CN206322210U - A kind of Anti-theft card being lost based on passive energy - Google Patents
A kind of Anti-theft card being lost based on passive energy Download PDFInfo
- Publication number
- CN206322210U CN206322210U CN201621429693.7U CN201621429693U CN206322210U CN 206322210 U CN206322210 U CN 206322210U CN 201621429693 U CN201621429693 U CN 201621429693U CN 206322210 U CN206322210 U CN 206322210U
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- China
- Prior art keywords
- circuit
- card
- write line
- read write
- antenna
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of Anti-theft card being lost based on passive energy, including card body and the coil antenna and radio circuit being arranged in the card body, wherein：The coil antenna is used for the signal for receiving read write line transmitting, and the radio circuit includes inductive circuit, voltage rectifying circuit, shunt-resonant circuit and energy loss circuit：The antenna of the read write line sends and sensed and received by the coil antenna by inductive circuit after carrier signal, matched then in turn through the rectification circuit and shunt-resonant circuit, be then passed through the energy loss circuit and filter the carrier signal with modulation intelligence.Energy loss circuit in the utility model, the carrier signal with modulation intelligence is filtered, so that the bank card around Anti-theft card cannot respond to the radio frequency induction of read write line, from being read.
Description
Technical field
The utility model is related to bank's Anti-theft card field, and in particular to a kind of Anti-theft card being lost based on passive energy.
Background technology
RFID is Radio Frequency Identification abbreviation, i.e. REID.RFID radio frequencies are known
It is not a kind of contactless automatic identification technology, it is by radiofrequency signal automatic identification destination object and obtains related data,
Recognize that work, without manual intervention, is operable with various adverse circumstances.
One basic radio-frequency recognition system includes three below part：(1) it is used for launching and receiving the read-write of RF signals
Device (Reader), the equipment for reading label information, can be with external antenna, for sending and receiving radiofrequency signal, some readers
Information data can be write to electronic tag；(2) electronic tag (Tag) of testee relevant information, electronic tag one are loaded with
As also turn into transponder, be the device for being used for data storage and information in RFID system, electronic tag is mainly by antenna and mark
Label chip (being made up of control module and memory cell) is constituted；(3) antenna (including reading and writing device antenna and the label of transmission RF signals
Antenna).
Read write line is mainly the generation high-frequency emission power, right of read write line rf analog front-end to electronic label read-write process
Transmission signal is modulated, energy and data are provided for passive electronic label, is demodulated reception signal.Read write line will need
The pulse signal of transmission, after being encoded through systems soft ware, is loaded by the carrier signal of specific frequency, then outside by antenna
Send.After electronic tag receives pulse signal in read write line working range, the antenna front ends circuit of electronic tag will
Pulse signals are modulated, decode, decrypted, and then the information decrypted is judged.If it is determined that read command, then mark
Control circuit in label will read the information of storage among tag ram, first pass around encryption, then encoded, adjusted
After system, then read write line is transmitted to by the antenna in label, then read write line by the signal received carry out detection, amplification,
After filtering, deliver to control system decoded, decryption processing；If it is determined that be the writing commands of modification information, inside tags
Control logic circuit will lift operating voltage by internal charge pump, and then the information data stored in electronic tag is entered
Row modification.
Based on the characteristic of RFID noncontact automatic identifications, bank card has released the function of contactless small amount payment, full
Foot efficiently, easily pays application.While giving people to bring convenience, there is security hidden trouble, stolen brush, bank easily occur
The problems such as card information is divulged a secret.Bank card electronic tag is operated in 13.56Mhz working frequency, read distance 0~10mm with
Interior, bank card is typically stored in inside wallet, when read-write equipment close to when still can read bank card information, at present
Seldom effective device can shield bank card and surprisingly be read, and can be placed in wallet, protect multiple bank cards.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and the present invention provides a kind of based on passive energy
The antitheft card taking of loss, shield effectiveness is good, occupies little space, can be effectively protected bank card and be read.
To reach above-mentioned purpose, the technical solution adopted in the utility model is as follows：A kind of preventing based on passive energy loss
Card, including card body and the coil antenna and radio circuit being arranged in the card body are stolen, wherein：
The coil antenna is used for the signal for receiving read write line transmitting, and it is whole that the radio circuit includes inductive circuit, voltage
Current circuit, shunt-resonant circuit and energy loss circuit：
The inductive circuit is made up of one group of coiling, alternating magnetic field, read-write for coupling reading and writing device antenna generation
The frequency and Q value coefficients of device antenna are so as to match the antenna of read write line, while according to the law of electromagnetic induction, friendship is produced in coil
Time variant voltage；
The rectification circuit：The alternating voltage that inductive circuit is produced, rectification forms dc source；
The shunt-resonant circuit：The shunt-resonant circuit can make the increase of electric current suitably, and tuning induces larger
Voltage；
The energy loss circuit：The carrier signal with modulation intelligence that read write line can be sent is filtered；
The antenna of the read write line sends and sensed and received by the coil antenna by inductive circuit after carrier signal, so
After sequentially pass through the rectification circuit and shunt-resonant circuit is matched, being then passed through the energy loss circuit will be with adjusting
The carrier signal of information processed is filtered, so that the bank card around Anti-theft card cannot respond to the radio frequency induction of read write line, from being read
Take.
