JP2003335116A - Tire with information acquiring function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire with an information acquiring function capable of acquiring the information on the inside of the tire, and an information acquiring system for acquiring the information on the inside of the tire. <P>SOLUTION: This tire with information acquiring function comprises an information acquiring device 800. The information acquiring device 800 has an IC chip 8 and an antenna 9. The IC chip 8 has a detecting element 806 for detecting the information on the inside of the tire, and further comprises an antenna coil 84 for outputting the detected information by a radio signal. The antenna 9 has an internal antenna coil 9a for inputting the radio signal from the antenna coil 84, and an external antenna coil 9c for outputting a signal corresponding to the radio signal to the external. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire with an information acquisition function capable of acquiring information on the inside of a tire and an information acquisition system for acquiring information on the inside of the tire.

[0002]

2. Description of the Related Art There is known a conventional technique of embedding a transponder in a tire in order to obtain temperature and internal pressure information regarding the tire. For example, this conventional technique is disclosed in Japanese Patent Laid-Open No. 9-13.
It is disclosed in Japanese Patent No. 6517. In this publication, an adhesive is applied to the inner peripheral surface of the tire to bond the adhesive portion, and the transponder body is provided on the adhesive portion. A receiving antenna and a transmitting antenna are provided in this transponder body. The receiving antenna and the transmitting antenna are wired to internal circuits such as a rectifier circuit and a transmitter. Further, the transponder is supplied with power from a scanner outside the tire. Also, communication is performed between the transponder and the scanner.

[0003]

As described above, in the conventional transponder provided on the tire, since the transmitting antenna and the receiving antenna are provided on the inner peripheral surface of the tire, there is a loss in power supply from the scanner. Many occur,
Communication may not be performed properly between the scanner and transponder. In particular, when a metal carcass cord is incorporated in the tire, power supply and communication are disturbed, and such a problem is likely to occur.

Further, since the transmitting antenna and the receiving antenna are directly wired to the internal circuit of the transponder, disconnection is likely to occur under severe vibration conditions, and power supply and communication can be cut off afterwards. There was also the problem that it was highly reliable.

The present invention has been made to solve such a problem, and provides a tire with an information acquisition function capable of accurately acquiring information on the inside of the tire and an information acquisition system for acquiring the information on the inside of the tire. This is the first purpose.

A second object is to provide a highly reliable tire with an information acquisition function and an information acquisition system for acquiring information inside the tire.

[0007]

A tire with an information acquisition function according to the present invention is a tire provided with an information acquisition device having an information acquisition section and an antenna section, wherein the information acquisition section comprises:
It has a detection means for detecting the information inside the tire and a radio signal output means for outputting the information detected by the detection means by a radio signal, and the antenna section has a radio signal output by the radio signal output means. And a second antenna for outputting a signal corresponding to the radio signal to the outside. In such a configuration, since the information acquisition unit and the antenna unit are separated and both of them communicate by wireless communication, there is no effect of disconnection that occurs when both are wired. Play.

Here, the detection means may be provided on the inner peripheral surface of the tire. With such a configuration, the information in the tire can be accurately detected.

Further, the first antenna is provided on the inner peripheral surface of the tire, and the second antenna is connected to the first antenna through a connecting portion and is provided outside the car cascode. Is preferred. With such a configuration, it is possible to prevent the carcass cord from interfering with communication with the outside.

In particular, the detecting means may be provided on the surface of the tire facing the ground contact surface. With this configuration,
Since the detecting means is urged on the surface by the centrifugal force, the degree of adhesion between the two is improved. Further, the detection means may be provided on a surface substantially vertical to the ground contact surface of the tire. With such a configuration, since the detection means can be provided in the area having no belt, the strength of the tire can be maintained, and when the belt is metal, there is no effect.

Further, a magnetic material may be provided on the same surface as or inside the second antenna. Thereby, the communication state between the second antenna and the outside can be improved.

Further, it is preferable that the information acquisition section includes a detection means for acquiring a plurality of different information. With such a configuration, a plurality of pieces of information can be acquired.

Further, it is desirable that the number of turns of the second antenna is larger than the number of turns of the first antenna. With such a configuration, the communication distance with the outside can be lengthened.

The information acquisition unit in the preferred embodiment is composed of an IC with a built-in antenna coil.

In particular, it is desirable that the information acquisition section is composed of a spherical semiconductor.

