Tire internal pressure management device, tire internal pressure management program, and tire internal pressure management method

Abstract

The tire internal pressure management device comprises: a data acquisition unit that acquires internal pressure time series data and temperature time series data of each tire installed on a mobile object including an aircraft and a vehicle; a representative value calculation unit that calculates, based on the acquired internal pressure time series data and temperature time series data, a representative value of the internal pressure data after temperature correction at predetermined intervals; and an internal pressure replenishment period prediction unit that predicts, based on the transition of the calculated representative value of the internal pressure data, a period when the internal pressure value is lower than a preset threshold value as an internal pressure replenishment period.

Description

Technical Field

[0001] The present invention relates to a tire internal pressure management device, a tire internal pressure management program, and a tire internal pressure management method applicable to tires of mobile objects including aircraft and vehicles. Background Art

[0002] When an aircraft tire, which is a type of mobile object, is mounted on an airframe or before takeoff, the internal pressure of the aircraft tire is checked and adjusted to an internal pressure that takes into account the load during takeoff and landing.

[0003] Furthermore, from the perspective of ensuring the safety of aircraft and the like, it is required to accurately grasp the internal pressure of aircraft tires and the like and to replenish the internal pressure as needed.

[0004] Therefore, various technologies related to tire internal pressure management devices that acquire and manage the internal pressure of aircraft tires and the like have been proposed (Patent Document 1).

[0005] In this way, the internal pressure of the tire is managed to grasp the appropriate timing for internal pressure replenishment, thereby ensuring the safety of aircraft and the like and preventing tire failures.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-58998 Summary of the Invention

[0009] Here, when the tire management device provides information on the timing of replenishing the tire internal pressure, etc., it is necessary to perform appropriate temperature correction because the internal pressure fluctuates according to the temperature change in the tire.

[0010] However, when aircraft take off and land, tire temperatures fluctuate significantly, making it difficult to accurately determine the temperature inside the tire. This makes it difficult to perform appropriate temperature corrections and accurately predict when to replenish tire pressure.

[0011] Therefore, the present invention has been completed in view of the above-mentioned problems, and its purpose is to provide a tire internal pressure management device, a tire internal pressure management program, and a tire internal pressure management method that can predict the appropriate internal pressure replenishment period for a tire even when the tire temperature of a mobile object such as an aircraft or a vehicle varies greatly.

[0012] The gist of a tire internal pressure management device according to one embodiment of the present invention is that it comprises: a data acquisition unit which acquires internal pressure time series data and temperature time series data for each tire installed on a mobile object including an aircraft or a vehicle; a representative value calculation unit which calculates, based on the acquired internal pressure time series data and the acquired temperature time series data, a representative value of the internal pressure data after temperature correction at predetermined intervals; and an internal pressure replenishment period prediction unit which predicts, based on the transition of the calculated representative value of the internal pressure data, a period when the internal pressure value is lower than a predetermined threshold value as an internal pressure replenishment period.

[0013] Thus, even when the tire temperature changes significantly, it is possible to predict an appropriate internal pressure replenishment timing.

[0014] Furthermore, the system may further include a tire number prediction unit that predicts the number of tires requiring internal pressure replenishment within a predetermined future period based on the calculation result of the internal pressure replenishment period of each tire.

[0015] This makes it possible to predict the man-hours required for the internal pressure replenishment operation, thereby improving the efficiency of the operation.

[0016] In addition, it is possible to further include an internal pressure replenishment period correction unit, which corrects the internal pressure replenishment period of each tire installed on the same mobile body so that the internal pressure replenishment period is the same period when the internal pressure replenishment period is within a predetermined period.

[0017] This allows the internal pressure replenishment operation to be performed collectively on a plurality of tires whose internal pressure replenishment timings are close to each other, thereby achieving further efficiency in the operation.

[0018] Furthermore, the system may further include an abnormality determination unit that calculates an internal pressure drop rate based on a change in a representative value of the internal pressure data and determines that an abnormality is present when the internal pressure drop rate exceeds a preset internal pressure drop rate threshold.

