Tire air pressure management system and tire air pressure management method

Abstract

To provide a tire air pressure management system and a tire air pressure management method which can notify outside of alert information at an appropriate timing, and thereby can improve convenience of management of a tire air pressure.SOLUTION: A tire air pressure management system 100 includes an information acquisition part 32, an alert generation part 33 and an alert notification part 34. The information acquisition part 32 acquires information on a tire air pressure measured by a sensor 10 arranged on a tire 1. The alert generation part 33 generates alert information, when a tire air pressure acquired by the information acquisition part 32 is less than a first threshold smaller than an appropriate value of the tire air pressure. The alert notification part 34 notifies outside that the alert information has been generated by the alert generation part 33 during a predetermined period, after elapse of the predetermined period.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a tire pressure management system and a tire pressure management method for managing tires mounted on a vehicle. [Background technology]

[0002] Tires mounted on a vehicle are set to an appropriate air pressure, and if the air pressure drops, the tires are filled with air as part of maintenance so that the appropriate air pressure is restored.

[0003] Patent Document 1 describes a conventional tire management method. A tire management server used in this tire management method is connected to a vehicle terminal, a vehicle management terminal, and a dealer terminal via a communication network. The tire management server receives data indicating the tire condition from the vehicle terminal or the dealer terminal, judges the tire condition based on this data, and if it is determined that urgent attention is required for the tire, it notifies the vehicle terminal and the dealer terminal of the dealer that can handle the condition of the tire. If it is determined that some kind of attention is required for the tire but not urgent, it performs a scheduling process for the vehicle management terminal of the vehicle and the dealer terminal of the specified dealer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-132994 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the tire management method described in Patent Document 1, axle arrangement and information related to maintenance (air pressure, etc.) are displayed on a vehicle terminal, and a maintenance plan is made based on notifications from the vehicle terminal to a dealer. However, when tire pressure fluctuates due to vehicle driving, temperature, etc., and alert information is generated frequently, there is a problem that the notifications are sent frequently to the user, which is irritating. The present inventors thought that there is room for improving the convenience of tire pressure management by notifying generated alert information at an appropriate time when managing tire pressure of vehicles operated and managed by users such as transportation companies.

[0006] The present invention has been made in consideration of the above circumstances, and its object is to provide a tire pressure management system and a tire pressure management method that can improve the convenience of managing tire pressure by notifying alert information at an appropriate time. [Means for solving the problem]

[0007] A tire pressure management system according to one embodiment of the present invention is characterized in that it comprises an information acquisition unit that acquires information on tire pressure measured by a sensor provided in a tire, an alert generation unit that generates alert information when the tire pressure acquired by the information acquisition unit is less than a first threshold value that is lower than an appropriate tire pressure value, and an alert notification unit that notifies an outside party after a predetermined period has elapsed that alert information has been generated by the alert generation unit during the predetermined period.

[0008] Another aspect of the present invention is a tire pressure management method, which includes an information acquisition step of acquiring information on the tire pressure measured by a sensor disposed in a tire, an alert generation step of generating alert information when the tire pressure acquired by the information acquisition step is less than a first threshold value that is lower than an appropriate tire pressure value, and an alert notification step of notifying an outside device after a predetermined period of time has elapsed that the alert information has been generated by the alert generation step during the predetermined period of time. Effect of the Invention

[0009] According to the present invention, the convenience of managing tire pressure can be improved by notifying alert information at an appropriate time. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing an overall configuration of a tire pressure management system according to an embodiment; [Diagram 2] 2 is a block diagram showing a functional configuration of the tire pressure management device; FIG. [Diagram 3] 4 is a flowchart showing the procedure of an alert generation process performed by the tire pressure management system. [Figure 4] 4 is a schematic diagram showing an example of a screen display of tire pressure and tire temperature by a display unit. FIG. [Diagram 5] FIG. 2 is a schematic diagram showing an example of a screen display of tire pressure and tire temperature in one vehicle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The present invention will be described below based on a preferred embodiment with reference to Figures 1 to 5. The same or equivalent components and members shown in each drawing are given the same reference numerals, and duplicated explanations will be omitted as appropriate. Furthermore, the dimensions of the members in each drawing are enlarged or reduced as appropriate for ease of understanding. Furthermore, some of the members that are not important for explaining the embodiment are omitted in each drawing.