[0016] Further, it is preferable that the tire includes a tube, the information acquisition unit is installed on the inner peripheral surface of the tube, and the first antenna is installed on the inner peripheral surface of the tire.

An information acquisition system according to the present invention is an information acquisition system that includes a tire including an information acquisition device having an information acquisition unit and an antenna unit, and a reader device that acquires information from the information acquisition device. The information acquisition unit includes a detection unit that detects information inside the tire and a wireless signal output unit that outputs the information detected by the detection unit as a wireless signal, and the antenna unit outputs the wireless signal. And a second antenna for outputting a signal corresponding to the wireless signal to the reader device, wherein the reader device has the second antenna. It is provided with means for receiving the signal transmitted from the antenna. In such a configuration,
Since the information acquisition unit and the antenna unit are separated and both of them communicate with each other by wireless communication, there is an effect that the problem of disconnection that occurs when both are connected by wiring does not occur.

It is desirable to provide a plurality of reader devices. With such a configuration, the power supply to the information acquisition device becomes reliable, and the communication state between the information acquisition device and the reader device can be improved.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 of the Invention FIG. 1 shows the system configuration of the information acquisition system according to the first embodiment of the present invention. This information acquisition system is usually implemented in a four-wheeled vehicle. However, the information acquisition system can be realized not only for four-wheeled vehicles but also for single-wheeled vehicles and three-wheeled vehicles. In the embodiment of the present invention, a vehicle with a gasoline engine that travels on a road is assumed, but the invention is not limited to this, and may be an electric engine or a hybrid engine, and a monorail that travels on a rail, It is applicable to trains and even planes.

The tire 100 includes an information acquisition device 800. The information acquisition device 800 can communicate with the reader device 300 via the transmission / reception antenna 200. The reader device 300 is provided near the tire 100 of the vehicle body. The reader device 300 is connected to the vehicle body side control device 400 in a wired or wireless communicable state.
The vehicle body side control device 400 is further connected to the output device 500.

The tire 100 is a pneumatic tire. In Embodiment 1 of the present invention, an example of a tubeless tire will be described, but a tubed tire may be used. The specific structure of the tire 100 will be described later.

The information acquisition device 800 is a device for measuring information such as the pressure, temperature and gas type in the tire 100. The information acquisition device 800 wirelessly transmits the acquired measurement information to the reader device 300. The information acquisition device 800 is supplied with power from the reader device 300. The specific configuration of the information acquisition device 800 will be described in detail later.

The reader device 300 is an information acquisition device 800.
The vehicle side control device 40 receives information such as pressure acquired by
Output to 0. The reader device 300 includes, for example, a transmitter including a transmitter, a receiver including a receiver and an A / D conversion circuit, a controller including a CPU and a memory, a power supply unit, and the like. The reader device 300 can transmit an unmodulated wave for supplying power to the information acquisition device 800, or can transmit an information acquisition command signal instructing acquisition of information.

The vehicle body side control device 400 includes the reader device 30.
The information output from 0 is input, and predetermined processing is performed based on this information. For example, when the information is the pressure information of the tire 100, it is compared whether or not the tire pressure is equal to or lower than a predetermined value, and when the tire pressure is equal to or lower than the predetermined value, the output device 500 outputs a warning.

The output device 500 is a display or speaker provided in front of the driver's seat of the automobile, and outputs a warning and measurement information.

FIG. 2 is a half sectional view of a tire with an information acquisition function according to the present invention. The tire 100 includes a cap tread 1, a belt 2, a side tread 3, a carcass cord 4, a beat wire 5, a finishing 6, a bead portion 7,
The IC chip 8 and the antenna 9 are provided.

Here, the carcass cord 4 is a cord layer made of fiber or steel coated with rubber, and the cords are laminated obliquely or radially to form a skeleton of the tire.

The IC chip 8 and the antenna 9 constitute an information acquisition device 800. The IC chip 8 is an IC chip having a built-in wireless communication coil, and more preferably a ball-shaped spherical semiconductor is used. That is, I
The C chip 8 does not necessarily have to be a planar IC chip, and may be an IC (integrated circuit). In the explanation below,
An IC chip will be described as an example. The IC chip 8 has detection elements such as a pressure sensor, a temperature sensor, and a gas sensor built therein, and can detect pressure, temperature, gas, and the like inside the tire. IC chip 8 is tire 100
Is adhered to the inner peripheral surface of the with an adhesive or the like. In particular, since the IC chip 8 is provided on the inner peripheral surface of the tire 100 that faces the ground contact surface, when the tire 100 rotates, I
A centrifugal force is generated in the C tip 8 perpendicularly to the inner peripheral surface. That is,
When the tire 100 rotates, the IC chip 8 is urged in a direction in which it is pressed against the inner peripheral surface. Therefore, the IC chip 8 and the tire 100 have a high degree of adhesion, and the IC chip 8 has a highly reliable structure in that the IC chip 8 and the tire 100 are hard to separate from each other.

