Information processing device, information processing program, and information processing system

Abstract

In the present invention, a server calculates, for each tire, a remaining durability amount of the tires from the use history of the tires. If identification information of a tire is received, the server determines retread specifications for the case when the tire represented by the identification information is set as a tire casing, the determination made by using the remaining durability amount of the tire represented by the identification information. The server then outputs the determined retread specifications.

Description

Information Processing Apparatus, Information Processing Program, and Information Processing System

[0001] The present disclosure relates to an information processing apparatus, an information processing program, and an information processing system.

[0002] Patent Document 1 discloses a state determination system that acquires state data including various information that can affect the deterioration of the base portion of a tire from a vehicle and calculates an evaluation value indicating the state of the base portion of the tire based on the acquired state data (for example, Japanese Patent Application Laid-Open No. 2022-161540).

[0003] In a mine, many mining vehicles are traveling on a roadway to transport the mined minerals. When the tires of such mining vehicles wear out, from the viewpoints of economy and reducing the load on the environment, instead of replacing them with new tires, the tread of the worn tire may be shaved and a new tread rubber may be attached thereto for tire reuse. The tire thus regenerated is called a "retread tire", and the operation of replacing the tread of the tire is called "retread".

[0004] When performing a retread on a tire, it is necessary to pre-determine retread specifications such as, for example, the thickness of the tread to be attached, the type of material used for the tread, and the layer configuration of the tread.

[0005] On the other hand, the degree of deterioration of the tires to be retread is different for each tire because their usage conditions are different. Therefore, if a retread is performed on all the tires to be retread according to the same retread specifications, in some cases, the life of the tire after retread may be unintentionally shortened.

[0006] The present disclosure has been made in view of the above points, and an object thereof is to provide an information processing apparatus, an information processing program, and an information processing system that can output a retread specification suitable for a tire on which a retread is to be performed.

[0007] The information processing device according to the first embodiment includes: a calculation unit that calculates the remaining durability of a tire for each tire represented by the identification information from the usage history of the tire associated with the identification information; a receiving unit that receives the identification information of a tire; a determination unit that determines the retread specifications when the tire represented by the received identification information is used as a base tire, using the remaining durability calculated by the calculation unit for the tire represented by the identification information received by the receiving unit; and an output unit that outputs the retread specifications determined by the determination unit.

[0008] The information processing device according to the second embodiment is an information processing device according to the first embodiment, wherein the usage history includes a history of physical quantities representing the tire temperature and the degree of tire deformation, the calculation unit calculates the remaining heat resistance of the tire from the tire temperature history and the remaining strain resistance of the tire from the degree of tire deformation represented by the change in the physical quantities, and the determination unit determines the retread specification using the remaining heat resistance and the remaining strain resistance of the tire represented by the received identification information.

[0009] The information processing device according to the third embodiment is an information processing device according to the second embodiment in which at least one of the tire's internal pressure and acceleration is used as the physical quantity.

[0010] The information processing device according to the fourth embodiment is an information processing device according to the third embodiment in which the acceleration used as the physical quantity is the acceleration of the vehicle or the acceleration of the tires.

[0011] The information processing device according to the fifth embodiment further uses the vehicle load as the physical quantity in the information processing device according to the fourth embodiment.

[0012] The information processing device according to the sixth embodiment is an information processing device according to any one of the second to fifth embodiments, in which the determination unit classifies the thermal resistance remaining durability into two categories, a first category in which the thermal resistance remaining durability is equal to or greater than the first threshold, and a second category in which the thermal resistance remaining durability is less than the first threshold, with a predetermined first threshold as the boundary. The strain resistance remaining durability also classifies into two categories, a first category in which the strain resistance remaining durability is equal to or greater than the second threshold, and a second category in which the strain resistance remaining durability is less than the second threshold, with a predetermined second threshold as the boundary. The retread specification is determined by a combination of the category in which the thermal resistance remaining durability is included and the category in which the strain resistance remaining durability is included.

[0013] In the information processing device according to the seventh embodiment, if the category including the heat resistance remaining durability and the strain resistance remaining durability is the first category, the determination unit determines the retread specification to be the first thickness out of three thicknesses, the first thickness, and the third thickness, which are arranged in order from thickest to thinnest, the rubber type used for the tread to be the rubber type with better wear resistance than the other of the two types of rubber to be compared, and the specification to make the upper layer of the tread, which is made of two layers consisting of a lower layer with higher heat resistance than the upper layer and an upper layer with higher wear resistance than the lower layer, thicker than the lower layer.

[0014] In the information processing device according to the eighth embodiment, in the information processing device according to the sixth embodiment, if the category including the residual heat resistance is the second category and the category including the residual strain resistance is the first category, the determination unit determines the retread specification to be the second thickness of the tread among the three thicknesses, the first thickness, and the third thickness, which are arranged in order from thickest to thinnest, and to be a rubber type that has better heat resistance than the other of the two types of rubber to be compared, and to make the lower layer of the tread, which is made into two layers, a lower layer with higher heat resistance than the upper layer and an upper layer with higher wear resistance than the lower layer, thicker than the upper layer.

[0015] In the information processing device according to the ninth embodiment, in the information processing device according to the sixth embodiment, if the category that includes the residual heat resistance is the first category and the category that includes the residual strain resistance is the second category, the determination unit determines the retread specification to be the second thickness of the tread from among the three thicknesses of the first thickness, second thickness, and third thickness arranged in order from the thickest to the thinnest, the rubber type used for the tread to be the rubber type that has better wear resistance than the other of the two types of rubber to be compared, and the specification to make the upper layer of the tread, which is made into two layers, a lower layer with higher heat resistance than the upper layer and an upper layer with higher wear resistance than the lower layer, thicker than the lower layer.

[0016] In the information processing apparatus according to the tenth embodiment, in the information processing apparatus according to the sixth embodiment, if the category including the heat resistance remaining durability and the strain resistance remaining durability is the second category, the determination unit determines the retread specification to be the third thickness out of three thicknesses, the first thickness, the second thickness, and the third thickness, which are arranged in order from thickest to thinnest, and to be a rubber type that has better heat resistance than the other of the two types of rubber to be compared, and to make the lower layer of the tread, which is made into two layers, a lower layer with higher heat resistance than the upper layer and an upper layer with higher wear resistance than the lower layer, thicker than the upper layer.