[0012] (Embodiment) 1 is a schematic diagram showing the overall configuration of a tire pressure management system 100 according to an embodiment. The tire pressure management system 100 includes a sensor 10, a vehicle measurement device 20, a tire pressure management device 30, and a user terminal device 40. The tire pressure management system 100 collects and manages information on the air pressure and temperature of the tires 1 measured by the sensors 10 disposed in each tire 1 mounted on a vehicle 7. The vehicle 7 is, for example, a transport truck or the like whose operation is managed by a transport company or the like. The vehicle 7 is equipped with a plurality of tires 1.

[0013] The tire pressure management device 30 of the tire pressure management system 100 compares the actually measured tire 1 pressure with the appropriate tire pressure value and a set threshold value, and generates alert information. The tire pressure management device 30 notifies the generated alert information to the outside depending on the situation.

[0014] The tire pressure management device 30 notifies the outside of the alert information by displaying the alert information on a display device that the device itself has. The user visually recognizes the alert information displayed on the display device and becomes aware of the alert information. The tire pressure management device 30 also notifies the outside of the alert information by sending an e-mail or the like containing the alert information to the user. The user receives the e-mail or the like by the user terminal device 40 and becomes aware of the alert information.

[0015] The user becomes aware of the alert information notified to the outside by the tire pressure management device 30 and plans maintenance for the tires 1 mounted on the vehicle 7. Maintenance for the tires 1 includes, for example, filling the tires 1 with air to increase the air pressure therein and replacing the tires 1. The tire pressure management system 100 improves the convenience of managing tire pressure by notifying the alert information from the tire pressure management device 30 at an appropriate time.

[0016] 2 is a block diagram showing the functional configuration of the tire pressure management device 30. The sensor 10 includes a pressure sensor 11 and a temperature sensor 12 disposed in the tire 1. The pressure sensor 11 measures the tire pressure. The temperature sensor 12 measures the tire temperature. The pressure sensor 11 and the temperature sensor 12 are disposed in, for example, an air valve of the tire 1. The temperature sensor 12 may be disposed directly in the tire 1 to accurately measure the temperature of the tire 1.

[0017] The vehicle measurement device 20 accumulates the tire pressure and tire temperature measured by the sensor 10 and transmits them to the tire pressure management device 30 via the communication network 8. The sensor 10 starts measuring the tire pressure and tire temperature when the engine of the vehicle 7 starts.

[0018] The vehicle measurement device 20 stores the tire pressure and tire temperature measured by the sensor 10 during the period from when the engine of the vehicle 7 is started until the engine is stopped while the vehicle 7 is running, and transmits the stored tire pressure and tire temperature to the tire pressure management device 30. The vehicle measurement device 20 transmits the stored tire pressure and tire temperature to the tire pressure management device 30, for example, every few minutes to every tens of minutes. The time interval at which the vehicle measurement device 20 transmits the tire pressure and tire temperature to the tire pressure management device 30 is not limited to every few minutes to every tens of minutes. The tire pressure and tire temperature information transmitted from the vehicle measurement device 20 to the tire pressure management device 30 also includes information on the mounting position of each tire on the vehicle axle arrangement for which the information was measured.

[0019] The tire pressure management device 30 has a communication unit 31, an information acquisition unit 32, an alert generation unit 33, an alert notification unit 34, a display unit 35, and a memory unit 36. Each unit in the tire pressure management device 30 can be realized in hardware terms by electronic processing circuits consisting of electronic elements such as a computer CPU, or mechanical parts, and in software terms by computer programs, but here, functional blocks realized by the cooperation of these are depicted. Therefore, it will be understood by those skilled in the art that these functional blocks can be realized in various forms by combining hardware and software.

