Tire and tire rim assembly

Abstract

The tire includes at least an electrically conductive rubber. The conductive rubber has a contact portion provided at a position in contact with the rim.

Description

Technical Field

[0001] The technology of the present disclosure relates to a tire and a tire - rim assembly. Background Art

[0002] In Japanese Patent Laid - Open No. 2006 - 208052, a strain sensor for a rubber article is disclosed, which can measure the strain of rubber articles such as tires in a relatively large range of up to about several hundred%. The strain sensor for a rubber article is composed of a strain - detecting rubber composition containing conductive particles, and can measure the change in resistance caused by the strain generated with an external load, thereby detecting the strain.

[0003] In Pamphlet of International Publication No. 2021 / 124992, an inference device is disclosed, which can infer the deformation of a member without directly measuring the deformation. The inference device includes an inference unit that inputs two physical quantities corresponding to at least two physical quantities other than the target physical quantity of an inference object to a learning model, which uses at least three physical quantities including different types of physical quantities that change corresponding to the deformation of a linearly or non - linearly deformed member and including a target physical quantity associated with time - series information as learning data and is learned to input at least two physical quantities other than the target physical quantity and output the target physical quantity, and infers the target physical quantity corresponding to the inference object. Summary of the Invention

[0004] Problems to be Solved by the Invention

[0005] In Japanese Patent Laid - Open No. 2006 - 208052 and Pamphlet of International Publication No. 2021 / 124992, no structure for outputting the strain detected by the strain sensor for a rubber article to the outside of the tire is described.

[0006] The technology of the present disclosure is completed in view of the above problems, and its purpose is to provide, as an example, a tire and a tire - rim assembly capable of outputting the strain detected by conductive rubber to the outside.

[0007] Solutions to the Problems

[0008] The first aspect of the technology of the present disclosure is a tire, which at least includes conductive rubber, and the conductive rubber has a contact portion provided at a position in contact with the rim.

[0009] Based on the tire of the first aspect, in the second aspect of the technology of the present disclosure, the contact portion is provided at the bead portion.

[0010] Based on the tire of the first or second aspect of the technology of the present disclosure, the tire has a plurality of structural parts, and conductive rubber is provided on at least one of the plurality of structural parts.

[0011] Based on the tire of the third aspect of the technology of the present disclosure, the plurality of structural parts include a tread portion, a shoulder portion, a sidewall portion, and a bead portion.

[0012] Based on the tire of the third or fourth aspect of the technology of the present disclosure, the conductive rubber is disposed across a plurality of the plurality of structural parts.

[0013] Based on the tire of the third or fourth aspect of the technology of the present disclosure, the conductive rubber is provided on one of the plurality of structural parts.

[0014] Based on the tire of any one of the first to sixth aspects of the technology of the present disclosure, at least a part of the conductive rubber is provided on the inner surface of the tire.

[0015] Based on the tire of any one of the first to sixth aspects of the technology of the present disclosure, an airtight layer is provided on the inner surface of the tire, and at least a part of the conductive rubber is provided on the airtight layer.

[0016] Based on the tire of any one of the first to eighth aspects of the technology of the present disclosure, the conductive rubber has an axial portion extending in the axial direction of the tire.

[0017] Based on the tire of any one of the first to ninth aspects of the technology of the present disclosure, the conductive rubber has a radial portion extending in the radial direction of the tire.

[0018] Based on the tire of any one of the first to tenth aspects of the technology of the present disclosure, the conductive rubber has a circumferential portion extending in the circumferential direction of the tire.

[0019] Based on the tire of any one of the first to eleventh aspects of the technology of the present disclosure, the conductive rubber is formed in a ring shape in the circumferential direction of the tire.

[0020] Based on the tire of any one of the first to twelfth aspects of the technology of the present disclosure, the conductive rubber is formed in a sheet shape.

[0021] Based on the tire of any one of the first to thirteenth aspects of the technology of the present disclosure, the tire includes a plurality of conductive rubbers.

[0022] Based on the tire of the 14th aspect of the technology of the present disclosure, the tire further includes a connecting member that electrically connects a plurality of conductive rubbers.

[0023] Based on the tire of the 14th aspect of the technology of the present disclosure, in the 16th aspect of the technology of the present disclosure, a plurality of conductive rubbers are arranged separately from each other in at least one of the axial direction and the circumferential direction of the tire.

[0024] The 17th aspect of the technology of the present disclosure is a tire and rim assembly, which includes: a tire according to any one of the 1st to 16th aspects; and a rim.

[0025] Based on the tire and rim assembly of the 17th aspect of the technology of the present disclosure, in the 18th aspect of the technology of the present disclosure, the rim has a conductive portion that contacts the contact portion.

[0026] Based on the tire and rim assembly of the 18th aspect of the technology of the present disclosure, in the 19th aspect of the technology of the present disclosure, the contact portion is provided at the bead portion, and the conductive portion is provided at the rim seat portion.

[0027] Based on the tire and rim assembly of any one of the 17th to 19th aspects of the technology of the present disclosure, in the 20th aspect of the technology of the present disclosure, the tire and rim assembly further includes an output device that is electrically connected to the conductive rubber.

[0028] Effects of the Invention

[0029] According to the technology of the present disclosure, as an example, the strain detected by the conductive rubber can be output to the outside. Brief Description of the Drawings

[0030] Figure 1 It is a perspective view schematically showing the tire and rim assembly of the present embodiment.

[0031] Figure 2 It is a cross-sectional view showing a half portion of the tire and rim assembly of the present embodiment divided from the equatorial plane.

[0032] Figure 3 It is a block diagram showing the inference system of the present embodiment.

[0033] Figure 4 It is a block diagram showing the functional structure of the inference device of the present embodiment.

[0034] Figure 5 It is a flowchart showing the process flow of the inference process of the present embodiment.

[0035] Figure 6 It is a block diagram showing the functional structure of the learning device of the present embodiment.

[0036] Figure 7It is an explanatory diagram showing the state of the learning process of the present embodiment.

[0037] Figure 8 It is a flowchart showing the process of the learning process of the present embodiment.

[0038] Figure 9 It is a block diagram showing the hardware configuration of the inference device of the present embodiment.

[0039] Figure 10 It is a perspective view showing the first modification related to the strain detection body of the present embodiment.

[0040] Figure 11 It is a perspective view showing the second modification related to the strain detection body of the present embodiment.

[0041] Figure 12 It is a perspective view showing the third modification related to the strain detection body of the present embodiment.

[0042] Figure 13 It is a perspective view showing the fourth modification related to the strain detection body of the present embodiment.

[0043] Figure 14 It is a perspective view showing the fifth modification related to the strain detection body of the present embodiment.

[0044] Figure 15 It is a perspective view showing the sixth modification related to the strain detection body of the present embodiment.

[0045] Figure 16 It is a perspective view showing the seventh modification related to the tire - rim assembly of the present embodiment.

