CN106979830A - Chipless RFID temperature threshold sensor, production method and temperature alarming device - Google Patents
Chipless RFID temperature threshold sensor, production method and temperature alarming device Download PDFInfo
- Publication number
- CN106979830A CN106979830A CN201710290203.2A CN201710290203A CN106979830A CN 106979830 A CN106979830 A CN 106979830A CN 201710290203 A CN201710290203 A CN 201710290203A CN 106979830 A CN106979830 A CN 106979830A
- Authority
- CN
- China
- Prior art keywords
- temperature
- sensor
- matrix
- elc
- rfid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/32—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using change of resonant frequency of a crystal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
-
- 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
Abstract
The invention discloses chipless RFID temperature threshold sensor, production method and temperature alarming device.It mainly includes matrix, and matrix surface is provided with ELC resonators, and ELC resonator surfaces are covered with the temperature-sensitive material layer that can occur solid-gas reaction.The temperature-sensitive material layer can be poor film.Its production method mainly includes a, selection matrix；B, matrix surface set ELC resonators；C, temperature-sensitive material is covered in ELC resonator surfaces；D, drying.Present invention cost simple in construction is low, and detecting distance is remote.Realize the low-cost wireless detection of temperature alarming information.By the sensitive thin-film material of more emat sensor, series of temperatures threshold sensor can be formed.Due to have the advantages that inexpensive, passive, chipless, can flexible printing, the prospect of this sensor is boundless, is particularly suitable for use in the Internet of Things developed rapidly at present.
Description
Technical field
The present invention relates to temperature sensor field, more particularly to chipless RFID temperature threshold sensor, production method and
Temperature alarming device.
Background technology
Developing rapidly for Internet of Things needs substantial amounts of inexpensive sensor.It is at most wired biography that current temperature detection, which is applied,
Sensor, with precision is high and the characteristics of high sensitivity, but complex manufacturing technology, simultaneously because needing to access peripheral circuit, make
The relatively large sized of detecting system is obtained, testing cost is high.On the other hand, because there is silicon the most inside of wired sensor
Chip so that sensor can not be worked under many harsh environmental conditions, such as superhigh temperature, ultralow temperature, strong acid alkaline environment.
In order to solve the problems of wired sensor presence, at present, wireless temperature detection technique is being researched and developed in this area.
For example,《Sensor technology》2002 phases in the end of the year volume 21 the 4th disclosed《The wireless temperature of passive sonic surface wave resonator
Sensor-based system》, its characteristic progress wireless temperature inspection being affected by temperature using surface wave propagation speed resonator geometric parameter
Survey.Although this technology can carry out wireless temperature detection, it needs to be produced on piezoelectric ceramics matrix, matrix inflexibility and
Frangible, manufacture craft needs to use the microelectronic techniques such as photoetching, vacuum coating, and complex process, cost is high, and its working frequency range is big
Generally in 87MHz-108MHz, detecting distance is shorter, is only suitable for short distance detection.
For another example, Chinese patent 201610436065X discloses a kind of integrated temperature sensor in an rfid tag.It will
Temperature sensor completely integrated shares together with other modules of RFID label chip multiple moulds into the chip of RFID tag
Block circuit (including counter, oscillator, RFID tag clock, digital control circuit and load modulation circuit etc.).This temperature
Sensor is disadvantageous in that the modular circuit of its application is excessive, and complex manufacturing, cost is of a relatively high, is not easy to big rule
Mould is promoted the use of, and is not suitable for using under harsh environment.
Chinese patent 2016105101949 discloses a kind of multilayer inductor passive and wireless LC temperature sensors, and it includes temperature
The LC resonant tanks that quick inductance and electric capacity are constituted, the temperature sensitive inductance includes the detection inductance of N layer stackups, each detection inductance series connection
Cover plate, the detection inductance bottom of the bottom are equipped between connection, adjacent two layers detection inductance and at the top of the detection inductance of top
Portion is provided with substrate；Every layer of detection induction structure is identical, including inductance mould, and inductance mould is spiral-shaped groove, groove
Inside it is marked with liquid metal alloy formation spiral inductance；Groove is interior, liquid metal alloy upper surface forms metal oxide conformal layer,
Height of the metal oxide conformal layer in groove is less than the height of groove upper surface；Electric capacity in LC resonant tanks is by adjacent
Parasitic capacitance in parallel between two layers of detection inductance matter is constituted.The deficiency that the sensor is present is：Its principle is complex, leads
Cause its structure still complex, manufacture craft requires higher.Cause its final cost still higher.
