JP2007081647A - Vertical magnetic field sensor system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a strong magnetic field vertical (perpendicular) to a metal face. <P>SOLUTION: A magnetic path parallel to the metal face M and a magnetic path vertical (perpendicular) to the metal face M are continuously provided. A coil 2 is excited after being wound around the magnetic paths. It is possible to obtain a large gain (6 dB), and also, the strong magnetic field (Magnetic Jet Field) vertical to the metal face M by reversely utilizing mirror effects of the metal face M. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vertical magnetic field sensor system according to a technique using an RFID tag or sensor using a magnetic field by a coil on a metal body or a metal surface.

  An RFID tag using a non-contact IC card and a coil and a reader / writer sensor used therewith use a vibration electromagnetic field such as a high frequency, and the sensitivity significantly deteriorates due to a mirror effect when approaching a metal body or a metal surface.

  This is because the characteristics when the metal surface does not exist are impaired by the mirror effect caused by the metal surface and the electrolysis and magnetic field being canceled by the reverse phase current.

  There is also a method called an on-metal tag, in which a magnetic substance is inserted to create a magnetic field escape field between the RFID coil and the metal surface to suppress the decrease in sensitivity. The influence of is inevitable. In other words, this method is a passive method.

  In addition, as described in the IC tag system of Patent Document 1, the method performed by the present applicant is to use a metal surface positively and compare the case where there is no metal surface and the case where there is a metal surface. When it did, when the metal surface was present, the magnetic flux was doubled by the mirror effect, that is, accompanied by an increase in voltage of 6 dB. This method is a method of positively using a metal surface, but it is a method of enhancing a magnetic field parallel to the metal surface. The magnetic field at the center of the magnetic body (core) was in a direction parallel to the metal surface.

On the other hand, as described in the non-contact type sensor coil of Patent Document 2, another method performed by the present applicant is oblique to the metal surface in order to sharpen the magnetic field having a component perpendicular to the metal surface. In this method, only the vertical component is generated by repulsion of the opposing magnetic field and the magnetic field. Although this method can obtain a sharp vertical magnetic field, the strongest magnetic field at the center parallel to the core axis collides and cancels out, so there is a disadvantage that the main magnetic field component is canceled out.
JP 2003-317052 A JP 2003-318634 A

  It is best to use a mechanism (phenomenon) that generates a double voltage by a magnetic field (magnetic current) parallel to the metal surface by using the metal surface, and to effectively generate a magnetic field perpendicular to the metal surface. It will be good.

  The present invention has been made paying attention to the above points, and it is an object of the present invention to provide a vertical magnetic field sensor system for constructing a prometal tag and a sensor system for strengthening a vertical magnetic field.

In order to achieve the object of the present invention,
A vertical magnetic field sensor system in a response system including an IC for generating a signal, comprising: a coil wound around a magnetic body for non-contact coupling at input and output, wherein the coil is wound The axis of the magnetic body is formed of a portion that is substantially continuous with a portion parallel to the metal surface and substantially perpendicular or perpendicular to the metal surface.

  According to a second aspect of the present invention, in the vertical magnetic field sensor system according to the first aspect, a coil is wound around the core of the vertical portion along the magnetic core.

  According to a third aspect of the present invention, in the vertical magnetic field sensor system according to the first or second aspect, a metal plate is placed alongside a coil wound around a magnetic material.

  According to a fourth aspect of the present invention, in the vertical magnetic field sensor system according to the first or second aspect of the present invention, the metal plate is also placed along the portion of the magnetic body that stands up vertically.

  According to a fifth aspect of the present invention, in the vertical magnetic field sensor system according to the first or second aspect of the present invention, an even number or an odd number is arranged so that the vertically rising magnetic bodies are aligned.

  According to a sixth aspect of the present invention, in the vertical magnetic field sensor system according to the first or second aspect, recording of various sensors is performed on the IC.

  As described in claim 7, in the vertical magnetic field sensor system according to claim 1 or 2, the sensor is attached to a reader / writer.

  As described in claim 8, in the vertical magnetic field sensor system according to any one of claims 1, 2, and 5, when two or more of the sensors are combined, they are fixed via a metal plate.

