An Improved Device of Detecting True and False Coin

摘要：

　　In order to reduce the loss of an automatic coin machine for using a l-Yuan false coin,an improved device is designed by applying the eddy current nondestructive testing technology,which uses two distinct frequency signals to detect the information of coin.The device includes four modules:two LC oscillating circuits,signal processing module,microprocessor module and external control circuits.The detection algorithm selects two counting values under two distinct frequency signals.The low frequency circuit detects the information of the coin material,and the high frequency circuit detects the feature of the coin surface.The detection region of true coin is decided by the method of least square.The experiment shows that the device has the characters of stability,reliability and high accuracy.

关键词： eddy current detection coin detection false coin method of least square

作者: Chunhe Yu Xiaofeng Tian Danping Zhang

作者单位: Department of Electronic and information Engineering,Shenyang Aerospace University Shenyang,110136 P.R.China

会议类型: 国际会议

会议名称: the 2012 2nd International Conference on Frontiers of Manufacturing Science and Measuring Technology (第二届制造科学与检测技术国际会议(ICFMM 2012))

会议地点: 西安

会议语种:英文

页码: 1589-1592

在线出版日期: 2012-06-12（万方平台首次上网日期，不代表论文的发表时间）