JP6218593B2 - Wireless tag - Google Patents

Description

  The present invention relates to a wireless tag in consideration of burnout.

  The wireless tag is also called an RFID (Radio Frequency IDentification) tag, a wireless IC (Integrated Circuit) tag, an electronic tag, or the like. The wireless tag can perform wireless data communication without contact with a wireless reader (or wireless reader / writer). By attaching the wireless tag to the management object, the wireless reader can read the information of the wireless tag and manage the management object without contact. In addition, by mounting a sensor on the wireless tag, it is possible to perform measurement related to the management target, measurement of the surrounding environment of the wireless tag, and the like. Patent Document 1 describes a wireless tag using a paper base material, Patent Document 2 describes a wireless tag using a resin film base material, and Patent Document 3 describes gas detection. A wireless tag having a sensor for use is described.

  For example, in a gun like a cannon, a charge in which a gunpowder such as a propellant or an igniter is enclosed in a burnout container is used. During shell shooting, the charge is loaded into the chamber of the gun barrel, and a bullet is placed on it. When this explosive is ignited, it causes explosive combustion, and a bullet is fired by the combustion gas pressure. A burnout container used for such charge is described in Patent Document 4, for example.

JP 2008-305179 A JP 2007-143003 A JP 2012-168193 A JP2013-068365A

  Currently, charge (powder) information (manufacturing lot number, manufacturing location, date of manufacture, etc.) is managed by the operator visually checking the letters printed on the packing box and the burnout container of the charge. It is done by checking one. This work is a work that requires more time and manpower as the number of charges increases. Also, since the temperature of the gunpowder affects the ballistic performance of the bullet, there are cases where it is desired to accurately grasp the temperature of the gunpowder before shooting. When measuring the temperature of explosives, a hole is made in a burnt-out container with a sharp object such as a thousand pieces, and a rod-shaped thermometer is inserted. This method needs to be done with great care so as not to ignite the explosive, so it takes more time and manpower, and it is difficult to measure the temperature of all explosives in a limited time for shooting preparation. is there.

  In order to obtain information on the charge in a short time, it is conceivable to attach a wireless tag to the charge. In addition, it is conceivable to equip the wireless tag with a sensor as needed to measure the temperature of the explosive inside the charge.

  However, it is important that the charge produces little residue after combustion. Further, it is important that the size of the charge is fine even if a slight amount of residue is generated. This is because, if a large amount or a large residue is generated, it may cause a failure to load the next ammunition due to biting, or an unexpected firing of the next ammunition due to the heat of the residue. Conventional wireless tags such as those described in Patent Documents 1 to 3 are not considered for burnout, so it is highly possible that most of the components remain as residues in the gun. There is a problem that it cannot be used.

  In addition, explosive combustion is caused by various pyrotechnics such as explosives or explosive weapon ammunition, automobile airbags, blasting explosives, fireworks such as launch fireworks and in-process fireworks, and flying. Examples include propellants for the body (rocket). Against these problems, there is a problem that conventional wireless tags cannot be used when the residue of the wireless tags after the explosion becomes a problem. Further, even a wireless tag attached to an object that is burned, such as a container that is incinerated at an incineration disposal site or the like, is desired to have a small amount of residue after combustion.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a wireless tag that is excellent in burnout and has little residue after combustion.

The wireless tag according to claim 1, which has been made to achieve the above object, includes a base material, an antenna provided on the base material, a base plate mounted on the base material, and the antenna. A wireless tag comprising a wireless tag circuit electrically connected, wherein the base material is formed by including a self-reactive substance burnout material containing oxygen in the molecule. To do.

  The wireless tag described in claim 2 is the one described in claim 1, wherein the burnout material includes a nitrocellulose derivative and / or a nitroguanidine derivative.

  According to a third aspect of the present invention, there is provided the wireless tag according to the first or second aspect, wherein the antenna is formed in a film-like conductive pattern on the base material with a conductive organic material. And

  According to a fourth aspect of the present invention, there is provided the wireless tag according to the first or second aspect, wherein the antenna is formed by a conductive inorganic material in a film-like conductive pattern on the base material. The film thickness of the pattern is 50 μm at the maximum.

  According to a fifth aspect of the present invention, the wireless tag according to any one of the first to fourth aspects is provided, wherein the antenna has a notch formed on an outer periphery and / or a punched hole. It is characterized by that.

  A wireless tag according to a sixth aspect is the one according to any one of the first to fifth aspects, wherein a component of the circuit for the wireless tag is a conductive adhesive, an anisotropic conductive adhesive, or a low temperature. It is mounted on the base material by solder.

  The wireless tag described in claim 7 is the one according to any one of claims 1 to 6, wherein at least a part of the components of the wireless tag circuit is formed of an organic material. And

  The wireless tag according to claim 8 is the one according to any one of claims 1 to 7, further comprising a cover that covers at least a part of the base material, wherein the cover includes a burnout material. It is formed by.

  The wireless tag according to claim 9 is the one according to any one of claims 1 to 8, wherein the wireless tag circuit includes a power supply unit for operating as a passive wireless tag. Features.

  The wireless tag according to claim 10 is the one according to any one of claims 1 to 9, wherein the wireless tag circuit includes a sensor for measuring a measurement target, and the measurement value of the sensor is obtained. Wireless transmission is possible from the antenna.

  The wireless tag according to claim 11 is the one according to any one of claims 1 to 10, wherein the wireless tag circuit is capable of wirelessly transmitting preset information from the antenna. And

  According to the wireless tag of the present invention, since the base material is formed to include a burnout material, the base material that occupies most of the wireless tag is burned out. It can be set as a wireless tag with few.