  According to a ninth aspect of the present invention, in the vertical magnetic field sensor system according to the first or second aspect, a supercapacitor, a large-capacitance capacitor, or a battery is mounted to be an active tag.

  According to a tenth aspect of the present invention, in the vertical magnetic field sensor system according to the first or second aspect, the tag or sensor is packaged with plastic or ceramic for protecting the tag or sensor.

  11. The vertical magnetic field sensor system according to claim 1, wherein when the tag or sensor is packaged, the bottom part of the package is a metal attached to the tag or sensor. A board is used.

  As described in claim 12, in the vertical magnetic field sensor system according to any one of claims 1, 2, and 10, when the tag or sensor is attached to a metal body or a metal surface, an attachment portion is installed on the tag or sensor. It is characterized by being.

  According to a thirteenth aspect of the present invention, in the vertical magnetic field sensor system according to any one of the first, second, and tenth aspects, characters, numbers, or marks are added to make the top and bottom of the package easy to understand.

  The present invention succeeded by obtaining a strong magnetic field perpendicular to the metal surface (Magnetic Jet Field).

  In general, an electric field perpendicular to the metal surface exists, and no electric field parallel to this exists on the metal surface.

  Similarly, near the metal surface, only a magnetic field parallel to the metal surface exists (a metal surface current and a metal surface magnetic current), and no magnetic field perpendicular to the metal surface exists.

  Effectively utilizing the metal surface current, the mirror effect causes the magnetic flux to double, that is, the voltage is doubled (6 dB), and the magnetic material is bent to create a perpendicular magnetic path, causing a magnetic field collision. Without succeeding in creating a magnetic field perpendicular (perpendicular) to the metal surface. In addition, it was possible to avoid the loss of the majority due to the collision of the magnetic fields and succeeded in creating a magnetic path in which most of the magnetic fields were used effectively.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

  Next, specific examples of the vertical magnetic field tag and the sensor system according to the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory diagram of a conventional coil-type tag and sensor. In a perspective view of a conventional general tag, the current I flowing through the coil C generates a current I that is the same size and flows on the opposite side due to the mirror effect of the metal surface M. The magnetic field H generated by this current is canceled by the magnetic field H generated by the current I generated by the mirror effect, and an induced voltage due to the magnetic field is not generated near the metal surface, so that the coil does not operate as a tag or a sensor.

FIG. 2 is an explanatory diagram of a conventional on-metal tag. The figure is intended to reduce the influence of the metal surface by laying a magnetic sheet under the coil in order to secure a passage through which the magnetic field of the tag and sensor coil in FIG. 1 escapes. _{When r} can be increased, a certain amount of equivalent cross-sectional area (proportional to thickness) can be increased even if the magnetic sheet is thin, so that the apparent thickness is increased, which is somewhat improved.

  FIG. 3 is an explanatory diagram of a sheet-like magnetic card. By applying a magnetic material sheet to a thin (0.76 mm thick) plastic such as a card and operating the card on a metal surface, the cross-sectional area S of the coil 2 is equal to the length L of one side of the card and the thickness t of the magnetic material 6. Since S is 0.76 mm, S (L × t) is very small. This is because a voltage that operates in the card can be obtained only when the relative permeability of the magnetic body 6 is nearly 100.

FIG. 4 is an explanatory diagram when the coil 2 is wound around the rectangular magnetic body 6. This is a case where the coil 2 is wound around the rectangular magnetic body 6 having a relatively large thickness, and as described in the IC tag system already applied, the cross-sectional area of the coil 2, that is, the magnetic body through which the magnetic field passes. The cross-sectional area S is S = x ₁ × y ₁ , and the magnetic flux is multiplied by the relative permeability, so that φαμ _r S, and when the magnetic permeability μ _r is about 100, the actual cross-sectional area S = x × y About 100 times the magnetic flux can be obtained.

  FIG. 5 is a diagram for explaining the mirror effect. Further, as can be seen from FIG. 5 due to the mirror effect due to the lower metal surface M, the image 6i is also added, which is the same as the case where the two coils 2 and the magnetic body 6 exist, and the voltage is doubled, and the power is quadrupled. 6 dB enhancement.

