CN103487671A - Method and device for detecting non-contact card - Google Patents
Method and device for detecting non-contact card Download PDFInfo
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- CN103487671A CN103487671A CN201210193373.6A CN201210193373A CN103487671A CN 103487671 A CN103487671 A CN 103487671A CN 201210193373 A CN201210193373 A CN 201210193373A CN 103487671 A CN103487671 A CN 103487671A
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Abstract
The embodiment of the invention provides a method and device for detecting a non-contact card. The method mainly includes the steps that a card reading circuit generates a radio frequency signal and sends out the radio frequency signal; a switched on relay in a relay circuit transmits the radio frequency signal sent by the card reading circuit to an assigned antenna controlled by the switched on relay, the assigned antenna sends a detection signal to a certain corresponding non-contact card and receives response information returned by the non-contact card, and the response information is transmitted to the card reading circuit through the switched on relay in a connected mode; the card reading circuit detects the non-contact card according to the received response information returned by the non-contact card to obtain a detection result of the non-contact card. The method and device can reduce mutual interference between different non-contact cards when the card reading circuit detects the non-contact card.
Description
Technical field
The present invention relates to the contactless card technique of microelectronic, relate in particular to a kind of method and apparatus that non-contact card is detected.
Background technology
The processing of non-contact IC (intelligent card, smart card) card is mainly that Card Reader chip and aerial coil are welded, more further is processed into non-contacting IC-card by lamination and overlay film.The welding technology of chip and aerial coil adopts the thermal compression welding mode, therefore, when the welding technology between chip and antenna goes wrong, will cause occurring underproof card.
A kind of method of the welding technology of non-contact card of checking of the prior art is: the mode that adopts a read write line to join a miniature antenna detects the element layer of non-contact IC card.The shortcoming of the method is: owing on a large thin plate, a plurality of IC-cards being arranged, when above-mentioned read write line is detected an IC-card, easily be subject to the interference of other IC-card, easily cause the undetected and flase drop of IC-card.
Summary of the invention
Embodiments of the invention provide a kind of method and apparatus that non-contact card is detected, interfering with each other between different non-contact cards while to reduce card reading circuit, detecting non-contact card.
A kind of equipment that non-contact card is detected comprises: card reading circuit, control relay circuit, relay circuit and antenna array;
Described card reading circuit, for generation of radiofrequency signal, send radiofrequency signal; The response message returned according to the non-contact card received, detected described non-contact card, obtains the testing result of described non-contact card;
Described control relay circuit, for the opening and closing of all relays of controlling described relay circuit, within the treatment cycle of a radiofrequency signal, only control and open a relay;
Described relay circuit, comprise a plurality of relays, the antenna of an appointment of a Control, the antenna of the appointment that the radiofrequency signal conducting that the relay by a unlatching sends described card reading circuit is controlled to the relay of described unlatching, by the antenna reception of described appointment to the response message conducting returned of non-contact card to described card reading circuit;
Described antenna array, comprise a plurality of antennas, each antenna and a non-contact card correspondence, after the radiofrequency signal sent to described card reading circuit at certain antenna reception, described radiofrequency signal is sent to the specific non-contact card that described certain antenna is corresponding, receive the response message that described specific non-contact card returns, the conducting by this response message by the relay opened sends to described card reading circuit.
A kind of method that non-contact card is detected comprises:
Card reading circuit produces radiofrequency signal, and radiofrequency signal is sent;
Within the treatment cycle of a radiofrequency signal, by control relay circuit, in controlling, only open a relay in a plurality of relays in described relay circuit;
The antenna of the appointment that the radiofrequency signal conducting that the relay of the unlatching in described relay circuit sends described card reading circuit is controlled to the relay of described unlatching;
The antenna of described appointment sends to described detection signal specific certain non-contact card of its correspondence, receives the response message that described certain non-contact card returns, and the conducting by this response message by the relay opened sends to described card reading circuit;
The response message that described card reading circuit returns according to the non-contact card received, detected described non-contact card, obtains the testing result of described non-contact card.