[0017] The information processing program according to the 11th embodiment is a program that causes a computer to perform the following processes: calculate the remaining durability of a tire for each tire represented by the identification information from the usage history of the tire associated with the identification information; receive the identification information of the tire; use the remaining durability of the tire represented by the received identification information to determine the retread specification when the tire represented by the received identification information is used as a base tire; and output the determined retread specification.

[0018] An information processing system according to the 12th embodiment includes: a calculation unit that calculates the remaining durability of a tire for each tire represented by the identification information from the usage history of the tire associated with the identification information; a reception unit that receives the identification information of a tire; a determination unit that determines the retread specifications when the tire represented by the received identification information is used as a base tire, using the remaining durability calculated by the calculation unit for the tire represented by the identification information received by the reception unit; and an output unit that outputs the retread specifications determined by the determination unit; and an information processing device comprising: a reading unit that reads the identification information of a tire; a transmission unit that transmits the identification information read by the reading unit to the information processing device; a receiving unit that receives the retread specifications output from the information processing device in response to the transmission of the identification information by the transmission unit; and a display unit that displays the retread specifications received by the receiving unit.

[0019] According to this disclosure, the effect is that it is possible to output a retread specification suitable for the tire that is to be retreaded.

[0020] This figure shows an example of a mining vehicle. This figure shows an example of the configuration of an information processing system. This figure shows an example of the data structure of vehicle information. This figure shows an example of the main components of the server's electrical system. This figure shows an example of the main components of the terminal's electrical system. This flowchart shows an example of the process flow for calculating remaining durability. This flowchart shows an example of the process flow for outputting retread specifications.

[0021] This embodiment will be described below with reference to the drawings. The same reference numerals are used throughout the drawings for the same components and processes, and redundant explanations are omitted. The dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from actual ratios.

[0022] Figure 1 shows an example of a mining vehicle 4 used in a mine. A mine is a place where minerals existing underground are extracted. Therefore, a mine does not necessarily have to be a raised area like a mountain; even flat land where minerals are extracted is called a mine. Furthermore, in this disclosure, the term "mine" is not limited to the narrow sense of mining metals, but also includes places where prospecting and mining of minerals useful as resources such as coal, lime, and stone are carried out.

[0023] Mining vehicles 4 include various types, such as shovels and wheel loaders. In this disclosure, mining vehicles 4 refer to all vehicles that travel on mine tracks using the tires they are equipped with. Therefore, a dump truck used to transport mined minerals, as shown in Figure 1, is an example of a mining vehicle 4. Hereafter, mining vehicles 4 will be simply referred to as "vehicle 4".

[0024] Each tire mounted on the vehicle 4 has an RF (Radio Frequency) tag 1 attached to its sidewall. The RF tag 1 is an IC (Integrated Circuit) chip that stores information, and the information stored in the RF tag 1 can be read using radio waves. This method of reading information from the RF tag 1 using radio waves is called RFID (Radio Frequency Identification). Therefore, the RF tag 1 may also be called an RFID tag, but in this disclosure, it will be referred to as "RF tag 1". As an example, the RF tag 1 has identification information pre-stored to uniquely identify each tire.

[0025] Furthermore, the mounting location of the RF tag 1 is not limited to the tire sidewall. For example, the RF tag 1 can be mounted anywhere on the tire except in the area that is worn down by retreading.

[0026] As shown in Figure 1, each wheel of a tire mounted on the vehicle 4 is equipped with a sensor 2 for acquiring tire-related information (hereinafter referred to as "tire information"). There are no restrictions on the type of tire information that the sensor 2 measures, but for example, each wheel is equipped with a sensor 2 that measures tire temperature, internal pressure, and acceleration as tire information. The sensor 2 outputs individual accelerations in the three axial directions represented by the X, Y, and Z axes, as well as a composite acceleration obtained by combining two or more accelerations in the X, Y, and Z axes.

[0027] Furthermore, sensor 2 has a reading function that acquires identification information from the RF tag 1 of the tire mounted on the wheel to which sensor 2 is attached. Sensor 2 measures the tire temperature, internal pressure, and acceleration in real time. In this case, the tire temperature, internal pressure, and acceleration may be measured using sensor 2, which can measure multiple physical quantities with a single sensor. Alternatively, for example, the tire temperature and internal pressure may be measured by a TPMS (Tire Pressure Monitoring System) attached to tire 2, and the acceleration may be measured by attaching an acceleration sensor separately to the tire. The measured values ​​measured by sensor 2 are associated with the tire's identification information in sensor 2 and transmitted wirelessly to the hub 3 attached to the vehicle 4. If sensor 2 does not have a reading function that acquires identification information from the RF tag 1, the user can manually register the identification information of the tire to be measured in sensor 2.

[0028] When Hub 3 acquires tire information from each of the sensors 2, it associates the acquired time with the tire information. This adds the measurement time to the tire information. Of course, Sensor 2 could also associate the measured time with the measured tire information and transmit it to Hub 3. In this case, it would be unnecessary for Hub 3 to add the measurement time to the tire information.

[0029] The hub 3 is equipped with a sensor unit (not shown) that measures information related to the movement of the vehicle 4 to which the hub 3 is attached (hereinafter referred to as "movement information"). There are no restrictions on the type of movement information that the sensor unit measures, but the sensor unit measures information such as the position, speed, acceleration, and tilt angle of the vehicle 4 in real time, as movement information, while associating it with the time of measurement of the information. If a sensor 2 that does not include a function to measure acceleration is used, the acceleration of the vehicle 4 measured by the sensor unit attached to the vehicle 4 may be used as the acceleration of the tires. In this disclosure, as an example, the acceleration of the tires is measured by the sensor 2.

[0030] Furthermore, the hub 3 stores the vehicle number of the vehicle 4 to which the hub 3 is attached. The vehicle number is information that uniquely identifies vehicle 4. The vehicle number does not necessarily have to be a number; it may also be letters or symbols.

[0031] Hub 3 transmits the vehicle number of vehicle 4, identification information for each tire mounted on vehicle 4, chronological tire information associated with the identification information of each tire, and chronological driving information associated with the vehicle number of vehicle 4 to server 10 (see Figure 2) via wireless communication. Hereafter, the vehicle number, identification information, tire information, and driving information transmitted to server 10 will be collectively referred to as "vehicle information." Hub 3 transmits vehicle information to server 10 at predetermined intervals, such as every minute, while vehicle 4 is in a drivable state. Hub 3 may also transmit vehicle information to server 10 when vehicle 4 reaches a predetermined state, such as when vehicle 4 starts driving or stops.