[0020] The communication unit 31 is connected to the communication network 8 by wireless or wired communication, and communicates with the vehicle measurement device 20. The information acquisition unit 32 acquires tire pressure and tire temperature information transmitted by the vehicle measurement device 20 via the communication unit 31. The tire pressure and tire temperature information acquired by the information acquisition unit 32 is assumed to be associated with vehicle identification information. The information acquisition unit 32 stores the acquired tire pressure and tire temperature information in the memory unit 36. The information acquisition unit 32 also outputs the acquired tire pressure information to the alert generation unit 33.

[0021] The storage unit 36 ​​is a storage device configured by, for example, an SSD (Solid State Drive), a hard disk, a CD-ROM, a DVD, etc. The storage unit 36 ​​stores vehicle management information 36a, sensor measurement information 36b, and alert-related information 36c.

[0022] The vehicle management information 36a is information about a plurality of vehicles managed by, for example, a transportation company, and includes the vehicle name, vehicle identification information given to each vehicle, and axle arrangement information. The axle arrangement information includes information on the mounting position of tires on the axle arrangement. The sensor measurement information 36b is information on tire pressure and tire temperature acquired by the information acquisition unit 32 corresponding to each vehicle included in the vehicle management information 36a. The sensor measurement information 36b includes information on the date and time when the tire pressure and tire temperature were measured. The alert-related information 36c is generated by the alert generation unit 33 and stored in the storage unit 36.

[0023] The alert generating unit 33 generates alert information when the tire pressure acquired by the information acquiring unit 32 is less than a first threshold value that is less than the appropriate tire pressure value. The alert generating unit 33 also generates priority alert information when the tire pressure acquired by the information acquiring unit is less than a second threshold value that is less than the first threshold value.

[0024] The optimum tire pressure is set to a value that allows the tire to perform at its best, taking into consideration the tire specifications, the weight of the vehicle 7, and the like. The tire 1 is filled with air so that the tire pressure falls within a predetermined range with the optimum value at the center. The first threshold value is set to a value smaller than the optimum tire pressure.

[0025] The first threshold value is set to a value equal to or lower than the lower limit of a predetermined range whose center is an appropriate value to be considered when filling the tire 1 with air. The first threshold value is set to a value indicating that the tire pressure has dropped beyond the appropriate range. The first threshold value may also be set based on a rate of decrease in the vehicle's fuel efficiency. A tire pressure that reduces the vehicle's fuel efficiency to, for example, 80% of the fuel efficiency when the tire pressure is at an appropriate value is calculated and set as the first threshold value. The decrease in fuel efficiency due to tire pressure is calculated based on, for example, an increase in road friction caused by a decrease in tire pressure.

[0026] The second threshold is set to a value smaller than the first threshold. The second threshold is set to a value indicating that the tire air pressure has dropped significantly and that the tire 1 is unable to travel on a vehicle. If air has leaked out due to damage to the rubber material of the tire 1, a decrease in the sealing performance of the air valve, a decrease in adhesion between the tire and the wheel, or the like, the tire 1 is unable to travel on a vehicle. In addition, if air leaks naturally from the tire 1, the tire 1 is unable to travel on a vehicle.

[0027] In addition, a tire pressure at which the fuel efficiency of the vehicle decreases to, for example, 70% of the fuel efficiency when the tire pressure is at an appropriate value may be calculated and used as the second threshold value. The rate of decrease in fuel efficiency corresponding to the first threshold value and the second threshold value is not limited to the above example, and may be set based on individual circumstances such as the track record of past tire pressure maintenance by the transportation company.

