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Metal marker tag detection system based on eddy current technology

A metal label and detection system technology, applied in the field of metal label detection systems using eddy current technology, can solve the problems of long-term use, inability to automatically identify, high relative price, and achieve the effects of high detection speed, small size and high sensitivity

Inactive Publication Date: 2015-05-13
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Metal marker tag detection system based on eddy current technology
  • Metal marker tag detection system based on eddy current technology

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Embodiment Construction

[0017] Such as figure 1 , 2 As shown, the present invention discloses a metal label detection system using eddy current technology, which includes an AC signal generator 1, and a detection coil 2, phase amplitude / detector 3, DC offset / amplifier 4, analog / digital The converter 5 and the digital signal processor 6, the AC signal generator 1 is respectively connected to the detection coil 2 and the phase amplitude / detector 3, and the detection coil 2 is wound on the outer surface of the magnetic core 8; The detection coil 2 of the magnetic core 8 is excited by the alternating current to induce a vortex current on the surface of the metal plate. The magnetic field generated by this current reacts to the magnetic field of the coil. When different metal symbol patterns appear under the detection coil 2, both ends of the coil The voltage produces different amplitude and phase changes. After processing by the amplitude / phase detector 3, DC offset and amplification, the output signal is ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12
CPCG01R33/12
Inventor 许洪光张霆廷朱晖张钦宇
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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