[0046] Figure 17 It is a perspective view showing the tire - rim assembly of the first reference example.

[0047] Figure 18 It is a perspective view showing the tire - rim assembly of the second reference example.

[0048] Figure 19 It is a chart showing the inference result of the example.

[0049] Figure 20 It is a cross - sectional view showing an example in which an RF tag is provided on the tire of the present embodiment. Detailed implementation mode

[0050] Hereinafter, an embodiment of the technology of the present disclosure will be described with reference to the drawings.

[0051] In Figure 1FIG. 0 schematically shows a tire - rim assembly 10 of the present embodiment. The tire - rim assembly 10 includes a tire 12 and a rim 14. The tire 12 is mounted on the rim 14. The tire 12 can be a tire for any vehicle.

[0052] The tire 12 includes a plurality of first conductive rubbers 16A and a plurality of second conductive rubbers 16B. The number of the plurality of first conductive rubbers 16A can be any number. Similarly, the number of the plurality of second conductive rubbers 16B can be any number. In Figure 1 the example shown, as the plurality of first conductive rubbers 16A, a pair of first conductive rubbers 16A is used, and as the plurality of second conductive rubbers 16B, a pair of second conductive rubbers 16B is used.

[0053] Both the first conductive rubber 16A and the second conductive rubber 16B have conductivity by containing conductive particles. As the first conductive rubber 16A and the second conductive rubber 16B, for example, a rubber composition for strain detection described in Japanese Patent Application Laid - Open No. 2006 - 208052 can be applied.

[0054] A pair of first conductive rubbers 16A are arranged to be separated from each other in the axial direction of the tire 12 across the equatorial plane 18 of the tire 12. A first connecting member 20A extending in the axial direction of the tire 12 is provided between the pair of first conductive rubbers 16A, and the first connecting member 20A electrically connects the ends on the equatorial plane 18 side of the pair of first conductive rubbers 16A to each other. The first connecting member 20A can be a wiring or a conductive rubber.

[0055] A pair of second conductive rubbers 16B are arranged to be separated from each other in the axial direction of the tire 12 across the equatorial plane 18 of the tire 12 and are also separated from each other in the circumferential direction of the tire 12. A second connecting member 20B extending in the circumferential direction of the tire 12 is provided between the pair of second conductive rubbers 16B, and the second connecting member 20B electrically connects the ends on the equatorial plane 18 side of the pair of second conductive rubbers 16B to each other. The second connecting member 20B can be a wiring or a conductive rubber.

[0056] A first strain detection body 22A for detecting the strain of the tire 12 is formed by a pair of first conductive rubbers 16A and the first connecting member 20A. Similarly, a second strain detection body 22B for detecting the strain of the tire 12 is formed by a pair of second conductive rubbers 16B and the second connecting member 20B.

[0057] Hereinafter, when it is not necessary to distinguish between the first conductive rubber 16A and the second conductive rubber 16B, the first conductive rubber 16A and the second conductive rubber 16B are referred to as "conductive rubber 16". In addition, when it is not necessary to distinguish between the first connecting member 20A and the second connecting member 20B, the first connecting member 20A and the second connecting member 20B are referred to as "connecting member 20". In addition, when it is not necessary to distinguish between the first strain detection body 22A and the second strain detection body 22B, the first strain detection body 22A and the second strain detection body 22B are referred to as "strain detection body 22".

[0058] In Figure 1 In the example shown, two strain detection bodies 22 are provided in the tire 12, but the number of strain detection bodies 22 provided in the tire 12 can be any number. In addition, the strain detection body 22 includes the connecting member 20, but may not include the connecting member 20. In addition, the strain detection body 22 may be composed only of the conductive rubber 16, or may further include members other than the conductive rubber 16 and the connecting member 20 on the basis of having the conductive rubber 16. In addition, the number of conductive rubbers 16 included in the strain detection body 22 can be any number.

[0059] When the strain of the conductive rubber 16 changes corresponding to the state of the traveling tire 12, the electrical characteristics of the conductive rubber 16 change. The electrical characteristics of the conductive rubber 16 include, for example, the resistance of the conductive rubber 16. By measuring the electrical characteristics of the strain detection body 22 including the conductive rubber 16, the strain of the tire 12 can be detected.

[0060] In Figure 2 shows a half part of the tire rim assembly 10 of the present embodiment divided from the equatorial plane 18. The tire 12 has a plurality of structural parts. Specifically, the tire 12 includes a tread portion 24, a shoulder portion 26, a sidewall portion 28, and a bead portion 30 as an example of a plurality of structural parts.

[0061] An airtight layer 32 is provided on the inner surface 12A of the tire 12. The airtight layer 32 is provided on the inner surfaces of the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30, which are examples of the inner surface 12A of the tire 12. The airtight layer 32 is provided in a ring shape in the circumferential direction of the tire 12.

[0062] The rim 14 has a bead seat portion 34 and a flange portion 36. The bead portion 30 is assembled to the bead seat portion 34. The flange portion 36 is continuous with the bead seat portion 34 and is located outside the bead portion 30.

[0063] Figure 2 The conductive rubber 16 shown is the same as the above-mentioned pair of first conductive rubbers 16A and a pair of second conductive rubbers 16B (both refer to Figure 1)Correspond respectively. The conductive rubber 16 is disposed across the tread face 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30 of the tire.

[0064] As an example, the conductive rubber 16 has an axial portion 38, a radial portion 40, and a contact portion 42. The axial portion 38 and the radial portion 40 are part of the conductive rubber 16, and the contact portion 42 is another part of the conductive rubber 16. The axial portion 38 is a portion extending along the axial direction of the tire 12 and is disposed on the tread face 24. The radial portion 40 is a portion extending along the radial direction of the tire 12 and is disposed across the shoulder portion 26, the sidewall portion 28, and the bead portion 30.

[0065] As an example, the conductive rubber 16 is formed in a sheet shape. By forming the conductive rubber 16 in a sheet shape, the axial portion 38 extends along the axial and circumferential directions of the tire 12, and the radial portion 40 extends along the radial and circumferential directions of the tire 12.

[0066] As an example, the axial portion 38 and the radial portion 40 are disposed on the inner surface 12A of the tire 12. Specifically, the axial portion 38 and the radial portion 40 are disposed on the airtight layer 32 which is an example of the inner surface 12A of the tire 12. The conductive rubber 16 can constitute at least a part of the airtight layer 32 or can be an independent member outside the airtight layer 32.

[0067] In addition, the conductive rubber 16 can be formed flush with the airtight layer 32 or can overlap at least one of the front and back surfaces of the airtight layer 32. In addition, the tire 12 can be manufactured by vulcanization in a state where the conductive rubber 16 is adhered to the airtight layer 32 of the green tire.

