JP2714563B2 - Identification sign - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention makes it possible to identify an object to be identified by combining at least two resonance circuits having different resonance frequencies and detecting the resonance frequency of the resonance circuit. The present invention relates to an identification mark to be identified and a method of identifying an identification target.

[Prior Art] Conventionally, various types of wheeling means such as railroads, automobiles, ships, and airplanes have been used to transport loads. In particular, recently, inexpensive transportation methods using small cars or the like, which are so-called courier services, are often used for lightweight limited weight items.
In this method, a trader collects and distributes packages and delivers the packages to a desired destination in a short time. This method is characterized by the fact that the shipping procedure is simple and the delivery is made in a short time.

In order to select and specify a delivery destination, a sender, a destination (delivery destination), and the like are written in a label attached to a package, and the delivery destination is visually checked, selected, and specified.

More recently, destinations are coded and used for sorting, etc., and a bar code system is carried, and a bar code for identification of the sender, destination (delivery destination), etc. is printed on a label attached to the package. And other methods are used.

[Problems to be Solved by the Invention] However, in this type of transportation method, accidents that are mis-distributed or lost due to erroneous identification of the package occur frequently, and the investigation and compensation costs for that are large. For this reason, it is an important issue that must be resolved promptly for contractors.

As a solution, it is conceivable to enhance the visual check of luggage. However, the enhancement of visual confirmation of luggage causes a cost increase, and causes problems such as difficulty in delivery in a short time, and human intervention is inevitable, and there is a limit to improvement in reliability.

In the case of printing a bar code system for identification on the label attached to the package, the confirmation method is optical, so that the label attached to the package can be read optically. There is a problem that it cannot be confirmed unless it is done.

That is, the barcode printing surface must face the readable surface of the reading device, and cannot be read at all when the other surface, particularly the printing surface is located on the bottom surface of the package, and is erroneously sent. It may cause.

Further, the barcode reading depth is limited, and a reading error may occur when there is a large unevenness on the barcode affixing surface of each package. For this reason, the size of the luggage to be attached cannot be largely restricted.

[Means for Solving the Problems] The present invention has been made for the purpose of solving the above problems, and has the following configuration as one means for solving the above problems.

That is, an identification mark added to an object to be identified, a capacitor electrode pattern having a desired resonance frequency on one surface of an insulating thin film made of a conductive material, and a dielectric element electrically connected to the capacitor electrode pattern. And a capacitor electrode pattern having a desired resonance frequency paired with the capacitor electrode pattern on the one surface by using a conductive material at a position facing the capacitor electrode pattern on the other surface of the insulating thin film. A resonance circuit sheet is provided in which a plurality of sets of resonance circuits electrically connecting the patterns on both surfaces of a set of formed resonance circuit portions are formed so as to have different resonance frequencies.

And, for example, the conductive pattern of each of the resonance circuit forming portions on the one surface of the resonance circuit sheet is separated by a common conductive pattern not connected to the conductive pattern. .

[Operation] In the above configuration, an identification marker having a resonance circuit of a desired resonance frequency can be easily and accurately obtained with a simple configuration,
Versatile objects can be identified.

In addition, the identification mark is resistant to deformation and can be formed to be thin, can be produced at low cost, and is used for a wide range of applications.

Furthermore, only a predetermined resonance circuit can be easily selected, and an identification marker having almost no limitation on the identification target can be obtained.

Further, since the resonance circuits are separated by the conductive pattern, the influence of adjacent resonance circuits can be reduced.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the drawings.

In this embodiment, a plurality of resonance circuits are mounted on the identification target,
The resonance frequency of the resonance circuit is detected, and the identification target is identified by a combination of the detected resonance frequencies.

This resonance circuit is constituted by, for example, an LC resonance circuit in which at least one inductor (dielectric element) and at least one capacitor (capacitor circuit element) are integrally formed.

1 is a plan view of a resonance circuit sheet on which a resonance circuit used in the present embodiment is formed, FIG. 2 is a dielectric circuit pattern of the resonance circuit shown in FIG. 1, and FIG. 3 is a diagram of the resonance circuit shown in FIG. It is a figure showing a capacitor circuit pattern.

In the figure, reference numeral 1 denotes an insulating synthetic resin film which is an insulating substrate. A dielectric circuit pattern 4 in a resonance circuit is formed on one surface of the insulating synthetic resin film 1 and a capacitor circuit pattern 9 is formed on the other surface. ing.

