JP2009234298A - Tire internal pressure management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire internal pressure management system capable of suppressing damage received by the tire and a rim to the minimum by finding abnormality by reduction of the internal pressure of the tire in an early stage and prolonging the lifetime of the tire and the rim. <P>SOLUTION: The tire internal pressure management system is provided with a detection device 110 for at least measuring the internal pressure of the tire attached to the vehicle, and a tire information management center 300 for managing tire information including at least an internal pressure value of the tire output by the detection device 110. The tire information management center 300 is provided with: a communication part 310 for receiving the tire information measured by the detection device 110; a data memory part 330 for memorizing the tire information received by the communication part 310; and CPU 340 for determining whether or not the internal pressure value is normal by comparing past information, i.e., tire information memorized in the data memory part 330 with present information, i.e., the present tire information received by the communication part 310 when the internal pressure value is within an allowance range. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tire internal pressure management system, and in particular, a detection device 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 an internal pressure value of a tire output by the detection device. A tire internal pressure management system.

  Conventionally, users who handle multiple large vehicles such as expensive trucks (for example, carriers that use multiple trucks for transportation) have tire internal pressure or tire internal temperature that is the air temperature inside the tire. In consideration of reducing fuel consumption due to a decrease in tire condition such as tire temperature, which is the temperature of the tire itself, tire conditions are frequently checked for each vehicle.

  That is, in recent years, in order to make it easier to grasp the state of the tire from a long distance, a detection device that measures the state of the tire is attached to a tire mounted on a large vehicle (see, for example, Patent Document 1).

In particular, the internal pressure of the tire is the internal pressure value itself measured by the detection device, the internal pressure measurement value obtained by correcting the internal pressure value measured by the detection device with the tire internal temperature or the tire temperature, the internal pressure value and the internal pressure value. It is managed by the degree of change from the internal pressure measurement value.
JP 2000-204872 A

  However, in the above-described conventional technology, the tire internal pressure is managed based on the internal pressure value measured by the detection device. There was a problem that it was difficult to notice that it occurred.

  In other words, according to the conventional technology, when the internal pressure value measured by the detection device is within an allowable range when measured by the detection device when a tire or rim failure occurs due to air leakage, the tire or rim is used for several days. In some cases, it may not be noticed that there is a problem with the tire, and damage to the tire or rim may be exacerbated.

  Therefore, the present invention has been made in view of such a situation, and an abnormality due to a decrease in the internal pressure of the tire is detected at an early stage, and damage to the tire and rim is suppressed to the minimum, and the life of the tire and rim is reduced. An object of the present invention is to provide a tire internal pressure management system capable of extending the tire width.

  In order to solve the above-described problems, the present invention has the following features. First, the invention according to the first feature includes a detection device 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 value of the tire output by the detection device. The management device stores the communication unit that receives tire information measured by the detection device, the storage unit that stores tire information received by the communication unit, and the storage unit when the internal pressure value is within an allowable range. A processing unit that compares past information that is tire information and current information that is current tire information received by the communication unit to determine whether the internal pressure value is normal. To do.

  According to this feature, it is possible to accurately evaluate whether the internal pressure value is within an allowable range and the internal pressure value is normal by comparing the past information with the current information. Can be detected early. As a result, damage to the tire and rim can be minimized and the life of the tire and rim can be extended.

  The gist of another aspect of the invention is that the tire information includes a temperature value including a tire internal temperature that is a temperature inside the tire or a tire temperature that is a temperature of the tire itself.

  The gist of the invention according to another feature is that the past information includes a past internal pressure value and a past tire use internal pressure value in which the past internal pressure value is corrected using at least a temperature value.

  In another aspect of the invention, the past information further includes a past appropriate result obtained by comparing a past internal pressure value at the time of tire use and a past tire set target internal pressure value that is an appropriate internal pressure value at the time of tire use. Is the gist.

  The gist of the invention according to another feature is that the current information includes a current internal pressure value and a current tire use internal pressure value corrected by using at least a temperature value.

  In another aspect of the invention, the current information further includes a current appropriate result in which the current internal pressure value when the tire is used is compared with the current tire set target internal pressure value that is an appropriate internal pressure value when the tire is used. Is the gist.

  In another aspect of the invention, the processing unit compares the past appropriate result calculated from the past information stored in the storage unit for a certain period of time with the current appropriate result calculated from the current information received by the communication unit. The gist is to do.