[0068] The contact portion 42 is disposed at a position in contact with the rim 14. Specifically, the contact portion 42 is disposed at the bead portion 30 which is an example of the position in contact with the rim 14. More specifically, the contact portion 42 is disposed on the opposite surface 30A of the bead portion 30 that is opposite to the bead seat portion 34. The contact portion 42 extends from the radial portion 40 along the opposite surface 30A from the inner side to the outer side of the tire 12.

[0069] The rim 14 has a plurality of conductive portions 44. One conductive portion 44 of the plurality of conductive portions 44 is shown in Figure 2 , but the conductive portions 44 are respectively provided at positions on the rim 14 corresponding to the respective conductive rubbers 16. As an example, the conductive portions 44 are provided in a partial circumferential direction of the rim 14.

[0070] The conductive portion 44 has electrical conductivity. The conductive portion 44 may also be formed by a locally exposed area of the film covering the surface of the rim 14 with electrical conductivity (i.e., a local area of the surface of the rim 14). In addition, the conductive portion 44 may also be a member provided in the exposed area of the surface of the rim 14 (i.e., a member other than the rim 14). In addition, when the conductive portion 44 is formed by a member other than the rim 14, the conductive portion 44 may be made of metal or resin. In addition, the conductive portion 44 may also be sheet-shaped.

[0071] The conductive portion 44 is provided at a position in contact with the contact portion 42. Specifically, the conductive portion 44 is provided at the bead seat portion 34, which is an example of a position in contact with the contact portion 42. More specifically, the conductive portion 44 is provided on the opposing surface 34A of the bead seat portion 34 that faces the bead portion 30. The conductive portion 44 is in close contact with the contact portion 42 by being provided on the opposing surface 34A.

[0072] In Figure 3 is shown the inference system S of the present embodiment. The inference system S is a system that infers physical quantities related to the traveling tire 12 based on the electrical characteristics of a plurality of strain detectors 22. The inference system S includes a tire-rim assembly 10 and an inference device 50. The inference system S can be applied to any vehicle.

[0073] The tire-rim assembly 10 includes an output device 52. The output device 52 can be mounted on the tire 12 or on the rim 14. The output device 52 can also be incorporated into, for example, a tire pressure monitoring system (TPMS: Tire Pressure Monitoring System). The output device 52 is electrically connected to a plurality of strain detectors 22. Specifically, the output device 52 is electrically connected to each conductive rubber 16 by means of the conductive portion 44 (see Figure 2 ).

[0074] The conductive portion 44 can be electrically connected to the output device 52 by means of wiring (not shown) or can be electrically connected to the output device 52 by means of the rim 14. In addition, when the conductive portion 44 is electrically connected to the output device 52 by means of the rim 14, the output device 52 can also be electrically connected to the rim 14 by being mounted on the rim 14 by means of screws or the like (not shown).

[0075] In Figure 3 In the example shown, two strain detectors 22 are provided on the tire 12, but the number of strain detectors 22 provided on the tire 12 can be any number. Hereinafter, an example in which two strain detectors 22 are provided on the tire 12 will be described.

[0076] The output device 52 is a device having a circuit (not shown), and the circuit outputs a first detection signal corresponding to the electrical characteristics of the first strain detection body 22A including a pair of first conductive rubbers 16A and a second detection signal corresponding to the electrical characteristics of the second strain detection body 22B including a pair of second conductive rubbers 16B. Hereinafter, when explaining without distinguishing between the first detection signal and the second detection signal, the first detection signal and the second detection signal are referred to as "detection signals".

[0077] The output device 52 and the inference device 50 each have a communication circuit (not shown) and are connected in such a way that they can communicate with each other through the communication circuit. The communication circuit can be a circuit that communicates in a wired manner or a circuit that communicates in a wireless manner. As an example, Figure 3 shows an example in which the communication circuit is a circuit that communicates in a wireless manner.

[0078] In Figure 4 shows the functional structure of the inference device 50 of the present embodiment. The inference device 50 performs inference processing. The inference device 50 includes an inference unit 54. The inference processing is implemented by the inference unit 54.

[0079] As an example, the electrical characteristics of the first strain detection body 22A are input to the inference unit 54 as the first input data 56, and the electrical characteristics of the second strain detection body 22B are input as the second input data 58. The inference unit 54 uses the learned learning model 60 that has undergone deep learning to infer a physical quantity related to the tire 12 to be inferred (that is, the unknown tire 12 as the target tire), and outputs the inferred physical quantity as the output data 62.

[0080] The electrical characteristics of the strain detection body 22 include, for example, the resistance of the strain detection body 22. The electrical characteristics of the strain detection body 22 may also include electrical characteristics other than the resistance of the strain detection body 22. As electrical characteristics other than resistance, for example, impedance or capacitance can be cited. Hereinafter, as an example of the electrical characteristics of the strain detection body 22, the resistance of the strain detection body 22 will be described. In addition, for convenience, it is assumed that the electrical characteristics of the strain detection body 22 are the same as the electrical characteristics of the conductive rubber 16 included in the strain detection body 22. Similarly, it is assumed that the resistance of the strain detection body 22 is the same as the resistance of the conductive rubber 16 included in the strain detection body 22.

[0081] In Figure 4In the example shown, the electrical characteristics of the strain detection body 22 are input to the inference unit 54. However, on the basis of the electrical characteristics of the strain detection body 22, measurement values, detection values, etc. related to the tire 12 may also be input to the inference unit 54. In addition, on the basis of the electrical characteristics of the strain detection body 22, measurement values, detection values, etc. related to the vehicle on which the tire 12 is mounted may also be input to the inference unit 54. In addition, on the basis of the resistance of the strain detection body 22, electrical characteristics other than the resistance of the strain detection body 22 may also be input to the inference unit 54.

[0082] Physical quantities related to the tire 12 include, for example, the slip angle of the tire 12, the camber angle of the tire 12, the rotational speed of the tire 12, the load applied to the tire 12, and the lateral force acting on the tire 12. The physical quantities related to the tire 12 may be only the slip angle, the camber angle, the rotational speed, the load, and the lateral force, or may be one or more of the slip angle, the camber angle, the rotational speed, the load, and the lateral force.

[0083] In addition, the physical quantities related to the tire 12 may also include other physical quantities related to the tire 12 on the basis of including the slip angle, the camber angle, the rotational speed, the load, and the lateral force. And, as long as the physical quantities related to the tire 12 are physical quantities related to the running of the tire 12, they may also be physical quantities other than the above physical quantities. In addition, the inference unit 54 may also infer other physical quantities (for example, physical quantities related to the vehicle) on the basis of inferring the physical quantities related to the tire 12.

[0084] The learning model 60 is a model that has completed learning to derive physical quantities related to the tire 12 from the electrical characteristics of the first strain detection body 22A and the electrical characteristics of the second strain detection body 22B. The learning model 60 is, for example, a model that defines a learned neural network, and is a set of information on the weights (i.e., strengths) of the connections between the nodes (i.e., neurons) that make up the neural network.