Why complicated above-mentioned various sensors are, and cost is high, mainly due to the influence of its design concept.It considers
Factor include to detect that different temperatures and the sensor are wanted to be recycled for multiple times by a kind of sensor.This design is thought
Road results in existing various temperature sensors, and its is complicated, and cost is high.And at present under some Special use environment, it is necessary to
It is that the sensor that can detect specific threshold temperature can meet demand, after temperature reaches threshold values, is capable of detecting when to touch
Send out alarm, it is not necessary to can detect and show various temperature, be recycled for multiple times.Such as, when transporting explosives,
As long as temperature control is below threshold values, it is not necessary to temperature is detected and shown in real time, when temperature rises to threshold values
When can trigger alarm and alarmed.It can thus be seen that under this application scenario, it is not necessary to complicated, cost
High temperature sensor.Because existing radio temperature sensor cost is still higher, so it is difficult to large-scale promotion is used.And
Internet of Things field is again very urgent to the demand of inexpensive temperature sensor, so, develop meet the demand cost it is low,
The temperature sensor of simple production process seems very necessary.
The content of the invention
Passed present invention solves the technical problem that being to provide chipless RFID temperature threshold a kind of simple in construction and low cost
Sensor.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of chipless RFID temperature threshold sensor, including matrix, matrix surface are provided with ELC resonators, ELC resonance
Device surface is covered with the temperature-sensitive material layer that can occur solid-gas reaction.
It is further that the temperature-sensitive material layer is poor film.
It is further that described matrix is flexible substrate or rigid matrix.
Present invention also offers a kind of temperature alarming device, including above-mentioned chipless RFID temperature threshold sensor, also
Including RFID card reader, the RFID card reader is used for sensor emission electromagnetic wave and receives reverse electromagnetic wave, and RFID is read
Card device is connected with detection process module, and detection process module is connected with alarm module, and detection process module is used to detect that RFID is read
The offset of resonant frequency in the frequency spectrum for the electromagnetic wave that card device is received, when offset is more than or equal to preset value, detection process mould
Block starts alarm module.
It is further that the temperature-sensitive material layer is poor film.
It is further that described matrix is flexible substrate or rigid matrix.
Present invention also offers the production method of above-mentioned chipless RFID temperature threshold sensor, it is specially：
A, selection matrix；
B, matrix surface set ELC resonators；
C, temperature-sensitive material is covered in ELC resonator surfaces；
D, drying.
It is further that during the temperature-sensitive material is luxuriant and rich with fragrance powder, step c, first luxuriant and rich with fragrance powder is placed in tetrahydrofuran solution,
Luxuriant and rich with fragrance powder is completely dissolved by magnetic agitation at 60 DEG C, is dried in step d at 40 DEG C.
It is further that in step a, described matrix is rigid matrix or flexible substrate.
Inventive sensor structure special is electrically coupled LC resonators (ELC resonators, electric-LC using a kind of
Resonator), have the advantages that small volume, resonance quality factor are high, resonator resonance is in uhf band, centre frequency
2.45GHz.One layer of thermally sensitive organic material phenanthrene (Phenanthrene, C are coated in ELC resonator surfaces14H10).It is luxuriant and rich with fragrance
It is a kind of sublimation substance with polynucleation hydrocarbon group, directly can be converted into gas phase from solid phase, and does not suffer from interstage liquid phase.
Distillation is the phase transformation of a heat absorption, and luxuriant and rich with fragrance enthalpy of phase change is 90.5K J mol-1, phase transition temperature is about 72 DEG C.The resonance of resonator is special
Property influenceed by the characteristic of poor film, the compound dielectric that both constitute structure be determine resonant frequency a principal element.
When the broadband electromagnetic wave irradiation that RFID card reader is sent is to sensor, because sensor has excellent resonance
Performance, will absorb the electromagnetic wave of specific frequency so that the backscattering wave spectrum signature that card reader is received changes, mainly
It is embodied in the amplitude and phase of resonant frequency point.When dut temperature is higher than 72 DEG C, sensitive material film is luxuriant and rich with fragrance will distillation, sensing
The dielectric constant of device is produced and sharply increased, and then resonant frequency is produced obvious change, by detecting that card reader is received instead
Into the frequency spectrum of electromagnetic wave, whether resonant frequency offsets, and the detection to temperature threshold can be achieved.
