TIRE INTERNAL PRESSURE MANAGEMENT DEVICE, TIRE INTERNAL PRESSURE MANAGEMENT PROGRAM, AND TIRE INTERNAL PRESSURE MANAGEMENT METHOD

A tire internal pressure management device includes a data acquisition unit that acquires internal pressure time series data and temperature time series data of each tire mounted on a mobile body including an aircraft and a vehicle, a representative value calculation unit that calculates a representative value of internal pressure data subjected to temperature correction for each predetermined period, based on the acquired internal pressure time series data and temperature time series data, and an internal pressure filling timing prediction unit that predicts a timing when an internal pressure value falls below a threshold value that is set in advance as an internal pressure filling timing, based on a transition of the calculated representative value of the internal pressure data.

TECHNICAL FIELD

The present embodiment relates to a tire internal pressure management device, a tire internal pressure management program, and a tire internal pressure management method which are applicable to tires of a mobile body including an aircraft and a vehicle.

BACKGROUND ART

An internal pressure of tires for an aircraft, which is a type of a mobile body, is checked when the tires are mounted on an aircraft or before takeoff, and is adjusted so as to become the internal pressure that takes into account the load during takeoff and landing.

For tires for an aircraft or the like, it is necessary to accurately grasp an internal pressure and fill the internal pressure as necessary from the viewpoint of ensuring the safety of an aircraft or the like.

Accordingly, various technologies have been proposed for tire internal pressure management devices that acquire and manage the internal pressure of tires for an aircraft (Patent Literature 1).

This ensures the safety of an aircraft and prevents the failure of tires by controlling the internal pressure of the tires and grasping an appropriate timing for filling the internal pressure or the like.

CITATION LIST

Patent Literature

SUMMARY OF THE INVENTION

Technical Problem

Here, when the tire management device provides information on the timing for filling the internal pressure of tires, it is necessary to perform appropriate temperature correction because the internal pressure changes due to the temperature change in the tires.

However, when the temperature of the tires changes greatly due to the takeoff and landing of an aircraft or the like, it is inconvenient that it is difficult to accurately grasp the internal temperature of the tires. For this reason, there has been a problem that proper temperature correction cannot be performed and thus that the timing for filling the tire internal pressure cannot be accurately predicted.

Therefore, the present invention has been made in view of the above problem, and an object of the present invention is to provide a tire internal pressure management device, a tire internal pressure management program, and a tire internal pressure management method capable of predicting an appropriate internal pressure filling timing of tires of a mobile body including an aircraft and a vehicle even when the temperature of the tires changes greatly.

Technical Solution

A tire internal pressure management device according to an aspect of the present invention includes: a data acquisition unit that acquires internal pressure time series data and temperature time series data of each tire mounted on a mobile body including an aircraft and a vehicle; a representative value calculation unit that calculates a representative value of internal pressure data subjected to temperature correction for each predetermined period, based on the acquired internal pressure time series data and temperature time series data; and an internal pressure filling timing prediction unit that predicts a timing when an internal pressure value falls below a threshold value that is set in advance as an internal pressure filling timing, based on a transition of the calculated representative value of the internal pressure data.

This makes it possible to predict an appropriate internal pressure filling timing even when the temperature of tires changes greatly.

Further, the tire internal pressure management device may include a tire number prediction unit that predicts the number of tires for which a tire internal pressure needs to be filled in a future predetermined period, based on a calculation result of the internal pressure filling timing of each tire.

This makes it possible to predict the man-hour required in the internal pressure filling operation, thereby improving the efficiency of the operation.

Further, the tire internal pressure management device may include an internal pressure filling timing correction unit that corrects the internal pressure filling timing of each tire mounted on the same moving body such that the internal pressure filling timing becomes the same timing when the internal pressure filling timing is within a predetermined period that is set in advance.

This makes it possible to collectively perform the internal pressure filling operation for a plurality of tires whose internal pressure filling timing is relatively close to each other, thereby further improving the efficiency of the operation.