The technical scheme provided by the embodiment of the invention described above can be found out, the embodiment of the present invention is by within the treatment cycle of a radiofrequency signal, only open a relay, a relay is only controlled an antenna, field intensity on antenna is controlled in specified scope, antenna only and a non-contact card correspondence, thereby interfering with each other between different non-contact cards in the time of can reducing card reading circuit and detect non-contact card.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The applied environment schematic diagram of a kind of equipment that non-contact card is detected that Fig. 1 provides for the embodiment of the present invention one;
The concrete structure figure of a kind of equipment that non-contact card is detected that Fig. 2 provides for the embodiment of the present invention one;
The structural drawing of a kind of card reading circuit that Fig. 3 provides for the embodiment of the present invention one;
The structural drawing of a kind of control relay circuit that Fig. 4 provides for the embodiment of the present invention one;
The connected mode schematic diagram of a kind of relay circuit that Fig. 5 provides for the embodiment of the present invention one;
The processing flow chart of a kind of method that non-contact card is detected that Fig. 6 provides for the embodiment of the present invention two.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
For ease of the understanding to the embodiment of the present invention, take several specific embodiments below in conjunction with accompanying drawing and be further explained explanation as example, and each embodiment does not form the restriction to the embodiment of the present invention.
Embodiment mono-
As shown in Figure 1, the concrete structure of this equipment as shown in Figure 2, mainly comprises the applied environment of a kind of equipment that non-contact card is detected that this embodiment provides: card reading circuit 21, control relay circuit 22, relay circuit 23, antenna array 24.
The structural drawing of a kind of card reading circuit that this embodiment provides as shown in Figure 3, comprises following module:
Radio-frequency signal processing module 31, for generation of radiofrequency signal, the intensity that the value of the chip internal register by changing card reading circuit is controlled described radiofrequency signal, in setting range, adopts the mode of single channel output to send described radiofrequency signal;
While for reducing card reading circuit, detecting non-contact card, interfering with each other between different non-contact cards, the radio frequency output of card reading circuit changes 50 Ω single channel outputs into, and the magnetic field intensity of control card reading circuit, the maintenance magnetic field intensity is 1.5A/M2, and then the intensity of the radiofrequency signal of control card reading circuit emission is in setting range, the radiofrequency signal of the single channel output of above-mentioned intensity in setting range can only search specific certain non-contact card corresponding to antenna of appointment, thereby reduces interfering with each other between different non-contact cards.In actual applications, can adjust by the value of adjusting the register in card reading circuit the magnetic field intensity of card reading circuit.
Response message processing module 32, receive for the conducting by relay the response message that non-contact card returns, and judges that whether described response message is correct, and if so, the testing result of determining described non-contact card is qualified; Otherwise the testing result of determining described non-contact card is defective, and the testing result of described non-contact card is sent to host computer.
The structural drawing of a kind of control relay circuit that this embodiment provides as shown in Figure 4, comprises following module:
Driving circuit can be comprised of 74HC164 and ULN2003,74HC164 seals in and goes out the high-speed door circuit, employing can be saved the resource of single-chip microcomputer, simplifies the design circuit of single-chip microcomputer, adopts four 74LS164 cascades (considering the detection of Mifare One card) in this application.ULN2003 is high output voltage, and driver is managed in the Darlington of High Output Current, is mainly used in the driving of relay, LED demonstration etc., and its single channel maximum output current can reach 500mA, can meet the requirement of AQY221N1S.
In one embodiment, relay can adopt the high frequency relay AQY221N1S of PANASONIC, and its output capacitance is 2.0pF, and conducting resistance is 9.8 Ω, and ON time is 0.04ms, and the turn-off time is 0.06ms.
In this embodiment, for China second-generation identity card, the antenna format is 4 * 8, and the size of single coil should be less than 78.6mm * 47.0mm.In another kind of embodiment, for Mifare One card, the antenna format is 4 * 10.
