JP4781644B2 - Wheel bearing device - Google Patents

Description

  The present invention relates to a wheel bearing device including an IC tag and a sensor.

  IC tags using RFID technology capable of non-contact communication are becoming smaller and widely used in logistics. In recent years, the requirement for traceability, that is, the requirement to pursue the history, application, or location of the object being considered has increased, and IC tags are attached to gears and other mechanical parts, and the ID code It has also been proposed to store and manage various types of information associated therewith (for example, Patent Document 1).

Various proposals have been made in which a rotation sensor and other various sensors are mounted on a wheel bearing device to make the wheel bearing device intelligent (for example, Patent Document 2).
JP 2002-049900 A JP 2001-021577 A

Also for wheel bearing devices, there is a strong demand for traceability, and this was advanced from conventional book management and computer management, and another one with an IC tag attached was proposed (Japanese Patent Application No. 2004-206900). However, even if an IC tag is simply attached, it can be used only for management of identification information, manufacturing information, physical distribution information, etc., and the situation where the wheel bearing device is actually used cannot be stored.
If the actual usage situation is known, it can be useful for periodic inspections, calculation of remaining life, and future improvements.

  The actual use status can be detected by providing a sensor in the wheel bearing device. However, all of the proposed examples of conventional wheel bearing devices with sensors are used for various control of automobiles by detecting the current situation, and do not have a function of storing the detection results as a history.

  An object of the present invention is to provide a wheel bearing device capable of detecting a use situation and storing it as a history.

The wheel bearing device according to the present invention includes an outer member having a double row rolling surface on an inner periphery, an inner member having a rolling surface facing the rolling surface, and the opposing rolling of both members. In a wheel bearing device having a double row rolling element interposed between faces and rotatably supporting a wheel with respect to a vehicle body, an IC tag capable of non-contact communication is attached. An IC tag with a sensor integrated with a sensor for detecting a detection target of the bearing device and having a memory, and provided with an input processing means for inputting a detection signal of the sensor through an input system different from a non-contact communication path And a sensor input processing means for processing the detection signal input from the sensor via the input processing means and recording it in a memory, and detecting the use status of the wheel bearing device by the sensor, Detected usage status with the sensor Shall be recorded as a history in the IC tag, IC tag with the sensor is mounted in one member of the outer member and the inner member, the sensor, the passage of a magnet mounted on the other member is used to detect, the sensor input processing means is characterized and recorded child in the memory the rotational speed obtained from the signal of the sensor as the history.
According to this configuration, the wheel bearing device is provided with an IC tag with a sensor, and the detection signal of the sensor is input through an input system different from the non-contact communication path. The situation can be recorded as a history on the IC tag. Therefore, the usage history of the wheel bearing device can be known, which can be used for, for example, periodic inspection, calculation of remaining life, future technical improvement, and the like.

In the present invention, the sensor is a coil, and the IC tag with the sensor is attached to one member of the outer member and the inner member, and the vicinity of the sensor by relative rotation of both members to the other member. The IC tag may use the output of the coil as a power source. The magnet may be provided at one place in the circumferential direction, or may be equally arranged at a plurality of places.
Since a coil is provided on one of the relatively rotating members and a magnet is provided on the other, an electromotive force is generated in the coil by the rotation. The electromotive force can be used for driving the IC tag, and the rotation of the wheel bearing device can be detected by the electromotive force generated every time the magnet passes.

  In the case of this configuration, the IC tag with sensor may be provided with a counting unit that counts the signal of the sensor when the magnet passes and stores it in a memory in the IC tag. As a result, the actual number of revolutions can be recorded.

The sensor-attached IC tag may be provided with means for converting the sensor signal when the magnet has passed into a rotational speed and recording it on the IC tag.
For example, the strength of the magnetic field due to the passage of the magnet at the installation position of the sensor is recorded and converted into a rotation speed. Thereby, it becomes possible to record the history of the rotation speed.

When the coil and the magnet are provided, they may be provided on the seal. For example, a seal that seals an end portion of the bearing space between the outer member and the inner member is provided, and the seal element is attached to one member of the outer member and the inner member, and the other member. The sensor-equipped IC tag is attached to one of the seal elements, and the magnet is attached to the other seal element.
In this case, the rotation of the wheel bearing device can be detected by the relative rotation of the sealing elements attached to the inner and outer members. Since the seal is located at a position exposed to the outside of the wheel bearing device, non-contact communication with the IC tag is facilitated when an IC tag is attached to the seal. In addition, mounting an IC tag or magnet on a seal that can be easily manufactured is easier than attaching to a part that is processed through complicated processes such as an inner member or an outer member. It is.

