JP2015130056A - IC tag structure with sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an IC tag structure with a sensor that is protected from a high voltage and can prevent a problem such as inability in communication and reduction in a communication area even when being installed in a high voltage apparatus.SOLUTION: An IC tag structure with a sensor includes: a tag body 2 installed in a high voltage apparatus; an IC chip 3 that is provided with the tag body 2 and monitors and stores the state of the high voltage apparatus; and an antenna wire 4 that is arranged on the tag body 2 in a loop formation to transmit monitoring data stored in the IC chip 3. The antenna wire 4 is composed of an insulation coating wire and semiconductive coating is applied on the installation surface of the high voltage apparatus where the tag body 2 is installed.

Description

  The present invention relates to a sensor-attached IC tag structure applied to high-voltage molding equipment such as a floating railway ground coil, molded transformer, and molded current transformer.

The high voltage molding equipment is an electric equipment in which a conductive metal is covered with an insulating resin, and is applied to a floating railway ground coil, a mold transformer, a mold current transformer, and the like.
Specifically, a mold transformer disclosed in Patent Document 1 in which a coil is embedded in an embedded state (mold) made of a resin material is known.

Moreover, in the high voltage molding apparatus as described above, an IC tag with a sensor including an IC chip that monitors and stores the state of the apparatus and an antenna that transmits the stored data may be installed.
For example, in a high-voltage device using a sensor-attached IC tag disclosed in Patent Document 2, a sensor-attached IC tag that can acquire a physical quantity to be detected is detachably attached to a position where communication with an external IC tag reader is possible It is shown.

  The sensor-equipped IC tag disclosed in Patent Document 2 can wirelessly transmit monitoring data related to the state of the device and send it to the control center, and the control center can manage the device.

JP 2008-28222 A JP 2008-99459 A

By the way, when an IC tag with a sensor as described above is installed in a high-voltage device, a high voltage is applied to an electronic component such as an IC chip in the sensor tag, which may cause a failure. In addition, due to the influence of the material of the high voltage device in which the sensor tag is installed, the resonance frequency of the antenna deviates from the reference value, and there is a problem that the communication area is remarkably reduced and communication cannot be performed.
Further, in order to improve the reduction of the communication area, the resonance frequency of the antenna may be adjusted. However, it is troublesome to adjust the resonance frequency of the IC tag with a sensor after being installed in a high voltage device. Additional work such as incorporating a special frequency adjustment circuit in advance in the attached IC tag is also required.

  The present invention has been made in view of the above-described circumstances, and provides an IC tag structure with a sensor capable of adjusting a resonance frequency with simple means even when installed in a high-voltage device. To do.

In order to solve the above problems, the present invention proposes the following means.
The present invention provides a tag main body installed in a high-voltage device, an IC chip provided on the tag main body and having a sensor for monitoring the state of the high-voltage device, and arranged in a loop on the tag main body. An IC tag structure with a sensor comprising: an antenna wire for transmitting monitoring data stored in an IC chip, wherein the antenna wire is composed of an insulation-coated electric wire, and the tag main body is installed on the high-voltage device. The installation surface is provided with a semiconductive coating.

According to the present invention, an antenna wire of an IC tag with a sensor is composed of an insulation-coated electric wire, and a semiconductive coating is applied to an installation surface of a high-voltage device on which the tag body is installed, so that an electronic device such as an IC chip in a sensor tag Components can be protected from high voltages.
In addition, the antenna wire can be formed to have a small diameter of a predetermined value (for example, 0.4 mm) or less, thereby increasing the inter-line capacitance (C) by increasing the spacing between the antenna wires, The influence of the capacitive component (C) between the semiconductive coatings on the resonance frequency of the antenna can be suppressed, the resonance frequency is lowered depending on the installation environment of the IC tag with the sensor (especially the semiconductive coating), and the communication area Reduction can be improved.

