Access control system coil
The hollow inductor of the access control system has the characteristics of simple structure, artificial mucous membrane, high inductance precision, small distributed capacitance, high self-harmonic frequency, small temperature coefficient, good stability, strong anti-interference ability, etc. It is an inductor that can be applied at high frequency. The access control system coil can usually be used as a current transformer, with a wide frequency band, small size, light weight, easy digital measurement, and microcomputer protection. Mainly used in all kinds of access control systems, attendance systems, punch card systems, etc.
The principle of access control system hollow inductor is to use all kinds of wire materials (0.012-2mm), which can be produced in accordance with the requirements of high-quality winding, welding, measurement and other automatic or semi-automatic processes; There are many forms of access control card induction coil antenna, which can be divided into sending antenna and receiving antenna according to its use; According to the use of the band can be divided into long, medium, short, ultra-short wave antenna and microwave antenna, microstrip antenna and so on.
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