CN106650879A - Intelligent RFID tag and working method thereof - Google Patents
Intelligent RFID tag and working method thereof Download PDFInfo
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- CN106650879A CN106650879A CN201611199752.0A CN201611199752A CN106650879A CN 106650879 A CN106650879 A CN 106650879A CN 201611199752 A CN201611199752 A CN 201611199752A CN 106650879 A CN106650879 A CN 106650879A
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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
- G06K19/0716—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 at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
- G06K19/0717—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 at least one of the integrated circuit chips comprising a sensor or an interface to a sensor the sensor being capable of sensing environmental conditions such as temperature history or pressure
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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
- G06K19/0701—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 at least one of the integrated circuit chips comprising an arrangement for power management
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention discloses an intelligent RFID tag and a working method thereof. The intelligent RFID tag comprises an RFID tag chip, an MCU, a sensor and an electric energy conversion circuit, wherein the RFID tag chip is used for performing switching in a charging mode or a food information acquisition mode under the control of the MCU; the sensor is used for obtaining a state of a food; the electric energy conversion circuit is used for charging the intelligent RFID tag; the RFID tag chip is connected with the electric energy conversion circuit and the MCU; and the MCU is further connected with the sensor and the electric energy conversion circuit. According to the intelligent RFID tag and the working method, the quality state of the food can be obtained in real time, so that the reliability of RFID tag reading and writing is ensured in an internal environment of food storage, the service life of an active RFID tag is prolonged, and the cost is reduced.
Description
Technical field
The present invention relates to intelligent home device technical field, more particularly to a kind of intelligent RFID tag and its method of work.
Background technology
At present intelligent refrigerator product is more uses RFID tag as refrigerator food intelligent management technological means, wherein
RFID is the abbreviation of Radio Frequency Identification, and Chinese translation is RF identification.But RFID tag is in reality
In the application process of border, some shortcomings are still suffered from：
（1）Passive RFID tags can only simply infer food preserving status information according to the temporal information of write label in advance,
The quality state of food can not in real time be obtained；
（2）Passive RFID tags need RFID tag read write line to provide energy to activate, and have one to the RF signal intensitys of read write line
Provisioning request, and change frequently in refrigerator inside article and read and write for guarantee passive RFID tags under the irregular complex environment of placement
The reliability of operation needs to improve RF signal intensitys and increases the quantity of refrigerator body internal RF antenna, so as to result in product
The increase of cost；And battery is used as the active RFID tag of power supply, because of RFID tag volume, the restriction battery capacity of structure
It is less, the service life of RFID tag is greatly reduced, and because the internal battery for carrying may after label reaches service life
Problem of environmental pollution can be brought.
Therefore the passive RFID tags of refrigerator food of the prior art can not in real time obtain the quality state of food, and
Passive RFID tags need to improve RF signal intensitys, and product cost is big, and active RFID tag, and service life is short, is that user obtains
The safe condition for taking refrigerator food brings inconvenience.
Therefore, prior art has yet to be improved and developed.
The content of the invention
In view of the deficiencies in the prior art, present invention aim at providing a kind of intelligent RFID tag and its method of work, purport
The passive RFID tags of refrigerator food can not in real time obtain the quality state of food in prior art is solved, and be that user obtains ice
The safe condition of case food brings the technical problem of inconvenience.
Technical scheme is as follows：
A kind of intelligent RFID tag, wherein, the intelligent RFID tag includes that RFID label chip, MCU, sensor, electric energy turn
Change circuit, the RFID label chip is used to be carried out in charge mode or food information drainage pattern under the control of the MCU
Switching；The sensor is used to obtain the state of food；The electric energy conversion circuit is used to enter for the intelligent RFID tag
Row charges；The RFID label chip is connected respectively with the electric energy conversion circuit, the MCU；The MCU also respectively with it is described
Sensor, electric energy conversion circuit connection.
Described intelligent RFID tag, wherein, the electric energy conversion circuit include RF antennas, resonance circuit, rectification circuit,
Accumulator, the RF antennas are used to receive the charging signals that the RFID label chip sends；The resonance circuit is used to connect
Receive and produce resonance after unloaded ripple, induced voltage is produced according to resonance；The rectification circuit is used for what the resonance circuit was produced
Voltage carries out boosting rectification；The accumulator is used to store electric energy；The RF antennas, the resonance circuit, the rectified current
Road, the accumulator are sequentially connected.