  In addition, the card base that forms the tag body is formed of an insulating film. The IC tag with sensor is installed on the side of the conductor installation location in the high-voltage equipment. Provide variable length part to adjust frequency / Install conductor member to adjust loop area of antenna in loop of antenna line / Cover IC chip and antenna line on tag main body from electronic environment Even if the IC tag with a sensor is installed in a high-voltage device by additionally providing various means such as installing a protective film of an insulator that protects the electronic component such as an IC chip, It is protected from a high voltage, and further, it is possible to prevent a problem that the communication area is remarkably reduced and communication cannot be performed.

It is a top view which shows the whole structure of the IC tag with a sensor which concerns on one Embodiment of this invention. It is sectional drawing which shows the state in which the IC tag with a sensor of FIG. 1 was installed in the outer surface of a high voltage apparatus. (A) Sectional drawing which shows the installation state of the antenna line in IC tag with a sensor, (B) is sectional drawing which shows the antenna line printed on the IC tag with a normal sensor. It is a graph which shows the relationship between the line width and resonance frequency in the antenna line which concerns on one Embodiment of this invention, and the printed antenna line used as a comparison object. (A) In the antenna line which concerns on one Embodiment of this invention, and the printed antenna line used as a comparison object, the relationship between the resonant frequency at the time of apply | coating semiconductive coating to the high voltage apparatus installation surface and an antenna line width is shown. It is a graph which shows the relationship between the shift amount of the resonant frequency at the time of apply | coating a semiconductive coating to the high voltage apparatus installation surface, and the antenna line | wire width. It is a top view which shows the modification 1 of the IC tag with a sensor which concerns on one Embodiment of this invention. It is a top view which shows the modification 2 of the IC tag with a sensor which concerns on one Embodiment of this invention. It is a top view which shows the modification 3 of the IC tag with a sensor which concerns on one Embodiment of this invention. It is a top view which shows the modification 4 of the IC tag with a sensor which concerns on one Embodiment of this invention. It is a top view which shows the modification 5 of the IC tag with a sensor which concerns on one Embodiment of this invention. The modification 6 of the IC tag with a sensor which concerns on one Embodiment of this invention is shown, (A) is a top view, (B) is sectional drawing.

An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows an IC tag 1 with a sensor according to the present invention, and FIG. 2 shows a high voltage device 50 in which the IC tag 1 with a sensor is installed.
As shown in these drawings, the sensor-equipped IC tag 1 includes a tag main body 2 installed in the high-voltage device 50, and an IC provided in the tag main body 2 for monitoring and storing the state of the high-voltage device 50. A chip 3 and an antenna wire 4 that is arranged in a loop on the tag body 2 and transmits monitoring data stored in the IC chip 3, and the antenna wire 4 is formed of an insulation-coated electric wire. ing.
The IC chip 3 has a fixed capacitor 3A inside and is connected to a sensor 6 via a connection line 5, and the sensor 6 uses the information related to the high-voltage device 50 (for example, temperature / vibration acceleration). In addition to the current monitoring data such as, the operation history data of the device is detected and stored in a memory (not shown) installed therein.

Further, the card base 7 constituting the tag body 2 of the sensor-attached IC tag 1 is formed of an insulating film, and this insulating film improves the insulation performance of the IC tag body 2 against the high voltage of the high-voltage device 50. .
Specific examples of the high-voltage device 50 include a high-voltage molded device such as a molded transformer and a molded current transformer, in addition to a floating railway ground coil used in a linear motor car. The high voltage device 50 of this example has a conductor 51 inside, and the conductor 51 is molded with a resin 52.

