CN103487671B - The method and apparatus that non-contact card is detected - Google Patents
The method and apparatus that non-contact card is detected Download PDFInfo
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- CN103487671B CN103487671B CN201210193373.6A CN201210193373A CN103487671B CN 103487671 B CN103487671 B CN 103487671B CN 201210193373 A CN201210193373 A CN 201210193373A CN 103487671 B CN103487671 B CN 103487671B
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Abstract
Embodiments provide a kind of method and apparatus that non-contact card is detected.The method specifically includes that card reading circuit produces radiofrequency signal, radiofrequency signal is sent；The radiofrequency signal that described card reading circuit sends is turned on the antenna specified that the relay to described unlatching is controlled by the relay of the unlatching in relay circuit, described detection signal is sent to certain non-contact card specific of its correspondence by the antenna specified, receive the response message that certain non-contact card described returns, the conducting of this response message relay by opening is sent to described card reading circuit；The response message that card reading circuit returns according to the non-contact card received, detects described non-contact card, obtains the testing result of described non-contact card.Interfering with each other between difference non-contact card when the embodiment of the present invention can reduce card reading circuit detection non-contact card.
Description
Technical field
The present invention relates to the contactless card technique of microelectronic, particularly relate to a kind of to non-contact card
The method and apparatus carrying out detecting.
Background technology
The processing that non-contact IC (intelligent card, smart card) blocks is mainly Card Reader chip and sky
Line coil welds, then is further processed into non-contacting IC-card by lamination and overlay film.Chip and antenna
The welding procedure of coil uses thermal compression welding mode, and therefore the welding procedure between chip and antenna occurs
The when of problem, may result in the underproof card of appearance.
The method of a kind of welding procedure checking non-contact card of the prior art is: use a reading
Write device to join the mode of a miniature antenna and detect the element layer of non-contact IC card.The shortcoming of the method is: by
Yu Yi opens multiple IC-card on big thin plate, when an IC-card is detected by above-mentioned read write line, be easily subject to
To the interference of other IC-card, easily cause missing inspection and the flase drop of IC-card.
Summary of the invention
The embodiment provides a kind of method and apparatus that non-contact card is detected, to subtract
Interfering with each other between difference non-contact card during few card reading circuit detection non-contact card.
A kind of equipment that non-contact card is detected, including: card reading circuit, Control electricity
Road, relay circuit and antenna array；
Described card reading circuit, is used for producing radiofrequency signal, radiofrequency signal is sent；According to reception
The response message that the non-contact card arrived returns, detects described non-contact card, obtains described non-
The testing result of contact card；
Described control relay circuit, for controlling opening of all relays in described relay circuit
Open and close, within the process cycle of a radiofrequency signal, only control to open a relay；
Described relay circuit, including multiple relays, one sky specified of a Control
Line, is turned on the radiofrequency signal that described card reading circuit sends to described unlatching by a relay opened
The antenna specified that controlled of relay, the non-contact card received by the described antenna specified returns
Response message turn on to described card reading circuit；
Described antenna array, including multiple antennas, each antenna and a non-contact card correspondence, at certain
After individual antenna receives the radiofrequency signal that described card reading circuit sends, described radiofrequency signal is sent to described
The specific non-contact card that certain antenna is corresponding, receives the response that described specific non-contact card returns
Information, is sent to described card reading circuit by the conducting of this response message relay by opening.
A kind of method that non-contact card is detected, including:
Card reading circuit produces radiofrequency signal, radiofrequency signal is sent；
Within the process cycle of a radiofrequency signal, only open institute by control relay circuit in control
State a relay in the multiple relays in relay circuit；
The radiofrequency signal that described card reading circuit sends is led by the relay of the described unlatching in relay circuit
Lead to the antenna specified that the relay to described unlatching is controlled；
Described detection signal is sent to certain non-contact card specific of its correspondence by the described antenna specified
Sheet, receives the response message that certain non-contact card described returns, by this response message by continuing of opening
The conducting of electrical equipment is sent to described card reading circuit；
The response message that described card reading circuit returns according to the non-contact card that receives, non-connects described
Tactile card detects, and obtains the testing result of described non-contact card.