The beneficial effects of the invention are as follows：Cost simple in construction is low, and detecting distance is relatively far away from.Realize temperature alarming information
Low-cost wireless detection.By the sensitive thin-film material of more emat sensor, series of temperatures threshold sensor can be formed.The present invention
Available for supply chain management, in the storage and transportation of some chemicals, medicine or explosive etc., it is not necessary to lasting inspection
Testing temperature, and the threshold point of a temperature is concerned with, when test environment temperature is higher than threshold temperature, alarm signal will be sent
Breath.Particularly, with the development of printing technology and material technology, sensor can make flexibility or can be by printing device
Printing on the wrapper, is directly affixed on the surface of transport parcel.Due to inexpensive, passive, chipless, can flexible printing etc.
Advantage, the prospect of this sensor is boundless, is particularly suitable for use in the Internet of Things developed rapidly at present.
Brief description of the drawings
Fig. 1 is sensor of the invention section of structure
Fig. 2 is ELC resonator structure figures in sensor of the invention.
Fig. 3 is the equivalent circuit diagram of ELC resonators in sensor of the invention.
Fig. 4 is the preparation flow figure of temperature sensitive thin film in sensor of the invention.
Fig. 5 is the schematic diagram of the detecting system of sensor of the invention.
Fig. 6 is the test result figure of sensor of the invention.
Fig. 7 is the schematic diagram of the temperature alarming device of the present invention.
Marked in figure：Temperature-sensitive material 1, ELC of layer resonators 2, matrix 3, electromagnetic wave transmitting antenna 4, sensor 5,
Electromagnetic wave reception antenna 6, vector network analyzer 7.
Embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
RFID temperature threshold sensor construction profiles are as shown in Figure 1.In figure matrix 3 can select FR4 copper-clad plates,
The flexible base board such as rigid substrates or PVC, wrapping paper such as Taconic TLX_8 copper-clad plates；Black portions are metal levels, for being formed
ELC resonators 2, remaining copper conductive layer after the layer is wet etching when using copper-clad plate, during using flexible base board, the layer can be
The conductive silver slurry layer that mode of printing is realized.Dash area is the temperature-sensitive material layer 1 for being coated in metallic resonator structure surface,
Film is such as belittled, other ion plastic crystals can also be used.
Fig. 2 is ELC resonator structure figures in RFID sensor.The structure has following two advantages：In nature, because
With supernormal medium characteristic, make it be more easy to realize miniaturized structure and good resonance characteristic, be conducive to improving sensor performance；
From structure, its simple in construction and high degree of symmetry, design is simple.Its main structure parameters is divided into inductance parameters and electric capacity ginseng
Number：Capacitance parameter includes electric capacity upper/lower electrode line width g1, gap gCWith electric capacity length LC；Inductance parameters include inductive length L, width
Spend W and line width d1。
After the excitation of electromagnetic wave on its surface, the strong coupling of structure for providing electric capacity is used for positioned at centre by one for resonator
Electric field is closed, whole LC resonance circuits are driven；The loop configuration for being used to provide inductance positioned at both sides is because structure height symmetrically makes
Its magnetic coupling is very weak.
Design is optimized to ELC resonators by radio frequency simulation software HFSS, as a special case, following table gives matrix
Material is Taconic TLX_8 copper-clad plates, and resonant frequency is the structural parameters of 2.45GHz resonators.
Table 1
Fig. 3 is the equivalent circuit diagram of ELC resonators in RFID sensor of the present invention.Wherein electric capacity is made up of two parts：Cg
For the gap capacitance produced by upper/lower electrode in the middle of ELC resonators, born of the same parents when Cp is unit cell periodic arrangement produced by adjacent unit cell
Between electric capacity, the overall equivalent capacity of two parts is C.Inductance L is then the inductance produced by the inductive loop of two high degree of symmetry, the LC
The resonant frequency of antiresonant circuit can be calculated with formula (1).
The resonant frequency for understanding the resonator by upper equivalent-circuit model is influenceed by its equivalent capacitance value.The calculating of capacitance
Formula is shown in formula (2)：
In formula,It can be calculated and obtained by ELC resonator dependency structures parameter with L, εrefFor sensor base and temperature
Sensitive film constitutes the compound dielectric of structure, can be calculated by formula (3)：
εref=1+q1(εsub-1)+q2(εr-1) (3)
Wherein, εsubFor substrate relative dielectric constant, εrFor temperature sensitive film relative dielectric constant, q1And q2It is and resonator
The related constant of structural parameters.
