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Method and system for calculating thickness of paper money

A banknote and height technology, applied in the field of banknote thickness detection, can solve the problems of large calculation result error and high calculation difficulty, and achieve the effect of short calculation time, low algorithm difficulty and accurate calculation result

Active Publication Date: 2016-01-13
SHENZHEN YIHUA COMP +2
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] In the deposit and withdrawal self-service equipment, it is necessary to detect various indicators of banknotes, one of which is the thickness of banknotes. In the prior art, ultrasonic devices are usually used to calculate the thickness of banknotes based on the variation of ultrasonic parameters caused by the thickness of banknotes. This method requires complex conversion between ultrasonic parameters and banknote thickness to obtain the banknote thickness, which is difficult to calculate; while the eddy current thickness sensor calculates the banknote thickness by directly obtaining the resonant frequency of the resonant coil on the sensing chip of the banknote sensor. However, The resonant frequency of the resonant coil cannot truly reflect the thickness of the banknote, and the calculation result has a large error

Method used

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  • Method and system for calculating thickness of paper money

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Embodiment 1

[0044] refer to figure 1 , a method for calculating the thickness of banknotes, comprising:

[0045] S101. Obtain the height position of the sensing sheet of the sensor and the frequency feature value corresponding to the height position, and establish a reference data table according to the correspondence between the height position and the frequency feature value; the height position and the frequency corresponding to the height position The eigenvalues ​​are inversely proportional to each other.

[0046] The oscillating coil is installed on the induction sheet of the sensor. When the induction sheet is in different positions, the resonance frequency of the corresponding oscillation coil is different. The higher the position of the induction sheet, the higher the resonance frequency of the corresponding oscillation coil. The above resonance frequency is obtained The lower the frequency characteristic value, the relationship between the height position of the sensing sheet a...

Embodiment 2

[0060] This embodiment provides another method for calculating the banknote thickness, including:

[0061] S201. Obtain the height position of the sensing sheet of the sensor and the frequency feature value corresponding to the height position, and establish a reference data table according to the correspondence between the height position and the frequency feature value; the height position and the frequency corresponding to the height position The eigenvalues ​​are inversely proportional to each other.

[0062] refer to figure 2 , S201 includes:

[0063] S2011. Acquire the N height positions of the sensing sheet of the sensor and the frequency feature values ​​corresponding to the N height positions, and establish raw data according to the correspondence between the N height positions and the frequency feature values ​​corresponding to the N height positions Table, N is a preset integer.

[0064] The corresponding oscillating coil on the induction sheet of the sensor, wh...

Embodiment 3

[0084] refer to image 3 , the present embodiment provides a system for calculating banknote thickness, including:

[0085] 101. Data table establishment module: used to obtain the height position of the sensing sheet of the sensor and the frequency characteristic value corresponding to the height position, and establish a reference data table according to the correspondence between the height position and the frequency characteristic value; the height position and the frequency characteristic value The frequency eigenvalues ​​corresponding to the height positions are inversely proportional to each other.

[0086] The corresponding oscillating coil on the induction sheet of the sensor, when the induction sheet is in a different position, the resonance frequency of the corresponding oscillation coil is also different, the higher the position of the induction sheet, the higher the resonance frequency of the corresponding oscillation coil, obtained by the above resonance frequency ...

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Abstract

The invention discloses a method and system for calculating the thickness of paper money. The method includes the following steps that: the height position of an induction sheet of a sensor and a frequency characteristic value corresponding to the height position are obtained, and a reference data table is established according to a corresponding relationship between the height position and the frequency characteristic value; a frequency characteristic value when no paper money exists is obtained, so that the height position of the induction sheet in a no-paper money state can be obtained; a frequency characteristic value when paper money passes is obtained, so that the height position of the induction sheet when the paper money passes can be obtained; and the thickness of the paper money can be calculated according to the height position of the induction sheet in the no-paper money state and the height position of the induction sheet when the paper money passes. According to the method and system of the invention, the reference data table is established according to the corresponding relationship between the height position and the frequency characteristic value; the height position of the induction sheet in the no-paper money state and the height position of the induction sheet when the paper money passes can be obtained through searching the table; and therefore, the thickness of the paper money can be calculated. The method and system have the advantages of more accurate calculation result, low algorithm difficulty and short computing time.

Description

technical field [0001] The invention relates to the field of banknote thickness detection, in particular to a method and system for calculating the banknote thickness. Background technique [0002] In the deposit and withdrawal self-service equipment, it is necessary to detect various indicators of banknotes, one of which is the thickness of banknotes. In the prior art, ultrasonic devices are usually used to calculate the thickness of banknotes based on the variation of ultrasonic parameters caused by the thickness of banknotes. This method requires complex conversion between ultrasonic parameters and banknote thickness to obtain the banknote thickness, which is difficult to calculate; while the eddy current thickness sensor calculates the banknote thickness by directly obtaining the resonant frequency of the resonant coil on the sensing chip of the banknote sensor. However, The resonant frequency of the resonant coil cannot truly reflect the thickness of the banknote, and t...

Claims

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Application Information

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IPC IPC(8): G07D7/16
Inventor 莫良雄
Owner SHENZHEN YIHUA COMP
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