  In the case where the burnout material contains a nitrocellulose derivative and / or a nitroguanidine derivative, it is burnt out in a short time and does not generate a residue, so that a wireless tag with extremely excellent burnout can be obtained.

  When the antenna is formed of a conductive organic material with a film-like conductive pattern on the base material, the antenna, which is the next largest member after the base material, burns, so that residue can be further reduced. When the antenna is formed of a conductive inorganic material with a film-like conductive pattern on the base material, and the film thickness is 50 μm at the maximum, the equipment (management object) of the wireless tag explodes. The antenna becomes easier to miniaturize due to the impact of explosion. When a notch is formed on the outer periphery and / or a hole is formed in the antenna, the antenna is more easily miniaturized by the impact of an explosion.

  When components of a circuit for a wireless tag are mounted on a substrate with a conductive adhesive, anisotropic conductive adhesive, or low-temperature solder, the components are separated because they are burned or melted. The residue can be reduced. In addition, the components can be safely mounted at a low temperature that does not ignite the base material.

  In the case where at least a part of the components of the wireless tag circuit is formed of an organic material, the organic material can be burned to reduce residue. Even if a cover that covers at least a part of the substrate is attached, if the cover is formed to include a burnout material, no residue is generated.

  In the case where the wireless tag circuit includes a power supply unit that operates as a passive wireless tag, a battery is not included, so that a residue can be less likely to be generated than in an active wireless tag. When the wireless tag circuit includes a sensor and the measured value can be wirelessly transmitted from the antenna, reading with a wireless reader can easily and quickly perform measurement related to the installation target without contact. When the wireless tag circuit can wirelessly transmit preset information from the antenna, the equipment to be burned can be managed in a non-contact, simple and quick manner by reading with a wireless reader.

It is the top view and front view of a wireless tag to which the present invention is applied. It is a partially expanded view of the conductive pattern formed on the base material of the wireless tag to which the present invention is applied. It is an electrical block diagram of the radio | wireless tag to which this invention is applied. It is a charge of the state equipped with the wireless tag which applies this invention.

  Hereinafter, although the form for implementing this invention is demonstrated in detail, the scope of the present invention is not limited to these form examples.

  FIG. 1A shows a plan view of a wireless tag 1 to which the present invention is applied, and FIG. 1B shows a front view of the wireless tag 1. The wireless tag 1 is considered to be burned out as the equipment object equipped with the wireless tag 1 burns or generates heat. Further, even if a part of the wireless tag 1 may become a residue, it is considered that the residue is refined by heat and impact during combustion of the equipment object. Here, as an example, the wireless tag 1 will be described as being installed in a burnout container (an example of an installation target object) that contains a gunpowder that is a bullet or a gunpowder.

  The wireless tag 1 includes a base material 2, an antenna 3, and a wireless tag circuit 4.

  The substrate 2 is a thin sheet having insulating properties. The base material 2 is preferably formed with a small thickness in order to improve the burnout property, and is preferably formed with a size as small as possible. In order to reduce the size (area) of the base material 2, when the antenna 3 is formed in a loop shape as shown in the figure, one or a plurality of through holes (illustrated) are formed in the base material 2 inside the loop shape. (Omitted) may be formed. In the figure, an example in which the outer shape of the planar shape of the base material 2 is formed in a rectangular shape is shown, but the shape may be appropriately changed according to the application and the shape of the antenna 3. The substrate 2 may be formed in a three-dimensional shape such as a rectangular parallelepiped instead of a sheet (plate).

  Since the base member 2 is the largest member that occupies most of the wireless tag 1, the base member 2 is formed including a burnout material in order to improve the burnout property of the wireless tag 1.

  The burnout material is highly combustible, and hardly generates residue such as ash and unburned residue even when burned. As an example, the burnout material contains a nitrocellulose derivative and / or a nitroguanidine derivative, which is a self-reactive substance (a solid or liquid substance containing oxygen in the molecule and easily burned), as a main component. It is preferable to use what is. Nitrocellulose derivatives include nitrocellulose and acetyl nitrocellulose (flame retardant nitrocellulose). The nitroguanidine derivative includes nitroguanidine. The burnout material may contain other self-reactive substances used for explosives and explosives in addition to those containing nitro compounds. The burn-out performance (burn-out time, amount of residue, ignition point, etc.) of the burn-out material can be appropriately changed according to, for example, the use of the object to be equipped, the storage status, the use conditions, and the combustion status.

  Since nitrocellulose is excellent in combustibility and burnout, it can be preferably used as a main component of the burnout material. Celluloid, which is a synthetic resin produced from nitrocellulose and camphor, etc. is excellent in burnout and can easily form a sheet (film). Therefore, it can be preferably used as the substrate 2 (burnout material). it can. Since the manufacturing method of a celluloid is well-known, detailed description is abbreviate | omitted. Sheet-like celluloid sold in the market may be purchased, cut into a desired size, and used as the substrate 2. Moreover, you may use the brand name Nitrofilm (Nitrofilm) made from EURENCO company which has nitrocellulose as a main component and is processed into a sheet form as a burnout material. Also in this case, it can be used as the substrate 2 by cutting into a desired size.

  Moreover, the base material 2 may be formed with the material similar to a well-known burnout container. Since the burnout container is made of a burnout material, it is excellent in burnout. In particular, it is preferable to form the burnout container to which the wireless tag 1 is attached and the base material 2 from the same material, because the burnout performance of the wireless tag 1 and the burnout container can be made the same.