  In the invention according to another feature, when the processing unit determines that an abnormality has occurred in the internal pressure value, the tire or rim abnormality information is transmitted to the vehicle that is the transmission source of the tire information via the communication unit. The gist is to do.

  The gist of another aspect of the invention is that the storage unit accumulates a history of tire information for at least two days.

  According to the present invention, there is provided a tire internal pressure management system capable of detecting an abnormality due to a decrease in tire internal pressure at an early stage, minimizing damage to the tire or rim, and extending the life of the tire or rim. be able to.

  Next, an example of a tire internal pressure management system according to the present invention will be described with reference to the drawings. 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 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.

(Configuration of tire internal pressure management system)
First, a schematic configuration of a tire internal pressure management system in the present embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a schematic configuration of a tire internal pressure management system in the present embodiment.

  As shown in FIG. 1, the tire internal pressure management system 1 is roughly constituted by a plurality of vehicles 100 (large vehicles such as trucks), an excavator 200, a tire information management center 300 (management device), and a maintenance factory 400. Has been.

  The vehicle 100 transports mineral resources at the mining sites A, B,... To corresponding destinations. The excavator 200 loads mineral resources on the vehicle 100.

  The tire information management center 300 wirelessly receives tire information including at least an internal pressure value output by the detection device 110 attached to each of the plurality of vehicles 100.

  As will be described in detail later, the tire information management center 300 manages, for each vehicle 100, tire information including at least an internal pressure value output by a detection device 110 attached to each of the plurality of vehicles 100. .

  For example, when an abnormality occurs in the tire or rim of the vehicle 100 that is the transmission source of the tire information, the tire information management center 300 performs abnormality information informing that the abnormality has occurred, or checks the tire at the maintenance factory 400. 1 is transmitted to the vehicle 100, or a plurality of travel routes (the travel routes shown in FIG. 1) for the vehicle 100 to go from the current position to the destination. 1 or the like to transmit information that informs the travel route (information 2 shown in FIG. 1) that is the least burdened on the tire.

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

  Next, the internal configuration of the tire internal pressure management system 1 in the present embodiment will be described with reference to FIG. FIG. 2 is a diagram showing an internal configuration of the tire internal pressure management system 1 in the present embodiment.

  As shown in FIG. 2, the vehicle 100 includes a detection device 110 that is fixed to a tire or a rim R on which the tire is assembled, and a communication device 120 that is fixed to the vehicle 100.

  The detection device 110 measures a tire state such as a tire internal pressure, a tire internal temperature that is an air temperature inside the tire, and a tire temperature that is a temperature of the tire itself. The detection device 110 uses the signal received from the communication device 120 as power, and transmits the measured tire state to the communication device 120 as tire information.

  The communication device 120 transmits the tire information transmitted from the detection device 110 and received to the tire information management center 300. The communication device 120 receives various information from the tire information management center 300 or the maintenance shop management center 410. Of course, the communication device 120 may include a storage unit that stores and accumulates various information such as tire information.

  Here, in the tire information, not only the internal pressure value that is the value of the internal pressure of the tire, the temperature value that includes the tire internal temperature or the tire temperature, but vehicle identification information that is unique information for identifying the vehicle 100 individually. (E.g., vehicle ID, serial number), tire identification information (e.g., name / size, date of manufacture, tire ID, serial number, rod number), which is unique information for individually identifying the tire, Tire position information (for example, right front wheel, left front wheel), which is information on a position where the vehicle is mounted, is included.

  The tire information management center 300 includes a communication unit 310, a display unit 320, a data storage unit 330 (storage unit), and a CPU 340 (processing unit).

  The communication unit 310 performs communication connection between the tire information management center 300 and the maintenance factory 400, and between the tire information management center 300 and the vehicle 100, and transmits and receives various types of information such as tire information.

  For example, the communication unit 310 performs communication connection between the plurality of vehicles 100 and the tire information management center 300, and receives the tire information output by the detection device 110 wirelessly. Further, when the CPU 340 determines that an abnormality has occurred in the internal pressure value, the communication unit 310 transmits tire or rim abnormality information to the vehicle 100 (communication device 120), which is a tire information transmission source.

  The display unit 320 displays an appropriate result obtained by the CPU 340 and information stored in the data storage unit 330. The data storage unit 330 stores and accumulates tire information received by the communication unit 310. The data storage unit 330 stores a history of tire information for at least two days.

