At present, there are many kinds of underground detectors, such as home-made ones, imported ones, probing disc ones, wide-range searching and scanning ones, visual imaging ones, pulse ones and so on.

As an emerging international strategic technology, the field of quantum information is facing fierce international competition, and its core component technology is affected by the international embargo. High-performance single-photon detectors, an indispensable core component of quantum regulation, were also under an international embargo.

Today, every time we go to a station, we will see the hand-held metal detectors used by security officers to screen passengers as they enter the waiting room. Yes, that's what we're talking about today: the importance of metal detectors in the security process at stations!

Metal detector is a kind of instrument specially used to detect metal substances. Now metal detector can detect the kind of metal besides whether there is metal between objects or objects. In archaeology, metal detectors can be used to discover ancient tombs where metal objects are buried, and to uncover gold and silver treasures, jewelry, and various coins and ceramics.