[0032] Figure 2 shows an example configuration of an information processing system 100 that outputs retreading specifications for a tire when a tire selected by the user is to be retreaded.

[0033] As shown in Figure 2, the information processing system 100 includes RF tags 1 attached to each tire of the vehicle 4, and sensors 2 installed on the wheels of each tire. The information processing system 100 also includes a hub 3 that receives tire information from each sensor 2 and transmits vehicle information, including the received tire information, to the server 10. The information processing system 100 also includes a terminal 6 that reads the RF tag 1 of the tire to be retreaded and transmits it to the server 10, and receives the retreading specifications for the tire from the server 10 and displays them to the user. Furthermore, the information processing system 100 includes a server 10 that calculates the remaining durability of each tire using the vehicle information received from the hub 3 and determines the retreading specifications according to the remaining durability.

[0034] Server 10 is an example of an information processing device in this disclosure and includes a reception unit 10A, a storage unit 10B, a calculation unit 10C, a determination unit 10D, and an output unit 10E.

[0035] The reception unit 10A receives vehicle information from the hub 3 via wireless communication. The reception unit 10A also receives tire identification information read by the user using the terminal 6. Furthermore, the reception unit 10A receives various instructions from the user, for example, through the input unit 5G (see Figure 4) provided in the server 10. Users include, for example, the vehicle operation manager, the retreading worker, and the driver of vehicle 4. The reception unit 10A notifies the storage unit 10B of the vehicle information received from the hub 3.

[0036] The memory unit 10B stores vehicle information for each of the 4 vehicles received from the reception unit 10A in the storage device.

[0037] Figure 3 shows an example of the data structure of vehicle information stored in the storage device. The storage unit 10B stores, for example, tire information for each tire mounted on vehicle 4, which is represented by a vehicle number, and driving information for vehicle 4, which is also represented by a vehicle number, in chronological order.

[0038] Therefore, as shown in Figure 3, the vehicle number is associated with the identification information of each tire mounted on the vehicle 4 represented by the vehicle number, and the tire information of each tire is associated with the tire information along with the measurement time of the tire information. In addition, the vehicle number is associated with the driving information of the vehicle 4 represented by the vehicle number, along with the measurement time of the driving information. Note that in Figure 3, “t ｎ The notation "(n is a non-negative integer)" represents the measurement time when each piece of information was measured. For example, a smaller value of n indicates that the information was measured earlier.

[0039] In other words, the memory unit 10B stores in the memory device historical information for each vehicle 4, which is an example of tire information, such as tire temperature, internal pressure, and acceleration, as well as historical information for each vehicle, such as speed, acceleration, and load, which is an example of driving information. Load refers to the weight of the cargo such as minerals loaded onto the vehicle 4, and will be referred to as "vehicle 4 load" hereafter. The historical information stored in the memory device is an example of the tire usage history.

[0040] The vehicle 4 driving information measured by the hub 3 is not limited to the items listed above. For example, it may also include information such as the vehicle 4's position and tire slip ratio.

[0041] In the server 10 shown in Figure 2, the calculation unit 10C uses the tire information stored in the storage device to calculate the remaining durability of each tire, represented by the identification information.

[0042] The remaining durability of a tire is an indicator that represents the degree to which a tire can be used safely, and is expressed, for example, by usable time or mileage. The usable time of a tire represents the remaining time that the vehicle 4 can be driven safely without any tire malfunction, based on the driving conditions of the vehicle 4 as shown by the most recent driving information. The mileage of a tire represents the remaining distance that the vehicle 4 can be driven safely without any tire malfunction, based on the driving conditions of the vehicle 4 as shown by the most recent driving information.

[0043] The calculation unit 10C calculates, for example, at a predetermined timing, either the remaining available time or the remaining available travel distance of each tire stored in the storage device as the remaining durability of the tire. The calculation unit 10C requests the storage unit 10B to store the calculated remaining durability of the tire in the storage device in association with the identification information of the tire from which the calculation is derived.

[0044] When calculating the remaining durability of the tire, the calculation unit 10C calculates the remaining durability from two viewpoints. The deterioration of the tire mainly progresses due to heat and distortion. Therefore, the calculation unit 10C calculates the remaining durability of the tire due to heat from the temperature history of the tire stored in the storage device. In addition, the calculation unit 10C calculates the remaining durability of the tire due to distortion from the physical quantity representing the degree of distortion of the tire stored in the storage device. Hereinafter, the physical quantity representing the degree of distortion of the tire is referred to as "distortion physical quantity".

[0045] Since the tire is more likely to deform as the internal pressure of the tire is lower, the internal pressure of the tire is an example of the distortion physical quantity. Also, since the force applied to the tire increases as the acceleration of the vehicle 4 increases, the tire is more likely to deform, so the acceleration of the vehicle 4 is also an example of the distortion physical quantity. Taking the acceleration in the vertical direction (Z-axis) as an example, when there is a load on the vehicle 4, a load is applied. Therefore, the vehicle 4 sinks and acceleration is detected. Also, when the vehicle 4 travels, it shakes in the vertical direction due to the unevenness of the road surface, so acceleration is detected. Thus, it can be considered that the acceleration in the vertical direction represents the repetition of the vertical deformation of the tire. Therefore, as the cumulative value of the acceleration in the period retroactively from the time when the latest tire information is obtained to a predetermined time is larger, it indicates that the tire has deformed more frequently. Therefore, the calculation unit 10C may calculate the remaining durability of the tire so that the remaining durability of the tire decreases. Also, not limited to the comprehensive cumulative value, for example, the behavior such as the increase in the cumulative value of the acceleration per unit time becoming larger can also be regarded as an influencing factor on the remaining durability of the tire.

[0046] Similarly, the influence on the remaining durability of the tire can be calculated for the acceleration in the X-axis direction and the acceleration in the Y-axis direction either alone or in combination with the acceleration in other axis directions (for example, inputs to the tire during braking and turning can be considered). The method for calculating the remaining durability of the tire can be determined as appropriate from the driving pattern of the vehicle 4 equipped with the target tire, etc. Note that the acceleration of the vehicle 4 may be used instead of the acceleration of the tire. In this case, depending on the object to be calculated, the same or almost the same results as when using the acceleration of the tire can be obtained, and since there is no need to install sensors for each tire or acquire acceleration data, the load such as cost can be reduced. Thus, using the acceleration of the vehicle 4 instead of the acceleration of the tire is a preferred form.