Described intelligent RFID tag, wherein, the sensor is smell sensor, for obtaining the abnormal smells from the patient number of food
According to.
Described intelligent RFID tag, wherein, the smell sensor is based on the electrochemistry odor sensing of silk screen printing
Device.
Described intelligent RFID tag, wherein, two interfaces are provided with the RFID label chip, it is respectively that IIC connects
Mouth and RF interfaces, the IIC interfaces are used to be operated in charge mode under the control of the MCU, and the RF interfaces are used in institute
Food information drainage pattern is operated under the control for stating MCU.
A kind of method of work of intelligent RFID tag, wherein, method includes step：
Whether the current electric quantity of A, MCU detection electric energy conversion circuit is less than the power threshold of a setting；
If the current electric quantity of B, electric energy conversion circuit is less than the power threshold of a setting, MCU control RFID label chip work
It is charged under charge mode until the current electric quantity of electric energy conversion circuit is not less than the power threshold of a setting；
If C, the current electric quantity of electric energy conversion circuit are not less than the power threshold of a setting, MCU control RFID label chip works
Make in food information drainage pattern, RFID label chip obtains sensor acquisition food state and stores, and the food that will be stored
State is sent to RFID tag read write line.
The method of work of described intelligent RFID tag, wherein, step B specifically includes step：
If, less than the power threshold of a setting, RFID label chip sends charging please for the current electric quantity of B1, electric energy conversion circuit
Ask；
B2, RFID tag read write line response charge request, MCU controls RFID label chip is operated under charge mode and is charged
Until the current electric quantity of electric energy conversion circuit is not less than the power threshold of a setting.
The method of work of described intelligent RFID tag, wherein, step C specifically includes step：
If C1, the current electric quantity of electric energy conversion circuit are not less than the power threshold of a setting, MCU control RFID label chip works
Make in food information drainage pattern, RFID tag is obtained after the food smell collection request that RFID tag read write line sends, activation
Smell sensor；
C2, smell sensor gather food smell information according to sampling time interval, and the food smell information of collection is sent
To RFID label chip；
C3, RFID label chip storage food smell information, food smell information is sent to RFID tag read write line.
The method of work of described intelligent RFID tag, wherein, step is also included before step A：
S, MCU pre-set the sampling time interval of smell sensor.
The method of work of described intelligent RFID tag, wherein, step B2 specifically includes step；
B21, RFID tag read write line are received after charge request and send a RF zero load ripple to electric energy conversion circuit；
RF zero load ripples are changed into DC voltage and are charged current electricity until circuit conversion circuit by B22, electric energy conversion circuit
Amount is not less than the power threshold of a setting, and MCU controls RFID label chip and sends charge completion information to RFID tag read write line,
RFID tag read write line stops sending RF zero load ripples.
The invention provides a kind of intelligent RFID tag and its method of work, the quality shape that can in real time obtain food of the invention
State, so as under the internal medium of food storage, it is ensured that the reliability of RFID tag read-write, and improve active RFID tag
Service life, reduce cost.
Description of the drawings
Fig. 1 is a kind of functional schematic block diagram of the preferred embodiment of intelligent RFID tag of the present invention.
Fig. 2 is a kind of principle of work and power of the electric energy conversion circuit of the concrete application embodiment of intelligent RFID tag of the present invention
Block diagram.
Fig. 3 is that a kind of circuit of the electric energy conversion circuit of the concrete application embodiment of intelligent RFID tag of the present invention is illustrated
Figure.
Fig. 4 is a kind of flow chart of the preferred embodiment of the method for work of intelligent RFID tag of the present invention.
Fig. 5 is a kind of flow chart of the concrete application embodiment of the method for work of intelligent RFID tag of the present invention.
Specific embodiment
To make the purpose of the present invention, technical scheme and effect clearer, clear and definite, below to the present invention further specifically
It is bright.It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
The invention provides a kind of functional schematic block diagram of the preferred embodiment of intelligent RFID tag, as shown in figure 1, intelligence
RFID tag includes RFID label chip 100, MCU200, sensor 300, electric energy conversion circuit 400, RFID label chip 100
For switching in charge mode or food information drainage pattern under the control of MCU200, sensor 300 is used to obtain food
The state of product, electric energy conversion circuit 400 be used for be charged for intelligent RFID tag, RFID label chip 100 respectively with electric energy
Conversion circuit 400, MCU200 connects, and MCU200 is also connected with sensor 300, electric energy conversion circuit 400 respectively.
