JP2011102082A - Tire management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manage the state of all tires based on tire information acquired from an electronic part installed in some tires of a vehicle mounted with a plurality of tires. <P>SOLUTION: The tire information on the tire except for a measurement object tire is calculated from the tire information including at least internal pressure and the temperature of a tire 110 (the measurement object tire) measured by the electronic part 500, information on an installation position of the tire and the tire information on the measurement object tire, and a target value of the tire information stored in a data storage part 314 is compared with the tire information on the tire except for the measurement object tire. When a difference between the internal pressure and the target value of the measurement object tire differs, for example, by ±5% or more, it is determined as abnormal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a tire management system including an electronic component that measures at least an internal pressure of a tire mounted on a vehicle, and a management device that manages tire information including at least the internal pressure of the tire.

  Tires mounted on large vehicles used at mining sites for mineral resources are large and special, so when a problem such as a burst occurs, the cost for replacement is high. This tire tends to generate heat more easily than a tire mounted on a passenger car, and the change in internal pressure is large. Moreover, this tire is used under severe road surface environment and use frequency. However, in spite of the above situation, it is difficult to spend sufficient time for maintenance of large vehicles and tires from the viewpoint of efficiency of mining work and the like.

  Therefore, a tire management system has been proposed in which a user (a business operator who uses and manages a plurality of vehicles) can monitor the state of the tires mounted on the vehicle.

  For example, a tire management system is a sensor that measures the internal pressure and temperature of a tire mounted on a vehicle, an electronic component such as a radio, and a terminal that manages tire information such as the internal pressure and temperature of the tire measured by the electronic component. (For example, refer to Patent Document 1). Thereby, the user can monitor the state of all the tires mounted on all the vehicles.

JP 2007-91202 A (page 5-7, FIG. 1)

  However, the conventional tire management system described above has the following problems. That is, if an electronic component that measures tire information such as tire internal pressure and temperature fails, tire information of the tire on which the failed electronic component is mounted cannot be detected. For this reason, it is impossible to monitor whether or not the tire is used in an appropriate state, and there is a risk of causing problems due to tire overwork.

  Therefore, the present invention provides a tire management system capable of managing the state of all tires based on tire information acquired from electronic components mounted on some tires of a vehicle on which a plurality of tires are mounted. And

  In order to solve the above-described problems, the present invention has the following features. First, the first feature of the present invention is that an electronic component (electronic component 500) that measures at least the internal pressure and temperature of a tire (tire 110) mounted on a vehicle (vehicle 100), and at least the internal pressure and temperature of the tire are measured. A tire management system (tire management system 1) including a management device (management device 301) for managing tire information including the electronic component is provided on a measured tire among tires mounted on the vehicle, A measurement unit that measures tire information including at least the internal pressure and temperature of the tire, tire information measured by the measurement unit, and attachment position information related to the attachment position where the measured tire is attached are output to the management device An output unit (transmission unit 512) that performs the management device, the communication unit (communication unit 311) that receives the tire information, and the communication unit A processing unit (CPU 312) that calculates tire information of a tire other than the measured tire from the received tire information and the mounting position information, tire information of the measured tire, and tires other than the measured tire The gist is to include a display unit (display unit 313) that displays tire information.

  According to the first aspect of the present invention, the tire internal pressure and temperature of the tire not directly measured are calculated based on the tire internal pressure and temperature measured by the electronic component provided on the measured tire. For this reason, even if it is the tire which has not measured the internal pressure and temperature with the electronic component, a use condition can be monitored. Thereby, generation | occurrence | production of the malfunction by the overwork of a tire can be reduced. Therefore, the state of all tires can be managed based on tire information acquired from electronic components mounted on some tires of a vehicle on which a plurality of tires are mounted.

