Tire management device, program, and tire management method

Abstract

Accurately assess the risk level of the tires. [Solution] The tire management device 10 includes a control unit 15 that acquires information on the internal pressure of the tires 21 mounted on the vehicle 20, acquires information on the remaining tread depth of the tires 21, acquires information on the temperature after a predetermined period, estimates the internal pressure of the tires 21 after a predetermined period based on the internal pressure information and temperature information, calculates a first performance index that the internal pressure of the tires 21 after a predetermined period affects grip performance and braking performance based on the estimated internal pressure of the tires 21 after a predetermined period, calculates a second performance index that the remaining tread depth of the tires 21 affects grip performance and braking performance based on the remaining tread depth of the tires 21, and determines the risk status of the tires 21 after a predetermined period based on the first and second performance indexes.

Description

Technical Field

[0001] The present disclosure relates to a tire management device, a program, and a tire management method.

Background Art

[0002] When the state of a tire is appropriately managed, the performance of the tire can be exhibited as expected, and the tire can be used safely. Therefore, appropriately managing the state of the tire is very important.

[0003] In particular, the internal pressure and remaining groove amount of a tire greatly affect the grip performance and braking performance of the tire, which are essential for safe driving. Therefore, it is required to appropriately manage the internal pressure and remaining groove amount of the tire.

[0004] For example, Patent Document 1 discloses a method of assisting tire maintenance by providing tire maintenance information including the time transition of tire air pressure data, predicted data of the remaining groove amount of the tire, and the like.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] According to the tire maintenance support method disclosed in Patent Document 1, it is possible to know the timing when maintenance is expected to be required. However, it is difficult for the user to determine the degree of risk based on the state of the tire.

[0007] In view of such circumstances, an object of the present disclosure is to provide a tire management device, a program, and a tire management method that enable accurate determination of the degree of risk of a tire. [Means for solving the problem]

[0008] (1) A tire management device according to one embodiment of the present disclosure is The system obtains information on the internal pressure of the tires mounted on the vehicle. The information on the remaining tread depth of the aforementioned tire is obtained, Obtain temperature information after a specified period, Based on the internal pressure information and the temperature information, the internal pressure of the tire after the predetermined period is estimated. Based on the estimated internal pressure of the tire after the predetermined period, a first performance index is calculated that the internal pressure of the tire has on grip performance and braking performance after the predetermined period. Based on the remaining tread depth of the tire, a second performance index is calculated that the remaining tread depth of the tire has an effect on grip performance and braking performance. A control unit determines the risk status of the tire after a predetermined period based on the first performance indicator and the second performance indicator. It is equipped with. This configuration allows for a highly accurate assessment of the tire's risk level.

[0009] (2) A tire management device according to one embodiment of the present disclosure is a tire management device described in (1) above, The control unit transmits the risk status to a first terminal device owned by the user of the vehicle. This configuration allows the vehicle user to understand the vehicle's risk status after a predetermined period.

[0010] (3) A tire management device according to one embodiment of the present disclosure is a tire management device described in (1) or (2) above, The control unit transmits maintenance suggestion information to the first terminal device if the risk indicator included in the risk state is above a predetermined threshold. This configuration allows vehicle users to know what maintenance is required if the vehicle's risk status exceeds a predetermined threshold after a specified period.

[0011] (4) A tire management device according to one embodiment of the present disclosure is a tire management device according to any one of (1) to (3) above, Equipped with additional memory, The aforementioned storage unit is A first relational expression relating the internal pressure of the tire to the first performance index, A second relational expression relating the remaining tread depth of the tire to the second performance indicator, It stores [something]. This configuration allows for the calculation of a first performance indicator based on the first relational equation, and a second performance indicator based on the second relational equation.

[0012] (5) A tire management device according to one embodiment of the present disclosure is a tire management device according to any one of (1) to (4) above, The memory unit stores a database that associates the first performance indicator and the second performance indicator with the risk status. This configuration allows the system to refer to a database and determine the risk status based on the first and second performance indicators.

[0013] (6) A tire management device according to one embodiment of the present disclosure is a tire management device according to any one of (1) to (5) above, The control unit, The location information of the vehicle is acquired, and the storage location of the vehicle is estimated based on the acquired location information. Obtain the temperature information for the region including the estimated storage location. This configuration makes it possible to obtain temperature information at the vehicle's storage location after a predetermined period of time.

