CN105469012B - Magnetic card reads system and method - Google Patents
Magnetic card reads system and method Download PDFInfo
- Publication number
- CN105469012B CN105469012B CN201510815697.2A CN201510815697A CN105469012B CN 105469012 B CN105469012 B CN 105469012B CN 201510815697 A CN201510815697 A CN 201510815697A CN 105469012 B CN105469012 B CN 105469012B
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- China
- Prior art keywords
- magnetic
- primary processor
- pulse signal
- magnetic card
- magnetic head
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
- G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
- G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
- G06K7/084—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing magnetic material by relative movement detecting flux changes without altering its magnetised state
Abstract
The present invention discloses a kind of magnetic card reading system, including magnetic head and the system primary processor being electrically connected with magnetic head, the magnetic head includes for the magnetic coupling medium of electric signal and electromagnetic induction circuit to be coupled and generated with magnetic card, for amplifying to generated electric signal and the circuit of Shape correction, the electric signal is by amplifying and forming pulse signal after shaping, the pulse signal received is decoded and is verified to obtain the data on the magnetic stripe of magnetic card for receiving the pulse signal by the system primary processor.The present invention also provides a kind of magnetic card read methods.Above-mentioned magnetic card, which reads system and method, can simplify system design, and can reduce cost simultaneously.
Description
Technical field
The present invention relates to information security field, in particular to a kind of reading system and method for magnetic card.
Background technique
Magnetic card is a kind of magnetic recording medium of card-like, character and digital information is recorded using magnetic carrier, for marking
Know identity or other purposes.Magnetic card is made of high-intensitive, plastics resistant to high temperature or papery coating plastics, and energy is moisture-proof, wear-resisting and has
Certain flexibility, it is easy to carry, using relatively stable reliable.Magnetic card is easy to use, and low cost, purposes is extremely wide, can
For making credit card, bank card, subway card, bus card, entrance ticket card, phonecard, electronic game card, ticket, air ticket and each
Kind toll management card etc..Today, we can use magnetic card in many occasions, such as have dinner in dining room, market shopping, multiply it is public
Automobile is made a phone call, into control zone etc., numerous.
The working principle of magnetic card is summarized as follows: it is close to magnetic head when the magnetic stripe on magnetic card and is moved with certain speed, magnetic on magnetic stripe
The information that medium is recorded is coupled by the magnetic medium inside magnetic head, and is converted thereof into the F2F that can be handled by digital circuit and encoded
Digital signal.Later, which passes through programming device (such as CPU, MCU or FPGA) decoding again, can obtain binary system
Magnetic track initial data.
In existing card-reading magnetic head design, system design is complicated, and more using device, cost is relatively high.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of simplified system design, and can reduce simultaneously
The magnetic card of cost reads system and method.
A kind of magnetic card provided by the present invention reads system, including magnetic head, the magnetic head include for coupling simultaneously with magnetic card
Generate electric signal magnetic coupling medium and electromagnetic induction circuit, for amplifying to generated electric signal and Shape correction
Circuit, the electric signal is by amplifying and forming pulse signal after shaping；It further include a system master being electrically connected with the magnetic head
Processor, the system primary processor are decoded and school for receiving the pulse signal, and by the pulse signal received
It tests to obtain the data on the magnetic stripe of magnetic card.
Further, the magnetic head is connected with by the arteries and veins with universal input/output pin of the system primary processor
It rushes signal and is sent to the system primary processor；When the magnetic head is by the output of pulse signal to the system primary processor
When universal input/output pin, universal input/output pin issues interrupt requests, the main place of system to system primary processor
Above-mentioned interrupt requests are set in advance as the highest priority interrupt of system primary processor by reason device, to ensure that unconditional interrupt is current
The program of operation；System primary processor enters high-priority interrupt mode after receiving interrupt requests and receives arteries and veins transmitted by magnetic head
Rush signal.
Further, the high-priority interrupt mechanism of the system primary processor is FIQ quick-speed interruption mechanism.
Further, the high-priority interrupt mechanism of the system primary processor is the non-maskable interrupts mechanism of NMI.
Further, the magnetic head is three tracks head.
Further, the system primary processor is the processor of ARM framework.
