现代电子技术Issue(4)：137-141,144,6.
基于双联对置传感器的硬币机读特征检测系统
System based on dual opposed sensor for detecting machine-readable features of coins
张武军 1司峻峰 2黄晓林2
作者信息
- 1. 南京中钞长城金融设备有限公司，江苏 南京 210029
- 2. 南京大学 电子科学与工程学院，江苏 南京 210093
- 折叠
摘要
Abstract
Coins’electromagnetic parameters related to automatic coin recognition are called coin machine readable fea-tures. Traditional method of automatic coin recognition has big defection temperature drift,poor consistency,sole detecting pa-rameter and so on. In this paper,the method to detect complex impedance variation of coin machine readable feature detecting coil is proposed in this paper. The detecting system can generate orthogonal excitation signal,which has perfect waveform,and stable frequency,phase and amplitude. By the relevant detection method,the circuit can essentially improve the ability to cap-ture the weak signal formed by the difference between coins. It is conducive to the realization of online detection for coin ma-chine readable features. The system can effectively overcome the temperature drift and improve the dynamic range of signal by using dual opposed eddy current sensor. Every coin can be detected twice,thus more accurate results can be obtained by data processing. The testing results show that the system can detect the tiny difference of coin machine readable feature,and has good stability and repeatability.关键词
复阻抗/双联对置涡流传感器/相敏检测/硬币机读特征Key words
complex impedance/dual opposed eddy current sensor/phase sensitive detection/coin machine-readable feature分类
信息技术与安全科学引用本文复制引用
张武军,司峻峰,黄晓林..基于双联对置传感器的硬币机读特征检测系统[J].现代电子技术,2014,(4):137-141,144,6.