[0014] (7) A tire management device according to one embodiment of the present disclosure is a tire management device according to any one of (1) to (6) above, The control unit, The risk status of the tires of multiple vehicles after the predetermined period is determined, Calculate the ratio of vehicles among the vehicles in the region whose risk index included in the risk state is equal to or higher than a predetermined threshold for each region, Generate a risk map associating the region and the ratio. With this configuration, it is possible to generate a risk map capable of grasping in which region the ratio of vehicles equipped with tires having a high risk index is high.

[0015] (8) The tire management device according to an embodiment of the present disclosure is the tire management device according to any one of (1) to (7) above, The control unit transmits the risk map to a first terminal device owned by the user of the vehicle. With this configuration, the user of the vehicle can grasp the extent to which the ratio of vehicles equipped with tires having a high risk index is in their residential area.

[0016] (9) The tire management device according to an embodiment of the present disclosure is the tire management device according to any one of (1) to (8) above, The control unit transmits the risk map to a second terminal device owned by a tire dealer. With this configuration, the tire dealer can utilize the risk map as information for giving safety guidance to the user or provide maintenance information to the user.

[0017] (10) A program according to an embodiment of the present disclosure is for a tire management device, to obtain information on the internal pressure of a tire mounted on a vehicle, to obtain information on the remaining groove amount of the tire, to obtain temperature information after a predetermined period, to estimate the internal pressure of the tire after the predetermined period based on the internal pressure information and the temperature information, to calculate a first performance index that the internal pressure of the tire after the predetermined period gives to grip performance and braking performance based on the estimated internal pressure of the tire after the predetermined period, Based on the remaining tread depth of the tire, a second performance index is calculated that the remaining tread depth of the tire has an effect on grip performance and braking performance. Based on the first performance indicator and the second performance indicator, the risk status of the tire after the predetermined period is determined, Perform an action that includes this. This configuration allows for a highly accurate assessment of the tire's risk level.

[0018] (11) A tire management method according to one embodiment of the present disclosure is A tire management method in a tire management device, To obtain information on the internal pressure of the tires installed in the vehicle, To obtain information on the remaining tread depth of the aforementioned tire, To obtain temperature information after a specified period, Estimating the internal pressure of the tire after a predetermined period based on the internal pressure information and the temperature information, Based on the estimated internal pressure of the tire after the predetermined period, a first performance index is calculated that the internal pressure of the tire has on grip performance and braking performance after the predetermined period. Based on the remaining tread depth of the tire, a second performance index is calculated that the remaining tread depth of the tire has an effect on grip performance and braking performance. Based on the first performance indicator and the second performance indicator, the risk status of the tire after the predetermined period is determined, Includes. This configuration allows for a highly accurate assessment of the tire's risk level. [Effects of the Invention]

[0019] This disclosure provides a tire management device, program, and tire management method that enable accurate determination of the risk level of a tire. [Brief explanation of the drawing]

[0020] [Figure 1]This figure shows the configuration of a tire management system including a tire management device according to one embodiment of the present disclosure. [Figure 2] This is a block diagram showing the configuration of a tire management device according to one embodiment of the present disclosure. [Figure 3] This flowchart shows an example of the operation of a tire management device according to one embodiment of the present disclosure. [Figure 4] This figure shows an example of how to divide a region when generating a risk map. [Modes for carrying out the invention]

[0021] Hereinafter, one embodiment of the present disclosure will be described with reference to the drawings.

[0022] Figure 1 is a diagram showing the configuration of a tire management system 1 including a tire management device 10 according to one embodiment of the present disclosure.

[0023] The tire management system 1 comprises a tire management device 10, a vehicle 20, a first terminal device 30, a second terminal device 40, and a weather server 50. The tire management device 10, the vehicle 20, the first terminal device 30, the second terminal device 40, and the weather server 50 are communicated with each other via a network 60. The network 60 may include a mobile communication network and the internet.

[0024] The tire management device 10 is, for example, a dedicated computer configured to function as a server. The tire management device 10 may also be a general-purpose PC (Personal Computer).

[0025] Vehicle 20 is equipped with tires 21. Tires 21 are the tires that the tire management device 10 manages. The tire management device 10 can determine the risk status of tires 21. Details of the process by which the tire management device 10 determines the risk status of tires 21 will be described later.