[0047] Further, since the larger the load of the vehicle 4, the easier the tire is to deform, the load of the vehicle 4 is also an example of the physical quantity of strain.

[0048] Hereinafter, the remaining durability of the tire against heat will be expressed as "remaining durability against heat", and the remaining durability of the tire against strain will be expressed as "remaining durability against strain". Also, the remaining durability against heat and the remaining durability against strain will be collectively referred to simply as "remaining durability". The specific method for calculating the remaining durability of the tire will be described later.

[0049] When the determination unit 10D receives the identification information of the tire for which retreading is to be performed from the terminal 6 through the reception unit 10A, it determines the retreading specification when the tire represented by the received identification information is used as the base tire. The base tire is the tire that serves as the base for retreading by shaving off the worn tread and attaching a new tread. The tread is the layer of the tire that contacts the road surface.

[0050] The retreading specifications determined by the determination unit 10D include, for example, the thickness of the tread, the type of material used for the tread, and the layer configuration of the tread.

[0051] The thickness of the tread is the thickness of the tread in the circumferential direction of the tread, that is, the direction intersecting the rotation direction of the tire.

[0052] Furthermore, the tread has a two-layer structure, for example, an upper layer and a lower layer. The upper layer is the layer of the two-layer tread that includes the contact surface with the road surface, and is also called the CAP layer. The lower layer is the layer of the two-layer tread that includes the interface that contacts the carcass, which forms the structure of the tire, and is also called the BASE layer. The layer structure of the tread indicates how the thickness of the upper and lower layers of the tread is set in a direction intersecting the tire's rotation direction, relative to the total thickness of the tread.

[0053] Furthermore, the rubber compositions used for the treads have characteristics that align with their respective compounding philosophies. Characteristics required for rubber compositions used for treads include, for example, heat resistance and abrasion resistance. Here, a heat-resistant rubber type refers to a rubber type that is more resistant to thermal degradation compared to other rubber types. Similarly, an abrasion-resistant rubber type refers to a rubber type that is more resistant to wear compared to other rubber types. In other words, the heat resistance and abrasion resistance described herein are relative expressions compared to other rubber types used for comparison, and do not represent specific numerical ranges.

[0054] Furthermore, since the upper layer of the tread is in contact with the road surface, a type of rubber with higher wear resistance is used for the upper layer than for the lower layer. Also, the lower layer of the tread tends to get hotter than the upper layer. Therefore, to suppress deterioration due to heat, a type of rubber with higher heat resistance is used for the lower layer than for the upper layer.

[0055] The determination unit 10D determines the retread specification using the tire's remaining heat resistance and remaining strain resistance, which are represented by the received identification information. The specific determination method will be explained later.

[0056] The output unit 10E outputs the retread specification determined by the determination unit 10D to the terminal 6 that transmitted the identification information. As a result, the terminal 6 displays the retread specification for the tire whose identification information it read.

[0057] On the other hand, as shown in Figure 2, the terminal 6 includes a reading unit 6A, a communication unit 6B, and a display unit 6C. The terminal 6 is an information device used, for example, by a worker performing retreading. Naturally, it goes without saying that, for example, a user other than a worker may also use the terminal 6. This disclosure describes an example in which a worker uses the terminal 6.

[0058] The reading unit 6A reads the identification information of the tire that will be used as the base tire for retreading via the RF reader 7J (see Figure 5) in accordance with the operator's instructions.

[0059] The communication unit 6B transmits the tire identification information read by the reading unit 6A to the server 10, and also receives the retread specifications output from the server 10 in response to the transmission of the identification information. In other words, the communication unit 6B is an example of a transmitting unit and a receiving unit according to this disclosure.

[0060] The display unit 6C displays the retread specifications acquired from the server 10 to the worker via the output unit 7H (see Figure 5). This provides the worker with the retread specifications of the tire whose identification information has been read from the information processing system 100.

[0061] Although Figure 2 shows only one terminal 6, there is no restriction on the number of terminals 6 included in the information processing system 100, and multiple terminals 6 may exist. Similarly, although Figure 2 shows only one vehicle 4 in the information processing system 100, there may be multiple vehicles 4 that transmit vehicle information to the server 10.

[0062] The server 10 having the functional configuration shown in Figure 2 is configured using, for example, a computer 5. Figure 4 shows an example of the main components of the electrical system of the server 10 configured using the computer 5.

[0063] Computer 5 includes a CPU (Central Processing Unit) 5A, which is an example of a processor; RAM (Random Access Memory) 5B, which is used as a temporary workspace for the CPU 5A; non-volatile memory 5C; and an input / output interface (I / O) 5D. The CPU 5A, RAM 5B, non-volatile memory 5C, and I / O 5D are connected to each other via a bus 5E to transfer data.

[0064] The CPU 5A reads, for example, an information processing program stored in the non-volatile memory 5C and executes the processing of each functional unit in the server 10 shown in Figure 2.

[0065] Non-volatile memory 5C is an example of a storage device that retains stored information even when the power supplied to it is cut off. For example, semiconductor memory (Solid State Drive: SSD) is used. Information that would be problematic if lost each time the power to the server 10 is cut off, such as vehicle information and information processing programs, is stored in non-volatile memory 5C. Note that non-volatile memory 5C does not necessarily have to be built into the computer 5; for example, it may be a portable storage device that can be attached to or detached from the computer 5.

[0066] On the other hand, I / O 5D is connected to, for example, a communication unit 5F, an input unit 5G, and an output unit 5H.

[0067] The communication unit 5F is connected to a communication line (not shown) and is equipped with a communication protocol for sending and receiving data wirelessly or via wired connection with external devices connected to the communication line. For example, the communication unit 5F is connected to a hub 3 and a terminal 6, etc.

[0068] The input unit 5G is a device that receives information from the user and notifies the CPU 5A, and can be a keyboard, mouse, buttons, or touch panel, for example.

[0069] The output unit 5H is a device that outputs information processed by, for example, the CPU 5A to an external device. There are no restrictions on the form of information output as long as the user can recognize the information, and the output unit 5H outputs information to an external device using at least one output form, such as displaying the information on a monitor, printing the information on paper, and transmitting the information to an external device. For the sake of explanation, the output unit 5H of this disclosure will be assumed to display information on a monitor.

