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《Journal of Anhui Institute of Architecture & Industry(Natural Science)》 2007-03
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Design of a metal detector

ZHANG Xue-yong,ZHAO Qun,LI Yi-bao,TANG Zhen (Department of mathematics & physics,Anhui institute of architecture & industry,Hefei 230022,China)  
In order to improve anti-jamming ability and overcome a larger amount of false alarms in traditional portable metal detectors,a new type of metal detector based on the principle of the F/V conversion is presented.A Siller's oscillator circuit of three-point capacitance acting as the detector oscillator,a phase-locked loop circuit and a window comparator converted the change of frequency into that of the voltage.Preliminary experimental results showed the metal detector with high sensitivity and stability can not only detect the positions of metals,but also can determine the detected metals.
【Fund】: 安徽省教育厅自然科学基金资助项目(2005KJ228);; 安徽省教育厅教研基金资助项目(2005271)
【CateGory Index】: TP21
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