The technical scheme provided by embodiments of the invention described above is it can be seen that the embodiment of the present invention is passed through
Within the process cycle of one radiofrequency signal, only opening a relay, a relay only controls one
Antenna, the field intensity on antenna controls within the specified range, and an antenna is the most corresponding with a non-contact card,
Such that it is able to interfering with each other between difference non-contact card when reducing card reading circuit detection non-contact card.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some bright embodiments, for those of ordinary skill in the art, are not paying creative work
Under premise, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The application of a kind of equipment that non-contact card is detected that Fig. 1 provides for the embodiment of the present invention one
Environment schematic；
A kind of equipment that non-contact card is detected that Fig. 2 provides for the embodiment of the present invention one concrete
Structure chart；
The structure chart of a kind of card reading circuit that Fig. 3 provides for the embodiment of the present invention one；
The structure chart 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 process of a kind of method that non-contact card is detected that Fig. 6 provides for the embodiment of the present invention two
Flow chart.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of protection of the invention.
For ease of the understanding to the embodiment of the present invention, below in conjunction with accompanying drawing as a example by several specific embodiments
It is further explained explanation, and each embodiment is not intended that the restriction to the embodiment of the present invention.
Embodiment one
Applied environment such as Fig. 1 institute of a kind of equipment that non-contact card is detected that this embodiment provides
Showing, the concrete structure of this equipment is as in figure 2 it is shown, specifically include that card reading circuit 21, control relay circuit
22, relay circuit 23, antenna array 24.
Card reading circuit 21, is used for producing radiofrequency signal, radiofrequency signal is sent；According to receive
The response message that non-contact card returns, detects described non-contact card, obtains described noncontact
The testing result of card, is sent to host computer by this testing result.As China second-generation identity card non-contact card
Its technology of card reading circuit requires to meet the regulation in GA 450-2003.
The structure chart of a kind of card reading circuit that this embodiment provides is as it is shown on figure 3, include following module:
Radio-frequency signal processing module 31, is used for producing radiofrequency signal, in the chip by change card reading circuit
The value of portion's depositor controls the intensity of described radiofrequency signal in set point, described radiofrequency signal is adopted
Send by the mode of single channel output；
During for reducing card reading circuit detection 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 into and exports, and controls the magnetic field intensity of card reading circuit, keeps
Magnetic field intensity is 1.5A/M2, and then controls the intensity of the radiofrequency signal that card reading circuit is launched at set point
In, the radiofrequency signal of above-mentioned intensity single channel output in set point can only search the antenna pair specified
Certain non-contact card specific answered, thus reduce interfering with each other between different non-contact card.?
In actual application, the magnetic field of card reading circuit can be adjusted by the value adjusting the depositor in card reading circuit
Intensity.
Response message processing module 32, for receiving answering of non-contact card return by the conducting of relay
Answer information, it is judged that described response message is the most correct, if it is, determine the detection of described non-contact card
Result is qualified；Otherwise, it determines the testing result of described non-contact card is defective, and described non-
The testing result of contact card is sent to host computer.
Control relay circuit 22, for the instruction transmitted according to host computer, controls opening of each relay
Close so that each relay opens and closes successively, i.e. controls to switch between each relay,
The most only open a relay.For making relay can have longer working life, each relay should be reduced
The on-off times of device.When controlling the switch of relay, relay switch should be disposably made to put in place.
This embodiment provide a kind of control relay circuit structure chart as shown in Figure 4, including following mould
Block:
Telecommunication circuit 41, for communicating with host computer, receives the instruction that host computer sends over, will
Described instruction is sent to central processing unit；RS232 telecommunication circuit communicates with host computer, receives upper
The instruction that machine transmits, then control each relay by CPU and drive circuit and open and close successively.
Central processing unit 42, for the instruction sended over according to described telecommunication circuit, sends out to drive circuit
Send control instruction；
Drive circuit 43, for the control instruction sended over according to described central processing unit, penetrates at one
Frequently within the process cycle of signal, from the plurality of relay, choose a relay successively, control choosing
The relay taken is opened, and controls other cut-off.