When dut temperature changes, temperature sensitive film relative dielectric constant εrIt will change.When sensitive material takes phenanthrene, work as temperature
When degree is more than 72 DEG C, due to luxuriant and rich with fragrance sublimation, film disappears, εrIt is reduced to the relative dielectric constant of air, causes εrefSubtract
Small, capacitance C reduces therewith in ELC resonators, finally resonant frequency is accordingly changed.By the change for detecting resonant frequency
Temperature threshold detection can be achieved.
As an application example, the preparation method of sensor of the invention introduced below, wherein the preparation of poor film can be joined
Fig. 4 is examined, Fig. 4 gives the preparation flow of the Sino-Philippines temperature sensitive thin film of RFID sensor of the present invention.Specifically include：
A, selection matrix.
B, matrix surface set ELC resonators.
C, first luxuriant and rich with fragrance powder is placed in tetrahydrofuran solution, wherein per the luxuriant and rich with fragrance powder of 100ml tetrahydrofuran solutions dissolving 1.78g, so
Luxuriant and rich with fragrance powder is completely dissolved by magnetic agitation at 60 DEG C afterwards, can be completely dissolved within general 20 minutes or so, then pass through drop coating
Solution is covered in ELC resonator surfaces by method.In addition, the conventional organic film such as spin-coating method, dip-coating method can also be used
Preparation method, for flexible substrate, can also use silk-screen printing or ink jet printing method, finally be covered in above-mentioned solution
ELC resonator surfaces.
D, the drying at 40 DEG C, general drying 2 hours.
Certain thickness poor film, such as 200um or so poor film can be formed in resonator surface by above method.
Analyzed more than, the technique used in the preparation method of sensor of the invention is all to compare in the prior art
Ripe technique, and these techniques are very easy, so as to ensure that the production efficiency and yield rate of sensor of the invention very
Height, and then make it that production cost is very low.Be conducive to a wide range of popularization and application in the existing Internet of Things developed rapidly.
If the application of temperature-sensitive material layer 1 is other materials, this hair can also be prepared with reference to above-mentioned preparation method
Bright sensor.
Fig. 5 is RFID sensor detecting system schematic diagram.Two box horns are respectively as the He of electromagnetic wave transmitting antenna 4
Electromagnetic wave reception antenna 6, two antennas are connected respectively on two ports of vector network analyzer 7, antenna distance label
Distance is more than more than 5cm.Sensor 5 is located on electromagnetic wave transmission path, can absorb the electromagnetic wave of resonant frequency point, makes receiving terminal
Receive the electromagnetic wave with resonance information.By the insertion loss (S in figure for detecting electromagnetic wave21), sensor can be obtained humorous
The rule that characteristic of shaking is varied with temperature.
Fig. 6 is that to apply example be RFID sensor test result figure to the present invention.When test temperature is 20 DEG C, the resonance of sensor
Frequency is 2.384GHz, when test temperature is 80 DEG C, the resonant frequency of sensor is 2.449GHz, frequency shift (FS) 65MHz,
Show that dut temperature exceedes threshold temperature.
Understand that sensor of the invention application is quite varied according to above-mentioned principles and methods, a kind of present invention introduced below
Sensor purposes.
As shown in fig. 7, the present invention, which can combine relevant device of the prior art, constitutes a kind of temperature alarming device.It includes
The chipless RFID temperature threshold sensor of the present invention, in addition to RFID card reader, the RFID card reader are used for sensor
Launch electromagnetic wave and receive reverse electromagnetic wave, RFID card reader is connected with detection process module, detection process module and alarm
Module is connected, the offset of resonant frequency in frequency spectrum of the detection process module for detecting the electromagnetic wave that RFID card reader is received,
Wherein, the frequency information of reading can be sent to detection process module by RFID card reader by radio receiving transmitting module, when offset is big
When equal to preset value, detection process module starts alarm module, and detection process module can be PC or SCM system etc..
