JPH09102057A - Bill validator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten data processing time without the increase of cost and space while high precision of the identification of paper money authentication is maintained. SOLUTION: When paper money is supplied to a bill validator, entrance sensors 6 and 7 detect it a transportation motor 10, a transportation belt 9 and a transportation roller 8 are driven, and supplied paper money transported to the directions of identification sensors 1 to 5. When paper money passes through the identification sensors 1 to 5, the authenticity of paper memory is identified based on identification data corresponding to the patterns of paper money outputted from the identification sensors 1 to 5. At that time, the acquisition density of identification data is changed in accordance with the position of a paper money surface. When the feature part of the pattern exists at the upper/lower parts of paper money in a prescribed position in the length direction of paper money, for example, the data acquisition interval of the identification sensors 1 and 5 is made short, and the data acquisition interval of the identification sensors 2 to 4 in the center is made long in a part where the pattern does not change such as a watermark.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bill discriminating apparatus for discriminating the authenticity of inserted bills in an automatic vending machine or the like.

[0002]

2. Description of the Related Art In recent years, there have been a lot of theft cases in which fraudulent counterfeit bills are used to fool merchandise and change in an automatic vending machine. Under such circumstances, improvement in the identification accuracy of the bill identifying device has been further desired.

FIG. 1 is a diagram showing a schematic configuration of a bill validator. In FIG. 1, 1 to 5 are identification sensors, 6, 7
Is an entrance sensor, 8 is a carrying roller, 9 is a carrying belt, 10
Is a conveyance motor, and 11 is a roller pulse generator. When a bill is inserted into the bill validator, the entrance sensors 6 and 7 detect it and drive the transport motor 10, the transport belt 9 and the transport roller 8 to direct the deposited bill in the direction of the identification sensors 1 to 5. Transport to. When the bill passes over the identification sensors 1 to 5, the identification sensors 1 to 1 each include a light emitting element and a light receiving element that are provided so as to face each other across the bill.
A detection signal corresponding to the pattern of the bill is output from 5, and the authenticity of the bill is identified based on these detection signals.

In such a bill identifying device, in order to improve the identification accuracy of the bill identifying device, the number of identification sensors is increased or the time interval for inputting a detection signal from the identification sensor is shortened to obtain the identification data. You should increase the data density.

As a conventional document relating to such a bill validator, for example, Japanese Utility Model Laid-Open No. 1-172169 (G
07D 7/00).

[0006]

However, in the above-mentioned conventional technique, if the number of identification sensors is increased or the time interval for inputting a detection signal from the identification sensor is shortened in order to improve the identification accuracy. However, there has been a problem that the amount of data to be processed for identification increases and the time required for data processing becomes long. Also, if the number of identification sensors is increased, CP that performs data processing
There is also a problem that it is necessary to improve the capacity of the U (Central Processing Unit) and its peripheral hardware, which leads to higher cost and increased space.

An object of the present invention is to solve such a problem and to shorten the data processing time without increasing the cost and the space while maintaining a high bill authenticity accuracy.

[0008]

In order to solve the above problems, in the bill validator of the present invention, the sampling density of the identifying data is changed according to the position of the bill surface.
In addition, an operation to be executed is selected from a plurality of operations according to the position of the bill surface.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a block diagram showing an outline of the control system of the bill validator. Reference numbers 1 to 1
1 corresponds to that of FIG. 1, 12 is a storage device, and 13 is C
PU.

The identification sensors 1 to 5 each include two light emitting elements and one light receiving element. The wavelengths of light emitted by the two light emitting elements are, for example, one red light and the other infrared light. Different from each other like light, they are made to emit light alternately. The bill is irradiated with the light, the light transmitted through the bill is detected by the light receiving element, and it is input to the CPU 13 for arithmetic processing, and the difference or ratio between the red light and the infrared light, or the transmission of the infrared light. The authenticity of the bill is identified by calculating the amount and the rate of change thereof, and comparing the result with the reference data stored in the storage device 12.