Drive circuit can be made up of 74HC164 and ULN2003, and 74HC164 is to seal in and go out high-speed door
Circuit, uses the resource that can save single-chip microcomputer, simplifies the design circuit of single-chip microcomputer, adopts in this application
With four 74LS164 cascade (in view of the detection of Mifare One card).ULN2003 is high output electricity
Pressure, the Darlington pipe driver of High Output Current, it is mainly used in relay, LED shows etc. driving,
Its single channel maximum output current can reach 500mA, can meet the requirement of AQY221N1S.
Relay circuit 23, is made up of multiple high frequency relays, one sky specified of a Control
Line, is turned on the radiofrequency signal that described card reading circuit sends to described unlatching by a relay opened
The antenna specified that controlled of relay, the non-contact card received by the described antenna specified returns
Response message turn on to described card reading circuit.
In one embodiment, relay can use the high frequency relay AQY221N1S of PANASONIC,
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。
Antenna array 24, including multiple antennas, the arrangement mode of the plurality of antenna and to be detected multiple non-connect
The arrangement mode touching card is identical, is all to determine according to the template set, it is achieved thereby that an antenna
The most corresponding with a specific non-contact card position.Such as, above-mentioned multiple antenna and to be detected multiple
Non-contact card is all arranged in rectangle.The radiofrequency signal that described card reading circuit sends is received at certain antenna
After, described radiofrequency signal is sent to the specific non-contact card that certain antenna described is corresponding, receives institute
State the response message that specific non-contact card returns, by this response message leading by the relay of unlatching
Lead to and be sent to described card reading circuit.
In this embodiment, for China second-generation identity card, antenna format is 4 × 8, and the size of single coil should
Less than 78.6mm × 47.0mm.In another kind of embodiment, for Mifare One card, antenna format is
4×10。
In actual applications, the conducting resistance of above-mentioned multiple high frequency relay and the size of output capacitance will
Have influence on the parameters such as the impedance of each antenna in antenna array, electric capacity, can be to above-mentioned multiple high frequency relays
Device uses series winding and the mode combined in parallel, adjusts the impedance of each antenna in antenna array, electricity
Hold so that the signal emitting performance of each antenna reaches optimal.Such as, above-mentioned multiple high frequency relay is adopted
The mode be combineding with each other with 4 grades of series windings and 16 grades of parallel connections.4 grades of series windings, through overtesting, when four relays
When all turning on, making impedance increase about 10 about the Ω of 50 Ω antennas, phase angle increases about 10.16 grades also
Connection, through overtesting, when relay turns on, makes impedance increase about 3 about the Ω of 50 Ω antennas, phase angle
Increase about about 3 °.The skew of this antenna caused due to external circuits, adjusts the adjustable electric on antenna
Within the impedance of antenna can be transferred to antenna allowed band by appearance.By the ratio of above two connected mode
Relatively, it will be seen that when using parallel way, the impact producing antenna is minimum.It is contemplated that
I/O electric capacity to AQY22N1S is 1.5pF, when 16 relay parallel connections, and the maximum of its I/O electric capacity
Likely reaching 1.5 × 16=24pF, this capacitance likely produces irreversible impact to antenna.Combine
Close and consider the relay connection in series-parallel impact on antenna, the connection of a kind of relay circuit that this embodiment provides
Mode is as it is shown in figure 5, so connected mode reaches optimal effectiveness to antenna capacitance coupling.Whole equipment uses
Design shown in 8 groups of Fig. 5 just composition 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, relay
Device control circuit and relay circuit are placed in a big housing, reserve power supply and serial interface.
According to above-mentioned Fig. 2, outside card reader, control relay circuit, relay circuit employing one is single
Portion's power supply is powered, and this power supply uses power supply to be output as 12V/1.5A can meet demand.Implement in one
In example, the conducting electric current of AQY221N1S needs 5mA, continues owing at most needing 25 in a circuit
Electrical equipment, therefore simultaneously turns on when 25 relays, then needs the electric current of 5 × 25=125mA, card reader
Electric current is about at about 100mA.