[0070] The units connected to I / O 5D are selected as needed. Therefore, the communication unit 5F, input unit 5G, and output unit 5H are not necessarily connected to I / O 5D.

[0071] Similarly, the terminal 6 having the functional configuration shown in Figure 2 is configured using, for example, a computer 7. Figure 5 shows an example of the main components of the electrical system of the terminal 6 configured using the computer 7.

[0072] Computer 7, like computer 5 which constitutes server 10 shown in Figure 4, is equipped with a CPU 7A, which is an example of a processor, RAM 7B used as a temporary workspace for CPU 7A, non-volatile memory 7C, and I / O 7D. CPU 7A, RAM 7B, non-volatile memory 7C, and I / O 7D are connected to each other via bus 7E to exchange data.

[0073] The CPU 7A reads the terminal program stored in the non-volatile memory 7C, for example, and executes the processing of each functional unit in the terminal 6 shown in Figure 2.

[0074] On the other hand, I / O 7D is connected to, for example, a communication unit 7F, an input unit 7G, an output unit 7H, and an RF reader 7J.

[0075] The communication unit 7F is connected to a communication line and is equipped with a communication protocol for sending and receiving data wirelessly or via wired connection with a server 10 or the like that is connected to the communication line.

[0076] The input unit 7G is a device that receives information from the worker and notifies the CPU 7A, and can be a button, touch panel, or the like.

[0077] The output unit 7H is comprised of, for example, a display that shows information processed by the CPU 7A.

[0078] As previously explained, the RF reader 7J uses radio waves to read identification information from the RF tag 1 within its reading range.

[0079] Depending on the situation, I / O 7D may be connected to units other than the communication unit 7F, input unit 7G, output unit 7H, and RF reader 7J.

[0080] Next, we will explain how the remaining durability of a tire is calculated in the information processing system 100. Figure 6 is a flowchart showing an example of the calculation process flow executed by the CPU 5A of the server 10 when a command to calculate the remaining durability is received.

[0081] The server 10 may accept instructions from the user to calculate the remaining durability, but it may also autonomously perform the remaining durability calculation process at predetermined intervals, such as every week. The CPU 5A of the server 10 reads the information processing program stored in the non-volatile memory 5C and performs the remaining durability calculation process. It is assumed that the non-volatile memory 5C already stores vehicle information for each vehicle 4.

[0082] In step S10 of Figure 6, the CPU 5A selects one of the tire identification information associated with each vehicle number stored in the non-volatile memory 5C that has not yet been selected. Hereafter, the identification information selected by the process in step S10 will be referred to as the "selected identification information".

[0083] In step S20, the CPU 5A uses the temperature history of the tire associated with the selection identification information to calculate the remaining heat resistance of the tire represented by the selection identification information.

[0084] Generally, tires tend to deteriorate faster as their temperature increases. Therefore, CPU 5A calculates the remaining heat resistance of a tire, represented by the selection identification information, such that the higher the cumulative temperature of the tire over a period of time from when the latest tire information was obtained to a predetermined point in time, the lower the remaining heat resistance. To calculate the remaining heat resistance, for example, a correspondence table that associates the cumulative temperature of the tire with the remaining heat resistance of the tire, or a function that uses the cumulative temperature of the tire as the explanatory variable and the remaining heat resistance of the tire as the dependent variable can be used. Alternatively, CPU 5A may calculate the remaining heat resistance of a tire using an estimation model that has been pre-machine-trained to output the remaining heat resistance of the tire when the cumulative temperature of the tire is input.

[0085] The CPU 5A stores the remaining thermal endurance, along with the calculation time, in the non-volatile memory 5C, associating it with the selected identification information.

[0086] In step S30, the CPU 5A calculates the remaining strain resistance of the tire, represented by the selection identification information, from the degree of tire strain, which is represented by the change in the strain physical quantity associated with the selection identification information. The CPU 5A uses at least one of the following as the strain physical quantity for calculating the remaining strain resistance: for example, the internal pressure of the tire and the acceleration. As explained earlier, it is preferable to use the acceleration of the vehicle 4 for cost reasons, for example, but the acceleration of the tire may be used as a substitute.

[0087] Generally, the greater the tire deformation, the more the tire tends to deteriorate. The amount of tire deformation can be represented, for example, by the change in the tire's internal pressure. Therefore, CPU 5A calculates the amount of internal pressure change, which is the difference between the highest and lowest internal pressures of the tire each day, and calculates the amount of remaining strain resistance of the tire, represented by the selected identification information, such that the larger the cumulative value of the amount of internal pressure change over a period from when the latest tire information was obtained to a predetermined time, the lower the remaining strain resistance.

[0088] To calculate the remaining strain resistance, for example, a correspondence table that associates the cumulative change in tire internal pressure with the tire's remaining strain resistance, or a function that uses the cumulative change in tire internal pressure as the explanatory variable and the tire's remaining strain resistance as the dependent variable, can be used. Alternatively, CPU 5A may calculate the tire's remaining strain resistance using an estimation model that has been pre-machine-trained to output the tire's remaining strain resistance when the cumulative change in tire internal pressure is input.

[0089] Furthermore, a large daily change in internal pressure may indicate that the tire is being used at an inappropriate internal pressure, that it has been subjected to continuous or large impacts, or that there is some kind of defect in the tire. Therefore, CPU 5A may calculate the remaining strain resistance of the tire, represented by the selection identification information, such that the more days the daily change in internal pressure exceeds a predetermined threshold during the period from when the latest tire information is obtained to a predetermined time, the lower the remaining strain resistance will be.

[0090] Furthermore, the calculation period for the change in internal pressure does not necessarily have to be in days; it can be any predetermined period, such as one week or one month.

[0091] As already explained, the acceleration of vehicle 4 and the load on vehicle 4 are also examples of strain physical quantities. Therefore, CPU 5A may calculate the tire's remaining strain resistance using the tire's internal pressure and at least one of the vehicle 4's acceleration and the vehicle 4's load.

[0092] As an example, the remaining strain resistance of a tire is calculated using the tire's internal pressure, the vehicle's acceleration, and the vehicle's load. In this case, the CPU 5A calculates the cumulative value of the change in internal pressure, the cumulative value of the acceleration, and the cumulative value of the load during the period from when the latest tire information was obtained to a predetermined time. The CPU 5A calculates the remaining strain resistance of the tire, represented by the selected identification information, such that the larger the calculated cumulative value of the change in internal pressure, the larger the cumulative value of the acceleration, and the load, the smaller the remaining strain resistance.