  The CPU 340 (1) “normal evaluation method” for determining whether or not the current internal pressure value is within the allowable range, and (2) whether or not the current internal pressure value is normal compared to the past internal pressure value. The “comparison evaluation method” is performed.

(1) Normal Evaluation Method First, a normal evaluation method for determining whether or not the current internal pressure value in the current tire information received by the communication unit 310 is within the allowable range will be described. In the normal evaluation method, the current internal pressure value is simply indicated as an internal pressure value (IP).

  The CPU 340 uses the current internal pressure value included in the tire information as it is, and compares it with the “tire setting target internal pressure value (IP2)” which is an appropriate internal pressure value when using the tire, whereby the internal pressure value (IP), that is, Whether the internal pressure value (IP) is appropriate may be evaluated.

  Further, as shown in (1) and (2) below, the CPU 340 converts the internal pressure value included in the tire information so that the internal pressure value (IP), that is, the current internal pressure value (IP) is appropriate. You may evaluate whether it exists.

(A) When the liquid for cooling the tire is enclosed in the tire CPU 340 includes “internal pressure value (IP)”, “temperature value (TI)” included in the tire information received by the communication unit 310, and Based on the “average temperature (TA) of one month in the mine”, the internal pressure value (IP) is converted into the “internal pressure value during tire use (IP1)”, which is the internal pressure value when using the tire, by the following formula 1. to correct.

  Further, the CPU 340 uses the following formulas 1 to 3 to compare the internal pressure value in the “tire set target internal pressure value (IP2)”, which is an appropriate internal pressure value when using the tire, with the internal pressure value when using the tire (IP1). It is determined whether or not the value IP is appropriate, and an appropriate result (current appropriate result) is calculated. That is, the CPU 340 determines whether or not the temperature value (TI) and the internal pressure value (IP) with respect to the average temperature (TA) of the mine for one month are appropriate.

For example, if the difference between the tire use internal pressure value (IP1) and the tire set target internal pressure value (IP2) is within an allowable range, the CPU 340 determines that the internal pressure value IP is appropriate. Note that the average temperature (TA) for one month in the mine is measured by a sensor 110 (not shown) provided in the tire information management center 300 or the like provided in the tire.

  However, IPA is a recommended internal pressure value of a tire recommended by TRA or the like.

  As described above, when the tire is filled with a liquid for cooling the tire, the internal pressure value of the tire is easily changed by vaporizing the liquid. For this reason, as described above, the CPU 340 uses the internal pressure value (IP), the temperature value (TI), and the monthly average temperature (TA) of the mine to use the internal pressure value included in the tire information received by the communication unit 310. (IP) is converted into an internal pressure value (IP1) when the tire is used. Then, the CPU 340 compares the tire internal pressure value (IP1) and the tire set target internal pressure value (IP2) by using the above formulas 1 to 3, thereby determining the internal pressure value (IP), that is, the current internal pressure. Whether the value (IP) is appropriate (currently appropriate result) can be evaluated with high accuracy.

(B) When the tire cooling liquid is not sealed inside the tire CPU 340 includes “internal pressure value (IP)”, “temperature value (TI)” included in the tire information received by the communication unit 310, and The internal pressure value (IP) is converted (corrected) into “internal pressure value during tire use (IP1)” according to the following formula 4 based on “average temperature (TA) of one month of mine”.

  Further, the CPU 340 determines whether or not the internal pressure value IP is appropriate in the comparison between the tire use internal pressure value (IP1) and the tire set target internal pressure value (IP2) according to the following expressions 4 to 6. Calculate the result (currently appropriate result). That is, the CPU 340 determines whether or not the temperature value (TI) and the internal pressure value (IP) with respect to the average temperature (TA) of the mine for one month are appropriate.

For example, if the difference between the tire use internal pressure value (IP1) and the tire set target internal pressure value (IP2) is within an allowable range, the CPU 340 determines that the internal pressure value IP is appropriate.

  Note that the measured value may deviate from the true value depending on the location where the detection device is provided. Therefore, the temperature value TI included in the tire information may be corrected by an input operation, or by a specific formula. It may be corrected.

  As described above, the internal pressure value when the liquid for cooling the tire is not sealed inside the tire is different from the internal pressure value when the liquid is sealed due to the vaporization of the liquid. For this reason, as described above, the CPU 340 uses the internal pressure value (IP), the temperature value (TI), and the monthly average temperature (TA) of the mine to use the internal pressure value included in the tire information received by the communication unit 310. (IP) is converted into an internal pressure value (IP1) when the tire is used. Then, the CPU 340 compares the tire use internal pressure value (IP1) and the tire set target internal pressure value (IP2) by using the above formulas 4 to 6, so that the internal pressure value (IP)), that is, the current Whether or not the internal pressure value (IP) is appropriate (current appropriate result) can be evaluated with high accuracy.

