Tire distortion detecting method, distortion detector, and tire thereof

Abstract

The present invention provides a tire distortion detecting method, a distortion detector, and a tire which can reduce the occurrence of a deterioration and can be used for a control system such as a stability control system. That is, series of conductors composed of a plurality of conductor pieces are provided in two different layers. The conductor pieces are embedded in lines at predetermined intervals in the circumferential direction of a tire. A pulsed electromagnetic wave is radiated to the surfaces of metal foils in the layers from a monitoring device provided in a tire house of a vehicle. The monitoring device receives a pulsed electromagnetic wave reflected from the metal foils in the layers or a member other than the metal foils. Time from the radiation of a pulsed electromagnetic wave to the reception of a reflected pulsed magnetic wave is measured repeatedly, time at which no distortion occurs on the tire is stored as a reference value, and the measured time and the stored reference value are compared with each other to detect a distortion of the tire.

1 . A tire, characterized in that series of conductors are embedded in two or more different layers with a part having no overlapping surfaces, the series of conductors being composed of a plurality of conductor pieces embedded in lines at predetermined intervals in a circumferential direction of the tire.  
     
     
         2 . The tire according to  claim 1 , characterized in that the conductor pieces are embedded in the tire so that the surfaces of the conductor pieces are almost in parallel with a surface of a tire tread.  
     
     
         3 . The tire according to  claim 1 , characterized in that the conductor pieces are embedded in the tire so that the surfaces of the conductor pieces are almost in parallel with a surface of a side wall of the tire.  
     
     
         4 . The tire according to  claim 1 , characterized in that at least in an outermost line of the conductor pieces relative to an axis of rotation of the tire at the center, the conductor pieces are arranged at regular intervals in the circumferential direction of the tire to set a length of the conductor piece in the circumferential direction of the tire equal to a length of a gap between the adjacent conductor pieces.  
     
     
         5 . The tire according to  claim 1 , characterized in that the conductor pieces are arranged so that in a second series of conductors provided inside a first series of conductors, ends of the conductor piece in the circumferential direction overlap, by a predetermined length, ends of the conductor piece in the circumferential direction of the tire in the first series of conductors which is outermost relative to an axis of rotation of the tire at the center.  
     
     
         6 . The tire according to  claim 1 , characterized in that the conductor pieces are arranged at regular intervals in the same layer.  
     
     
         7 . The tire according to  claim 1 , characterized in that the conductor pieces of the layers are arranged so that the conductor pieces in the two different layers are alternately arranged in the circumferential direction of the tire.  
     
     
         8 . The tire according to  claim 7 , characterized in that the conductor pieces of the layers are arranged so that the conductor pieces partly overlap each other in the circumferential direction of the tire.  
     
     
         9 . The tire according to  claim 1 , characterized in that the conductor pieces of the layers are displaced from each other in a width direction of the tire.  
     
     
         10 . The tire according to  claim 2 , characterized in that the conductor pieces of the layers are displaced from each other in a width direction of the tire.  
     
     
         11 . The tire according to  claim 3 , characterized in that the conductor pieces of the layers are displaced from each other in a width direction of the tire.  
     
     
         12 . The tire according to  claim 4 , characterized in that the conductor pieces of the layers are displaced from each other in a width direction of the tire.  
     
     
         13 . The tire according to  claim 5 , characterized in that the conductor pieces of the layers are displaced from each other in a width direction of the tire.  
     
     
         14 . The tire according to  claim 6 , characterized in that the conductor pieces of the layers are displaced from each other in a width direction of the tire.  
     
     
         15 . The tire according to  claim 7 , characterized in that the conductor pieces of the layers are displaced from each other in a width direction of the tire.  
     
     
         16 . The tire according to  claim 8 , characterized in that the conductor pieces of the layers are displaced from each other in a width direction of the tire.