Metal marker tag detection system based on eddy current technology

Abstract

The invention discloses a metal marker tag detection system based on an eddy current technology. The metal marker tag detection system comprises an alternating current signal generator, and the system further comprises a detection coil, a phase and amplitude detector, a direct current offset amplifier, an analogue-to-digital converter and a digital signal processor all which are sequentially connected, wherein the alternating current signal generator is respectively connected with the detection coil and the phase and amplitude detector. The beneficial effect of the system is that the metal marker tag detection system based on eddy current detection belongs to non-contact detection, is high in detection speed, and easy to realize automatic detection. The detector is high in sensitivity and the higher-density information can be recorded. The detection system is small in volume and can form portable detection equipment.

Description

Technical field [0001] The invention relates to the technical fields of AC magnetic field measurement, electromagnetic detection technology, and eddy current detection technology, in particular to a metal label detection system adopting eddy current technology. Background technique [0002] The perception and collection of item information is an important part of the Internet of Things system. At present, several major item identification technologies (barcode, RFID, magnetic stripe) have problems such as easy damage and relatively high prices. Moreover, these information recording technologies are only suitable for short-term use occasions such as the production, storage and circulation of articles, and cannot be used for a long time in humid, large temperature difference, and pollution environments such as the open air, underground, and wild. [0003] Existing long-term use of item information records, such as motor, engine nameplate, gas and liquid storage tank labels, and other...

AI Technical Summary

Problems solved by technology

[0002] The perception and collection of item information is an important part of the Internet of Things system. At present, several major item identification technologies (barcode, RFID, and magnetic stripe) have problems such as easy damage and relatively high prices.

Moreover, these information recording technologies are only suitable for short-term use occasions such as the production, storage, and circulation of items, and cannot be used for a long time in open air, underground, and outdoor environments such as humidity, large temperature differences, and pollution.

[0003] Existing item information records that have been used for a long time, such as motor, engine nameplate, gas and liquid storage tank labels and other item information records, use words or letters to engrave on the metal surface of the item, the amount of information is small, and it cannot be automatically identified

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