CN107392287B - UHF RFID tag for laundry management and manufacturing method - Google Patents
UHF RFID tag for laundry management and manufacturing method Download PDFInfo
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- CN107392287B CN107392287B CN201710573371.2A CN201710573371A CN107392287B CN 107392287 B CN107392287 B CN 107392287B CN 201710573371 A CN201710573371 A CN 201710573371A CN 107392287 B CN107392287 B CN 107392287B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
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Abstract
A UHF RFID label for laundry management comprises a label chip, a label antenna, a substrate and a covering layer, wherein the substrate and the covering layer are used for supporting and packaging the label chip and the label antenna, the label antenna is of a multi-strand conductive fiber stranded wire structure, and the label chip is placed in an inductance loop of the label antenna and is in mutual coupling connection with the label antenna. The invention has the characteristics of safety, reliability, low cost, good environmental adaptability, and strong kneading and bending resistance, extrusion resistance and high-speed impact resistance.
Description
Technical Field
The invention relates to a UHF RFID label, in particular to a UHF RFID label for laundry management and a manufacturing method thereof.
Background
The RFID technology is developed rapidly, the application field is wider and wider, and the product structure is also diversified. The basic principle of the conventional UHF electronic tag is that an antenna on the electronic tag is used for receiving electromagnetic wave signals from a reader-writer and a transmitting tag, and when the reader-writer scans the UHF electronic tag, the tag-marked object is automatically identified. The UHF electronic tag generally consists of a tag antenna and a tag dedicated chip, the tag antenna is used for receiving and transmitting electromagnetic wave signals, and the performance of the tag antenna is directly related to the stability and sensitivity (effective operating distance) of the received and transmitted signals; the tag chip is equivalent to a data storage with wireless modulation transmitting and receiving functions, and the performance of the tag chip determines the operating speed and the data storage capacity of the electronic tag. But there has not been a suitable label in laundry management applications. The traditional label, whether the label antenna or the label chip, cannot meet the repeated folding of clothes in water washing, and most of the two conditions, namely connection failure between the chip and the antenna or damage failure of the label antenna, become important factors influencing the application of the label. Especially, the characteristics and damage mechanism of the tag antenna are rarely researched, and the current scheme of the water-washing tag is not ideal because the research on the mechanism is less. Firstly, the label cannot be guaranteed not to be damaged or the performance of the label cannot be changed during application; secondly, the consistency of performance parameters of the initial state of the label cannot be guaranteed, and the reading requirement of a dense label group for laundry management is difficult to realize; in addition, the process and the manufacturing cost of the product of the prior scheme are high, so that the popularization of the application is limited. The application requirement of the water-washing label not only needs to have the mechanical strength of the label, but also has strong anti-bending, anti-extrusion and anti-high-speed impact capabilities, and also needs to determine the environmental applicability of the sensitivity of the label and the manufacturing process cost of the label. In addition, when the traditional RFID tag is used for hospital garment management, the traditional RFID tag is required to meet the MRI (magnetic resonance imaging) safety requirement and cannot generate artifacts. Therefore, the water-washing label not only can meet the safety and reliability of a plurality of washing cycles, but also meets the MRI safety requirement.
Disclosure of Invention
The UHF RFID tag for laundry management is safe, reliable, low in cost, good in environmental adaptability, and strong in kneading resistance, extrusion resistance and high-speed impact resistance.
The invention also provides a manufacturing method of the UHF RFID label for laundry management.
The technical scheme adopted by the invention is as follows:
a UHF RFID label for laundry management, including a label chip, a label antenna, a substrate supporting and encapsulating the label chip and the label antenna, and a cover layer, characterized in that: the tag antenna is in a stranded conductive fiber stranded wire structure, and the tag chip is placed in an inductance loop of the tag antenna and is in mutual coupling connection with the tag antenna.
Further, the tag chip is an integrated packaging chip and is formed by packaging the RFID crystal source chip and the inductance circuit in an integrated mode.
Furthermore, the tag antenna is formed by twisting a plurality of strands of superfine conductive metal fibers, so that the tag antenna has high flexibility.
Furthermore, the conductive metal fiber is composed of more than 10 strands of fine fibers, the resistivity of the conductive metal fiber is lower than 100 ohm/meter, and the tensile strength of the conductive metal fiber is more than 10 newtons.
Further, the conductivity of the conductive fiber material is not lower than 10000000 siemens/m, and the relative permeability of the conductive fiber material is not higher than 10.
Furthermore, the inductance loop is arranged in the middle of the tag antenna and is of a complete annular structure, namely, the current is a complete closed loop current.