[0019] This makes it possible to quickly detect tire abnormalities and improve the safety of mobile objects including aircraft and vehicles.

[0020] In addition, the essence of the tire internal pressure management program involved in other embodiments of the present invention is that the tire internal pressure management program is executed by a tire internal pressure management device, and the tire internal pressure management program includes the following steps: a data acquisition step, for each tire installed on a mobile body including an aircraft and a vehicle, acquiring internal pressure time series data and temperature time series data; a representative value calculation step, for calculating the representative value of the internal pressure data after temperature correction at each prescribed period based on the acquired internal pressure time series data and the temperature time series data; and an internal pressure replenishment period prediction step, for predicting a period when the internal pressure value is lower than a predetermined threshold as an internal pressure replenishment period based on the change of the calculated representative value of the internal pressure data.

[0021] This makes it possible to predict an appropriate internal pressure replenishment timing even when the tire temperature changes significantly.

[0022] In addition, the gist of the tire internal pressure management method involved in other embodiments of the present invention is that it includes the following processes: a data acquisition process, which acquires internal pressure time series data and temperature time series data for each tire installed on a mobile object including an aircraft or a vehicle; a representative value calculation process, which calculates the representative value of the internal pressure data after temperature correction at specified intervals based on the acquired internal pressure time series data and the acquired temperature time series data; and an internal pressure replenishment period prediction process, which predicts a period when the internal pressure value is lower than a predetermined threshold as an internal pressure replenishment period based on the change in the calculated representative value of the internal pressure data.

[0023] This makes it possible to predict an appropriate internal pressure replenishment timing even when the tire temperature changes significantly.

[0024] According to the present invention, a tire internal pressure management device, a tire internal pressure management program, and a tire internal pressure management method can be provided that can predict an appropriate internal pressure replenishment period for a tire of a mobile object such as an aircraft or a vehicle even when the tire temperature of the tire fluctuates significantly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a functional block diagram showing the functional structure of the tire internal pressure management device according to the embodiment.

[0026] Figure 2 1 is a schematic configuration diagram illustrating a partial configuration example of a tire internal pressure management device according to an embodiment.

[0027] Figure 3 It is a schematic configuration diagram showing another configuration example of a portion of the tire internal pressure management device according to the embodiment.

[0028] Figure 4This is a flowchart illustrating an example of a processing procedure of a tire internal pressure management process executed by the tire internal pressure management device according to the embodiment. DETAILED DESCRIPTION

[0029] Reference Figures 1 to 4 A tire internal pressure management device 100 according to an embodiment of the present invention will be described.

[0030] In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratios of the dimensions and the like may differ from the actual ratios and the like.

[0031] Therefore, specific dimensions and the like should be determined in consideration of the following description. Furthermore, the drawings naturally include portions where the relationships and ratios of dimensions differ from one another.

[0032] (Schematic Structure of Tire Internal Pressure Management Device)

[0033] Reference Figure 1 Function block diagram and Figure 2 , the schematic structure of the tire internal pressure management device 100 according to the embodiment will be described.

[0034] The tire pressure management device 100 is composed of, for example, a general-purpose computer, a server, etc. Figure 1 As shown, the tire internal pressure management device 100 is configured to receive internal pressure data and temperature data from a sensor unit SU provided in each tire 10 ( 10 a , 10 b , etc.) mounted on a mobile object M1 such as an aircraft or a vehicle via a wireless line N1 .

[0035] like Figure 2 As shown, a tire 10 is mounted on a rim 11 to form a tire air chamber 12 .

[0036] The sensor unit SU is provided inside the rim 11 or on the inner wall of the tire 10. Depending on the type of the mobile body M1, for example, an aircraft tire is used for an aircraft, and a vehicle tire is used for a vehicle.

[0037] like Figure 1 As shown, the tire internal pressure management device 100 includes a receiving unit 101 that receives internal pressure data and temperature data from a sensor unit SU having a transmission function via a wireless line N1.

[0038] The tire internal pressure management device 100 also includes a data acquisition unit 102 that acquires internal pressure time-series data and temperature time-series data based on the received internal pressure data and temperature data.