  The burnout container (burnout material), for example, as described in Patent Document 4, slurries the main components nitrocellulose, combustible fibers, and, if necessary, in water, Manufactured through a pressing process. As an example, the paper making is performed by suction paper making of the slurry. The squeezing is carried out by pressing the produced paper against a mold that matches the shape of the base material 2 or a flat mold, while heating. When a flat mold is used, the plate material squeezed into a flat plate shape is cut and used according to the shape of the substrate 2.

  In such a burnout material, the combustible fiber component is preferably 8 to 89% by weight, and the nitrocellulose component is preferably 10 to 91% by weight. The more the nitrocellulose component is contained, the better the burnability can be improved, but the strength is weakened, so the mixing ratio of the components is appropriately determined.

  As nitrocellulose components, in addition to those of the JIS standard (JIS K6703), those not included in the JIS standard are standardized by the ministries and agencies regarding requirements and test methods, and are defined by the Ministry of Defense Standard (NDS) K-4013C. Grade I (nitrogen content 12.45-12.75%) and Grade II (nitrogen content 13.35% by weight or more) and Grade III (nitrogen content 13.10) defined in (for nitrocellulose shells) 13.30 wt%) nitrocellulose can be used. As described above, in addition to nitrocellulose, self-reactive substances such as acetyl nitrocellulose (flame retardant nitrocellulose) and nitroguanidine may be used.

  The combustible fiber component is preferably a chemical pulp such as kraft pulp, but may be other chemical pulp or mechanical pulp, and is a fiber made of cellulose such as cellulose acetate, cellulose acetate propionate, cellulose acetate butyl, or ethyl cellulose. It may be a fiber derived from at least one of a herbaceous plant, a shrub plant, or an oak plant, may be waste paper, or may be an acrylic fiber. Further, as combustible fiber components, a refined cellulose fiber (cellulose) having an average fiber diameter of 1.5 μm at the maximum and an aspect ratio (average fiber length / average fiber diameter) obtained by dividing the average fiber length by the average fiber diameter is 10 or more. Nanofiber) may be included. When the refined cellulose fiber is contained, the strength of the base material 2 is improved.

  Herbaceous plants include kenaf, Asa, flax, abaca, bamboo, cotton, rice, wheat, bamboo shoots, and jute. Shrub plants include mulberry, mitsumata, and ganpi. Conifers and hardwoods. Examples of the used paper include corrugated used paper, newspaper used paper, and cut paper, and are made into paper after being processed into a fiber and processed as necessary to remove ink. The acrylic fiber is preferably a fiber made of a synthetic polymer mainly composed of acrylonitrile.

  The fine cellulose fiber may be referred to as, for example, cellulose nanofiber, fine cellulose fiber, cellulose nanofiber, microfibrillated cellulose, fine cellulose, cellulose fiber, fine cellulose fiber, or fine fibrous cellulose. Specifically, as a refined cellulose fiber, serish: KY-100G, KY-100S, FD-100F, FD-100G, FD-100S, FD-100M, FD-200L, PC-110S (all are Daicel Finechem Co., Ltd.) Product name) and BiNFi-s (Binfis) (registered trademark) (manufactured by Sugino Machine Co., Ltd .; product name).

  Additives contained in the burnout material as necessary include, for example, synthetic resins, stabilizers, and fixing agents. The synthetic resin is, for example, a binder resin. The content of the additive is 0 to 10% by weight. For example, the binder resin, the stabilizer, and the fixing agent are (6 to 12) :( 0.5 to 2.0) :( 0.1 to 0.1) in weight ratio. 1.0).

  Specific examples of the binder resin include synthetic resins such as emulsion polymerization styrene butadiene rubber and solution polymerization styrene butadiene rubber.

  Specific examples of stabilizers include ethyl central (ECL), acardite (AKII), diphemylamine (DPA), 2-nitrodimenylamine (2NO2DPA), phenolic antioxidants ADK STAB AO-80, AO- 50 (all manufactured by Asahi Denka Kogyo Co., Ltd .; trade name), 2,6-di-t-butyl-4-methylphenol (BHT), hydroquinone (HQ), and the like.

  Specific examples of the fixing agent include inorganic flocculants (for example, aluminum sulfate) and organic flocculants (for example, polymer flocculants).

  From the viewpoint of burnout, it is most preferable that the entire base material 2 is formed of a burnout material, but the base material 2 may be formed so as to include a burnout material. For example, you may form the base material 2 including a burnout material and a combustible material. The flammable material is a material that burns, and may be a material that produces a residue such as ash. For example, in order to make it easy to form the conductive pattern 11 on the surface of a sheet-like burnout material (such as a celluloid or a burnout material similar to a burnout container), or the burnout material and the conductive pattern 11 are not in direct contact with each other. For this purpose, or for surface protection, a thin surface layer (not shown) formed of an insulating and flammable organic material may be provided. When a surface layer is provided, the surface layer is made as thin as possible so that it burns with the combustion of the burnable material layer, and even if it becomes a residue, it is shattered by explosion of the explosive (burnout container). It is preferable to form by. In order to further reduce the surface layer, the surface layer is formed not only on the entire surface of the base material 2 but only on the surface of the base material 2 where the conductive pattern 11 is formed, that is, substantially the same shape as the pattern shape of the conductive pattern 11. May be formed. The surface layer may be a thin film made of an organic material, for example, and may be attached to the surface of the burnable material layer with a burnout or flammable adhesive (for example, a known nitrocellulose adhesive), or the organic material may be melted It may be formed by spraying or coating on the surface of the burnable material, or by dissolving the organic material with a solvent and applying it to the surface and drying the solvent.

