JPH10162194A - Discriminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the judgement precision by reducing variance by judging whether or not a paper money is genuine by a featured part of the paper money, etc. SOLUTION: An area 1 for obtaining a reference value of a standard pattern of a genuine paper money, etc., detected by sensors 4 to 8 is set, the reference value is set with the pattern in the area 1, and featured areas (areas 2 to (n)) of the paper money, etc., are set with the standard pattern, and maximum values or minimum values (extreme value) of the respective areas are found, and the differences between the reference value and extreme values are stored as standard values in a memory 13. A reference value of read data is set with the same area as the area 1, extreme values of areas set equally to the standard pattern in advance are found, and the difference between the reference value of the read data and extreme values are calculated. A comparison decision means I14 compares the differences with the standard value of the corresponding standard pattern in the memory and a comparison judging means II16 judges whether or not the total result of the comparison results correspond to the genuiness criterion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an identification device for reading information from a bill or the like by a sensor and judging the authenticity of the bill or the like.

[0002]

2. Description of the Related Art In vending machines and currency exchange machines, it is necessary to determine the authenticity of inserted bills and the like. As a means to obtain information for judging authenticity from bills, etc., a method of reading the distribution of magnetism contained in the ink printed by the magnetic sensor, a method of reading the density of the print and the state of the watermark by the optical sensor, or a combination of both Is a general method. Since the present invention can be applied to any of the methods without limitation, an optical sensor will be described below as an example.

FIG. 1 is a side view showing the structure of a device for identifying bills and the like. Each time a bill or the like 1 is transported by a transport means 2 such as a belt, the data relating to a print pattern such as a bill is read and stored by an optical sensor 3 provided at a predetermined location of the transport means 2 each time the paper or the like is moved by a predetermined transport length. In general, this is compared with a printing pattern (hereinafter, referred to as a standard pattern) such as a genuine bill previously stored in a memory to determine the authenticity of the bill to be identified.

FIG. 2 is a graph for explaining the above method. The upper limit value 21 and the lower limit value 2 are set so that a standard pattern such as a genuine bill has an allowable width set in consideration of individual variations.
2 is set, and the actually read data 23 is plotted. The authenticity of a bill or the like is determined based on the number deviating from the allowable width. (No data is out of the allowable range in FIG. 2.)

[0005]

The printing variation of banknotes and the like varies within the printing lot, but also varies greatly between printing lots. Furthermore, the variation between new and used ones becomes even greater, and the tolerance is increased. Failure to do so will increase the number of mistakes in determining a genuine banknote or the like as a fake, and increasing the allowable range will increase the number of mistakes in determining a counterfeit as a genuine banknote or the like.

In addition, although data is read for each predetermined transport length, there is a drawback that the variation in the reading time direction becomes large due to the expansion and contraction of the bills and the variation in the transport, and the tolerance must be increased. . An object of the present invention is to provide an identification device capable of reducing erroneous determinations and increasing the processing speed by comparing characteristic portions such as bills so as not to be affected by the variation.

[0007]

An area 1 for obtaining a reference value of a standard pattern such as a genuine banknote read and detected by a sensor is set, and a reference value is set from the pattern in the area 1. Multiple areas (area 2
To area n) to determine the maximum value or minimum value (extreme value) of each area, calculate the difference between the reference value and the extreme value, store it as a standard value in a memory, and at least Means for reading a pattern of a banknote or the like to be identified, a means for setting a reference value of read data in the same area as the area 1, and an arithmetic means for finding extremums of a plurality of areas set in advance to be the same as the standard pattern Means for calculating the difference between the reference value of the read data and the extreme value of the read data, means for comparing the difference with the standard value of the corresponding standard pattern in the memory, and counting means for counting the comparison result,
The identification device includes a determination unit for determining whether or not the aggregation result meets the authentication determination standard.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a plan view showing the structure of a device for identifying bills and the like according to the present invention. The bills 1 are inserted into the insertion slot 9
, And are carried in by the belt 2 serving as a conveying means. The four reflective sensors 4, 5, 6, and 8 each correspond to a bill or the like 1
The light (8 is the lower surface of a bill, etc.) is irradiated with light, the light reflected on the surface of the bill 1, etc., is received, and the print pattern information of the bill 1, etc. is read. The transmission type sensor 7 irradiates light to the bills 1 and the like, receives light passing through the bills 1 and reads information such as a print pattern of the bills 1 and a watermark. The banknote or the like 1 determined to be true in the identified authenticity determination is conveyed by the belt 2 and discharged from the discharge port 10. The banknotes 1 determined to be counterfeit are conveyed to the insertion slot 9 side by the belt 2 and returned.

FIG. 4 is a graph of detection data read by one sensor. In the figure, point A is a point in time when a bill or the like reaches the sensor, and point B is a point in time when the bill or the like has passed. The area between AB is a detection pattern based on information such as bills. The average value is obtained by reading and detecting a plurality of genuine bills and the like, and is referred to as a standard pattern.