The present invention also provides a kind of magnetic card read methods, comprising the following steps:
Generated electric signal carries out signal amplification and shaping when will be with magnetic card magnetic coupling, to form pulse signal；And
By universal input/output pin of output of pulse signal to system primary processor, so that system primary processor is to arteries and veins
It rushes after signal is decoded and verifies, obtains the data on the magnetic stripe of magnetic card.
Further, in by universal input/output pin of output of pulse signal to system primary processor the step of, also
It include: in transmission pulse signal, universal input/output pin of the system primary processor generates interruption simultaneously, so as to be
System primary processor quick-speed interruption, and switch to receive the pulse signal.
The present invention also provides a kind of magnetic card read methods, comprising the following steps:
It is connected by universal input/output pin with magnetic head to receive pulse signal transmitted by magnetic head；And
By the pulse decoding received and verification to obtain the data on the magnetic stripe of magnetic card.
Further, in receiving pulse signal step transmitted by magnetic head, further includes: utilized in return pulse signal
Universal input/output pin generates highest priority interrupt, with quick-speed interruption, and switchs to receive the pulse signal.
Above-mentioned magnetic card reads system and method by the way that pulse signal caused by magnetic head is directly connected to system main process task
The GPIO pin of device, does not need to reuse other buses and carries out data transmission, and interface is simple, and drive software is also simple, greatly
It reduces costs.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings；
Fig. 1 is the block diagram for the better embodiment that magnetic card of the present invention reads system.
Fig. 2 is the flow chart of the better embodiment of magnetic card read method of the present invention.
Fig. 3 is the flow chart of another better embodiment of magnetic card read method of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Firstly, before embodiment is described, it is necessary to be explained to herein presented some terms.Example
Such as:
If occurring describing various elements using the terms such as " first ", " second " herein, but these elements should not
It is limited by these terms.These terms are only used to distinguish an element and another element.Therefore, " first " element can also be with
Referred to as " second " element is without departing from the teachings of the present invention.
In addition, it is to be understood that when referring to an element being " connected " or " coupled " to another element, it can be direct
Ground connects or is directly coupled to another element or there may also be intermediary elements.On the contrary, when referring to an element " directly
When connection " or " directly coupling " arrive another element, then intermediary element is not present.
Various terms what appears in this article are used only for the purpose of description specific embodiment and are not intended as to this
The restriction of invention.Unless the context clearly indicates otherwise, then singular intention also includes plural form.
When the terms " comprising " and/or " comprising " are used in this specification, these terms specify the feature, whole
The presence of body, step, operations, elements, and/or components, but be also not excluded for more than one other feature, entirety, step, operation,
The presence of component, assembly unit and/or its group and/or additional.
About embodiment:
Referring to Figure 1, Fig. 1 is the block diagram for the better embodiment that magnetic card of the present invention reads system.The magnetic card is read
The better embodiment of system includes magnetic head 1 and system primary processor 2, and the magnetic head 1 is electrically connected with system primary processor 2.
The magnetic head 1 includes magnetic coupling medium 10, electromagnetic induction circuit 11, signal amplification and shaping circuit 12.The magnetic
Couplant 10 is with electromagnetic induction circuit 11 for coupling with magnetic card and generating electric signal.The signal amplification and shaping circuit 12
Be electrically connected with electromagnetic induction circuit 11, signal amplification and shaping circuit 12 for being amplified to generated electric signal and
Shape correction, to form pulse signal.In present embodiment, the electromagnetic induction circuit 11, signal amplification and shaping circuit 12
It is more mature in digital-to-analogue field, therefore repeat no more.
The system primary processor 2 amplifies with signal and shaping circuit 12 is electrically connected, for receiving the pulse signal, and
The pulse signal received is decoded and is verified to obtain the data on the magnetic stripe of magnetic card.In present embodiment, the arteries and veins
Rushing signal is square-wave signal.
