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Method, device and equipment for denomination recognition using security thread magnetic coding

A technology of magnetic coding and security thread, which is applied in the field of anti-counterfeiting, can solve problems such as wave peak instability and error, and achieve the effect of strong anti-counterfeiting function

Active Publication Date: 2022-04-01
武汉卓目科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of the prior art, to provide a method, device and equipment for denomination recognition using the magnetic code of the security thread, to solve or partially solve the difference in the state of the banknote counting machine and the change of the physical characteristics of the new version of banknotes. The wave peak instability and excessive error caused by the problem improve the accuracy and anti-counterfeiting strength of the magnetic feature detection of banknote security thread

Method used

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  • Method, device and equipment for denomination recognition using security thread magnetic coding
  • Method, device and equipment for denomination recognition using security thread magnetic coding
  • Method, device and equipment for denomination recognition using security thread magnetic coding

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Embodiment 1

[0062] see figure 1 , the present embodiment discloses a security thread magnetic code identification method, comprising:

[0063] Predefine templates for security thread magnetically encoded signatures of target genuine coins of each denomination;

[0064] Obtaining the peak distance of the magnetic one-dimensional characteristic signal of the security thread of the banknote to be identified includes: obtaining the magnetic characteristic signal of the security thread of the banknote to be recognized, extracting the peak characteristic of the magnetic characteristic signal of the security thread, and calculating the effective peak distance;

[0065] The peak spacing is normalized according to the code disc information to form samples to be matched. The sample to be matched is an array of peak distances.

[0066] Due to various reasons in different devices, the code disc sensors used in the input device may be different, and the final normalized parameters are obtained throu...

Embodiment 2

[0096] see figure 2 , the present embodiment discloses a device for denomination recognition using a security thread magnetic code, including a magnetic characteristic signal acquisition module, a magnetic characteristic peak distance acquisition module, a normalization module, an associative matching module, a score evaluation module, and a comprehensive arbitration module,

[0097] The magnetic characteristic signal acquiring module is used to acquire the magnetic characteristic signal of the security thread of the banknote to be identified.

[0098] Further, the magnetic characteristic signal acquisition module is used to obtain the magnetic characteristic signal generated by the security thread after the banknote passes through the device, including saturated amplified signals and non-saturated amplified signals, and the magnification factor is adjustable according to different parameters of the device.

[0099] The magnetic characteristic peak distance acquisition module...

Embodiment 3

[0121] see image 3 , this embodiment discloses a device for denomination identification using a security thread magnetic code, including a storage medium, the storage medium is used to store a program;

[0122] And a processor, the processor is used to implement the steps of the above-mentioned method of using the security thread magnetic code for denomination identification when executing the program;

[0123] And an input device, the input device is used to collect the one-dimensional signal of the magnetic coding feature of the safety thread, and transmit it to the processor; the input device can use a coil magnetic head, an excitation magnetic head or a TMR (tunneling magnetoresistance) magnetic head, etc.;

[0124] And an output device, the output device is used for displaying the result output by the processor. The output device can use LCD screen or digital tube, etc.;

[0125] When the banknote passes through the input device, the magnetic feature of the security th...

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Abstract

The invention discloses a method, device and equipment for identifying denominations using security thread magnetic coding. The method includes: predefining a security thread magnetic coding feature template for each denomination to be identified; acquiring the security thread magnetic feature signal of a banknote to be identified, And extract the peak characteristics of the magnetic characteristic signal of the security line, calculate the effective peak spacing; normalize the peak spacing according to the code disc information; match the current magnetic signal waveform according to the waveform spacing of each denomination genuine coin; automatically ignore suspected interference peaks ; Automatically compatible with the lack of peaks caused by insufficient signals; scoring all matching templates; making a final comprehensive judgment based on the scores. The invention transforms the magnetic waveform feature of the safety thread into a sequence of wave peaks and the distance between the wave peaks, and matches the calculated sequence with a known template. The invention has a strong anti-counterfeiting function, can be compatible with the interference of miscellaneous peaks of signals, and can be compatible with the situation of missing peaks caused by bad signals.

Description

technical field [0001] The invention relates to the field of anti-counterfeiting technology, in particular to a method, device and equipment for denomination identification using security thread magnetic codes. Background technique [0002] The security thread on banknotes is a traditional technology commonly used in banknote anti-counterfeiting measures. The magnetic code of the security thread is an important feature of the banknote sorting and counterfeit identification during the use of the banknote checking machine, and is an important basis for the banknote checking machine to correctly separate banknotes and identify counterfeit currency. If the new version of the banknote uses different magnetic materials on the magnetic code of the security thread, the manufacturing process needs to be manufactured in two or more times, resulting in an error in the spacing between the two magnetic inks, and the error is different for different banknotes. If the magnetic material us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/004G07D11/50
CPCG07D7/004G07D11/50G07D2207/00
Inventor 朱巍康松冯勇周严
Owner 武汉卓目科技有限公司
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