[0026] Vehicle 20 may be any type of vehicle. For example, vehicle 20 may be a passenger car, truck, bus, construction vehicle, etc. Although Figure 1 shows one vehicle 20, the tire management system 1 may be equipped with multiple vehicles 20.

[0027] The first terminal device 30 is a terminal device owned by the user of the vehicle 20. The first terminal device 30 may be, for example, a smartphone or a tablet.

[0028] The second terminal device 40 is a terminal device owned by a tire company. A tire company is a business that sells and maintains tires. The second terminal device 40 is operated by an employee of the tire company. The second terminal device 40 may be a general-purpose PC, smartphone, or tablet.

[0029] The weather server 50 is a server that provides weather-related information. The tire management device 10 can obtain weather-related information from the weather server 50.

[0030] Before describing the details of the operation of the tire management device 10, the configuration of the tire management device 10 according to one embodiment of the present disclosure will be described with reference to Figure 2.

[0031] The tire management device 10 comprises a communication unit 11, a storage unit 12, an input unit 13, an output unit 14, and a control unit 15.

[0032] The communication unit 11 includes a communication module that connects to the network 60. For example, the communication unit 11 may include a communication module that supports a LAN (Local Area Network). In one embodiment, the tire management device 10 is connected to the network 60 via the communication unit 11. The communication unit 11 transmits and receives various information via the network 60. The communication unit 11 can communicate with the vehicle 20, the first terminal device 30, the second terminal device 40, and the weather server 50 via the network 60.

[0033] The storage unit 12 is, for example, a semiconductor memory, magnetic memory, or optical memory, but is not limited to these. The storage unit 12 may function as, for example, a main memory, an auxiliary memory, or a cache memory. The storage unit 12 stores any information used in the operation of the tire management device 10. For example, the storage unit 12 may store system programs, application programs, and various information received by the communication unit 11. The information stored in the storage unit 12 may be updatable with information received from the network 60 via the communication unit 11, for example. Part of the storage unit 12 may be installed outside the tire management device 10. In that case, the part of the storage unit 12 installed outside may be connected to the tire management device 10 via any interface.

[0034] The input unit 13 includes one or more input interfaces that detect user input and acquire input information based on user operations. For example, the input unit 13 includes, but is not limited to, physical keys, capacitive keys, a touchscreen integrated with the display of the output unit 14, or a microphone that accepts voice input.

[0035] The output unit 14 includes one or more output interfaces for outputting information and notifying the user. For example, the output unit 14 includes, but is not limited to, a display for outputting information as an image, a speaker for outputting information as sound, etc.

[0036] The control unit 15 includes at least one processor, at least one dedicated circuit, or a combination thereof. The processor is a general-purpose processor such as a CPU (Central Processing Unit) or GPU (Graphics Processing Unit), or a dedicated processor specialized for a specific process. The dedicated circuit is, for example, an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit). The control unit 15 controls each part of the tire management device 10 and executes processes related to the operation of the tire management device 10.

[0037] (Operation of the tire management device) Next, we will explain the operation of the tire management device 10.

[0038] Vehicle 20 is equipped with a system for monitoring the condition of the tires 21. Vehicle 20 may, for example, be equipped with a Tire Pressure Monitoring System (TPMS).

[0039] The vehicle 20 transmits information about the internal pressure of the tire 21 and information about the temperature of the tire 21 to the tire management device 10 at predetermined intervals.

[0040] The communication unit 11 of the tire management device 10 receives information on the internal pressure of the tire 21 and the temperature of the tire 21 transmitted by the vehicle 20. The control unit 15 acquires the information on the internal pressure of the tire 21 and the temperature of the tire 21 transmitted by the vehicle 20 via the communication unit 11.

[0041] The control unit 15 of the tire management device 10 acquires temperature information from the weather server 50 for a predetermined period of time. The predetermined period may be a period set according to the timing at which the internal pressure of the tire 21 is to be estimated. For example, if the internal pressure of the tire 21 is to be estimated 3 days later, the predetermined period may be 3 days. Also, for example, if the internal pressure of the tire 21 is to be estimated 1 week later, the predetermined period may be 1 week. Also, for example, if the internal pressure of the tire 21 is to be estimated 1 month later, the predetermined period may be 1 month.

