JPS5952394A - Sheet paper discrimination system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for discriminating paper sheets, such as banknotes, checks, stock certificates, etc., by detecting the physical quantity of the paper sheets and discriminating them into good and unfit sheets. .

[Technical background of the invention]

2. Description of the Related Art Conventionally, one way to distinguish paper products such as banknotes into good and unfit bills is based on whether or not the paper products are entirely soiled.

Hereinafter, the conventional discrimination method will be explained with reference to FIG. is imaged on the light receiving element 4 via the optical system 3 and photoelectrically converted. Further, the light transmitted through the paper products P enters the light receiving element 5 and is photoelectrically converted. The respective outputs of the light receiving element 4.5 are sent to an integrator 8.9 via an amplifier 6.7.
supplied to On the other hand, numeral 10 denotes a sheet passage detector consisting of a light source and a light receiving element, and its output is supplied to a control circuit 11. This control circuit II sends an integration command signal to the integrators 8 and 9 to integrate over the entire length of the paper sheet P in the transport direction. The Tanita side of the integrator 8.9 is supplied to a comparison/discrimination circuit 12.13, where a valid note or an unfit note is discriminated by comparing with a discrimination level.

[Problems in technical background]

However, in the conventional discrimination method described above, the discrimination level between good and unfit notes is fixed, so if the discrimination criteria changes depending on the user, the discrimination level must be adjusted each time. , there was a problem that it was not suitable for practical use.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to easily change the criteria for distinguishing between good and unfit notes by operating a switch, thereby adjusting the unfit note ratio according to the user's needs. The purpose of this invention is to provide a method for distinguishing paper sheets.

[Key points of the invention]

According to the present invention, by selecting one level corresponding to a desired unfit note ratio from among a plurality of levels using a switch and using it as a discrimination level, it is possible to arbitrarily change the criterion for determining whether a normal note or an unfit note is determined. This is how it was done.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an example of a device configuration necessary to carry out the present invention, in which 15 is a detection unit that detects the characteristics of paper sheets, 16 is a setting switch unit that sets the unfit note rate, and %I7 is a divine calculation. 18 is a detection data distribution value storage section, I9 is a setting discrimination value storage section, and 2o is this storage section!
This is a printer that prints out the answers to I9.

FIG. 3 shows the detection section 15 in detail. In other words, light from a light source 21 is irradiated via an optical system 22 onto the surface of a paper sheet P, which is transported in the direction of the arrow by a conveyor belt that does not warp, and the reflected light is The image is formed on a light receiving element 24 via an optical system 23, and is subjected to photoelectric conversion.In addition, the light that has passed through the paper sheet P enters the light receiving element 25 and is photoelectrically converted. Light from a light source 26 is irradiated onto the back surface of the type P via an optical system 27, and the reflected light is imaged on a light receiving element 29 via an optical system 28 and photoelectrically converted. Each output of the light receiving element 24, 25, 29 is connected to an amplifier 3.
0.31.32 is supplied to integrators 33, 34, and 35. On the other hand, 36 is a sheet passage detector consisting of a light source and a light receiving element, and its output is sent to a control circuit 37. Supplied. This control circuit 37 sends an integration command signal to the integrators 33, 34, 35 to integrate over the entire length of the paper sheet P in the transport direction. 38, and the output of this adder 38 is supplied to the arithmetic control section 17 as characteristic data of the paper sheet P.

FIG. 4 shows the setting switch section I6 and the calculation control section I7.
It shows a part of. That is, the setting switch section 1
6 is a rotary inch 4 that can be switched to N stages, for example.
1 and a dial knob 42 that operates this switch 4)
It is composed of Then, each divided voltage (discrimination level) of the voltage dividing circuit 43 is set by the switch 41.
VN is selected and the selected voltage is supplied to the comparison/discrimination circuit 44. The voltage dividing circuit 43 is l'
l +11 direction resistance R, ~ltN+1 is foot voltage iw
It is connected in series between the sources VA and VB, and is provided in the arithmetic control section 17 together with the comparison/discrimination circuit 44. Here, the upper i resistance ■mo, ~kLN-H is each partial voltage 'Wit
k Vl~VN Ka fc Toeha 5-10-15゜2
Each resistance value is determined to correspond to the unfit note rate that changes linearly from 0 to 0.Next, the discrimination method of the present invention will be explained in detail in the above configuration. . First, a predetermined number of sample paper sheets: (nl) are conveyed one by one in lA order and passed through the detection section 15, thereby detecting percentage data for each paper sheet and calculating and controlling section 17. supply to. The arithmetic control unit 17 performs predetermined arithmetic processing (for example, A/Lli conversion, etc.) on the feature data for each image (that is, the output of the adder 38), and then sequentially stores it in the detected data distribution value storage unit 18 as a frequency distribution value. Remember. At this time, the feature data (pi number distribution value) is sequentially stored in the size of the level. When the collection of characteristic data for all sample paper sheets is completed, the arithmetic control unit zykl selects six values of unfit note rate (for example, 5, ], 0, which change linearly, which are set and stored in advance).