[0085] In addition, as a technique applied to the inference process using the learning model 60, for example, the technique described in International Publication Pamphlet No. 2021 / 124992 can be applied.

[0086] In Figure 5 shows the flow of the inference process of the present embodiment. The inference method realized by the inference process is an example of the "inference method" of the technology of the present disclosure. First, in step ST10, the inference unit 54 acquires the learning model 60 stored in the inference device 50.

[0087] Next, in step ST12, the inference unit 54 acquires the first input data 56 and the second input data 58 from the unknown tire 12 that is the inference object.

[0088] Next, in step ST14, the inference unit 54 uses the learning model 60 obtained in step ST10 to infer the output data 62 corresponding to the first input data 56 and the second input data 58 obtained in step ST12. Thereby, a physical quantity related to the tire 12 corresponding to the electrical characteristics of the first strain detection body 22A and the electrical characteristics of the second strain detection body 22B is inferred.

[0089] FIG. Figure 6 shows a functional structure of the learning device 70 of the present embodiment. The learning device 70 is a device that causes the learning model 60 to learn. The learning device 70 can be implemented by the inference device 50 or can be a device other than the inference device 50. When the learning device 70 is a device other than the inference device 50, the learned learning model 60 that has been learned by the learning device 70 is provided from the learning device 70 to the inference device 50.

[0090] The learning device 70 executes a learning process. The learning device 70 includes a learning unit 72. The learning process is implemented by the learning unit 72.

[0091] The learning model 60 is generated through the learning process. The learning model 60 is generated based on learning data 74 (i.e., training data) obtained from tires 12 traveling under various different conditions. The learning data 74 is data that largely includes sets of first input data 56 representing the electrical characteristics of the first strain detection body 22A, second input data 58 representing the electrical characteristics of the second strain detection body 22B, and output data 62 representing physical quantities related to the tire 12.

[0092] FIG. Figure 7 shows a state of the learning process of the present embodiment. The learning unit 72 holds in large quantities sets of first input data 56 representing the electrical characteristics of the first strain detection body 22A, second input data 58 representing the electrical characteristics of the second strain detection body 22B, and output data 62 representing physical quantities related to the tire 12 as the learning data 74.

[0093] The learning unit 72 includes a generator 76 and an arithmetic unit 78. The generator 76 includes an input layer 76A, an intermediate layer 76B, and an output layer 76C, and constitutes a known recurrent neural network, for example, a recurrent neural network (RNN: Recurrent Neural Network).

[0094] Since the recurrent neural network itself is a known technique, a detailed description thereof is omitted. The intermediate layer 76B includes many node groups (i.e., neuron groups) having inter-node connections and feedback connections. Data from the input layer 76A is input to the intermediate layer 76B, and data representing the operation result of the intermediate layer 76B is output to the output layer 76C.

[0095] Specifically, the generator 76 is a neural network that generates generated output data 64 representing a physical quantity related to the tire 12 based on the first input data 56 and the second input data 58. The generated output data 64 is data obtained by inferring a physical quantity related to the tire 12 based on the first input data 56 and the second input data 58.

[0096] The generator 76 generates generated output data 64 representing a physical quantity related to the tire 12 based on the first input data 56 and the second input data 58. The generator 76 learns by using a large amount of the first input data 56 and the second input data 58, so that it can generate generated output data 64 close to the measured value of the physical quantity related to the tire 12.

[0097] The arithmetic unit 78 is an arithmetic unit 78 that compares the generated output data 64 and the output data 62 and calculates the error of the comparison result. The generated output data 64 and the output data 62 are input to the arithmetic unit 78. The arithmetic unit 78 calculates the error between the generated output data 64 and the output data 62 and outputs data representing the calculation result.

[0098] The learning unit 72 performs learning of the generator 76 to adjust the weight parameters of the connections between nodes based on the error calculated by the arithmetic unit 78. Specifically, the arithmetic unit 78 feeds back to the generator 76 the weight parameters of the connections between the nodes of the input layer 76A and the intermediate layer 76B, the weight parameters of the connections between the nodes within the intermediate layer 76B, and the weight parameters of the connections between the intermediate layer 76B and the output layer 76C of the generator 76 by using methods such as the gradient descent method and the error backpropagation method.

[0099] Thus, taking the output data 62 of the learning data 74 as the target, the connections between all nodes are optimized in such a way that the error between the generated output data 64 and the output data 62 is minimized. The learning model 60 represents a set of information on the weight parameters (i.e., weights or strengths) of the connections between nodes that are the learning results of the learning unit 72.

[0100] In addition, in Figure 7 the example shown, a recurrent neural network is used, but the technology of the present disclosure is not limited to using a recurrent neural network, and other methods can also be used.

[0101] In Figure 8 the flow of the learning process of the present embodiment is shown. The learning method implemented through the learning process is an example of the "learning method" of the technology of the present disclosure. First, in step ST20, the learning unit 72 acquires the first input data 56, the second input data 58, and the output data 62 as the learning data 74.

[0102] Next, in step ST22, the learning unit 72 generates a learning model 60 using the learning data 74. That is, a set of information on the weight parameters of the combination between nodes, which is the learning result obtained by learning using a large amount of learning data 74 as described above, is obtained.

[0103] Next, in step ST24, the learning unit 72 stores, as the learning model 60, data that is a set of information on the weight parameters (i.e., weights or strengths) of the combination between nodes that represents the learning result in the learning device 70.

[0104] In Figure 9 FIG. shows the hardware configuration of the inference device 50 of the present embodiment. The inference device 50 includes a computer 80. The computer 80 includes a CPU 82, a RAM 84, a ROM 86, an auxiliary storage device 88, and an input / output I / F (Interface) 90. The auxiliary storage device 88 is constituted by, for example, a hard disk device or the like. The CPU 82 constitutes a processor, and the RAM 84 and the ROM 86 constitute a memory.

[0105] The control unit is constituted by the CPU 82, the RAM 84, the ROM 86, the auxiliary storage device 88, and the input / output I / F 90. The control unit can be constituted as a sub-control unit that controls a part of the operation of the inference device 50, or can be constituted as a part of the main control unit that controls the overall operation of the inference device 50.

[0106] Part or all of the respective modules of the control unit can be formed by using an integrated circuit such as an LSI (Large Scale Integration) or an IC (Integrated Circuit) chipset, for example. In addition, the above-mentioned respective modules can use separate circuits, or can use a circuit formed by integrating a part or all of them. In addition, the above-mentioned respective modules can be provided integrally with each other, or a part of the modules can be separately provided. In addition, a part of each of the above-mentioned modules can be separately provided. For the integration of the control unit, it is not limited to LSI, and a dedicated circuit or a general-purpose processor can also be used.

[0107] The CPU 82, the RAM 84, the ROM 86, the auxiliary storage device 88, and the input / output I / F 90 are connected via a bus 92 so as to be able to transmit and receive data and commands to and from each other. In addition, the inference device 50 includes a communication I / F 94 and an operation display unit 96. The communication I / F 94 and the operation display unit 96 are connected to the input / output I / F 90. The operation display unit 96 includes, for example, a display, a keyboard, a mouse, or a touch panel display.

