JPS59167788A - Discriminator for printed matter - 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 The present invention relates to a printed matter discriminating device for discriminating, for example, the type and authenticity of banknotes.

[Technical background of the invention]

2. Description of the Related Art Recently, with the spread of automatic vending machines, currency exchange machines, and bank powering equipment, for example, a discriminating device that discriminates the type, authenticity, etc. of banknotes has become important. Conventionally, such discrimination devices include a detector that optically detects a predetermined portion of a banknote at a predetermined position on a banknote conveyance path, and performs arithmetic processing such as similarity and integration based on the output of this detector. It is known that the type and authenticity of banknotes can be determined by performing the following steps.

[Problems with background technology]

However, the conventional discrimination device described above has the following problems. That is, when a banknote shifts in a direction orthogonal to the transport direction, it is difficult to always detect a predetermined portion, and therefore the rate of inability to distinguish or misclassification becomes extremely high. In addition, if the size of the banknotes differs depending on the type, such as Japanese yen, it is difficult to detect the optimal part of all the banknotes with a detector fixed on the conveyance path. It is. Therefore, it is possible to consider measures such as providing a smaller number of detectors depending on whether the banknotes are pushed or thicker, but in this case, the problem is that the device becomes larger and more expensive.

[Purpose of the invention]

The invention was made in view of the above circumstances, and its purpose is to enable high-accuracy and high-speed discrimination without being affected by the conveyance position shift or size of the printed matter to be discriminated. Another object of the present invention is to provide a printed matter discrimination device that can be made smaller and lower in price.

[Summary of the invention]

The present invention obtains binary information by optically scanning printed matter to be discriminated in a direction orthogonal to the direction of conveyance thereof, and obtains multivalued information by similarly scanning the printed matter to be discriminated in a direction orthogonal to the direction of conveyance. , Obtain transport position information and shape information of the print V to be discriminated from the obtained 2 (if information), and extract only a specific part of the multivalued fW k obtained above using the obtained transport position information and shape information. The extracted information is used to determine the type, authenticity, etc. of the printed material to be determined.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.
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In FIG. 1, P denotes a banknote as a printed matter to be discriminated, 1 a conveyor belt that grips and conveys the banknote P in the direction of arrow a in the figure, 2 a light source that illuminates the banknote P being conveyed from the top side, and 3 a 1 which is provided on the lower surface side of the banknote P facing the light source 2 and scans the paper @P in a direction perpendicular to the conveying direction a.
A dimensional line sensor 4 is a light source that illuminates the lower surface side of the banknote P being conveyed; 5 is a dimensional line sensor that receives reflected light from the bottom surface of the banknote P by the light source 4 and scans the banknote P in a direction perpendicular to the conveyance direction a; It is a one-dimensional line sensor. Reference numeral 6 denotes a dichotomous circuit that converts the output S1 of the line sensor 3 into binary information, which outputs 1 positive i of '1' in the pit where the banknote P is present and 0'' in the bit where the banknote P does not exist. 7 is a shape person detection circuit which detects the length of the banknote P in the direction perpendicular to the transport direction a and the transport position in the direction perpendicular to the transport direction a, respectively, by the output S of the binarization circuit 6. do. 8 is an A/D that converts the output S2 of the line sensor 5 into a multi-value digital signal.
A converter, 9, is a mask circuit that allows only a predetermined portion of the output S4 of the A/D converter 8 to pass through based on the output of the shape detection circuit 7, and 10 is a mask circuit that uses the output S of this mask circuit 9 to calculate similarities, integrals, etc. An arithmetic circuit that determines the type and authenticity of banknotes by performing arithmetic operations, and 1 is a timing generation circuit that supplies timing signals to each of these parts.

FIG. 2 shows the mask circuit 9 in detail. i
In channel 1, S4 is the output signal 1 of A/D converter 8, S
, is the (% symbol) after the mask, SG1 is the long information output from the shape detection circuit 7, SG2 is the conveyance position information output from the shape detection circuit 7, SG is the scan start signal of the line sensor, SG4 is the line sensor The scanning clock pulse 021 is a down counter, 22, 23, 24 are AND circuits, 25 is an FF circuit, 26 is a register, 27 is a counter circuit, 28 is a ROM (read only memory), 2
9 is a data selector.

Next, the operation in the above configuration will be explained. The banknotes P are conveyed by the conveyor belt 1 in the direction of the arrow a, and pass over the line sensors 3 and 5 in sequence. Thus, the binarization circuit 6 converts the output S of the line sensor 3 into binary information. In this case, when the banknote P is not in the field of view of the line sensor 3, all bits are 0°, when it is within the field of view, the bit where the banknote P exists is 1°, and the bit where the banknote P is not present is 0°. ”01. By sending this binary information S to the shape detection circuit 7, the shape detection circuit 7 becomes 11.
By counting the number of bits that are 1, length information SG in the direction perpendicular to the conveying direction a of the banknote P is obtained, and the length w of the banknote P is obtained from the scanning start point of the line sensor 3.
By counting the number of bits up to the bit that is 1'', conveyance position information SG in the direction orthogonal to the conveyance direction a of the banknote P is obtained.When the banknote P reaches the line sensor 5, It is illuminated by a light source 4, and its reflected light is guided to a line sensor 5 and photoelectrically converted.The output signal S2 of this line sensor 5 is sent to an A/D converter 8, where it is converted into a multivalued digital signal S4. The signal S4 is converted and sent to the mask circuit 9. The mask circuit 9 receives the output signal S4 of the converter 8 using the length change 8G and the conveyance position PSG determined by the shape detection circuit 7. By applying an electrical mask to the line sensor 5, only a predetermined portion of the signal is extracted from the signal of the entire field of view of the line sensor 5.Here, the operation of the mask circuit 9 will be explained in detail. The transport position information SO2 is loaded by inputting the start signal SO1, and its contents are counted down by the clock pulse SG4.Then, when a borrow signal is output from the down counter 2, the FF circuit 25 is set by the signal. The set output is supplied to the AND circuit 23 as a conveyance position signal S05 indicating the conveyance position of the banknote P. Furthermore, length information SG is set in the register 26 by inputting the running start signal SG.