(2) Comparative Evaluation Method Next, a comparative evaluation method for determining whether or not the current internal pressure value is normal compared to the past internal pressure value will be described with reference to FIGS. 3 and 4. FIG. 3 is a configuration diagram showing tire information in the present embodiment, and FIG. 4 is a graph showing an example of a comparative evaluation method in the present embodiment.

  When the current internal pressure value (IP) is within the allowable range in the normal evaluation method (1) described above, the CPU 340 and past information that is past tire information stored in the data storage unit 330, and the communication unit 310 Is compared with the current information which is the current tire information received by the above, and it is evaluated whether or not the current internal pressure value (IP) is normal (changed).

  As shown in FIG. 3, the tire information includes past information that is tire information measured in the past and stored in the data storage unit 330, and current information that is current tire information received by the communication unit 310. And are included. That is, all the tire information before the current information becomes past information.

  The past information includes a past internal pressure value (IP), a past tire use internal pressure value (IP1), and a past appropriate result.

  The past internal pressure value (IP) is the internal pressure value (IP) itself stored in the data storage unit 330. The past internal pressure value (IP1) when the tire is used is the past internal pressure value (IP), the past temperature value (TI), and the past one month average temperature (TA) of the mine. IP) is corrected. The past appropriate result is a result obtained by comparing a past tire use internal pressure value (IP1) with a past tire set target internal pressure value (IP2). In addition, the various information contained in these past information is measured by the method similar to the normal evaluation method (1) mentioned above.

  On the other hand, the current information includes the current internal pressure value (IP), the current tire internal pressure value (IP1), and the current appropriate result.

  The current internal pressure value (IP) is the current internal pressure value (IP) itself received by the communication unit 310. The current tire internal pressure value (IP1) is the current internal pressure value (IP), the current temperature value (TI), and the current average monthly mine temperature (TA) (TA). IP) is corrected. The current appropriate result is a result obtained by comparing and evaluating the current tire use internal pressure value (IP1) and the current tire set target internal pressure value (IP2). In addition, the various information contained in present information is measured by the method similar to the normal evaluation method (1) mentioned above.

  Specifically, the CPU 340 displays the past appropriate result in the past information for a certain period (for example, one month) stored in the data storage unit 330 and the current appropriate result in the current tire information received by the communication unit 310. Compare.

  For example, as shown in FIG. 4A, the difference A between the current tire use internal pressure value (IP1) and the current tire set target internal pressure value (IP2) is the past tire use internal pressure value (IP1). If it is smaller than the difference B from the past tire set target internal pressure value (IP2), it is determined that the current internal pressure value (IP) is appropriate.

  On the other hand, as shown in FIG. 4B, the difference A between the current tire use internal pressure value (IP1) and the current tire set target internal pressure value (IP2) is the past tire use internal pressure value (IP1). If it is larger than the difference B from the past tire setting target internal pressure value (IP2), it is determined that the current internal pressure value (IP) is not appropriate.

  Here, the CPU 340 compares the past appropriate result with the current appropriate result, the difference A between the current tire use internal pressure value (IP1) and the current tire set target internal pressure value (IP2), and the past tire use time. In addition to comparing the difference B between the internal pressure value (IP1) and the past tire set target internal pressure value (IP2), other past information is compared with other current information (for example, the past internal pressure value (IP) and It is also possible to measure whether or not the current internal pressure value (IP) is normal (changed) by comparing only with the current internal pressure value (IP).

  If the past information stored in the data storage unit 330 for a certain period is for at least two days, the CPU 340 compares the past information with the current information to check whether the current internal pressure value (IP) is normal. Can be measured.

  Thus, the CPU 340 performs the comparative evaluation method (2) in addition to the above-described normal evaluation method (1), so that the current internal pressure value (IP) is within the allowable range by the normal evaluation method (1). Even in this case, the past information and the current information can be compared to evaluate whether the current internal pressure value (IP) is normal or not. Can be detected early.