  Moreover, the base material 2 may be formed including a burnout material and an inorganic material. For example, the sheet-like substrate 2 may be formed from nitrocellulose, which is a burnout material, and glass wool, which is an inorganic material. Alternatively, for example, a thin surface layer made of glass or ceramic which is an inorganic material may be provided on the surface of the sheet-like burnout material in order to form the conductor pattern 11 or to protect the burnout material. As the inorganic material used for the substrate 2, it is preferable to use, for example, a fibrous material or a brittle material that can be easily refined by combustion or explosion. When using an inorganic material for the substrate 2, it is preferable to use as small an amount as possible. Even if the substrate 2 contains a combustible material (organic material) or an inorganic material in addition to the burnout material, it is preferable that the burnout material is a main component.

  As the organic material for forming the surface layer, those that are easy to burn are preferable, and examples thereof include polyethylene, polypropylene, paper, and cellulose acetate film.

  As shown in FIG. 1, a film-like conductive pattern 11 is formed on the surface of the substrate 2. The conductive pattern 11 is used to electrically connect the mounting pattern 6 for mounting the components of the antenna 3 and the wireless tag circuit 4 (for example, the IC chip 20 and the sensor 25), and the respective parts and components. The wiring pattern is formed. The mounting pattern 6 is a pattern formed corresponding to the shape and arrangement of the terminals of each component, and is also referred to as a foot pattern or a land pattern. The conductive pattern 11 may be formed only on one side of the substrate 2 or may be formed on both sides. Like the multilayer substrate, the base material 2 may have a multilayer structure, and the conductive pattern 11 may be formed in each layer. When the conductive pattern 11 is formed on both sides or multiple layers, the conductive pattern 11 may be connected by a conductive through hole, or may be connected by a thin conductive cable (for example, a copper wire).

  Since the conductive pattern 11 is the second largest component after the base material 2, it is formed of a flammable material, or even if it becomes a residue, it is refined by heat or impact during the explosive of the explosive (burnout container). It is preferable to form it like this.

  Therefore, it is preferable to form the conductive pattern 11 with a conductive organic material. Since organic materials are flammable, they burn and produce almost no residue. As the conductive organic material, known materials can be used, and examples thereof include conductive resins such as polyacetylene, polyacene, polypyrrole, polythiophene, polyaniline, polyparaphenylene, polythiophene, and polyparaphenylene vinylene. Moreover, you may use the well-known organic material which added electroconductivity by kneading electroconductive powders, such as carbon black and a metal powder, as an electroconductive organic material. As these organic materials, it is preferable to use those having high conductivity and high combustibility. The conductive pattern 11 is preferably formed with a small thickness so that it can be easily burned and miniaturized.

  As a method for forming the conductive pattern 11 with a conductive organic material, a microcontact printing method, a scanning electron microscope method, a photolithography method, a screen printing method, an ink jet printing method, a capillary method, a transfer method, a dip-ben method, a line patterning method. Law.

  Further, the conductive pattern 11 may be formed of a conductive inorganic material. Examples of the conductive inorganic material include metals such as aluminum, silver, and copper, and carbon. When using a conductive inorganic material, use a small amount and form the conductive pattern 11 with a small width and a small thickness so that it can be miniaturized by the heat and impact of the explosive explosion. Is preferred.

  In a conventional general printed circuit board (rigid board or flexible board), the film thickness of the copper foil film (conductive pattern) is about 10 to 70 μm. If the explosion of the charge (explosive) is strong and can be finely divided, the conductive pattern 11 may be formed with a film thickness equal to or larger than the conventional film thickness. Since the thinner the film, the easier it is to make it finer during explosion, the film thickness is preferably at most 50 μm.

  Examples of a method for forming the conductive pattern 11 with a conductive inorganic material include a photolithography method, an etching method, a vapor deposition method, and a printing method. In particular, the vapor deposition method can be preferably employed because the conductive pattern 11 can be formed thin.

  All of the conductive pattern 11 may be formed of the same material, but may be formed of a different material for each portion. For example, the antenna 3 having a large area may be formed of a conductive organic material that easily burns, and the mounting pattern 6 having a small area may be formed of a conductive inorganic material capable of forming a precise pattern shape.

  When forming a through hole, it is preferable to use a conductive organic material. The through hole may be formed in the same manner as a conventional printed board. When connecting the patterns with a cable, it is preferable to fix the patterns with a conductive organic adhesive.

  When the conductive pattern 11 is formed, the film formation temperature, the film formation time, the static electricity removal conditions, etc. should be carefully taken so that the base material 2 does not ignite.

  The antenna 3 is a pattern antenna and is formed in a shape corresponding to the radio frequency and antenna type used by the wireless tag 1. In the figure, a loop type antenna 3 is shown as an example, but the antenna type and shape are not limited to this, and may be a known type. Since the shape of the antenna 3 can be made smaller as the radio frequency used becomes higher, the residue after combustion can be made difficult to occur.