[0028] For example, if the optimum tire pressure (median) is 900 KPa, the first threshold is set to 800 KPa and the second threshold is set to 750 KPa. The optimum tire pressure, the first threshold, and the second threshold are not limited to this example. In order to improve fuel economy, if alert information is generated when the decrease in tire pressure is small, the first threshold may be set to a higher value such as 850 KPa.

[0029] As described above, the alert information is generated when the tire pressure drops below the first threshold. When the tire pressure drops below the second threshold, the priority alert information is generated, so the alert information is generated when the tire pressure is less than the first threshold and equal to or greater than the second threshold. The alert information is generated when there is little need to perform immediate maintenance such as tire inspection or tire filling with air, and alerts the user to take caution. The alert information may include information indicating a "caution state." The priority alert information is generated when there is need to perform immediate maintenance such as tire inspection or tire filling with air, and alerts the user to take caution. The priority alert information may include information indicating a "danger state" or a "warning state."

[0030] The alert generation unit 33 outputs the generated alert information and priority alert information to the storage unit 36. The alert information and priority alert information include corresponding information such as the date and time when the tire pressure was measured, the date and time when each information was generated, and vehicle identification information. The alert information and priority alert information also include information on the mounting position on the axle arrangement of the tire with low tire pressure. The alert information includes information indicating a "caution state", and the priority alert information includes information indicating a "danger state" or a "warning state". The storage unit 36 ​​stores the alert information and priority alert information input from the alert generation unit 33 as alert-related information 36c for each vehicle.

[0031] Furthermore, when the alert generating unit 33 generates priority alert information, the alert generating unit 33 outputs the priority alert information to the alert notifying unit .

[0032] The alert notification unit 34 notifies users including the driver of the corresponding vehicle and the operator who manages the operation of the vehicle of the alert information generated by the alert generation unit 33 during the predetermined period after the predetermined period has elapsed. The predetermined period is, for example, one day, from 8:00 a.m. on one day to 8:00 a.m. on the next day. In this case, the predetermined period is the time when 8:00 a.m. on the next day has elapsed. The predetermined period is set to an arbitrary period in which the vehicle level does not decrease from the first threshold to the second threshold.

[0033] The alert notification unit 34 generates a single e-mail including the alert information generated during a predetermined period and sends it to the e-mail address of the user. The user receives the e-mail sent by the alert notification unit 34 using an application for sending and receiving e-mails in the tire pressure management device 30 and the user terminal device 40.

[0034] The user can obtain the alert information contained in the email. The user terminal device 40 receives the email sent by the alert notification unit 34 via the communication network 8. The user terminal device is an information processing device such as a smartphone or a personal computer.

[0035] When the priority alert information is input from the alert generation unit 33, the alert notification unit 34 notifies users including the driver of the corresponding vehicle and the operator who manages the operation of the vehicle of the priority alert information before a predetermined period of time has elapsed. When the priority alert information is input from the alert generation unit 33, the alert notification unit 34 may automatically generate and send an e-mail including the priority alert information immediately. The user can learn the priority alert information by receiving the e-mail.

[0036] Even if the tire pressure is less than the first threshold and equal to or greater than the second threshold, if the tire pressure drop rate is equal to or greater than a predetermined value within a predetermined period (e.g., one day), the alert generating unit 33 generates priority alert information instead of alert information. This is because if the tire pressure drop is large, the user is immediately notified of the priority alert information.

[0037] The alert notification unit 34 may output the priority alert information and the alert information to a display unit 35 included in the tire pressure management device 30, display them on the display unit 35, and notify the user. The display unit 35 includes a display device such as a liquid crystal display, and displays the priority alert information and the alert information input from the alert notification unit 34 on the display device.

[0038] The display unit 35 reads out the tire pressure information from the sensor measurement information 36b in the storage unit 36 ​​and displays it on the display device. The display unit 35 displays the change in tire pressure over a predetermined period (one day), for example, on the display device, thereby making the user aware of the change in tire pressure.