(Operation of tire internal pressure management system)
Next, operation | movement of the tire internal pressure management system 1 which concerns on this Embodiment is demonstrated, referring FIG.5 and FIG.6. FIG. 5 is a diagram illustrating the operation of the tire internal pressure management system according to the present embodiment, and FIG. 6 is a diagram illustrating the contents of tire information according to the present embodiment.

  As shown in FIG. 5, in S <b> 101, the detection device 110 mounted on the vehicle 100 measures tire conditions such as tire internal pressure, tire internal temperature, and tire temperature. And the detection apparatus 110 transmits the state of the measured tire to the communication apparatus 120 as tire information as shown in FIG.

  In S <b> 103, the communication device 120 attached to the vehicle transmits the tire information (see FIG. 6) transmitted from the detection device 110 and received to the tire information management center 300. At this time, the communication device 120 may store / accumulate various information such as tire information in the storage unit.

  In S105, the CPU 340 provided in the tire information management center 300 evaluates whether or not the current internal pressure value in the tire information received via the communication unit 310 is within the allowable range by the normal evaluation method (1).

  In S107, the data storage unit 330 provided in the tire information management center 300 stores and accumulates the results (current appropriate results) evaluated in S105. At this time, the display unit 320 provided in the tire information management center 300 can display tire information such as the result evaluated in S105. Of course, the display unit 320 can also display past information and the like stored in the data storage unit 330.

  In S109, the CPU 340 provided in the tire information management center 300 moves to the processing in S111 when the current internal pressure value is within the allowable range (no abnormality) as a result of the evaluation in S105, and the current internal pressure value is within the allowable range. If it is not within (there is an abnormality; see the hatched portion shown in FIG. 6), the process proceeds to S117.

  In S111, the CPU 340 provided in the tire information management center 300 evaluates whether or not the current internal pressure in the tire information received via the communication unit 310 is normal by the comparative evaluation method (2).

  In S113, the data storage unit 330 provided in the tire information management center 300 stores and accumulates the results (current appropriate results) evaluated in S111. At this time, the display unit 320 provided in the tire information management center 300 can display tire information such as the result evaluated in S111. Of course, the display unit 320 can also display past information and the like stored in the data storage unit 330.

  In S115, the CPU 340 provided in the tire information management center 300 ends this processing when the current internal pressure value is normal compared to the past information (no abnormality) as a result of the evaluation in S111, and ends the current internal pressure. If the value is not normal compared to the past information (abnormality; refer to the shaded area shown in FIG. 6), the process proceeds to S117.

  In S <b> 117, the CPU 340 provided in the tire information management center 300 transmits tire or rim abnormality information to the vehicle 100 that is the transmission source of tire information via the communication unit 310. The vehicle 100 can confirm the abnormality of the tire or the rim by outputting the evaluation result such as the received abnormality information by sound or displaying it by an image.

  In the tire internal pressure management system 1, the data storage unit 330 has been described as storing the current appropriate result after S107 and after S105, and S113 after S111. However, the data storage unit 330 is not necessarily performed in this order. For example, S107 and S113 may be performed together. In this case, after the CPU 340 transmits the abnormality information to the vehicle 100 in S117, the data storage unit 330 may store all the various information including the transfer information and the like.

(Action / Effect)
According to the tire internal pressure management system 1 according to the present embodiment described above, by performing the comparative evaluation method (2) in addition to the normal evaluation method (1), the current internal pressure value ( Even if IP) is within the allowable range, it is possible to compare the past information with the current information and evaluate whether the current internal pressure value (IP) is normal or not with high accuracy. Abnormalities due to lower internal pressure can be detected at an early stage. As a result, damage to the tire and rim can be minimized and the life of the tire and rim can be extended.

  Even if the internal pressure of the tire does not increase or decrease, the current internal pressure value varies depending on the temperature value (tire internal temperature, tire temperature, etc.). Further, the tire performance (for example, wear and fuel consumption) can be maximized when used in a state where the internal pressure is kept constant.

  For example, when the current temperature value of the tire mounted on the vehicle 100 (the left front wheel) is 20 degrees and the tire setting target internal pressure value is 100 psi, only the normal evaluation method (1) is performed and the normal evaluation is performed. In addition to the method (1), the comparative evaluation method (2) was compared.

  When only the normal evaluation method (1) is performed, as shown in FIG. 7 (a), the current internal pressure value decreases after three weeks, but the current internal pressure value is within the allowable range. The tire was used by returning the internal pressure of the tire to the target internal pressure value. After that, since the current internal pressure value is within the allowable range, the tire internal pressure is returned to the tire set target internal pressure value three times at 2.5 weeks, 2.0 weeks, and 1.5 weeks, and the tire is used continuously. It was.