In the present invention, if the IC tag with a sensor has a power supply circuit that uses the power obtained by non-contact communication of the IC tag as driving power for the sensor, and if the operating power exceeds a predetermined value, the sensor input is taken in and Sensor input processing means for performing storage processing of the above-mentioned wheel, and power supply means for supplying electric power to the IC tag by contactless communication at all times or when a predetermined condition is satisfied is provided in the wheel bearing device or in the wheel bearing device. It may be provided in a vehicle to which is attached.
In general, a sensor requires a power source. However, if the sensor is driven using a power supply circuit of an IC tag, power can be easily supplied. In addition, if the IC tag has a predetermined operating power or more, a sensor input processing unit that takes in the input of the sensor and performs a predetermined storage process can be provided to stably record the output of the sensor. .

The wheel bearing device of the present invention is attached with an IC tag capable of non-contact communication, and the IC tag is integrated with a sensor for detecting a detection target of the wheel bearing device and has a memory. Providing an input processing means for inputting the detection signal of the sensor through an input system different from the non-contact communication path, and processing the detection signal input from the sensor via the input processing means; The sensor input processing means for recording in the memory is provided, the use status of the wheel bearing device is detected by the sensor, and the detected use status is recorded as a history in the IC tag with sensor. detect and Ru can be stored as a history. The sensor-attached IC tag is attached to one of the outer member and the inner member, and the sensor detects passage of a magnet attached to the other member. Since the means records the rotation speed obtained from the signal of the sensor in the memory as the history, the rotation speed can be recorded as the history.

  A first embodiment of the present invention will be described with reference to FIGS. This wheel bearing device 1 is an example of a third generation inner ring rotating type. In this specification, the side closer to the outer side in the vehicle width direction of the vehicle when attached to the vehicle is referred to as the outboard side, and the side closer to the center in the vehicle width direction is referred to as the inboard side. In FIG. 1, the left side is the outboard side, and the right side is the inboard side.

  The wheel bearing device includes an outer member 1 having a double row rolling surface 5 on the inner periphery, an inner member 2 having a rolling surface 6 facing the rolling surface 5, and these outer members. It has a double row rolling element 3 interposed between 1 and 2 facing rolling surfaces 5 and 6. Both ends of the bearing space between the outer member 1 and the inner member 2 are sealed by seals 7 and 8. The wheel bearing device 1 is a double-row angular contact ball bearing type, the rolling surfaces 5 and 6 are arc-shaped in cross section, and the raceway surfaces 5 and 6 are formed so that the contact angles are back to back. Has been. The rolling elements 3 are made of balls and are held by a cage 4 for each row.

The outer member 1 is a member on the fixed side, is an integral member, and is fixed to a knuckle (not shown) or the like of the suspension device. The outer member 1 has a vehicle body mounting flange 1a on the outer periphery for fixing to the knuckle.
The inner member 2 comprises a hub wheel 2A and an inner ring 2B fitted to the outer periphery of the inboard side end of the hub wheel 2A. The rolling surfaces 6 of the respective rows are formed on the hub wheel 2A and the inner ring 2B. Yes. The hub wheel 2A has a wheel mounting flange 2Aa on the outboard side of the outer member 1, and the wheel (not shown) is overlapped with the brake rotor on the flange 2Aa and a plurality of bolts in the circumferential direction. It is installed by. The inner ring 2B is fixed in the axial direction by a caulking portion 2Ab provided at the inboard side end of the hub ring 2A.

  The inboard-side seal 8 is a combination type seal composed of a first seal element 8A attached to the inner diameter surface of the outer member 1 and a second seal element 8B attached to the outer periphery of the inner member 2. . As shown in an enlarged view in FIG. 1B, the second sealing element 8B serves as a slinger, and is a metal having an L-shaped cross section comprising a cylindrical portion 8Ba and a standing plate portion 8Bb extending to the outer periphery of one end thereof. It consists of members. The first seal element 8A includes a cored bar 8Aa and an elastic member 8Ab, and the elastic member 8Ab has a plurality of lips 8Aba whose tips are in sliding contact with the second seal element 8B.

