JP5151573B2 - Tire wear state detection system, apparatus and method, and tire - Google Patents

Description

  The present invention relates to a tire wear state detection system, apparatus and method, and a tire.

  Conventionally, tires of vehicles traveling on roads such as passenger cars, buses, trucks, and the like are so-called slip signs so that a user such as a vehicle driver can grasp the wear state of a tread that is a rubber layer of a tire ground contact portion. It has. The slip sign is a block formed at the bottom of a part of the groove in the tread, and is exposed on the tread surface when the wear of the tread progresses to such an extent that the tire is replaced with a new one and the groove becomes shallow. Therefore, when the user visually inspects the tread of the tire in the inspection before the vehicle operation or the like, the user recognizes that the slip sign is exposed on the surface of the tread, thereby replacing the tire with a new one. It is possible to grasp that the wear of the tread has progressed.

  However, the slip sign is not a strict index indicating the wear state of the tread, but is merely a rough guide. Therefore, the determination of the wear state of the tread based on the slip sign exposed on the tread surface varies depending on individual users. In addition, there are users who do not perform inspections before vehicle operation or the like and continue to operate the vehicle without recognizing that the slip sign is exposed on the tread surface. If tires with excessively worn treads are used continuously, there is a concern that slipping may occur during traveling of the vehicle or the tires may burst, resulting in a dangerous state.

Therefore, a technique related to a tire state estimation device has been proposed in which a sensor is embedded in a groove formed in a tire tread to detect a wear state of the tread and the like (see, for example, Patent Document 1). The state of the tread of the tire can be estimated based on the output of the sensor, whereby the wear state of the tread can be accurately grasped and the tire can be replaced with a new one at an appropriate timing.
JP 2005-170223 A

  However, in the conventional apparatus, the sensor needs to have a function of detecting the state quantity. Therefore, the cost of the sensor is increased, and the cost of the tire in which the sensor is embedded is also increased.

  Also, since the tread state is estimated based on information from the sensor that has fluctuated due to changes in the rigidity of the blocks formed on the tire tread, the tire condition due to temperature and the secular change can be improved in order to improve the accuracy of the estimation. Parameters such as tire rubber curing are required as information. Therefore, it is necessary to improve the detection performance of the sensor and to make the device attached to the vehicle highly functional.

  Furthermore, since the tread state is estimated based on the vibration frequency, the state quantity cannot be detected when the vehicle is stopped, and the state quantity cannot be detected when traveling at an extremely low speed. However, it is expected that the estimation accuracy will be lowered.

  Further, since the shape of the groove for embedding the sensor differs for each tire manufacturer, type, and size, it is necessary to prepare a large number of sensor sizes.

  The present invention solves the above-mentioned conventional problems by embedding an IC tag in a tread of a vehicle tire and detecting the wear state of the tread based on the communication state with the IC tag. Low-cost and reliable tire wear state detection system, apparatus and method, and tire capable of accurately grasping the wear state and notifying a vehicle driver of a warning regarding the wear state of the tire tread The purpose is to provide.

Therefore, in the tire wear state detection system of the present invention, an IC tag embedded in a tread of a vehicle tire, a communication antenna disposed on or near a road surface, the IC tag, detecting the state of wear of the tread based on the communication state with the communication antenna, have a detection unit that outputs a warning in response to the wear state, the IC tag, the radio wave blocking member embedded in the tread Embedded in a hidden position, the detection unit detects that the tread is worn when the IC tag and the communication antenna can communicate with each other.

  In another tire wear state detection system according to the present invention, the road on which the communication antenna is disposed is a road passing through an ETC gate, and the warning is displayed on a display device of the ETC gate.

  In still another tire wear state detection system according to the present invention, the vehicle further includes a communication unit that communicates with a display device and the ETC gate, and the warning is displayed on the display device of the vehicle.