  A second feature of the present invention relates to the first feature of the present invention, wherein the electronic component is provided in a plurality of tires, and the management device is a reference tire that serves as a reference from the plurality of measured tires. And calculating tire information of a tire not mounted with the electronic component from the tire information of the reference tire and the information on the mounting position of the reference tire.

  According to the second feature of the present invention, it is possible to calculate tire information of a tire not equipped with an electronic component by using tire information of a reference tire among a plurality of tires provided with the electronic component.

  A third feature of the present invention relates to the first feature of the present invention, wherein the management device stores a plurality of tire mounting positions mounted on the vehicle in association with relationships between individual tire information. And the management device extracts tire information of tires other than the measured tire from the storage unit based on tire information of the measured tire. To do.

  According to the third feature of the present invention, since the mounting positions of the plurality of tires mounted on the vehicle and the relationship between the individual tire information are stored in association with each other in advance, the load caused by the calculation in the processing unit is reduced. can do. Further, it is possible to shorten the processing period until the tire information of the tire other than the measured tire is displayed.

  A fourth feature of the present invention relates to the first feature of the present invention, wherein the management device stores a target value storage unit (data storage unit 314, target value database) for storing at least a target internal pressure value of the tire. And the management device compares the internal pressure included in the tire information of the measured tire with the target value stored in the target value storage unit, and the internal pressure difference of the measured tire is calculated from the target value. The gist is to display a warning on the display section when the deviation is ± 5% or more.

  According to the fourth aspect of the present invention, based on tire information acquired from electronic components mounted on some tires, a state of a tire that is not directly measured is predicted and notified to an administrator or a driver. can do.

  ADVANTAGE OF THE INVENTION According to this invention, the tire management system which can manage the state of all the tires based on the tire information acquired from the electronic component with which the one part tire of the vehicle with which a some tire is mounted | worn can be provided.

FIG. 1 is a schematic diagram for explaining an environment to which a tire management system according to an embodiment of the present invention is applied. FIG. 2 is a configuration diagram illustrating the tire management system according to the embodiment of the present invention. FIG. 3 is a schematic diagram illustrating a tire on which electronic components are mounted in the tire management system according to the embodiment of the present invention. FIG. 4 is a flowchart for explaining processing for calculating tire information of a tire in which an electronic component is not mounted by the tire management system according to the embodiment of the present invention.

  Hereinafter, a tire management system according to an embodiment of the present invention will be described. Specifically, (1) Configuration of work environment, (2) Configuration of tire management system, (3) Operation of tire management system, (4) Action and effect, (5) Other embodiments will be described.

  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 ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(1) Configuration of Work Environment First, a work environment to which the tire management system 1 is applied will be described with reference to the drawings. As shown in FIG. 1, the work environment is roughly constituted by a plurality of vehicles 100 (large vehicles such as trucks), an excavator car 200, a tire information management center 300 (management device), and a maintenance factory 400. .

  The vehicle 100 transports mineral resources to a corresponding destination at the mining site A (or mining site B). The excavator 200 loads mineral resources on the vehicle 100. The tire information management center 300 receives tire information transmitted from an electronic component 500 (not shown in FIG. 1) mounted on tires of a plurality of vehicles 100. Details of the tire information will be described later.

  The tire information management center 300 manages tire information of tires attached to the vehicle 100. The tire information management center 300 transmits, for example, abnormality information that informs that an abnormality has occurred in the tire, or information (information I1) that instructs the maintenance factory 400 to inspect the tire 110 (information I1). Send to. In addition, the tire information management center 300 transmits information (information I2) that informs a travel route on which the tire is least burdened among a plurality of travel routes for the vehicle 100 to travel from the current position to the destination.

  The maintenance factory 400 is a factory that inspects and maintains the vehicle 100 and the tires 110 attached to the vehicle 100. The maintenance factory 400 includes a maintenance factory management center 410 that manages the inspection date and time of the vehicle 100 or the tire 110.