[0042] When the control unit 15 obtains temperature information from the weather server 50 for a predetermined period of time, it may obtain temperature information for the region including the storage location of the vehicle 20. For example, if the storage location of the vehicle 20 is in Tokyo, the control unit 15 may obtain temperature information for Tokyo for a predetermined period of time.

[0043] The control unit 15 may acquire location information of the vehicle 20 and estimate the storage location of the vehicle 20 based on the acquired location information. In this case, the location information of the vehicle 20 may be, for example, location information detected by the vehicle 20 by the GPS (Global Positioning System) installed in the vehicle 20. Alternatively, the control unit 15 may estimate the storage location of the vehicle 20 as the location where the vehicle 20 has stayed the longest, among the location information of the vehicle 20.

[0044] The control unit 15 estimates the internal pressure of the tire 21 after a predetermined period based on the internal pressure information of the tire 21 obtained from the vehicle 20 and the temperature information after a predetermined period obtained from the weather server 50. The internal pressure information of the tire 21 may be, for example, trend information based on the change in internal pressure of the tire 21. For example, if the temperature after the predetermined period is high and the decrease in internal pressure trend due to temperature change is predicted to be smaller than the increase in internal pressure due to temperature change, the internal pressure of the tire 21 after the predetermined period will be high. Also, if the temperature after the predetermined period is low, the internal pressure of the tire 21 after the predetermined period will be low.

[0045] The control unit 15 estimates the internal pressure of the tire 21 after a predetermined period, and based on the estimated internal pressure of the tire 21 after the predetermined period, calculates a first performance index that the internal pressure of the tire 21 has on grip performance and braking performance after the predetermined period. The first performance index may be, for example, an index that shows by what percentage the grip performance decreases according to the internal pressure of the tire 21, and by what percentage the braking performance decreases according to the internal pressure of the tire 21.

[0046] The memory unit 12 stores a first relational expression that associates the internal pressure of the tire 21 with a first performance indicator. The first relational expression may be in any format that allows the internal pressure of the tire 21 to be associated with the first performance indicator. The first relational expression may be, for example, a function or in table format.

[0047] When calculating the first performance index, the control unit 15 refers to the first relational expression stored in the memory unit 12 and calculates the first performance index based on the estimated internal pressure of the tire 21 after a predetermined period.

[0048] The user of vehicle 20 transmits information about the remaining tread depth of the vehicle's tires 21 to the tire management device 10 by operating the first terminal device 30. The user of vehicle 20 may, for example, transmit information about the remaining tread depth of the tires 21 to the tire management device 10 via an application installed on the first terminal device 30.

[0049] The user of vehicle 20 may measure the remaining tread depth of the vehicle 20's tires 21 by various methods. For example, the user can measure the remaining tread depth of the tires 21 using a tread gauge. Alternatively, the user can measure the remaining tread depth of the tires 21 using an automatic tire tread depth measuring device installed at a gas station or parking lot. Furthermore, the user can measure the remaining tread depth of the tires 21 using software that takes a photograph of the tires 21 and calculates the remaining tread depth from the image.

[0050] The communication unit 11 of the tire management device 10 receives information on the remaining tread depth of the tire 21 transmitted by the first terminal device 30. The control unit 15 acquires the information on the remaining tread depth of the tire 21 transmitted by the first terminal device 30 via the communication unit 11.

[0051] The control unit 15 of the tire management device 10 calculates a second performance index that the remaining tread depth of the tire 21 has on grip performance and braking performance, based on the information on the remaining tread depth of the tire 21 obtained from the first terminal device 30. The second performance index may be, for example, an index that shows by what percentage the grip performance decreases according to the remaining tread depth of the tire 21, and by what percentage the braking performance decreases according to the remaining tread depth of the tire 21.

[0052] The memory unit 12 stores a second relational expression that associates the remaining tread depth of the tire 21 with a second performance indicator. The second relational expression may be in any format that allows the remaining tread depth of the tire 21 to be associated with the second performance indicator. The second relational expression may be, for example, a function or a table.

[0053] When calculating the second performance index, the control unit 15 refers to the second relational expression stored in the memory unit 12 and calculates the second performance index based on the remaining tread depth of the tire 21.

[0054] When the control unit 15 calculates the first performance index and the second performance index, it determines the risk status of the tire 21 after a predetermined period based on the calculated first and second performance indexes.