The antenna 9 is an antenna for communicating with the reader device 300 and receiving power from the reader device 300. In this example, the antenna 9 has an internal antenna coil 9a, an external antenna coil 9c, and a connecting portion 9b. The internal antenna coil 9a communicates with the IC chip 8. The internal antenna coil 9a is provided on the inner peripheral surface of the tire. In FIG. 2, the internal antenna coil 9a is described as being exposed inside the tire, but the structure is not limited to this, and it may be covered with rubber or the like. The external antenna coil 9c performs communication and the like with the reader device 300. The external antenna coil 9c is provided outside the belt 2 and the carcass cord 4. The connection portion 9b is a wiring that electrically connects the internal antenna coil 9a and the external antenna coil 9c. The connecting portion 9b penetrates the belt 2 and the carcass cord 4.

FIG. 3 shows the construction of the IC chip 8 and the antenna 9 in detail. As shown in the figure, the internal antenna coil 9 a is formed in a toggle shape so as to surround the IC chip 8. The internal antenna coil 9a according to the preferred embodiment has one turn or two turns.
The external antenna coil 9c is formed in a toggle shape. External antenna coil 9c according to a preferred embodiment
Is 10 to 20 turns. The internal antenna coil 9a and the external antenna coil 9 have a function as a so-called transformer. Although the antenna coil is also provided in the IC chip 8, the communication distance can be lengthened by interposing such an antenna 9.
In addition, in this example, the antenna coils 9a and 9c are configured in a planar shape, but the invention is not limited to this, and may be configured in a cylindrical shape.

FIG. 4 shows a configuration example of the IC chip 8. IC
The chip 8 includes a chip body 81 and a cover 82. The chip body 81 includes an internal circuit 83 and an antenna coil 84.

FIG. 5 shows a block diagram of the chip body 81 of the IC chip 8. The chip body 81 is the antenna coil 8
In addition to 4, the central control unit (CP
U) 801, a modulation circuit 802, a demodulation circuit 803, a power supply circuit 804, a radio frequency circuit 805, and a detection element 806.

The antenna coil 84 is used in the radio frequency circuit 8
05 and the power supply circuit 804. The antenna coil 84 is generated by patterning the IC chip 8 with aluminum wiring or the like. Antenna coil 84
Is an antenna coil for communicating with the reader device 300 via the antenna 9. Further, the antenna coil 84 is connected to the reader device 300 via the antenna 9.
It is also used to receive more unmodulated waves (radio waves, electromagnetic waves). The antenna coil 84 is, for example, 13.56 MHz
A radio signal having a frequency of is input / output. The frequency of the radio signal input / output from the antenna coil 84 is not limited to this, but may be in the long medium wave band of about 100 to 200 kHz or 2.45.
It may be a microwave band of GHz or the like. Internal circuit 8
In 3, the antenna coil 84 is connected in parallel with a capacitor to form a resonance circuit, and the resonance frequency thereof is matched with the frequency of the radio wave transmitted from the reader device 300, whereby the reception efficiency can be improved.

The central control unit (CPU) 801 has a function of controlling the inside of the IC chip 81. A logic circuit having a control function may be used instead of the CPU 801. The modulation circuit 802 is a circuit that mainly performs a modulation process on the information detected by the detection element 806. Demodulation circuit 80
Reference numeral 3 is a circuit that demodulates a detection instruction signal mainly transmitted from the reader device 300.

The power supply circuit 804 transmits the radio wave supplied from the reader device 300 to the antenna 9 and the antenna coil 84.
Is a circuit that receives power via the CPU 801 and supplies power to the CPU 801 and other circuits. The power supply circuit 804 rectifies and stabilizes this radio wave and supplies it to the CPU 801 and the like to activate the IC chip 801. Note that the power supply circuit 804 includes a capacitor and charges electric power.