(2) Configuration of Tire Management System The configuration of the tire management system 1 will be described with reference to the drawings. FIG. 2 is a diagram illustrating the configuration of the tire management system 1. The tire management system 1 includes an electronic component 500 that measures tire information including at least the internal pressure and temperature of the tire 110 that is mounted on the vehicle 100, and a management device 301 that manages tire information sent from the electronic component 500.

  The electronic component 500 includes a measurement unit that measures tire information including at least the internal pressure and temperature of the tire 110. The tire information measured by the measurement unit is sent to the communication device 501 installed in the vehicle 100. The communication device 501 includes a transmission unit (see the transmission unit 512 shown in FIG. 3) for transmitting to the management device 301 (the measurement unit is not shown in FIG. 2). In the embodiment, the transmission unit constitutes an output unit.

  In the present embodiment, the electronic component 500 is fixed to the inner wall surface of the sidewall portion of the tire 110 or the rim R on which the tire 110 is assembled. The measurement unit can measure the internal pressure of the tire 110, the temperature of the tire 110 (for example, the air temperature inside the tire 110, the temperature of the tire 110 itself), and the like.

  The communication device 501 transmits tire information measured by the electronic component 500 to the tire information management center 300. The communication device 501 may receive information sent from the tire information management center 300 or the maintenance factory management center 410. Note that the communication device 501 may include a storage unit that stores tire information to be transmitted and various types of information to be received.

  In the tire information, not only the internal pressure and temperature of the tire 110 but also vehicle identification information (for example, vehicle ID, serial number), which is unique information for individually identifying the vehicle 100, and the tire 110 are individually identified. Tire identification information (for example, name / size, date of manufacture, tire ID, serial number, rod number), and tire position information (for example, right) Front wheel, left front wheel). The electronic component 500 may be provided on a tire selected from the tires 110 attached to the vehicle 100.

  Next, the management apparatus 301 will be described in detail. The management device 301 is provided in the tire information management center 300. The management device 301 includes a communication unit 311 that receives tire information from the electronic component 500 via the communication device 501 and a CPU 312 that performs processing based on the tire information received by the communication unit 311. In the embodiment, the CPU 312 constitutes a processing unit. In addition, the management device 301 includes a display unit 313 that displays tire information of the measured tire and tire information of tires other than the measured tire. Moreover, the data storage part 314 which memorize | stores various data is provided.

  The communication unit 311 receives various information including tire information from the electronic component 500. Further, when the CPU 312 determines that the tire information is abnormal, the communication unit 311 transmits information indicating abnormality to the vehicle 100 that is the transmission source of the tire information determined to be abnormal. Further, the communication unit 311 transmits information I1, I2 and the like shown in FIG.

  The CPU 312 selects a reference tire as a reference from the plurality of tires 110 on which the electronic component 500 is mounted. That is, it functions as a reference tire selection unit. Further, the CPU 312 calculates tire information of a tire on which the electronic component 500 is not mounted from the tire information of the reference tire and the information related to the mounting position of the reference tire.

  The management device 301 stores a target value database that stores at least a target value of the internal pressure of the tire 110 in the data storage unit 314. That is, the data storage unit 314 functions as a target value storage unit. The management device 301 compares the internal pressure included in the tire information of the measured tire with the target value stored in the target value storage unit. The management device 301 displays a warning on the display unit 313 when the difference between the internal pressure of the measured tire and the target value deviates by ± 5% or more.

  In addition, the management device 301 may store the attachment positions of a plurality of tires mounted on the vehicle 100 and the relationship between individual tire information in the data storage unit 314 in association with each other. In this case, the management device 301 extracts tire information of tires other than the reference tire from the tire information of the reference tire based on the database stored in the data storage unit 314.

  The display unit 313 displays the result calculated by the CPU 312 and information based on the result.

  As described above, the data storage unit 314 stores a table in which tire information for each attachment position is associated with tire information of a reference tire, a target value of tire information (referred to as tire regular information), and the like. The table storage unit 314 can accumulate tire information for a predetermined period.