Further, the tire internal pressure management device may include an abnormality determination unit that calculates an internal pressure lowering speed based on a transition of the representative value of the internal pressure data, and determines to be abnormal when exceeding a threshold value of the internal pressure lowering speed that is set in advance.

This makes it possible to quickly detect the abnormality of tires, thereby contributing to improving the safety of a mobile body including an aircraft and a vehicle.

Further, a tire internal pressure management program according to another aspect of the present invention includes: a data acquisition step of acquiring internal pressure time series data and temperature time series data of each tire mounted on a mobile body including an aircraft and a vehicle; a representative value calculation step of calculating a representative value of internal pressure data subjected to temperature correction for each predetermined period, based on the acquired internal pressure time series data and temperature time series data; and an internal pressure filling timing prediction step of predicting a timing when an internal pressure value falls below a threshold value that is set in advance as an internal pressure filling timing, based on a transition of the calculated representative value of the internal pressure data, in which the tire internal pressure management program is executed in a tire internal pressure management device.

This makes it possible to predict an appropriate internal pressure filling timing even when the temperature of tires changes greatly.

Further, a tire internal pressure management method according to another aspect of the present invention includes: a data acquisition process of acquiring internal pressure time series data and temperature time series data of each tire mounted on a mobile body including an aircraft and a vehicle; a representative value calculation process of calculating a representative value of internal pressure data subjected to temperature correction for each predetermined period, based on the acquired internal pressure time series data and temperature time series data; and an internal pressure filling timing prediction process of predicting a timing when an internal pressure value falls below a threshold value that is set in advance as an internal pressure filling timing, based on a transition of the calculated representative value of the internal pressure data.

This makes it possible to predict an appropriate internal pressure filling timing even when the temperature of tires changes greatly.

The present invention makes it possible to provide a tire internal pressure management device, a tire internal pressure management program, and a tire internal pressure management method capable of predicting an appropriate internal pressure filling timing of tires of a mobile body including an aircraft and a vehicle even when the temperature of the tires changes greatly.

DESCRIPTION OF EMBODIMENTS

A tire internal pressure management device M1according to an embodiment of the present invention will be described with reference toFIGS.1to4.

Note that the same or similar portions are denoted by the same or similar reference numerals in the following descriptions of the drawings. It should be noted however that the drawings are schematic and ratios of dimensions and the like are different from the actual ones.

Accordingly, specific dimensions and the like should be determined in consideration of the following descriptions. Moreover, the drawings include parts showing dimensional relations and ratios that are different from each other, as a matter of course.

(Schematic Configuration of Tire Internal Pressure Management Device)

A schematic configuration of a tire internal pressure management device100according to an embodiment will be described with reference to a functional block diagram ofFIG.1and a schematic configuration diagram ofFIG.2.

The tire internal pressure management device100is configured of, for example, a general-purpose computer, a server, and the like, and as illustrated inFIG.1, is configured to receive internal pressure data and temperature data from a sensor unit SU provided in each tire10(10a,10b. . . ) mounted on a mobile body M1including an aircraft or a vehicle via a wireless line N1.

As illustrated inFIG.2, the tire10is mounted on a wheel11to form a tire air chamber12.

The sensor unit SU is provided inside the wheel11or on the inner wall of the tire10. It is needless to say that, for example, an aircraft tire is used in an aircraft and a vehicle tire is used in a vehicle, depending on the type of the mobile body M1.

As illustrated inFIG.1, the tire internal pressure management device100includes a reception unit101that receives internal pressure data and temperature data from the sensor unit SU having a transmission function via the wireless line N1.

The tire internal pressure management device100includes a data acquisition unit102that acquires internal pressure time series data and temperature time series data, based on the received internal pressure data and temperature data.