Specifically, intelligent RFID tag is placed on the ad-hoc location of refrigerator, for obtaining the state of food.Specifically, use
Family can by rfid interrogator read and write intelligent RFID tag in data, so as to obtain refrigerator in food state.Intelligent RFID
Label with several parts such as RFID label chip, super low-power consumption MCU, sensor, electric energy conversion circuits by constituting.Main devices are all
Select the product type of super low-power consumption：Super low-power consumption MCU selects TI（Texas Instrument）The MSP430F1222 chips of company, work
Voltage 1.8-3.6V, standby current only needs 0.7uA.
Intelligent RFID tag operation principle：MCU timed activation sensor acquisition food informations, and RFID label chip is cut
IIC patterns are changed to, the designated memory space of the information Store for collecting to RFID label chip, afterwards again by RFID tag core
Piece is switched to RF patterns, and RFID tag read write line is spaced according to set time timing and reads correspondence storage sky in RFID label chip
Between information, obtain the quality state information of food that intelligent RFID tag is followed.The electricity of MCU real-time monitorings electric energy conversion simultaneously
The voltage on road, asks when finding that the threshold value for being less than setting then actively sends to charge by RFID label chip to RFID tag read write line
Information, RFID tag read write line is asked to receive and send after charge request information RF zero load ripples, intelligent RFID tag receives unloaded ripple simultaneously
DC voltage is converted into by electric energy conversion circuit to charge, MCU passes through RFID label chip to RFID tag after charging is finished
Read write line sends charge completion information.
Further, as shown in Fig. 2 electric energy conversion circuit 400 includes RF antennas 401, resonance circuit 402, rectification circuit
403rd, accumulator 404, RF antennas 401 are used to receive the charging signals that RFID label chip 100 sends, and resonance circuit 402 is used
Produce resonance after unloaded ripple in receiving, induced voltage is produced according to resonance, rectification circuit 403 is used for the electricity produced to resonance circuit
Pressure carries out boosting rectification, and accumulator 404 is used to store electric energy, RF antennas 401, resonance circuit 402, rectification circuit 403, energy storage
Circuit 404 is sequentially connected.Electric energy conversion circuit use discrete diode, capacity cell, and using Large Copacity super capacitor as
Energy-storage travelling wave tube, specification is 5.0V/5.0F.Convert electrical energy into it is circuit integrated on RFID food labellings, under MCU controls realize from
Electrokinetic energy is supplemented.Current passive RFID tag is solved under complex environment inside refrigerator cold closet plastic in order to improve RFID tag read-write
Device and reliability that label is communicated need higher RF signal intensitys and in the more RF of the different angles of refrigerator inside, location arrangements
Antenna, so as to the problem that the difficulty and cost that cause structure design are dramatically increased；Solve active RFID tag to power using battery
Short life, label scraps the problem of rear its internal battery meeting environmental pollution.Wherein RF is the contracting of Radio Freqency
Write, Chinese meaning is less radio-frequency.RF antennas are radio-frequency antenna.
Further, the circuit diagram of circuit conversion circuit, as shown in figure 3, front end is RF antennas, not shown in Fig. 3.
Wherein part 1 is LC resonance circuits, and part 2 is voltage doubling rectifing circuit, and third portion is accumulator.
The operation principle of electric energy conversion circuit is：
When MCU detects energy storage deficiency, control RFID label chip sends charge request and after meeting with a response by RFID tag
Chip is switched to RF patterns, and RFID tag read write line sends the unloaded ripple of 13.5MHz, and L, C are produced in LC resonance circuits, such as Fig. 3
Resonance, according to resonance induced voltage is produced, and RFID label chip is not responded to unloaded ripple.The electric energy that RF antennas are received only has mV
Rank, it is therefore desirable to carry out to be charged to accumulator after boosting rectification.MCU in intelligent RFID tag, smell sensor,
RFID label chip only needs reliably working by 2 ~ 3V voltages, therefore using two grades of multiplication of voltages, C1, D1, C2, the D2 in such as Fig. 3 is
Requirement can be met, charge can to after voltage multiplying rectifier filtering the super capacitor CF of energy storage.