The radio frequency circuit 805 is a modulation circuit 802.
The signal modulated by is subjected to amplification processing and the like.

The detection element 806 detects pressure, temperature, gas type, etc., converts it into an electric signal, and outputs it to the CPU 801.

Next, an example of information acquisition processing by the information acquisition system according to the first embodiment of the present invention will be described.

First, the vehicle body side control device 400 instructs the reader device 300 to obtain information on the tire 100. In response to this information acquisition command, the reader device 300
An unmodulated wave for supplying power to the information income device 800 is transmitted. The information acquisition device 800 receives this unmodulated wave. This unmodulated wave is generated by the external antenna coil 9c,
After passing through the connecting portion 9b and the internal antenna coil 9a,
It is received by the antenna coil 84 of the C chip 8. The power supply circuit 84 rectifies and stabilizes the electric power induced by the unmodulated wave received by the antenna coil 84, and stabilizes the electric power.
1 to activate the IC chip body 81. The activated IC chip 8 generates a confirmation signal (Ack signal) in the CPU 801, and is transmitted to the reader device 300 via the modulation circuit 802, the radio frequency circuit 805, the antenna coil 84, and the antenna 9. Reader device 30
When 0 receives the confirmation signal via the transmission / reception antenna 200, 0 transmits an information acquisition command signal to the information acquisition device 800. This information acquisition command signal is sent to the reader device 30.
Information acquisition device 80 from 0 via transmission / reception antenna 200
Sent to 0. Further, the information acquisition command signal is modulated and transmitted by a radio wave of a specific frequency. For this modulation, for example, amplitude modulation (ASK), frequency modulation (FSK)
SK), phase modulation (PSK), or the like is used.

In the information acquisition device 800, the information acquisition command signal is received by the antenna coil 84 of the IC chip 8 via the external antenna coil 9c, the connecting portion 9b and the internal antenna coil 9a. Also, the antenna coil 8
The information acquisition command signal received by No. 4 is digitized by the demodulation circuit 803 via the radio frequency circuit 805. The CPU 801 reads the digitized information acquisition command signal and acquires the measurement information from the detection element 806. For example, pressure information is acquired as measurement information.

The measurement information obtained by the detection element 806 is modulated by the modulation circuit 802 and amplified by the radio frequency circuit 805, and the antenna coil 8
4 is transmitted. The radio signal relating to the measurement information received by the internal antenna coil 9a is transmitted to the external antenna coil 9c via the connection portion 9b. The radio signal related to this measurement information is transmitted from the external antenna coil 9c and received by the transmission / reception antenna 200 of the reader device 300. The reader device 300 receives the wireless signal, performs demodulation processing, and the like, and extracts measurement information. The reader device 300 uses the extracted measurement information as the vehicle body side control device 400.
Output to. The vehicle-body-side control device 400 receives this measurement information and compares it with a predetermined value, for example. As a result of the comparison, when it is determined that the value is equal to or more than the predetermined value, the output device 500 outputs an alarm. The information acquisition device 8 provided on the rotating tire for transmitting and receiving the unmodulated wave, the confirmation signal, the information acquisition command signal, and the measurement information as described above.
00 is continuously executed while 00 is located near the reader device 300. In the information acquisition processing flow described above,
After exchanging the confirmation signal and the information acquisition command signal, the information acquisition device 800 transmits the measurement information to the reader device 300, but the present invention is not limited to this. That is, the information acquisition device 800 may immediately transmit the measurement information without transmitting the confirmation signal when the unmodulated wave is received and the power source is secured.

As described above, in the information acquisition device according to the first embodiment of the present invention, the IC chip 8 having the detection element 806 is provided inside the tire, so that the information inside the tire is accurately measured. be able to. Also, the antenna 9
Extends from the vicinity of the IC chip 8 to the outside, so that the communication environment with the reader device 300 installed outside the tire 100 is improved. Particularly, since a part of the antenna 9 is provided outside the steel carcass cord 4,
Communication is not disturbed by the carcass code 4,
It is possible to communicate with the reader device 300. Furthermore, IC chip 8
Since the antenna 9 and the antenna 9 are separated and the antenna coil 84 in the IC chip 8 and the antenna 9 communicate with each other, there is also an effect that the problem of disconnection that occurs when both are connected does not occur. Further, it is difficult to communicate with the reader device 300 because the communication distance is short only with the antenna coil 84 in the IC chip 8, but the antenna 9 can increase the communication distance.