[0039] Next, the operation of the tire pressure management system 100 will be described. Fig. 3 is a flowchart showing the procedure of the alert generation process by the tire pressure management system 100. The information acquisition unit 32 of the tire pressure management device 30 acquires tire pressure and tire temperature information from the vehicle measurement device 20 (S1). The information acquisition unit 32 outputs the acquired tire pressure and tire temperature information to the memory unit 36 ​​for storage, and outputs the tire pressure information to the alert generation unit 33.

[0040] The alert generation unit 33 determines whether the tire pressure is equal to or greater than a first threshold (S2). If the tire pressure is equal to or greater than the first threshold (S2: YES) in step S2, the process ends. If the tire pressure is less than the first threshold (S2: NO) in step S2, the alert generation unit 33 determines whether the tire pressure is equal to or greater than a second threshold (S3).

[0041] In step S3, if the tire pressure is less than the second threshold (S3: NO), the alert generation unit 33 generates priority alert information (S4) and ends the process. The priority alert information generated by the alert generation unit 33 is output to the alert notification unit 34, which immediately notifies the user of the priority alert information.

[0042] In step S3, if the tire pressure is equal to or greater than the second threshold (S3: YES), the alert generator 33 determines whether the tire pressure drop rate is equal to or greater than a predetermined value (S5). In step S5, if the tire pressure drop rate is equal to or greater than a predetermined value (S5: YES), the alert generator 33 proceeds to step S4 to generate priority alert information and terminates the process.

[0043] In step S5, if the tire pressure drop rate is less than the predetermined value (S5: NO), the alert generation unit 33 generates alert information (S6) and ends the process. The alert generation unit 33 stores the alert information generated in step S6 in the memory unit 36 ​​as alert-related information 36c. The alert notification unit 34 reads the alert information generated by the alert generation unit 33 during a predetermined period from the alert-related information 36c stored in the memory unit 36, and notifies the user after the predetermined period has elapsed. The predetermined period is, for example, one day.

[0044] The tire pressure management system 100 stores the alert information generated by the alert generation unit 33 during a predetermined period in the storage unit 36, and after the predetermined period has elapsed, the alert information generated during the predetermined period is compiled into a single email and notified to the user. The tire pressure management system 100 prevents the user from being annoyed by being notified frequently every time alert information is generated, and can improve the convenience of managing tire pressure by notifying the user at an appropriate timing after the predetermined period has elapsed. By learning the alert information, the user can recognize that tire pressure is decreasing and that attention is required.

[0045] When the tire pressure is less than the second threshold, the tire pressure management system 100 generates priority alert information and notifies the user of the priority alert information before a predetermined period of time has elapsed. When the tire pressure is less than the second threshold, the tire pressure management system 100 may generate priority alert information and notify the user of the priority alert information immediately. When the tire pressure drops below the second threshold, the tire pressure management system 100 can inform the user that the tire pressure has dropped significantly before a predetermined period of time has elapsed or immediately.

[0046] Even if the tire pressure is less than the first threshold and equal to or greater than the second threshold, the tire pressure management system 100 generates priority alert information if the rate of decrease in tire pressure within a predetermined period is equal to or greater than a predetermined value. The tire pressure management system 100 can inform the user that the rate of decrease in tire pressure is large and that the tire pressure is decreasing rapidly.

[0047] The tire pressure management system 100 may set the first threshold value and the second threshold value based on a rate of decrease in fuel efficiency of the vehicle. This allows the tire pressure management system 100 to prompt the user to perform maintenance such as filling the tires 1 with air in order to improve fuel efficiency during vehicle travel.

[0048] The tire pressure management system 100 stores information on tire pressure and tire temperature as sensor measurement information 36b in the memory unit 36 ​​of the tire pressure management device 30. The display unit 35 reads out and displays the tire pressure information stored in the memory unit 36, thereby making it possible to provide the user with tire pressure information on a plurality of vehicles whose operation is managed in an easily understandable manner.