[0108] The communication I / F 94 functions as an input / output unit that inputs / outputs at least one of the first input data 56, the second input data 58, and the output data 62 between the external device (not shown). Further, when the learning device 70 is a device other than the inference device 50, the communication I / F 94 functions as an input / output unit that inputs / outputs the learning model 60 between the learning device 70.

[0109] The control program 98 is stored in the auxiliary storage device 88. The control program 98 is an example of the "program" of the technology of the present disclosure. The CPU 82 reads the control program 98 from the auxiliary storage device 88 and loads it into the RAM 84 to execute various processes. The learning model 60 and various data 100 are stored in the auxiliary storage device 88.

[0110] In the inference device 50, the CPU 82 functions as an inference unit 54 by executing the control program 98 (refer to Figure 4 ). Further, when the inference device 50 also serves as the learning device 70, the CPU 82 functions as a learning unit 72 by executing the control program 98 (refer to Figure 6 ).

[0111] In addition, when the learning device 70 (refer to Figure 6 ) is a device other than the inference device 50, the learning device 70 is implemented by, for example, the same hardware structure as the inference device 50.

[0112] Next, the effects of the present embodiment will be described.

[0113] The tire 12 of the present embodiment includes at least the conductive rubber 16, and the conductive rubber 16 has a contact portion 42 provided at a position in contact with the rim 14. Thus, for example, by electrically connecting the contact portion 42 and the output device 52, the strain detected by the conductive rubber 16 can be output to the outside by the output device 52. That is, a detection signal corresponding to the strain of the tire 12 can be output from the output device 52.

[0114] In addition, the rim 14 has a conductive portion 44 in contact with the contact portion 42. Thus, for example, even if the contact portion 42 and the output device 52 are not directly connected, by connecting the conductive portion 44 and the output device 52, the conductive rubber 16 and the output device 52 can be electrically connected.

[0115] In addition, the contact portion 42 is provided in the bead portion 30, and the conductive portion 44 is provided in the seat portion 34. Thus, by mounting the tire 12 on the rim 14, the contact portion 42 can be brought into contact with the conductive portion 44. Thereby, compared with the case where a connection operation for electrically connecting the conductive rubber 16 and the output device 52 is required in addition to mounting the tire 12 on the rim 14, the assembly operation of the tire-rim assembly 10 can be simplified.

[0116] In addition, since the contact portion 42 is provided in the bead portion 30, for example, when the tire 12 is mounted on the rim 14, the contact portion 42 can be pressed against the bead seat portion 34. Thereby, the contact resistance between the contact portion 42 and the conductive portion 44 can be reduced.

[0117] In addition, the tire 12 includes, as an example of a plurality of structural parts, a tread portion 24, a shoulder portion 26, a sidewall portion 28, and a bead portion 30, and the conductive rubber 16 is disposed across the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30. Therefore, the strain in the region across the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30 can be detected.

[0118] In addition, since the conductive rubber 16 is disposed across the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30, for example, compared with the case where the conductive rubber 16 is provided only in one of the structural parts of the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30, the strain in a larger region can be detected.

[0119] In addition, the conductive rubber 16 has an axial portion 38 and a radial portion 40, and the axial portion 38 and the radial portion 40 are provided on the inner surface 12A of the tire 12. Therefore, contact between the axial portion 38 and the radial portion 40 and an object outside the tire 12 can be suppressed. In addition, for example, compared with the case where the conductive rubber 16 is provided inside the rubber material of the tire 12 (that is, the case where the conductive rubber 16 is embedded in the rubber material), the tire 12 can be easily manufactured.

[0120] In addition, an airtight layer 32 is provided on the inner surface 12A of the tire 12, and the axial portion 38 and the circumferential portion 46 are provided on the airtight layer 32. Therefore, for example, by integrally forming the conductive rubber 16 on the airtight layer 32, or pasting the conductive rubber 16 on the airtight layer 32, etc., the conductive rubber 16 can be mounted on the tire 12.

[0121] In addition, the conductive rubber 16 has an axial portion 38 extending along the axial direction of the tire 12. Therefore, a detection signal corresponding to the strain in the axial direction of the tire 12 can be output from the output device 52.

[0122] In addition, the conductive rubber 16 has a radial portion 40 extending along the radial direction of the tire 12. Therefore, a detection signal corresponding to the strain in the radial direction of the tire 12 can be output from the output device 52.

[0123] In addition, the conductive rubber 16 is formed in a sheet shape. Therefore, a detection signal corresponding to the strain in the direction in which the conductive rubber 16 extends can be output from the output device 52.

[0124] In addition, the tire 12 includes a plurality of conductive rubbers 16. Therefore, a detection signal corresponding to the strain detected in a plurality of regions corresponding to the plurality of conductive rubbers 16 can be output from the output device 52.

[0125] In addition, a pair of first conductive rubbers 16A among the plurality of conductive rubbers 16 are arranged to be separated from each other in the axial direction of the tire 12, and the pair of first conductive rubbers 16A are electrically connected by a first connection member 20A. Therefore, even if the pair of first conductive rubbers 16A are arranged to be separated from each other in the axial direction of the tire 12, a first strain detection body 22A can be formed by the pair of first conductive rubbers 16A and the first connection member 20A.

[0126] In addition, by forming the first strain detection body 22A, a first detection signal corresponding to the strain detected in the region corresponding to the pair of first conductive rubbers 16A (that is, the regions separated from each other in the axial direction of the tire 12) can be output from the output device 52.

[0127] In addition, a pair of second conductive rubbers 16B among the plurality of conductive rubbers 16 are arranged to be separated from each other in the axial and circumferential directions of the tire 12, and the pair of second conductive rubbers 16B are electrically connected by a second connection member 20B. Therefore, even if the pair of second conductive rubbers 16B are arranged to be separated from each other in the axial and circumferential directions of the tire 12, a second strain detection body 22B can be formed by the pair of second conductive rubbers 16B and the second connection member 20B.

[0128] In addition, by forming the second strain detection body 22B, a second detection signal corresponding to the strain detected in the region corresponding to the pair of second conductive rubbers 16B (that is, the regions separated from each other in the axial and circumferential directions of the tire 12) can be output from the output device 52.

[0129] In addition, the inference device 50 includes an inference unit 54. The inference unit 54 uses the electrical characteristics of the conductive rubbers 16 provided on the tire 12 and physical quantities related to the tire 12 as learning data 74. Moreover, the inference unit 54 inputs the electrical characteristics obtained from the tire 12 as the inference object into a learning model 60 that has been learned to input the electrical characteristics of the conductive rubbers 16 and output physical quantities related to the tire 12, and infers physical quantities related to the tire 12. Therefore, even if the physical quantities related to the tire 12 as the inference object are not directly measured, the physical quantities related to the tire 12 can be inferred.

