CN206594222U - A kind of device for differentiating the IC-card true and false - Google Patents
A kind of device for differentiating the IC-card true and false Download PDFInfo
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- CN206594222U CN206594222U CN201720211478.8U CN201720211478U CN206594222U CN 206594222 U CN206594222 U CN 206594222U CN 201720211478 U CN201720211478 U CN 201720211478U CN 206594222 U CN206594222 U CN 206594222U
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Abstract
A kind of device for differentiating the IC-card true and false, including：IC-card read write line with antenna, for reading IC-card；Small voltage amplifier, input is connected with the antenna of IC-card read write line, in the driving voltage signal of antenna end during reception Card Reader, is amplified；Bridge rectifier, input is connected with the output end of small voltage amplifier, and the voltage signal of alternation is converted into d. c. voltage signal；Master control borad, is connected with the output end of bridge rectifier, receives d. c. voltage signal and is AD converted, obtains driving voltage V and associated with card number, is compared with the signal of storage, if signal is consistent, and discriminating is true card, such as inconsistent, then differentiates as pseudo- card；LCD display, is connected with master control borad, shows identification result, and the utility model is acquired by the driving voltage signal produced in card reader antenna to every IC-card, quantified and record storage, have effectively achieved and puppet card is differentiated.
Description
Technical field
The utility model belongs to electronic security(ELSEC) and technical field of RFID, more particularly to a kind of dress for differentiating the IC-card true and false
Put.
Background technology
IC-card is widely used in all trades and professions of society, such as all-in-one campus card, access card, elevator card, bank card.But,
Nowadays some criminals are replicated by any special measures to IC-card, are carried out unlawful activities using copy card, are given people
Safety of life and property causes huge potential safety hazard.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of discriminating IC-card true and false
Device, by signal acquisition device, obtains IC-card voltage signal, then using the signal, and carrying out discriminating with the signal that prestores sentences
It is disconnected, former card and copy card can be identified, with reliability it is high, it is applied widely the characteristics of.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of device for differentiating the IC-card true and false, including：
IC-card read write line 5 with antenna, for reading IC-card；
Small voltage amplifier 1, input is connected with the antenna of IC-card read write line 5, swashing in antenna end when receiving Card Reader
Voltage signal is encouraged, is amplified；
Bridge rectifier 2, input is connected with the output end of small voltage amplifier 1, by the voltage signal of alternation
Be converted to d. c. voltage signal；
Master control borad 3, is connected with the output end of bridge rectifier 2, receives d. c. voltage signal and is AD converted, is swashed
Encourage voltage V and associated with card number, is compared with the signal of storage, if signal is consistent, discriminating is true card, such as inconsistent,
Then differentiate as pseudo- card；
LCD display 4, is connected with master control borad 3, shows identification result.
Above-mentioned IC-card read write line 5, small voltage amplifier 1 and bridge rectifier 2 constitute IC-card of the present utility model
Signal acquisition device, there is provided judged to master control borad 3 by master control borad 3 for voltage signal when it is used to obtain Card Reader.
The IC-card read write line 5 is provided with neck in aerial position, it is ensured that every time when swiping the card and the relative position of IC-card is solid
Fixed.
The antenna of the IC-card read write line 5 is connected with the Europe potentiometers of 3296W-100 10, and it is calibrated.
The model RC522 of IC-card read write line 5.
The core devices of small voltage amplifier 1 use AD620, can carry out 1000 times to millivolt level alternating current-direct current signal
Amplification.
The master control borad 3 is communicated by network interface with background data base 6, by the IC-card driving voltage V collected
Stored with card number to database, when differentiating, information inquiry is carried out in background data base 6 by card number.