FIG. 6 is a diagram for explaining the contents of a non-contact type sensor coil already filed by the present applicant. For example, when there is a magnetic field H ₁ generated by the left tag and a magnetic field H ₂ generated by the right tag, the x-axis component of the magnetic field H ₁ of the left tag is Hx, and x of the magnetic field H ₂ of the right tag Since the component of the axis is -Hx, the x-axis component is canceled and the y-axis component Hy is added to become 2Hy. Accordingly, the vertical magnetic field component Hy is doubled. The Hy magnetic field and the upper coil C are coupled. However, the horizontal components Hx cancel each other and become zero. Since the magnetic field along the metal surface M is strong, the main magnetic field is the Hx component, so that even if a sharp magnetic flux distribution is obtained by canceling this, the magnetic field is wasted in part. Even if the magnetic flux is doubled by the folding angle image, a part of the effective magnetic field is lost.

  FIG. 7 shows a case where a magnetic material Co and an enhancement coil 2 'are added to facilitate passage of a magnetic field perpendicular to the center. In this case, part of the magnetic field is canceled out.

  The above-mentioned IC tag system has an increase in sensitivity of 6 dB due to the metal surface, but if anything, the increase in the magnetic field parallel to the metal surface (the magnetic field is continuous, and of course the vertical magnetic field is also doubled). Therefore, although it is desired to further increase the vertical magnetic field by the non-contact type sensor coil method, a part of the magnetic field has been canceled out.

  Therefore, since the present invention is a method of increasing the vertical magnetic field while obtaining the effect of the metal surface, this will be described with reference to the drawings.

8A, 8B, 8C, and 8D illustrate the shape of the magnetic core 6 of the tag or sensor according to the first embodiment of the present invention. 4 and 5, the core 6 is laterally linear, but is continuously bent in an L shape at the end, and the core 6 has a vertical component. Since the lower part of the coil 2 wound around the core 6 is almost in close contact with the metal surface M, the operation is almost the same as that of the core shown in FIGS. Therefore, the induced voltage and current generated in the coil 2 by being excited by the surface current i and the surface magnetic field (magnetic current) H are substantially the same as those in FIGS. However since the case of the magnetic mu _r is large, the excited magnetic field H becomes upward bent naturally upward magnetic path along the street easy magnetic path and exits the space at the top of the section.

  8A, 8B, 8C, and 8D show a case where only one end is bent upward, and FIG. 8A shows a case where the coil 2 is wound only in the horizontal portion of the core 6. FIG. FIG. 8B shows a case where the coil 2 is wound around both the vertical part and the horizontal part of the core 6. In the figure, the portion bent in an L shape is curved, but there is no difference in principle even when it is square. You may bend gradually like FIG.8 (c) and FIG.8 (d). There are only differences in ease of manufacture and some characteristics.

  8 (e) and 8 (f) show a case where the L-shaped structure of only one end of the example of FIGS. 8 (a) and 8 (b) is applied to both ends. FIGS. 8 (f) and 8 (h) also correspond to FIGS. 8 (c) and 8 (d) and show a case where magnetic paths extending upward are formed at both ends. In such a case, a strong horizontal or vertical magnetic field can be created even at a relatively remote location.

8 (a), (b), (c), and (d) can strengthen the coupling with the surface current and the surface magnetic current flowing along the metal surface M. Further, since the vertical magnetic field can be strengthened only at the left end, it can be used for a card or a reader / writer having a coil parallel to the metal surface M. FIG. 9 shows a configuration of a vertical magnetic field sensor system according to the present invention. . As in the case of FIG. 8 (a), an L-shaped vertical magnetic path (L-shaped core) is provided, and a metal plate (or metal foil) MB and MS are curved along the lower straight line portion along the magnetic path. It is arranged in the vertical part.

  This metal plate is also provided as a single unit from the time the tag is first formed, and has an effect of preventing changes in inductance and capacitance due to the approach of the metal body or metal surface. Therefore, a large change in characteristics is shown when there is a metal body and when there is no metal body. Another object is to prevent the coupling of the facing portions when facing each other as shown in FIG. The metal plate may be a metal foil or metal vapor deposition.