[0130] In addition, the inference unit 54 infers a physical quantity related to the tire 12 based on the resistance of the conductive rubber 16, which is an example of the electrical characteristics of the conductive rubber 16. Therefore, by using the resistance that has a correlation with the physical quantity regarding the tire 12, it is possible to infer the physical quantity related to the tire 12 with high precision as compared to, for example, the case of using an input value that has no correlation with the physical quantity regarding the tire 12.

[0131] In addition, the inference unit 54 infers, as an example of the physical quantity related to the tire 12, the slip angle, camber angle, rotational speed, load, and lateral force of the tire 12. Therefore, even without directly measuring the slip angle, camber angle, rotational speed, load, and lateral force of the tire 12, it is possible to infer the slip angle, camber angle, rotational speed, load, and lateral force.

[0132] Next, a modified example of the present embodiment will be described.

[0133] In Figures 10 to 13 the first to fourth modified examples related to the strain detection body 22 are shown. As in Figure 10 and Figure 11 shown, a pair of conductive rubbers 16 included in the strain detection body 22 are separated in the circumferential direction of the tire 12.

[0134] In addition, as in Figure 10 shown, a connection member 20 may be provided between the pair of conductive rubbers 16 to connect the ends on the equatorial plane 18 side of the pair of conductive rubbers 16 to each other. As in Figure 11 shown, the connection member 20 may be provided along the circumferential direction of the tire 12 around the pair of conductive rubbers 16 to connect the ends on the equatorial plane 18 side of the pair of conductive rubbers 16 to each other.

[0135] In addition, as in Figure 12 and Figure 13 shown, the strain detection body 22 may include a plurality of connection members 20. Among the plurality of connection members 20, there may be included a plurality of connection members 21A that extend in the circumferential direction of the tire 12 and connect the pair of conductive rubbers 16, and a connection member 21B that extends in the axial direction of the tire 12 and connects the plurality of connection members 21A.

[0136] In addition, as in Figure 13 shown, one of the pair of conductive rubbers 16 included in the strain detection body 22 may have a structure in which the axial portion 38 (see Figure 2 ) is omitted.

[0137] In Figure 14 the fifth modified example related to the strain detection body 22 is shown. As in Figure 14As shown, the conductive rubber 16 has a circumferential portion 46 extending in the circumferential direction of the tire 12. The circumferential portion 46 can be formed in any part of the conductive rubber 16. In addition, the connecting member 20 can also connect the circumferential portions 46 to each other. If the conductive rubber 16 has the circumferential portion 46 like this, a detection signal corresponding to the strain in the circumferential direction of the tire 12 can be output from the output device 52.

[0138] In Figure 15 is shown a sixth modification related to the strain detection body 22. It can also be as Figure 15 shown, the strain detection body 22 has a conductive rubber 16 formed in a ring shape in the circumferential direction of the tire 12. Even if the conductive rubber 16 is formed in a ring shape in the circumferential direction like this, a detection signal corresponding to the strain in the circumferential direction of the tire 12 can be output from the output device 52.

[0139] In addition, it can also be as Figure 15 shown, the rim 14 has a plurality of conductive portions 44. The number of the plurality of conductive portions 44 can be any number. The plurality of conductive portions 44 can be arranged separately in at least one of the axial direction and the circumferential direction of the tire 12. Each conductive portion 44 is electrically connected to the conductive rubber 16 and the output device 52.

[0140] In the sixth modification, the plurality of conductive portions 44 includes a pair of first conductive portions 44A arranged separately from each other in the axial direction of the tire 12 and a pair of second conductive portions 44B arranged separately from each other in the axial direction of the tire 12. The pair of first conductive portions 44A and the pair of second conductive portions 44B are arranged separately in the circumferential direction of the tire 12.

[0141] The output device 52 outputs a first detection signal corresponding to the electrical characteristics of the region between the pair of first conductive portions 44A of the tire 12 and a second detection signal corresponding to the electrical characteristics of the region between the pair of second conductive portions 44B of the tire 12. If the rim 14 has a plurality of conductive portions 44 with respect to one conductive rubber 16 like this, the strain in the region between the conductive portions 44 of the tire 12 can be detected.

[0142] In addition, in the above-described embodiment, the conductive rubber 16 is provided across the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30, but the conductive rubber 16 may not be provided in a certain structural part among the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30. In addition, it can also be that, in addition to having the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30, the tire 12 further has other structural parts, and at least a part of the conductive rubber 16 is provided in the other structural parts.

[0143] In addition, the conductive rubber 16 may be provided only in one structural portion among the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30. In addition, the tire 12 may include other structural portions in addition to the tread portion 24, the shoulder portion 26, the sidewall portion 28, and the bead portion 30, and the conductive rubber 16 may be provided only in the other structural portions. If the conductive rubber 16 is provided only in one structural portion in this way, the structure of the tire 12 can be simplified compared to the case where the conductive rubber 16 is provided across a plurality of structural portions.

[0144] Furthermore, in the above-described embodiment, the contact portion 42 is provided at the bead portion 30 , but may be provided at a position other than the bead portion 30 as long as it is a position in contact with the rim 14 .

[0145] Furthermore, in the above-described embodiment, the axial portion 38 and the radial portion 40 of the conductive rubber 16 are provided on the inner surface 12A of the tire 12, but the conductive rubber 16 may have a portion provided on the inner surface 12A of the tire 12 in addition to the axial portion 38 and the radial portion 40. Furthermore, the portion of the conductive rubber 16 provided on the inner surface 12A of the tire 12 may be in any form. Furthermore, the conductive rubber 16 may be provided entirely on the inner surface 12A of the tire 12.

[0146] Furthermore, in the above-described embodiment, the axial portion 38 and the radial portion 40 of the conductive rubber 16 are provided in the airtight layer 32, but the conductive rubber 16 may have a portion provided in the airtight layer 32 in addition to the axial portion 38 and the radial portion 40. Furthermore, the portion of the conductive rubber 16 provided in the airtight layer 32 may be in any form. Furthermore, the conductive rubber 16 may be provided entirely in the airtight layer 32.

[0147] Furthermore, the conductive rubber 16 may have a structure having only the axial portion 38, a structure having only the radial portion 40, or a structure having only the circumferential portion 46. Furthermore, the conductive rubber 16 may have a structure having at least any one of the axial portion 38, the radial portion 40, and the circumferential portion 46. The conductive rubber 16 may have a structure having a portion other than the axial portion 38, the radial portion 40, and the circumferential portion 46.

[0148] Furthermore, the shapes of the plurality of conductive rubbers 16 included in the tire 12 may be the same as or different from each other.

[0149] Furthermore, in the above-described embodiment, the conductive rubber 16 is formed in a sheet shape, but may be formed in a shape other than a sheet shape, such as a block shape, a rib shape, a convex shape, or a rail shape.

