Access card induction coil for to explain the principle of access control induction system
The use of self-adhesive coils in many industries, including in the use ofaccess control card is also increased a lot, people in the use of process just feel very convenient the induction system, but little to know about the principle of the induction system.
Access control induction system from one access card induction coilcomponent, and access control induction system can also rely on the success of induction coil, it is the principle of card reader to electromagnetic wave with certain frequency sends out, when the frequency is 13.56MHZ card in the electromagnetic wave radiation range, the coil will induction card thegenerated current, have an antenna sensor, and the antenna will put thecurrent to the inductor, and this information will be converted to digital serial number and sent to the local controller in the local controller, will this information on to the upper controller, the upper controller will send theseinformation is transmitted to the access control system is compared with the database, comparative success after the entrance guard system will open.
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Source: http://m.feitui.com.cn (reproduced please specify the reproduced source)