  As shown in the round frame of FIG. 1, the conductive pattern 11 (particularly the antenna 3) has a corner 12 that bends linearly. In a normal substrate pattern design, when a pattern is bent, it is often bent in an arc shape (R shape) so as not to have a corner portion, but has a corner portion 12 as compared with the case of bending in an arc shape ( Bending (having a vertex) makes it easier to split and refine the inner vertex of the corner 12 as a starting point. Therefore, it is preferable to form a corner 12 that bends at an acute angle, a right angle, or an obtuse angle in a straight line without forming an arc shape (R shape) at a portion where the conductive pattern 11 is bent. 12 is more preferable. In addition, when it can fully refine by explosion, you may bend the conductive pattern 11 in circular arc shape.

  Further, as shown in a partially enlarged view of the conductive pattern 11 (antenna 3) in FIG. 2, a V-shaped, U-shaped, or cut-line-shaped notch (notch) is formed on the outer periphery (edge) of the conductive pattern 11. The part 15 may be formed in one place or a plurality of places. In addition, in the surface of the conductive pattern 11 (particularly, the antenna 3), a punching pattern (a punching hole) 16 that does not form a film in a round shape or a polygonal shape may be formed in one place or a plurality of places. When the notch 15 and / or the cut pattern 16 are formed, the conductive pattern 11 is easily torn and refined starting from these when the explosion occurs. When the cutout portion 15 and / or the cutout pattern 16 are formed, it is preferable to form the cutout portion 15 and / or the cutout pattern 16 so as not to affect the antenna characteristics.

  The antenna 3 is not formed with the conductive pattern 11, and for example, a metal cable (electric wire) such as copper or aluminum or a cable (fiber) formed of a conductive organic material is used. The antenna 3 may be formed by being attached to the surface so as to have the shape of the antenna 3. When the antenna 3 is formed by a cable, it is preferable to use a cable that is as thin as possible so that the antenna 3 can be miniaturized by explosion. Further, in order to facilitate miniaturization, a notch may be formed on the outer periphery of the cable, or a hole (extract hole) penetrating in the cross-sectional direction may be formed on the outer periphery of the cable.

  It is preferable to use as small components as possible for the components (for example, the IC chip 20 and the sensor 25) of the RFID tag circuit 4 shown in FIG. It is preferable to use it. Each component may be arranged so as to be mounted on one side of the substrate 2 or may be arranged so as to be mounted on both sides. Moreover, you may arrange | position a component so that it may embed in the base material 2. FIG.

  As each component, it is preferable to use a component that includes an inorganic material such as a metal, semiconductor, glass, or ceramic that exhibits high heat resistance as much as possible, and to use a small component even if it is used. It is preferable from the viewpoint of burnout that a component containing a large amount of flammable organic material is used. Furthermore, it is preferable to use components that are easily broken down and fragmented by the impact of an explosion.

  In the figure, an example is shown in which the wireless tag circuit 4 includes two components, an IC chip 20 and a sensor 25. If the sensor function is unnecessary, the sensor 25 is unnecessary. An IC chip 20 having a built-in sensor 25 may be used. Further, the circuit may be configured by using a plurality of (many) parts without using the one-chip type IC chip 20.

  When using an IC chip 20 for a wireless tag, many component manufacturers (for example, Hitachi, Fujitsu, Oki Electric Industry, NXP, Infinion, Texas Instruments, etc.) have developed and commercialized micro-sized ones. Therefore, you may use what has a required function. The IC chip 20 is nonflammable, and if it is not discharged from the gun barrel due to the explosive of the gunpowder, it becomes a residue. It is preferable to use a bare chip (die) that is not molded with a resin or ceramic package as the IC chip 20 because the size can be further reduced.

  When the sensor 25 is used, it is preferable to use a small sensor, and it is preferable to use a sensor that includes an organic material. The same applies when other parts are used. For example, when using capacitors, film capacitors that use organic materials such as polyester and polypropylene rather than ceramic capacitors, polyaniline, tetracyanoquinodimethane (TCNQ) complex salts, polypyrrole (PPy), polyethylenedioxythiophene It is preferable to use an electrolytic capacitor using a conductive organic material such as (PEDOT). For example, when using semiconductor components such as transistors and integrated circuits, tetracene, pentacene, perylene diimide (PTCDI), tetracyanoquinodimethane (TCNQ), poly-3-hexylthiophene (P3HT), polyfluorene, polydiacetylene, poly-2 It is preferable to use parts using conductive organic materials such as 5-thienylene vinylene and poly-paraphenylene vinylene (PPV).

  When the component parts (IC chip 20 and sensor 25) of the wireless tag circuit 4 are mounted (electrically connected and fixed) on the mounting pattern 6 of the substrate 2, a conductive adhesive or anisotropy rather than solder. It is preferable to mount using a conductive adhesive.

  For example, conductive adhesives include binder resin (main agent) that is responsible for fixing epoxy resin, urethane resin, silicone resin, acrylic resin, polyimide resin, etc., metal powder such as gold powder, silver powder, copper powder, carbon powder, graphite A conductive filler for conducting electricity such as powder is dispersed. A well-known thing can be used for a conductive adhesive. Some conductive adhesives are based on inorganic materials, but those based on organic materials (resins) are preferably used. By applying a conductive adhesive to the mounting pattern 6 (or the terminal of the component) and mounting the component on the substrate 2, the mounting pattern 6 and the component are fixed and electrically connected. Is done.

