Research on soft and hard magnetic anti-counterfeiting material detection based on electromagnetic sensor

SUN Rui; HUANG Bo; PENG Zheng-chun

doi:10.13873/J.1000-9787(2019)04-0125-03

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Research on soft and hard magnetic anti-counterfeiting material detection based on electromagnetic sensor

更新时间：2025-09-11

- Research on soft and hard magnetic anti-counterfeiting material detection based on electromagnetic sensor
- Issue 4, Pages: 125-127+131(2019)
- 作者机构：
  
  1. 深圳大学光电工程学院光电子器件与系统(教育部/广东省)重点实验室
  2. 深圳怡化电脑股份有限公司
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2019)04-0125-03
  CLC： F820;TP212.1
- Published：2019
- 稿件说明：
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SUN Rui, HUANG Bo, PENG Zheng-chun. Research on soft and hard magnetic anti-counterfeiting material detection based on electromagnetic sensor[J]. 2019, (4): 125-127+131.
DOI：

SUN Rui, HUANG Bo, PENG Zheng-chun. Research on soft and hard magnetic anti-counterfeiting material detection based on electromagnetic sensor[J]. 2019, (4): 125-127+131. DOI： 10.13873/J.1000-9787(2019)04-0125-03.

摘要

针对现有金融货币鉴伪识别过程中的磁性检测

仅能检测出磁性信号的有无

无法实现磁性防伪材料软硬磁性质的检测。提出了一种电磁传感器

对新版100元纸币的磁性防伪材料进行了检测。通过Maxwell电磁仿真研究了电磁传感器的磁场分布特性。由于软硬磁防伪材料的矫顽力不同

使得其输出的漏磁特征信号有明显的区别

其中软磁区域为高频的包络曲线。根据输出信号的特征不同

可以鉴别出磁性防伪材料的软硬磁性质

进而可以进一步提高鉴伪识别的精度和可靠性。

Abstract

The existing magnetic detection in the process of financial currency identification can only detect the presence or absence of magnetic signals

and can not realize the detection of soft and hard magnetic properties of magnetic anti-counterfeiting materials. An electromagnetic sensor is proposed

which is used to test the magnetic anti-counterfeiting material of the new 100 yuan banknote. The magnetic field distribution characteristics of the electromagnetic sensor are studied by Maxwell electromagnetic simulation. Because of the different coercivity of soft and hard magnetic anti-counterfeiting materials

the output characteristic signals of magnetic leakage are obviously different

in which the soft magnetic region is the envelope curve of high frequency. According to the different characteristics of the output signal

the soft and hard magnetic properties of magnetic anti-counterfeiting materials can be identified

which can further improve the precision and reliability of anti-counterfeiting recognition.

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