[0039] The tire internal pressure management device 100 also includes a representative value calculation unit 103. This unit calculates a representative value of the internal pressure data after temperature correction at predetermined intervals (e.g., 24 hours) based on the acquired internal pressure time-series data and temperature time-series data. Furthermore, if the mobile object M1 is an aircraft, for example, temperature correction can be performed based on simulation results of the internal pressure from the time immediately after landing, when the tire 10 reaches a high temperature (e.g., approximately 70 to 80 degrees Celsius), until the temperature reaches the outside air temperature.

[0040] The tire internal pressure management device 100 also includes an internal pressure replenishment timing prediction unit 104 that predicts a timing when the internal pressure value falls below a preset threshold as an internal pressure replenishment timing based on the transition of the calculated representative value of the internal pressure data.

[0041] This makes it possible to predict an appropriate internal pressure replenishment timing even when the tire temperature changes significantly, as in the case where the mobile object M1 is an aircraft, thereby contributing to improved safety of aircraft and the like.

[0042] In addition, the tire internal pressure management device 100 has a tire number prediction unit 105, which predicts the number of tires that need to be replenished with tire pressure within a specified period in the future (for example, one day to one week) based on the calculation results of the internal pressure replenishment period of each tire 10 (10a, 10b, etc.).

[0043] This makes it possible to predict the time required for the internal pressure replenishment operation, thereby improving the efficiency of the operation. In particular, when the mobile object M1 is an aircraft, internal pressure replenishment operations must be performed in the short period of time during takeoff and landing. By predicting the number of tires requiring internal pressure replenishment (for example, only three out of six tires require replenishment), the operation can be performed efficiently.

[0044] Furthermore, not only the number of tires requiring internal pressure replenishment can be determined, but also which tires 10a, 10b, etc. require internal pressure replenishment (for example, one front wheel and two rear wheels) can be determined. In this case, the work can be performed more efficiently.

[0045] In addition, the tire internal pressure management device 100 has an internal pressure replenishment period correction unit 106. When the internal pressure replenishment period of each tire 10 (10a, 10b, etc.) installed on the same mobile body M1 is within a predetermined period (for example, one day to one week), the internal pressure replenishment period correction unit 106 corrects the internal pressure replenishment period so that the internal pressure replenishment period becomes the same period.

[0046] As a result, the internal pressure replenishing operation can be collectively performed on a plurality of tires 10a, 10b, etc., whose internal pressure replenishing timings are relatively close, and further efficiency of the operation can be achieved.

[0047] The tire internal pressure management device 100 also includes an abnormality determination unit 107 that calculates an internal pressure drop rate based on changes in a representative value of internal pressure data and determines an abnormality when the internal pressure drop rate exceeds a preset internal pressure drop rate threshold.

[0048] This makes it possible to quickly detect abnormalities in the tires 10 ( 10 a , 10 b , etc.), and contribute to improving the safety of the mobile object M1 including aircraft and vehicles.

[0049] Furthermore, when it is determined that there is an abnormality, a configuration can be made so that an alarm is displayed on the display unit 200 constituted by a liquid crystal display device or the like, or a sound message is emitted to notify a manager or the like.

[0050] (About data acquisition method)

[0051] Reference Figure 2 and Figure 3 A method of acquiring the internal pressure data and temperature data of the tire 10 will be briefly described.

[0052] exist Figure 2 In the illustrated embodiment, a sensor unit SU having a transmitting function is provided on the inner side of a rim 11 to which the tire 10 is mounted or on the inner wall of the tire 10 .

[0053] As a result, the internal pressure data and temperature data acquired by the sensor unit SU can be acquired via the receiving unit 101 of the tire internal pressure management device 100 or a dedicated reading device.

[0054] In addition, Figure 3 In the illustrated embodiment, a valve B equipped with a sensor is provided on the rim 11 on which the tire 10 is mounted, and a dedicated reading device 300 is brought close to the valve B to acquire internal pressure data and temperature data.