Furthermore, when the FF circuit 25 is set, the gate of the AND circuit 22 is closed, and the manual input of the clock pulse SG4 to the down counter 21 is prohibited.
1 stops operation.

Thus, the conveyance position signal 8G is sent to the AND circuit 23.

When the clock pulse SG4 is supplied, the clock pulse SG4 is input to the counter circuit 27, and the counter circuit 27 receives the pulse 8G4.
starts TdJ creation and specifies the address of the ROM28. That is, the ROM 28 stores in advance mask data regarding, for example, the length of the banknote P in the transport direction a and the cross direction (that is, for each type of banknote P).
According to the contents of the register 26, a corresponding mask data area is specified. By sequentially addressing these designated areas by the counter circuit 27, a mask signal 8G indicating the determined position of the banknote P regardless of the transport position is generated.

Output. This output mask signal SG.

is supplied to the AND circuit 24, which opens the gate of the AND circuit 24. While the gate of this AND circuit 24 is open, a clock pulse SG4 is supplied to the data selector 29. As a result, the data selector 29 is operated by the Glocknocellus SG, and the position 1 . It allows only the following signals to pass through. The signal masked in this way, that is, the output S5 of the mask circuit 9, is sent to the calculation circuit Wr 10K. fIeFa4 and whether it is true or false is determined, and the determination result is output.

In this way, binary information is obtained by optically scanning the banknote P in the direction perpendicular to the transport direction a, and multi-value information is obtained by optically scanning the banknote P in the same direction orthogonal to the transport direction a. information is obtained, and the banknote P is determined based on the binary information obtained above.
Obtain conveyance position information and long information in a direction perpendicular to the conveyance direction a, and create a mask signal indicating a fixed position of the banknote P regardless of the conveyance position using each of the obtained information,
By masking the hand price information obtained above using this mask signal, only the information of the determined portion is extracted, and the type and authenticity of the banknote P are determined based on this extracted information. Therefore, without installing a large number of detectors on the conveyance path, and without being affected by the initial size of banknotes and any fluctuations in the conveyance position, the #f spider part of the banknote P is always detected. By detecting it, it is possible to perform high-accuracy, high-speed discrimination, and it is also possible to reduce the size and cost.

In the above embodiment, the shape detection circuit was digitally processed in order to clarify the subtle differences in the length and conveyance position of the banknotes, but if there is no such concern, analog processing may also be used. good. Furthermore, if all the bills are of the same size, length detection may be omitted. Furthermore, although the case has been described in which the present invention is applied to a banknote discriminating apparatus, the present invention is not limited thereto, but can also be applied to a discriminating apparatus for printed matter other than banknotes, such as checks and securities.

〔Effect of the invention〕

As detailed above, the present invention enables high-accuracy and high-speed discrimination without being affected by the conveyance position shift and size of soft-discrimination printed matter, and also enables miniaturization and cost reduction. A printed matter discrimination device can be provided.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, with FIG. 1 being an overall configuration diagram and FIG. 2 being a block diagram showing details of a mask circuit. P...Banknotes (printed matter to be determined), 1...Boat transport belt, 2
．． 4...Light source, 3,5...Line sensor, 6...2
Value converting circuit, 7... Shape detection circuit, 8... A/D converter, 9... Mask circuit, 10... Arithmetic circuit. Representative patent attorney Kensuke Chika (1 idiot) Figure 1 Figure 2 Figure 9 ノ

Claims (4)

[Claims] (1) A first detection means that obtains binary information by optically scanning the transported printed matter to be distinguished in a direction orthogonal to the conveying direction; a second detection means for obtaining multivalued information by optically scanning the image; a detection means for obtaining conveyance position information and shape information of the printed material to be discriminated from the binary information obtained by the first detection means; an extraction means for extracting only a specific part of the multivalued information obtained by the second detection means based on the conveyance position information and shape information obtained by the means; and a type of printed matter to be determined based on the information extracted by the extraction means; What is claimed is: 1. A printed matter discriminating device characterized by comprising: discriminating means for discriminating authenticity, etc. (2) Above 1. 2. The printed matter discrimination device according to claim 1, wherein the second detection means performs optical scanning using a line sensor. (3) The printed matter discrimination device according to claim 1, wherein the shape information is a deflection in a direction orthogonal to the conveyance direction of the printed matter to be discriminated. (4) The extraction means selects corresponding mask data from a memory in which mask data for each shape of the printed matter to be determined is stored in advance based on the transport position information and shape information obtained by the detection means, and 2. The printed matter discriminating device as set forth in claim 1, wherein only the multivalued information of a specific portion is extracted by masking the multivalued information obtained by the second detection means using mask data.