  However, one week later, the current internal pressure value decreased, and the period during which the current internal pressure value decreased was shortened. Was progressing to the point where it could not be repaired. For this reason, the tire remained about 50 mm before the tread portion was completely worn, and could not be used until it was completely worn.

  On the other hand, when the comparative evaluation method (2) is performed in addition to the normal evaluation method (1), the current internal pressure value is within the allowable range as shown in FIG. ), It was evaluated that the current internal pressure value (IP) was not normal. Therefore, when the tire was inspected, there was a slight cut flaw. After repairing this cut flaw, the internal pressure of the tire (current internal pressure value) did not decrease, and the tire could be used until the tread portion was completely worn.

  As a result of performing such an experiment several times, the error when the internal pressure value (IP) is measured by the same detection device 110 is about ± 1 psi at the maximum, and the internal pressure of the tire due to abnormality of the tire or rim R The reduction was found to be at least 1 psi.

  Thus, by performing the comparative evaluation method (2) in addition to the normal evaluation method (1), even if the current internal pressure value (IP) is within the allowable range by the normal evaluation method (1). Furthermore, by comparing the past information with the current information and evaluating whether or not the current internal pressure value (IP) is normal, an abnormality due to a decrease in tire internal pressure can be detected early.

  In other words, when the driver of the vehicle 100 moves the currently driving vehicle 100 from the mining site to the maintenance shop 400 by looking at the information prompting the tire inspection, the tire internal pressure management system 1 will fail. Vehicle 100 equipped with tires with a high possibility of occurrence of accidents (hereinafter referred to as vehicles with high possibility of occurrence of tires) compared to the conventional vehicle, while vehicle 100 with tires with a low possibility of occurrence of failures (hereinafter referred to as occurrences) The possibility of low-tire-equipped vehicles) can be increased as compared with the conventional case, and the overall transport efficiency can be increased.

  In addition, as a result of the movement of the high possibility tire-equipped vehicle to the maintenance factory 400, the waiting time for loading the low possibility tire-equipped vehicle is shortened by the amount of the high possibility tire-equipped vehicle at the mining site. Therefore, the low-possibility tire-equipped vehicle can increase the efficiency of carrying crushed stones within a predetermined time.

  In addition, since the driver of the vehicle 100 can reduce the current speed by looking at the abnormality information, the vehicle 100 does not place a large burden on the tire as much as the speed of the vehicle 100 decreases. The loaded crushed stone can be appropriately transported to the destination.

(Example of change)
The vehicle 100 may include a position specifying unit (not shown) that transmits the current position and destination of the vehicle 100 to the tire information management center 300 every predetermined time. Examples of the position specifying unit include GPS.

  When the tire information management center 300 determines that the current internal pressure value is not normal by the normal evaluation method (1) and the comparative evaluation method (2), the tire 100 transmission source vehicle 100 moves from the current position to the destination. Among the multiple driving routes to go to, a driving route that does not place a large burden on the tire (for example, a driving route that has a short distance to the destination, a driving route that has good road surface conditions to the destination, and a tire temperature rise is suppressed. To select the travel route to be used) or to select the information for adjusting the tire internal pressure, and to perform the selected travel route and the tire internal pressure adjustment to the vehicle 100 that is the transmission source of the tire information. May be transmitted together with the abnormality information.

  For example, the tire information management center 300 reduces the distance between the current position of the vehicle 100 and the destination as the current evaluation result (current internal pressure value) evaluated by the normal evaluation method (1) deviates from the allowable range. A plurality of travel routes are stored in advance. When the current internal pressure value is not within the allowable range, the tire information management center 300 selects a travel route according to the degree to which the current internal pressure value is out of the allowable range from the plurality of travel routes. Information including the travel route is transmitted to the vehicle 100 that is the transmission source of the tire information.

  As a result, when the vehicle 100 moves along a shorter travel route or the like, the temperature rise of the tire is suppressed, and it is difficult to apply a large burden to the tire. Therefore, the vehicle 100 appropriately transports the loaded crushed stone to the destination. be able to.

  Note that the allowable range may include a specific allowable value that is likely to cause a failure of the tire or the rim R. When the current internal pressure value reaches a specific allowable value, the tire information management center 300 applies a tire information to a tire from among a plurality of travel routes for the tire information transmission source vehicle 100 from the current position to the destination. It is also possible to select a travel route that is difficult to apply a large burden and transmit travel route information indicating the selected travel route to the vehicle 100 that is the transmission source of the tire information. The specific permissible value is a value determined by experiment or simulation.