In the tire wear state detection device of the present invention, the tread wear state is determined based on a communication antenna capable of communicating with an IC tag embedded in a tread of a vehicle tire, and a communication state between the IC tag and the communication antenna. and determining the wear state determination unit, possess a warning output section to which the wear state determination unit outputs a warning in response to the state of wear of the tread where it is determined, wherein the IC tag, the radio wave blocking member embedded in the tread it is embedded in the hidden position, the wear state determination unit, the tread is determined to have worn when said IC tag and the communication antenna can communicate.

  In another tire wear state detection device of the present invention, the communication antenna is further disposed on the surface of the road passing through the ETC gate or in the ground near the surface, and the warning is displayed on the display device of the ETC gate. Is done.

  In still another tire wear state detection device of the present invention, the vehicle further includes a communication unit that communicates with a display device and the ETC gate, and the warning is displayed on the display device of the vehicle.

  In still another tire wear state detection device of the present invention, the communication antenna is further disposed in a peripheral portion of a tire in a vehicle body of the vehicle, the vehicle includes a display device, and the warning is transmitted to the vehicle. It is displayed on the display device.

In the tire wear state detection method of the present invention, communication is performed with an IC tag embedded in a tread of a vehicle tire, and the wear state of the tread is detected based on the communication state with the IC tag. A tire wear state detection method for outputting a warning in response , wherein the IC tag is embedded in a position hidden by a radio wave blocking member embedded in the tread and can be communicated with the IC tag. Detects wear .

In the tire according to the present invention, the IC tag embedded in the tread at a predetermined position from the tread surface, and communication between the IC tag and an external communication antenna at a position closer to the tread surface than the IC tag are disabled. and a radio wave blocking layer embedded in the tread so, when the tread is the radio wave blocking layer is worn to disappear, the IC tag and the external communication antenna enables communication, the state of wear of the tread Detection is possible.

In another tire of the present invention, an IC tag embedded in the tread at a predetermined position from the tread surface and the periphery of each IC tag are covered so as to disable communication between the IC tag and an external communication antenna. and a radio wave cutoff member embedded in the tread so that, when the radio wave cutoff member the tread is worn to disappear, the IC tag and the external communication antenna enables communication, the state of wear of the tread Detection is possible.

  According to the present invention, the tire wear state detection system embeds an IC tag in a tread of a vehicle tire and detects the wear state of the tread based on the communication state with the IC tag. As a result, the wear state of the tire tread can be accurately grasped, a warning about the wear state of the tire tread can be notified to the vehicle driver, and the cost is reduced and the reliability is improved. be able to.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic sectional view showing the structure of a tire according to the first embodiment of the present invention, FIG. 2 is a conceptual diagram showing the layer structure of the tire according to the first embodiment of the present invention, and FIG. It is a conceptual diagram which shows the positional relationship of the layer structure of the tire and communication apparatus in 1st Embodiment. In FIG. 1, (a) shows a state where the tread is not worn, and (b) shows a state where the tread is worn.

  In the figure, reference numeral 11 denotes an IC tag of the tire wear state detection system according to the present embodiment, which is embedded in a tread 23 of a tire 21 of a vehicle traveling on a road such as a passenger car, a bus, or a truck. The IC tag 11 is the same as a normal IC tag attached to an article such as a product or a product in a factory, a warehouse, a store, or the like, and is also referred to as an RFID (Radio Frequency Identification). Is a micro wireless chip. Note that normal IC tags include an active type in which a battery is mounted and a passive type that operates only when power is supplied from the outside. The IC tag 11 may be an active type, but will be described here as a passive type.

  A plurality of grooves 22 are formed on the tread surface 24 of the tire 21 so as to be recessed from the tread surface 24. The IC tag 11 is a portion that does not correspond to the groove 22, and is embedded at a position deeper than the bottom 22 a of the groove 22, that is, a position away from the tread surface 24. Since the positions of all the IC tags 11 from the tread surface 24 in the unused new tire 21 are the same, the portion where the IC tag 11 is embedded is predetermined from the center of the tire 21 as shown in FIG. The IC tag layer 13 is formed so as to draw a circular arc with a radius.