[0055] The dedicated reader 300 is configured, for example, to include a data receiving unit 301 at its front end, and displays the acquired internal pressure and temperature data on a display unit 302, such as a liquid crystal display, for confirmation. Furthermore, the dedicated reader 300 has a transmission function, enabling the tire internal pressure management device 100 to receive and acquire the internal pressure and temperature data via the receiving unit 101.

[0056] (Regarding tire internal pressure management)

[0057] Reference Figure 4An example of a processing procedure of the tire internal pressure management process executed by the tire internal pressure management device 100 will be described with reference to a flowchart of FIG.

[0058] When this process starts, first, in step S10 , internal pressure time series data and temperature time series data are acquired, and then the process shifts to step S11 .

[0059] In step S11 , based on the obtained internal pressure time series data and temperature time series data, a representative value of the internal pressure data after temperature correction is calculated for each predetermined period, and the process then moves to step S12 .

[0060] In step S12 , based on the change in the calculated representative value of the internal pressure data, the period when the internal pressure value falls below a preset threshold is predicted as the internal pressure replenishment period, and the process then moves to step S13 .

[0061] In step S13 , based on the calculation results of the internal pressure replenishment periods of the tires 10 a , 10 b , etc. , the number of tires requiring internal pressure replenishment in a predetermined future period is predicted, and the process then moves to step S14 .

[0062] In step S14 , when the internal pressure replenishment timings of the tires 10 a , 10 b , etc. mounted on the same mobile body M1 are within a predetermined period, correction is made so that the internal pressure replenishment timings become the same period, and the process then moves to step S15 .

[0063] In step S15 , the internal pressure drop speed is calculated based on the transition of the representative value of the internal pressure data, and it is determined whether the internal pressure drop speed is higher than a preset internal pressure drop speed threshold.

[0064] Then, if the determination result is "No", the process returns to step S10, and if it is "Yes", the process shifts to step S16.

[0065] In step S16 , it is determined that an abnormality has occurred, and notification is made by displaying a message or outputting a sound, and the process ends.

[0066] Furthermore, the processing results in steps S11 to S14 may be displayed and output on the display unit 200 .

[0067] This makes it possible to predict an appropriate internal pressure replenishment timing even when the tire temperature fluctuates greatly, such as when the mobile object M1 is an aircraft, thereby contributing to improved safety and work efficiency.

[0068] The tire internal pressure management device, tire state quantity estimation program, and tire state quantity estimation method of the present invention have been described above based on the illustrated embodiments. However, the present invention is not limited thereto, and the configuration of each component can be replaced with any configuration having the same function.

[0069] For example, the internal pressure replenishment timing prediction unit 104 may reset the internal pressure replenishment timing based on information related to tire replacement and internal pressure replenishment.

[0070] Furthermore, the tire internal pressure management device 100 may be configured to include a notification unit that transmits the internal pressure replenishment period calculated by the internal pressure replenishment period prediction unit 104 and the predicted number of tires calculated by the tire number prediction unit 105 to a predetermined notification destination.

[0071] Furthermore, when a notification unit is provided, the internal pressure replenishment target value set for each tire may be transmitted.

[0072] Furthermore, at least the prescribed period for acquiring the internal pressure data does not need to be fixed.

[0073] Furthermore, when the mobile object M1 is an aircraft, the acquired internal pressure data may be corrected based on the elapsed time from the time of landing until the time when the internal pressure data is acquired.

[0074] Furthermore, the internal pressure replenishment period prediction unit 104 may also change the internal pressure replenishment period (e.g., change the threshold value) based on the predicted temperature (e.g., based on a weather forecast). This is because temperature is an important factor in predicting tire internal pressure, and in particular, whether the actual internal pressure falls below a predetermined value is often affected by the temperature of the day.

[0075] Furthermore, the tire internal pressure management device 100 may further calculate and notify information on the temperature or air temperature required to replenish the internal pressure at the calculated internal pressure replenishment time.

[0076] That is, for example, by displaying a message such as “In … days, if the temperature is …° C., tires need to be replenished” on the display unit 200 or by providing a notification in the form of an audio signal, safety and convenience can be improved.