The dielectric circuit pattern 4 and the capacitor circuit pattern 9 are formed of conductive metal foil.

In the dielectric circuit pattern 4, reference numeral 5 denotes a conductive terminal part of the dielectric circuit pattern part, and reference numeral 6 denotes a capacitor part of the dielectric circuit pattern part.

In the capacitor circuit pattern 9, reference numeral 10 denotes a capacitor portion of the capacitor circuit pattern portion, and reference numeral 11 denotes a conduction terminal portion of the capacitor circuit pattern portion.

As shown in the figure, the capacitor portion 6 of the dielectric circuit pattern and the capacitor portion 10 of the capacitor circuit pattern 9 are provided at opposing positions (diametrically opposite positions) with the insulating synthetic resin film 1 interposed therebetween. And form a capacitor.

The choice of the insulating synthetic resin film 1 and the conductive metal foil is as follows. The insulating synthetic resin film 1 has a relatively small dielectric loss tangent value of the physical characteristics, and corresponds to the frequency of the designed circuit. It is desirable to be made of a synthetic resin such as polyethylene, polypropylene, polystyrene, polyester or the like that can maintain the tolerance.

On the other hand, if the metal foil has good conductivity, gold,
Metals such as silver, copper, and aluminum, or various alloys can be used.

However, in terms of raw material costs, polyethylene resin and aluminum foil are cheaper than other materials. Aluminum foil is particularly preferred in terms of physical properties, especially adhesion, because it is easy to adhere to polyethylene resin. With respect to the flexibility of the conductive metal foil, aluminum foil is particularly excellent.

Therefore, in this embodiment, the insulating synthetic resin film 1 is used.
Polyethylene resin, and an aluminum foil as a conductive metal foil. Actually, Al (99.3%), Si (0.1%), Fe (0.3%), Cu
(0.05%) and the like, an aluminum foil corresponding to the AA rating of 1235 and a polyethylene resin as the insulating synthetic resin film 1 are used.

The resonance circuit sheet of the present embodiment having the above configuration is manufactured by the following steps.

First, as shown in the cross-sectional view of FIG. 4, a flexible sheet on which an insulating synthetic resin film 1 and conductive metal foils 2 and 3 formed on both surfaces of the film 1 are formed.

The thickness range of the insulating synthetic resin film 1 is determined by the range of the resonance frequency of the resonance circuit, the performance of the resonance tag, and the method of bonding with the conductive metal foil for forming the conductive region functioning as the resonance circuit. It is determined. As the thickness, a thickness of 5 μm (μ) to 30 μm (μ) is used, and ± 5% is recognized as a thickness tolerance.

On the other hand, among the conductive metal foils coated on both sides of the insulating synthetic resin film 1, the thickness of the conductive metal foil used for one of the dielectric pattern circuits is set to a large value in order to reduce the electric resistance. (50 microns or more and 100 microns or less) 2 is used.

The conductive metal foil used for the other capacitor pattern circuit is thin because it is used only as a pole plate and a terminal for conduction of the capacitor and the etching processing cost for circuit creation is reduced as much as possible. A foil (5 microns or more and 15 microns or less) 3 is used.

In this embodiment, one has a thickness of 50 microns (μ)
On the other hand, an aluminum foil having a thickness of 12 microns (μ) and corresponding to AA standard 1235 is used.

Subsequently, the surface of the conductive metal foils 2 and 3 coated on both sides of the insulating synthetic resin film 1 using a printing ink having an etching resistance (in this embodiment, a polyester-based etching resistance ink) is used. A resonance circuit pattern having a specific resonance frequency of the dielectric pattern circuit 4 and the capacitor circuit pattern 9 as shown in FIGS. 2 and 3 is printed by the gravure method.

This printing pattern is a pattern determined by the resonance frequency. At present, the resonance frequency of this resonance circuit is required to have a resonance frequency accuracy of ± 5% in terms of the performance of the resonance frequency detecting device, and in order to achieve a desired accuracy. Has a great influence on the printing accuracy. Further, a resonance circuit is required to have higher sensing performance. To obtain such a resonance circuit, it is necessary to select an optimum circuit conductor width, a distance between lines, and the number of coils. For this reason, FIG. 5 shows an example of the number of coils, the width of the rotating conductor, and the distance between the conductors of the dielectric circuit pattern portion of the resonance circuit of each resonance frequency employed in the design of the dielectric circuit in the present embodiment.