Further, as shown in FIG. 3A, a semiconductive coating D is formed on the back surface of the tag main body 2 of the IC tag with sensor 1 and on the installation surface of the high voltage device 50 on which the tag main body 2 is installed. It has been subjected.
This semiconductive coating D alleviates the electric field concentration of the high voltage device 50 and prevents the IC tag body 2 from being damaged by the high voltage.
Specifically, when a metal is disposed on the back surface of the tag body 2, communication becomes impossible due to the influence of a reflected wave from the metal, or the communication frequency is remarkably narrow due to an increase in the resonance frequency from the reference value. There is a case. Further, when the entire tag body 2 is covered with a semiconductive coating, there is a problem that electromagnetic waves are shielded and communication becomes impossible. In order to prevent the occurrence of such a problem, in this example, the semiconductive coating D is applied only to the installation surface of the high voltage device 50 on which the tag body 2 is installed.
For the semiconductive coating D, a paint in which metal particles or carbon is mixed as a filler is used. However, if the resistance value is the same as that of a normal metal, as described above, communication may not be possible due to the influence of reflected waves from the metal, or the communication area may be significantly narrowed due to an increase in resonance frequency. Therefore, it is required that the resistance value is sufficiently large (for example, 100Ω to 10,000Ω) with respect to a general metal. In FIG. 2, the semiconductive coating D is applied to the entire surface of the mold 52, but the coating location is not limited to the entire surface of the mold 52, but only on the installation surface of the IC tag 1 with sensor and only on the periphery of the installation surface. Even if it exists, these semiconductive coatings D should just be earth | grounded.

As shown in FIG. 2, the installation position of the tag main body 2 of the IC tag with sensor 1 with respect to the high voltage device 50 is installed on the side of the installation location of the conductor 51 in the high voltage device 50.
This is because when the sensor-attached IC tag 1 is installed on the back side of the conductor 51 in the high-voltage device 50, the electromagnetic wave from the antenna 4 is affected by the reflected wave from the conductor 51. FIG. As shown, in order to prevent the influence (indicated by an arrow m), the IC tag with sensor 1 is installed on the side of the conductor 51 of the high-voltage device 50.

Next, the configuration of the antenna line 4 of the present embodiment will be specifically described with reference to FIGS.
As shown in FIG. 3A, the antenna line 4 of the sensor-attached IC tag 1 described above is constituted by an insulated coated electric wire having a line width of 0.4 mm or less, and is adhered to the tag main body 2. Further, a normal antenna line (indicated by reference numeral 60) is installed on the tag main body 2 by a printing process as shown in FIG.

Next, the relationship between the line width of the antenna wire 4 according to the present invention and the resonance frequency will be described with reference to FIG.
In FIG. 4, antenna wires 4 indicated by reference numerals (1) to (3) are antenna wires according to the present invention manufactured by an insulation-coated electric wire, and each line width (d1) is 0.26 mm, 0. It is set to 32 mm and 0.4 mm. The antenna line indicated by reference numeral (4) is produced by printing, and the line width (d2) is set to 0.8 mm, and the distance between the lines is set to 0.3 mm.
In each antenna indicated by reference numerals (1) to (4), the left bar graph (with diagonal lines) is a form before the semiconductive coating D is applied to the installation surface of the high voltage device 50 on which the tag body 2 is installed. In addition, the bar graph on the right side (without diagonal lines) shows the measurement results of the form after the semiconductive coating D is applied.

Moreover, although the line width of the antenna wire 4 (antenna wires (1) to (3)) according to the present invention is 0.4 mm or less, the antenna wire is produced by printing (antenna wire (4)). Since the film thickness is reduced, it is necessary to increase the line width in order to reduce the resistance value of the antenna line. For this reason, the line width is set to 0.8 mm.
Furthermore, in the case of an antenna line by printing, it is necessary to widen the line to prevent a short circuit, but the resistance value of the antenna line is low in the antenna line 4 of the insulated wire according to the present invention, and further, since it is insulated, The line width can be narrowed and the space between the lines can be increased.

