A kind of method for confirming electronic label identification state and its electronic tag used
Technical field
The invention belongs to technical field of RFID, is related to ultrahigh-frequency passive electronic tag recognition efficiency, recognition success rate
Problem.By the change of electronic tag state abstract factory surfacing color, identification (RFID) tag state is reached.
Background technology
Passive RF electronic tag itself does not have power supply, needs, by electromagnetic field Space Coupling, to obtain energy from electromagnetic field
Exchange is changed into dc source with the method for rectification, to activate chip internal circuits by amount.The data receiver and demodulation section of label
Dividing and command code and data being demodulated from the radio-frequency pulse for receiving, be sent to control module, control module is according to the finger for receiving
Order completes data storage, transmission or other operations.The mode of label returned data is the impedance by controlling antennal interface, by hindering
Resistanceization changes the reflectance factor of antenna, so as to complete to modulate to carrier signal.
Electronic tag in use, set up by electromagnetic field with label and contacted, the TID returned by label by card reader
Carry out identification.Especially in hyperfrequency application, communication distance is commonly used(4-8 rice), multi-tag(Dozens or even hundreds of
Label)Under, in card reader electromagnetic field, whether 100% identification completely is a difficult problem to label.Although by optimizing reader antenna
(Multiple antennas prevent dead angle), improve tag sensitivity(Reduce electromagnetic field trough point label blind area), label 3D antennas(Avoid direction
Dead angle)Tag recognition rate is constantly lifted, but skip is still present, and changed with environmental change, had a strong impact on super
Application of the high-frequency label in terms of logistics, asset management.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of method for confirming identification state for electronic tag, conveniently looks for
To the label that does not check.
For solving above-mentioned technical problem, the present invention is adopted the following technical scheme that:A kind of confirmation electronic label identification state
Method, the method are changed by electronic tag surface color, and auxiliary confirms the identification state of label.
Further, the method is to be combined together voltage or temperature discoloring ink with electronic tag, by label
The state that whether is checked comes control voltage port or label temperature, so as to change the color of label surface color shifting ink, reaches
Purpose to identification (RFID) tag state.
Further, the change of the color on electronic tag surface represents identified state and unrecognized state respectively.
Further, while electronic tag completes interactive communication by electromagnetic field acquisition energy, by voltage-drop loading to electricity
On the contact of pressure or temperature discoloring ink, ink colors are directly changed by voltage-drop loading;Or changed by voltage x current
The temperature of label, changes the color of ink indirectly.
The present invention provides a kind of electronic tag, by chip, connecting line, base material, antenna, color shifting ink layer, film group of becoming attached to
Into;Described substrate surface is followed successively by antenna under upper, become attached to film and color shifting ink layer;Described chip includes radio frequency analog
Front-end module, digital state machine module and storage module;Described rf analog front-end module is provided with port RF1 and port
RF2;Described digital state machine module is provided with port V1, port V2;Port V1 and port V2 is by connecting line and discoloration oil
Layer of ink connects, and port RF1 and port RF2 is connected with two ports of antenna by connecting line;Described film of becoming attached to is arranged at day
Between line and color shifting ink layer.Antenna completes energy of electromagnetic field sensing, and rf analog front-end module realizes that signal energy is changed;Number
Word state machine module controls the flow direction of the state and inside tags data of label, according to the instruction for receiving, abstract factory
Changed between state, the content required for storing or returning;Memory module is used for storing user profile;When electronic tag is jumped
When going to the logic state or flag bit state specified, digital state machine control connects in port V1 and port V2 applied voltages
Connect color shifting ink layer;There is the change of color under the exciting of voltage in color shifting ink layer, or indirectly by port V1, port V2
Applied voltage changes the temperature of label surface, so that color shifting ink layer occurs color change.
Further, described color shifting ink layer is provided with two long arm of uniform slice, by long arm and port V1
Connect with port V2.