The radio wave blocking layer 12 is embedded in a position shallower than the IC tag 11 in the tread 23, that is, a position close to the tread surface 24. The radio wave blocking layer 12 is made of a sheet-like member including a material having a function of shielding electromagnetic waves such as carbon fiber, metal fiber, and metal film, and blocks radio waves between the IC tag 11 and the tread surface 24. To do. Therefore, the radio wave blocking layer 12 is formed so as to draw a concentric circle sandwiched between the IC tag layer 13 and the tread surface 24, as shown in FIG. The radio wave blocking layer 12 is a portion that does not correspond to the groove 22 and is buried at a position shallower than the bottom 22 a of the groove 22.

  The tire wear state detection system has a communication antenna 31 disposed on the surface of the road or in the ground near the surface. When the tire 21 passes over the communication antenna 31, the communication antenna 31 communicates with an antenna (not shown) included in the IC tag 11 and receives a radio wave transmitted by the IC tag 11.

However, as shown in FIGS. 1A and 3, when the tread 23 of the tire 21 is not worn, the radio wave blocking layer 12 exists between the IC tag 11 and the tread surface 24, and the IC tag Since 11 is shielded by the radio wave blocking layer 12, the communication antenna 31 and the IC tag 11 cannot communicate with each other. The arrows in FIGS. 1A and 1B indicate the radio waves transmitted by the IC tag 11.

However, as the wear of the tire 21 progresses, as shown in FIG. 1B, when a part of the tread 23 disappears due to wear and the radio wave blocking layer 12 disappears at the same time, the communication antenna 31 and Communication with the IC tag 11 is possible. Since the radio wave blocking layer 12 is buried at a position shallower than the bottom 22a of the groove 22, before the groove 22 is completely extinguished, i.e., before the tread 23 is worn excessively, Telecommunications blocking layer 12 Disappears, and the communication antenna 31 and the IC tag 11 can communicate with each other.

  A detection unit of a tire wear state detection system as a tire wear state detection device in the present embodiment is a computer system including a calculation means such as a CPU and an MPU, a storage means such as a magnetic disk and a semiconductor memory, a communication interface, and the like. In addition to the communication antenna 31, a communication control unit (not shown) that is connected to the communication antenna 31 and controls communication with the IC tag 11, information stored in the IC tag 11 by communication with the IC tag 11 That is, an IC tag information acquisition unit (not shown) that acquires IC tag information, a wear state determination unit (not shown) that determines the wear state of the tread 23 of the tire 21 based on the communication state with the IC tag 11, and the wear state determination Of outputting a warning according to the wear state of the tread 23 of the tire 21 determined by the section Comprising a non warning output unit such as is.

  The detection unit of the tire wear state detection system is disposed in a gate device of an ETC (Electronic Toll Collection) system, that is, an ETC gate, which is disposed at an entrance / exit of an expressway. In this case, the detection unit of the tire wear state detection system is connected to be communicable with a control device that controls the operation of the ETC gate, or is integrated into the control device. The communication antenna 31 is disposed on a road passing through the ETC gate, and communicates with the IC tag 11 embedded in the tire 21 of the vehicle passing through the ETC gate. The warning output unit is connected to a display device included in the ETC gate, and displays a warning message or the like on the display device.

  Next, a method for embedding the IC tag 11 in the tread 23 of the tire 21 will be described.

  FIG. 4 is a schematic diagram showing the structure of the IC tag embedding net according to the first embodiment of the present invention.

  In the figure, reference numeral 14 denotes an IC tag embedding net, which is a net member made of a rubber material that is a material of the tread 23 of the tire 21, that is, a material that melts into the tire compound. In addition, an IC tag 11 is attached in advance to at least a part of the portion corresponding to the network node. In the manufacturing process of the tire 21, the IC tag embedding net 14 is embedded in a predetermined position of the tire compound. In this case, the IC tag 11 attached to the IC tag embedding net 14 forms an IC tag layer 13 that draws an arc having a predetermined radius from the center of the tire 21, as shown in FIG. Then, the IC tag embedding net 14 is embedded.

  Thereby, the tire 21 in which the IC tag 11 is embedded in the tread 23 can be manufactured.