  The anisotropic conductive adhesive has conductivity in a direction perpendicular to a surface to be attached and has insulation in a planar direction. Anisotropic conductive adhesives include an anisotropic conductive film (ACF) formed into a film, and an anisotropic conductive adhesive (ACA; Anisotropic formed in a paste or liquid form that can be applied) Conductive Adhesive). An anisotropic conductive adhesive is a binder resin (main agent) responsible for fixing thermoplastic resins such as epoxy resins, acrylic resins and polyimide resins, and synthetic rubber, for example, gold coated onto nickel balls, and then destroyed by heat and pressure. Spherical conductive particles in which an insulating coating that dissolves is formed are dispersed. A well-known thing can be used as an anisotropic conductive adhesive body. By disposing the anisotropic conductive adhesive between the base material 2 and the component parts, for example, by thermocompression bonding, the mounting pattern 6 facing each other and the terminals of the component parts are electrically connected together. .

  Use of a conductive adhesive or anisotropic conductive adhesive has the following advantages. First, conductive adhesives and anisotropic conductive adhesives are mainly composed of a resin (organic material) and burn, so they do not produce residue more than solder. Second, since conductive adhesives and anisotropic conductive adhesives can be bonded at a lower temperature than solder, it is possible to safely mount components without igniting the base material 2 formed of a burnout material. it can.

  The igniting point (ignition temperature) of nitrocellulose alone cannot be said unconditionally because it varies depending on the external environment such as the properties of nitrocellulose, the heating method, and the heating time, but is generally said to be about 160-180 ° C. ing. The ignition point of the base material 2 containing nitrocellulose and the time to ignition vary depending on the amount of nitrocellulose contained in the base material 2 and the influence of other raw materials, but at least below the ignition point of nitrocellulose alone. Is desirable for safety reasons. Therefore, a conductive adhesive or anisotropic conductive adhesive that can be bonded at a low temperature below the ignition point of the nitrocellulose (self-reactive substance) used for the substrate 2 is used. A lower temperature during mounting is preferable because safety is improved. A shorter temperature addition time during mounting is preferable because safety is improved.

  It should be noted that any low-temperature solder that can be used below the ignition point of nitrocellulose (self-reactive substance) may be used for mounting. A known commercial product may be used as the low-temperature solder. When using low-temperature solder, the amount used is preferably as small as possible from the viewpoint of reducing residue and shortening the heating time.

  In addition, you may provide the sheet-like cover (illustration omitted) which covers at least one part of the radio | wireless tag 1 (The base material 2 in which the antenna 3 and the circuit 4 for radio | wireless tags were provided) shown in FIG. For example, the cover is formed in a sheet shape covering one side of the base material 2 (observation surface side in FIG. 1) and / or the other surface side (non-observation surface side in FIG. 1). The cover may have a size smaller than the outer shape of the base material 2, the same shape as the outer shape of the base material 2, or a size larger than the outer shape of the base material 2. The cover is used, for example, for protecting the wireless tag 1, or used as an adhesive sheet or an adhesive sheet for attaching to a burnout container.

  It is preferable from the viewpoint of burnout that the cover is formed to include a burnout material like the base material 2. For example, the same cover as the base material 2 is used as the cover. A surface layer made of a combustible organic material may be formed on the cover so that the burnout material of the cover does not directly touch the antenna 3 and the radio tag circuit 4. In any case, when the antenna 3 and the RFID tag circuit 4 are sandwiched between the base material 2 and the cover formed to include a burnout material, the burnout material is easily burnt. Therefore, for example, the antenna 3 or the RFID tag formed of an organic material. The combustion of the circuit 4 can be further promoted. The cover may be formed of a flammable organic material that does not include a burnout material. In this case, it is preferable that the cover be formed of a material that is as thin as possible and highly combustible. The cover is preferably affixed to the base material 2 using a known organic pressure-sensitive adhesive or adhesive that easily burns. Moreover, you may attach the adhesive and adhesive agent for affixing to a burnout container on the back surface (non-observation surface side of the base material 2 in FIG. 1) of the wireless tag 1. FIG. Also in this case, it is preferable to use a known organic pressure-sensitive adhesive or adhesive that easily burns.

  FIG. 3 shows an electrical block diagram of the wireless tag 1.

  The wireless tag 1 includes an antenna 3 and a wireless tag circuit 4. The wireless tag circuit 4 is an electronic circuit having an electronic component (electrical component) as a component, and includes the IC chip 20 and the sensor 25 as described above. For example, the IC chip 20 includes a transmission / reception unit 21, a control unit 22, a memory 23, and a power supply unit 24. These are known ones for wireless tags. These may be composed of a plurality of parts.

  As an example, the wireless tag 1 is a passive type in which a battery is not built in and a wireless signal received by the antenna 3 is converted into DC power by the power supply unit 24 and each unit operates with this power. The antenna 3 is used for transmitting and receiving radio signals and used for receiving power. For power reception, an antenna 5 indicated by a broken line in the figure may be provided separately from the antenna 3. When the power receiving antenna 5 is provided separately, the conductive pattern 11 is formed on the base material 2 in consideration of the generation of a residue as much as possible as in the antenna 3. The power supply unit 24 is a known power supply circuit for operating as a passive wireless tag, and is, for example, a rectification or storage circuit.

  The passive type wireless tag 1 is preferable because it can reduce the number of components and the amount of residue, but the wireless tag 1 may be an active type that operates by incorporating a battery (power source). In that case, a commercially available normal battery (for example, a button-type battery or single to five-type battery) is not used because its outer shell is made of metal and hardly burns. Instead, in consideration of burnout, a battery having an outer shell made of a burnable material such as celluloid or a combustible organic material is used. Furthermore, it is preferable that the electrode is formed of a conductive organic material without using a metal terminal for the electrode of the battery. The internal structure of the battery may be the same as that of a conventionally known battery. However, in consideration of burnout, a battery in which an organic material is frequently used is used. The shape of the battery is preferably formed in a sheet shape that can be reduced in size and easily refined by the impact of an explosion.

