JP2000315051A - Id tag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ID tag excellent in discriminability even when it is put on a discrimination object with a relatively high ratio of a metallic part in the case of marking by putting it on the discrimination object. SOLUTION: This ID tag is comprised of a semiconductor chip 10 storing information on a discrimination object B, and an antenna coil 12 capable of transmitting and receiving the information in the semiconductor chip 10 between the tag and a transmitter/receiver device C arranged externally. In this case, the antenna coil 12 is provided with a magnetic material 14a in the inside thereof and also provided with a magnetic material 14b in the outer peripheral part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ID tag for identifying an object in a non-contact manner.

[0002]

2. Description of the Related Art Hitherto, ID tags such as labels and tags have been used to identify the type of an object and to display information such as the unit price of the object. The ID tag is used by being attached to the identification target object such as by sticking it to the surface of the identification target object which is the object from which information is to be acquired.

In recent years, an ID tag capable of contactlessly obtaining information on an identification target includes a semiconductor chip storing information on the identification target, and an antenna capable of outputting information in the semiconductor chip. Non-contact ID tags are being considered. The ID tag receives a radio wave of a specific frequency transmitted from an external receiving / transmitting device by an antenna, and responds to the received radio wave to transmit information of the semiconductor chip to the transmitting / receiving device. It operates by transmitting using.

[0004]

On the other hand, construction machines, industrial machines, plant equipment, machine parts, axles of railway vehicles, etc.
In the case of an object having a relatively high ratio of a metal portion, it has been conventionally performed to display and manage a serial number or the like by engraving, paint, or the like. However, with these display methods, over time, dirt such as oil and iron powder adheres, and the discriminability decreases,
There is a problem that the display is worn and the discrimination is likely to be deteriorated, and a display method with excellent discrimination is desired.

[0005] Therefore, in order to identify an identification object having a relatively high ratio of the metal portion, it has been considered to attach an ID tag having an antenna as described above. When attached to the surface, there is a problem that the discriminability is lower than when attached to the surface of an object to be identified in which the ratio of metal parts is relatively low.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a semiconductor chip for storing information of an object to be identified and an externally provided information of the semiconductor chip. An antenna capable of receiving and transmitting to and from the receiving / transmitting device, and attaching and marking the object to be identified
An object of the present invention is to provide an ID tag which is a D tag and has excellent discrimination even when attached to an object to be identified having a relatively high ratio of metal parts.

[0007]

SUMMARY OF THE INVENTION An ID tag according to the present invention is capable of transmitting and receiving information between a semiconductor chip for storing information of an object to be identified and a transmitting and receiving device provided outside the semiconductor chip. In an ID tag having a simple antenna coil, the antenna coil is provided with a magnetic material on an inner portion of the coil and a magnetic material on an outer peripheral portion thereof.

The above-mentioned antenna coil is formed of a cylindrical magnetic material having a groove on one end surface into which the antenna coil can be inserted.
It is preferable to be provided so as to be inserted into the groove. Further, it is preferable that a thread is provided on the outer peripheral surface of the ID tag, and it is preferable that an elastic body protruding from a case housing the magnetic material and the semiconductor chip is provided on the outer peripheral surface of the ID tag. In addition, a thread is provided on the outer peripheral surface of the ID tag, and an enlarged portion is provided on one end surface, and an elastic body is provided outside the outer peripheral surface of the ID tag between the enlarged portion and a nut screwed into the thread. It is preferable to provide.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An ID tag according to the present invention will be described with reference to the drawings. FIGS. 1A and 1B are diagrams illustrating a first embodiment of an ID tag according to the present invention, wherein FIG. 1A is a front view showing a cutaway view, FIG. 1B is a side view showing a cutaway view, and FIG. FIG. 3 is a cutaway front view for explaining a state where it is attached to an identification object. 2 to 6 are diagrams illustrating another embodiment of the ID tag according to the present invention.

In the first embodiment of the ID tag according to the present invention, as shown in FIG. 1, a semiconductor chip 10 for storing information of an identification target B and information of the semiconductor chip 10 are provided outside. An ID in which an antenna coil 12 that can receive and transmit to and from the transmitting and receiving device C is built in a cylindrical case 16.
Tag A. In addition, a magnetic body 14 a is provided on an inner portion of the antenna coil 12, and a magnetic body 14 b is provided on an outer peripheral portion of the antenna coil 12.

A part of the ID tag A is exposed by being partially embedded and attached to the axle of the railway vehicle as the identification object B. The identification target B is not particularly limited as long as it has a relatively high ratio of metal parts, such as railcar parts, construction machinery, industrial machinery, plant equipment, construction machinery, and mechanical components. Alternatively, it may be attached to an object having a low metal portion ratio.