  Next, the tire 110 in which the electronic component 500 is installed in the tire management system 1 according to the present embodiment will be described. FIG. 3 is a diagram illustrating the tire 110 on which the electronic component 500 is installed. In the tire management system 1 according to the present embodiment, the electronic component 500 that acquires tire information is attached to some of the tires 110 among all tires.

  For example, the electronic component 500 is disposed on the left front wheel FL (referred to as position 1), the left rear wheel outside RLO (referred to as position 3), and the left rear wheel inside RLI (referred to as position 4). An electronic component 500FL is installed on the tire 110 attached to the position 1. An electronic component 500RLO is installed on the tire 110 attached to the position 3. An electronic component 500RLI is installed on the tire 110 attached to the position 4. In addition, the front right wheel FF (position 2), the right rear wheel outside RRO (position 5), and the right rear wheel inside RRI (position 6).

  The tire temperature and internal pressure measured in these electronic components 500FL, 500RLO, and 500RLI are sent from the receiving antennas 511f and 511r to the communication device 501. The communication device 501 transmits the measured tire temperature and internal pressure to the management device 301 installed in the tire information management center 300 via the transmission unit 512.

(3) Operation of Tire Management System Next, a process for calculating tire information of a tire on which the electronic component 500 is not mounted will be described. FIG. 4 is a flowchart for explaining processing for calculating tire information.

  As shown in FIG. 4, in step S <b> 1, the electronic component 500 measures tire information including at least the internal pressure and temperature of the tire 110. In step S2, the electronic component 500 includes measured tire information, vehicle identification information that is unique information for individually identifying the vehicle 100, tire position information that is information on a position where the tire 110 is mounted, and the like. It transmits to the communication apparatus 501 installed in the vehicle 100. The communication device 501 transmits tire information to the management device 301.

  In step S <b> 3, the management device 301 receives tire information from the electronic component 500 via the communication device 501.

  In step S <b> 4, the CPU 312 of the management apparatus 301 selects a reference tire as a reference from the plurality of tires 110 to which the electronic component 500 is mounted. Further, the CPU 312 calculates tire information of tires other than the measured tire from the tire information of the measured tire from the tire information of the reference tire and the information related to the mounting position of the reference tire. The internal pressure of the tire in which the electronic component 500 is not disposed may be calculated and updated periodically, for example, during refueling.

  In step S5, the CPU 312 of the management device 301 compares the target value of the tire information stored in the data storage unit 314 with the tire information of the measured tire and the tire information of tires other than the measured tire.

  In step S <b> 6, when determining that the tire information is abnormal, the CPU 312 transmits information indicating the abnormality to the vehicle 100 that is the transmission source of the tire information determined to be abnormal. Alternatively, a warning is displayed on the display unit 313. For example, when the difference between the internal pressure of the measured tire and the target value deviates by ± 5% or more, the management device 301 determines that there is an abnormality. In step S7, the communication device 501 displays that the tire information is abnormal on a display unit (not shown) provided in the vehicle 100.

  If the received tire information exceeds the target value, the transmission source vehicle 100 is instructed to inspect the tire of the tire 110, the information is instructed to decrease the loading amount of the vehicle, and the vehicle speed is decreased. Information that prompts the user or information notifying that the internal pressure of the tire needs to be adjusted may be transmitted.

  For example, the case where the electronic component 500RLO is attached only to the tire 110 attached to the position 3 and the internal pressure / temperature of the tire 110 can be measured will be described. The internal pressure of the tire 110 varies depending on the air temperature inside the tire 110. Further, the air temperature inside the tire 110 varies depending on the use conditions of the tire (load load, vehicle traveling speed, outside air temperature) and the like. Therefore, a target value is set so as to keep the deflection of the tire 110 constant and exhibit the maximum performance.