[0150] Furthermore, the tire 12 may include a plurality of conductive rubbers 16 or may include only one conductive rubber 16 .

[0151] Furthermore, when the tire 12 includes a plurality of conductive rubbers 16 , the plurality of conductive rubbers 16 may be disposed so as to be separated from each other in at least one of the axial direction and the circumferential direction of the tire 12 .

[0152] Furthermore, the structure of the conductive rubber 16 included in the strain detection body 22 may be other than the above-described structure. Furthermore, the structure of the strain detection body 22 may be other than the above-described structure.

[0153] Furthermore, in the above embodiment, the conductive portion 44 is described as being formed in a sheet shape when it is constituted by a member other than the rim 14 , but it may be formed in a shape other than the sheet shape, such as a block shape, a rib shape, a convex shape, or a rail shape.

[0154] Furthermore, although the conductive portion 44 is provided on the ring seat portion 34 , it may be provided at a position other than the ring seat portion 34 as long as it is a position in contact with the contact portion 42 .

[0155] exist Figure 16 , a seventh modification example related to the tire rim assembly 10 is shown. In the seventh modification example, the conductive portion 44 is provided across the rim seat portion 34 and the flange portion 36. In addition, the conductive portion 44 is electrically connected to the inference device 50 via the slip ring 102. The inference device 50 includes a circuit (omitted from the figure) that outputs a detection signal corresponding to the electrical characteristics of the strain detection body 22. Even with such a configuration, the inference device 50 can infer a physical quantity related to the tire 12 based on the electrical characteristics of the strain detection body 22.

[0156] exist Figure 17 2 shows an eighth modification example related to the tire-rim assembly 10 . In the eighth modification example, as an example, the conductive rubber 16 is formed in an annular shape in the circumferential direction of the tire 12 .

[0157] The tire 12 has a plurality of connection parts 104. The connection parts 104 are fixed to the conductive rubber 16. The connection parts 104 may be an adhesive material having conductivity, an adhesive member having conductivity and adhesiveness, or an electrode having conductivity. The connection parts 104 are electrically connected to the conductive rubber 16. The number of the plurality of connection parts 104 may be any. The plurality of connection parts 104 may be arranged separately in at least one direction of the axial direction and the circumferential direction of the tire 12. Each connection part 104 is electrically connected to the output device 52, for example, by means of a wiring 106.

[0158] In the eighth modification example, the plurality of connection portions 104 include a pair of first connection portions 104A arranged separately from each other in the axial direction of the tire 12 and a pair of second connection portions 104B arranged separately from each other in the axial direction of the tire 12. The pair of first connection portions 104A and the pair of second connection portions 104B are arranged separately from each other in the circumferential direction of the tire 12. In addition, the interval between the pair of first connection portions 104A is set wider than the interval between the pair of second connection portions 104B. Each connection portion 104 can be provided at any position of the tire 12.

[0159] The output device 52 outputs a first detection signal corresponding to the electrical characteristics of the region between the pair of first connection portions 104A of the tire 12 and a second detection signal corresponding to the electrical characteristics of the region between the pair of second connection portions 104B of the tire 12. Even when the rim 14 has a plurality of connection portions 104 with respect to one conductive rubber 16 in this way, it is possible to detect the strain in the region between the connection portions 104 of the tire 12.

[0160] In Figure 18 a ninth modification example related to the tire-rim assembly 10 is shown. The ninth modification example is a modification example of the eighth modification example. In the ninth modification example, the wiring 106 is led out from between the bead portion 30 and the rim seat portion 34 to the outside of the tire 12 and is connected to the slip ring 102. The connection portion 104 is electrically connected to the inference device 50 via the wiring 106 and the slip ring 102. Even with such a configuration, it is possible for the inference device 50 to infer a physical quantity related to the tire 12 based on the electrical characteristics of the strain detection body 22.

[0161] In addition, Figure 17 the eighth modification example shown in Figure 18 and the ninth modification example shown in

[0162] are reference examples of the technology of the present disclosure.

[0163] Next, an example of the present embodiment will be described.

[0164] As an example, this example is an example implemented using the Figure 17 inferred system S shown. In this example, the learning model 60 is learned using the learning data 74 obtained while the tire 12 is running on the flat belt. In addition, based on the electrical characteristics of the strain detection body 22 obtained from the tire 12 while the tire 12 to be inferred is running on the flat belt, the learned learning model 60 is used to infer a physical quantity related to the tire 12.

[0165] The number of strain detectors 22 is two, and the electrical property of the strain detector 22 input to the inference device 50 is the resistance of the strain detector 22. In addition, the physical quantities related to the tire 12 output from the inference device 50 are the sideslip angle, camber angle, rotational speed, load, and lateral force.

[0166] The driving conditions are as follows. That is, the driving speed of the tire 12 is set to 10 km / h, 30 km / h, and 60 km / h, and the load of the tire 12 is set to 3000 N, 5000 N, and 7000 N. In addition, the tire 12 is made to snake while setting the sideslip angle of the tire 12 to 0°, 3°, and 5°.

[0167] In Figure 19 shows the inference result of this embodiment. The curve G1 shown by the thick line represents the inferred value, and the curve G2 shown by the thin line represents the measured value. As Figure 19 shown in the inference result, in this embodiment, an inferred value corresponding to the measured value is obtained.

[0168] As Figure 20 shown, the tire 12 of this embodiment may include an RF tag 200 as a communication device. The RF tag 200 includes an IC chip and an antenna. The RF tag 200 is arranged, for example, at a position sandwiched between a plurality of members of the same type or different types that make up the tire. By doing so, it is easy to install the RF tag 200 when manufacturing the tire, and the productivity of the tire equipped with the RF tag 200 can be improved. In this example, the RF tag 200 is arranged, for example, sandwiched between the chafer strip and other members adjacent to the chafer strip.

[0169] The RF tag 200 may also be embedded in any one of the members that make up the tire. By doing so, compared with the case of being arranged at a position sandwiched between a plurality of members that make up the tire, the load applied to the RF tag 200 can be reduced. Thereby, the durability of the RF tag 200 can be improved. In this example, the RF tag 200 can be embedded in rubber members such as tread rubber and sidewall rubber, for example.

[0170] Preferably, the RF tag 200 is not arranged at a position that becomes the boundary of members with different stiffnesses in the circumferential length direction along the outer surface of the tire when the tire is viewed in cross-section in the tire width direction. By doing so, the RF tag 200 is not arranged at a position where strain is likely to concentrate due to the stiffness difference. Therefore, the load applied to the RF tag 200 can be reduced. Thereby, the durability of the RF tag 200 can be improved. In this example, preferably, the RF tag 200 is not arranged at a position that becomes the boundary between the end of the carcass and the member (such as sidewall rubber, etc.) adjacent to the end of the carcass when the tire is viewed in cross-section in the tire width direction, for example.