  In FIG. 9A, the coil 2 is wound only around the horizontal portion of the magnetic body 6, and the vertical portion only provides a magnetic path. The metal plate (metal foil) MS along the vertical portion suppresses the leakage magnetic field, but also generates some eddy current loss.

  FIG. 9B shows a case where the coil 2 is continuously wound around the horizontal portion and the vertical portion, and the metal plates MS and MB are also continuously along the L-shaped core.

  FIGS. 10A and 10B show a case where FIG. 9B is perspectively viewed. FIG. 10A shows a situation in which the coil 2 is continuously wound around the magnetic core 6 having the L-shaped vertical portion on the metal surface M, and the metal plates MS and MB are continuously lined on the outside. Show. Since the metal surface M is sufficiently large, the metal plate MB along the core is assimilated with the metal surface on the metal surface M, but the metal plate MS in the vertical portion is electrically connected to the metal surface. This also helps some mirror effect of the coil wound around the vertical core 6. This is remarkably shown in FIG. 10 (b).

  In the case of FIG. 10B, wide metal plates MSW and MBW are arranged along an L-shaped magnetic body wound with a coil. As described above, the metal plate MBW along the horizontal portion is assimilated to the metal surface and has the same potential, so when it is on the metal surface, it is assimilated with the metal surface and has no effect. This face is effective when there is no.

  Since the metal plate MSW is sufficiently wide even in the vertical portion of the magnetic body 6 around which the coil 2 is wound, the mirror effect is generated, and the magnetic flux generated in the vertical portion is also approximately doubled. This will be described later.

  FIG. 11 is an explanation of a metal plate (metal foil) along the magnetic body. FIG. 11A shows a case where the vertically aligned metal plate MS is sufficiently long in the longitudinal direction and is longer than the vertical portion of the magnetic body 6. In FIG. 11 (b), the metal surface to which the tag is attached is determined from the beginning. Therefore, the metal plate MB along the lower portion is unnecessary, and only the metal plate MS along the vertical is attached to the metal surface M by welding or the like. This is a case where the magnetic tag 6 is installed along the metal plate MS.

  FIG. 12 is a diagram for explaining the mirror effect. FIG. 10B shows a case where the width of the vertical metal plate MSW is sufficiently wide as shown in FIG. 10B and the mirror effect is also generated on the magnetic core 6 in the vertical portion around which the coil 2 is wound. A state in which four tags including an image are generated by the mirror effect and the mirror effect by the lower metal surface is shown. If the effect of four tags can be generated with one tag, a great effect can be obtained with the simplest excitation. For this purpose, it is obtained when the vertical metal plate MSW has a size that can be regarded as a large metal surface M.

  FIG. 13 shows the case of another embodiment. This figure shows a case where the length of the vertical metal plate MS is sufficiently long so that the length of the magnetic core 6 in the vertical portion can be sufficiently taken.

  FIG. 14 shows the current and magnetic field of the simplest metal surface current. This figure shows a case where the metal surface current i is substantially uniform and a substantially uniform magnetic field (magnetic current) H is generated. If it is possible to excite the tag as shown in FIG. 12 or FIG. 13 or receive the magnetic field generated from the tag in such a simple mode, it is easy to use. The same applies to the reader / writer side.

  FIG. 15 shows another main embodiment of the present invention.

When the tags and sensors shown in FIGS. 9B and 13 are faced in the vertical direction and the current direction of the coil 2 is reversed, and the magnetic fields H ₁ and H ₂ directed upward in the drawing are excited in the same polarity and the same phase. As shown in FIG. 15A, it is suitable for use in a general tag or card with the coil 2 facing each other. In this case, it can be well understood from the drawing that the upper circular coil (loop) Is can be well coupled. The strong vertical magnetic fields H ₁ and H ₂ extending vertically upward pass through the coil (loop) Is and generate an induced voltage therein.