In actual applications, the conducting resistance of above-mentioned a plurality of high frequency relays and the size of output capacitance will have influence on the parameters such as the impedance, electric capacity of each antenna in antenna array, can adopt series winding and the mode combined in parallel to above-mentioned a plurality of high frequency relays, adjust impedance, the electric capacity of each antenna in antenna array, make the signal emitting performance of each antenna reach best.Such as, above-mentioned a plurality of high frequency relays adopt 4 grades of series windings and 16 grades of modes that parallel connection mutually combines.4 grades of series windings, through overtesting, when four whole conductings of relay, make the impedance of 50 Ω antennas increase approximately 10 Ω left and right, and phasing degree increases approximately 10.16 grades of parallel connections, through overtesting, when the relay conducting, make the impedance of 50 Ω antennas increase approximately 3 Ω left and right, and phasing degree increases approximately 3 ° of left and right.The skew of this antenna caused due to external circuits, the tunable capacitor of adjusting on antenna can be transferred to the impedance of antenna in the antenna allowed band.By the comparison of above-mentioned two kinds of connected modes, we can find out, when adopting parallel way, on the minimum that affects of antenna generation.But the I/O electric capacity of considering AQY22N1S is 1.5pF, when 16 relays are in parallel, the maximal value of its I/O electric capacity likely reaches 1.5 * 16=24pF, and this capacitance likely produces irreversible impact to antenna.Consider the impact of relay connection in series-parallel on antenna, as shown in Figure 5, connected mode reaches optimal effectiveness to the antenna capacitance coupling to the connected mode of a kind of relay circuit that this embodiment provides like this.Whole equipment adopts the design shown in 8 picture groups 5 just to form connection in series-parallel relay system circuit design.
In the above-mentioned equipment that non-contact card is detected, can be by antenna and card reading circuit, control relay circuit and relay circuit are placed in a large housing, reserve power supply and serial interface.
According to above-mentioned Fig. 2, card reader, control relay circuit, relay circuit adopt a single external power source, and this power acquisition is output as 12V/1.5A with power supply and can satisfies the demands.In one embodiment, the On current of AQY221N1S needs 5mA, owing to needing at most 25 relays in a circuit, therefore when the conducting simultaneously of 25 relays, needs the electric current of 5 * 25=125mA, and the electric current of card reader is about the 100mA left and right.
Embodiment bis-
The equipment that non-contact card is detected based on shown in above-mentioned Fig. 1, the treatment scheme of a kind of method that non-contact card is detected that this embodiment provides as shown in Figure 6, comprises following step:
After card reading circuit receives the order of host computer transmission, produce radiofrequency signal.While for reducing card reading circuit, detecting non-contact card, interfering with each other between different non-contact cards, the value of the chip internal register by changing card reading circuit is controlled the intensity of the radiofrequency signal that card reading circuit produces in setting range, adopt the mode of single channel output to send described radiofrequency signal, the radiofrequency signal of the single channel output of described intensity in setting range can only search a non-contact card.
By each relay in described relay circuit, adopt series winding to combine and be connected with parallel connection, adjust impedance, the electric capacity of each antenna in antenna array, and then adjust the signal emitting performance of each antenna, make the signal emitting performance of each antenna reach best.
Described control relay circuit and host computer communicate, and receive the instruction that host computer sends over;
According to described instruction, by central processing unit and driving circuit, within the treatment cycle of a radiofrequency signal, choose successively a relay from described a plurality of relays, control a relay of choosing and open, control other cut-off.
The radiofrequency signal that the described card reading circuit of the relay conducting of the unlatching in step 63, described relay circuit sends is to the antenna of appointment, and the antenna of this appointment sends to this radiofrequency signal the non-contact card corresponding to antenna of appointment.
Described relay circuit, comprise a plurality of relays, the antenna of an appointment of a Control, the antenna of the appointment of the radiofrequency signal conducting of described card reading circuit transmission being controlled to the relay of described unlatching by the relay of a unlatching.
Antenna array comprises a plurality of antennas, and the arrangement mode of the plurality of antenna is identical with the arrangement mode of a plurality of non-contact cards to be detected, is all to determine according to the template of setting, thereby has realized an antenna only and a specific non-contact card position correspondence.Such as, above-mentioned a plurality of antennas and a plurality of non-contact cards to be detected all are arranged in rectangle.
The radiofrequency signal that the antenna of above-mentioned appointment sends the card reading circuit received sends to the non-contact card corresponding with its position.Due to, each antenna only and a specific non-contact card position correspondence, the detection signal that above-mentioned certain antenna sends can only search specific non-contact card corresponding to this aerial position.
The response message that non-contact card corresponding to the antenna reception of step 64, described appointment and its position returns, the conducting by described response message by the relay opened sends to card reading circuit.The response message that card reading circuit returns according to the non-contact card received, detected described non-contact card, obtains the testing result of described non-contact card.
