METHOD FOR DETECTING STRAIN STATE OF TIRE, DEVICE FOR DETECTING THE STRAIN STATE, SENSOR UNIT FOR THE METHOD AND DEVICE, AND TIRE PROVIDED WITH THE SENSOR UNIT

The present invention provides a tire distortion detecting method for detecting a detection of the tire during the running of a vehicle, a distortion detector, a sensor unit thereof, and a tire having the same whereby the occurrence of a deterioration can be reduced and applicability is widened to a control system such as a stability control system. Sensor units 100 are embedded at some intervals in the circumferential direction of the tire. In the sensor unit 100, a conductor pattern is changed in shape according to a distortion of a tire 300 so as to change the resonance frequency of a radiated electromagnetic wave. An electromagnetic wave is radiated from a monitoring device 200 provided in a tire house 400 of the vehicle to the sensor unit 100, an electromagnetic wave radiated from the sensor unit 100, at least one of the intensity, phase, frequency of the received electromagnetic wave is detected, and the detection result is compared with a detection result stored when no distortion occurs on the tire 300, so that a distortion of the tire 300 is detected.