  Further, the IC tags 11 coated with the same material as the tire compound can be driven one by one into the tread 23 of the manufactured tire 21.

  Further, for example, the IC tag 11 can be embedded in the tread 23 of the tire 21 by a method as described in JP-A-2005-96423.

  Next, the operation of the tire wear state detection system configured as described above will be described.

  FIG. 5 is a diagram showing the operation of the tire wear state detection system according to the first embodiment of the present invention. In the figure, (a) shows a state where the tread is not worn, and (b) shows a state where the tread is worn.

First, as shown in FIG. 5A, in the state where the tread 23 of the tire 21 is not worn, the tire wear state detection system operates even if the vehicle passes through the ETC gate at the entrance / exit of the expressway. do not do. This is because the IC tag 11 embedded in the tire 21 is in a state in which the radio wave blocking layer 12 embedded in a position close to the tread surface 24 is shielded, so that it is disposed on the road at the location of the ETC gate. This is because communication with the communication antenna 31 is not possible.

However, when the wear of the tire 21 progresses, a part of the tread 23 disappears due to the wear, and the radio wave blocking layer 12 disappears at the same time, as shown in FIG. The detection unit of the tire wear state detection system detects the IC tag 11 embedded in the tire 21 when passing through the ETC gate at the doorway or the like. This is because the IC tag 11 embedded in the tire 21 can communicate with the communication antenna 31 due to the disappearance of the radio wave blocking layer 12.

  In this case, the detection unit of the tire wear state detection system determines the wear state of the tire 21 based on the IC tag information acquired by communicating with the IC tag 11, and outputs a warning to display the ETC gate. For example, a warning message such as “tire wear” is displayed. Thereby, the driver | operator of a vehicle can recognize the abrasion state of the tire 21 reliably.

  In addition to or instead of displaying a warning message on the display device of the ETC gate, the bar-shaped gate member of the openable breaker included in the ETC gate may be maintained in the closed state. . As a result, the driver of the vehicle can recognize the worn state of the tire 21 more reliably. Further, since the vehicle can be prevented from traveling, it is possible to prevent the occurrence of dangerous conditions such as slip during traveling and tire 21 burst due to wear of the tire 21.

  In addition, a warning message or the like may be displayed on the ETC on-board device by transmitting a warning to the ETC on-board device mounted on the vehicle via a communication device provided in the ETC gate. The ETC vehicle-mounted device includes a communication unit that communicates with the ETC gate.

  Further, when the ETC vehicle-mounted device is linked to a vehicle navigation device mounted on a vehicle, a warning message or the like may be displayed on the display screen of the vehicle navigation device. A warning message or the like may be output from the audio output means of the navigation device.

  Further, in the case where the vehicle navigation device is provided with a communication means capable of acquiring road traffic information provided by VICS (R) (Vehicle Information & Communication System), VICS (R) A warning may be transmitted to the vehicle navigation device via the system. The vehicle navigation apparatus includes communication means capable of transmitting and receiving various data to and from an FM transmitter, a telephone line network, the Internet, a cellular phone line network, a wireless LAN (Local Area Network), and the like. In this case, a warning may be directly transmitted to the vehicle navigation device.

  Further, the warning may be mailed to the address of the vehicle owner or the like based on the information specifying the vehicle acquired by the ETC gate communicating with the ETC on-vehicle device. In addition, when the tire wear state detection system can identify the address of the vehicle owner or the like based on the IC tag information acquired by communicating with the IC tag 11, a warning is mailed to the address. It may be.

  As described above, in the present embodiment, the IC tag 11 is embedded in the tread 23 of the tire 21 of the vehicle, and when communication with the IC tag 11 becomes possible, it is determined that the tread 23 is worn, and the driver of the vehicle Therefore, the driver can accurately grasp the wear state of the tread 23 of the tire 21.

  Further, the IC tag 11 is the same as a normal IC tag attached to an article for identifying the article, and it is not necessary to include a sensor for detecting various states of the tire 21, so that it is inexpensive. The cost of the tire wear state detection system can be kept low.