Specifically, the magnetic head 1 is drawn by universal input/output of conducting wire and system primary processor 2 in present embodiment
Foot is connected, and the magnetic head 1 is three rail magnetic tracks, including three magnetic tracks, and corresponding, the system primary processor 2 includes three general
Input/output pin.That is, three universal input/output pins of the system primary processor 2 by three conducting wires with
The output end of signal amplification and shaping circuit 12 is connected the pulse signal ready to receive from entire magnetic head 1.In order to timely locate
The pulse signal from magnetic head 1 is managed, in present embodiment, the system primary processor 2 is by three of them universal input/output pin
The interruption reported is set as the highest priority interrupt of the system primary processor 2, for example, using FIQ quick-speed interruption mechanism or
The non-maskable interrupts mechanism of NMI.Amplify when universal input/output pin of the system primary processor 2 is received from signal
And shaping circuit 12 export pulse signal when, during universal input/output pin of the system primary processor 2 can generate simultaneously
Disconnected request causes the system primary processor 2 unconditionally to be switched to handle 1 institute of magnetic head according to pre-set highest priority interrupt
The pulse signal of transmission.That is, above-mentioned interrupt requests are set in advance as system primary processor by the system primary processor 2
2 highest priority interrupt, to ensure the currently running program of unconditional interrupt.When system primary processor 2 receives interrupt requests
Enter high-priority interrupt mode afterwards and receives pulse signal transmitted by magnetic head.The system primary processor 2 is to pulse signal
It is specific processing be that three GPIO pins of the system primary processor 2 monitor rising edge and the decline of the square-wave signal
Edge, and interruption is generated, therefore can recorde pulse and then obtain F2F encoded information.
In the present embodiment, the system primary processor 2 can be the processor of ARM framework, certainly, other embodiments
In, the system primary processor 2 also can be the processor or MCU of other frameworks, and operating system (OS) is run by.When pulse is believed
Number collect after, return to OS running environment, (i.e. universal input/output of system primary processor 2 is drawn after judgement is swiped the card
After foot stopping receives pulse signal), that is, the decoding software that brings into operation is decoded and is verified to F2F encoded information, finally obtains magnetic
Data on item.
In present embodiment, pulse signal caused by the magnetic head 1 is transmitted directly to the general defeated of system primary processor 2
Enter/output pin, do not need to reuse other buses and carry out data transmission, interface is simple, and drive software is also simple, greatly drops
Low cost.
It is the flow chart of the better embodiment of magnetic card read method of the present invention please continue to refer to shown in Fig. 2.The magnetic card
The better embodiment of recognition methods the following steps are included:
Step S1: generated electric signal carries out signal amplification and shaping when will be with magnetic card magnetic coupling, to form pulse letter
Number.
Step S2: by universal input/output pin of output of pulse signal to system primary processor 2, so that the main place of system
After reason device 2 is decoded and verifies to pulse signal, the data on the magnetic stripe of magnetic card are obtained.
In present embodiment, in step S2, come when universal input/output pin of the system primary processor 2 receives
From magnetic head export pulse signal when, universal input/output pin of the system primary processor 2 can generate interruption, institute simultaneously
Currently running journey will be interrupted according to FIQ quick-speed interruption mechanism or the non-maskable interrupts mechanism of NMI by stating system primary processor 2
Sequence, to switch to handle pulse signal transmitted by magnetic head.
It is the flow chart of another better embodiment of magnetic card read method of the present invention please continue to refer to shown in Fig. 3.Institute
State another better embodiment of magnetic card read method the following steps are included:
Step S100: it is connected by universal input/output pin with magnetic head to receive pulse signal transmitted by magnetic head.
Step S200: by the pulse decoding received and verification to obtain the data on the magnetic stripe of magnetic card.
In present embodiment, step S100 further include: arteries and veins transmitted by magnetic head is being received by universal input/output pin
It rushes in signals step, further includes: interrupt requests are generated using universal input/output pin in return pulse signal, with quick
It interrupts, and switchs to receive the pulse signal.Specifically, universal input/output pin will generate when receiving pulse signal
Interrupt requests, and currently running program is interrupted according to FIQ quick-speed interruption mechanism or the non-maskable interrupts mechanism of NMI, to turn
For pulse signal transmitted by processing magnetic head.
The above is only embodiments of the present invention, are not intended to limit the scope of the invention, all to utilize the present invention
Equivalent structure or equivalent flow shift made by specification and accompanying drawing content is applied directly or indirectly in other relevant technologies
Field is included within the scope of the present invention.