[0171] The number of RF tags 200 is not particularly limited. The tire may have only one RF tag 200, or may have two or more RF tags 200. Here, as an example of the communication device, the RF tag 200 is illustrated, but it may also be a communication device different from the RF tag 200.

[0172] The above describes the present embodiment, but the technology of the present disclosure is not limited to the above content. Needless to say, various modifications can be made without departing from the gist thereof.

[0173] All documents, patent applications, and technical standards described in this specification are incorporated herein by reference to the same extent as if each document, patent application, and technical standard were specifically and separately described. In addition, by reference, the entire disclosure of Japanese Patent Application No. 2022-185258 filed on November 18, 2022 is incorporated into this specification.

[0174] Next, the following supplementary notes are disclosed regarding the present embodiment.

[0175] (Supplementary Note 1)

[0176] For the tire according to the first aspect,

[0177] It further includes a plurality of connection portions that connect wirings to the conductive rubber.

[0178] (Supplementary Note 2)

[0179] For the tire according to the first aspect,

[0180] The plurality of connection portions are arranged separately in at least one of the axial direction and the circumferential direction of the tire.

[0181] (Supplementary Note 3)

[0182] An inference device,

[0183] The inference device includes an inference unit that inputs the electrical characteristics obtained from an object tire to be inferred into a learning model that uses the electrical characteristics of the conductive rubber provided on the tire and physical quantities related to the tire as learning data and is learned to input the electrical characteristics and output the physical quantities, and infers the physical quantities related to the object tire.

[0184] (Supplementary Note 4)

[0185] For the inference device according to Supplementary Note 3,

[0186] The electrical characteristics include the resistance of the conductive rubber.

[0187] (Supplementary Note 5)

[0188] The inference device according to Supplementary Note 3 or Supplementary Note 4, wherein

[0189] The physical quantity is a physical quantity related to the running of the tire.

[0190] (Supplementary Note 6)

[0191] The inference device according to any one of Supplementary Notes 3 to 5, wherein

[0192] The physical quantity includes the slip angle of the tire.

[0193] (Supplementary Note 7)

[0194] The inference device according to any one of Supplementary Notes 3 to 6, wherein

[0195] The physical quantity includes the camber angle of the tire.

[0196] (Supplementary Note 8)

[0197] The inference device according to any one of Supplementary Notes 3 to 7, wherein

[0198] The physical quantity includes the load applied to the tire.

[0199] (Supplementary Note 9)

[0200] The inference device according to any one of Supplementary Notes 3 to 8, wherein

[0201] The physical quantity includes the lateral force acting on the tire.

[0202] (Supplementary Note 10)

[0203] The inference device according to any one of Supplementary Notes 3 to 9, wherein

[0204] The conductive rubber has a contact portion provided at a position in contact with the rim.

[0205] (Supplementary Note 11)

[0206] The inference device according to Supplementary Note 10, wherein

[0207] The contact portion is provided at the bead portion.

[0208] (Supplementary Note 12)

[0209] The inference device according to Supplementary Note 10 or Supplementary Note 11, wherein

[0210] The rim has a conductive portion in contact with the contact portion.

[0211] (Supplementary Note 13)

[0212] The inference device according to Supplementary Note 12, wherein,

[0213] The conductive portion is provided on the bead seat portion.

[0214] (Supplementary Note 14)

[0215] An inference method, wherein,

[0216] The inference method includes a process of inputting the electrical characteristics obtained from a target tire to be inferred into a learning model that has been learned using the electrical characteristics of the conductive rubber equipped on the tire and the physical quantities related to the tire as learning data and outputs the physical quantities in a manner of inputting the electrical characteristics to infer the physical quantities related to the target tire.

[0217] (Supplementary Note 15)

[0218] A program, wherein,

[0219] The program is used to cause a computer to execute a process including a process of inputting the electrical characteristics obtained from a target tire to be inferred into a learning model that has been learned using the electrical characteristics of the conductive rubber equipped on the tire and the physical quantities related to the tire as learning data and outputs the physical quantities in a manner of inputting the electrical characteristics to infer the physical quantities related to the target tire.

[0220] (Supplementary Note 16)

[0221] A learning device, wherein,

[0222] The learning device includes a learning unit that generates a learning model which uses the electrical characteristics of the conductive rubber equipped on the tire and the physical quantities related to the tire as learning data and has been learned in a manner of inputting the electrical characteristics and outputting the physical quantities.

Claims

1. A tire, wherein, The tire has at least conductive rubber, and the conductive rubber has a contact portion disposed at a position in contact with the rim.

2. The tire according to claim 1, wherein, The contact portion is disposed at the bead portion.

3. The tire according to claim 1 or 2, wherein, The tire has a plurality of structural parts, and the conductive rubber is disposed in at least one of the plurality of structural parts.

4. The tire according to claim 3, wherein, The plurality of structural parts include a tread portion, a shoulder portion, a sidewall portion, and a bead portion.

5. The tire according to claim 3 or 4, wherein, The conductive rubber is disposed across a plurality of the plurality of structural parts.

6. The tire according to claim 3 or 4, wherein, The conductive rubber is disposed in one of the plurality of structural parts.

7. The tire according to any one of claims 1 to 6, wherein, At least a part of the conductive rubber is disposed on the inner surface of the tire.

8. The tire according to any one of claims 1 to 6, wherein, An airtight layer is provided on the inner surface of the tire, and at least a part of the conductive rubber is disposed on the airtight layer.

9. The tire according to any one of claims 1 to 8, wherein, The conductive rubber has an axial portion extending in the axial direction of the tire.

10. The tire according to any one of claims 1 to 9, wherein, The conductive rubber has a radial portion extending in the radial direction of the tire.

11. The tire according to any one of claims 1 to 10, wherein, The conductive rubber has a circumferential portion extending in the circumferential direction of the tire.

12. The tire according to any one of claims 1 to 11, wherein, The conductive rubber is formed in a ring shape in the circumferential direction of the tire.

13. The tire according to any one of claims 1 to 12, wherein, The conductive rubber is formed in a sheet shape.

14. The tire according to any one of claims 1 to 13, wherein, The tire includes a plurality of the conductive rubbers.

15. The tire according to claim 14, wherein, The tire further includes a connecting member that electrically connects the plurality of conductive rubbers.

16. The tire according to claim 14, wherein, The plurality of conductive rubbers are arranged separately from each other in at least one of the axial direction and the circumferential direction of the tire.

17. A tire - rim assembly, wherein, The tire-rim assembly includes: the tire according to any one of claims 1 to 16; and the rim.

18. The tire - rim assembly according to claim 17, wherein, The rim has a conductive portion that contacts the contact portion.

19. The tire - rim assembly according to claim 18, wherein, The contact portion is disposed at the bead portion, and the conductive portion is disposed at the rim seat portion.

20. The tire - rim assembly according to any one of claims 17 to 19, wherein, The tire-rim assembly further includes an output device electrically connected to the conductive rubber.

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