  An IC tag 9 with a sensor is attached to the second seal element 8B of the seal 8 on the inboard side, and a magnet 10 is attached to the first seal element 8A so as to face the IC tag 9 with a sensor. The magnets 10 may be provided only at one place, or may be provided equally at a plurality of places in the circumferential direction of the seal element 8A. The magnet 10 may be provided in a ring shape and have a plurality of magnetic poles arranged in the circumferential direction. In FIG. 1B, the sensor-attached IC tag 9 may be attached to the first seal element 8A, and the magnet 10 may be attached to the second seal element 8B so as to be opposed thereto. For example, the positions of the sensor-attached IC tag 9 and the magnet 10 shown in FIG.

  The sensor-attached IC tag 9 is obtained by adding a sensor 11 made of a coil as shown in FIG. 2 to an RFID tag applying RFID (Radio Frequency Identification) technology and integrating the whole with a resin mold or the like. is there. The IC tag with sensor 9 has an IC chip 12 and an antenna 13 as in the general RFID tag 9 'shown in FIG. The IC chip 12 includes a central processing unit (CPU) 14, a memory 15, a transmission / reception circuit 16, and a power supply circuit 17, and the power supply circuit 17 obtains power from the antenna 13. As the memory 15, a memory that does not require a power source is used. The RFID tag has a transmission type that uses electrostatic coupling, electromagnetic coupling, electromagnetic induction, microwave, light, and the like. The sensor-attached IC tag 9 of this embodiment also has any of the above transmission types. However, an electromagnetic induction type or a microwave type is used here. The transmission / reception circuit 16 and the antenna 13 are configured according to the transmission format.

  This sensor-attached IC tag 9 is provided with an input processing means 18 for inputting a signal to the CPU 14 through an input system different from the non-contact communication path from the antenna 13 in the basic configuration of the RFID tag. 18 is a sensor 11 connected thereto. The input processing means 18 is means for processing the voltage waveform of the sensor 11 into a pulse signal. The input processing means 18 may further include an input port function for controlling the input signal in accordance with a command from the CPU 14. The input processing means 18 may have a function as an A / D converter that converts an analog signal serving as a sensor output into digital data depending on the type of the sensor 11. The power supply circuit 17 uses the electromotive force of the sensor 11 formed of a coil as a power supply in addition to the power obtained from the antenna 13.

  The sensor-attached IC tag 9 is provided with sensor input processing means 19 that performs predetermined processing on data input from the sensor 11 via the input processing means 18 and records the data in the memory 15. The sensor input processing means 19 includes a program for causing the CPU 14 to perform a predetermined operation, and is provided in a ROM (not shown) in which a program for controlling the CPU 14 is described, another ROM, or the like.

The sensor input processing means 19 includes a counting means 19a and a rotation speed conversion means 19b.
The counting means 19a is a means for counting the signal of the sensor 11 when the magnet 10 passes and storing it in the memory 15 in the IC tag 9, and records the integrated value of the ON signal.
The rotation speed conversion means 19b is a means for converting the signal of the sensor 11 when the magnet 10 passes to the rotation speed and recording it in the memory 15 of the IC tag 9, and for example, the count value of the sensor-on signal is timed every predetermined time. Divide by to get speed data. It is preferable to record all the speed data as long as the capacity of the memory 15 is sufficient. However, processing such as extending the sampling interval or recording only when the speed exceeds the set speed is performed to reduce the memory usage. You may do it.

  According to the wheel bearing device with this configuration, the sensor-attached IC tag 9 is provided, and the detection signal of the sensor 11 is input through an input system different from the non-contact communication path. The usage status can be recorded as a history on the IC tag 9. Therefore, the usage history of the wheel bearing device can be known, which can be used for periodic inspections, elucidation of deficiencies, calculation of remaining life, and future improvements.

  In this embodiment, since the sensor 11 is a coil, an electromotive force is generated in the sensor 11 by rotation. This electromotive force can be used for driving the IC tag 9, and the rotation of the wheel bearing device can be detected by the electromotive force generated every time the magnet 11 passes. The signal of the sensor 11 when the magnet 11 passes is counted by the counting means 19a and recorded in the memory 15. The rotation speed conversion means 19b records the strength of the magnetic field due to the passage of the magnet 10 and converts it to a rotation speed. Thereby, it becomes possible to record the history of the rotation speed.