Claims (6)
1. a kind of magnetic card reads system, including magnetic head, the magnetic head include the magnetic coupling for electric signal to be coupled and generated with magnetic card
Close medium and electromagnetic induction circuit, for amplifying to generated electric signal and the circuit of Shape correction, the electric signal
By amplifying and forming pulse signal after shaping；It is characterized by also including the system main process tasks that one is electrically connected with the magnetic head
Device, the system primary processor for receiving the pulse signal, and by the pulse signal received be decoded and verify with
Obtain the data on the magnetic stripe of magnetic card；The magnetic head is connected to incite somebody to action with universal input/output pin of the system primary processor
The pulse signal is sent to the system primary processor；When the magnetic head is by the output of pulse signal to the main place of the system
When managing universal input/output pin of device, universal input/output pin issues interrupt requests, the system to system primary processor
Above-mentioned interrupt requests are set in advance as the highest priority interrupt of system primary processor by system primary processor, to ensure in unconditional
Break currently running program；System primary processor enters highest priority interrupt mode after receiving interrupt requests and receives magnetic head institute
The pulse signal of transmission.
2. magnetic card as described in claim 1 reads system, it is characterised in that: in the highest priority of the system primary processor
Off line is made as FIQ quick-speed interruption mechanism.
3. magnetic card as described in claim 1 reads system, it is characterised in that: in the highest priority of the system primary processor
Off line is made as the non-maskable interrupts mechanism of NMI.
4. magnetic card as described in claim 1 reads system, it is characterised in that: the magnetic head is three tracks head.
5. magnetic card as described in claim 1 reads system, it is characterised in that: the system primary processor is the place of ARM framework
Manage device.
6. a kind of magnetic card read method, comprising the following steps:
It is connected by universal input/output pin with magnetic head to receive pulse signal transmitted by magnetic head；
Highest priority interrupt is generated using universal input/output pin in return pulse signal, with quick-speed interruption, and is switched to
Receive the pulse signal；And
By the pulse decoding received and verification to obtain the data on the magnetic stripe of magnetic card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510815697.2A CN105469012B (en) | 2015-11-23 | 2015-11-23 | Magnetic card reads system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510815697.2A CN105469012B (en) | 2015-11-23 | 2015-11-23 | Magnetic card reads system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105469012A CN105469012A (en) | 2016-04-06 |
| CN105469012B true CN105469012B (en) | 2019-01-18 |
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ID=55606690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510815697.2A Active CN105469012B (en) | 2015-11-23 | 2015-11-23 | Magnetic card reads system and method |
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| Country | Link |
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| CN (1) | CN105469012B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184291A (en) * | 1996-08-30 | 1998-06-10 | Ncr国际公司 | Magnetic card reader |
| CN201392524Y (en) * | 2009-04-08 | 2010-01-27 | 洪炜栋 | Digital magnetic head of magnetic card reader |
| CN203149709U (en) * | 2013-03-15 | 2013-08-21 | 青岛海信智能商用系统有限公司 | Security encryption magnetic head module |
| EP2916323A1 (en) * | 2012-10-30 | 2015-09-09 | Hitachi-Omron Terminal Solutions, Corporation | Magnetic card reader and magnetic card reading method |
-
2015
- 2015-11-23 CN CN201510815697.2A patent/CN105469012B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1184291A (en) * | 1996-08-30 | 1998-06-10 | Ncr国际公司 | Magnetic card reader |
| CN201392524Y (en) * | 2009-04-08 | 2010-01-27 | 洪炜栋 | Digital magnetic head of magnetic card reader |
| EP2916323A1 (en) * | 2012-10-30 | 2015-09-09 | Hitachi-Omron Terminal Solutions, Corporation | Magnetic card reader and magnetic card reading method |
| CN203149709U (en) * | 2013-03-15 | 2013-08-21 | 青岛海信智能商用系统有限公司 | Security encryption magnetic head module |
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| Publication number | Publication date |
|---|---|
| CN105469012A (en) | 2016-04-06 |
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Address after: 518000 Room 17A, Tairan Jinsong Building, Chegongmiao Industrial Zone, Shennan Road, Futian District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Xinguodu Co.,Ltd. Address before: 518000 Room 17A, Tairan Jinsong Building, Chegongmiao Industrial Zone, Shennan Road, Futian District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN XINGUODU TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20220816 Address after: 518000 17b, Jinsong building, Tairan 4th Road, Shatou street, Futian District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Xinguodu Technology Co.,Ltd. Address before: 518000 Room 17A, Tairan Jinsong Building, Chegongmiao Industrial Zone, Shennan Road, Futian District, Shenzhen, Guangdong 518000 Patentee before: Shenzhen Xinguodu Co.,Ltd. |