Described card reading circuit receives by the conducting of relay the response message that non-contact card returns, and judges that whether described response message is correct, and if so, the testing result of determining described non-contact card is qualified; Otherwise the testing result of determining described non-contact card is defective, and the testing result of described non-contact card is sent to host computer.
In addition, can increase the acousto-optic hint module, whether qualified for pointing out reviewer's card.Utilize display interface and the hummer of host computer to realize.When having bad card to occur, host computer shows that corresponding card is for red marker, and buzzer call one sound, and when being good card, host computer is shown in green.
The action of above-mentioned control relay circuit and card reading circuit all need to be assigned instruction by above-mentioned host computer and just can complete, and above-mentioned host computer will preserve the testing result that card reading circuit obtains, and testing result is reflected to corresponding screen.In addition, above-mentioned host computer also should be able to be preserved the result of each detection, is convenient to inquiry, the statistical study of data from now on; Also should be able to preserve operator's corresponding information.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, and the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the equipment in embodiment can be described and be distributed in the equipment of embodiment according to embodiment, also can carry out respective change and be arranged in the one or more equipment that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
In sum, the embodiment of the present invention is by within the treatment cycle of a radiofrequency signal, only open a relay, a relay is only controlled an antenna, field intensity on antenna is controlled in specified scope, antenna only and a non-contact card correspondence, thereby interfering with each other between different non-contact cards in the time of can reducing card reading circuit and detect non-contact card.
The embodiment of the present invention changes single channel output into by the output of the radio frequency by card reading circuit, and the magnetic field intensity of control card reading circuit, realize that the detection signal that certain antenna sends can only search specific non-contact card corresponding to this aerial position, further reduces interfering with each other between different non-contact cards.
The embodiment of the present invention adopts series winding to combine and be connected with parallel connection by each relay in described relay circuit, adjusts impedance, the electric capacity of each antenna in antenna array, and then adjusts the signal emitting performance of each antenna.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, anyly is familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (11)
1. the equipment that non-contact card is detected, is characterized in that, comprising: card reading circuit, control relay circuit, relay circuit and antenna array;
Described card reading circuit, for generation of radiofrequency signal, send radiofrequency signal; The response message returned according to the non-contact card received, detected described non-contact card, obtains the testing result of described non-contact card;
Described control relay circuit, for the opening and closing of all relays of controlling described relay circuit, within the treatment cycle of a radiofrequency signal, only control and open a relay;
Described relay circuit, comprise a plurality of relays, the antenna of an appointment of a Control, the antenna of the appointment that the radiofrequency signal conducting that the relay by a unlatching sends described card reading circuit is controlled to the relay of described unlatching, by the antenna reception of described appointment to the response message conducting returned of non-contact card to described card reading circuit;
Described antenna array, comprise a plurality of antennas, each antenna and a non-contact card correspondence, after the radiofrequency signal sent to described card reading circuit at certain antenna reception, described radiofrequency signal is sent to the specific non-contact card that described certain antenna is corresponding, receive the response message that described specific non-contact card returns, the conducting by this response message by the relay opened sends to described card reading circuit.
2. a kind of equipment that non-contact card is detected according to claim 1, is characterized in that, described card reading circuit comprises:
Radio-frequency signal processing module, for generation of radiofrequency signal, the intensity that the value of the chip internal register by changing card reading circuit is controlled described radiofrequency signal, in setting range, adopts the mode of single channel output to send described radiofrequency signal;
The response message processing module, receive for the conducting by relay the response message that non-contact card returns, and judges that whether described response message is correct, and if so, the testing result of determining described non-contact card is qualified; Otherwise the testing result of determining described non-contact card is defective, and the testing result of described non-contact card is sent to host computer.
3. a kind of equipment that non-contact card is detected according to claim 1, is characterized in that, described control relay circuit comprises:
Telecommunication circuit, for communicating with host computer, receive the instruction that host computer sends over, and described instruction is sent to central processing unit;
Central processing unit, for the instruction sended over according to described telecommunication circuit, to the driving circuit sending controling instruction;
Driving circuit, for the steering order sended over according to described central processing unit, within the treatment cycle of a radiofrequency signal, choose successively a relay from described a plurality of relays, the relay that control is chosen is opened, and controls other cut-off.
4. a kind of equipment that non-contact card is detected according to claim 1, is characterized in that, each relay in described relay circuit adopts series winding and the connected mode combined in parallel.
