How Do The Security Gates Of Entertainment Establishments Detect Metal Substances?

- Apr 15, 2019-

Entertainment walk through security gates are often seen in public places such as stations, museums, cinemas and so on. Entertainment security gates are used to check whether our personal belongings are prohibited metal objects, etc. What's the principle of security checks in entertainment places? How did he detect whether there were metal objects?

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When we pass through the security gates of entertainment places, if the number, weight and shape of the metal exceeds the pre-set parameters, the security gates will immediately alarm and show the location of the metal. The reason why security gates can detect metal materials is that the door panels on both sides of security gates are equipped with devices that emit and receive alternating electromagnetic fields. It uses the principle of electromagnetic induction: a coil passing through AC generates a rapidly changing magnetic field, which can induce eddy current inside a metal object; eddy current generates a magnetic field, which in turn affects the original magnetic field and causes the sounds of the detector. Entertainment security gates are applicable to public security bureaus, procuratorates, prisons, gymnasiums, entertainment venues, railway stations, electronics, wires and cables, electrical appliances manufacturers and so on.


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