The magnetic stripe card is a liquid magnetic material or a magnetic strip as an information carrier, and the liquid magnetic material is coated on a card (such as a passbook) or a magnetic strip having a width of about 6-14 mm is pressed onto the card. This article introduces the working principle of the magnetic stripe card.
The magnetic stripe card is generally used as an identification card, and can write, store, and rewrite information content. The features are high reliability, high recording data density, low misreading rate, and fast information input and reading speed. Since the information reading and writing of the magnetic card is relatively simple and easy, easy to use, and low in cost, it has been developed earlier and has entered various application fields such as finance, finance, post and telecommunications, communication, transportation, tourism, medical, education, and hotels. Wait.
How magnetic stripe cards work
The RF reader sends a set of electromagnetic waves of fixed frequency to the IC card. The card has an IC series resonant circuit whose frequency is the same as the frequency of the reader, so that under the excitation of the electromagnetic wave, the LC cooperative circuit generates resonance. There is a charge in the capacitor; at the other end of the charge, a single-pass electronic pump is connected to store the charge in the capacitor to another capacitor. When the accumulated charge reaches 2V, the capacitor can be used as a power source. Provide working voltage for other circuits, transmit data from the card or accept data from the reader.
According to the ISO7811/2 standard, the first track can store 76 alphanumeric characters and is read-only after being first magnetically written; the second track can store 37 numeric characters and is also read-only; The track can store 104 digital characters, which are readable and writable, and the bank card is used to record information such as book balance. The position of the three tracks on the card is strictly defined in the international standard ISO007811/5. The above is the introduction of the working principle of the magnetic stripe card for the editor of the China Security Network. I hope everyone can learn more about the magnetic stripe card.
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