Preferably, the read write line launches signal by crystal oscillating circuit.
Preferably, the signal that the read write line is sent is 13.56Mhz high-frequency signal.
Preferably, the card body is shaped as cuboid.
Preferably, the dimensions of the card body is consistent with the PVC smart card length and width of standard, and thickness is higher than standard
PVC smart card.
The beneficial effects of the utility model：The read write line of bank card launches high frequency by crystal oscillating circuit in the utility model
Signal, when the coil antenna of Anti-theft card senses the magnetic field of reading and writing device antenna, has induced-current generation, electric current passes through Anti-theft card
Interior energy loss circuit, the carrier signal with modulation intelligence is filtered, so that the bank card around Anti-theft card cannot respond to
The radio frequency induction of read write line, from being read.
Brief description of the drawings
Fig. 1 is a kind of overall structure diagram for the Anti-theft card being lost based on passive energy of the utility model.
Fig. 2 is a kind of schematic block circuit diagram for the Anti-theft card being lost based on passive energy of the utility model.
Fig. 3 is a kind of circuit theory of the middle energy loss circuit for the Anti-theft card being lost based on passive energy of the utility model
Figure.
Embodiment
Embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
Referring to shown in Fig. 1-3, a kind of Anti-theft card being lost based on passive energy, including card body 1 and be arranged on described
Coil antenna 2 and radio circuit 3 in card body, the card body 1 are shaped as cuboid, the chi of the card body
Very little specification is consistent with the PVC smart card length and width of standard, and thickness is higher than the PVC smart card of standard, wherein：
The coil antenna is used for the signal for receiving read write line transmitting, and the read write line launches letter by crystal oscillating circuit
Number, the signal that the read write line is sent is 13.56Mhz high-frequency signal.
The radio circuit includes inductive circuit, voltage rectifying circuit, shunt-resonant circuit and energy loss circuit：It is described
Inductive circuit is made up of one group of coiling, for couple reading and writing device antenna generation alternating magnetic field, reading and writing device antenna frequency
With Q value coefficients so as to match the antenna of read write line, while inductive circuit is according to the law of electromagnetic induction, alternation electricity is produced in coil
Pressure；The rectification circuit：The alternating voltage that inductive circuit is produced, rectification forms dc source；The shunt-resonant circuit：Institute
The increase of electric current suitably can be made by stating shunt-resonant circuit, and tuning induces larger voltage；The energy loss circuit：Can be by
(ripple that crystal oscillating circuit is produced before is the carrier of signal, read write line core to the carrier signal with modulation intelligence that read write line is sent
The high-frequency signal of piece transmitting is useful signal) filtered；The antenna of the read write line is sent after carrier signal by inductance electricity
Road is sensed and received by the coil antenna, is matched, connect then in turn through the rectification circuit and shunt-resonant circuit
And filter the carrier signal with modulation intelligence by the energy loss circuit, so that the bank card around Anti-theft card can not
The radio frequency induction of read write line is responded, (i.e. energy losser circuit falls bank card energy loss, the bank card on periphery from being read
Because energy is not enough and can not work, read write line can not just obtain bank card information).
The utility model also has the characteristics that：
1. under the size cases for being no more than standard size antenna, the signal of the sensing read write line of maximum possible；2. no matter prevent
What steal on the direction that card is placed, the polarization of antenna can match with the inquiry signal of read write line；3. with robustness；4. make
For loss part, the price of antenna must be very cheap；5. the higher quality factor of antenna, its value is higher, the electric current in coil
Will be bigger, so can more effective transimission power.
Cardinal principle of the present utility model is as follows：
RFID (Radio Frequency Identification) system realize information exchange be by be wirelessly transferred come
Realize, it is to realize that information is exchanged by electromagnetic induction to be wirelessly transferred.In wireless world, for radiating and receiving radio wave
Device be referred to as antenna, antenna is transmission radio wave most effective way.RFID antenna is the crucial composition portion of RFID system
Point, read write line can give label emitted energy and signal by RFID antenna, while the answer signal of label can also be received, it is antitheft
The purpose of card is to carry out consumption to the energy and signal of the transmitting of read write line RFID antenna to filter, so as to reach the effect of shielding.
Under normal circumstances, the AFE(analog front end) transmission signal of read write line：The carrier wave of 13.56Mhz frequencies is produced by crystal oscillator first
Signal, then enters modulation chip with having finished the baseband signal of code, carries out ASK modulation, then passes through pre-amplification circuit
Baseband modulation signal is amplified, to ensure the requirement of rf power amplifier circuit input signal, then amplification signal is passed through into radio frequency
Power amplifier carries out power amplification, is then launched signal by antenna, the electronic tag (bank around such read write line
Card) it can just work.