  On the other hand, the magnetic field generated from the coil (loop) Is passes from the lower magnetic cross section of the tag through the magnetic body to the lower horizontal magnetic body, and is sent to the outside from the other cross section of the tag. It extends along M and then continues upwardly through the outside of the opposing coil (loop) Is to the magnetic field inside the coil (loop) Is.

FIG. 15B shows a case where FIG. 15A is viewed from the side, and it can be seen that two tags and sensors form images H _1i and H _2i on the metal surface M. According to this method, it can be seen that the magnetic field generated by the image of the metal surface M can be used as a vertical magnetic field without being lost due to a collision. In FIGS. 15A and 15B, the metal plate MS is sandwiched between the opposing magnetic bodies, but this metal plate MS may be omitted if some coupling is negligible.

  FIG. 16 illustrates the coupling between the coil and the tag sensor. In this figure, it is the most suitable excitation method for coupling a current generated from a loop coil or the like (substantially uniform in the φ direction) and a symmetric magnetic field (substantially uniform in the direction of ρ (radial direction)). Typically, one of the currents of the coil is taken and indicated by I, but the current (displacement current or conductive current) indicated by the circular current i is generated on the outside on the opposite of the left tag and the right tag. As can be seen from FIGS. 15 (a) and 15 (b), the magnetic field by the horizontal magnetic core is the direction of the circular radiation (direction of ρ), and the magnetic field by the vertical magnetic core is cylindrical coordinates. It is understood that this is the direction of the Z axis (the central axis of the circle).

  FIG. 17 is an explanatory diagram of a winding method. In the figure, there are four sets of systems in which currents in opposite directions are passed through winding rings (coils) wound around the left and right tags. There are 2 sets of serial system and 2 sets of parallel system. When the winding is clockwise, it is indicated by CW (Clock Wise), and when it is counterclockwise, it is indicated by ACW (Anti Clock Wise).

  FIG. 18 shows a case where three tags and sensors are shown as an example of a representative example of odd numbers. In the case of an odd number, the number increases to 1, 3, 5,..., And in the case of an even number, the number increases to 2, 4, 6, 8,.

  FIG. 19 shows a case where an IC or IC package 3 is placed on the magnetic core 6 around which the coil 2 is wound. The drawing shows an example in which the IC or IC package 3 and the substrate are attached to the vertical portion 6 in the example of FIG. 9A, but the coil 2 is shown in FIGS. 9B and 10A as a whole. May be an example of the magnetic body 6 in which is wound. Here, the IC, the IC package 3 and the substrate use the vertical space, but the horizontal space may be used.

  FIG. 20 shows an example of the two tags arranged symmetrically shown in FIGS. It is divided into a metal plate MB and a vertical metal plate (separator) MS, two tags are arranged, and an IC or IC package 3 is mounted on the substrate 5. The vertical metal plate (separator) MS can be omitted if the coupling between the magnetic bodies 6 of both magnetic bodies is weak and can be ignored. The coil is wound continuously from side to side.

  FIG. 21 shows the case where there is no R at the corner of the L-shaped core. In the example in which the vertical metal plate MS is not bent and is sandwiched between the tags on both sides, <the substrate 5, the IC, and the IC package 3 are arranged on the horizontal core. Small parts 4 such as capacitors are similarly placed on the substrate. When an IC package is used, the IC and the coil are tuned, and the IC package is used, the substrate may not be required.

  FIG. 22 shows an active tag. In FIG. 22A, a supercapacitor large-capacity capacitor SC and a secondary battery SB are further accommodated on one side or both sides in order to make an active tag.

  Thereby, since a battery can be built in, a stronger signal can be generated and communication with a distant place becomes possible. In addition, the S / N is improved and it can be used even in a noisy place. The IC or IC package 3 is placed on the super capacitor (large capacity capacitor) SC or the secondary battery SB, but is placed on the substrate 5 above the coil as shown in FIG. A capacitor (large capacity capacitor) SC or a secondary battery SB may be arranged. 20, 21, 22, etc. The coils are individually wound around the magnetic body in the vertical portion, but since the current in the reverse direction flows in the portion where the coil is close to the metal plate, this portion is unnecessary, so the coil is wound integrally. You can also.