Sensor is smell sensor, for obtaining the odor data of food, so as to according to the acquisition of smell sensor
Odor data judges dietary regimen.Can all there is the change of form or abnormal smells from the patient when generally food will go bad, be passed using abnormal smells from the patient herein
Sensor carries out obtaining the abnormal smells from the patient of food.Smell sensor is based on the electrochemistry smell sensor of silk screen printing.Because of silk screen printing
Electrode it is cheap, therefore reduce the cost of RFID tag.Preferably, smell sensor selects SPEC-SENSORS companies
Low-power consumption silk-screen electrochemistry smell sensor 3SP_H2S_50, power consumption only 50uW.Silk-screen electrochemistry smell sensor is integrated
To on intelligent RFID tag, food smell information is realized in switching to RFID label chip between IIC and RF patterns under MCU controls
Real-time Collection and report.Solving current passive RFID tag can only simply judge according to the temporal information of write label in advance
Food preserving status information, and cannot in real time know the problem of the quality state of food.
Two interfaces are provided with RFID label chip, are respectively IIC interfaces and RF interfaces, IIC interfaces are used for MCU's
Charge mode is operated under control, RF interfaces are used to be operated in food information drainage pattern under the control of MCU.The RFID of interface
Label chip selects ST（STMicw Electronics）The M24LR16E-R chips of company, the chip has IIC and RF double nips, Ke Yi
The lower switch mode of MCU controls carries out more flexible application.Wherein IIC is Inter-Integrated Circuit (integrated circuits
Bus）.RF interfaces are Radio Freqency radio frequency interfaces,（Also RF interfaces, coaxial cable interface, closed circuit line interface are）Category
In analog signal interface.
Present invention also offers a kind of flow chart of the preferred embodiment of the method for work of intelligent RFID tag, such as Fig. 4 institutes
Show, method includes：
Whether the current electric quantity of step S100, MCU detection electric energy conversion circuit is less than the power threshold of a setting, if setting less than one
Fixed power threshold, then execution step S200, if being not less than the power threshold of a setting, execution step S300；
Step S200, MCU control RFID label chip is operated under charge mode and is charged working as until electric energy conversion circuit
Front electricity is not less than the power threshold of a setting；
Step S300, MCU control RFID label chip is operated in food information drainage pattern, and RFID label chip obtains sensor
Collection food state is simultaneously stored, and the food state of storage is sent to RFID tag read write line.
When being embodied as, intelligent RFID tag has electric energy conversion circuit in step S100, using the teaching of the invention it is possible to provide labeling task institute
Reliably working by MCU, smell sensor, RFID label chip only need 2 ~ 3V voltages in power supply smart RFID tag is needed, therefore
As 2 ~ 3V, preferred power threshold is 2V to the power threshold scope for setting.
In step S200, when the threshold value less than setting is found, RFID label chip is converted to charging mould in the presence of MCU
Formula, after the carrier wave for obtaining RFID tag read write line, is converted into DC voltage and charges, until electric energy by electric energy conversion circuit
The current electric quantity of conversion circuit is not less than complete charge after the power threshold of a setting.
If being not less than the power threshold of a setting in step S300, wherein food drainage pattern refers to that RFID label chip is first
IIC type collection food patterns are first operated in, then the food pattern of collection are sent to RF tag read-write equipments by RF patterns.
Further, RFID label chip is switched to IIC patterns by MCU, and MCU control sensors obtain food state, what is collected
RFID label chip is switched to RF patterns by the storage of food state again afterwards to the designated memory space of RFID label chip,
RFID tag read write line is spaced according to set time the information that correspondence memory space in RFID label chip is read in timing, obtains intelligence
The quality state information of the food that energy RFID tag is followed.
In further embodiment, step is also included before step S100：
Step S1, MCU pre-sets the sampling time interval of smell sensor.
When being embodied as, smell sensor can save sensor every odiferous information of acquisition time interval collection
Electricity, while decreasing the volume of transmitted data of real-time data collection.Wherein acquisition time interval is pre-set by MCU.Adopt
One kind in collection time interval optional 10min, 20min, 30min.
In further embodiment, step S200 is specifically included：
If step S201, the current electric quantity of electric energy conversion circuit send less than the power threshold of a setting, RFID label chip
Charge request；
Step S202, RFID tag read write line response charge request, MCU controls RFID label chip is operated under charge mode
Row charges until the current electric quantity of electric energy conversion circuit is not less than the power threshold of a setting.
When being embodied as, when the threshold value for finding to be less than setting is then by RFID label chip actively to RFID tag read write line
Charge request information is sent, RFID tag read write line is received and respond after charge request information charge request transmission carrier information, intelligence
Can charge into charge mode after RFID tag carrier information, until the current electric quantity of electric energy conversion circuit is not less than setting
Power threshold.
