The access control reader coil is mainly used in various smart cards and access control systems. The most important core component of the access control card is the reader coil inside, which is called the access control card reader coil. It is very simple to distinguish the quality of the reader coil. Just look at the manufacturer of the reader coil inside the access card and the verification of the inspection of the access card.
Access control card reader coil principle:
Reader coils are produced by high-quality automatic and semi-automatic processes such as winding, welding, measurement, etc. using various wires (0.012-2mm). According to customer requirements, high-quality coils and high-quality raw materials are used to professionally produce various types of reading and writing. Reader coils, radio frequency coils, smart card reader coils, self-adhesive hollow reader coils and manufacture of various reader coils.
Features of Smart Card Reader Coil:
The reader coil has simple and reliable structure, only automatic winding machine, artificial mucosa, high inductance precision, small distributed capacitance, high self-resonant frequency, small temperature coefficient, good stability and strong anti-interference ability. The inductance of the application. The smart card reader coil can usually be used as a current transformer, which has the characteristics of wide frequency band, small size, light weight, easy digital measurement and microcomputer protection.
When you open the access card, in addition to the chip, there is a coil. What is this coil for?
The access control induction system is composed of an access control card reader coil, and the success of the access control induction system also depends on the effect of this coil. Its principle is that the card reader informs the outside world of electromagnetic waves of a specific frequency. When the frequency of the 13.56MHZ induction card is in the electromagnetic wave When within the radiation range, the coil on the proximity card will generate current, and the sensor has an antenna, which transmits the current to the sensor. This information will be converted into a digital serial number and sent to the local controller. When the local controller transmits this information to When the upper controller, the upper controller transmits this information to the access control system for comparison with the database. After the comparison is successful, the access control system will be opened.