And when comparing the antenna wires indicated by the above-mentioned symbols (1) to (4), the antenna wire 4 (antenna wires (1) to (3)) of 0.4 mm or less according to the present invention manufactured by an insulation-coated wire. Therefore, it is confirmed that the decrease in the resonance frequency from the reference value (in this example, around 13.56 MHz) is suppressed to a low level regardless of whether or not the semiconductive coating D is applied, and there is almost no influence on communication. . On the other hand, in the printed antenna line (antenna line (4)) shown as the comparative example, particularly when the semiconductive coating D is applied, the resonance frequency is reduced to 12.485 MHz, and communication is performed. Has been confirmed to be difficult.
That is, in the present embodiment, in order to alleviate the electric field concentration of the high-voltage device 50 and prevent the IC tag main body 2 from being damaged by a high voltage, the tag main body 2 of the sensor-equipped IC tag 1 is installed. Even when the semiconductive coating D is applied to the installation surface of the voltage device 50, the antenna wire 4 (antenna wires (1) to (3)) is configured with an insulation coated electric wire having a line width of 0.4 mm or less. It has been confirmed that if the distance between the lines is increased, the decrease in the resonance frequency can be suppressed and the reduction in the communication area can be suppressed.

5A and 5B show a summary of the line widths and resonance frequencies of the antenna wires (antenna wires (1) to (4)) in the form to which the semiconductive coating D is applied.
As shown in FIGS. 5A and 5B, a semiconductive coating D is applied to the installation surface of the high voltage device 50 on which the tag body 2 of the IC tag 1 with sensor is installed, and the line width is 0.4 mm. It is confirmed that the sensor-attached IC tag 1 in which the antenna wire 4 (antenna wires (1) to (3)) is constituted by the following insulated coated wires can suppress the decrease in the resonance frequency and the communication area. Has been.

  In the sensor-equipped IC tag 1 shown in the above embodiment, the installation surface of the high-voltage device 50 is subjected to the semiconductive coating D, and the antenna wire 4 (antenna wires (1) to (1)- (3)) is configured, but when finely adjusting the resonant frequency of the sensor-equipped IC tag after it is installed in a high-voltage device to further suppress the reduction of the communication area, the following modifications 1 to 6 are performed. May be.

(Modification 1)
As shown in FIG. 6, a variable length portion 10 that finely adjusts the resonance frequency by changing the length of a part of the antenna line 4 may be provided on a part of the antenna line 4 of the IC tag with sensor 1. .
The variable length portion 10 is composed of a variable length loop portion 11 positioned between the antenna line 4 and the IC chip 3 and changes the size (area S) of the variable length loop portion 11. As a result, the inductance (L component) is finely adjusted so that the resonance frequency of the antenna line 4 matches the use condition.

Specifically, after the IC tag 1 with the sensor is installed in the high voltage device 50, the variable length loop portion 11 is formed by the conductive wires 4A and 4B that are located at the end of the antenna wire 4 and constitute a part of the antenna wire 4. By configuring and enlarging the loop area (indicated by S) of the conducting wires 4A and 4B, the inductance can be increased and the resonance frequency can be lowered, and the loop area S of the conducting wires 4A and 4B can be reduced. By doing so, the inductance can be lowered and the resonance frequency can be raised.
As a result, even after the sensor-equipped IC tag 1 is installed and fixed to the high voltage device 50, the resonance frequency of the antenna wire 4 can be easily finely adjusted by changing the loop area S of the conducting wires 4A and 4B. It can be carried out.

(Modification 2)
In the first modification shown in FIG. 6, the variable length loop portion 11 capable of adjusting the loop area S of the two conductors 4 </ b> A and 4 </ b> B is installed at the end of the antenna wire 4 as the variable length portion 10. In the variable length loop section 12, as shown in FIG. 7, by adjusting the length of one of the two conductors 4A and 4B, the loop area S is changed to change the resonance frequency. Fine adjustment may be made.
Specifically, as shown in FIG. 7, with one conductor 4B constituting the antenna wire 4 arranged in a straight line, the other conductor 4A is slackened, and the resonance frequency is reduced by the slack of the conductor 4A. You may adjust it. Specifically, by reducing S1 or expanding S2 in the loop area (indicated by reference numerals S1 and S2), the inductance can be increased and the resonance frequency can be lowered, and the conductor 4A , 4B can be increased, or the resonance frequency can be increased by reducing the inductance by increasing S2 or reducing S2.

