CN108985430A - A kind of RFID tag with humidity function - Google Patents
A kind of RFID tag with humidity function Download PDFInfo
- Publication number
- CN108985430A CN108985430A CN201810710919.8A CN201810710919A CN108985430A CN 108985430 A CN108985430 A CN 108985430A CN 201810710919 A CN201810710919 A CN 201810710919A CN 108985430 A CN108985430 A CN 108985430A
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- Prior art keywords
- moisture absorption
- layer
- rfid
- humidity
- line
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07775—Antenna details the antenna being on-chip
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Details Of Aerials (AREA)
Abstract
A kind of RFID tag with humidity function, belong to radio RF recognition technology field, basic pattern is by moisture absorption layer, the capacitance structure that glue-line and RFID antenna layer are constituted, structure novel, since RFID antenna layer moisture absorption is lower, glue-line is caught in the middle, the dielectric coefficient of the latter two is smaller by influence of moisture, and moisture absorption layer itself belongs to a kind of wet stock easy to moisture absorption that takes off, and it is located at the inclined outside of product structure, it is influenced vulnerable to ambient humidity and dielectric coefficient is caused to change, with this characteristic as the basis of perception, it can be applicable to ambient humidity, clothes dries degree, the wet degree of Human Urine, human body makes the fields such as degree soaked with sweat, special convenience with the inexpensive humidity and RFID code quickly and wirelessly read.
Description
Technical field
The invention belongs to radio RF recognition technology fields, are related to a kind of electronic tag, have more particularly to one kind wet
Spend the RFID tag of sensing function.
Background technique
Electronic tag can play the role of identifying identification, item tracking, information collection as data medium.Electronic tag,
The RFID system that reader, antenna and application software are constituted directly is connected with corresponding management information system.Each article is all
It can be accurately tracked, be obtained with institute under the acquisition including real time data, safe data access channel, off-line state
There is product information etc..Currently, RFID technique has been widely used in numerous necks such as industrial automation, business automation
Domain, the extensive use of RFID tag bring more conveniences to people's lives really.
Currently, though need not power, only transmitting the identifier and inside note of RFID tag due to RFID tag or Tag
The function of recalling attribute has no the sensing and transfer function of the environmental conditions such as temperature, humidity.Therefore, using RFID tag in environment
Application limitation is more in terms of humidity, clothes dry the wet degree of degree, Human Urine, human body makes the sensing such as degree soaked with sweat, and application cost is high, makes
It is looked into convenience, it is difficult to be generalized on more universal product.
Summary of the invention
The purpose of the present invention is at present with RFID tag ambient humidity, clothes dry the wet degree of degree, Human Urine,
Human body makes degree etc. application soaked with sweat and limits more, application cost height, and ease of use is poor, it is difficult to be generalized on more universal product
The disadvantages of equal, propose a kind of RFID tag for having the function of humidity and being not necessarily to battery, quickly and easily read meeting
On the basis of the function of RFID code, humidity and transfer function are further expanded.
Technical solution of the present invention: a kind of RFID tag with humidity function, including be made of antenna and chip
RFID antenna layer；It is characterized by: the RFID antenna layer is equipped with moisture absorption layer, the moisture absorption layer passes through glue-line and RFID days
Line layer is bonded to form capacitance structure.
The top of the moisture absorption layer is equipped with upper fitting glue-line.
The lower section of the label layer is equipped with lower fitting glue-line.
Be bonded glue-line or directly with one layer of plastics by RFID antenna layer in conjunction with moisture absorption layer.
The lower section of the lower fitting glue-line is equipped with facestock layer.