  Here, an example in which the tire information management center 300 according to this modified example transmits travel route information to the vehicle 100 will be described.

  It is assumed that the plurality of travel routes for the vehicle 100 to go from the current position to the destination include the travel route 1 and the travel route 2 in which a larger load is not applied to the tire than the travel route 1. (See FIG. 1). The maximum allowable range is 85 ° C., and the specific allowable value is 80 ° C.

  If the current internal pressure value received from the vehicle 100 reaches the maximum allowable value of 85 ° C. when the vehicle 100 is traveling via the travel route 1, the tire information management center 300 determines the tire information. In order to reduce the burden on the tire of the vehicle 100 as the transmission source, the travel route information indicating the travel route 2 in which the tire is less likely to be burdened than the travel route 1 may be transmitted.

  In this case, the driver of the vehicle 100 changes the current travel route 1 to the travel route 2 by referring to the received travel route information, and the current travel speed in order to further reduce the tire burden. It is possible to drive at a traveling speed (here 30 km / h) lower than (here 60 km / h), and it is possible to prevent a tire failure.

  However, on the travel route 2, the following vehicle following the vehicle 100 must also match the travel speed of the vehicle 100 (here, 30 km / h). For this reason, the vehicle 100 and the following vehicle in the travel route 2 cannot quickly transport the load to the destination, and the transport efficiency as a whole may be reduced.

  However, in this modified example, the tire information management center 300 does not transmit the travel route information to the vehicle 100 when the current internal pressure value reaches the maximum value 85 ° C. of the allowable range, but the maximum value of the allowable range. The travel route information is transmitted to the vehicle 100 when the current internal pressure value reaches the specific allowable value 80 ° C. lower than 85 ° C. Accordingly, the tire information management center 300 can transmit the travel route information to the vehicle 100 more quickly.

  For this reason, the driver of the vehicle 100 moving along the travel route 1 is less likely to place a greater burden on the tire than the travel route 1 before the current internal pressure value of the tire reaches the maximum allowable value of 85 ° C. Since the load on the tire can be reduced at an early stage by changing to the travel route 2, it is possible to drive to the destination without excessively reducing the travel speed on the travel route 2, and to increase the travel speed of the following vehicle. It can be prevented from lowering. Thereby, the vehicle 100 and the following vehicle in the travel route 2 can prevent the overall transport efficiency from being lowered.

  If the current internal pressure value is not within the allowable range, the tire information management center 300 calculates a tire inspection prediction time based on a temporal change in the current internal pressure value, and the vehicle 100 that is the tire information transmission source. The inspection prediction time may be transmitted to the maintenance factory 400 that inspects.

  Thereby, since the employee of the maintenance shop 400 can grasp | ascertain beforehand the inspection time of the tire with which the vehicle 100 was mounted | worn, before accepting the vehicle 100 with which the tire with the high possibility of a failure generation is received, the Preparations for performing tire inspection (for example, adjustment of tire inspection and ordering of necessary tires) can be made.

  In addition, when the predicted inspection time is transmitted to the maintenance factory 400, the maintenance factory 400 is predicted to receive the vehicle 100 corresponding to the predicted inspection time. The situation in which the value must be changed greatly is reduced.

  In addition, the tire information management center 300 corrects the current internal pressure value included in the tire information when the “current temperature value” included in the tire information is not within the allowable range and the current temperature value or the like. If the “current tire use internal pressure value” is not within the allowable range, it is evaluated that an abnormality has occurred in the current internal pressure value, and the abnormality information is transmitted to the vehicle 100 that is the tire information transmission source. Good.

  Here, the tire pressure and temperature are closely related to each other. When the tire pressure is lower than normal, the tire is greatly bent and the tire temperature rises. Thus, if the “current temperature value” is not within the allowable range, there is a high possibility that the current internal pressure value is not within the allowable range. For this reason, the tire information management center 300 evaluates that an abnormality has occurred in the current internal pressure value in conjunction with the “current temperature value” not being within the allowable range, and the tire information transmission source vehicle 100 is evaluated. By transmitting the abnormality information, a failure such as a burst of the vehicle 100 can be prevented in advance.