 In the present embodiment, it is assumed that the temperature of the environment in which the tire is used is constant at 25 ° C. At this time, the case where the target value of the tire temperature is 85 ° C. or less, the target value of the internal pressure of the tire 110 at the position 1 and the position 2 is 110 psi, and the target value of the internal pressure at the positions 3, 4, 5, 6 is 100 psi is explained. To do.

  The tire temperature of the tire 110 attached to the position 1 is T1. The tire temperature of the tire 110 attached to the position 2 is T2. The tire temperature of the tire 110 attached to the position 3 is defined as T3. The tire temperature of the tire 110 attached to the position 4 is assumed to be T4. The tire temperature of the tire 110 attached to the position 5 is T5. The tire temperature of the tire 110 attached to the position 6 is defined as T6.

At this time, there is the following temperature relationship between the tires with reference to the temperature T3 of the tire 110 attached to the position 3.
T1 = T3-9X (T3-25) / 60
T2 = T3-12X (T3-25) / 60
T4 = T3 + 11X (T3-25) / 60
T5 = T3 + 5X (T3-25) / 60
T6 = T3-5X (T3-25) / 60

  The temperature of the tire 110 in the position 3 that satisfies the above formula is 75.7 ° C. or lower. The internal pressure PX measured in the tire 110 actually mounted at the position 3, the air temperature TX inside the tire, and the converted internal pressure IPA when the measured internal pressure PX is converted into an outside air temperature of 25 ° C.

  The internal pressure during use is PX. The converted internal pressure IPA based on the actual measurement and the target value of the internal pressure are compared and managed with a tolerance of ± 5 psi.

  When the tire coolant is filled inside the tire, assuming that the internal pressure PX and temperature TX measured with electronic components are IPA, the converted internal pressure based on the actual measurement with respect to the outside air temperature of 25 ° C. is as follows.

IPA = [PX− {10 ⁷ × (TX) ⁴ + 5 × 10 ⁻⁶ × (TX) ³ +10 ⁻⁴ × (TX) ² + 11 × 10 ⁻³ × (TX) + W}] × (273 + 25) / (273 + TX) ) + {10 ⁻⁷ × (25) ⁴ + 5 × 10 ⁻⁶ × (25) ³ +10 ⁻⁴ × (25) ² + 11 × 10 ⁻³ × 25 + W
However, -0.8147 <W <1.1853 (W: coefficient of conversion formula)

Further, in the case where the tire is not filled with coolant, assuming that the internal pressure PX and temperature TX measured by the electronic component are IPA, the converted pressure based on the actual measurement with respect to the outside air temperature of 25 ° C. is as follows.
IPA = [PX− {4 × 10 ⁻⁸ × (TX) ⁴ + 2 × 10 ⁶ × (TX) ³ + 4 × 10 ⁻⁵ × (TX) ² + 33 × 10 ⁻⁴ × (TX) + Y}] × (273 + 25 ) / (273 + TX) + {4 × 10 ⁻⁸ × (25) ⁴ + 2 × 10 ⁻⁶ × (25) ³ + 4 × 10 ⁻⁵ × (25) ² + 33 × 10 ⁻⁴ × 25 + Y
However, -0.9437 <Y <1.0563 (Y: coefficient of conversion formula)

(4) Actions / Effects According to the tire management system 1, among all tires mounted on the vehicle 100, directly from the internal pressure and temperature of the tire measured by the electronic component 500 provided on a predetermined measured tire. The internal pressure and temperature of the tire not being measured can be calculated. For this reason, the use condition of the tire which has not installed electronic component 500 can also be monitored.

  Therefore, even if the electronic component 500 fails, it is possible to monitor the use state of all tires from the tire information acquired from the electronic component 500 mounted on another tire that can be measured. Since the tire information of the tire on which the electronic component 500 that can no longer measure the tire information can be calculated from the tire information of other tires, it is possible to cope with an unexpected situation at an early stage.