5. according to the described a kind of equipment that non-contact card is detected of claim 1 to 4 any one, it is characterized in that, the arrangement mode of a plurality of antennas in described antenna array is identical with the arrangement mode of a plurality of non-contact cards to be detected, be all to determine according to the template of setting, antenna only and a specific non-contact card position correspondence.
6. the method that non-contact card is detected, is characterized in that, comprising:
Card reading circuit produces radiofrequency signal, and radiofrequency signal is sent;
Within the treatment cycle of a radiofrequency signal, by control relay circuit, in controlling, only open a relay in a plurality of relays in described relay circuit;
The antenna of the appointment that the radiofrequency signal conducting that the relay of the unlatching in described relay circuit sends described card reading circuit is controlled to the relay of described unlatching;
The antenna of described appointment sends to described detection signal specific certain non-contact card of its correspondence, receives the response message that described certain non-contact card returns, and the conducting by this response message by the relay opened sends to described card reading circuit;
The response message that described card reading circuit returns according to the non-contact card received, detected described non-contact card, obtains the testing result of described non-contact card.
7. the method that non-contact card is detected according to claim 6, is characterized in that, described card reading circuit produces radiofrequency signal, radiofrequency signal is sent to source and comprise:
The value of the chip internal register by changing card reading circuit is controlled the intensity of described radiofrequency signal in setting range, adopt the mode of single channel output to send described radiofrequency signal, the radiofrequency signal of intensity in setting range of described single channel output can only search specific certain non-contact card corresponding to antenna of described appointment.
8. the method that non-contact card is detected according to claim 6, is characterized in that, described method also comprises:
By each relay in described relay circuit, adopt series winding to combine and be connected with parallel connection, adjust impedance, the electric capacity of each antenna in antenna array, and then adjust the signal emitting performance of each antenna.
9. the method that non-contact card is detected according to claim 6, is characterized in that, described method also comprises:
The arrangement mode of a plurality of antennas in described antenna array is identical with the arrangement mode of a plurality of non-contact cards to be detected, is all to determine according to the template of setting, and antenna only and a specific non-contact card position correspondence.
10. the method that non-contact card is detected according to claim 6, it is characterized in that, described within the treatment cycle of a radiofrequency signal, control a relay in a plurality of relays of only opening in described relay circuit by control relay circuit, comprising:
Described control relay circuit and host computer communicate, and receive the instruction that host computer sends over;
According to described instruction, by central processing unit and driving circuit, within the treatment cycle of a radiofrequency signal, choose successively a relay from described a plurality of relays, control a relay of choosing and open, control other cut-off.
11. according to the described method that non-contact card is detected of claim 6 to 10 any one, it is characterized in that, the response message that described card reading circuit returns according to the non-contact card received, described non-contact card is detected, obtain the testing result of described non-contact card, comprising:
Described card reading circuit receives by the conducting of relay the response message that non-contact card returns, and judges that whether described response message is correct, and if so, the testing result of determining described non-contact card is qualified; Otherwise the testing result of determining described non-contact card is defective, and the testing result of described non-contact card is sent to host computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210193373.6A CN103487671B (en) | 2012-06-12 | 2012-06-12 | The method and apparatus that non-contact card is detected |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210193373.6A CN103487671B (en) | 2012-06-12 | 2012-06-12 | The method and apparatus that non-contact card is detected |
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| CN103487671A true CN103487671A (en) | 2014-01-01 |
| CN103487671B CN103487671B (en) | 2016-10-12 |
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Cited By (1)
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| CN104865459A (en) * | 2015-03-23 | 2015-08-26 | 珠海市金邦达保密卡有限公司 | Method and apparatus for detecting defectivenesss of non-contact card chips |
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| CN101581758A (en) * | 2008-05-14 | 2009-11-18 | 北京中电华大电子设计有限责任公司 | Non-contact card chip WAFER-grade testing circuit |
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| CN202693698U (en) * | 2012-06-12 | 2013-01-23 | 航天信息股份有限公司 | Device used for non-contact card detection |
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| US20060097049A1 (en) * | 2004-09-16 | 2006-05-11 | Moore J D | Contactless card reader integrated into a touchpad |
| CN101581758A (en) * | 2008-05-14 | 2009-11-18 | 北京中电华大电子设计有限责任公司 | Non-contact card chip WAFER-grade testing circuit |
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