The invention has the benefit that a kind of RFID tag with humidity function proposed by the present invention, basic model
Formula is the capacitance structure being made of moisture absorption layer, glue-line and RFID antenna layer, structure novel, due to RFID antenna layer moisture absorption compared with
Low, the dielectric coefficient that glue-line is caught in the middle the latter two is smaller by influence of moisture, and moisture absorption layer itself belong to it is a kind of it is easy to moisture absorption take off it is wet
Material, and it is located at the side of the nearly measured body of product structure, the humidity vulnerable to measured body influences and dielectric radio or capacitance is caused to become
Change, with this characteristic as the basis of perception, using the correlation of material humidity and dielectric radio, the correlation of dielectric radio and capacitor,
Capacitor and antenna combination at impedance correlation and antenna combination at impedance and the matching of chip impedance be that can regulate and control
RFID sensitivity and read away from principle, near label ambient humidity or moisture content increase and decrease will make humidity sensing layer moisture absorption or take off it is wet, thus this
The dielectricity of humidity sensing layer changes therewith, and the variation of this dielectricity causes the capacitor of RFID antenna to change, and makes the day of RFID
Line combined impedance changes, and the matching of antenna combination impedance and chip interior impedance is caused to change, cause sensitivity or read away from
Increase and decrease therewith, at this point, using having measurement sensitivity, read away from, or can the RFID reader of modulation power threshold values test
By means of sensitivity or read away from or minimum effective power threshold values convert indirectly and measure its humidity, working principle is clear, this RFID
Label can be used the RFID reader with decoding and scaling function software while read the humidity of RFID identifier and label,
Can be applicable to ambient humidity, clothes dries degree, the wet degree of Human Urine, human body make the fields such as degree soaked with sweat, have low cost quickly
And the special convenience of the humidity and RFID code wirelessly read.
Detailed description of the invention
Fig. 1 is basic pattern structural schematic diagram of the present invention.
Fig. 2 is the structural schematic diagram of first embodiment in the present invention.
Fig. 3 is the structural schematic diagram of second embodiment in the present invention.
Fig. 4 is the structural schematic diagram of 3rd embodiment in the present invention.
Fig. 5 is the relation schematic diagram of wet sensitive component capacitance and relative humidity in the present invention.
In figure: moisture absorption layer 1, glue-line 2, antenna 3, chip 4, lower fitting glue-line 5, upper fitting glue-line 6, facestock layer 7.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
As shown in Figure 1, a kind of RFID tag with humidity function, including the RFID antenna being made of antenna and chip
Layer；RFID antenna layer is equipped with moisture absorption layer, and moisture absorption layer forms capacitive junctions by the way that glue-line (or plastic layer) is be bonded with RFID antenna layer
Structure.This is basic pattern of the invention, and moisture absorption layer is laminated by means of one layer of glue and RFID antenna, formation moisture absorption layer, glue-line (or plastics
Layer) and RFID antenna layer capacitance structure, wherein the moisture absorption of RFID antenna layer is lower, and during glue-line (or plastic layer) is sandwiched in
Between, the dielectric coefficient of the two is smaller by influence of moisture；And moisture absorption layer itself belongs to a kind of and easy to moisture absorption takes off wet stock, and position and product knot
The side of the partially close measured body of structure, the humidity vulnerable to measured body influences and dielectric coefficient is caused to change, with this characteristic as perception
Basis.
Embodiment 1
As shown in Fig. 2, a kind of RFID tag with humidity function, including the RFID antenna being made of antenna and chip
Layer, RFID antenna layer are equipped with moisture absorption layer, and moisture absorption layer forms capacitive junctions by the way that glue-line (or plastic layer) is be bonded with RFID antenna layer
The lower section of structure, RFID antenna layer is equipped with lower fitting glue-line, and wherein moisture absorption layer can print pattern and character or maintain blank.
Embodiment 2
As shown in figure 3, a kind of RFID tag with humidity function, including the RFID antenna being made of antenna and chip
Layer, RFID antenna layer are equipped with moisture absorption layer, and moisture absorption layer forms capacitive junctions by the way that glue-line (or plastic layer) is be bonded with RFID antenna layer
Structure, the top of moisture absorption layer are equipped with upper fitting glue-line (the incomplete covering absorbent layer of glue-line), are attached to object on one side be bonded glue-line
On make moisture absorption layer close to affixed object, can print pattern and character on the outside of RFID antenna layer or maintain blank.
Embodiment 3
As shown in figure 4, a kind of RFID tag with humidity function, including the RFID antenna being made of antenna and chip
Layer, RFID antenna layer are equipped with moisture absorption layer, and moisture absorption layer forms capacitive junctions by the way that glue-line (or plastic layer) is be bonded with RFID antenna layer
Structure, the top of moisture absorption layer are equipped with upper fitting glue-line, and being attached on object on one side of the above fitting glue-line makes moisture absorption layer close to affixed object,
In addition it is equipped with lower fitting glue-line in the lower section of RFID antenna layer, the one level material of sticker outside lower fitting glue-line can be on the outside of plane materiel
Print pattern text maintains blank.