  The IC tag 9 is provided on the seal 8 in this embodiment, and since the seal 8 is exposed to the outside of the wheel bearing device, non-contact communication with the IC tag 9 is easily performed. Further, when the sensor 11 and the magnet 10 are attached to the seal 8 that is easily manufactured as compared with the case where the sensor is attached to a component processed through complicated processes such as the outer member 1, the hub wheel 2 </ b> A, the inner ring 2 </ b> B, and the like. The mounting work can be easily performed.

In the above embodiment, the case where the IC tag with sensor 9 and the magnet 10 are attached to the seal 8 has been described, but as shown in FIG. 4, between the rolling surfaces 5, 5, 6, 6 in both rows, The sensor-attached IC tag 9 may be attached to the outer member 1 and the magnet 10 may be attached to the inner member 2 so as to face the IC tag.
Further, as shown in FIG. 5, the sensor-attached IC tag 9 may be attached to the end face of the outer member 1 on the outboard side, and the magnet 10 may be attached to the side surface of the flange 2Aa of the hub wheel 2A so as to face this.

6 and 7 show this reference proposal example . In this wheel bearing device, an IC tag with sensor 9A having a temperature sensor 11A shown in FIG. 7 is attached to the wheel bearing device inside the bearing space. For example, the sensor-attached IC tag 9A is attached to the outer diameter surface of the inner member 2 between the rolling surfaces 6 and 6 in both rows.

  Similarly to the IC tag with sensor 9 in the first embodiment shown in FIG. 2, the sensor-attached IC tag 9 </ b> A is an input in which a signal is input to the CPU 14 by an input system different from the non-contact communication path from the antenna 13. A processing means 18A is provided, and a temperature sensor 11A is connected to the input processing means 18A. The input processing means 18A is composed of, for example, an A / D converter. In addition to this, the sensor-attached IC tag 9A is provided with a sensor input processing means 19A that takes in the input of the temperature sensor 11A and performs a predetermined storing process in the memory 15. The sensor input processing means 19A comprises a program for controlling the CPU 14, and is recorded in a ROM (not shown) or the like in the sensor-attached IC tag 9A. The sensor input processing means 19A operates if there is operating power equal to or higher than a predetermined voltage, and takes measures when power is insufficient.

  Further, unlike the case of the coil, the temperature sensor 11A generally requires a power source. Therefore, the driving power is obtained from the power supply circuit 17 built in the IC tag with sensor 9A. The power supply circuit 17 is obtained by non-contact communication from the antenna 13 and drives the CPU 14 and the transmission / reception circuit 16, and is provided with a capacitor (not shown) or the like for storing the power for driving the sensor 11A. Yes.

The IC tag with sensor 9A needs to be supplied with electric power for driving, and the power supply means 20 supplies power to the IC tag with sensor 9A at all times or when a predetermined condition is satisfied by non-contact communication. (FIG. 6) is provided. The power supply means 20 is provided, for example, in a tire house. Instead of the non-contact power supply means 20, a terminal (not shown) that can be connected to the power supply circuit 17 of FIG. 7 may be provided, and a battery or a generator may be connected to the terminal by wiring. As a generator, when a power generation type rotation detector (not shown) for controlling an antilock brake system or the like is provided in a wheel bearing device, the electromotive force can be used. Other configurations in the proposed example are the same as those in the first embodiment shown in FIGS.

In the case of this proposed example , by providing the IC tag 9A with a temperature sensor, it is possible to record the temperature history inside the bearing.

8 and 9 show other reference proposal examples . In this proposed example , an IC tag 9B with a strain sensor 11B is provided in place of the IC tag 9A with a temperature sensor 11A in the proposed examples shown in FIGS. The sensor-attached IC tag 9B with the strain sensor is attached to the root portion of the flange 2Aa of the hub wheel 2A. The IC tag 9B with strain sensor 11B is obtained by providing a strain sensor 11B as shown in FIG. 9 in place of the temperature sensor 11A in the IC tag 9A with temperature sensor of FIG. Other configurations in this proposed example are the same as those in the proposed example shown in FIGS.

  The root portion of the wheel mounting flange 2Aa of the hub wheel 2A is a portion having severe load conditions as a wheel bearing device. The strain sensor 11B of the sensor-attached IC tag 9B is attached to such a place, and the magnitude and number of times of the received stress are recorded. Thereby, the record can be read at the time of periodic inspection and the wheel bearing device can be replaced before reaching the fatigue limit.

