JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (4): 83-88.doi: 10.6040/j.issn.1672-3961.0.2016.112

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High precision algorithm of metal detector based on balance coil

BAI Shuzhong1, DONG Chunyang2*   

  1. 1. School of Electrical Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. Jinan Branch, China United Network Communication, Jinan 250002, Shandong, China
  • Received:2016-04-03 Online:2017-08-20 Published:2016-04-03

Abstract: Metal detector is widely used in food security and industrial manufacture. In order to solve the product effect problem which used only amplitude feature, the dual channel digital detecting algorithm was put forward based on amplitude and phase information, also the balance coil mathematical model was built, and the metal signal feature was deeply analyzed. Through the coordinate orientating,the amplitude and phase information of metal could be exactly extracted, product learning and clustering algorithm could efficiently separate the metal signal and product effect signal. The experiment results showed that the phase information could separate different material metal effectively, cooperated with the amplitude information, the dual channel digital detecting algorithm could extract the metal information accurately and detect the metal with strong product effect.

Key words: product effect, balance coil, detection algorithm, metal detection, eddy current

CLC Number: 

  • TP391
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