Embodiment two
Based on the equipment that non-contact card is detected shown in above-mentioned Fig. 1, the one that this embodiment provides
The handling process of the method detecting non-contact card as shown in Figure 6, comprises the following steps that
Step 61, card reading circuit produce radiofrequency signal, and the mode that radiofrequency signal uses single channel export sends
Go out.
After card reading circuit receives the order that host computer sends, produce radiofrequency signal.For reducing card reading circuit
During detection non-contact card, interfering with each other between different non-contact cards, by changing card reading circuit
The value of chip internal register controls the intensity of radiofrequency signal that card reading circuit produces in set point,
The mode that described radiofrequency signal uses single channel output sends, described intensity list in set point
The radiofrequency signal of road output can only search a non-contact card.
Carry out even by using series winding and parallel connection to combine on each relay in described relay circuit
Connect, adjust the impedance of each antenna in antenna array, electric capacity, and then the signal adjusting each antenna and send out
Penetrate performance, make the signal emitting performance of each antenna reach optimal.
Step 62, within the process cycle of a radiofrequency signal, by control relay circuit in control
Only open a relay in the multiple relays in described relay circuit.
Described control relay circuit communicates with host computer, receives the instruction that host computer sends over；
According to described instruction, by central processing unit and drive circuit, in the process week of a radiofrequency signal
Within phase, from the plurality of relay, choose a relay successively, control the relay chosen
Open, control other cut-off.
The relay of the unlatching in step 63, described relay circuit turns on what described card reading circuit sent
Radiofrequency signal gives the antenna specified, and the antenna that this radiofrequency signal is sent to specify by this antenna specified is corresponding
Non-contact card.
Described relay circuit, including multiple relays, one sky specified of a Control
Line, is turned on the radiofrequency signal that described card reading circuit sends to described unlatching by a relay opened
The antenna specified that controlled of relay.
Antenna array includes multiple antenna, the arrangement mode of the plurality of antenna and multiple noncontacts to be detected
The arrangement mode of card is identical, is all to determine according to the template set, it is achieved thereby that an antenna is only
Corresponding with a specific non-contact card position.Such as, above-mentioned multiple antenna and to be detected multiple non-
Contact card is all arranged in rectangle.
The radiofrequency signal that the card reading circuit received sends is sent to and its position pair by the above-mentioned antenna specified
The non-contact card answered.Due to, each antenna is the most corresponding with a specific non-contact card position, on
The detection signal stating the transmission of certain antenna can only search the specific non-contact card that this aerial position is corresponding
Sheet.
Step 64, the described antenna specified receive the response letter that the non-contact card corresponding with its position returns
Breath, is sent to card reading circuit by the conducting of the described response message relay by opening.Card reading circuit root
The response message returned according to the non-contact card received, detects 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 sentences
Disconnected described response message is the most correct, if it is, determine that the testing result of described non-contact card is for closing
Lattice；Otherwise, it determines the testing result of described non-contact card is defective, and described non-contact card
Testing result be sent to host computer.
Furthermore it is possible to increase acousto-optic hint module, it is used for pointing out reviewer's card the most qualified.Utilize
Display interface and the buzzer of host computer realize.When there being bad card to occur, host computer shows corresponding card
For red marker, and buzzer call one sound, when blocking preferably, host computer is shown in green.
The action of above-mentioned control relay circuit and card reading circuit is required to be assigned instruction just by above-mentioned host computer
Can complete, and the testing result that above-mentioned host computer card reading circuit to be preserved obtains, and testing result is anti-
Reflect corresponding screen.In addition, above-mentioned host computer also should be able to preserve the result of detection every time, it is simple to
The inquiry of data from now on, statistical analysis；Also should be able to preserve the corresponding information of operator.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, in accompanying drawing
Module or flow process not necessarily implement necessary to the present invention.
One of ordinary skill in the art will appreciate that: the module in equipment in embodiment can be according to enforcement
Example describes in the equipment being distributed in embodiment, it is also possible to carries out respective change and is disposed other than the present embodiment
In one or more equipment.The module of above-described embodiment can merge into a module, it is also possible to further
Split into multiple submodule.