The CPU 13 also controls the carry motor 10 for carrying bills in the bill validator. Further, the conveyance amount of the bill is measured by counting the pulses output from the roller pulse generator 11 according to the rotation of the conveyance motor 10.

[0012] By the way, a bill has a part in which a number is described, a part in which a human figure is described, a part in which a complicated pattern is described, or nothing is described in a watermark part. The complexity of the pattern is not uniform as it is not, and it greatly varies depending on the surface position.
In order to identify patterns that are not uniform in complexity,
It is wasteful and inefficient to collect identification data at a uniform density and perform uniform arithmetic processing. For example, it is necessary to collect identification data at a high density in the part of the person image and check it in detail, but at the watermark part, there is almost no change in the data even if the data is collected at a high density, and the data is To be wasted.

(First Embodiment) Therefore, in this embodiment, for example, as shown in FIG. 4, the position of the roller pulse generator 11 (FIG. 1) at the position in the lengthwise direction where the pattern of the bill greatly changes. The number was specified, and the sampling density of the identification data was changed at that position. Moreover, the identification sensor 1
˜5 were divided into two groups, an outer group and a central group, and the sampling densities of the identification data output from them were changed separately.

FIG. 3 is a flow chart showing the procedure for processing the signal acquisition from the identification sensor. This process is performed by the CPU
It is executed in 13 and is started when a bill is detected by the entrance sensors 6 and 7.

Step 1 ... The bills inserted into the bill validator are transported by the transport rollers 8 and the discrimination sensors 1 to 5
It is determined whether or not all of the identification sensors 1 to 5 have been blocked and reached the position of. Step 2 ... When all of the identification sensors 1 to 5 are blocked, the output signals of the identification sensors 1 and 5 at both ends are input every time one pulse is output from the roller pulse generator 11, and the identification sensors in the middle portion are input. The output signals 2 to 4 are input every time four pulses are output from the roller pulse generator 11.

Step 3 ... It is determined whether or not the count value of the pulse output from the roller pulse generator 11 reaches 50. Steps 4 ... When 50, the identification sensors 1 and 5 at both ends
Output from the roller pulse generator 11 with 4 pulses.
The output signals of the intermediate identification sensors 2 to 4 are input each time one pulse is output from the roller pulse generator 11.

Step 5: It is determined whether or not the count value of the pulse output from the roller pulse generator 11 has reached 100. Step 6 ... When the process reaches 100, the identification sensors 1 at both ends are
The output signal of No. 5 is input each time four pulses are output from the roller pulse generator 11, and the output signals of the intermediate identification sensors 2 to 4 are input each time two pulses are output from the roller pulse generator 11. To enter.

Step 7 ... It is determined whether or not the count value of the pulse output from the roller pulse generator 11 has reached 120. Steps 8 ... When 120 is reached, the identification sensors 1 at both ends are
The output signal 5 is input every time four pulses are output from the roller pulse generator 11, and the output signals of the intermediate identification sensors 2 to 4 are input every eight pulses output from the roller pulse generator 11. To enter.

Step 9 ... It is determined whether or not the count value of the pulse output from the roller pulse generator 11 has reached 180. When it is Steps 10 to 180, the output signals of the identification sensors 1 and 5 at both ends are input every time four pulses are output from the roller pulse generator 11, and the intermediate identification sensors 2 to 5 are input.
The output signal 4 is input every time two pulses are output from the roller pulse generator 11.

Step 11 ... It is determined whether or not the count value of the pulse output from the roller pulse generator 11 has reached 190. When step 12 ... 190 is reached, the output signals of the identification sensors 1 and 5 at both ends are input every time four pulses are output from the roller pulse generator 11, and the intermediate identification sensors 2 to 5 are input.
The output signal of 4 is input every time one pulse is output from the roller pulse generator 11.