Further, the substrate is a chemical fiber fabric or rubber substrate, and the tag antenna and the tag chip are attached to the chemical fiber fabric or rubber substrate.
Further, the cover layer is made of chemical fiber fabrics or rubber flexible materials or film flexible materials, and the tag antenna and the tag chip are wrapped between the cover layer and the substrate.
Furthermore, the tag antenna is attached to a chemical fiber fabric or rubber substrate by adopting ultrasonic wave wire-planting equipment, and a plurality of strands of conductive fiber stranded wires are embedded into the flexible substrate according to a set shape by ultrasonic wave welding so as to keep a certain geometric shape.
The manufacturing method of the UHF RFID label for laundry management comprises the following specific steps:
(1) preparing a substrate;
(2) embedding the tag antenna on a substrate by adopting ultrasonic wire embedding equipment, wherein the middle of the tag antenna is an inductance loop with a complete annular structure;
(3) placing the label chip in the middle of the inductance loop by using an automatic chip sucking machine;
(4) and covering the covering layer on the substrate to wrap the label antenna and the label chip in the covering layer.
The invention has the beneficial effects that:
1. the invention adopts a non-contact connection scheme of the tag antenna and the tag chip, namely the tag antenna is connected with the tag chip in a mutual coupling mode, the tag chip adopts an integrated packaging form and is internally integrated with a small loop antenna, and the tag antenna and the tag chip carry out energy and information transmission in the mutual coupling mode. The connection mode solves the problem that the connection between the tag antenna and the tag chip fails due to disconnection after a plurality of washing weeks in the traditional direct connection mode of the RFID tag antenna and the chip. Meanwhile, the problem that the tag antenna is easy to damage is solved, and the anti-bending characteristic is improved.
2. The invention adopts a plurality of strands of conductive fiber twisted yarns to manufacture the tag antenna, and the fabric is used as a substrate, so that the tag antenna has extremely high flexibility, and the problem that the conductor material in other states has large characteristic change of the tag antenna due to twisting and breaking is fundamentally solved. In the research of the multi-strand conductive fiber material, the strand number limiting property, the electrical conductivity and the magnetic conductance property of the material used for the tag antenna are also clarified. The number of conductor strands and the tensile strength value are obtained through experiment and theoretical analysis, and the condition is met, so that the label cannot be damaged or lose efficacy in a plurality of washing cycles, and the MRI safety of the label can be ensured, so that the label can be used for the label for hospital garment management.
3. The invention adopts the complete ring magnetic coupling design, solves the problem of small coupling coefficient between the tag antenna and the tag chip, widens the working frequency band of the tag due to the adoption of the complete ring magnetic coupling, realizes that the performance parameter change of the tag is less than 3dB in a frequency band of 840-960 MHz, and ensures the read-write safety of the tag in various environments and various clothes.
4. The invention relates to a tag antenna manufacturing process for ultrasonic wire planting on a substrate of a chemical fiber fabric, which solves the problem of geometric figure manufacturing accuracy and manufacturing efficiency of tag antennas, realizes batch manufacturing of tags and meets the low-cost practicability of RFID tags.
Drawings
FIG. 1 is a schematic diagram of the structure of the label of the present invention.
FIG. 2 is a cross-sectional view of a label layer structure of the present invention.
Fig. 3 is a structural view of a multi-strand conductive fiber of the present invention, wherein fig. 3a is a schematic side sectional view and fig. 3b is a schematic cross-sectional view.
FIG. 4 is a diagram of an integrated package chip according to the present invention.
Fig. 5 is an initial schematic diagram of a tag antenna made of a conductive line without an insulating layer.
Fig. 6 is a schematic diagram of the tag antenna manufactured by folding without the insulating layer and the conductive wire.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the invention to these embodiments. It will be appreciated by those skilled in the art that the present invention encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.
Example one
Referring to fig. 1 and 2, a UHF RFID tag for laundry management includes a tag chip 1, a tag antenna 3, a substrate 2 for supporting and packaging the tag chip 1 and the tag antenna 2, and a cover layer 3, wherein the tag chip 1 is placed in an inductance loop of the tag antenna 3 and is mutually coupled with the tag antenna 3, the inductance loop is arranged in the middle of the tag antenna 3 and is a complete loop structure, that is, a current is a complete closed loop current.
The tag antenna 2 of this embodiment is a stranded structure of conductive fibers. The tag antenna 2 is formed by twisting a plurality of strands of superfine conductive metal fibers, so that the tag antenna has high flexibility. The conductive metal fiber is composed of more than 10 strands of fine fibers, the resistivity of the conductive metal fiber is lower than 100 ohm/meter, and the tensile strength of the conductive metal fiber is more than 10 newtons. The conductivity of the conductive fiber material is not lower than 10000000 siemens/m, and the relative magnetic permeability of the conductive fiber material is not higher than 10.