In sum, the embodiment of the present invention, by within the process cycle of a radiofrequency signal, is only opened
One relay, a relay only controls an antenna, and the field intensity on antenna controls in appointment scope
In, an antenna is the most corresponding with a non-contact card, such that it is able to reduce card reading circuit detection non-contact card
Interfering with each other between difference non-contact card during sheet.
The embodiment of the present invention exports by changing the output of the radio frequency of card reading circuit into single channel, and controls Card Reader electricity
The magnetic field intensity on road, it is achieved it is corresponding that the detection signal that certain antenna sends can only search this aerial position
Specific non-contact card, reduces interfering with each other between different non-contact card further.
The embodiment of the present invention by using series winding and phase in parallel to each relay in described relay circuit
In conjunction with being attached, adjust the impedance of each antenna in antenna array, electric capacity, and then adjust each sky
The signal emitting performance of line.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not
Being confined to this, any those familiar with the art, can in the technical scope that the invention discloses
The change readily occurred in or replacement, all should contain within protection scope of the present invention.Therefore, the present invention
Protection domain should be as the criterion with scope of the claims.
Claims (11)
1. the equipment that non-contact card is detected, it is characterised in that including: card reading circuit,
Control relay circuit, relay circuit and antenna array；
Described card reading circuit, is used for producing radiofrequency signal, radiofrequency signal is sent；According to reception
The response message that the non-contact card arrived returns, detects described non-contact card, obtains described non-
The testing result of contact card；The intensity of the radiofrequency signal that card reading circuit is launched is in set point, and institute
Stating radiofrequency signal uses the mode of single channel output to send；
Described control relay circuit, for controlling opening of all relays in described relay circuit
Open and close, within the process cycle of a radiofrequency signal, only control to open a relay；
Described relay circuit, including multiple relays, one sky specified of a Control
Line, is turned on the radiofrequency signal that described card reading circuit sends to described unlatching by a relay opened
The antenna specified that controlled of relay, the non-contact card received by the described antenna specified returns
Response message turn on to described card reading circuit；
Described antenna array, including multiple antennas, each antenna and a non-contact card correspondence, at certain
After individual antenna receives the radiofrequency signal that described card reading circuit sends, described radiofrequency signal is sent to described
The specific non-contact card that certain antenna is corresponding, receives the response that described specific non-contact card returns
Information, is sent to described card reading circuit by the conducting of this response message relay by opening.
A kind of equipment detecting non-contact card the most according to claim 1, its feature exists
In, described card reading circuit includes:
Radio-frequency signal processing module, is used for producing radiofrequency signal, by changing the chip internal of card reading circuit
The value of depositor controls the intensity of described radiofrequency signal in set point, described radiofrequency signal is used
The mode of single channel output sends；
Response message processing module, for receiving, by the conducting of relay, the response that non-contact card returns
Information, it is judged that described response message is the most correct, if it is, determine the detection knot of described non-contact card
Fruit is qualified；Otherwise, it determines the testing result of described non-contact card is defective, and non-connect described
The testing result touching card is sent to host computer.
A kind of equipment detecting non-contact card the most according to claim 1, its feature exists
In, described control relay circuit includes:
Telecommunication circuit, for communicating with host computer, receives the instruction that host computer sends over, by institute
State instruction and be sent to central processing unit；
Central processing unit, for the instruction sended over according to described telecommunication circuit, sends to drive circuit
Control instruction；
Drive circuit, for the control instruction sended over according to described central processing unit, at a radio frequency
Within the process cycle of signal, from the plurality of relay, choose a relay successively, control to choose
Relay open, control other cut-off.
A kind of equipment detecting non-contact card the most according to claim 1, its feature exists
In, each relay in described relay circuit uses series winding and the connected mode combined in parallel.
5. according to a kind of equipment that non-contact card is detected described in any one of Claims 1-4,
It is characterized in that, the arrangement mode of the multiple antennas in described antenna array and multiple noncontacts to be detected
The arrangement mode of card is identical, is all to determine according to the template set, and an antenna is only specific with one
Non-contact card position corresponding.