Step 13 ... It is determined whether or not the count value of the pulse output from the roller pulse generator 11 has reached 250. When step 14 ... 250 is reached, the output signals of the identification sensors 1 and 5 at both ends are input every time one pulse is output from the roller pulse generator 11, and the intermediate identification sensors 2 to 5 are input.
The output signal of 4 is input every time one pulse is output from the roller pulse generator 11.

Step 15: It is determined whether or not the count value of the pulse output from the roller pulse generator 11 has reached 270. When step 16 ... 270 is reached, the output signals of the identification sensors 1 and 5 at both ends are input once each time one pulse is output from the roller pulse generator 11, and the output signals of the intermediate identification sensors 2 to 4 are input. Is input every time four pulses are output from the roller pulse generator 11.

Step 17 ... Still the bill is the identification sensor 1
It is determined whether or not the banknotes 5 to 5 are blocked, and when the bills have finished passing and the identification sensors 1 to 5 are no longer blocked, the processing ends.

In this way, in the complicated characteristic portion of the pattern, the identification data can be collected at a high density, and the identification accuracy can be improved. Data can be collected at a low density to reduce the amount of data to be processed, and the processing speed can be improved accordingly. As a result, high identification accuracy and high-speed processing can both be achieved.

(Second Embodiment) In the above-mentioned embodiment, the sampling density of the identification data is changed depending on the complicated portion and the monotonous portion of the pattern. In this embodiment, the sampling density of the identification data is changed. However, the calculation content for processing the collected identification data is changed according to the place of the data in the bill.

CPU 13 when processing identification data
As described above, the calculation contents of (FIG. 2) include calculation of the difference and ratio between red light and infrared light, the amount of infrared light transmitted and the rate of change thereof, but the change is small. As for the data of the pattern portion, only a part thereof, for example, the amount of infrared light transmitted is calculated and compared with the reference data. Then, with respect to the data of the characteristic portion where the pattern is complicated and changes a lot, all the above operations are performed and the result is compared with the reference data.

The calculation contents during each calculation may be changed depending on the complicated portion and the monotonous portion of the pattern.

In this way, various calculations are performed on the data of the characteristic portion having a complicated pattern, and the results are used for identification, so that highly accurate identification can be performed. Also,
With respect to the data of the pattern portion, which does not change much, only a part of the calculation is performed, so that the calculation processing load can be reduced, and as a result, the processing time can be shortened.

In the above embodiment, the case where there is only one type of banknote has been described, but in the case where a plurality of types of banknotes are identified, when the banknote is inserted into the banknote identification device, first, It is also possible to determine the type and change the position at which the sampling density of the identification data is changed according to the type of bill. Further, in the above-described embodiment, the identification sensor is divided into two groups, an outer group and an inner group, and the sampling density of the identification data is changed for each group, but it may be changed for each identification sensor.

[0030]

As described above, according to the bill discriminating apparatus of the present invention, the content of calculation for changing the sampling density of the discriminating data or processing the discriminating data is performed according to the position of the bill surface. Since it is changed or the operation to be executed is selected from among a plurality of operations, it is possible to shorten the data processing time without increasing the cost and the space while maintaining the high bill authenticity identification accuracy. it can.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a bill validator.

FIG. 2 is a block diagram showing an outline of a control system of a bill validator.

FIG. 3 is a flowchart showing a processing procedure for acquiring a signal from an identification sensor.

FIG. 4 is a diagram showing a relationship between a banknote design and a roller pulse count number.

[Explanation of symbols]

 1-5 Identification sensor 6, 7 Entrance sensor 8 Conveying roller 9 Conveying belt 10 Conveying motor 11 Roller pulse generator 12 Storage device 13 CPU

Claims (2)

[Claims] 1. A bill identifying device, wherein the sampling density of identification data is changed according to the position of the bill surface. 2. A bill identifying device, wherein an operation to be executed is selected from a plurality of operations according to the position of the surface of the bill.