(Modification 3)
In the variable length part 10 of the modification 2 shown in FIG. 7, the loop areas S1 and S2 of the two conductors 4A and 4B constituting the antenna line 4 are changed, but in the variable length loop part 13 of the modification 3, As shown in FIG. 8, by adjusting the length of one of the two conductive wires 4C and 4D, the loop area between the conductive wire 4D and the main body 4E of the antenna wire 4 is adjusted. The resonance frequency may be finely adjusted by changing S3.
Specifically, as shown in FIG. 8, one conductor 4C constituting the antenna line 4 is connected from the IC chip 3 to the main body 4E of the antenna line 4, and the other conductor 4D is connected to the antenna line 4 as shown in FIG. The resonance frequency may be finely adjusted according to the position of the slack of the conducting wire 4D.
Specifically, by moving the lead wire 4D in the direction of arrow a and enlarging the loop area (indicated by reference numeral S3) located above the conductor 4D, the inductance can be raised and the resonance frequency can be lowered. Further, by moving the conducting wire 4D in the direction of the arrow b and reducing the loop area S3 of the conducting wire 4D, the inductance can be lowered and the resonance frequency can be raised.

(Modification 4)
In Modifications 1 to 3, the resonance frequency was finely adjusted by changing the loop area of the variable length loop parts 11 to 13 (variable length part 10) located at the end of the antenna wire 4, but in Modification Example 4, As shown in FIG. 9, the variable length portion 10 may be installed in the middle of the antenna wire 4 to finely adjust the resonance frequency.
Specifically, as shown in FIG. 9, one conductor 4F constituting the antenna line 4 is connected to the main body 4G of the antenna line 4 from the IC chip 3 and positioned in the middle of the antenna line 4. The conducting wire 4H may be slackened, and the resonance frequency may be finely adjusted depending on the slack position of the conducting wire 4H.
Specifically, the lead wire 4H is moved in the direction of arrow c to increase the loop area (indicated by reference numeral S4) located on the right side of the lead wire 4H in the figure, thereby increasing the inductance and lowering the resonance frequency. In addition, by moving the lead wire 4H in the direction of the arrow d to reduce the loop area S4, the inductance can be reduced and the resonance frequency can be increased.

(Modification 5)
In the first to fourth modifications, the variable length portion 10 that finely adjusts the resonance frequency by changing the length of a part of the antenna line 4 is provided in a part of the antenna line 4 of the sensor-attached IC tag 1. However, the present invention is not limited to this, and a conductor member 20 may be provided as shown in FIG.
The conductor member 20 is installed in the loop of the IC chip 3 and the antenna wire 4 on the tag main body 2 to adjust the loop area of the antenna wire 4. Further, the conductor member 20 is detachably installed on the plane on the tag main body 2, and the installation position for optimally adjusting the resonance frequency can be changed.

(Modification 6)
In addition to the first to fifth modifications, a protective film 21 that covers the IC chip 3 and the antenna wire 4 and protects electronic components from the external environment may be installed on the tag body 2. As shown in the plan view of FIG. 11A and the cross-sectional view of FIG. 11B, the protective film 21 is an insulation formed in the same shape as the card base 7 constituting the tag body 2 or slightly smaller. By stacking on the top of the body, the IC chip 3 and the antenna wire 4 are protected from an external environment such as dust, moisture, and ultraviolet rays.

As described in detail above, according to the sensor-equipped IC tag 1 shown in the present embodiment, the antenna wire 4 connected to the IC chip 3 is composed of an insulation-coated electric wire, and the high-voltage device in which the tag body 2 is installed. The IC tag body 2 is protected from the high voltage of the high-voltage device 50 by applying the semiconductive coating D to the 50 installation surfaces.
Further, the antenna wire 4 can be formed to have a small diameter of a predetermined value (for example, 0.4 mm) or less, and thereby the distance between the antenna wires 4 is increased to increase the capacitance (C) between the antennas. The influence of the capacitive component (C) between the wire and the semiconductive coating on the resonance frequency of the antenna can be suppressed. As a result, even when the IC tag with a sensor is installed near the high voltage device 50, A significant decrease in the resonance frequency depending on the installation environment (especially a semiconductive coating) and a significant reduction in the communication area can be improved.
In addition, the antenna wire 4 of the IC tag with sensor 1 according to the present embodiment is constituted by an insulation-coated electric wire, and the semiconductive coating D is applied to the installation surface of the high voltage device 50 on which the tag body 2 is installed. Even when installed in high-voltage equipment, electronic components such as IC chips are protected from high voltages, and the decrease in resonance frequency is suppressed. As in the past, extra circuits such as special frequency adjustment circuits are incorporated. No configuration is required.