  Further, the fact that the communication with the IC tag 11 is possible does not estimate the wear state of the tire 21, but just indicates the wear state of the tire 21, so the wear state of the tire 21 is high. It becomes possible to detect with accuracy.

  Further, the IC tag 11 only transmits IC tag information, and software such as an application is not incorporated, and software such as an application is incorporated in the detection unit of the tire wear state detection system. High nature.

  If necessary, the IC tag 11 can be provided with a sensor function such as temperature detection. In this case, the road surface temperature and the like of the road can be accurately detected.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol. The description of the same operation and the same effect as those of the first embodiment is also omitted.

  FIG. 6 is a schematic cross-sectional view showing the structure of the tire in the second embodiment of the present invention. In the figure, (a) shows a state where the tread is not worn, and (b) shows a state where the tread is worn.

As shown in the figure, each IC tag 11 in the present embodiment is embedded in a tread 23 of a tire 21 in a state where the periphery is covered in advance by a radio wave blocking member 15 as a radio wave blocking layer. The radio wave blocking member 15 is made of a sheet-like member containing a material having a function of shielding electromagnetic waves, such as carbon fiber, metal fiber, and metal film, as with the radio wave blocking layer 12 in the first embodiment. Become.

  As in the first embodiment, the IC tag 11 is a portion that does not correspond to the groove 22 and is embedded at a position deeper than the bottom 22a of the groove 22, that is, a position away from the tread surface 24. It is. In the unused new tire 21, the positions of all the IC tags 11 from the tread surface 24 are the same. Therefore, the portion where the IC tag 11 is embedded is an IC that draws an arc with a predetermined radius from the center of the tire 21. A tag layer 13 is formed.

In the present embodiment, the radio wave blocking layer 12 in the first embodiment is omitted. That is, the radio wave blocking layer 12 is not embedded in the tread 23. The radio wave blocking member 15 exhibits the same function as the radio wave blocking layer 12.

That is, as shown in FIG. 6A, when the tread 23 of the tire 21 is not worn, the radio wave blocking member 15 exists around the IC tag 11, and the IC tag 11 is moved by the radio wave blocking member 15. Since it is in a shielded state, the communication antenna 31 and the IC tag 11 cannot communicate. The arrows in FIGS. 6A and 6B indicate the radio waves transmitted by the IC tag 11. However, when the wear of the tire 21 proceeds and a part of the tread 23 disappears due to wear and the radio wave blocking member 15 disappears together with the tread 23 as shown in FIG. Communication with the IC tag 11 is possible.

  Note that the configuration and operation of other points are the same as those in the first embodiment, and a description thereof will be omitted.

As described above, in the present embodiment, each IC tag 11 is embedded in the tread 23 of the tire 21 in a state where the periphery is covered by the radio wave blocking member 15. Therefore, there is no need to embed the radio wave blocking layer 12 in the tread 23 of the tire 21, the structure of the tire 21 can be simplified, and the cost of the tire wear state detection system can be kept low.

  Next, a third embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st and 2nd embodiment, the description is abbreviate | omitted by providing the same code | symbol. Also, the description of the same operations and effects as those of the first and second embodiments is omitted.

  FIG. 7 is a schematic cross-sectional view showing the structure of the tire in the third embodiment of the present invention. In the figure, (a) shows a state where the tread is not worn, and (b) shows a state where the tread is worn.

As shown in the figure, in the present embodiment, the radio wave blocking layer 12 in the first embodiment is omitted. Further, the radio wave blocking member 15 in the second embodiment is also omitted. That is, the radio wave blocking layer 12 is not embedded in the tread 23, and each IC tag 11 is not covered with the radio wave blocking member 15.

  Then, as shown in FIG. 7A, the IC tag 11 is a portion that does not correspond to the groove 22 and is embedded at a position shallower than the bottom 22a of the groove 22, that is, a position close to the tread surface 24. Yes. In the unused new tire 21, the positions of all the IC tags 11 from the tread surface 24 are the same. Therefore, the portion where the IC tag 11 is embedded is an IC that draws an arc with a predetermined radius from the center of the tire 21. A tag layer 13 is formed.