[0093] In addition to the internal pressure of the tire, correspondence tables, functions, and estimation models using machine learning are also used to calculate the tire's residual durability against strain, using at least one of the acceleration of the vehicle 4 and the load on the vehicle 4.

[0094] Furthermore, the internal pressure of the tire is not necessarily required to calculate the remaining strain resistance of the tire; it may also be calculated from the acceleration of the vehicle 4. Alternatively, the remaining strain resistance of the tire may be calculated from the acceleration of the vehicle 4 and the load of the vehicle 4, or from the load of the vehicle 4 alone. In other words, the CPU 5A calculates at least one of the cumulative value of the acceleration of the vehicle 4 and the cumulative value of the load of the vehicle 4 over a period of time from when the latest tire information was obtained to a predetermined time. The CPU 5A calculates the remaining strain resistance of the tire, represented by the selection identification information, such that the larger at least one of the calculated cumulative value of acceleration and cumulative value of load, the lower the remaining strain resistance.

[0095] The CPU 5A stores the remaining strain tolerance, with the calculation time added, in the non-volatile memory 5C, associating it with the selection identification information.

[0096] In step S40, the CPU 5A determines whether there is any unselected identification information among the identification information selected in step S10. If there is unselected identification information, the process proceeds to step S10, and one piece of identification information is selected from the unselected identification information to become the new selected identification information. The CPU 5A repeatedly performs the process of calculating the remaining durability of each tire using the vehicle information of the tire represented by the new selected identification information.

[0097] On the other hand, if the determination process in step S40 determines that there is no unselected identification information, the CPU 5A terminates the calculation process shown in Figure 6.

[0098] Based on the above, the remaining durability is calculated for all tires whose identification information is stored in the non-volatile memory 5C.

[0099] Next, the method for outputting retread specifications in the information processing system 100 will be described. Figure 7 is a flowchart showing an example of the flow of retread specification output processing executed by the CPU 5A of the server 10 when tire identification information is received from the terminal 6.

[0100] The CPU 5A of server 10 reads the information processing program stored in the non-volatile memory 5C and executes the output processing for the retread specification. The non-volatile memory 5C is assumed to already store the remaining durability of each tire calculated by the calculation process shown in Figure 6.

[0101] In step S50 of Figure 7, the CPU 5A obtains the remaining thermal durability amount associated with the tire identification information received from the terminal 6 from the non-volatile memory 5C. If multiple remaining thermal durability amounts are associated with the identification information, the CAP 5A obtains the latest remaining thermal durability amount.

[0102] In step S60, the CPU 5A obtains the remaining strain resistance capacity associated with the tire identification information received from the terminal 6 from the non-volatile memory 5C. If multiple remaining strain resistance capacity capacities are associated with the identification information, the CAP 5A obtains the latest remaining strain resistance capacity.

[0103] In step S70, the CPU 5A classifies the remaining thermal endurance obtained in step S50 and the remaining strain endurance obtained in step S60 into two categories, each corresponding to the value of the remaining endurance.

[0104] Specifically, CPU 5A classifies the thermal resistance remaining durability into Category A or Category B, using a first threshold as the boundary. Category A in thermal resistance remaining durability is the category to which tires are classified when their thermal resistance remaining durability is equal to or greater than the first threshold. Category B in thermal resistance remaining durability is the category to which tires are classified when their thermal resistance remaining durability is less than the first threshold. Therefore, the condition of a tire with thermal resistance remaining durability classified into Category A may be described as "low thermal fatigue," and the condition of a tire with thermal resistance remaining durability classified into Category B may be described as "high thermal fatigue."

[0105] Furthermore, CPU 5A classifies the remaining strain resistance into Category A or Category B, using the second threshold as the boundary. Category A in terms of remaining strain resistance is the category to which tires are classified when the remaining strain resistance is equal to or greater than the second threshold. Category B in terms of remaining strain resistance is the category to which tires are classified when the remaining strain resistance is less than the second threshold. Therefore, the condition of a tire with remaining strain resistance classified into Category A may be described as "low strain fatigue," and the condition of a tire with remaining strain resistance classified into Category B may be described as "high strain fatigue."

[0106] The first and second thresholds are user-defined parameters, pre-stored in, for example, non-volatile memory 5C. The first and second thresholds can be changed by the user. Categories A and B in thermal residual durability are examples of the first and second categories of thermal residual durability according to this disclosure. Categories A and B in strain residual durability are examples of the first and second categories of strain residual durability according to this disclosure.

[0107] In step S80, the CPU 5A determines the retread specification of the tire represented by the identification information received from terminal 6, based on the combination of the category containing the remaining heat resistance and the category containing the remaining strain resistance, which were classified by the processing in step S70. For the sake of explanation, the tire represented by the identification information received from terminal 6 will be referred to as the "specified tire".

[0108] (Case A) For example, if the heat resistance and strain resistance of the specified tire are both in category A, CPU 5A will determine the retread specifications for the specified tire as follows.

[0109] The fact that the specified tire exhibits little distortion fatigue and little thermal fatigue means that the specified tire still has the durability to withstand long-term use. Therefore, CPU 5A increases the thickness of the tread to extend the period until the depth of the grooves etched into the tread wears down to the specified depth as much as possible. In other words, CPU 5A determines the tread thickness to extend the lifespan of the tire after retreading.

[0110] Assume that there are three specified tread thicknesses: 1st thickness > 2nd thickness > 3rd thickness. In this case, CPU 5A determines the tread thickness of the specified tire to be the 1st thickness. While increasing the tread thickness suppresses heat dissipation and makes the tire more susceptible to heat, the specified tire has low thermal fatigue, so even with the tread thickness set to the 1st thickness, the effects of heat remain within an acceptable range.

[0111] Furthermore, CPU 5A determines the type of rubber material used for the tread to be wear-resistant in order to extend the time it takes for the grooves etched into the tread to wear down to a specified depth.

[0112] Furthermore, in order to extend the lifespan of the specified tire after retreading as much as possible, CPU 5A determines the tread layer configuration to be such that the upper layer of the tread is thicker than the lower layer of the tread.

[0113] (Case B) For example, if the heat resistance remaining durability of the specified tire is in category B and the strain resistance remaining durability is in category A, CPU 5A will determine the retread specification for the specified tire as follows.