Second Embodiment of the Invention Embodiment 2 of the invention
FIG. 6 shows a half cross-sectional view of the tire with an information acquisition function according to the present invention. As shown in the figure, the information acquisition device 800 including the IC chip 8 and the antenna 9 is provided on the side surface of the tire 100. That is, the information acquisition device 800
Is provided on a surface substantially perpendicular to the ground contact surface of the tire 100. More specifically, the IC chip 8 that is a component of the information acquisition device 800 is a side surface of the tire 100,
Moreover, it is fixed to the inner peripheral surface with an adhesive or the like. An internal antenna coil 9a is provided so as to surround the IC chip 8 at a certain distance. The internal antenna coil 9a is the carcass cord 4
It is provided inside. The internal antenna coil 9a is connected to the external antenna coil 9c via the connecting portion 9b.
Connected with. The connecting portion 9b extends outward so as to penetrate the carcass cord 4. The external antenna coil 9c is provided outside the carcass cord 4.

The other structures are the same as those described in the first embodiment of the invention, and the description thereof will be omitted.

In the information acquisition device according to the second embodiment of the present invention, the IC chip 8 having the detection element 806 is provided inside the tire, so that the information inside the tire can be accurately measured. Further, the antenna 9 is the IC chip 8
Since it extends from the vicinity to the outside, the communication environment with the reader device 300 installed outside the tire 100 is improved. In particular, since a part of the antenna 9 is provided outside the steel carcass cord 4, the reader device 3 is not interfered with by the carcass cord 4.
Can communicate with 00. Furthermore, the IC chip 8 and the antenna 9
Is separated and the antenna coil 84 in the IC chip 8 and the antenna 9 communicate with each other, so that there is also an effect that the problem of disconnection that occurs when both are connected does not occur. Further, since the communication distance is short only with the antenna coil 84 in the IC chip 8, the reader device 300
Although it is difficult to communicate with, the antenna 9 can increase the communication distance. Particularly, in the information acquisition device according to the second embodiment of the present invention, since the internal antenna coil 9a and the external antenna coil 9c are connected without the belt 2, the strength of the tire can be maintained, and When the belt 2 is made of metal, there is an effect that there is no such influence.

Third Embodiment of the Invention Embodiment 3 of the invention
FIG. 7 shows a half cross-sectional view of the tire with the information acquisition function according to the present invention. As shown in the figure, the information acquisition device 800 including the IC chip 8 and the antenna 9 is provided inside the ground contact surface of the tire 100, and basically the first embodiment of the invention described with reference to FIG. IC chip 8 at the same position as
And an antenna 9 are provided. In the third embodiment of the present invention, the magnetic body 11 is provided between the external antenna coil 9c and the internal antenna coil 9a and outside the belt 2 and the carcass cord 4. This magnetic body 11
Has a ring shape, and a connecting portion 9b connecting the internal antenna coil 9a and the external antenna coil 9c penetrates through the central portion thereof. The other configurations are the same as the configurations described in the first embodiment of the invention, and the description thereof will be omitted.

In the information acquisition device according to the third embodiment of the present invention, in particular, the magnetic substance 11 can strengthen the magnetic flux passing through the external antenna coil 9c. Therefore, the external antenna coil 9c and the reader device 300
It is possible to improve the communication environment with.

Fourth Embodiment of the Invention Fourth Embodiment of the Invention
FIG. 8 shows a half cross-sectional view of the tire with an information acquisition function according to the present invention. As shown in the figure, the information acquisition device 800 including the IC chip 8 and the antenna 9 is provided inside the ground contact surface of the tire 100, and basically the first embodiment of the invention described with reference to FIG. IC chip 8 at the same position as
And an antenna 9 are provided. In the fourth embodiment of the present invention, the magnetic body 11 is provided at a substantially central portion of the external antenna coil 9c and on the same plane. The magnetic body 11 has a disk shape, and is located in the central portion of the external antenna coil 9c where no coil is provided. The magnetic body 11 is, for example, ferrite or an amorphous sheet, and its thickness is 1 m.
It is about m. The other configurations are the same as the configurations described in the first embodiment of the invention, and the description thereof will be omitted.

In the information acquisition device according to the fourth embodiment of the present invention, in particular, the magnetic substance 11 can strengthen the magnetic flux passing through the external antenna coil 9c. Therefore, the external antenna coil 9c and the reader device 300
It is possible to improve the communication environment with.