In the present embodiment, as described above, the radio wave blocking layer 12 is not embedded in the tread 23, and each IC tag 11 is not covered with the radio wave blocking member 15, so that FIG. As shown in (a), the communication antenna 31 and the IC tag 11 can communicate with each other in a state where the tread 23 of the tire 21 is not worn. An arrow in FIG. 7A indicates a radio wave transmitted by the IC tag 11.

  However, when the wear of the tire 21 proceeds and a part of the tread 23 disappears due to wear and the IC tag 11 disappears with the wear as shown in FIG. Communication with the tag 11 cannot be performed. Since the IC tag 11 is buried at a position shallower than the bottom 22a of the groove 22, the IC tag 11 disappears before the groove 22 completely disappears, that is, before the tread 23 is excessively worn. The communication antenna 31 cannot communicate with the IC tag 11.

  Then, the detection unit of the tire wear state detection system determines the wear state of the tire 21 by not being able to communicate with the IC tag 11, outputs a warning, and displays, for example, on the display device of the ETC gate, A warning message such as “tire wear” is displayed. In addition to or instead of displaying a warning message on the display device of the ETC gate, the openable / closable bar-shaped gate member of the ETC gate may be maintained in the closed state.

  In addition, a warning message or the like may be displayed on the ETC on-board device by transmitting a warning to the ETC on-board device mounted on the vehicle via a communication device provided in the ETC gate.

  Further, when the ETC vehicle-mounted device is interlocked with a vehicle navigation device mounted on the vehicle, a warning message or the like may be displayed on the display screen of the vehicle navigation device. A warning message or the like may be output as audio from the audio output means of the navigation apparatus for use.

  Further, when the vehicle navigation device includes a communication means capable of acquiring road traffic information provided by VICS (R), the vehicle navigation device is connected to the vehicle navigation device via the VICS (R) system. A warning may be sent. In the case where the vehicle navigation device includes communication means capable of transmitting and receiving various data to and from an FM transmitter, a telephone line network, the Internet, a mobile phone line network, a wireless LAN, and the like. The warning may be directly transmitted to the vehicle navigation device.

  Further, the warning may be mailed to the address of the vehicle owner or the like based on the information specifying the vehicle acquired by the ETC gate communicating with the ETC on-vehicle device.

  Since the configuration and operation of other points are the same as those in the first and second embodiments, description thereof will be omitted.

  As described above, in the present embodiment, the IC tag 11 is embedded in the tread 23 of the tire 21 of the vehicle, and when communication with the IC tag 11 becomes impossible, it is determined that the tread 23 is worn, and the vehicle is driven. Since the warning is output to the driver, the driver can accurately grasp the wear state of the tread 23 of the tire 21.

In this case, since it is not necessary to embed the radio wave blocking layer 12 in the tread 23 of the tire 21 and it is not necessary to cover the periphery of each IC tag 11 with the radio wave blocking member 15, the structure of the tire 21 can be simplified. This can reduce the cost of the tire wear state detection system.

  Next, a fourth embodiment of the present invention will be described. In addition, about the thing which has the same structure as the 1st-3rd embodiment, the description is abbreviate | omitted by providing the same code | symbol. Explanation of the same operations and effects as those of the first to third embodiments is also omitted.

  In the present embodiment, the detection unit of the tire wear state detection system is arranged in the vehicle instead of the ETC gate. The communication antenna 31 is disposed not on the road but on the periphery of the tire 21 in the vehicle body, for example, mudguard covering the periphery of the tire 21, that is, inside the fender. The detection unit of the tire wear state detection system is connected to or integrated with a vehicle navigation device, a vehicle control computer system, a warning light control device, etc. mounted on the vehicle. . Further, the warning output unit of the tire wear state detection system is connected to a display device, a warning light, etc. of the vehicle navigation device, and displays a warning message or the like on the display device, or turns on the warning light. ing.