, can be by the sensing of the present invention when transporting explosives by taking the sensor that the above-mentioned poor film of the present invention is made as an example
Device is attached to the surface of shell of explosives.After the temperature of explosives exceedes 72 DEG C of threshold temperature, film distillation, ELC are belittled
Capacitance C reduces therewith in resonator, finally resonant frequency is accordingly changed, RFID card reader can pass through radio receiving transmitting module
The frequency information of reading is sent to detection process module, the offset that detection process module now detects frequency is more than or equal in advance
If value, such as Fig. 6 frequency offsets 65MHz, 65MHz can serve as preset value.Then alarm module alarm is started, for example
Sound and light alarm.Related personnel's explosives can be so pointed out to play pendulum, it is necessary to take emergency measures.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (9)
1. a kind of chipless RFID temperature threshold sensor, it is characterised in that including matrix, matrix surface is provided with ELC resonance
Device, ELC resonator surfaces are covered with the temperature-sensitive material layer that can occur solid-gas reaction.
2. chipless RFID temperature threshold sensor as claimed in claim 1, it is characterised in that the temperature-sensitive material layer
To belittle film.
3. chipless RFID temperature threshold sensor as claimed in claim 1, it is characterised in that described matrix is flexible substrate
Or rigid matrix.
4. temperature alarming device, it is characterised in that including the chipless RFID temperature threshold sensor described in claim 1, also
Including RFID card reader, the RFID card reader is used for sensor emission electromagnetic wave and receives reverse electromagnetic wave, and RFID is read
Card device is connected with detection process module, and detection process module is connected with alarm module, and detection process module is used to detect that RFID is read
The offset of resonant frequency in the frequency spectrum for the electromagnetic wave that card device is received, when offset is more than or equal to preset value, detection process mould
Block starts alarm module.
5. temperature alarming device as claimed in claim 4, it is characterised in that the temperature-sensitive material layer is poor film.
6. temperature alarming device as claimed in claim 4, it is characterised in that described matrix is flexible substrate or rigid matrix.
7. the production method of the chipless RFID temperature threshold sensor described in claim 1, it is characterised in that including：
A, selection matrix；
B, matrix surface set ELC resonators；
C, temperature-sensitive material is covered in ELC resonator surfaces；
D, drying.
8. production method as claimed in claim 7, it is characterised in that during the temperature-sensitive material is luxuriant and rich with fragrance powder, step c, first
Luxuriant and rich with fragrance powder is placed in tetrahydrofuran solution, luxuriant and rich with fragrance powder is completely dissolved by magnetic agitation at 60 DEG C, is dried in step d at 40 DEG C
It is dry.
9. production method as claimed in claim 7, it is characterised in that in step a, described matrix is rigid matrix or flexible base
Body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710290203.2A CN106979830A (en) | 2017-04-28 | 2017-04-28 | Chipless RFID temperature threshold sensor, production method and temperature alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710290203.2A CN106979830A (en) | 2017-04-28 | 2017-04-28 | Chipless RFID temperature threshold sensor, production method and temperature alarming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106979830A true CN106979830A (en) | 2017-07-25 |
Family
ID=59342461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710290203.2A Pending CN106979830A (en) | 2017-04-28 | 2017-04-28 | Chipless RFID temperature threshold sensor, production method and temperature alarming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106979830A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019174097A1 (en) * | 2018-03-16 | 2019-09-19 | 无锡市好达电子有限公司 | Surface acoustic wave material and manufacturing method thereof |
| CN112381199A (en) * | 2020-10-22 | 2021-02-19 | 上海中卡智能卡有限公司 | Disposable passive RFID tag for temperature detection |
| WO2022113553A1 (en) * | 2020-11-25 | 2022-06-02 | コニカミノルタ株式会社 | Sensor tag, and state detecting system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383020A (en) * | 2008-10-14 | 2009-03-11 | 厦门大学 | Environment sensitive type passive electronic label |
| CN203606038U (en) * | 2013-10-11 | 2014-05-21 | 中国电子科技集团公司第五十五研究所 | Surface-acoustic-wave temperature-sensing responder |