In further embodiment, step S202 is specifically included：
Step S221, RFID tag read write line are received after charge request and send a RF zero load ripple to electric energy conversion circuit；
RF zero load ripples are changed into DC voltage and are charged working as until circuit conversion circuit by step S222, electric energy conversion circuit
Front electricity is not less than the power threshold of a setting, and MCU controls RFID label chip and sends charging complete to RFID tag read write line
Information, RFID tag read write line stops sending RF zero load ripples.
When being embodied as, RFID tag read write line receives the RF zero load ripples that 13.5MHz is sent after charge request information, intelligence
RFID tag zero load ripple is simultaneously converted into DC voltage charging by electric energy conversion circuit, and MCU passes through after charging is finished
RFID label chip to RFID tag read write line sends charge completion information.
In further embodiment, step S300 is specifically included：
If step S301, the current electric quantity of electric energy conversion circuit are not less than the power threshold of a setting, MCU control RFID tags
In food information drainage pattern, RFID tag obtains the food smell collection request that RFID tag read write line sends to chip operation
Afterwards, smell sensor is activated；
Step S302, smell sensor gather food smell information according to sampling time interval, and the food smell of collection is believed
Breath is sent to RFID label chip；
Step S303, RFID label chip storage food smell information, food smell information is sent to RFID tag read write line.
When being embodied as, when the current electric quantity for finding electric energy conversion circuit then passes through RFID tag core less than the threshold value of setting
Piece actively sends charge request information to RFID tag read write line, and RFID tag read write line received and sent after charge request information
The RF zero load ripples of 13.5MHz, intelligent RFID tag receives unloaded ripple and is converted into DC voltage by electric energy conversion circuit and charges,
MCU sends charge completion information by RFID label chip to RFID tag read write line after charging is finished.
In further embodiment, in the present invention a kind of concrete application of the method for work of intelligent RFID tag is additionally provided
Embodiment, wherein sensor are smell sensor, as shown in figure 5, method includes：
Step S10, initialization；
Step S20, MCU detects the energy state of electric energy conversion circuit, if electric energy is sufficient, execution step S30；If electric energy is not
Foot, then execution step S40, wherein electric energy abundance refers to that current electric quantity is not less than power threshold set in advance, wherein electric energy not
Foot refers to that current electric quantity is less than power threshold set in advance；
Step S30, MCU normal mode of operation；
Step S31, judge whether to set acquisition time interval, if it is, execution step S32, if otherwise execution step
S30；
Step S32, judge whether to receive RFID tag read write line abnormal smells from the patient sample request, if it is, execution step S33, if
Otherwise execution step S30；
Step S33, activation smell sensor；
Step S34, collection food smell information；
Step S35, odiferous information storage are to RFID label chip；
Step S36, RFID tag read write line read odiferous information, afterwards execution step S20；
Step S40, RFID label chip send charge request；
Step S41, judge whether RFID tag read write line responds charge request, if it is, execution step S42, if otherwise
Execution step S20；
Step S42, enter charge mode；
Step S43, whether complete, if it is, execution step S20, if otherwise execution step S42 if judging to charge.
In sum, the present invention proposes a kind of intelligent RFID tag and its method of work, and intelligent RFID tag includes intelligence
Energy RFID tag includes RFID label chip, MCU, sensor, electric energy conversion circuit, and RFID label chip is used for the control in MCU
Switch in charge mode or food information drainage pattern under system,；Sensor is used to obtain the state of food；Electric energy conversion electricity
Road is used to be charged for intelligent RFID tag；RFID label chip is connected respectively with electric energy conversion circuit, MCU, and MCU also divides
It is not connected with sensor, electric energy conversion circuit.The present invention can in real time obtain the quality state of food, so as in food storage
Under portion's environment, it is ensured that the reliability of RFID tag read-write, and the service life of active RFID tag is improved, reduced into
This.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, and for those of ordinary skills, can
To be improved according to the above description or be converted, all these modifications and variations should all belong to the guarantor of claims of the present invention
Shield scope.
Claims (10)
1. a kind of intelligent RFID tag, it is characterised in that the intelligent RFID tag includes RFID label chip, MCU, sensing
Device, electric energy conversion circuit, the RFID label chip is used under the control of the MCU be gathered in charge mode or food information
Pattern is switched over,；The sensor is used to obtain the state of food；The electric energy conversion circuit is used for for the intelligence
RFID tag is charged；The RFID label chip is connected respectively with the electric energy conversion circuit, the MCU, and the MCU is also
It is connected with the sensor, the electric energy conversion circuit respectively.