In addition, the tire internal pressure management device100includes a representative value calculation unit103that calculates a representative value of the internal pressure data subjected to temperature correction for each predetermined period (for example, 24 hours), based on the acquired internal pressure time series data and temperature time series data. For example, in a case where the mobile body M1is an aircraft, the temperature can be corrected based on a simulation result of the internal pressure from immediately after landing when the tire10becomes high heat (for example, about 70 to 80 degrees) until becoming the outside air temperature.

In addition, the tire internal pressure management device100includes an internal pressure filling timing prediction unit104that predicts a timing when the internal pressure value falls below a threshold value that is set in advance as an internal pressure filling timing, based on a transition of the calculated representative value of the internal pressure data.

This makes it possible to predict an appropriate internal pressure filling timing even the temperature of the tires changes greatly, as in the case where the moving body M1is an aircraft, thereby contributing to improving the safety of an aircraft or the like.

Further, the tire internal pressure management device100includes a tire number prediction unit105that predicts the number of tires for which a tire internal pressure needs to be filled in a future predetermined period (for example, from one day to about one week), based on the calculation result of the internal pressure filling timing of each tire10(10a,10b. . . ).

This makes it possible to predict the man-hour required in the internal pressure filling operation, thereby improving the efficiency of the operation. In particular, when the mobile body M1is an aircraft, the internal pressure filling operation needs to be performed in a short period between the arrival and departure, and the operation can be performed efficiently by grasping the prediction result of the number of tires for which a tire internal pressure needs to be filled (for example, the operation only needs to be performed on three tire among six tires).

In addition to the number of tires for which a tire internal pressure needs to be filled, it is also possible to specify that the internal pressure filling operation is required for which tires10a,10b. . . (for example, specify one front wheel and two rear wheels), and in this case, the operation can be performed more efficiently.

In addition, the tire internal pressure management device100includes an internal pressure filling timing correction unit106that corrects an internal pressure filling timing of each tire10(10a,10b. . . ) mounted on the same moving body M1such that the internal pressure filling timing becomes the same timing when the internal pressure filling timing is within a predetermined period that is set in advance (for example, from one day to about one week).

This makes it possible to collectively perform the internal pressure filling operation for a plurality of tires10aand10b. . . whose internal pressure filling timing is relatively close to each other, thereby further improving the efficiency of the operation.

In addition, the tire internal pressure management device100includes an abnormality determination unit107that calculates an internal pressure lowering speed based on the transition of the representative value of the internal pressure data, and determines to be abnormal when exceeding a threshold value of the internal pressure lowering speed that is set in advance.

This makes it possible to quickly detect the abnormality of the tire10(10a,10b. . . ), thereby contributing to improving the safety of the mobile body M1including an aircraft and a vehicle.

When it is determined to be abnormal, the manager or the like can be notified by displaying an alert on a display unit200constituted of a liquid crystal display device or the like, or producing a voice message.

(Mode of Data Acquisition)

A mode in which internal pressure data and temperature data of the tire10are acquired will be briefly described with reference toFIGS.2and3.

In the mode illustrated inFIG.2, the sensor unit SU having a transmission function is provided inside the wheel11on which the tire10is mounted, or on the inner wall of the tire10.

This makes it possible to acquire the internal pressure data and the temperature data acquired by the sensor unit SU via the reception unit101of the tire internal pressure management device100, or a dedicated reading device.

In the mode illustrated inFIG.3, a valve B having a sensor is provided on the wheel11on which the tire10is mounted, and a dedicated reading device300is brought close to the valve B, thereby acquiring the internal pressure data and temperature data.

The dedicated reading device300includes, for example, a data reception unit301at the tip end thereof, and is configured to display and check the values of the acquired internal pressure data and temperature data on a display unit302constituted of a liquid crystal display or the like. Further, the dedicated reading device300has a transmission function, and the tire internal pressure management device100can receive and acquire the internal pressure data and the temperature data at the reception unit101.

