Card, English name: magnetic card. A card-like magnetic recording medium, complexation with a variety of readers. Card is to use a magnetic carrier records some information used to identify the identity card or other purposes. Mainly used in electronics technology, it is a type of electronic terms. 1 Basic profile depending on the use of different substrates, magnetic card can be divided into PET, PVC card and paper card three; depending on the magnetic layer structure is different, it can be divided into two kinds of magnetic stripe cards and full coat. Magnetic easy to use, inexpensive to extremely versatile, it can be used to produce the letter * card, silver * cards, subway cards, bus cards, ticket cards, power * card; electronic game cards, tickets, machine guns and various traffic charges card . In many cases we will use magnetic cards, such as canteen, in a shopping mall, bus, playing electric *, enter restricted areas and so forth. Categories: magnetic stripe types: general anti-magnetic card (300oe) high resistance to magnetic card (3500oe) directly applied to the printed type: low resistance to magnetic card (300oe) (eg: Park tickets) high resistance to magnetic card (2700oe) (eg: Metro cards, electricity * card) 2 historical overview of the use of the card has a long history. Because of low magnetic-cost, easy to use, easy to manage, and has a certain security features, so it's been a lot of development of world-renowned companies, especially government ministries utmost support for decades, so the card application is very popular all over the national life aspects. * You can use the card to play power, the plane ticket can use the card, the stock market can be used magnetic cards, and so on, it is worth mentioning that the decades of widespread promotion of the use of the banking system so that card penetration has been a great development. US average (adult) who have as many as four types of magnetic cards, Singapore has a similar penetration. In the United States and other developed countries, due to the card is widely used in banking, securities * and other systems, magnetic card application system is perfect, if the existing applications of these magnetic cards, including Visa card * MasterCard card applications including all replaced We are increasingly sophisticated smart card system, then at least put in billions of dollars each year, and will seriously affect the normal operation of nationals living habits and application systems and the like. This is also the smart card system in the United States than the European countries to slow the development of the reason. In the future for a long period of time such as the United States in particular a bank card application system is highly developed countries, bank card application system with smart card applications to co-exist in a complementary manner. The overall security and confidentiality of the smart card is indeed better than the card, but very sound card applications (such as the banking system) to make up for the lack of the presence of the card itself on its security and confidentiality features, so the user experience is not significantly both Security features are different kinds of cards and affect the use and so on. 3 magnetic stripe magnetic strip is a thin layer of material from the arrangement of the iron oxide particles oriented composition (also called pigment). Bonded together with a resin binder closely, and bonded to the paper or plastic such as a non-magnetic substrate media. Essentially sense the magnetic stripe and the computer tape or disk is the same, it can be used to record letters, characters and digital information. Plastic or paper firmly together by adhesive or magnetic form heat. Information contained in the magnetic strip is generally longer than the barcode big. Magnetic stripe can be divided into three separate tracks, called TK1, TK2, TK3.TK1 up to write 79 letters or characters; TK2 can write up to 40 characters; TK3 can write up to 107 characters. There are three tracks on the magnetic stripe track magnetic stripe 4. Track 1 and Track 2 is a read-only track record in the use of the track information can only be read and not allowed to write or modify. Track 3 is read and write tracks, can be read in the use, you can also write. Track 1 can record number (0-9), letters (A-Z), and other symbols (such as brackets, separator, etc.), the largest recorded 79 numbers or letters. Track 2 and recorded three characters can only be numbers (0-9). Track 2 recorded maximum 40 characters, Track 3 recorded maximum 107 characters. Principle 5 record the recording head from the inside there is a gap of annular core and wound on the core line graph composition. Magnetic film base is made of a certain material and uniformly coated film base is made in the above particulate magnetic material. During recording, the magnetic surface of the magnetic card to