2. intelligent RFID tag according to claim 1, it is characterised in that the electric energy conversion circuit include RF antennas,
Resonance circuit, rectification circuit, accumulator, the RF antennas are used to receive the charging signals that the RFID label chip sends；
The resonance circuit is used to receive produce resonance after unloaded ripple, and according to resonance induced voltage is produced；It is right that the rectification circuit is used for
The voltage that the resonance circuit is produced carries out boosting rectification；The accumulator is used to store electric energy；It is the RF antennas, described humorous
Shake circuit, the rectification circuit, the accumulator is sequentially connected.
3. intelligent RFID tag according to claim 2, it is characterised in that the sensor is smell sensor, is used for
Obtain the odor data of food.
4. intelligent RFID tag according to claim 3, it is characterised in that the smell sensor is based on silk screen printing
Electrochemistry smell sensor.
5. the intelligent RFID tag according to claim 1 claim, it is characterised in that set in the RFID label chip
Two interfaces are equipped with, are respectively IIC interfaces and RF interfaces, the IIC interfaces are used to be operated in charging under the control of the MCU
Pattern；The RF interfaces are used to be operated in food information drainage pattern under the control of the MCU.
6. a kind of method of work of intelligent RFID tag, it is characterised in that method includes step：
Whether the current electric quantity of A, MCU detection electric energy conversion circuit is less than the power threshold of a setting；
If the current electric quantity of B, electric energy conversion circuit is less than the power threshold of a setting, MCU control RFID label chip work
It is charged under charge mode until the current electric quantity of electric energy conversion circuit is not less than the power threshold of a setting；
If C, the current electric quantity of electric energy conversion circuit are not less than the power threshold of a setting, MCU control RFID label chip works
Make in food information drainage pattern, RFID label chip obtains sensor acquisition food state and stores, and the food that will be stored
State is sent to RFID tag read write line.
7. the method for work of intelligent RFID tag according to claim 6, it is characterised in that step B is specifically included
Step：
If, less than the power threshold of a setting, RFID label chip sends charging please for the current electric quantity of B1, electric energy conversion circuit
Ask；
B2, RFID tag read write line response charge request, MCU controls RFID label chip is operated under charge mode and is charged
Until the current electric quantity of electric energy conversion circuit is not less than the power threshold of a setting.
8. the method for work of intelligent RFID tag according to claim 7, it is characterised in that step C is specifically included
Step：
If C1, the current electric quantity of electric energy conversion circuit are not less than the power threshold of a setting, MCU control RFID label chip works
Make in food information drainage pattern, RFID tag is obtained after the food smell collection request that RFID tag read write line sends, activation
Smell sensor；
C2, smell sensor gather food smell information according to sampling time interval, and the food smell information of collection is sent
To RFID label chip；
C3, RFID label chip storage food smell information, food smell information is sent to RFID tag read write line.
9. the method for work of intelligent RFID tag according to claim 8, it is characterised in that also wrap before step A
Include step：
S, MCU pre-set the sampling time interval of smell sensor.
10. the method for work of intelligent RFID tag according to claim 7, it is characterised in that step B2 is specifically wrapped
Include step；
B21, RFID tag read write line are received after charge request and send a RF zero load ripple to electric energy conversion circuit；
RF zero load ripples are changed into DC voltage and are charged current electricity until circuit conversion circuit by B22, electric energy conversion circuit
Amount is not less than the power threshold of a setting, and MCU controls RFID label chip and sends charge completion information to RFID tag read write line,
RFID tag read write line stops sending RF zero load ripples.
Priority Applications (1)
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| CN201611199752.0A CN106650879A (en) | 2016-12-22 | 2016-12-22 | Intelligent RFID tag and working method thereof |
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| CN201611199752.0A CN106650879A (en) | 2016-12-22 | 2016-12-22 | Intelligent RFID tag and working method thereof |
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| CN201611199752.0A Pending CN106650879A (en) | 2016-12-22 | 2016-12-22 | Intelligent RFID tag and working method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113177625A (en) * | 2021-02-04 | 2021-07-27 | 上海爪字物联科技有限公司 | Method for detecting tearing of RFID (radio frequency identification) label and RFID chip |
| CN114548332A (en) * | 2022-02-08 | 2022-05-27 | 海信（山东）冰箱有限公司 | Label box and electronic label information copying method |
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