A kind of RFID tag with humidity function, humidity principle are as follows: High-Polymer Capacitance formula wet sensitive group
As shown in figure 5, dielectric coefficient and humidity are to be positively correlated, capacitor and humidity are also positive for the capacitance of part and the relationship of relative humidity
It closes.
C =εA/d；Wherein, C is capacitor, and ε is dielectric coefficient, and A is laminate area, the distance that d is two layers.
Capacitor and antenna impedance are proportional to -1/w C, and wherein w is frequency, and C is capacitor.
Such as chip output impedance is that (preceding paragraph is real part resistance, and consequent is imaginary part reactance, then designing for 10-j × 245
Antenna reaches optimum resonance efficiency, then needs the input impedance of Antenna Design for 10+j × 245, the anti-conjugate impedance match of formation group,
Resonance effect is better, and electromagnetic wave energy transmission efficiency is better, so sensitivity is higher.
Using with measurement sensitivity, read away from, or can the RFID reader of modulation power threshold values tested, can be sequentially
Emit 1dB, 2dB, 3dB ... 20dB, 21dB ... 29dB, 30dB ..., RFID tag response can be made by finding
Minimum emissive power, as sensitivity obtain humidity according to the humidity and the sensitivity table of comparisons and interpolation calculation of correction.
Claims (4)
1. a kind of RFID tag with humidity function, including the RFID antenna layer being made of antenna (3) and chip (4)；
It is characterized by: the RFID antenna layer is equipped with moisture absorption layer (1), the moisture absorption layer (1) passes through glue-line (2) and RFID antenna layer
Bonding forms capacitance structure.
2. a kind of RFID tag with humidity function according to claim 1, it is characterised in that: the moisture absorption layer
(1) top is equipped with upper fitting glue-line (6).
3. a kind of RFID tag with humidity function according to claim 1, it is characterised in that: described RFID days
The lower section of line layer is equipped with lower fitting glue-line (5).
4. a kind of RFID tag with humidity function according to claim 3, it is characterised in that: the lower fitting
The lower section of glue-line (5) is equipped with facestock layer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810710919.8A CN108985430A (en) | 2018-07-03 | 2018-07-03 | A kind of RFID tag with humidity function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810710919.8A CN108985430A (en) | 2018-07-03 | 2018-07-03 | A kind of RFID tag with humidity function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108985430A true CN108985430A (en) | 2018-12-11 |
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ID=64539814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810710919.8A Withdrawn CN108985430A (en) | 2018-07-03 | 2018-07-03 | A kind of RFID tag with humidity function |
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| CN (1) | CN108985430A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946341A (en) * | 2019-03-18 | 2019-06-28 | 上海珈羽国际贸易有限公司 | A kind of passive and wireless perspiration state-detection sensing textile label for clothing |
| CN110399965A (en) * | 2019-07-31 | 2019-11-01 | 永道射频技术股份有限公司 | A kind of RFID label construction for heating or processing in micro-wave oven |
| WO2021099265A1 (en) * | 2019-11-20 | 2021-05-27 | B-Horizon GmbH | Measuring system for measuring pressure and/or humidity based on ambient humidity |
| CN114444635A (en) * | 2022-02-08 | 2022-05-06 | 河南工业大学 | Prediction method and system of grain moisture content and temperature based on RFID tags |
-
2018
- 2018-07-03 CN CN201810710919.8A patent/CN108985430A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946341A (en) * | 2019-03-18 | 2019-06-28 | 上海珈羽国际贸易有限公司 | A kind of passive and wireless perspiration state-detection sensing textile label for clothing |
| CN110399965A (en) * | 2019-07-31 | 2019-11-01 | 永道射频技术股份有限公司 | A kind of RFID label construction for heating or processing in micro-wave oven |
| CN110399965B (en) * | 2019-07-31 | 2023-05-30 | 永道射频技术股份有限公司 | RFID label structure for heating or processing in microwave oven |
| WO2021099265A1 (en) * | 2019-11-20 | 2021-05-27 | B-Horizon GmbH | Measuring system for measuring pressure and/or humidity based on ambient humidity |
| CN114444635A (en) * | 2022-02-08 | 2022-05-06 | 河南工业大学 | Prediction method and system of grain moisture content and temperature based on RFID tags |
| CN114444635B (en) * | 2022-02-08 | 2023-10-17 | 河南工业大学 | Method and system for predicting grain water content and temperature based on RFID (radio frequency identification) tag |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181211 |
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| WW01 | Invention patent application withdrawn after publication |