  Further, according to the present embodiment, the electronic component 500 may not be attached to all the tires 110. Occurrence of a problem due to overwork of the tire 110 on which the electronic component 500 is not mounted can be prevented.

  Further, in the present embodiment, as described above, if the tire is installed only on characteristic tires such as one of the front wheels, one of the rear tires, and one of the outer tires, the tire information of the remaining tires. Therefore, it is possible to reduce the number of electronic components 500 and to suppress initial investment when introducing the tire management system 1 that manages tire information.

  The management device 301 stores the tire information of the tire to be measured in the data storage unit 314 in advance by associating the mounting positions of the plurality of tires mounted on the vehicle 100 with the relationship between the individual tire information. The calculation load on the CPU 312 can be reduced.

  According to the tire management system 1 according to the present embodiment, the management device 301 calculates tire inspection when the measured value exceeds the allowable value from the target value, and the inside of the maintenance shop of the maintenance shop 400 The management center 410 can be notified. As a result, the maintenance factory 400 can grasp the inspection time in advance and prepare for the inspection, so that the work efficiency of inspection work, replacement work, etc. can be improved, and a transportation plan with less loss can be built.

(5) Other Embodiments As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. Should not. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, the embodiment of the present invention can be modified as follows. In the present embodiment, it has been described that the electronic component 500 is disposed in the left front wheel FL, the left rear wheel outer RLO, and the left rear wheel inner RLI. However, it is not limited to this position. It may be a right front wheel FR, a left rear wheel outside RRO, or a left rear wheel inside RRI.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

  DESCRIPTION OF SYMBOLS 1 ... Tire management system, 100 ... Vehicle, 110 ... Tire, 200 ... Excavator, 300 ... Tire information management center, 301 ... Management apparatus, 311 ... Vehicle, 311 ... Communication part, 312 ... CPU, 313 ... Display part, 314 ... Table storage unit, 314 ... Data storage unit, 400 ... Maintenance factory, 410 ... Management center in maintenance factory, 500 ... Electronic component, 500FL, 500RLO, 500RLI ... Electronic component, 501 ... Communication device, 511f, 511r ... Receiving antenna, 512 ... Transmitter, A ... Mining site, B ... Mining site, I1 ... Information, I2 ... Information

Claims (4)

An electronic component that measures at least the internal pressure and temperature of a tire mounted on the vehicle;
A tire management system comprising a management device that manages tire information including at least the internal pressure and temperature of the tire,
The electronic component is
Of the tires mounted on the vehicle, provided on the measured tire,
A measuring unit for measuring tire information including at least the internal pressure and temperature of the tire;
An output unit that outputs the tire information measured by the measurement unit and the attachment position information regarding the attachment position to which the measured tire is attached to the management device;
The management device
A communication unit for receiving the tire information;
From the tire information received by the communication unit and the mounting position information, a processing unit that calculates tire information of a tire other than the measured tire;
A tire management system provided with a display part which displays tire information on the tire to be measured and tire information on tires other than the tire to be measured. The electronic component is provided on a plurality of tires,
The management device
Select a reference tire as a reference from the plurality of tires to be measured,
The tire management system according to claim 1, wherein tire information of a tire not mounted with the electronic component is calculated from tire information of the reference tire and attachment position information of the reference tire. The management device
A storage unit in which the mounting positions of the plurality of tires mounted on the vehicle and the relationship between the individual tire information are stored in association with each other;
The management device
The tire management system according to claim 1, wherein tire information of tires other than the measured tire is extracted from the storage unit based on tire information of the measured tire. The management device
A target value storage unit that stores at least a target value of the internal pressure of the tire;
The management device
Compare the internal pressure included in the tire information of the measured tire and the target value stored in the target value storage unit,
The tire management system according to claim 1, wherein a warning is displayed on the display unit when an internal pressure difference of the measured tire deviates from the target value by ± 5% or more.

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