Fifth Embodiment of the Invention Embodiment 5 of the invention
FIG. 9 shows a half cross-sectional view of the tire with an information acquisition function according to the present invention. As shown in the figure, the IC chip 8 is embedded inside the tire. More specifically, the IC chip 8 is embedded between the carcass cord 4 and the tire inner peripheral surface. Similar to the IC chip 8, the internal antenna coil 9
a is also buried. Furthermore, on the inner surface of the tire, IC
IC chip 1 capable of acquiring information different from that of the chip 8, that is, different types of information or different ranges of information
0 is provided. The IC chip 10 is the IC chip 8
It has a different kind of detection element from. For example, IC
The detection element of the chip 8 is a temperature sensor, and the detection element of the IC chip 10 is a pressure sensor. Further, the detection element of the IC chip 8 is a temperature sensor in a low temperature range,
The combination is such that the detection element of the IC chip 10 is a high temperature temperature sensor. In this case, the IC chip 8 and the IC chip 9 do not mix the signals of the measurement information,
It is preferable to shift the measurement time or change the frequency of the signal returned to the reader device 300. The other configurations are the same as the configurations described in the first embodiment of the invention, and the description thereof will be omitted.

In the information acquisition device according to the fifth embodiment of the present invention, since a plurality of different information can be acquired by the plurality of IC chips 8 and 10, in particular, the situation inside the tire can be grasped more accurately. It will be possible.

In this example, two IC chips 8 and 1 are used.
Although the example in which 0 is provided is described, the present invention is not limited to this, and three or more IC chips may be provided.

Sixth Embodiment of the Invention Embodiment 6 of the invention
FIG. 10 shows a half cross-sectional view of the tire with an information acquisition function according to the present invention. As shown in the figure, this tire is a tire with a tube and has a tube 12. In this example, the internal antenna coil 9a is provided on the inner peripheral surface of the tire outside the tube. This internal antenna coil 9a is
It is connected to the external antenna 9c via the connecting portion 9b. On the other hand, the IC chip 8 is provided on the inner peripheral surface of the tube 12. Therefore, the IC chip 8 can more accurately acquire information such as the pressure and temperature inside the tube. The tube 12 and the tire are separated from each other,
Since the relative position changes, the internal antenna coil 9a is provided on the inner peripheral surface of the tire and wireless communication with the IC chip 8 provided inside the tube is performed, as shown in FIG. It is possible to make a call.

In this example, the internal antenna coil 9a
Is provided on the inner peripheral surface of the tire, but is not limited to this, and may be embedded in the tire.

Seventh Embodiment of the Invention Embodiment 7 of the Invention
FIG. 11 is a diagram showing a part of the information acquisition system according to the present invention. As shown in FIG. 11, three reader devices 30 are provided around the tire 100 having the information acquisition device 800.
1, 302 and 303 are installed. Transmission / reception antennas 201, 202, and 203 are provided in the reader devices 301, 302, and 303, respectively. The reader devices 301, 302, and 303 can communicate with the information acquisition device 800, and the information acquisition device 800.
It is possible to supply power to. Therefore, the communication state between the reader device and the information acquisition device can be improved. Further, the information acquisition device 800 is the reader device 301,
When the tire 100 rotates so as to approach 302 and 303 in this order, the reader device 301 transmits an unmodulated wave,
The reader device 302 may receive the confirmation signal and transmit the information acquisition command signal, and the reader device 303 may receive the measurement information. With this configuration, information can be reliably acquired even when the tire 100 rotates at high speed.

Even if three reader devices are not provided, two readers may be devices for transmitting an unmodulated wave for power supply, and only one may have an information communication function. In addition, the number of reader devices and devices for power supply may be plural, and is not limited to three. Further, instead of providing a plurality of reader devices, only a plurality of transmission / reception antennas may be arranged around the tire so as to be spaced apart from each other, and processing may be performed by a single reader device. Further, a plurality of information acquisition devices 800 may be provided for one tire.

Other Embodiments of the Invention. In the above example, the information acquisition device is composed of the antenna and the IC chip, but the IC chip does not necessarily have to be integrated into one chip, and is composed of a plurality of IC chips and external circuits. It may be one. However, also in this case, it is preferable to mold the entire circuit with a synthetic resin or the like.

