温宗周,薛冬旺,刘亮.基于ARM Cortex-M3的声磁EAS设计[J].电子测量技术,2017,40(6):165-169
基于ARM Cortex-M3的声磁EAS设计
Acoustic magnetic EAS system based on ARM Cortex M3
  
DOI:
中文关键词:  声磁  电子防盗系统  互相关  斜率  数字信号处理
英文关键词:acoustic magnetic  EAS  cross correlation  Slope  digital signal processing
基金项目:
作者单位
温宗周 西安工程大学电子信息学院西安710048 
薛冬旺 西安工程大学电子信息学院西安710048 
刘亮 西安工程大学电子信息学院西安710048 
AuthorInstitution
Wen Zongzhou College of Electrics and Information, Xi’an Polytechnic University, Xi’an 710048,China 
Xue Dongwang College of Electrics and Information, Xi’an Polytechnic University, Xi’an 710048,China 
Liu Liang College of Electrics and Information, Xi’an Polytechnic University, Xi’an 710048,China 
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中文摘要:
      针对普通EAS系统存在抗干扰性能差、检测灵敏度低、检测范围小、误报率高等缺点,设计了一种基于ARM Cortex M3的声磁EAS系统。介绍了声磁EAS系统的工作原理和硬件结构框图,分析了声磁标签信号在时域和频域上的特征,提出了FFT信号频谱分析、信号互相关、最小二乘法拟合直线求取斜率、计算信号峰值数及峰值方差运算等多种检测声磁标签信号的算法,并详细描述了系统软件算法的设计。经过实验验证,本系统具有抗干扰性能强、检测灵敏度高、检测范围宽、误报率低等特点。
英文摘要:
      An Acoustic magnetic EAS system based on ARM Cortex M3 is designed owing to bad anti jamming ability, detection sensitivity, low detection range and high rate of false positives faults in common EAS system.This paper introduces the working principle and hardware structure diagram of acoustic magnetic EAS system, analyses the acoustic magnetic tags signal in time domain and frequency domain characteristics, proposes FFT spectrum analysis, signal cross correlation, calculate the least squares fitting line slope variance calculation, calculation of signal peak value and peak varieties of acoustic magnetic tags signal algorithm, and describes the system software design of the algorithm in detail.The practice test proves that the system has strong anti jamming performance, high detection sensitivity, wide detection range, low rate of false positives, etc.
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