Patent ID: 7696902

Claim:
A tire sensor device comprising: plurality of sensor devices installed at predetermined locations of a tire; and a base station arranged in a tire interior and which communicates with the plurality of sensor devices; wherein each of the sensor devices has a sensor which detect a condition of the tire and a communication device, the base station comprises: an internal communication device having a first antenna and communicating with the plurality of sensor devices; an information processing device which processes a tire information signal wherein the tire information signal is information of condition of the tire detected in the sensor; and an external communication device having a second antenna and transmitting processed tire information to a car body side, wherein: the first antenna is arranged on a tire air chamber side of a wheel, the second antenna is arranged on an opposite side to the tire air chamber side of the wheel, and the communication device of the sensor devices has an antenna arranged on the tire air chamber side and is operable to communicate with only the base station and other sensor devices.