  If the current internal pressure value is not within the allowable range, the tire information management center 300 may transmit that fact to the maintenance factory 400 that inspects the vehicle 100 that is the transmission source of the tire information. In the maintenance factory 400, when the maintenance center management center 410 receives the above notification, the inspection date and time of the vehicle 100 (for example, ID-E1 shown in FIG. 8) as the transmission source of the tire information is displayed. You may reset with priority over inspection date (for example, ID-E1 shown in FIG. 9).

  Further, the maintenance factory management center 410 may store maintenance information such as a tire inspection date and time, a tire remaining groove depth, and the like in a storage unit (such as an IC chip) provided in the tire. In this case, in the maintenance factory management center 410, the vehicle 100 transmits tire information and maintenance information to the tire information management center 300, and the tire information management center 300 manages the maintenance information and tire information for each vehicle. Is also possible. Thereby, the carrier who manages a plurality of vehicles 100 can grasp the maintenance situation of a plurality of vehicles 100 instantly, and can prevent failure of a tire beforehand.

[Other embodiments]
As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention.

  Specifically, the detection device 110 and the communication device 120 provided in the vehicle 100 have been described as transmitting and receiving wirelessly. However, the detection device 110 and the communication device 120 do not necessarily need to be wireless, and may of course transmit and receive by wire. Good.

  From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art. 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.

It is a figure which shows schematic structure of the tire internal pressure management system in this Embodiment. FIG. 2 is a diagram showing an internal configuration of the tire internal pressure management system 1 in the present embodiment. It is a block diagram which shows the tire information in this Embodiment. It is a graph which shows an example of the comparative evaluation method in this Embodiment. It is a figure which shows operation | movement of the tire internal pressure management system which concerns on this Embodiment. It is a figure which shows the content of the tire information which concerns on this Embodiment. It is a graph which shows an example of the normal evaluation method in this Embodiment, and a comparative evaluation method. It is a figure which shows the tire check date for every vehicle which concerns on the example of a change (the 1). It is a figure which shows the tire check date for every vehicle which concerns on the example of a change (the 2).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Tire internal pressure management system 100 ... Vehicle 110 ... Detection apparatus 120 ... Communication apparatus 200 ... Excavator car 300 ... Tire information management center (management apparatus)
310 ... Communication unit 320 ... Display unit 330 ... Data storage unit 340 ... CPU (processing unit)
400 ... Maintenance factory 410 ... Maintenance factory management center

Claims (9)

A detection device for measuring at least the internal pressure of a tire mounted on the vehicle;
A management device that manages the tire information including at least the internal pressure value of the tire output by the detection device;
The management device
A communication unit for receiving the tire information measured by the detection device;
A storage unit for storing the tire information received by the communication unit;
When the internal pressure value is within an allowable range, the past information that is the tire information stored in the storage unit is compared with the current information that is the current tire information received by the communication unit, A tire internal pressure management system comprising: a processing unit that determines whether or not the internal pressure value is normal.   2. The tire internal pressure management system according to claim 1, wherein the tire information includes a tire internal temperature that is a temperature inside the tire or a temperature value that is a tire temperature that is a temperature of the tire itself. The past information is
Past internal pressure values,
The tire internal pressure management system according to claim 2, further comprising: a past tire use internal pressure value in which the past internal pressure value is corrected using at least the temperature value. The past information is
4. The tire according to claim 3, further comprising a past appropriate result obtained by comparing the past internal pressure value when the tire is used and a past tire setting target internal pressure value that is an appropriate internal pressure value when the tire is used. Internal pressure management system. The current information is
Current internal pressure value and
3. The tire internal pressure management system according to claim 2, wherein the tire internal pressure management system includes a current tire internal pressure value corrected with the current internal pressure value using at least the temperature value. 4. The current information is
The tire according to claim 5, further comprising a current appropriate result obtained by comparing the current internal pressure value when the tire is used and a current tire set target internal pressure value, which is an appropriate internal pressure value when the tire is used. Internal pressure management system.   The processing unit compares the past appropriate result calculated from the past information for a certain period stored in the storage unit and the current appropriate result calculated from the current information received by the communication unit. The tire internal pressure management system according to claim 4 or 6, wherein:   When the processing unit determines that an abnormality has occurred in the internal pressure value, the communication unit transmits abnormality information of the tire or rim to the vehicle that is a transmission source of the tire information. The tire internal pressure management system according to claim 1.   The tire internal pressure management system according to claim 1, wherein the storage unit accumulates a history of the tire information for at least two days.

Images