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http://dx.doi.org/10.13067/JKIECS.2014.9.2.161

Characteristics of Metal Sensor using Variable Frequency  

Choi, Kyoo-Nam (인천대학교 정보통신공학과)
Publication Information
The Journal of the Korea institute of electronic communication sciences / v.9, no.2, 2014 , pp. 161-166 More about this Journal
Abstract
This Electromagnetic metal piece detection sensor, having high sensitivity even under high humidity and dust density, using LVDT was investigated. Metal detection characteristics using phase detection method, for 3 frequencies covering ELF and LF band, were experimentally measured. It was found that the sensitivity for metal and animal food, in which metal piece was included, was exponentially increased as frequency increased. Reducing cutoff frequency of LPF after PD was found to be effective to proportionally increase sensitivity. Also the sensitivity of metal piece detection was enhanced by optimizing BPF bandwidth and SNR. Metal piece detection limit using available ferrous test samples was found to be 0.7mm diameter from the experiment using 50kHz, in ELF band, which was known to have better selectivity to animal food. is an example of ABSTRACT format.
Keywords
Frequency Characteristics; Metal Detection; Metal Sensor; Phase Sensor;
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Times Cited By KSCI : 4  (Citation Analysis)
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