  The transmission / reception unit 21 is a circuit for transmitting and receiving radio signals via the antenna 3. The control unit 22 is a circuit having a CPU (Central Processing Unit) as an example, and comprehensively controls the operation of each unit of the wireless tag 1. Further, the control unit 22 has an A / D converter for A / D (analog / digital) conversion of the measurement value of the sensor 25. When the IC chip 20 does not include an A / D converter, the A / D converter may be externally attached to the IC chip 20. Further, if necessary, a control component such as a small CPU may be separately provided in addition to the IC chip 20.

  What is necessary is just to use the sensor 25 which can measure a desired measuring object. Examples of the sensor 25 include a temperature sensor, a humidity sensor, an optical sensor, a NOx (nitrogen oxide) gas sensor, other various gas sensors, a radiation sensor, and an acceleration sensor. When there are a plurality of measurement objects, the wireless tag 1 may include a plurality of sensors 25 corresponding to the measurement objects. When the sensor 25 is a temperature sensor, it is preferable to use a thermocouple or a resistance temperature detector that has a simple structure and can be formed in a minute size. When the sensor 25 can be formed of a semiconductor such as a semiconductor temperature sensor, the sensor 25 is further reduced in size by being formed so as to be incorporated in a semiconductor component used for the wireless tag circuit 4 such as the IC chip 20 or other CPU. This is more preferable. The semiconductor temperature sensor measures the temperature by using the principle that the resistance value of the semiconductor and the base-emitter voltage of the transistor change corresponding to the temperature change.

  The memory 23 is a rewritable nonvolatile memory that stores information necessary for management and measurement values measured by the sensor 25. Information necessary for management includes, for example, information on the burnout container (such as the production lot number and production location of the burnout container, the date of manufacture, and an individual number (ID)), and information on the wireless tag 1 (for example, the wireless tag 1). Production lot number, individual ID number, etc.).

  Information necessary for management is transmitted as a wireless signal from a wireless reader / writer (not shown), for example, and the antenna 3 and the transmission / reception unit 21 receive and demodulate the wireless signal, and the control unit 22 performs information necessary for management. Is determined and stored in the memory 23. Information and measurement values stored in the memory 23 are read from the memory 23 in response to a request by a wireless signal from a wireless reader (wireless reader / writer), modulated by the transmission / reception unit 21, and transmitted to the antenna 3. Can be transmitted wirelessly. Further, the measurement value may be acquired from the sensor 25 when a measurement request is received from the wireless reader and wirelessly transmitted without being stored in the memory 23. The control unit 22 may determine the content of the wireless signal from the wireless reader so that only necessary information or only measured values can be selectively wirelessly transmitted.

  In FIG. 4, the charge 100 of the state equipped with the wireless tag 1 of this invention is shown. As described above, the charge 100 is the one in which the explosive 110 is sealed in the burnable container 101, and is loaded into the chamber of the gun barrel and ignited to shoot the bullet at the time of bullet shooting.

  As described in, for example, Patent Document 4, the burnout container 101 has a container body 103 and an upper lid 102 formed of the same burnout material, and burns out when burned. The wireless tag 1 is attached to the wall surface (inner wall or outer wall) of the container main body 103 or the upper lid 102, embedded in the wall, or put in the burnout container 101 together with the explosive 110, so that the charge 100 Equipped.

  By mounting the wireless tag 1 on the medicine 100, the information on the wireless tag 1 and the measurement result can be instantaneously read in a non-contact manner using a wireless reader to manage the medicine 100. In addition, by installing the wireless tag 1 in each of the plurality of charges 100, even if the number of charges 100 is large, management can be performed selectively or collectively.

  When the sensor 25 (see FIG. 1) of the wireless tag 1 is a temperature sensor, the temperature of the explosive 110 can be measured safely, quickly and accurately without making a hole in the burnout container 101. Therefore, the temperature of the explosive 110 can be measured for all the charges 100 to be used even in a busy situation in preparation for shooting, and the trajectory calculation of the bullet can be accurately performed. When the sensor 25 is a NOx gas sensor, the degree of explosive deterioration can be measured based on the measured amount of NOx gas.

  When the charge 100 is ignited, the wireless tag 1 is burned as the gunpowder 110 and the burnout container 101 are burned and exploded. As shown in FIG. 1, the base material 2 occupying most of the wireless tag 1 is formed including a burnout material, and thus burns out and disappears instantaneously. The member formed of the remaining organic material burns and hardly remains. Since only a small amount of inorganic material is used, the amount of residue is small.

  Even if the conductive pattern 11 is formed of an inorganic material, the base material 2 is instantly extinguished so that a single thin film is formed. If the notch 15 and the cut pattern 16 (both see FIG. 2) are formed in the conductive pattern 11, it is easier to make the pattern finer. When the conductive pattern 11 and the components of the RFID tag circuit 4 (IC chip 20 and sensor 25) are mounted on the substrate 2 with a conductive adhesive, anisotropic conductive adhesive, or low-temperature solder, As the parts burn and melt and separate each other, the residue becomes smaller. If an organic material is used for at least a part of the component parts, the organic material burns and the component parts are easily broken into pieces, and the residue becomes finer. Since the charge 100 explodes particularly in the cannon, the smaller the residue, the more easily the residue is discharged out of the cannon due to the impact of the explosion, and the amount of residue remaining in the cannon at the end. Is even less.