[0077] Description of Reference Numerals

[0078] M1: mobile object (aircraft, vehicle, etc.); 100: tire internal pressure management device; 10 (10a, 10b...): tire; SU: sensor unit; 101: receiving unit; 102: data acquisition unit; 103: representative value calculation unit; 104: internal pressure replenishment period prediction unit; 105: tire number prediction unit; 106: internal pressure replenishment period correction unit; 107: abnormality judgment unit; 200: display unit.

Claims

1. A tire internal pressure management device, characterized in that: have: a data acquisition unit that acquires internal pressure time-series data and temperature time-series data for each tire mounted on a mobile object such as an aircraft; a representative value calculation unit that calculates a representative value of the temperature-corrected internal pressure data for each predetermined period based on the acquired internal pressure time-series data and the acquired temperature time-series data, wherein the predetermined period includes a period from immediately after the aircraft lands until the temperature of the tire reaches the outside air temperature; an internal pressure replenishment period prediction unit that predicts a period when the internal pressure value falls below a preset threshold value as an internal pressure replenishment period based on a change in the calculated representative value of the internal pressure data; and The tire number prediction unit predicts the number of tires requiring internal pressure replenishment during a predetermined future period between arrival and takeoff of the aircraft based on the calculation result of the internal pressure replenishment period of each tire.

2. The tire internal pressure management device according to claim 1, wherein: The invention further comprises an internal pressure replenishment timing correction unit for correcting the internal pressure replenishment timings so as to make the internal pressure replenishment timings the same when the internal pressure replenishment timings of the tires mounted on the same mobile body are within a predetermined period set in advance.

3. The tire internal pressure management device according to claim 1 or 2, characterized in that: The device further includes an abnormality determination unit that calculates an internal pressure drop rate based on a change in a representative value of the internal pressure data and determines that an abnormality is present when the internal pressure drop rate exceeds a preset internal pressure drop rate threshold.

4. The tire internal pressure management device according to claim 1, wherein The internal pressure replenishment period prediction unit changes the internal pressure replenishment period based on a predicted air temperature, and the tire internal pressure management device further calculates information on a temperature or air temperature required for replenishing the internal pressure during the internal pressure replenishment period.

5. A computer program product, characterized in that The invention includes a tire internal pressure management program executed by a tire internal pressure management device, wherein the tire internal pressure management program includes the following steps: a data acquisition step of acquiring internal pressure time series data and temperature time series data for each tire mounted on a mobile object such as an aircraft; a representative value calculation step of calculating, based on the acquired internal pressure time-series data and the acquired temperature time-series data, a representative value of the internal pressure data after temperature correction for each predetermined period, wherein the predetermined period includes a period from immediately after the aircraft lands until the temperature of the tire reaches the outside air temperature; an internal pressure replenishment period prediction step of predicting a period when the internal pressure value falls below a preset threshold value as an internal pressure replenishment period based on a change in the calculated representative value of the internal pressure data; and Based on the calculation result of the internal pressure replenishment period of each tire, the number of tires requiring internal pressure replenishment during a predetermined future period between arrival and takeoff of the aircraft is predicted.

6. A tire internal pressure management method, characterized in that: The following processes are included: The data acquisition process acquires internal pressure time series data and temperature time series data for each tire mounted on a mobile object such as an aircraft; a representative value calculation step of calculating, based on the acquired internal pressure time series data and the acquired temperature time series data, a representative value of the internal pressure data after temperature correction for each predetermined period, wherein the predetermined period includes a period from immediately after the aircraft lands until the temperature of the tire reaches the outside air temperature; an internal pressure replenishment period prediction process of predicting a period when the internal pressure value is lower than a preset threshold value as an internal pressure replenishment period based on the calculated transition of the representative value of the internal pressure data; and The tire number prediction process predicts the number of tires requiring internal pressure replenishment during a predetermined future period between arrival and takeoff of the aircraft based on the calculation result of the internal pressure replenishment period of each tire.

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