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Method and device for detecting banknotes

A banknote, technology to be detected, applied in the inspection of the authenticity of banknotes, processing coins or valuable banknotes, instruments, etc.

Active Publication Date: 2018-04-06
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a method and device for detecting banknotes, aiming to solve the problem of how to quickly and effectively judge the position and integrity of the security thread from the thickness

Method used

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  • Method and device for detecting banknotes
  • Method and device for detecting banknotes
  • Method and device for detecting banknotes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] refer to figure 1 , figure 1 It is a schematic flowchart of a method for detecting banknotes provided by an embodiment of the present invention.

[0052] In Embodiment 1, the method for detecting banknotes includes:

[0053] Step 101, obtaining effective thickness data corresponding to the security line area in the banknote to be detected, and calculating the mean value of the effective thickness data;

[0054] Specifically, refer to figure 2 , figure 2 It is a schematic diagram of a method for extracting banknote thickness data provided by an embodiment of the present invention. Extract the detection data of a single channel when the thickness sensor passes banknotes one by one (such as figure 2 Take the 6th sensor data as an example).

[0055] All data acquired by the thickness sensor after a single banknote has passed such as image 3 shown in image 3 Among them, the three coordinates are the thickness, the sensor number and the position of the banknote, ...

Embodiment 2

[0072] refer to Figure 7 , Figure 7 It is a schematic flowchart of a method for detecting banknotes provided by an embodiment of the present invention.

[0073] On the basis of Embodiment 1, the method for detecting banknotes includes:

[0074] Before the acquisition of the effective thickness data corresponding to the security line area in the banknote to be detected, and calculating the mean value of the effective thickness data, it also includes:

[0075] Step 104, acquiring thickness data of all regions of the banknote to be detected by a thickness sensor;

[0076] Step 105, removing background noise in the thickness data, and obtaining effective thickness data of all areas in the banknote to be detected;

[0077] Step 106, according to the effective thickness data of all regions in the banknote to be detected, intercept the effective thickness data corresponding to the security line area in the banknote to be detected.

[0078] Specifically, test figure 2 , figu...

Embodiment 3

[0083] refer to Figure 8 , Figure 8 It is a schematic flowchart of a method for detecting banknotes provided by an embodiment of the present invention.

[0084] On the basis of Embodiment 1, after the root determines whether the banknote to be detected is abnormal according to the number of the connected areas and preset rules, it further includes:

[0085] Step 107, if it is determined that the banknote to be detected is abnormal, then further detect the thickness of the security thread on the banknote to be detected;

[0086] Step 108, comparing the detected thickness with a preset thickness threshold to determine the abnormality information of the banknote to be detected.

[0087] Specifically, the detection of the abnormal thickness of the security thread is as follows: According to the thickness data of the security thread, there is a threshold, for example Figure 6 In , the data of the security thread will not exceed 80, and if the tape is pasted on the security th...

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Abstract

The embodiment of the present invention discloses a method and device of banknote detection. The method provided by the invention comprises: acquiring effective thickness data with respect to a safety road area in a banknote to be detected, and calculating the mean of the effective thickness data; comparing the sum of the effective thickness data with the mean, and obtaining the number of connected regions not less than or not larger than the mean; and determining whether the banknote to be detected is abnormal or not according to the number of the connected regions and a preset rule, and performing quick and effective positioning of the location and the integrality of a safety road, the detection of abnormal thickness being not influenced by the abnormal thickness on the safety road such as an adhesive tape pasted on the safety road.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of banknote processing, in particular to a method and device for detecting banknotes. Background technique [0002] The thickness data of the security thread on the banknote will affect the judgment of the abnormal data of the banknote, so it is necessary to judge its position and integrity, and at the same time, it must not affect the judgment of the abnormal thickness of the security thread. Most of the existing methods use image data to locate the security line on banknotes, but because the resolution of the thickness sensor is much smaller than the image, it may cause inaccurate positioning from image mapping to thickness data, and at the same time, it cannot be accurately located from the image. Judging whether the safety thread is complete in thickness, and the simple positioning of the safety thread cannot solve the detection of abnormal thickness of the safety thread. Cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/164
Inventor 越荣中
Owner SHENZHEN YIHUA COMP
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