The ID tag A includes a semiconductor chip 10, an antenna coil 12, magnetic members 14a and 14b, etc.
After sealing with 8, it is built in a cylindrical case 16. The antenna coil 12 determines the frequency of the electromagnetic wave transmitted from the transmitting / receiving device C,
Is set to be tuned to the frequency of the electromagnetic wave to be transmitted. When the frequency of the electromagnetic wave transmitted / received to / from the transmitting / receiving device C is relatively low, a capacitor or the like may be built in and connected to the antenna coil 12.

The semiconductor chip 10 stores information unique to the identification target B, for example, information such as the type of the identification target B, a serial number, and a constituent material name. The semiconductor chip 10 includes a circuit for modulating and demodulating electromagnetic waves, a capacitor unit, and a CP for performing calculations and the like, if necessary.
A U part or the like may be provided. If the capacitor provided in the semiconductor chip 10 and the antenna coil 12 can resonate with the electromagnetic wave transmitted from the transmitting / receiving device C or the electromagnetic wave transmitted to the transmitting / receiving device C, the capacitor of the individual component is not incorporated. May be.

The antenna coil 12 is electrically connected to the semiconductor chip 10 and is formed in a coil shape using a conductive wire or a columnar magnetic body 14a.
And a metal paste formed by printing a metal paste on the outer peripheral surface of the substrate.

The ID tag A has a magnetic body 14a on the inner side of the antenna coil 12 and a magnetic body 14b on the outer periphery. As a result, the attenuation of the magnetic field lines is reduced, so that electromagnetic waves having a relatively high intensity can be transmitted and received.
Even when attached to the ID tag, transmission / reception becomes possible, and the ID tag A with excellent discrimination is obtained. The magnetic body 14 is
It has higher magnetism than air or resin, and examples thereof include ferrite.

As a method of manufacturing the ID tag A, for example, after the antenna coil 12 to which the semiconductor chip 10 is connected is inserted into the cylindrical magnetic body 14a, the cylindrical magnetic body 14b is inserted, and then the resin As shown in FIG. 2, a method of manufacturing by sealing in
A bottomed base into which a coiled antenna coil 12 having a semiconductor chip 10 connected to a cylindrical magnetic body 14a and a cylindrical magnetic body 14b into which the wound coil can be inserted are inserted. 20 is formed, and the wound product and the cylindrical magnetic body 14b are connected to the base 2
0, and then sealed with a resin 18 or housed in a case 16 for manufacturing. As shown in FIG. 3, a cylindrical magnetic member having a groove 141 on one end surface into which an antenna coil 12 can be inserted is provided. After the antenna coil 12 having the semiconductor chip 10 connected thereto is inserted into the groove 141 of the body 14, the antenna coil 12 is sealed with a resin 18 or housed in a case 16 for manufacturing.

The antenna coil 1 as shown in FIG.
In the case of the method of inserting the antenna coil 12 into the groove 141 of the cylindrical magnetic body 14 having the groove 141 into which the groove 141 can be inserted on one end face, the antenna coil 12 has the magnetic body 14 at one end face. In particular, the attenuation of the lines of magnetic force is reduced, and the thickness and size of the ID tag A can be reduced, which is preferable. The antenna coil 12 is wound around a cylindrical magnetic body 14a as shown in FIG. Also, in the case of using the cylindrical magnetic body 14b, if the base 20 is formed of a magnetic body, the attenuation of the lines of magnetic force is similarly reduced, and the ID tag A can be made thinner and smaller. It is preferable.

As shown in FIG. 7A, when an electromagnetic wave output from an external transmitter / receiver C is received by the antenna coil 12, the ID tag A generates an electromotive force of the received electromagnetic wave. The energy is supplied to the modulation / demodulation unit, the control unit, and the like, and the information of the identification target B stored in the memory unit can be transmitted from the antenna coil 12 to the transmission / reception device C. FIG. 7 (b)
As shown in FIG. 1, a battery for supplying power to the semiconductor chip 10 and the like is also incorporated in the ID tag A, and information on the identification target B stored in the semiconductor chip 10 is stored by the power supplied from the battery. The information may be transmitted to the transmission / reception device C. However, when the information of the semiconductor chip 10 is configured to be transmitted to the transmission / reception device C by the electromotive energy of the received electromagnetic wave, the battery may not be built in. Therefore, replacement of the battery is not required, and workability is improved.