move at a constant speed, or a recording head moving at a constant speed, and the magnetic head and the magnetic recording gap or the contact surface, respectively. Once the head of the current through the coil, the gap at the generated current is proportional to the magnetic field, so the card with the contact portion of the gap magnetic body was magnetized. If the recording signal current varies with time, when the magnetic material through the gap on the magnetic card (magnetic or because the head is moving), and will change with the current to be magnetized to varying degrees. After the card is magnetized, leaving voids in the magnetic layer of the card on the left corresponding to the current changes in the residual magnetism. If the current signal (or magnetic field strength) by sine law change, then the residual magnetic flux on the magnetic card also varies by sine law. When the current is positive, it caused a left to right (from N to S) of the magnetic polarity; When the current is reversed, the magnetic polarity reverse followed. The end result can be seen on the card and then return from N to S to N of a wavelength can also be seen as a phase of the two magnets of the same polarity. This is to some extent a result of simplified, however, it must be remembered that the remanence Br is sinusoidal variation. When the signal current maximum longitudinal magnetic flux density is maximized. Recording signal is in the form of a sinusoidal variation remanence records stored on the card. 6 works on top of the residual magnetic flux density Br card plays a decisive role in the work process. Card containing a certain speed through the work coil head, the external magnetic field lines of the magnetic coil cut, an induced electromotive force generated in the coil, so that the transmission of the signal to be recorded. Of course, also required to work in magnetic recorded signal has a wide frequency response, less distortion and a high output level. A very thin metal line can be used as a simple playback device. Metal straight and close the card, a direction perpendicular to the direction of the magnetic card, card runs, metal straight cutting magnetic field lines generated by the induced electromotive force, proportional to the magnetic lines of force of the size and cut. When the running speed of the card remains the same, EMF and magnetic surface of the metal line residual magnetic flux density is proportional to the conductor of the induced electromotive force can be expressed as: e = BrWv formula Br- surface residual magnetic flux density; W- record Road track width; v- playback speed when the magnetic card. In Br = 2πf / vφrmcos2πft case, comprehensive relationship Br and e, obtained e = 2πfWφrmcos2πft. Of course, with a metal wire for magnetic work equipment, the output is very small, and therefore is not practical. The head is the core of soft magnetic material made of a high magnetic permeability above wound with windings, front head there is a very narrow gap, then head of the magnetic flux into the work, it can be seen as two Effective reluctance parallel, that gap reluctance and magnetoresistive head core. Because the gap is much larger than the effective reluctance of the core work magnetoresistive head, so the majority of magnetic flux is input to the magnetic head core, and the occurrence of cross-linking with the working head coil windings, so that induced electromotive force, in this case induced electromotive force equation, the reproduced single metal wire is fully applicable to the obtained toroidal magnetic head work, but the scale factor is different. Let N be the number of turns of the coil, the induced electromotive force and the size m of the magnetic head and the magnetic core of the work-related factors, the annular working head winding is produced: e = 2πfWmNφrmcos2πft work because the magnetic force induced in the winding is proportional the rate of change in magnetic flux that force eαByα frequency f. When recording i = Isinwt, longitudinal remanence density Bxαi (passed straight portion of the curve), so that, Bx = K1Isinwt. Since Byαdbx / dt, eαBy, therefore, e = K2Iwcoswt. K2 here depends on the operating efficiency of the head, turns, tape materials. These formulas also show that: the output voltage is proportional to the current record; the output voltage is proportional to the signal frequency; output voltage to obtain a corresponding change of 90 ° (ie, to change the sine cosine). 7 International Standard 1, ISO7810: 1985 Identification cards - Physical characteristics defines the physical characteristics of the card, including card materials, construction, dimensions. Size cards is: the width of 85.72mm ---- 85.47mm height 54.03mm ---- 53.92mm thickness 0.76 ± 0.08mm 3.18mm radius corners card Generally speaking card size: 85.5X54X0.76 2, ISO7811- 1: 1985 Identification cards - Recording technique - Part 1: Embossing specifies the requirements (character sets, fonts, character spacing and character height) on the card embossed characters. 