In the capacitor circuit pattern shown in FIG. 3, since the conductive metal foil 3 having a small thickness is used, the coil (conductor) in the dielectric circuit exerts a shear stress on the material during processing after printing. There is also a risk that the capacitor circuit 9 will be disconnected. For this reason, it is necessary to prevent cutting, depending on the thickness of the dielectric metal foil used and the design of the circuit.

In consideration of this point, islands of a certain size are printed on both sides of the conductor in the capacitor circuit 9 at the portion intersecting the coil in the dielectric circuit pattern 4 to leave a metal foil serving as reinforcement. Good.

FIG. 6 shows details of the capacitor circuit pattern on which this island is printed. 12 in FIG. 6 is this island.

Next, after printing the pattern with the printing ink having etching resistance in this manner, an etching process is performed, and the metal foil portions other than the printed pattern portions on both surfaces of the conductive metal foils 2 and 3 are formed using a known acidic or alkaline chemical solution. To form the dielectric circuit pattern and the capacitor circuit pattern shown in FIG. 2 or FIG.

The chemical used in this etching step varies depending on the type of the conductive metal foil to be removed.In the case of the aluminum foil of the present embodiment, the chemical is treated with a ferric chloride solution, the amount of the metal foil dissolved, The temperature and concentration of the etching solution are appropriately controlled and used according to the contents of the pattern, the etching speed, and the like. Further, in the case of the spray system, the spray system is used while appropriately controlling the liquid pressure at the tip of the solution injection nozzle.

The thinning due to the etching of the dielectric circuit pattern conductor
Since this influences the design resonance frequency, the “accuracy of the etching” of how small this line thinning can be becomes important. This line thinning is desirably 100 microns or less. FIG. 7 shows a cross-sectional view of the flexible sheet after the etching process.

In the processing after the etching process, the dielectric circuit pattern and the capacitor circuit pattern are electrically connected to each other in order to form a resonance circuit, and pacing is performed.

This adjustment process (conduction work) is performed by mechanically pressing the metal foil of the portion of the resonance circuit portion where the conduction terminal portions 5 and 11 are provided using a cold tool having a file-shaped tip, or by applying ultrasonic waves. The welding is performed by making both terminal portions conductive and electrically connected. As a result, the resonance circuit section is in an operating state, and resonates at a predetermined frequency.

FIG. 8 is a cross-sectional view of the flexible sheet after the completion of the electrical connection in which the conductive portions 5 and 11 are brought into a conductive state in this way.

Subsequently, as shown in a sectional view in FIG. 9, an acrylic resin adhesive material 13 is used for either the dielectric circuit pattern surface or the capacitor circuit pattern surface, for example, a high-quality paper of 55 g per square meter or a similar material ( 14), and a release paper 16 having a weight of 60 g per square meter having a rubber-based adhesive (pressure-sensitive adhesive) 15 is attached to the other. FIG. 9 shows a cross-sectional view of this bonded state.

The multi-layer laminated material to which the paper and the release paper are bonded is then removed by a flat-pressure die cutter, leaving only the release paper and removing unnecessary portions.

Thus, a resonance circuit sheet having a desired resonance frequency is completed.

Similarly, for example, a resonance circuit sheet having each resonance frequency shown in FIG. 5 is manufactured.

Then, at the time of use, a desired resonance circuit is selected from the resonance circuits manufactured in this manner, and is attached to an object.

Thereafter, the target object can be specified by a combination of the resonance circuit resonance frequencies of the target object to which the desired resonance circuit is attached.

In addition, instead of selecting a desired resonance circuit from among the resonance circuits manufactured separately as described above and pasting the desired resonance circuit to a desired combination of resonance frequencies, a plurality of resonance frequencies each having a unique resonance frequency are determined in advance. The resonance circuit pattern may be formed on an insulating synthetic resin film, and electrically connected between the conductive terminals of the desired resonance circuit pattern during use.

Further, a plurality of resonance circuit patterns having respective unique resonance frequencies are electrically connected in advance to each other, and unnecessary resonance circuit patterns are cut off by cutting unnecessary resonance circuit patterns. May be obtained.

FIG. 10 shows a layout example of a resonance circuit in the case where a plurality of resonance circuits (for example, 14) each having a unique resonance frequency are integrally formed in advance. Here, f _{1 to} f ₁₄ are resonance circuits at the respective resonance frequencies shown in FIG.

In this embodiment, the dielectric circuit turns shown in FIG. 11 are formed on the surface of the conductive metal foil 2 in order to form 14 resonance circuit patterns having a unique resonance frequency in one sheet. Next, the capacitor circuit pattern shown in FIG. 12 is printed.