[0114] If the specified tire's thermal resistance is less than that of Case A, then the specified tire corresponding to Case B will experience more thermal fatigue than the specified tire corresponding to Case A. In this case, increasing the tread thickness makes it easier for heat to build up in the tire, and since the specified tire already experiences a lot of thermal fatigue after retreading, it will be more susceptible to further deterioration due to heat. On the other hand, since the specified tire has little distortion fatigue, if the tread thickness is reduced to the third thickness, the specified tire may reach the end of its lifespan due to tread wear before it reaches the end of its lifespan due to thermal deterioration. Therefore, CPU 5A determines the tread thickness of the specified tire to be the second thickness, which is thinner than the first thickness and thicker than the third thickness.

[0115] Furthermore, compared to Case A, the specified tire has already experienced more thermal fatigue. Therefore, in order to extend the lifespan of the specified tire after retreading as much as possible, it is preferable to suppress further deterioration due to heat. Accordingly, CPU 5A determines that the material used for the tread is a heat-resistant type of rubber.

[0116] For similar reasons, CPU 5A was designed with a thicker lower layer of the tread than the upper layer to suppress further deterioration of the specified tire after retreading due to heat.

[0117] (Case C) For example, if the heat resistance of the specified tire is in category A and the strain resistance is in category B, CPU 5A will determine the retread specifications for the specified tire as follows.

[0118] If the tread thickness of the specified tire is increased to the first thickness simply because the specified tire experiences little thermal fatigue, the time it takes for the grooves in the tread to wear down to the specified depth will also be extended. During this time, the distortion fatigue of the specified tire after retreading, which is already prone to distortion fatigue, will further accelerate. On the other hand, since the specified tire experiences little thermal fatigue, it is not necessary to reduce the tread thickness to the third thickness to suppress thermal deterioration of the specified tire after retreading more than necessary. Therefore, CPU 5A determines the tread thickness of the specified tire to be the second thickness, which is thinner than the first thickness and thicker than the third thickness.

[0119] Furthermore, since it is not necessary to suppress the deterioration of the specified tire due to heat after retreading more than necessary, CPU 5A determines that the type of material used for the tread is a wear-resistant rubber type.

[0120] For similar reasons, CPU 5A decides on a tread layer configuration in which the upper layer of the tread is thicker than the lower layer.

[0121] (Case D) For example, if the heat resistance and strain resistance of the specified tire are both in category B, CPU 5A will determine the retread specifications for the specified tire as follows.

[0122] The fact that the specified tires experience significant distortion fatigue and also significant thermal fatigue indicates that they do not possess the durability to withstand long-term use. Therefore, even if the tread thickness is increased to extend the time it takes for the grooves to wear down to the specified depth, the heat and distortion applied during that time may cause the retreaded specified tires to reach the end of their lifespan before the grooves reach the specified depth. Furthermore, because the specified tires experience significant thermal fatigue, it is preferable for the tread thickness to be as thin as possible. For these reasons, CPU 5A determines the tread thickness of the specified tires to be the third thickness.

[0123] Furthermore, since the specified tires are deteriorating due to the effects of heat and distortion, there is little need to use a wear-resistant rubber type for the tread to maintain the lifespan of the specified tires after retreading as long as possible. In this case, it is preferable to suppress further deterioration of the specified tires due to heat. Therefore, CPU 5A decides to use a heat-resistant rubber type for the material used for the tread.

[0124] For similar reasons, CPU 5A was designed with a thicker lower layer of the tread than the upper layer to suppress further deterioration of the specified tire due to heat after retreading.

[0125] In step S90, the CPU 5A outputs the retread specifications for the retreaded tire, determined by the processing in step S80, when the specified tire is used as the base tire, to the terminal 6, which is the source of the identification information, via the communication unit 5F.

[0126] The CPU 7A of terminal 6, which received the retread specification from server 10, displays the received retread specification on output unit 7H. With this, the CPU 5A of server 10 terminates the output processing of the retread specification shown in Figure 7.

[0127] In addition, the CPU 7A may output the retread specifications to the terminal 6 and also display the retread specifications of the specified tire on the output unit 5H of the server 10. Furthermore, the CPU 7A may output the retread specifications of the specified tire to a pre-specified external device other than the terminal 6.

[0128] As described above, when the server 10 in this disclosure receives tire identification information from the terminal 6, it determines the retread specification using the pre-calculated remaining heat resistance and remaining strain resistance of the designated tire, and outputs the determined retread specification to the terminal 6. Therefore, the worker can determine the optimal retread specification when the designated tire is used as the base tire.

[0129] Furthermore, the calculation of the remaining durability of each tire may be performed by an external device other than the server 10. In this case, the server 10 obtains the calculation result of the remaining durability from the external device and stores the obtained remaining durability in the non-volatile memory 5C in association with the tire identification information. Therefore, the calculation unit 10C of the server 10 becomes unnecessary.

[0130] Although one form of the information processing system 100 has been described above using embodiments, the disclosed form is merely an example, and the form of the information processing system 100 is not limited to the scope described in the embodiments. Various modifications or improvements can be made to the embodiments without departing from the gist of this disclosure, and such modified or improved forms of the information processing system 100 are also included within the technical scope of the disclosure.

[0131] In the above embodiment, as an example, a configuration in which each process shown in Figures 6 and 7 is implemented in software was described. However, the equivalent processes shown in the flowcharts for each process may also be executed in hardware. In this case, the processing speed can be increased compared to the case in which each process is implemented in software.

[0132] Furthermore, in the above embodiment, an example was described in which the information processing program is stored in the non-volatile memory 5C of the server 10 and the terminal program is stored in the non-volatile memory 7C of the terminal 6. However, the storage locations of the information processing program and the terminal program are not limited to the non-volatile memory 5C and the non-volatile memory 7C, respectively. The information processing program and the terminal program can also be provided in a form recorded on a storage medium that can be read by a computer.

[0133] For example, information processing programs and terminal programs may be provided in a form recorded on portable semiconductor memory such as USB (Universal Serial Bus) memory and memory cards. Non-volatile memory 5C, non-volatile memory 7C, USB, and memory cards are examples of non-transitor storage media.

[0134] Furthermore, the CPU 5A of the server 10 may download an information processing program from an external device via the communication unit 5F and store the downloaded information processing program in the non-volatile memory 5C. Similarly, the CPU 7A of the terminal 6 may download a terminal program from an external device via the communication unit 7F and store the downloaded terminal program in the non-volatile memory 7C. The information processing program and terminal program of this invention can be provided as a program product. A program product includes all forms of products for providing a program. For example, a program product includes a program provided via a network such as the Internet, and non-temporary recording media such as CD-ROMs and DVD-ROMs on which the program is stored.