When the IC tag 11 and the radio wave blocking layer 12 are embedded in the tread 23 of the tire 21 as in the first embodiment, the wear of the tire 21 proceeds and a part of the tread 23 is When it disappears due to wear and the radio wave blocking layer 12 disappears, the detection unit of the tire wear state detection system detects the IC tag 11 embedded in the tire 21. In this case, the detection unit of the tire wear state detection system determines the wear state of the tire 21 based on the IC tag information acquired by communicating with the IC tag 11 and outputs a warning, for example, for a vehicle. A warning message such as “tire wear” is displayed on the display device of the navigation device, or a warning light is turned on. Thereby, the driver | operator of a vehicle can recognize the abrasion state of the tire 21 reliably.

In addition, when each IC tag 11 is embedded in the tread 23 of the tire 21 in a state where the periphery is covered by the radio wave blocking member 15 as in the second embodiment, wear of the tire 21 proceeds. When a part of the tread 23 disappears due to wear and the radio wave blocking member 15 disappears at the same time, the detection unit of the tire wear state detection system detects the IC tag 11 embedded in the tire 21.

Further, unlike the third embodiment, the radio wave blocking layer 12 is not embedded in the tread 23 of the tire 21, and each IC tag 11 is not covered with the radio wave blocking member 15. When the IC tag 11 is embedded at a position shallower than the bottom portion 22a of the groove 22, the tire 21 is worn and a part of the tread 23 disappears due to the wear, and the IC tag 11 disappears together with it. Then, the detection unit of the tire wear state detection system determines the wear state of the tire 21 because it cannot communicate with the IC tag 11, and outputs a warning.

  Since the configuration and operation of other points are the same as those in the first to third embodiments, description thereof will be omitted.

  Thus, in the present embodiment, the detection unit of the tire wear state detection system is disposed in the vehicle. Thereby, even if the vehicle does not pass through the ETC gate, it is possible to determine the wear state of the tire 21 and output a warning. That is, it is possible to determine the wear state of the tire 21 and output a warning regardless of where the vehicle is traveling. Therefore, since the wear state of the tire 21 is determined at an appropriate timing and a warning is output, the driver can grasp the wear state of the tread 23 of the tire 21 more accurately.

  In the first embodiment, only the example in which the detection unit of the tire wear state detection system is disposed at the ETC gate at the entrance / exit of the expressway has been described. However, the detection unit of the tire wear state detection system is For example, it can be arranged at the entrance / exit of a gas station, the entrance / exit of an automobile supply store, the entrance / exit of an automobile sales store, the service area of a highway or the entrance / exit of a parking area. In this case, the advertisement can be displayed on the display device together with the warning message. Further, when the vehicle can be identified based on the IC tag information acquired by the tire wear state detection system communicating with the IC tag 11, an advertisement for a product or service corresponding to the identified vehicle is displayed. It can also be displayed.

  In the first embodiment, only an example in which the IC tag layer 13 is single has been described. However, the IC tag 11 is embedded in the tread 23 of the tire 21 so that there are a plurality of IC tag layers 13. You can also. In this case, the wear state of the tread 23 can be determined for each IC tag layer 13. Further, the wear state of the tread 23 in the width direction of the tire 21 can be determined based on the position of the IC tag 11 in the width direction of the tire 21.

  Further, the type, size, date of manufacture, etc. of the tire 21 can be determined based on the acquired IC tag information. For example, the appropriate air pressure of the tire 21 can be determined based on the type and size. Further, for example, deterioration of the tire 21 due to secular change can be determined based on the date of manufacture.

  Furthermore, based on the acquired IC tag information, the length, width, inter-axis distance, etc. of the vehicle can be determined.