And bank card is a kind of passive RFID electronic label, it induces what read write line was launched by the label antenna of itself
Radiofrequency signal produces the power supply of whole chip operation, and read write line is by antenna to the strong-electromagnetic field for around launching high frequency, transmitting
A part of magnetic line of force in magnetic field to pass through and induce alternating voltage on the coil antenna of Anti-theft card of the present utility model.
When the coil antenna of antitheft card taking of the present utility model senses the magnetic field of reading and writing device antenna, induced electricity miscarriage is had
Raw, electric current passes through energy loss circuit, and energy loss is fallen, and at this moment the bank card on periphery can not work because of energy deficiency,
Read write line can not just obtain bank card information.
Anti-theft card Match circuits of the present utility model：As the rectification circuit in Fig. 2 and shunt-resonant circuit are completed
Match circuit, rectification circuit can concentrate energy, and it can be the power supply being subsequently lost to be converted to, and shunt-resonant circuit is that passband is special
Property, it is capable of the carrier signal after the transmission modulation of maximal efficiency, the complex impedance of antenna is at this moment transformed to true impedance, that is, allows antenna
Show pure resistance characteristic.
The energy loss design of Anti-theft card of the present utility model：Coil antenna is sensed after energy, through over commutation, resonance
Matching, is sent to the numerical portion processing of electronic tag, is parsed for chip internal under normal circumstances.One has been designed here
Energy loss circuit, filters the carrier signal of read write line, so that the bank card around antitheft card taking cannot respond to read write line
Radio frequency induction, from being read.
The announcement and teaching of book according to the above description, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and changed.Therefore, the utility model is not limited to embodiment disclosed and described above, right
Some modifications and changes of utility model should also be as falling into scope of the claims of the present utility model.Although in addition,
Some specific terms have been used in this specification, but these terms are merely for convenience of description, not to the utility model structure
Into any limitation.
Claims (5)
1. a kind of Anti-theft card being lost based on passive energy, it is characterised in that including card body and being arranged on the card sheet
Internal coil antenna and radio circuit, wherein：
The coil antenna is used for the signal for receiving read write line transmitting, and the radio circuit includes inductive circuit, voltage commutation electricity
Road, shunt-resonant circuit and energy loss circuit：
The inductive circuit is made up of one group of coiling, alternating magnetic field, read write line day for coupling reading and writing device antenna generation
The frequency and Q value coefficients of line are so as to match the antenna of read write line, while according to the law of electromagnetic induction, alternation electricity is produced in coil
Pressure；
The rectification circuit：The alternating voltage that inductive circuit is produced, rectification forms dc source；
The shunt-resonant circuit：The shunt-resonant circuit can make the increase of electric current suitably, and tuning induces larger electricity
Pressure；
The energy loss circuit：The carrier signal with modulation intelligence that read write line can be sent is filtered；
The antenna of the read write line sends and sensed and received by the coil antenna by inductive circuit after carrier signal, Ran Houyi
Secondary to be matched by the rectification circuit and shunt-resonant circuit, being then passed through the energy loss circuit will be with modulation letter
The carrier signal of breath is filtered.
2. a kind of Anti-theft card being lost based on passive energy as claimed in claim 1, it is characterised in that the read write line passes through
Crystal oscillating circuit launches signal.
3. a kind of Anti-theft card being lost based on passive energy as claimed in claim 2, it is characterised in that the read write line is sent
Signal be 13.56Mhz high-frequency signal.
4. a kind of Anti-theft card being lost based on passive energy as claimed in claim 1, it is characterised in that the card body
It is shaped as cuboid.
5. a kind of Anti-theft card being lost based on passive energy as claimed in claim 4, it is characterised in that the card body
Dimensions is consistent with the PVC smart card length and width of standard, and thickness is higher than the PVC smart card of standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621429693.7U CN206322210U (en) | 2016-12-25 | 2016-12-25 | A kind of Anti-theft card being lost based on passive energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621429693.7U CN206322210U (en) | 2016-12-25 | 2016-12-25 | A kind of Anti-theft card being lost based on passive energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206322210U true CN206322210U (en) | 2017-07-11 |
Family
ID=59259075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621429693.7U Expired - Fee Related CN206322210U (en) | 2016-12-25 | 2016-12-25 | A kind of Anti-theft card being lost based on passive energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206322210U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114640377A (en) * | 2022-03-02 | 2022-06-17 | 维沃移动通信有限公司 | Entity card adding method, device, equipment and storage medium |
-
2016
- 2016-12-25 CN CN201621429693.7U patent/CN206322210U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114640377A (en) * | 2022-03-02 | 2022-06-17 | 维沃移动通信有限公司 | Entity card adding method, device, equipment and storage medium |
| CN114640377B (en) * | 2022-03-02 | 2023-08-15 | 维沃移动通信有限公司 | Entity card adding method, device, equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20191225 |