  In the sensor-equipped IC tag 1 of the above embodiment, the antenna wire 4 connected to the IC chip 3 is made of an insulation-coated electric wire, and the semiconductive coating D is provided on the installation surface of the high-voltage device 50 on which the tag body 2 is installed. In addition to this, in addition to this, a variable length part 10 for finely adjusting the resonance frequency by changing the length of a part of the antenna line 4 is provided / the loop of the antenna in the IC chip 3 loop. Various modifications shown in the first to sixth modifications such as installing the conductor member 20 for adjusting the area / installing the protective film 21 of the insulator covering the antenna wire 4 and protecting from the external environment on the tag body 2 By providing the means additionally and selectively, even when the IC tag with sensor is installed in the high voltage device 50, the electronic components such as the IC chip are protected from the high voltage, and further, the communication area can be reduced, The signal is a problem that can not be can be reliably prevented.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

  The present invention relates to a sensor-attached IC tag structure applied to high-voltage molding equipment such as a floating railway ground coil, molded transformer, and molded current transformer.

DESCRIPTION OF SYMBOLS 1 IC tag with a sensor 2 Tag main body 3 IC chip 4 Antenna wire 4A Conductor 4B Conductor 4C Conductor 4D Conductor 4E Main part 4F Conductor 4G Main part 4H Conductor 6 Sensor 7 Card base 10 Variable length part 11 Variable length loop part 12 Variable length loop part 12 Part
13 Variable length loop portion 20 Conductive member 21 Protective film 50 High voltage device 51 Conductor 52 Mold D Semiconductive coating

Claims (10)

A tag main body installed in a high voltage device, an IC chip provided on the tag main body and having a sensor for monitoring the state of the high voltage device, and arranged in a loop on the tag main body and stored in the IC chip An IC tag structure with a sensor comprising an antenna line for transmitting the monitored data,
The sensor-attached IC tag structure, wherein the antenna wire is formed of an insulation-coated electric wire, and a semiconductive coating is applied to an installation surface of the high-voltage device on which the tag body is installed.   2. The IC tag structure with a sensor according to claim 1, wherein the card base constituting the tag main body is formed of an insulating film.   3. The IC tag structure with a sensor according to claim 1, wherein an installation position of the tag main body with respect to the high-voltage device is a side of a conductor installation location in the high-voltage device. .   The IC tag with a sensor according to any one of claims 1 to 3, wherein a wire width of the insulation-coated electric wire constituting the antenna wire is set to 0.4 mm or less and a space between the wires is dense. Construction.   The variable length part which adjusts the resonance frequency by changing the length of a part of the antenna line is formed in a part of the antenna line. An IC tag structure with a sensor according to 1.   6. The sensor-attached IC tag structure according to claim 5, wherein the variable length portion includes a variable length loop portion positioned between the antenna line and the IC chip.   The IC tag structure with a sensor according to claim 6, wherein the variable length loop portion is formed by adjusting a length of one of the two conductors of the antenna line.   The sensor-equipped IC tag structure according to claim 5, wherein the variable length portion is disposed in the middle of the antenna line.   The sensor according to any one of claims 1 to 8, wherein a conductor member for adjusting a loop area of the antenna is installed in a loop of the antenna line on the tag main body. IC tag structure with.   The protective film of the insulator which covers an IC chip and an antenna wire and protects an electronic component from an external environment is installed on the tag main body. The IC tag structure with a sensor as described.

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