  Further, the IC tag 11 can be embedded in a rubber chain attached to the tire 21 when the vehicle travels on a snowy road. As a result, a warning about the rubber chain not being attached can be displayed during snowfall. Furthermore, it is possible to determine whether or not to guide the vehicle to the inspection lane in the chain regulation during snowfall. Similarly, when it is possible to identify that the tire 21 is a studless tire based on the acquired IC tag information, a warning about not wearing the studless tire is displayed, or the vehicle is guided to the inspection lane in chain regulation. Or not.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

1 is a schematic cross-sectional view showing the structure of a tire in a first embodiment of the present invention. It is a conceptual diagram which shows the layer structure of the tire in the 1st Embodiment of this invention. It is a conceptual diagram which shows the positional relationship of the tire layer structure and communication apparatus in the 1st Embodiment of this invention. It is the schematic which shows the structure of the net | network for IC tag embedding in the 1st Embodiment of this invention. It is a figure which shows operation | movement of the tire wear condition detection system in the 1st Embodiment of this invention. It is a schematic cross section which shows the structure of the tire in the 2nd Embodiment of this invention. It is a schematic cross section which shows the structure of the tire in the 3rd Embodiment of this invention.

Explanation of symbols

11 IC tag 12 radio wave blocking layer 15 radio wave blocking member 21 tire 23 tread 24 tread surface 31 communication antenna

Claims (10)

(A) an IC tag embedded in a tread of a vehicle tire;
(B) a communication antenna disposed on the road surface or in the ground near the surface;
(C) said detecting the state of wear of the tread based on the communication state of the IC tag and the communication antenna, have a detection unit that outputs a warning in response to the wear state,
(D) The IC tag is embedded in a position hidden by a radio wave blocking member embedded in the tread,
(E) The tire wear state detection system , wherein the detection unit detects that the tread is worn when the IC tag and the communication antenna can communicate with each other. The road on which the communication antenna is disposed is a road that passes through an ETC gate,
The tire wear state detection system according to claim 1, wherein the warning is displayed on a display device of the ETC gate. The vehicle includes a communication unit that communicates with a display device and the ETC gate,
The tire wear state detection system according to claim 2, wherein the warning is displayed on a display device of the vehicle. (A) a communication antenna capable of communicating with an IC tag embedded in a tread of a vehicle tire;
(B) a wear state determination unit that determines a wear state of the tread based on a communication state between the IC tag and the communication antenna;
(C) possess a warning output section to which the wear state determination unit outputs a warning in response to the state of wear of the tread where it is determined,
(D) The IC tag is embedded in a position hidden by a radio wave blocking member embedded in the tread,
(E) The tire wear state detection device, wherein the wear state determination unit determines that the tread is worn when the IC tag and the communication antenna can communicate with each other. The communication antenna is disposed in or near the surface of a road passing through an ETC gate,
The tire wear state detection device according to claim 4, wherein the warning is displayed on a display device of the ETC gate. The vehicle includes a communication unit that communicates with a display device and the ETC gate,
The tire wear state detection device according to claim 5, wherein the warning is displayed on a display device of the vehicle. The communication antenna is disposed in a peripheral portion of a tire in the vehicle body,
The vehicle includes a display device,
The tire wear state detection device according to claim 4, wherein the warning is displayed on a display device of the vehicle. (A) Communicate with an IC tag embedded in the tread of a vehicle tire,
(B) detecting a wear state of the tread based on a communication state with the IC tag;
(C) A tire wear state detection method for outputting a warning according to the wear state,
(D) The IC tag is embedded in a position hidden by a radio wave blocking member embedded in the tread,
(E) A tire wear state detection method that detects that the tread is worn when communication with the IC tag is possible . (A) an IC tag embedded in the tread at a predetermined position from the tread surface;
(B) a radio wave blocking layer embedded in the tread so as to disable communication between the IC tag and an external communication antenna at a position closer to the tread surface than the IC tag;
(C) When the tread is worn and the radio wave blocking layer disappears, the IC tag and an external communication antenna can communicate with each other, and the wear state of the tread can be detected. (A) an IC tag embedded in the tread at a predetermined position from the tread surface;
(B) a radio wave blocking member embedded in the tread so as to cover the periphery of each IC tag so as to disable communication between the IC tag and an external communication antenna ;
(C) When the tread is worn and the radio wave blocking member disappears, the IC tag and an external communication antenna can communicate with each other, and the wear state of the tread can be detected.

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