FIG. 10 shows still another reference proposal example . This proposed example is obtained by attaching an IC tag 9B with a strain sensor to the flange 2Aa of the hub wheel 2A in the proposed example shown in FIG. The mounting position of the sensor-attached IC tag 9B is an outer diameter edge on the side surface on the inboard side of the flange 2Aa. It may not necessarily be the outer diameter edge, but may be a range from the vicinity of the center in the radial direction of the flange 2Aa to the outer diameter end. For example, as shown in FIG. 11, a recess 21 may be provided in the flange 2 </ b> Aa, and the IC tag with sensor 9 </ b> B may be attached in the recess 21. The recess 21 may be a through hole. These openings 21 can use a portion where the flesh of the flange 2A is stolen for weight reduction.

A brake rotor 22 is attached to the hub wheel 2A together with a wheel (not shown) with a bolt 23 for wheel attachment. The bolt 23 is press-fitted into a press-fitting hole 24 penetrating the flange 2A. The brake rotor 22 may be a brake disc or a brake drum. Other configurations in this proposed example are the same as those in the proposed example shown in FIGS.

When the strain sensor 11B (FIG. 9) of the IC tag 9B with sensor is attached to the outer diameter portion of the flange 2A to which the brake rotor 22 is attached as in this proposed example , the brake judder, that is, the flange surface during braking is applied. The vibration can be recorded. Thereby, the accuracy of flange runout can be confirmed in advance by periodic inspection.

The sensor-attached IC tag 9B with a strain sensor may be installed at the root portion of the wheel mounting bolt 23, for example , in addition to the above proposals . In this case, the magnitude and number of stresses received can be recorded on the sensor-attached IC tag 9B. By reading the recorded data in a non-contact manner, the wheel bearing device can be replaced before reaching the fatigue limit of the bolt 23. can do.
Further, by attaching a plurality of IC tags 9B with sensors to the rolling surfaces 5 and 6 and recording the detection values of the respective strain sensors 11B in the memory 15, the maximum stress position can be confirmed, and more accurate contact can be made. The corner can be confirmed.

FIG. 12 shows still another reference proposal example . In this proposed example , an IC tag 9C with a sensor having a water detection sensor (not shown) is provided in place of the IC tag 9A with a temperature sensor 11A in the proposed example shown in FIGS. . The IC tag with water sensor 9C is obtained by providing a water detection sensor in place of the temperature sensor 11A in the IC tag with sensor 9A of FIG.
The mounting position of the IC tag 9 </ b> C with the water sensor is in the bearing space between the outer member 1 and the inner member 2. For example, the inner peripheral surface of the outer member 1 and the outer peripheral surface of the inner member 2 between the seals 7 and 8 and the rolling surfaces 5 and 6 are used. The other configuration in this embodiment is the same as the proposed example shown in FIGS.

In the case of this proposed example, the history of water intrusion into the bearing can be recorded in the IC tag 9C. The wheel bearing device has water intrusion into the bearing depending on use conditions. It is difficult for conventional bearings to identify the route and timing of this water intrusion. For example, even if water enters and grease deteriorates, if water evaporates, the fact of water intrusion cannot be known. As in the above configuration, if a water detection sensor is provided in the IC tag 9C with sensor and the water detection sensor is arranged at a location that becomes the main path of water ingress, it is possible to monitor the ingress of water and at what stage the intrusion occurred or The number of times can be recorded as a history, which can be confirmed during regular inspections.

FIG. 13 shows still another reference proposal example of the present invention. In this example, instead of providing the sensor-equipped IC tag 9 and the magnet 10 in the first embodiment shown in FIGS. 1 and 2, a sensor unit 25 for detecting a detection target of the wheel bearing device is attached. An IC tag 9D for recording 25 sensor outputs is provided. The IC tag 9D in this case is an IC tag capable of non-contact communication such as the general RFID tag shown in FIG. 3, and has an external input terminal 9Da different from the non-contact communication path. The IC tag 9D with an external input terminal is provided in the sensor unit 25 or connected to a signal line that transmits a signal of the sensor unit 25 to an ECU (electric control unit) 26 of the automobile. The sensor 25a in the sensor unit 25 is a rotation sensor or a displacement sensor. Other configurations in this embodiment are the same as those in the first embodiment shown in FIG.

  In the case of this configuration, the IC tag 9D is not provided with a sensor, but the output of the sensor 25a can be used for the purpose of controlling the vehicle or the like and can be left as a history in the IC tag 9D. Therefore, the history of use of the wheel bearing device can be confirmed at the time of subsequent inspection, which can be used for life determination in periodic inspection.