[0135] In the embodiments, CPU 5A and CPU 7A were used as examples of general-purpose processors for explanation. However, in the embodiments, the term "processor" refers to a broader type of processor, including not only general-purpose processors like CPU 5A and CPU 7A, but also dedicated processors (e.g., GPU: Graphics Processing Unit, ASIC: Application Specific Integrated Circuit, FPGA: Field Programmable Gate Array, NPU: Neural Processing Unit, programmable logic device, etc.).

[0136] Furthermore, the operation of the processor in the above-described embodiment may not be performed by a single processor, but may be performed by multiple processors working together, or by multiple processors located in physically separate locations working together. This disclosure can also be applied to programs and program products.

[0137] The disclosure of Japanese Patent Application No. 2024-225614, filed on December 20, 2024, is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards described herein are incorporated herein by reference to the same extent as if each individual document, patent application, and technical standard were specifically and individually noted to be incorporated by reference.

Claims

1. An information processing device comprising: a calculation unit that calculates the remaining durability of a tire for each tire represented by the identification information, based on the tire usage history associated with the identification information; a receiving unit that receives the tire's identification information; a determination unit that determines the retread specifications when the tire represented by the received identification information is used as a base tire, using the remaining durability calculated by the calculation unit for the tire represented by the identification information received by the receiving unit; and an output unit that outputs the retread specifications determined by the determination unit.

2. The information processing device according to claim 1, wherein the usage history includes the history of the tire temperature and the degree of tire deformation, the calculation unit calculates the remaining heat resistance of the tire from the tire temperature history and the remaining deformation resistance of the tire from the degree of tire deformation represented by the change in the physical quantity, and the determination unit determines the retread specification using the remaining heat resistance and the remaining deformation resistance of the tire represented by the received identification information.

3. The information processing apparatus according to claim 2, wherein at least one of the internal pressure of a tire and acceleration is used as the physical quantity.

4. The information processing apparatus according to claim 3, wherein the acceleration used as the physical quantity is the acceleration of the vehicle or the acceleration of the tire.

5. The information processing apparatus according to claim 4, wherein the load of the vehicle is further used as the physical quantity.

6. The determination unit classifies the thermal resistance remaining durability into two categories, a first category in which the thermal resistance remaining durability is equal to or greater than the first threshold, and a second category in which the thermal resistance remaining durability is less than the first threshold, using a predetermined first threshold as the boundary; and classifies the strain resistance remaining durability into two categories, a first category in which the strain resistance remaining durability is equal to or greater than the second threshold, and a second category in which the strain resistance remaining durability is less than the second threshold, using a predetermined second threshold as the boundary; and determines the retread specification based on a combination of the category in which the thermal resistance remaining durability is included and the category in which the strain resistance remaining durability is included, according to any one of claims 2 to 5.

7. When the categories that include the heat resistance residual durability and the strain resistance residual durability are each in the first category, the determination unit determines the retread specification to be the first thickness out of three thicknesses, the first thickness, and the third thickness, which are arranged in order from thickest to thinnest, the rubber type used for the tread to be the rubber type that has better wear resistance than the other of the two types of rubber to be compared, and the specification that the upper layer of the tread, which is made of two layers, a lower layer with higher heat resistance than the upper layer and an upper layer with higher wear resistance than the lower layer, is thicker than the lower layer, as the retread specification, as described in claim 6.

8. The information processing apparatus according to claim 6, wherein, if the category containing the residual heat resistance is the second category and the category containing the residual strain resistance is the first category, the determination unit determines, as the retread specification, that the thickness of the tread is the second thickness out of three thicknesses, the first thickness, and the third thickness, which are arranged in order from thickest to thinnest, the rubber type used for the tread is the rubber type with higher heat resistance out of two types of rubber to be compared, and the lower layer of the tread, which is made into two layers consisting of a lower layer with higher heat resistance than the upper layer and an upper layer with higher wear resistance than the lower layer, is made thicker than the upper layer.

9. The information processing apparatus according to claim 6, wherein, if the category containing the residual heat resistance is the first category and the category containing the residual strain resistance is the second category, the determination unit determines, as the retread specification, that the thickness of the tread is the second thickness out of three thicknesses, the first thickness, and the third thickness, which are arranged in order from thickest to thinnest, the rubber type used for the tread is the rubber type that has better wear resistance than the other of the two types of rubber to be compared, and the upper layer of the tread, which is made into two layers, a lower layer with higher heat resistance than the upper layer and an upper layer with higher wear resistance than the lower layer, is thicker than the lower layer.

10. The information processing apparatus according to claim 6, wherein, when the categories including the heat resistance remaining durability and the strain resistance remaining durability are each in the second category, the determination unit determines, as the retread specification, that the thickness of the tread is the third thickness out of three thicknesses, the first thickness, the second thickness, and the third thickness, which are arranged in order from thickest to thinnest, the rubber type used for the tread is the rubber type that has better heat resistance than the other of the two types of rubber to be compared, and the lower layer of the tread, which is made into two layers, a lower layer with higher heat resistance than the upper layer and an upper layer with higher wear resistance than the lower layer, is made thicker than the upper layer.

11. An information processing program that causes a computer to perform the following processes: calculate the remaining durability of a tire for each tire represented by the identification information based on the tire's usage history associated with the identification information; receive the tire's identification information; determine the retread specification for the tire represented by the received identification information, using the remaining durability of the tire represented by the received identification information as the base tire; and output the determined retread specification.

12. An information processing device comprising: a calculation unit that calculates the remaining durability of a tire for each tire represented by the identification information based on the usage history of the tire associated with the identification information; a reception unit that receives the identification information of a tire; a determination unit that determines the retread specifications when the tire represented by the received identification information is used as a base tire, using the remaining durability calculated by the calculation unit for the tire represented by the identification information received by the reception unit; and an output unit that outputs the retread specifications determined by the determination unit; and an information processing system including a terminal comprising: a reading unit that reads the identification information of a tire; a transmission unit that transmits the identification information read by the reading unit to the information processing device; a receiving unit that receives the retread specifications output from the information processing device in response to the transmission of the identification information by the transmission unit; and a display unit that displays the retread specifications received by the receiving unit.

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