[0055] The risk status of tire 21 may include, for example, risk indicators and the nature of the risk. The risk indicators included in the risk status of tire 21 may be numerical values ​​that represent the degree of risk of tire 21. The risk indicators may be, for example, five-level ratings that represent the degree of risk of tire 21. Alternatively, the risk indicators may be, for example, percentages that represent the degree of risk of tire 21.

[0056] The risk associated with the risk condition of tire 21 may be expressed in words, for example. For example, if the internal pressure of tire 21 is low, the risk may be "difficulty draining water," "heavier steering," or "risk of bursting." For example, if the internal pressure of tire 21 is high, the risk may be "increased braking distance." For example, if the remaining tread depth of tire 21 is low, the risk may be "overall reduced wet performance."

[0057] The memory unit 12 stores a database that associates the first and second performance indicators with risk conditions. The database that associates the first and second performance indicators with risk conditions may be in any format. For example, the database that associates the first and second performance indicators with risk conditions may be in a table format.

[0058] When the control unit 15 determines the risk status of the tire 21 after a predetermined period, it refers to the database stored in the storage unit 12 and determines the risk status of the tire 21 after the predetermined period based on the first performance indicator and the second performance indicator.

[0059] When the control unit 15 determines the risk status of the tire 21 after a predetermined period, it transmits the risk status of the tire 21 after the predetermined period to the first terminal device 30 via the communication unit 11. This allows the user of the vehicle 20 on which the tire 21 is installed to be aware of the risk status of the tire 21 after the predetermined period.

[0060] If the risk indicators included in the risk status of the tire 21 after a predetermined period are above a predetermined threshold, the control unit 15 may transmit maintenance suggestion information, along with the risk status of the tire 21 after a predetermined period, to the first terminal device 30 via the communication unit 11. The maintenance suggestion information may include, for example, information suggesting that the internal pressure of the tire 21 be increased by a predetermined period, information suggesting that the internal pressure of the tire 21 be decreased by a predetermined period, or information suggesting that the tire 21 be replaced by a predetermined period. This allows the user of the vehicle 20 on which the tire 21 is installed to understand how to maintain the tire 21 by a predetermined period.

[0061] An example of the operation of the tire management device 10 will be explained with reference to the flowchart shown in Figure 3.

[0062] Step S101: The control unit 15 of the tire management device 10 acquires information on the internal pressure of the tires 21 from the vehicle 20.

[0063] Step S102: The control unit 15 obtains temperature information from the weather server 50 after a predetermined period.

[0064] Step S103: The control unit 15 estimates the internal pressure of the tire 21 after a predetermined period based on the internal pressure information of the tire 21 obtained from the vehicle 20 and the temperature information after a predetermined period obtained from the weather server 50.

[0065] Step S104: The control unit 15 estimates the internal pressure of the tire 21 after a predetermined period, and based on the estimated internal pressure of the tire 21 after the predetermined period, calculates a first performance index that the internal pressure of the tire 21 has on grip performance and braking performance after the predetermined period.

[0066] Step S105: The control unit 15 obtains information on the remaining tread depth of the tire 21 from the first terminal device 30.

[0067] Step S106: The control unit 15 calculates a second performance index that the remaining tread depth of the tire 21 has on grip performance and braking performance, based on the information on the remaining tread depth of the tire 21 obtained from the first terminal device 30.

[0068] Step S107: The control unit 15 calculates the first performance index and the second performance index, and then determines the risk status of the tire 21 after a predetermined period based on the calculated first performance index and the second performance index.

[0069] Step S108: When the control unit 15 determines the risk status of the tire 21 after a predetermined period, it transmits the risk status of the tire 21 after the predetermined period to the first terminal device 30.

[0070] Steps S105 to S106 described above may be executed before step S101. Alternatively, steps S105 to S106 described above may be executed in parallel with steps S101 to S104.

[0071] <Generating a Risk Map> The control unit 15 of the tire management device 10 may determine the risk status of the tires 21 of multiple vehicles 20 after a predetermined period of time.

[0072] The control unit 15 determines the risk status of multiple vehicles 20 after a predetermined period, and calculates the percentage of vehicles 20 in each region whose risk indicators included in the risk status are above a predetermined threshold.

[0073] The regions can be divided in any way you like, but for example, they can be divided into Hokkaido, Tohoku, Kanto, Chubu, Kinki, Chugoku, and Kyushu. Figure 4 shows an example where the regions are divided into Hokkaido 201, Tohoku 202, Kanto 203, Chubu 204, Kinki 205, Chugoku 206, Shikoku 207, and Kyushu 208. Note that this is just one example, and the regions can also be divided by prefecture, or by city, town, or village.