Each natural resonance frequency in each circuit pattern is f ₁ = 10
MHz, f ₂ = 13 MHz, f ₃ = 16 MHz, f ₄ = 20 MHz, f ₅ = 25 MHz, f ₆ = 30
MHz, f ₇ = 37 MHz, f ₈ = 45 MHz, f ₉ = 55 MHz, f ₁₀ = 66 MHz, f ₁₁ =
_{80MHz, f 12 = 98MHz, f} 13 = 120MHz, arranged in such a way that f ₁₄ = 150 MHz.

Each circuit turn has its own unique resonance frequency,
They are all different from each other. Moreover, each of them must be designed so as to be completely independent of the other resonance circuit sections and not to affect the performance of adjacent resonance circuit sections.

When copper or an aluminum foil as in the present embodiment is used as the conductive metal foil, there is a possibility that interaction between adjacent resonance circuit portions may occur. In this embodiment, in order to eliminate such a fear, a separate section 8 for separating each resonance circuit section is provided. As described above, it is one print pattern design to leave a separate pattern around the resonance circuit portion and keep it in a shielded state.

The plurality of n resonance circuits present in one sheet manufactured as described above all have different resonance frequencies, and they have a single resonance action, and of course, have a plurality of n resonance frequencies. By combining an arbitrary number, a known resonance frequency detecting device uses mathematical notation to identify “2 ⁿ −1” ways, that is, for example, if there are 14 different resonance frequencies as in the present embodiment, there are 16,383 kinds of identification. Becomes possible. And
In the present embodiment, in order to further improve the accuracy of identification sensing, the arrangement direction and the optimal arrangement position of a plurality of n different unique resonance frequency circuit patterns existing in the sheet are selected and determined. .

In this embodiment, the best result was obtained when the arrangement position shown in FIG. 13 was used.

In the above description, an example in which one capacitor pattern is formed in the capacitor circuit pattern 9 has been described. However, the present invention is not limited to the above example.
A plurality of capacitor patterns, for example, two or more capacitor patterns may be formed in parallel, and a capacitor value may be changed by a combination of conduction patterns to select a resonance frequency.

With this configuration, it is possible to select and form a resonance circuit having a larger number of resonance frequencies.

Next, a detection device and a detection method of the resonance frequency of the resonance circuit formed as described above will be described.

The above-mentioned resonance circuit consists of a capacitor and a coil (inductor)
Form a connected LC resonance circuit. For this reason, the resonance frequency detecting device scans a predetermined range of frequencies (in the present embodiment, the resonance frequency is 10 MHz to 150 MHz, for example, the frequency may be 10 MHz to 160 MHz covering this range). What is necessary is just to radiate the object to the target frequency and receive and analyze the reflected echo wave.

When a frequency f is given to the resonance circuit, if this frequency is not the resonance frequency, no operation is performed and the received wave does not change.

On the other hand, when the frequency f is the resonance frequency of the resonance circuit, a radio wave having a frequency of f 'is generated. The relationship between f and f 'at this time is (f = f').

Therefore, the phase of the reception frequency of the resonance frequency detection device changes by Δ in response to the echo wave from the resonance circuit.

The resonance frequency detecting device may sequentially turn on / off the resonance frequency of the resonance circuit at regular intervals, and detect whether an echo wave is detected at the oscillated frequency. If an echo wave is detected, “there is a resonance circuit” at the resonance frequency,
If there is no echo wave, the resonance frequency may be set to "no resonance circuit".

FIG. 14 shows the detection timing of the resonance frequency detection circuit. In the figure, when there is an amplified output, "there is a resonance circuit"
The case where there is no output is "no resonance circuit".

When detecting the resonance frequency, one resonance circuit is used as a reference resonance circuit. When the resonance frequency of the reference resonance circuit is detected, it is determined that the target has reached (selection). An object can be specified by adding a frequency resonance circuit.

When an arbitrary promotion circuit of the 14 types of resonance circuits is combined, (2 ⁿ -1) types of identification are possible.

In this case, if the reference resonance circuit is omitted, 2 ⁿ types of identification can be performed.

In the case where higher reliability is required, it is possible to confirm whether or not all the detected resonance frequencies have been correctly detected by allocating one resonance circuit to parity bits.

As described above, according to the present embodiment, a resonance circuit having a plurality of resonance frequencies is formed on an object, and an echo wave from the resonance circuit is detected. The resonance frequency can be detected regardless of the orientation of the object and the shape of the object attached to the object as long as the object is attached to the object.