6. apply the method that non-contact card is detected by equipment as claimed in claim 1, its
It is characterised by, including:
Card reading circuit produces radiofrequency signal, radiofrequency signal is sent；The radio frequency letter that card reading circuit is launched
Number intensity in set point, and described radiofrequency signal use single channel output mode send；
Within the process cycle of a radiofrequency signal, only open institute by control relay circuit in control
State a relay in the multiple relays in relay circuit；
The radiofrequency signal that described card reading circuit sends is led by the relay of the described unlatching in relay circuit
Lead to the antenna specified that the relay to described unlatching is controlled；
Described detection signal is sent to certain non-contact card specific of its correspondence by the described antenna specified
Sheet, receives the response message that certain non-contact card described returns, by this response message by continuing of opening
The conducting of electrical equipment is sent to described card reading circuit；
The response message that described card reading circuit returns according to the non-contact card that receives, non-connects described
Tactile card detects, and obtains the testing result of described non-contact card.
The method that non-contact card is detected the most according to claim 6, it is characterised in that
Described card reading circuit produces radiofrequency signal, radiofrequency signal is sent source and includes:
The intensity being controlled described radiofrequency signal by the value changing the chip internal register of card reading circuit is existed
In set point, described radiofrequency signal using the mode of single channel output send, described single channel exports
Intensity radiofrequency signal in set point can only search the described antenna specified corresponding specific certain
Individual non-contact card.
The method that non-contact card is detected the most according to claim 6, it is characterised in that
Described method also includes:
Carry out even by using series winding and parallel connection to combine on each relay in described relay circuit
Connect, adjust the impedance of each antenna in antenna array, electric capacity, and then the signal adjusting each antenna and send out
Penetrate performance.
The method that non-contact card is detected the most according to claim 6, it is characterised in that
Described method also includes:
The arrangement mode of the multiple antennas in described antenna array and the row of multiple non-contact cards to be detected
Row mode is identical, is all to determine according to the template set, an antenna and a specific noncontact
Card position is corresponding.
The method that non-contact card is detected the most according to claim 6, it is characterised in that
Described within the process cycle of a radiofrequency signal, control only to open institute by control relay circuit
State a relay in the multiple relays in relay circuit, including:
Described control relay circuit communicates with host computer, receives the instruction that host computer sends over；
According to described instruction, by central processing unit and drive circuit, in the process week of a radiofrequency signal
Within phase, from the plurality of relay, choose a relay successively, control the relay chosen
Open, control other cut-off.
11. according to the method detecting non-contact card described in any one of claim 6 to 10, its
Being characterised by, the response message that described card reading circuit returns according to the non-contact card received, to institute
State non-contact card to detect, obtain the testing result of described non-contact card, including:
Described card reading circuit receives, by the conducting of relay, the response message that non-contact card returns, and sentences
Disconnected described response message is the most correct, if it is, determine that the testing result of described non-contact card is for closing
Lattice；Otherwise, it determines the testing result of described non-contact card is defective, and described non-contact card
Testing result be sent to host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210193373.6A CN103487671B (en) | 2012-06-12 | 2012-06-12 | The method and apparatus that non-contact card is detected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210193373.6A CN103487671B (en) | 2012-06-12 | 2012-06-12 | The method and apparatus that non-contact card is detected |
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| Publication Number | Publication Date |
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| CN103487671A CN103487671A (en) | 2014-01-01 |
| CN103487671B true CN103487671B (en) | 2016-10-12 |
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| CN104865459B (en) * | 2015-03-23 | 2018-08-31 | 珠海市金邦达保密卡有限公司 | One kind is for detecting the undesirable method and device of non-contact card chip |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1789905A4 (en) * | 2004-09-16 | 2016-07-27 | Cirque Corp | A 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 |
| CN201936313U (en) * | 2011-01-21 | 2011-08-17 | 深圳中科讯联科技有限公司 | Radio frequency card reading equipment for realizing near field communication |
| 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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