In the above example, the antenna 9 has been described as an example in which the internal antenna coil 9a and the external antenna coil 9c are provided on different surfaces and are connected to each other by the connecting portion 9b, but the invention is not limited to this. The internal antenna coil 9a and the external antenna coil 9c may be provided on the same surface. In this case, it is preferably provided on the inner peripheral surface of the tire or embedded in the tire. In particular, when the carcass cord 4 is not made of steel, there is no problem even with such a configuration.

[0059]

As described above, according to the present invention, it is possible to provide a tire with an information acquiring function capable of accurately acquiring information on the inside of the tire and an information acquiring system for acquiring the information on the inside of the tire. Further, it is possible to provide a highly reliable tire with an information acquisition function and an information acquisition system for acquiring information inside the tire.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an information acquisition system according to the present invention.

FIG. 2 is a half cross-sectional view of a tire with an information acquisition function according to the present invention.

FIG. 3 is a diagram showing a configuration example of an IC chip and an antenna according to the present invention.

FIG. 4 is a diagram showing a configuration of an IC chip according to the present invention.

FIG. 5 is a block diagram showing a circuit configuration of an IC chip according to the present invention.

FIG. 6 is a half sectional view of a tire with an information acquisition function according to the present invention.

FIG. 7 is a half sectional view of a tire with an information acquisition function according to the present invention.

FIG. 8 is a half sectional view of a tire with an information acquisition function according to the present invention.

FIG. 9 is a half sectional view of a tire with an information acquisition function according to the present invention.

FIG. 10 is a half sectional view of a tire with an information acquisition function according to the present invention.

FIG. 11 is a diagram showing a part of an information acquisition system according to the present invention.

[Explanation of symbols]

100 tires 200 transmitting and receiving antenna 300 reader device 4 car cascode 8 IC chips 9 antenna

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeo Miyagawa             2-12-19 Shibuya, Shibuya-ku, Tokyo Stock market             Takeyama F term (reference) 2F073 AA36 AB02 AB12 BB01 BC02                       CC01 EE12 FF01 GG01 GG04

Claims (13)

[Claims] 1. A tire including an information acquisition device having an information acquisition unit and an antenna unit, wherein the information acquisition unit includes a detection unit for detecting information inside the tire and information detected by the detection unit. A wireless signal output unit for outputting a wireless signal, wherein the antenna unit receives a wireless signal output from the wireless signal output unit, and a signal corresponding to the wireless signal to the outside. A tire with an information acquisition function, which has a second antenna for outputting. 2. The tire with an information acquisition function according to claim 1, wherein the detecting means is provided on an inner peripheral surface of the tire. 3. The first antenna is provided on an inner peripheral surface of a tire, the second antenna is connected to the first antenna via a connecting portion, and is provided outside a carcass cord. The tire with an information acquisition function according to claim 2, wherein the tire has an information acquisition function. 4. The tire with an information acquiring function according to claim 2, wherein the detecting means is provided on a surface of the tire facing the ground contact surface. 5. The detection means is provided on a surface substantially vertical to the ground contact surface of the tire.
Tires with the information acquisition function described. 6. A magnetic material is provided on the same plane as or inside the second antenna.
Or the tire with the information acquisition function described in 5. 7. The tire with an information acquisition function according to claim 1, wherein the information acquisition unit includes a detection unit that acquires a plurality of different information. 8. The information according to claim 1, wherein the number of turns of the second antenna is larger than the number of turns of the first antenna. Tire with acquisition function. 9. The information acquisition unit is configured by an IC having an antenna coil built-in.
8. A tire with an information acquisition function according to any one of 8 to 8. 10. The tire with an information acquisition function according to claim 9, wherein the information acquisition section is made of a spherical semiconductor. 11. The tire is provided with a tube, an information acquisition unit is installed on an inner peripheral surface of the tube, and the first antenna is installed on an inner peripheral surface of the tire. Tire with information acquisition function. 12. An information acquisition system including a tire including an information acquisition device having an information acquisition unit and an antenna unit, and a reader device for acquiring information from the information acquisition device, wherein the information acquisition unit includes: It has a detection means for detecting the information inside the tire, and a radio signal output means for outputting the information detected by the detection means by a radio signal, and the antenna section is a radio signal output by the radio signal output means. And a second antenna for outputting a signal corresponding to the wireless signal to the reader device, wherein the reader device receives the signal transmitted from the second antenna. An information acquisition system having means for receiving. 13. The information acquisition system according to claim 12, wherein the reader device includes a plurality of reader devices.