3, ISO7811-2: 1985 Identification cards - Recording technique - Part 2: Magnetic stripe specifies the characteristics of the magnetic stripe on the card, the encoding technique and coded character sets. 4, ISO7811-3: 1985 Identification cards - Recording technique - Part 3: the ID-1 type card position 5 embossed characters, ISO7811-4: 1985 Identification cards - Recording technique - Part 4: read-only tracks 1, 2 tracks position 6, ISO7811-5: 1985 Identification cards - Recording technique - Part 5: read and write tracks - Track position 8 Caution 1, magnetic stripe cards will be subject to interference by outside factors. 2, magnetic stripe cards in your wallet, wallet distance Cikou too close, even in contact with the magnetic button happen. 3, Ms. purses, men's handbag Cikou too close or touching. 4, in contact with the contacts with magnetic seal, notebook. 5, the contact with the mobile phone sleeve Cikou, car keys and other magnetic objects. 6, with mobile phones and other devices capable of generating electromagnetic radiation for a long time together. 7, and television sets, tape recorders and other household appliances from the effects of a strong magnetic field is too close. 8, when used in supermarkets, and supermarkets degaussing device tamper too close and even touch. 8, a plurality of magnetic stripe cards together, the two cards magnetic stripe contact with each other. 9. In addition, the magnetic stripe card pressed, folded, long clash, exposure, temperature, magnetic stripe scratch dirty, also make regular use of magnetic stripe cards can not *. Meanwhile, process credit card transactions on the card is in, clean the heads, the age of the data transfer process by interference, system malfunction, cashier so may result in improper operation of magnetic stripe cards can not be used. 9 How to distinguish the smart card, IC cards, ID cards and magnetic smart cards, also known as IC card is readable and writable chip cards. Depending on the storage capacity is divided into different types of chips, is now the most used type of chip Philips S50, Philips S70, Fudan FM1108, AT24C64, AT24C04 other common chip, with the development of the market, the amount of IC card in gradually instead of the traditional membership cards, magnetic and barcode cards. IC card only it will be widely used because IC cards and ID cards, magnetic cards, barcode cards compared with the greater security, password module IC card chip, you can put the password written inside, through after password verification to read the card information, greatly enhance the security of the card. ID card is read-only chip card, the chip inside information is written in advance of the serial number, the serial number is the world's unique serial number, is read the serial number can not be changed, so the use of ID cards in the software, in fact, Just try ID card inside the identification number * be on the local computer or server, which uses the principle of magnetic stripe cards and not much different from members or store information, the main difference is the usage behavior, ID cards is inductive read access information, the read magnetic stripe cards are credit card information, ID cards is the chip, not easily damaged, magnetic stripe cards are easily demagnetized. Barcode card magnetic stripe cards and try the same basic principle, through card reading information about the membership information are also stored on the local computer or server, but that is a different magnetic stripe card is a magnetic stripe storage card, barcode card printers through the bar code printed on the card, and then identified by scanner. Minimum security card and bar code card, you can always copy a new magnetic stripe cards. The only advantage is the low cost. Shenzhen cartoon smart card company, specializing in the production of smart cards, chip cards, IC cards, ID cards, magnetic stripe cards, membership cards, VIP cards, VIP cards, loyalty cards, U disk cards. Our company based on domestic and foreign throughout the country, to introduce the most advanced equipment, Heidelberg four-color offset press, using advanced printing ink, HD fidelity, bright color, do not fade, do not fade, ten professional card, tried and tested, the largest card manufacturers. We focus on quality, provide quality services, the company's strong productivity, well-equipped, cheap and fast shipping, global shipping! Seiko secret agents, gold quality, stand the world! Service hundred satisfied hundred in cartoon smart card that you deserve! Cartoon Shenzhen Smart Card Technology Co., Ltd. Contact: Zhang: 18719272597 QQ: 2638726267 Tel: 0755-25125158 Website: www.zktcard.com Marketing Center: Luohu District, Shenzhen Huangbeiling Rosa Road Yinfeng Building Set 8A 5097