  Note that the object to be equipped with the wireless tag 1 is not limited to the charge 100 (burn-out container 101), and is an object to be equipped if it is combusted. In particular, it can be preferably equipped for those using explosives or explosives, and these include weapon ammunition, various pyrotechnics, smoke fires, and propellants for flying objects. Even if no explosives or ammunition is used, an object to be burned such as a container incinerated at an incineration disposal site or the like may be used.

  Hereinafter, an embodiment in which the wireless tag 1 of the present invention is prototyped will be described in detail. The scope of the present invention is not limited to these examples.

(Example)
As raw materials for the base material 2 of the wireless tag 1, nitrocellulose (75% by weight), kraft pulp (softwood bleached pulp) (20% by weight), binder resin (4% by weight), stabilizer (1% by weight), A slurry suspended in water was prepared by mixing with the fixing agent. From this slurry, a rough body was prepared by a suction papermaking method, and the coarse body was placed in a male mold heated to 125 ° C., and the mold was pressed with a female mold to form a disk with a shape of φ145 mm and a density of about 900 kg / m3, A press-molded product having a wall thickness of about 1 mm was produced. A material cut out from the molded product into a plate shape was used as the substrate 2.

  A copper conductive pattern 11 (including the antenna 3 and the mounting pattern 6) was formed on the base material 2 prepared above by vacuum deposition. In using the vacuum deposition method, the film formation temperature was controlled so that the temperature of the base material 2 did not become the ignition point or higher, as in the case of film formation on a resin film having a low melting point (polypropylene or the like).

  Next, each electronic component constituting the wireless tag circuit 4 was mounted on the substrate 2 on which the conductive pattern 11 was formed, using a conductive adhesive. A temperature sensor was mounted as the sensor 25. For the conductive adhesive, the product name CW2400 (CircuitWorks), which is a commercially available conductive epoxy adhesive, is cured under conditions of 70 ° C. for 10 minutes, each electronic component is mounted, and a temperature measurement type wireless Tag 1 was produced.

  The produced wireless tag 1 was installed in the burnout container 101, and it was confirmed that communication with a wireless reader and temperature measurement were possible.

(Comparative example)
As a comparative example, a conventional wireless tag of temperature measurement type using a general glass epoxy substrate and using solder for mounting components was manufactured.

(Burn test)
The burn-out performance of the examples and comparative examples was confirmed. As for the method of the burn-out test, each of the examples and comparative examples was installed in a burn-out container, and then the burn-out container itself was ignited and burned, and the residue was confirmed after the completion of combustion.

  As a result of the burn-out test, in the comparative example, the glass epoxy substrate itself remained as an unburned residue in its shape, and most of the result was not burned. On the other hand, in the example, the wireless tag 1 itself disappeared completely, and even if the collected residue was confirmed, the conductive pattern 11 and each electronic component were miniaturized to a state where there was no problem as a residue. .

  Since the wireless tag to which the present invention is applied is considered to be burnt out, it burns with the object to be equipped and even if a residue is generated, the amount is small. Therefore, it can be used by attaching to various burning objects. In particular, it can be preferably used for things using explosives or explosives.

  1 is a wireless tag, 2 is a base material, 3 is an antenna, 4 is a wireless tag circuit, 5 is an antenna, 6 is a mounting pattern, 11 is a conductive pattern, 12 is a corner, 15 is a notch, and 16 is a cutout Pattern, 20 is an IC chip, 21 is a transmission / reception unit, 22 is a control unit, 23 is a memory, 24 is a power supply unit, 25 is a sensor, 100 is a charge, 101 is a burnable container, 102 is an upper lid, 103 is a container body, 110 is gunpowder.

Claims (11)

A wireless tag comprising a base material, an antenna provided on the base material, and a wireless tag circuit mounted on the base material and electrically connected to the antenna,
The wireless tag according to claim 1, wherein the base material includes a burnout material of a self-reactive substance containing oxygen in a molecule .   The wireless tag according to claim 1, wherein the burnout material includes a nitrocellulose derivative and / or a nitroguanidine derivative.   3. The wireless tag according to claim 1, wherein the antenna is formed with a film-like conductive pattern on the base material using a conductive organic material. 4.   3. The antenna according to claim 1, wherein the antenna is formed with a film-like conductive pattern on the base material using a conductive inorganic material, and the film thickness of the conductive pattern is at most 50 μm. Wireless tag.   5. The wireless tag according to claim 1, wherein the antenna has a cutout portion and / or a hole formed in an outer periphery thereof.   6. The component of the circuit for a wireless tag is mounted on the base material by a conductive adhesive, an anisotropic conductive adhesive, or a low-temperature solder. 6. Wireless tag.   The wireless tag according to any one of claims 1 to 6, wherein at least a part of components of the circuit for the wireless tag is formed of an organic material.   The wireless tag according to claim 1, further comprising: a cover that covers at least a part of the base material, wherein the cover includes a burnout material.   The wireless tag according to claim 1, wherein the wireless tag circuit includes a power supply unit for operating as a passive wireless tag.   The wireless tag according to claim 1, wherein the wireless tag circuit includes a sensor that measures a measurement target, and the measurement value of the sensor can be wirelessly transmitted from the antenna. .   The wireless tag according to claim 1, wherein the wireless tag circuit is capable of wirelessly transmitting preset information from the antenna.

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