Specifically, dozens of plastic-coated conductive fiber stranded wires with the relative magnetic permeability of less than 10, the electric conductivity of more than 10000000 siemens/m and the diameter of less than 50 microns are adopted to design a complete loop dipole tag antenna 2, and an integrated and packaged tag chip 1 is placed in a loop in the middle of the dipole antenna. The conductive fiber strand is schematically shown in a and b in fig. 3, and consists of 31 stainless steel wires and 32 plastic coating.
Referring to fig. 4, the tag chip 1 is an integrated package chip formed by integrally packaging the RFID chip 11 and the inductive circuit 12.
In this embodiment, the substrate 2 is a chemical fiber fabric or rubber substrate, and the tag antenna 3 and the tag chip 1 are attached to the chemical fiber fabric or rubber substrate.
In this embodiment, the cover layer 4 is a chemical fiber fabric or a rubber flexible material or a film flexible material, and the tag antenna 3 and the tag chip 1 are wrapped between the cover layer 4 and the substrate 2.
In this embodiment, the tag antenna 3 is attached to a chemical fiber fabric or rubber substrate by using an ultrasonic wire-planting device, and multiple strands of conductive fiber stranded wires are embedded into a flexible substrate according to a set shape by ultrasonic welding so as to keep a certain geometric shape.
This embodiment has adopted tag antenna 3 and tag chip 1 non-contact connection scheme, and tag antenna 3 adopts the cross-coupling mode to be connected with tag chip 1 promptly, and tag chip 1 adopts integrated packaging form, has integrateed a small-size loop antenna in, and tag antenna 3 carries out energy and information transmission through the cross-coupling mode with tag chip 1. The connection mode solves the problem that the connection between the tag antenna and the tag chip fails due to disconnection after a plurality of washing weeks in the traditional direct connection mode of the RFID tag antenna and the chip. Meanwhile, the problem that the tag antenna is easy to damage is solved, and the anti-bending characteristic is improved. Meanwhile, the problem of small coupling coefficient between the tag antenna 3 and the tag chip 1 is solved by adopting the complete ring magnetic coupling design, the working frequency band of the tag is widened by adopting the complete ring magnetic coupling, the change of the performance parameter of the tag is less than 3dB within the frequency band of 840-960 MHz, and the reading and writing safety of the tag in various environments and various clothes is ensured.
In the embodiment, the tag antenna 3 is made of a plurality of strands of conductive fiber stranded wires, and the fabric is used as the substrate 1, so that the tag antenna has extremely high flexibility, and the problem that the conductor materials in other states have large characteristic changes of the tag antenna due to twisting and breaking is fundamentally solved. In the research of the multi-strand conductive fiber material, the strand number limiting property, the electrical conductivity and the magnetic conductance property of the material used for the tag antenna are also clarified. The number of conductor strands and the tensile strength value are obtained through experiment and theoretical analysis, and the condition is met, so that the label can be used for a plurality of washing cycles without damage and failure, and the MRI safety of the label can be ensured, so that the label can be used for the label for hospital garment management.
Example two
The method for manufacturing the UHF RFID tag for laundry management in the first embodiment comprises the following specific steps:
(1) preparing a substrate 2;
(2) embedding a tag antenna 3 on a substrate 2 by adopting ultrasonic wire embedding equipment, wherein the middle of the tag antenna 3 is an inductance loop with a complete annular structure;
(3) placing the label chip 1 in the middle of an inductance loop by adopting an automatic chip sucking machine;
(4) the cover layer 4 covers the substrate to wrap the tag antenna and the tag chip therein.
Adopt the automatic line equipment of planting of ultrasonic wave to weld conductive fiber on the basement of chemical fibre fabric according to the design pattern on this embodiment label manufacture craft, use automatic suction machine to place integrated encapsulation label chip in the middle of the label antenna ring, cover rubber or fabric and other flexible material again, the adhesion mode is that rubber is moulded plastics or scalds to connect and the adhesion mode. The layered structure of the label is shown in figure 2. If the tag antenna 3 is made of the conductive wire with the non-insulating coating, the conductive wire is designed into a pattern shown in fig. 5, the conductive wire is fixed with the substrate 2 and then folded in half, the substrate 2 serves as an insulating layer, a loop in the middle of the dipole antenna is opened, and a complete annular structure of the tag antenna 3 is obtained, and the figure 6 shows.