As shown in FIG. 4A, when a spiral screw thread 22 is provided on the outer peripheral surface of the ID tag A, an identification object B is formed with a concave portion to be screwed with the screw thread 22. If the ID tag A is attached by screwing the screw thread 22 into the concave portion, the ID tag A can be firmly attached to the identification target B, and can be detached when necessary, which is preferable. In this case, as shown in FIG.
If a groove 24 that can be fitted with a rotary jig such as a screwdriver or a wrench is formed on the end surface of the D tag A, the ID tag A can be screwed into the identification target B using the rotary jig. The ID tag A can be easily attached to a portion where a protrusion or the like is provided around the periphery, and the ID tag A is excellent in attachment convenience. The groove 24 may be a minus character that can be fitted with a flathead screwdriver, a cross shape that can be fitted with a plus driver, or a hexagonal shape that can be fitted with a hexagon wrench.

As shown in FIG. 5, when the ID tag A is provided with an elastic body 26 protruding outside the outer peripheral surface from the case 16 accommodating the magnetic material 14, the semiconductor chip 10, and the like, on the outer peripheral surface of the ID tag A, This is preferable because it can be attached relatively firmly without threading the object B.

As shown in FIG. 6A, a thread 22 is formed on the outer peripheral surface of the ID tag A, and an enlarged portion 28 having a larger diameter than the portion where the thread 22 is formed is formed on one end face portion. And, as shown in FIG.
After the elastic body 26 is inserted into the D tag A, the nut 30 is screwed into the screw thread 22, so that the outer peripheral surface of the ID tag A between the enlarged portion 28 and the nut 30 screwed into the screw thread 22. When the elastic body 26 is provided on the outside, FIG.
As shown in (c), when the ID tag A or the nut 30 is rotated, the elastic body 26 is tightened, and the amount of protrusion outside the elastic body 26 can be increased. The tag A can be firmly attached, and can be removed if necessary.

[0022]

As described above, the ID tag according to the present invention has a magnetic material on the inner portion of the antenna coil and a magnetic material on the outer peripheral portion of the antenna coil. Can be sent and received,
Even when the tag is attached to an object to be identified having a relatively high ratio of metal parts, the ID tag has excellent discriminability.

In the ID tag according to the second aspect of the present invention, in addition to the above-mentioned effects, since the one end face of the antenna coil has a magnetic material, the attenuation of the lines of magnetic force is reduced, and the ID tag is made thinner and smaller. Will be possible.

An ID according to claims 3 and 5 of the present invention.
In addition to the above-described effects, the tag can be firmly attached to the object to be identified, and can be removed if necessary.

The ID tag according to the fourth aspect of the present invention, in addition to the above effects, can be attached relatively firmly without cutting the object to be identified.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a first embodiment of an ID tag according to the present invention, wherein (a) is a cutaway front view,
(B) is a cutaway side view, and (c) is a cutaway front view illustrating a state of attachment to an identification object.

FIG. 2 is an exploded perspective view illustrating a main part of an ID tag according to a second embodiment of the present invention.

FIGS. 3A and 3B are diagrams illustrating main parts of an ID tag according to a third embodiment of the present invention, wherein FIG. 3A is an exploded perspective view and FIG. 3B is a cross-sectional view of a magnetic body.

FIGS. 4A and 4B are diagrams illustrating a fourth embodiment of the ID tag according to the present invention, wherein FIG.
(B) is a side view.

FIG. 5 is a diagram illustrating an ID tag according to a fifth embodiment of the present invention, wherein FIG.
(B) is a front view.

FIG. 6 is a front view illustrating an ID tag according to a sixth embodiment of the present invention.

FIG. 7 is a block diagram illustrating a first embodiment of an ID tag according to the present invention.

[Explanation of symbols]

 Reference Signs List A ID tag B object to be identified C transmitting / receiving device 10 semiconductor chip 12 antenna coil 14 magnetic body 141 groove 16 case 18 resin 22 screw thread 26 elastic body 28 enlarged section 30 nut

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yutaka Maeda 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. Terms (reference) 5B035 BA03 BB09 CA01 CA23

Claims (5)

[Claims] 1. An ID tag comprising: a semiconductor chip for storing information of an object to be identified; and an antenna coil capable of transmitting and receiving information of the semiconductor chip to a transmitting / receiving device provided outside. An ID tag comprising a magnetic material on an inner portion of the coil and a magnetic material on an outer peripheral portion thereof. 2. The ID according to claim 1, wherein the antenna coil is provided by being inserted into the groove of a cylindrical magnetic body having a groove on one end surface into which the antenna coil can be inserted. tag. 3. The ID tag according to claim 1, wherein a thread is provided on an outer peripheral surface of the ID tag. 4. The ID tag according to claim 1, further comprising an elastic body protruding from a case for housing the magnetic body and the semiconductor chip on an outer peripheral surface of the ID tag. 5. An ID tag having a thread on an outer peripheral surface thereof, an enlarged portion on one end surface, and a resilient outer surface of the ID tag between the enlarged portion and a nut screwed into the thread. The ID tag according to claim 1, further comprising a body.