The utility model additionally provides a kind of method that device using the discriminating IC-card true and false differentiates the IC-card true and false：
Before the use, the initial voltage value on the antenna of read write line 5 is calibrated by potentiometer, it is ensured that all Card Readers
The antenna initial voltage value initial voltage value of device 5 is consistent；
The driving voltage signal in the antenna end of IC-card read write line 5 is received using small voltage amplifier 1, is amplified, profit
Driving voltage signal is converted into direct current signal by alternating signal with bridge rectifier 2, master control borad 3 carries out the direct current signal
AD conversion, obtains nondimensional signal u, and the signal u obtained before swiping the card value is designated as u0, by the signal u's obtained when swiping the card
Value is designated as u1, and the common mode disturbances caused by harvester difference are removed by u1-u0, and result is designated as into V, and V is IC-card pair
The driving voltage of antenna, and V values are not by IC-card read write line 5, small voltage amplifier 1 and the hardware differences of bridge rectifier 2
Influence, it is unrelated with acquisition platform, it is only relevant with the difference of IC-card；
The driving voltage V that master control borad is obtained when neocaine is swiped the card first is designated as V0, and is associated with card number, is stored in back-end data
Storehouse 6；
When swiping the card again, driving voltage V will be obtained and be designated as V1 and associated with card number, with background data base 6 card swash
Encourage voltage V0 to be compared, if data are consistent, discriminating is true card, such as inconsistent, then differentiates as pseudo- card.
Compared with prior art, the beneficial effects of the utility model are：When the utility model is swiped the card by gathering IC-card
The driving voltage produced in IC-card card reader antenna assists to judge the true and false of IC-card, because the various factors such as production technology cause
The obtained driving voltage V of every IC-card is different, and driving voltage V value random distribution, so reliability is high, cracks difficulty
Degree is big, and copy card is differentiated so as to have effectively achieved, the security of IC-card is improved.
Brief description of the drawings
Fig. 1 is hardware block diagram of the present utility model.
Fig. 2 is workflow diagram of the present utility model.
Embodiment
Describe embodiment of the present utility model in detail with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of device for differentiating the IC-card true and false, includes IC-card read write line 5, IC-card read write line 5 and master control
Plate 3 is connected；The input of small voltage amplifier 1 is connected with the antenna of IC-card read write line 5, the input of bridge rectifier 2 with it is micro-
The output end of small voltage amplifier 1 is connected, and the output end of bridge rectifier 2 is connected with master control borad 3.Master control borad 3 and LCD shows
Display screen 4 is connected, and is shown the true and false result of IC-card when swiping the card.IC-card read write line 5 is provided with neck in aerial position, it is ensured that
Relative position during each Card Reader between IC-card and card reader is fixed.What master control borad 3 can export bridge rectifier 2
Voltage signal is AD converted, and is obtained driving voltage V and is associated with card number.Master control borad 3 can pass through network interface and rear number of units
Communicated, the IC-card driving voltage V collected and card number are stored to database, it is possible to by card number on backstage according to storehouse 6
Database carries out information inquiry.
The model RC522 of IC-card read write line 5, its antenna is connected with the Europe potentiometers of 3296W-100 10, can carry out school to it
It is accurate.
Small voltage amplifier core devices described in described small voltage amplifier 1 use AD620, can be to millivolt level
Alternating current-direct current signal carries out 1000 times of amplification.
As shown in Figure 2：A kind of to differentiate the method for the IC-card true and false, different manufacturers, different batches, the IC-card of different model exists
When IC-card read write line 5 carries out swiping card, the voltage signal magnitude encouraged in antenna receiving terminal is different, passes through small voltage
The voltage signal of the antenna receiving terminal of IC-card read write line 5 is acquired and amplified by amplifier 1, by the signal output after amplification to bridge
Formula rectification circuit 2；
Bridge rectifier 2 is responsible for the alternating signal received being converted to d. c. voltage signal and exported to master control borad 3.
The direct current signal is AD converted by master control borad 3, obtains nondimensional signal u, the signal u's obtained before swiping the card
Value is designated as u 0, and the signal u obtained when swiping the card value is designated as into u1, is removed by u1-u0 caused by harvester difference
Common mode disturbances, will obtain result and are designated as V, V is driving voltage of the IC-card to antenna, and V values are not by IC-card read write line 5, small electric
The influence of amplifier 1 and the hardware differences of bridge rectifier 2 is pressed, it is unrelated with acquisition platform, it is only relevant with the difference of IC-card.