[0049] FIG. 4 is a schematic diagram showing an example of a screen display of tire pressure and tire temperature by the display unit 35. The display unit 35 displays the tire pressure and tire temperature status for a plurality of vehicles on the screen. If the tire pressure is equal to or higher than a first threshold, it is expressed as "proper", if it is less than the first threshold and equal to or higher than a second threshold, it is expressed as "caution", and if it is less than the second threshold, it is expressed as "danger". If information such as tire pressure from the sensor 10 cannot be received, a wording such as "signal not received" may be added to the display. Regarding tire temperature, if it is higher than a predetermined threshold that is equal to or higher than the proper temperature, it is displayed as "high temperature".

[0050] 5 is a schematic diagram showing an example of a screen display of tire pressure and tire temperature for one vehicle. The display unit 35 displays axle arrangement information for the vehicle and a graph of the tire pressure and tire temperature of a selected tire. The axle arrangement information indicates three axles A1, A2, and A3 in the longitudinal direction of the vehicle, and tire mounting positions B11, B12, etc. on each axle.

[0051] At each tire mounting position B11, etc., a tire figure showing a schematic tire is arranged, and information figures describing the tire pressure and tire temperature are arranged. The information figure describing the tire pressure is filled with, for example, yellow to indicate "Caution" when the tire pressure is less than the first threshold value and equal to or greater than the second threshold value, and filled with, for example, red to indicate "Danger" when the tire pressure is less than the second threshold value. In the example shown in Fig. 5, the optimum tire pressure value (median) is 950 KPa, the first threshold value is set to 850 KPa, and the second threshold value is set to 800 KPa.

[0052] The tire pressure management system 100 can provide the user with information on tire pressure and tire temperature in an easily understandable manner by displaying the screens shown in Figs. 4 and 5 on the display unit 35.

[0053] (Modification) In the above embodiment, an example has been shown in which the alert notification unit 34 notifies the user of the alert information and the priority alert information by email. An application provided by the tire pressure management device 30 may be installed in the user terminal device 40, and the tire pressure management device 30 may notify the user terminal device 40 of the alert information and the priority alert information via the application.

[0054] In addition, the alert generation unit 33 of the tire pressure management device 30 may generate alert information indicating a sensor signal interruption when tire pressure and tire temperature information cannot be obtained from the sensor 10 for a predetermined period of time (e.g., 120 minutes or more).

[0055] The transportation business operator is not limited to a business that operates and manages trucks for transportation, but also includes, for example, a taxi business operator, etc. Furthermore, the vehicle is not limited to a truck vehicle or a taxi vehicle, but also includes a rental vehicle provided by a rental business operator, a shared vehicle provided by a vehicle sharing business operator, etc.

[0056] Next, features of the tire pressure management system 100 and the tire pressure management method according to the embodiment will be described. The tire pressure management system 100 includes an information acquisition unit 32, an alert generation unit 33, and an alert notification unit 34. The information acquisition unit 32 acquires tire pressure information measured by a sensor 10 disposed in the tire 1. The alert generation unit 33 generates alert information when the tire pressure acquired by the information acquisition unit 32 is less than a first threshold value that is lower than an appropriate tire pressure value. The alert notification unit 34 notifies an external device after a predetermined period has elapsed that alert information has been generated by the alert generation unit 33 during the predetermined period. In this way, the tire pressure management system 100 can improve the convenience of tire pressure management by providing notification at an appropriate timing after the predetermined period has elapsed.

[0057] Furthermore, the alert generating unit 33 generates priority alert information when the tire pressure acquired by the information acquiring unit 32 is less than a second threshold value that is smaller than the first threshold value. When the priority alert information is generated, the alert notifying unit 34 notifies the outside of the priority alert information before a predetermined period of time has elapsed. In this way, the tire pressure management system 100 can inform the user that the tire pressure has significantly decreased before the predetermined period of time has elapsed.

