Realization of digital signal processor based metal detector

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Dr. Orosz György
Department of Measurement and Information Systems

In history metals always played an important role. Money, pottery, jewelery, weapons and in many other cases metals played an important role. Because of their importance in history, several means of metal detection have also been developed with the help of electronics. Besides their solidity, their electrical conductivity is one of their important features. This, and also ferromagnetism makes it possible to detect metals. Through these features, metals change the electromagnetic field generated by the detector, which is sensed by the detector.

Most of metal detectors in use today have one sensor that has to be moved to the side directions while moving forward. These give a sound when detecting metals. The purpose of this thesis is to create a prototype of such a metal detector that does not need to be moved to the side, only scan the area that is suspected to contain metal. It does not sign by sound, but it presents a 3D image of pieces of metals under the soil on PC, and in lack of a computer it gives light sign of different colours depending on the type of metal.


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