The embodiment has carried out the tag antenna preparation technology that the ultrasonic wave was planted line on the basement of chemical fibre fabric, has solved tag antenna's geometric figure preparation precision and preparation efficiency, realizes the label and makes in batches to satisfy the low-cost practicality of RFID label.
Claims (7)
1. A UHF RFID label for laundry management, including a label chip, a label antenna, a substrate supporting and encapsulating the label chip and the label antenna, and a cover layer, characterized in that: the tag antenna is in a stranded conductive fiber stranded wire structure, and the tag chip is placed in an inductance loop of the tag antenna and is in mutual coupling connection with the tag antenna; the tag antenna is formed by twisting a plurality of strands of superfine conductive metal fibers, so that the tag antenna has high flexibility; the conductivity of the conductive fiber material is not lower than 10000000 siemens/m, and the relative magnetic conductivity of the conductive fiber material is not higher than 10; when the outer surface of a conductive wire for manufacturing the tag antenna is provided with a non-insulating coating, the specific manufacturing steps are as follows: (1) preparing a substrate; (2) embedding the tag antenna on a substrate by adopting ultrasonic wire embedding equipment, fixing a conductive wire and the substrate, and then folding the conductive wire and the substrate in half to enable the substrate to serve as an insulating layer, so that a loop in the middle of the dipole antenna is opened, and a complete loop structure of the tag antenna is obtained, wherein an inductance loop in the complete loop structure is arranged in the middle of the tag antenna; (3) placing the label chip in the middle of the inductance loop by using an automatic chip sucking machine; (4) and covering the covering layer on the substrate to wrap the label antenna and the label chip in the covering layer.
2. The UHF RFID tag for laundry management of claim 1, wherein: the tag chip is an integrated packaging chip and is formed by integrally packaging an RFID crystal source chip and an inductance circuit.
3. The UHF RFID tag for laundry management of claim 1, wherein: the conductive metal fiber is composed of more than 10 strands of fine fibers, the resistivity of the conductive metal fiber is lower than 100 ohm/meter, and the tensile strength of the conductive metal fiber is more than 10 newtons.
4. The UHF RFID tag for laundry management of claim 1, wherein: the inductance loop is arranged in the middle of the tag antenna and is of a complete annular structure.
5. A UHF RFID tag for laundry management according to any of claims 1 to 4, wherein: the substrate is a chemical fiber fabric or rubber substrate, and the tag antenna and the tag chip are attached to the chemical fiber fabric or rubber substrate.
6. The UHF RFID tag for laundry management of claim 5, wherein: the cover layer is made of chemical fiber fabric or rubber flexible material or film flexible material, and the tag antenna and the tag chip are wrapped between the cover layer and the substrate.
7. The UHF RFID tag for laundry management of claim 5, wherein: the tag antenna is attached to a chemical fiber fabric or rubber substrate by adopting ultrasonic wire planting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710573371.2A CN107392287B (en) | 2017-07-14 | 2017-07-14 | UHF RFID tag for laundry management and manufacturing method |
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| CN201710573371.2A CN107392287B (en) | 2017-07-14 | 2017-07-14 | UHF RFID tag for laundry management and manufacturing method |
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| CN107392287A CN107392287A (en) | 2017-11-24 |
| CN107392287B true CN107392287B (en) | 2021-01-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109919288A (en) * | 2019-02-16 | 2019-06-21 | 江苏中科智睿物联网科技有限公司 | A kind of novel omnidirectional's washer wrinkle fabric label antenna |
| WO2021033005A1 (en) | 2019-08-22 | 2021-02-25 | Linxens Holding | Antenna for a radio frequency identification transponder and radio frequency identification transponder |
| CN112598101A (en) * | 2020-12-18 | 2021-04-02 | 浙江凯瑞博科技有限公司 | Washable electronic tag integrated with RFID antenna and manufacturing method thereof |
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| CN103246919B (en) * | 2013-05-21 | 2016-08-10 | 无锡市富华科技有限责任公司 | A kind of Durable radio-frequency identification laundry tag and manufacturing process thereof |
| US20160148086A1 (en) * | 2013-06-19 | 2016-05-26 | Ross Robert Clarke | Radio Frequency Identification Tag |
| CN104252643A (en) * | 2013-06-28 | 2014-12-31 | 成都新方洲信息技术有限公司 | Long-distance communication full-surrounding type disconnected RFID (radio frequency identification) tag |
| WO2017060222A1 (en) * | 2015-10-09 | 2017-04-13 | Nv Bekaert Sa | Antenna for use in an rfid tag |
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