(Tire Internal Pressure Management Processing)

A description will be given regarding an example of a processing procedure of tire internal pressure management processing executed by the tire internal pressure management device100will be described with reference to the flowchart ofFIG.4.

When the processing has started, the internal pressure time series data and temperature time series data are first acquired in step S10, and the processing proceeds to step S11.

In step S11, a representative value of the internal pressure data subjected to temperature correction for each predetermined period is calculated, based on the acquired internal pressure time series data and temperature time series data, and the processing proceeds to step S12.

In step S12, the timing when an internal pressure value falls below the predetermined threshold value is predicted as the internal pressure filling timing, based on the transition of the calculated representative value of the internal pressure data, and the processing proceeds to step S13.

In step S13, the number of tires for which a tire internal pressure needs to be filled in the future predetermined period is predicted based on the calculation result of the internal pressure filling timing of each tire10a,10b. . . , and the processing proceeds to step S14.

In step S14, when the internal pressure filling timing of each tire10a,10b. . . mounted on the same mobile body M1is within a predetermined period, the internal pressure filling timing is corrected so as to become the same timing, and the processing proceeds to step S15.

In step S15, the internal pressure lowering speed is calculated based on the transition of the representative value of the internal pressure data, and it is determined whether or not the internal pressure lowering speed has exceeded a threshold value of the internal pressure lowering speed that is set in advance.

If the determination result is “No”, the processing returns to step S10, and if it is “Yes”, the processing moves to step S16.

In step S16, it is determined to be abnormal, and the processing will end with notification by display of a message, or notification by voice output.

Note that the processing results in steps S11to S14may be output and displayed on the display unit200.

This makes it possible to predict an appropriate internal pressure filling timing or the like even when the temperature of tires changes greatly, for example, in a case where the moving body M1is an aircraft, thereby contributing to improving the safety and efficiency of an operation.

The tire internal pressure management device, the tire state amount estimation program, and the tire state amount estimation method of the present invention have been described based on the illustrated embodiment; however, the present invention is not limited thereto, and the configuration of each component may possibly be replaced by any other configurations having equivalent functions.

For example, the internal pressure filling timing prediction unit104may reset an internal pressure filling timing, based on information on tire replacement and internal pressure filling.

The tire internal pressure management device100may be configured to include a notification unit that transmits to a predetermined notification destination, an internal pressure filling timing calculated by the internal pressure filling timing prediction unit104and the predicted number of tires calculated by the tire number prediction unit105.

In addition, when the notification unit is provided, an internal pressure filling target value set for each tire may be transmitted.

In addition, the predetermined period for acquiring minimum internal pressure data may not be constant.

In addition, acquired when the mobile body M1is an aircraft, the acquired internal pressure data may be corrected based on the elapsed time from the time of landing to the time in which the internal pressure data is.

The internal pressure filling timing prediction unit104may change an internal pressure filling timing (for example, change a threshold value) according to a predicted air temperature (for example, based on weather forecasts). That is, when predicting a tire internal pressure, air temperature becomes an important factor, and in particular, whether or not the tire internal pressure actually falls below a specified internal pressure is often affected by the air temperature of the day.

In addition, the tire internal pressure management device100may further calculate and report a temperature at which the internal pressure filling is required in the calculated internal pressure filling timing, or the temperature information.

That is, for example, information such as “after . . . days, if the temperature is . . . ° C., the tires need to be filled” can be displayed on the display unit100, or notified by producing voice, thereby improving the safety and convenience of the tire internal pressure management device100.

LIST OF REFERENCE NUMERALS

M1: Mobile body (aircraft, vehicle, or the like)100: Tire internal pressure management device10(10a,10b. . . ): TireSU: Sensor unit101: Reception unit102: Data acquisition unit103: Representative value calculation unit104: Internal pressure filling timing prediction unit105: Tire number prediction unit106: Internal pressure filling timing correction unit107: Abnormality determination unit200: Display unit