  In FIG. 22B, a sensor or an interface with an external sensor is provided in the tag space, the information obtained here is recorded in the IC 3, and later communicated with an external reader / writer R / W. Thus, the information obtained by the sensor can be read. The coil 2 is naturally wound, but is omitted from the figure.

  FIG. 23 shows an example in which the lower metal plate MB is made slightly wider. The case where it is easy to put on a metal surface to be mounted later, and is also housed in a box for packaging and widened so as to be easily sealed is shown. The vertical metal plate (separator) MS is also made slightly wider so that the fitting with the box is improved. The coil is also omitted in the figure.

  FIG. 24 shows a package of tags and sensors. In the figure, a package (box (lid)) is made of a material that does not easily affect the internal tag or sensor, such as plastic or ceramic, and this is covered with the tag or sensor as shown in FIG. It is intended to protect or make it look like a product. A letter or number is written on the top to display the product, or a marker indicating that it is on the top. Since the side plate 7 is not a magnetic path, it can be made of metal. This also causes some mirror effect.

  Also, as shown in FIG. 24 (b), in order to make it easy to attach a tag or sensor package to a metal surface or metal body, an attachment ear F is provided so that the tag or sensor package can be fixed not only simply but also more firmly. ing. A hole h is made in the mounting ear F so that it can be fastened with screws or rivets. It can also be fastened by spot or welding.

  FIG. 25 and FIG. 26 are examples in the case of a single tag or sensor of the present invention. FIG. 25 shows a case where the IC 3 and the substrate 5 are attached to the moving body as described above with reference to FIGS. 9, 10, 11, 12, 13, 19 and the like because the moving body is sufficiently movable. The metal plates MB and MS along the coil and the core are wide. The side plate 7 may be a metal plate. This effect can be increased by connecting to the metal plates MB and MS.

  FIG. 26 shows an example in which a super capacitor SC, a secondary battery SB, and a sensor (sensor) are further added. FIG. 27 shows a case where these tags and tags are covered with a box (lid) 1 made of a material through which a magnetic field such as plastic or ceramic passes as described above to form a package P.

  FIG. 27 shows an example of a single package. FIG. 27 (a) is a cover of FIG. 25, FIG. 26, etc. FIG. 27 (b) is a case where a mounting ear F is provided to facilitate mounting of the tag and sensor, and a hole h is formed in this. Indicates.

  FIG. 28 shows an application example of the sensor. This figure shows a case where the vertical magnetic field sensor of the present invention is attached to the reader / writer R / W and the information on the tag T is read by a personal computer. The opponent's tag may be of the same type or may be a card.

  29 and 30 show application examples. In FIG. 29, a strong vertical magnetic field can be generated in spite of the presence of the metal surface M when attached to a bending machine or other equipment, and information can be exchanged with the opposing card Cd or mobile phone MP.

  FIG. 30 shows that a vertical magnetic field sensor of the present invention can be used in a box surrounded by metal such as a switch box to generate a strong vertical (here, horizontal) magnetic field and communicate with an external card or tag. .

  As described above, it has been thought that a magnetic field perpendicular to the metal surface cannot be generated in the vicinity of the metal surface, but the mirror effect of the metal surface is used in reverse by using the technique of the present invention. The voltage is doubled (4 times the power), and this magnetic field is bent vertically to increase the sensitivity further by the mirror effect (approximately 4 times). By synthesizing, a strong vertical magnetic field (Jet Field) could be created without causing unnecessary collision of magnetic fields.

