the data and acquire a detection result for the detection target, wherein:
• the tire-side device includes
• a sensing unit configured to output a detection signal corresponding to each of the plurality of types of detection targets,
• a signal processing unit configured to perform processing of the detection signal and generate the data related to the detection target, and
• a first data communication unit configured to perform bidirectional communication with the vehicle-body-side system and transmit the data to the vehicle-body-side system;
• the vehicle-body-side system includes
• a second data communication unit configured to perform bidirectional communication with the tire-side device and receive the data, and
• a control unit configured to acquire the detection result for the detection target based on the data;
• the vehicle-body-side system transmits a request signal that requests which detection target is required among the plurality of types of detection targets to the tire-side device through the second data communication unit;
• the tire-side device generates, based on the request signal, the data related to the detection target indicated by the request signal and transmits the data to the vehicle-body-side system through the first data communication unit;
• the plurality of types of detection targets include a wear state of the tire and a road surface state of a road surface on which the tire is traveling;
• the vehicle-body-side system transmits, as the request signal, a signal indicating that the detection target is the wear state at least once in a period from a time point when a start switch of the vehicle is turned on to a time point the start switch is turned off;
• when the signal indicating that the detection target is the wear state is transmitted as the request signal, the tire-side device generates data related to the wear state and transmits the data to the vehicle-body-side system through the first data communication unit;
• and
• when the request signal is not transmitted, the tire-side device generates data related to the road surface state as the detection target by measuring in a normal mode and transmits the data to the vehicle-body-side system through the first data communication unit.