 Therefore, the following effects can be achieved.

(1) Elimination of erroneous delivery of route track flights becomes possible.

(2) Prevent erroneous delivery and loss of home delivery by applying it to sorting of home delivery luggage.

(3) Simplification of medical records by applying to hospital medical records.

(4) Elimination of troublesome operation by using as a non-contact sensor for attending and leaving the company.

(5) Elimination of troublesome operations by applying to customer management in stores, financial institutions, parking lots, and the like.

(6) Application to VIP management by security companies.

(7) It can be widely applied to merchandise management, anti-theft (prevention of shoplifting), etc. by utilizing the selection and detection capabilities.

(8) Application to boarding passenger management of aircraft, etc.

[Effects of the Invention] As described above, according to the present invention, a resonance circuit having a desired resonance frequency can be formed and added to an object to be sorted, and the resonance frequency of the resonance circuit can be detected to attach the resonance circuit. It is not limited to the position or the shape of the sorting object, and the sorting can be surely specified.

Further, an identification marker having a resonance circuit having a desired resonance frequency can be easily and accurately obtained with a simple configuration, and a versatile object can be identified.

Moreover, the identification mark can be formed to be resistant to deformation and thin, can be produced at low cost, and can be used for a wide range of applications.

Furthermore, a desired resonance circuit can be easily selected and used, and an identification marker having almost no limitation on the identification target can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of one embodiment according to the present invention, FIG. 2 is a diagram showing an example of a dielectric pattern of this embodiment, FIG. 3 is a diagram showing a capacitor circuit pattern of this embodiment, and FIG. FIG. 5 is a view showing a flexible sheet to which a conductive thin film of the present embodiment is fixed, FIG. 5 is a view showing the number of coils, a circuit conductor width, and a distance between conductors of a dielectric circuit portion of the present embodiment; FIG. 7 is a view showing details of a capacitor circuit pattern in which an island portion is formed according to another embodiment of the present invention. FIG. 7 is a view showing a cross-sectional view of a flexible sheet after an etching process of this embodiment. FIG. 9 is a cross-sectional view of the flexible sheet after the resonance circuit is tuned according to the present embodiment. FIG. 9 is a cross-sectional view of the flexible sheet to which release paper or the like is attached after the electrical connection is completed according to the present embodiment. FIG. 10 is a diagram showing each resonance circuit pattern employed in the design of the dielectric circuit in the present embodiment. FIG. 11 is a diagram showing the present embodiment. FIG. 12 is a diagram showing a dielectric circuit pattern, FIG. 12 is a diagram showing a capacitor circuit pattern of the present embodiment, and FIG. 13 is an example in which the arrangement direction and the optimal arrangement position of the resonance frequency circuit pattern of the embodiment are selected and determined. FIG. 14 is a timing chart showing the detection timing of the device for selecting the resonance frequency of the resonance circuit of the present embodiment. In the drawing, 1 ... insulating synthetic resin film, 2,3 ... conductive metal foil, 4 ... dielectric circuit pattern, 5,11 ... conduction terminal section, 6,10 ... capacitor section, 7 ... Etching-resistant ink, 8: Separate part, 9: Capacitor circuit pattern, 12: Island part, 13, 15: Adhesive, 14: Fine paper, 16
.... Release paper.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-53-149097 (JP, A) JP-A-63-188167 (JP, U) JP-A-59-126061 (JP, U)

Claims (2)

(57) [Claims] An identification mark to be added to an object to be identified, comprising: a capacitor electrode pattern on one surface of an insulating thin film made of a conductive material having a desired resonance frequency; and an electrical connection with the capacitor electrode pattern. A capacitor that forms a dielectric element pattern and has a desired resonance frequency paired with the capacitor electrode pattern on the one surface by using a conductive material at a position facing the capacitor electrode pattern on the other surface of the insulating thin film. A plurality of sets of resonance circuits are formed such that the patterns on both surfaces of a set of resonance circuit forming portions formed by forming an electrode pattern are electrically connected to each other so as to have different resonance frequencies, and the respective resonance circuits are formed to be separable. An identification marker characterized in that only a resonance circuit having a predetermined resonance frequency can be separated and used in combination. 2. A method according to claim 1, wherein the conductive patterns on the one surface of the resonance circuit sheet are separated by a common conductive pattern not connected to the conductive pattern. The identification marker according to claim 1, wherein