Pneumatic Tire and Vehicle
A pneumatic tire includes a surface and is rotatable about a center axis. The surface of the pneumatic tire includes a ground colored region including a surface of rubber, and an image recognition belt region including a colored region provided in a circumferential direction of the center axis.
1 . A pneumatic tire rotatable about a center axis, comprising:
a surface;
the surface including:
a ground colored region including a surface of rubber, and
an image recognition belt region including a colored region provided in a circumferential direction of the center axis.
2 . The pneumatic tire according to claim 1 , further comprising:
a main groove provided in the circumferential direction; wherein
the colored region of the image recognition belt region includes an inner surface of the main groove.
3 . The pneumatic tire according to claim 2 , wherein:
the inner surface of the main groove includes a bottom surface, a first wall surface disposed on a first side of the bottom surface, and a second wall surface disposed on a second side of the bottom surface in a direction parallel to the center axis; and
an angle formed by the first wall surface and the second wall surface is not less than 30° and not greater than 120°.
4 . The pneumatic tire according to claim 1 , wherein:
a dimension of the colored region in the direction parallel to the center axis is 10 mm or greater.
5 . The pneumatic tire according to claim 1 , wherein:
the colored region of the image recognition belt region is a speed measurement belt region including a plurality of colored regions provided intermittently in the circumferential direction of the center axis.
6 . The pneumatic tire according to claim 5 , wherein:
dimensions in the circumferential direction of the plurality of colored regions of the speed measurement belt region differ from each other.
7 . The pneumatic tire according to claim 5 , wherein:
the speed measurement belt region including the plurality of colored regions provided intermittently in the circumferential direction of the center axis is a unique information identification belt region for identifying unique information.
8 . The pneumatic tire according to claim 7 , wherein:
the unique information identification belt region includes a one-dimensional bar code formed by a plurality of the colored regions and the ground colored regions for which numbers and dimensions in the circumferential direction are determined on the basis of the unique information.
9 . The pneumatic tire according to claim 7 , wherein:
the unique information includes a wear state of the tread portion.
10 . The pneumatic tire according to claim 7 , wherein:
the unique information identification belt region includes
a first unique information identification belt region provided on a surface of the tread portion, and
a second unique information identification belt region embedded in tread rubber of the tread portion.
11 . The pneumatic tire according to claim 7 , wherein:
the unique information includes at least one of a tire manufacturing date, a maximum tire traveling speed, a tire dimension, a tire type, or a tire performance.
12 . The pneumatic tire according to claim 7 , wherein:
the unique information includes unique information of a vehicle on which the pneumatic tire is to be mounted.
13 . The pneumatic tire according to claim 1 , wherein:
reflectance of the colored region with respect to visible light is greater than reflectance of the ground colored region.
14 . The pneumatic tire according to claim 1 , further comprising:
a shoulder portion; wherein
the colored region is provided on a surface of the shoulder portion.
15 . The pneumatic tire according to claim 1 , wherein:
the colored region includes a surface of a coating material applied to the rubber.
16 . The pneumatic tire according to claim 15 , wherein:
the coating material includes a fluorescent coating material.
17 . The pneumatic tire according to claim 15 , wherein:
the coating material includes a retroreflective material.
18 . The pneumatic tire according to claim 1 , further comprising:
colored rubber containing a colorant; wherein
the colored region includes a surface of the colored rubber.
19 . A vehicle, comprising:
a plurality of wheels; and
the pneumatic tire described in claim 1 ; wherein
the pneumatic tire is mounted on at least a rearmost wheel of the plurality of wheels.
20 . The vehicle according to claim 19 , further comprising:
a lighting device configured to illuminate the pneumatic tire mounted on the rearmost wheel.