[0074] The control unit 15 calculates the percentage of vehicles 20 whose risk indicator is above a predetermined threshold for each region, and then generates a map that associates the region with the calculated percentage. Hereafter, the map that associates the region with the percentage of vehicles 20 whose risk indicator is above a predetermined threshold will be referred to as the "risk map".

[0075] When the control unit 15 generates a risk map, it transmits the generated risk map to the first terminal device 30 via the communication unit 11. This allows the user of the vehicle 20 to understand the contents of the risk map. For example, if a user living in the Kanto region 203 receives the risk map and learns that after a predetermined period of time, the proportion of vehicles 20 in the Kanto region 203 with high risk indicators is high, the user can drive their vehicle 20 carefully, for example, by maintaining a wider following distance, to avoid being involved in an accident with another person's vehicle 20.

[0076] Furthermore, once the control unit 15 generates a risk map, it transmits the generated risk map to a second terminal device 40 owned by the tire shop via the communication unit 11. This allows the tire shop that owns the second terminal device 40 to understand the contents of the risk map. For example, if a tire shop based in Kanto region 203 receives the risk map and learns that after a predetermined period, a high percentage of vehicles 20 in Kanto region 203 have high risk indicators, the tire shop can use this information when providing safety guidance to users or providing maintenance information to users.

[0077] As described above, in the tire management device 10 according to this embodiment, the control unit 15 acquires information on the internal pressure of the tire 21 mounted on the vehicle 20, acquires information on the remaining tread depth of the tire 21, acquires information on the temperature after a predetermined period, estimates the internal pressure of the tire 21 after a predetermined period based on the internal pressure information and the temperature information, calculates a first performance index that the internal pressure of the tire 21 after a predetermined period affects the grip performance and braking performance based on the estimated internal pressure of the tire 21 after a predetermined period, calculates a second performance index that the remaining tread depth of the tire 21 affects the grip performance and braking performance based on the remaining tread depth of the tire 21, and determines the risk status of the tire 21 after a predetermined period based on the first and second performance indexes. In this way, the tire management device 10 according to this embodiment can accurately determine the risk status of the tire 21 because it determines the risk status of the tire 21 based on two performance indexes: a first performance index calculated based on the internal pressure of the tire 21 and a second performance index calculated based on the remaining tread depth of the tire 21.

[0078] Furthermore, the tire management device 10 according to this embodiment estimates the internal pressure of the tire 21 after a predetermined period based on information about the internal pressure of the tire 21 and information about the temperature after a predetermined period. Therefore, it can accurately estimate the internal pressure of the tire 21 after a predetermined period, taking into account the temperature after that period. Accordingly, the tire management device 10 according to this embodiment can accurately determine the degree of risk of the tire 21 after a predetermined period, taking into account the temperature after that period.

[0079] While embodiments of this disclosure have been described based on the drawings and examples, it should be noted that those skilled in the art will find it easy to make various modifications or alterations based on this disclosure. Therefore, it should be noted that these modifications or alterations are included within the scope of this disclosure. For example, the functions included in each component or step can be rearranged in a logically consistent manner, and multiple components or steps can be combined into one or divided. Embodiments relating to this disclosure can also be realized as storage media recording programs executed by a processor in the device. It should be understood that these are also included within the scope of this disclosure.

[0080] For example, it is also possible to configure a general-purpose electronic device such as a computer or smartphone to function as the tire management device 10 according to the above embodiment. Specifically, a program describing the processing content that realizes each function of the tire management device 10 according to the embodiment can be stored in the memory of the electronic device, and the electronic device's processor can read and execute the program. Therefore, the disclosure according to one embodiment can also be realized as a program that can be executed by a processor.

[0081] For example, in the embodiment described above, an example was shown in which the tire management device 10 acquires information on the remaining tread depth of the tire 21 from the first terminal device 30, but this is just one example. The tire management device 10 may acquire information on the remaining tread depth of the tire 21 from a device other than the first terminal device 30.