[0058] Furthermore, when the tire pressure acquired by the information acquisition unit 32 is equal to or greater than the second threshold value, the alert generation unit 33 generates priority alert information if the rate of decrease in tire pressure within a predetermined period is equal to or greater than a predetermined value. This enables the tire pressure management system 100 to inform the user that the rate of decrease in tire pressure is large and that the tire pressure is decreasing rapidly.

[0059] The first threshold value is set based on the rate of decrease in fuel efficiency of the vehicle. This allows the tire pressure management system 100 to prompt the user to perform maintenance such as filling the tires 1 with air in order to improve fuel efficiency during vehicle travel.

[0060] The tire pressure management system 100 further includes a memory unit 36 ​​that stores the tire pressure information acquired by the information acquisition unit 32, and a display unit 35 that displays the tire pressure information stored in the memory unit 36. This enables the tire pressure management system 100 to provide the tire pressure information to the user in an easily understandable manner.

[0061] The tire pressure management method includes an information acquisition step, an alert generation step, and an alert notification step. The information acquisition step acquires tire pressure information measured by a sensor 10 disposed in a tire 1. The alert generation step generates alert information when the tire pressure acquired in the information acquisition step is less than a first threshold value that is lower than an appropriate tire pressure value. The alert notification step notifies an outside device after a predetermined period has elapsed that the alert information has been generated during the predetermined period by the alert generation step. According to this tire pressure management method, the convenience of tire pressure management can be improved by providing notification at an appropriate timing after the predetermined period has elapsed.

[0062] The above description is based on the embodiments of the present invention. These embodiments are merely examples, and it will be understood by those skilled in the art that various modifications and changes are possible within the scope of the claims of the present invention, and that such modifications and changes are also within the scope of the claims of the present invention. Therefore, the descriptions and drawings in this specification should be treated as illustrative rather than restrictive. [Explanation of symbols]

[0063] 1 tire, 10 sensor, 32 information acquisition unit, 33 alert generation unit, 34 alert notification section, 35 display section, 36 memory section, 100 Tire Pressure Management System.

Claims

1. an information acquisition unit that acquires information on tire pressure measured by a sensor disposed in the tire; an alert generating unit that generates alert information when the tire pressure acquired by the information acquiring unit is less than a first threshold value that is lower than an appropriate tire pressure value; an alert notification unit that notifies an outside party after a predetermined period of time has elapsed that alert information has been generated by the alert generation unit during the predetermined period of time; A tire pressure management system comprising:

2. the alert generation unit generates priority alert information when the tire pressure acquired by the information acquisition unit is less than a second threshold value that is smaller than the first threshold value; The tire pressure management system according to claim 1 , wherein the alert notification unit notifies an outside party of the priority alert information before the predetermined period of time has elapsed when the priority alert information is generated.

3. 3. The tire pressure management system according to claim 2, wherein the alert generation unit generates priority alert information if the tire pressure acquired by the information acquisition unit is equal to or higher than the second threshold value and a rate of decrease in tire pressure within the specified period is equal to or higher than a specified value.

4. The tire pressure management system according to claim 1 , wherein the first threshold value is set based on a rate of decrease in fuel efficiency of the vehicle.

5. a storage unit that stores the tire pressure information acquired by the information acquisition unit; a display unit that displays the tire pressure information stored in the memory unit; The tire pressure management system according to any one of claims 1 to 4, further comprising:

6. an information acquisition step of acquiring information on tire pressure measured by a sensor disposed in the tire; an alert generating step of generating alert information when the tire pressure acquired in the information acquiring step is less than a first threshold value that is lower than an appropriate tire pressure value; an alert notification step of notifying an outside party after a predetermined period of time has elapsed that alert information has been generated during the predetermined period of time by the alert generation step; A tire air pressure management method comprising:

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