| CN104990638A (en) * | 2015-06-30 | 2015-10-21 | 深圳华远微电科技有限公司 | Chip based on wireless temperature sensor |
| CN105067133A (en) * | 2015-08-26 | 2015-11-18 | 中北大学 | Wireless high-temperature temperature sensor and manufacturing method thereof |
| US20170046610A1 (en) * | 2015-08-12 | 2017-02-16 | Bgt Materials Limited | Printed radio frequency sensor structure and a method of preparing a RFID sensor tag |
| CN106485308A (en) * | 2015-09-01 | 2017-03-08 | Bgt材料有限公司 | Printing radio frequency sensor structure and the method for preparing radio frequency identification sensor label |
-
2017
- 2017-04-28 CN CN201710290203.2A patent/CN106979830A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383020A (en) * | 2008-10-14 | 2009-03-11 | 厦门大学 | Environment sensitive type passive electronic label |
| CN203606038U (en) * | 2013-10-11 | 2014-05-21 | 中国电子科技集团公司第五十五研究所 | Surface-acoustic-wave temperature-sensing responder |
| CN104990638A (en) * | 2015-06-30 | 2015-10-21 | 深圳华远微电科技有限公司 | Chip based on wireless temperature sensor |
| US20170046610A1 (en) * | 2015-08-12 | 2017-02-16 | Bgt Materials Limited | Printed radio frequency sensor structure and a method of preparing a RFID sensor tag |
| CN105067133A (en) * | 2015-08-26 | 2015-11-18 | 中北大学 | Wireless high-temperature temperature sensor and manufacturing method thereof |
| CN106485308A (en) * | 2015-09-01 | 2017-03-08 | Bgt材料有限公司 | Printing radio frequency sensor structure and the method for preparing radio frequency identification sensor label |
Non-Patent Citations (1)
| Title |
|---|
| NEMAI CHANDAR KARMAKAR 等: "《CHIPLESS RFID SENSORS》", 31 January 2016 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019174097A1 (en) * | 2018-03-16 | 2019-09-19 | 无锡市好达电子有限公司 | Surface acoustic wave material and manufacturing method thereof |
| CN112381199A (en) * | 2020-10-22 | 2021-02-19 | 上海中卡智能卡有限公司 | Disposable passive RFID tag for temperature detection |
| CN112381199B (en) * | 2020-10-22 | 2024-03-22 | 上海中卡智能卡有限公司 | Disposable passive RFID tag for temperature detection |
| WO2022113553A1 (en) * | 2020-11-25 | 2022-06-02 | コニカミノルタ株式会社 | Sensor tag, and state detecting system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Feng et al. | Low-cost printed chipless RFID humidity sensor tag for intelligent packaging | |
| Karmakar et al. | Chipless RFID sensors | |
| Fernandez-Salmeron et al. | HF RFID tag as humidity sensor: Two different approaches | |
| Virtanen et al. | Inkjet-printed humidity sensor for passive UHF RFID systems | |
| Yao et al. | Far-field interrogation of microstrip patch antenna for temperature sensing without electronics | |
| CN106979830A (en) | Chipless RFID temperature threshold sensor, production method and temperature alarming device | |
| Virtanen et al. | Printed humidity sensor for UHF RFID systems | |
| Sample et al. | Photovoltaic enhanced UHF RFID tag antennas for dual purpose energy harvesting | |
| Chang et al. | Functional antenna integrated with relative humidity sensor using synthesised polyimide for passive RFID sensing | |
| Preradovic et al. | Chipless RFID tag with integrated sensor | |
| Ferrer-Vidal et al. | Integration of sensors and RFID's on ultra-low-cost paper-based substrates for wireless sensor networks applications | |
| CN105427570A (en) | Passive and wireless telemetering interface chip for general reactance-type sensing element | |
| GB2466269A (en) | System and method for remote reading of resonant sensors | |
| Yang et al. | Design and development of RFID and RFID-enabled sensors on flexible low cost substrates | |
| Viikari et al. | Wireless ferroelectric resonating sensor | |
| Costa et al. | Wireless detection of water level by using spiral resonators operating in sub-GHz range | |
| Cheng et al. | A novel multiresonant chipless RFID tag for directional strain measurement on metal surface | |
| Chompoosawat et al. | Single-layer chipless RFID sensor for metal crack detection | |
| Habib et al. | A low-profile FSS-based high capacity chipless RFID tag for sensing and encoding applications | |
| Martuza et al. | Wireless LC-type passive humidity sensor using large-area RF magnetron sputtered ZnO films | |
| US20110121083A1 (en) | Device having an rfid transponder in an electrically conductive object and method for producing said device | |
| Virili et al. | 7.5–15 MHz organic frequency doubler made with pentacene-based diode and paper substrate | |
| Kou et al. | Highly sensitive air-filled substrate integrated waveguide resonator integrated wireless passive slot-antenna for confined environmental detection | |
| CN205486713U (en) | General reactance type is passive antenna telemetering measurement interface chips for sensing element | |
| US20130341415A1 (en) | Wireless ic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170725 |