Beneficial effects of the present invention:The present invention on the basis of electronic label function feature is analyzed, by voltage(Temperature)Become
Color ink is combined together with electronic tag, the state control voltage port that whether is checked by label or label temperature,
So as to change the color of label surface ink, so as to reach identification (RFID) tag state.When multi-tag is recognized, by the face of label itself
Color change confirms to read success rate with assistive reading device;When success rate does not reach 100%, the mark that does not check can be conveniently found
Sign.
Description of the drawings
Fig. 1 is the electronic tag schematic diagram of the present invention.
Fig. 2 is electronic tag state machine transition diagram.
Specific embodiment
Whether voltage or temperature discoloring ink are combined together by the method for the present invention with electronic tag, by label
The state that is checked comes control voltage port or label temperature, so as to change the color of label surface color shifting ink, reaches mark
Know the purpose of tag state.While electronic tag completes interactive communication by electromagnetic field acquisition energy, by voltage-drop loading to electricity
Cause the color on the contact of off-color material, electrochromic material directly being changed by voltage-drop loading;Or changed by voltage x current
Become the temperature of label, change indirectly the color of electrochromic material.
A kind of electronic tag of the present invention, by chip, reinforcing wire, base material, antenna, conductive color shifting ink layer, film group of becoming attached to
Into;Described substrate surface sets gradually antenna under upper, become attached to film and color shifting ink layer;Described chip includes radio frequency mould
Intend front-end module, digital state machine module and storage module;Described rf analog front-end module is provided with port RF1;Described
Digital state machine module be provided with port V1, port V2 and port RF2;Port V1 and port V2 is by connecting line and discoloration oil
Layer of ink connects, and port RF1 and port RF2 is connected with two ports of antenna by connecting line;Described film of becoming attached to is arranged at day
Between line and color shifting ink layer;Antenna completes energy of electromagnetic field sensing, and rf analog front-end module realizes that signal energy is changed;Number
Word state machine module controls the flow direction of the state and inside tags data of label, according to the instruction for receiving, abstract factory
Changed between state, the content required for storing or returning;Memory module is used for storing user profile;When electronic tag is jumped
When going to the logic state or flag bit state specified, digital state machine control connects in port V1 and port V2 applied voltages
Connect color shifting ink layer;There is the change of color under the exciting of voltage in color shifting ink layer, or indirectly by port V1, port V2
Applied voltage changes the temperature of label surface, so that color shifting ink layer occurs color change.
The color shifting ink layer of the present invention is provided with two long arm of uniform slice, by long arm and port V1 and port V2
Connection, voltage are formed than more uniform electric field in color shifting ink layer.
When the radiofrequency field that label is formed in reader, label and card reader interactive communication.Tag state is with interaction
Order and change.Label is elected from a pile label through select command, inquiry command, anti-collision order, confirmation order,
After label example, label returns to card reader PC+UII+CRC16 in the case where state is confirmed.
Now label read by standby being designated, and tag indicator position becomes ' 1 ' by ' 0 ', to represent and inquire the cycle in epicycle
In, label has been asked and has completed.After the completion of tag recognition, as label is also in radio frequency electromagnetic field, now label passes through
Electromagnetic field is converted into voltage output to V1, V2 port by radio circuit(Color shifting ink contact), by two uniform slice elongateds
Arm is connected to electrically conductive ink two ends.Ink color under the change of electric field or temperature that applied voltage is formed becomes from a kind of color
Into another kind of color.
When color can be recognized as multi-tag, a kind of supplementary means of skip detection.Check when multi-tag and occur in that Lou
During reading, the label that does not distinguish is found out, can only be checked one by one under normal circumstances.Electric field that ink is formed in applied voltage or
Under the change of temperature, color becomes the label that another kind of color easily chooses skip from a kind of color, facilitates answering for electronic tag
With.
Embodiment described above is only that the preferred embodiment of the present invention is described, the not design to the present invention
It is defined with scope, on the premise of without departing from design concept of the present invention, in this area, ordinary skill technical staff is to this
The various modifications and improvement that bright technical scheme is made all should fall into protection scope of the present invention, the skill being claimed of the present invention
Art content, has all been documented in technical requirements book.