The driving voltage V that master control borad is obtained when neocaine is swiped the card first is designated as V0, and is associated with card number, is stored in back-end data
Storehouse 6；
When swiping the card again, driving voltage V will be obtained and be designated as V1 and associated with card number, with the card in background data base (6)
Driving voltage V0 is compared, if data are consistent, and discriminating is really to block, such as inconsistent, then differentiates as puppet card and shown in LCD
Shown on screen 4.
Card number that master control borad 3 reads IC-card card reader is to ensure in card inside information with driving voltage V associated storages
While correct, IC-card is also former card.
Referring to Fig. 2, workflow of the present utility model is as follows：IC-card during being swiped the card by small voltage amplifier 1
The voltage signal of the antenna receiving terminal of read write line 5 is acquired and amplified, by the signal output after amplification to bridge rectifier 2；
Bridge rectifier 2 is responsible for the alternating signal received being converted to d. c. voltage signal and exported to master control borad 3；
The d. c. voltage signal that bridge rectifier 2 is exported is acquired and is AD converted by master control borad 3, obtains immeasurable
The signal u of guiding principle, the signal u obtained before swiping the card value is designated as u 0, and the signal u obtained when swiping the card value is designated as into u1, passed through
U1-u0 removes the common mode disturbances caused by harvester difference, will obtain result and is designated as V.
The driving voltage V that master control borad is obtained when neocaine is swiped the card first is designated as V0, and is associated with card number, is stored in back-end data
Storehouse 6；
When swiping the card again, driving voltage V will be obtained and be designated as V1 and associated with card number, with the card in background data base (6)
Driving voltage V0 is compared, if data are consistent, and discriminating is really to block, such as inconsistent, then differentiates as puppet card and shown in LCD
Shown on screen 4.
Claims (5)
1. a kind of device for differentiating the IC-card true and false, it is characterised in that including：
IC-card read write line (5) with antenna, for reading IC-card；
Small voltage amplifier (1), input is connected with the antenna of IC-card read write line (5), swashing in antenna end when receiving Card Reader
Voltage signal is encouraged, is amplified；
Bridge rectifier (2), input is connected with the output end of small voltage amplifier (1), by the voltage signal of alternation
Be converted to d. c. voltage signal；
Master control borad (3), is connected with the output end of bridge rectifier (2), receives d. c. voltage signal and is AD converted；
LCD display (4), is connected with master control borad (3), shows identification result.
2. differentiate the device of the IC-card true and false according to claim 1, it is characterised in that the IC-card read write line (5) is in antenna
Position is provided with neck, it is ensured that every time when swiping the card and the relative position of IC-card is fixed.
3. differentiate the device of the IC-card true and false according to claim 1, it is characterised in that the antenna of the IC-card read write line (5)
Connected with the Europe potentiometers of 3296W-100 10, it is calibrated.
4. differentiate the device of the IC-card true and false according to claim 1, it is characterised in that IC-card read write line (5) model
RC522。
5. differentiate the device of the IC-card true and false according to claim 1, it is characterised in that small voltage amplifier (1) core
Heart device uses AD620, and 1000 times of amplification can be carried out to millivolt level alternating current-direct current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720211478.8U CN206594222U (en) | 2017-03-06 | 2017-03-06 | A kind of device for differentiating the IC-card true and false |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720211478.8U CN206594222U (en) | 2017-03-06 | 2017-03-06 | A kind of device for differentiating the IC-card true and false |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206594222U true CN206594222U (en) | 2017-10-27 |
Family
ID=60126470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720211478.8U Active CN206594222U (en) | 2017-03-06 | 2017-03-06 | A kind of device for differentiating the IC-card true and false |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206594222U (en) |
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2017
- 2017-03-06 CN CN201720211478.8U patent/CN206594222U/en active Active
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