  In addition, although each said embodiment demonstrated the case where all were applied to the 3rd generation type wheel bearing apparatus, this invention is applicable regardless of a generation form. Moreover, although each said embodiment demonstrated the case where it applied to the inner ring | wheel rotation type wheel bearing apparatus, this invention is applicable also to the outer ring | wheel rotation type wheel bearing apparatus.

It is the fragmentary sectional view of the wheel bearing apparatus concerning 1st Embodiment of this invention, and the expanded sectional view of the seal | sticker. It is a circuit block diagram of the IC tag with a sensor used for the wheel bearing device. It is a circuit block diagram of an example of a general IC tag. It is a fragmentary sectional view of other embodiment of this invention. It is a fragmentary sectional view of other embodiment of this invention. It is a fragmentary sectional view of a reference proposal example . It is a circuit block diagram of the IC tag with a sensor used for the wheel bearing device of the proposal example . It is a fragmentary sectional view of other reference proposal examples . It is a circuit block diagram of the IC tag with a sensor used for the wheel bearing device of the proposal example . It is a fragmentary sectional view of other reference proposal examples . It is a fragmentary sectional view of other reference proposal examples . It is a fragmentary sectional view of an embodiment of other reference proposal examples . It is a fragmentary sectional view of an embodiment of other reference proposal examples .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Outer member 2 ... Inner member 2A ... Hub wheel 2Aa ... Wheel mounting flange 2B ... Inner ring 3 ... Rolling elements 7, 8 ... Seal 9 ... Sensor-attached IC tags 9A-9C ... Sensor-equipped IC tag 9D ... IC Tag 10 ... magnet 11 ... sensor (coil)
11A ... temperature sensor 11B ... strain sensor 15 ... memory 17 ... power supply circuit 18 ... input processing means 19 ... sensor input processing means 19a ... counting means 19b ... rotational speed conversion means 20 ... feeding means 25 ... sensor unit

Claims (6)

An outer member having a double row rolling surface on the inner periphery, an inner member having a rolling surface opposite to the rolling surface, and a double row rolling interposed between the opposing rolling surfaces of the two members. In a wheel bearing device having a moving body and rotatably supporting the wheel with respect to the vehicle body,
An IC tag capable of non-contact communication is attached, and this IC tag is an IC tag with a sensor integrated with a sensor for detecting a detection target of a wheel bearing device and having a memory, and is separate from a non-contact communication path. input processing means for detecting signal of the sensor at the input system of the input provided, and the sensor input processing to be recorded on the memory by performing processing on the detection signal input through the input processing unit from said sensor Means for detecting the use state of the wheel bearing device with the sensor, and recording the detected use state as a history on the IC tag with sensor. The IC tag with sensor includes the outer member and The sensor is attached to one of the inner members, the sensor detects passage of a magnet attached to the other member, and the sensor input processing means is connected to the sensor. Wheel bearing device comprising a recording child in the memory a rotational speed obtained as the history from.   2. The sensor according to claim 1, wherein the sensor is a coil, and the IC tag with the sensor is attached to one member of a front outer member and an inner member, and the other member is rotated by relative rotation of both members. A wheel bearing device in which a magnet that passes in the vicinity is provided, and the IC tag uses the output of the coil as a power source.   3. The wheel bearing device according to claim 2, wherein the sensor-equipped IC tag is provided with counting means for counting the signal of the sensor when the magnet passes and storing it in a memory in the IC tag.   4. The wheel bearing device according to claim 2, wherein the sensor-attached IC tag is provided with means for converting a signal of the sensor when the magnet has passed into a rotational speed and recording the rotational speed on the IC tag.   5. The seal according to claim 2, wherein a seal that seals an end of a bearing space between the outer member and the inner member is provided, and the seal is formed of the outer member and the inner member. A combination type seal having a sealing element attached to one member and a sealing element attached to the other member, wherein the IC tag with sensor is attached to one of the sealing elements, and the magnet is attached to the other sealing element. Installed wheel bearing device. Oite to claim 1, said sensor-equipped IC tag, and a power supply circuit for the electric power obtained by the non-contact communication with the IC tag and the driving power of the sensor, the input sensor if there is more than a predetermined operating power Sensor input processing means for taking in and performing predetermined storage processing is provided, and power supply means for supplying electric power to the IC tag constantly or when a predetermined condition is satisfied by non-contact communication is provided for the wheel bearing device or the wheel. Wheel bearing device provided in a vehicle to which a bearing device for a vehicle is mounted.

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