It is explanatory drawing of the conventional coil-type tag and sensor. It is explanatory drawing of the conventional on metal tag. It is explanatory drawing of a sheet-like magnetic body card. It is explanatory drawing at the time of winding a coil around a square-shaped magnetic body. It is a figure explaining a mirror effect. It is a figure explaining the content of the non-contact-type sensor coil which the present applicant has already applied for. It is a figure which shows the case where the magnetic body and reinforcement coil for making it easy to pass a magnetic field perpendicular | vertical to a center part are added. It is a figure explaining the shape of the magnetic core of the tag or sensor by 1st embodiment of this invention. It is a figure which shows the form of the perpendicular magnetic field sensor system concerning this invention. It is a figure which shows the case where FIG.9 (b) is perspectiveed. It is a figure explaining the metal plate (metal foil) along a magnetic body. It is a figure explaining a mirror effect. It is a figure which shows the case of another Example. It is a figure which shows the electric current and magnetic field of the simplest metal surface current. It is a figure which shows another main Example of this invention. It is a figure explaining the coupling | bonding of a coil and a tag sensor. It is explanatory drawing about the method of winding. It is a figure which shows the case where three tags and a sensor are shown as an example in the representative example of an odd number. It is a figure which shows the case where IC and IC package are mounted on the magnetic body core which wound the coil. It is a figure which shows the example of the tag arrange | positioned symmetrically shown in FIG. It is a figure which shows the case where there is no R at the corner of the L-shaped core. It is a figure which shows an active tag. It is a figure which shows the example in case the lower metal plate is made a little wider. It is a figure which shows the package of a tag or a sensor. It is a figure which shows the example in the case of the single-piece tag and sensor of this invention. It is a figure which shows the example in the case of the single-piece tag and sensor of this invention. It is a figure which shows the example in the case of a single package. It is a figure which shows the application example of a sensor. It is a figure which shows an application example. It is a figure which shows an application example.

Explanation of symbols

1 Box for housing IC tag and sensor 2 Wire ring (coil)
3 IC (IC package)
4 Components such as capacitors 5 Substrate 6 Core (magnetic material)
7 Side plate ACW When winding is counterclockwise CW When winding is clockwise Cd Card F Mounting ear H Magnetic field H ₁ Left magnetic field H ₂ Right magnetic field H _1i Left tag image H _2i Right tag image h Hole I Coil current Is Loop current i Metal surface current M Metal surface MP Mobile phone MS Drawing vertical (perpendicular to metal surface) Metal plate (metal foil)
MSW Wide vertical metal plate MB Drawing horizontal (direction along the metal surface) Metal plate (metal foil)
MBW Wide metal plate P Package box PC Computer R / W Reader / writer SB Secondary battery SC Super capacitor

Claims (13)

  In a vertical magnetic field sensor system in a response system including an IC for generating a signal, a coil wound around a magnetic body for non-contact coupling at input and output is provided, and the axis of the magnetic body around which the coil is wound is a metal A perpendicular magnetic field sensor system comprising a portion that is substantially continuous with a portion parallel to the surface and substantially perpendicular or perpendicular to the metal surface.   2. The vertical magnetic field sensor system according to claim 1, wherein a coil is wound around the core of the vertical portion along the magnetic core.   3. The vertical magnetic field sensor system according to claim 1, wherein a metal plate is placed alongside a coil wound around a magnetic material.   3. The vertical magnetic field sensor system according to claim 1, wherein a metal plate is also placed along a portion of the magnetic material that stands vertically.   3. The vertical magnetic field sensor system according to claim 1, wherein the magnetic field sensor system is arranged in an even number or an odd number so that the vertically rising magnetic body sides are aligned.   3. The vertical magnetic field sensor system according to claim 1, wherein various sensors are recorded on the IC.   3. The vertical magnetic field sensor system according to claim 1, wherein the sensor is attached to a reader / writer.   6. The vertical magnetic field sensor system according to claim 1, wherein when two or more sensors are combined, they are fixed through a metal plate.   3. The vertical magnetic field sensor system according to claim 1, wherein a supercapacitor, a large-capacity capacitor, and a battery are mounted to form an active tag.   3. The vertical magnetic field sensor system according to claim 1, wherein the package is made of plastic or ceramic for protecting the tag or the sensor.   11. The vertical magnetic field sensor system according to claim 1, wherein when the tag or sensor is packaged, a metal plate attached to the tag or sensor is used for a bottom portion of the package. Vertical magnetic field sensor system.   11. The vertical magnetic field sensor system according to claim 1, wherein when the tag or sensor is attached to a metal body or a metal surface, a mounting portion is provided on the tag or sensor. Sensor system.   11. The vertical magnetic field sensor system according to claim 1, wherein characters, numbers, or marks are added to make the top and bottom of the package easy to understand.

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