15, 20,...) and the valley frequency distribution value in the inspection data distribution value storage unit 18, a plurality of (N) discrimination levels are obtained by performing processing based on the flowchart shown in step 6-. , is stored in the setting discrimination value storage section 19. FIG. 5 shows an example of the frequency distribution. That is, in FIG. 6, first, from the total number n of sample paper sheets passed through, the N level L corresponding to the number of switching stages of the rotary switch 4I is selected from the frequency distribution. Next, the second stage 0
A level L corresponding to 2 is selected from the frequency distribution. This process is repeated - (levels IJN up to the Nth stage are selected from the frequency distribution, and each of these levels is stored in the set discrimination value storage unit I9. In this way, N discrimination levels L1 to LN are selected. When the determination is completed, the arithmetic control unit I7 prints out the contents of the setting discrimination value storage unit I9 (each discrimination level) by operating the printer 20.The operator then visually checks the printed contents to determine which discrimination Distinguish paper sheets based on level 5
Then, the unfit note rate corresponding to the determined discrimination level is set by the low-return switch 4I of the setting switch section 16. Then, the corresponding discrimination level (divided voltage) is selected and supplied to the comparison and discrimination circuit 44. By conveying the sheets to be actually discriminated one by one and passing them through the detection unit I5, the arithmetic control unit I7 supplies the output of the adder 38 to the comparison and discrimination circuit 44, and The system distinguishes between good notes and unfit notes based on the discrimination level obtained.

With this type of discrimination method, one of the multiple levels can be selected by changing the dial (rotary switch).
By selecting one and using it as the discrimination level, you can easily change the discrimination criteria for good and unfit notes by dial operation, and it is possible to reliably distinguish between good and bad notes by adjusting the unfit note rate according to the user's needs. becomes.

In the above-mentioned embodiment, the characteristic data of the front and back sides of the paper sheet were collected as one data, but the data may be collected separately. in this case,
The respective outputs of the integrators 33 and 34 in the detection section 15 are added together, and the respective outputs of the integrators 34 and 36 are added together, and the respective outputs are supplied to the arithmetic control section 17.

In this case, the rotary switch 411 voltage divider circuit 4
3 and one more of the same as comparative discrimination open circuit 44.
By adding a value to the front and back sides of the paper sheet, the fitness determination is performed for each of the front and back sides of the paper sheet.Also, in the embodiment described above, the content of the setting determination value storage unit 19 is printed out by the printer 20, but it can be displayed by, for example, a display device. It may also be output.

Furthermore, in the embodiment described above, after printing out the contents of the set discrimination value storage section I9, a desired unfit note rate is set using the rotary switch 41 based on the printed contents, so that the corresponding discrimination level can be changed to a partial pressure (lower voltage). ) is obtained from path 43, but the invention is not limited to this, and they may be processed by software. That is, when each discrimination level is stored in the installation discrimination value storage unit I9, the calculation control unit 17
notifies the operator of this fact.

Therefore, when the operator sets a desired unfit note rate with the setting switch section 16, the arithmetic control section 17 also selects the corresponding discrimination level in the setting discrimination value storage section I9, and converts it into, for example, 1)/A. This signal is supplied to the comparison/discrimination circuit 44. In addition, the printer 20, the voltage dividing circuit 43, etc. are not required, and more accurate determination processing is possible.

〔Effect of the invention〕

As described in detail above, according to the present invention, a method for discriminating paper sheets is provided in which the criteria for distinguishing between good and unfit notes can be easily changed by the operation of a switch, and thereby the paper sheets can be discriminated based on the unfit note rate according to the needs of the user. Can be provided.

[Brief explanation of the drawing]

Figure 1 is a block diagram for explaining the conventional discrimination method.
FIGS. 2 to 6 are for explaining a simple embodiment of the present invention. FIG. 2 is a block diagram showing an example of a device configuration necessary to carry out the present invention, and FIG. A block diagram showing the detection section, FIG. 4 is a configuration diagram showing a part of the setting switch section and calculation control section in FIG. 2, FIG. 5 is a characteristic diagram without showing an example of frequency distribution, and FIG. 6 is a main part. 3 is a flowchart for explaining processing operations. P... Paper sheet, 15... Detection unit, I6... Setting switch unit, 17... Calculation NflJ control unit, 18... Detection data distribution value storage unit, setting discrimination value storage unit, 41 ...
Rotary switch, 42...Dial knob, 43...
... Voltage dividing circuit, 44... Comparison discrimination circuit. Applicant's agent 9F Buri Nori Chika Kensuke (1 idiot) Mt, WI hltqWI B 535- Ma Ra Ro 29 11111-Level Figure 6

Claims (2)

[Claims] (1) In a system that detects the physical quantity of paper materials being conveyed and compares it with a discrimination level to distinguish between normal and unfit notes, one of the levels corresponds to a desired unfit note rate from among a plurality of levels. A paper sheet discrimination method characterized by selecting one of two levels by a switch and using it as a discrimination level. (2) The paper industry discrimination method 0 according to claim 1, wherein the plurality of levels are set so that the unfit note rate changes linearly.