[0082] For example, in the embodiment described above, the storage location of the vehicle 20 was estimated based on the location information of the vehicle 20 detected by the GPS installed in the vehicle 20. However, the tire management device 10 may store information about the storage location of the vehicle 20 in advance. In this case, the storage location of the vehicle 20 may be, for example, the address of the vehicle 20's user. Contribution to the United Nations-led Sustainable Development Goals (SDGs)

[0083] The SDGs have been proposed to realize a sustainable society. One embodiment of this disclosure is considered to be a technology that can contribute to "No. 3 Good Health and Well-being," "No. 12 Responsible Consumption and Production," and "No. 13 Climate Action." [Explanation of Symbols]

[0084] 1. Tire Management System 10 Tire management device 11 Communications Department 12 Storage section 13 Input section 14 Output section 15 Control Unit 20 vehicles 21 Tires 30 First terminal device 40 Second terminal device 50 Weather Servers 60 Networks

Claims

1. The system obtains information on the internal pressure of the tires mounted on the vehicle. The information on the remaining tread depth of the aforementioned tire is obtained, Obtain temperature information after a specified period, Based on the internal pressure information and the temperature information, the internal pressure of the tire after the predetermined period is estimated. Based on the estimated internal pressure of the tire after the predetermined period, a first performance index is calculated that the internal pressure of the tire has on grip performance and braking performance after the predetermined period. Based on the remaining tread depth of the tire, a second performance index is calculated that the remaining tread depth of the tire has an effect on grip performance and braking performance. A control unit determines the risk status of the tire after a predetermined period based on the first performance indicator and the second performance indicator. A tire management device equipped with the following features.

2. In the tire management device according to claim 1, The control unit is a tire management device that transmits the risk status to a first terminal device owned by the user of the vehicle.

3. In the tire management device according to claim 2, The control unit transmits maintenance suggestion information to the first terminal device when the risk indicator included in the risk state is above a predetermined threshold, thereby providing a tire management device.

4. In the tire management device according to claim 1, Equipped with additional memory, The aforementioned storage unit is A first relational expression that relates the internal pressure of the tire to the first performance index, A second relational expression relating the remaining tread depth of the tire to the second performance index, A tire management device that stores the tires.

5. In the tire management device according to claim 4, The storage unit stores a database that associates the first performance indicator and the second performance indicator with the risk status, in a tire management device.

6. In the tire management device according to claim 1, The control unit, The location information of the vehicle is acquired, and the storage location of the vehicle is estimated based on the acquired location information. A tire management device that acquires temperature information for the region including the estimated storage location.

7. In the tire management device according to claim 1, The control unit, The risk status of the tires of multiple vehicles after the predetermined period is determined, For each region, calculate the percentage of vehicles in that region whose risk indicators included in the aforementioned risk status are above a predetermined threshold. A tire management device that generates a risk map relating the aforementioned region to the aforementioned percentage.

8. In the tire management device according to claim 7, The control unit is a tire management device that transmits the risk map to a first terminal device owned by the user of the vehicle.

9. In the tire management device according to claim 7, The control unit is a tire management device that transmits the risk map to a second terminal device owned by the tire company.

10. In the tire management device, To obtain information on the internal pressure of the tires installed in the vehicle, To obtain information on the remaining tread depth of the aforementioned tire, To obtain temperature information after a specified period, Estimating the internal pressure of the tire after a predetermined period based on the internal pressure information and the temperature information, Based on the estimated internal pressure of the tire after the predetermined period, a first performance index is calculated that the internal pressure of the tire has on grip performance and braking performance after the predetermined period. Based on the remaining tread depth of the tire, a second performance index is calculated that the remaining tread depth of the tire has an effect on grip performance and braking performance. Based on the first performance indicator and the second performance indicator, the risk status of the tire after the predetermined period is determined, A program that performs an action that includes the following:

11. A tire management method in a tire management device, To obtain information on the internal pressure of the tires installed in the vehicle, To obtain information on the remaining tread depth of the aforementioned tire, To obtain temperature information after a specified period, Estimating the internal pressure of the tire after a predetermined period based on the internal pressure information and the temperature information, Based on the estimated internal pressure of the tire after the predetermined period, a first performance index is calculated that the internal pressure of the tire has on grip performance and braking performance after the predetermined period. Based on the remaining tread depth of the tire, a second performance index is calculated that the remaining tread depth of the tire has an effect on grip performance and braking performance. Based on the first performance indicator and the second performance indicator, the risk status of the tire after the predetermined period is determined, Tire management methods, including those mentioned above.

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