In the present invention, first, a certain area is set from the standard pattern, and a reference value is set from the pattern in the area. Next, a characteristic pattern portion such as a bill, for example, five areas a, b, c, d, and e in FIG. 4 are set and a maximum value or a minimum value is calculated. (The number of settings may be determined as necessary. If the number of settings is large, the memory capacity to be described later increases and the determination takes time, but the determination accuracy is improved.) Next, the reference value and the maximum Calculate the difference between the values or the minimum value. Whether to use the maximum value or the minimum value may be determined in consideration of each standard data of the inserted state (the four directions of the direction and the top and bottom) of the bill to be identified. The same applies to the setting of the above-mentioned area, and an appropriate area may be set for each standard pattern. These settings are made by experiments or the like after creating the standard pattern. When the setting is completed, the data is stored in the memory of the identification device.

FIG. 5 is a block diagram of a part of the identification device according to the present invention. Reference numerals 4 to 8 are the above-described optical sensors. 11
Is a means for sequentially storing the read detection data of each sensor, and can store 1 to n respectively. Numeral 12 is an operation and storage means, and when data is stored in the read detection data storage means 11, the maximum value or the minimum value of the preset area is sequentially calculated (whether the maximum value or the minimum value is set in advance). This is means for calculating and storing a difference from a reference value set by the read detection data, and can store a to m. In area 1, a reference value is set and stored from within area 1. The memory 13 stores types of banknotes and the like (3 in this embodiment).
Type), insertable directions (four directions), and the number of sensors (five in this embodiment), that is, reference values of each area (a to m) preset in 3 × 4 × 5 = 60 standard patterns. A difference between the maximum value and the minimum value is calculated, and an allowable maximum value and an allowable minimum value (that is, a standard) having an allowable width and a non-standard allowable number are stored. Numeral 14 denotes a comparison judging means I, which compares the corresponding data in the storage means 12 and the memory 13, judges whether the data is within the standard or not, and transfers the result to the judgment result totaling means 15. The judgment result totaling means 15 is a means for totalizing the judgment results of the above-described 60 patterns, and counts the number out of the standard. When the comparison and determination of all data are completed, the memory 1 is stored in the memory 1 by the comparison and determination means II16.
The non-standard allowable number of No. 3 and the corresponding non-standard number of the judgment result totaling means 15 are compared, and the type and authenticity of the bill and the like are determined. Although the description has been given of the non-standard number, it is needless to say that the determination may be performed on the in-standard number.

The area in which the reference value is set is area 1,
Area 1 is the read data No. 10-No. There are 25 sections. If the maximum value of the area 1 is set as the reference value, the calculation and storage unit reads the read data No. in the read detection data storage unit. 10 to N
o. 25, and the maximum value is selected and stored in area 1. Area a is the read data No. 40-No. 5
8 and the area a is set so as to use the difference between the reference value and the minimum value, the calculation and storage means performs the read data No. in the read detection data storage means. 40-No. The minimum value is selected by comparing 58 and the difference from the reference value stored in area 1 is calculated and stored in area a. Next, area b is read data No. 90-No. If the section 110 is set and the area b is set to use the difference between the reference value and the maximum value, the calculation and storage means reads the read data No. in the read detection data storage means. 90 ~
No. The maximum value is selected by comparing 110 and the difference from the reference value stored in area 1 is calculated and stored in area b. Calculate and store up to m sequentially. Since reading and detection are performed using five sensors, the calculation and storage of m × 5 are performed. It is not necessary to set m areas in the read detection data of all sensors, and the number of areas that can prevent erroneous determination may be used.

The memory 13 reads a plurality of genuine bills and the like and calculates an average value to create 60 standard patterns.
Data of each area is created in the same manner as described above, and the upper limit and the lower limit having an allowable width are stored. If the extremum in the area is set so that the extremum in the area is at the center of the area when setting the area, even if the extremum position shifts due to the variation, the variation of 1/2 of the area width is absorbed, and erroneous determination can be prevented. The center or one side may be determined based on standard pattern data such as bills.

The determination method will be described in detail using the data of the sensor 4. The calculation data of the area stored in the calculation and storage means 12 is sequentially compared and determined by the comparison determination means 14 with the data for the sensor 4 in the memory 13. First, the operation data of the area a stored in the operation and storage means 12 is compared with the data IA-4-a-up and down of the memory 13, and the judgment result is sent to the judgment result totaling means 15. If the determination result is out of the standard, 1 is added to IA-4 of the determination result totaling means 15. It is not added if it is within the standard. Then I
-B-4-a- Up and down comparison. Sequentially, IC-4-
a-up and down, ID-4-a-up and down, II-B-4-a-up and down ... III-C-4-a-up and down, III-D-4-a-up and down The determination of a ends. Similarly, the data of the area b and the data of the area c are sequentially compared and determined.

The comparing and judging means II16 judges by associating the 60 summation result of the judging result summing means with the 60 non-standard allowable number set in the memory 13, and judges the type and authenticity of the bill or the like. If the setting of the reference value, the setting of the area, and the like are appropriately set, the allowable number of nonstandards can be reduced.

[0016]

As described above, the authenticity of a bill or the like is determined based on a characteristic portion of the bill or the like, so that the accuracy of the determination is improved. Further, since the difference from the reference value is used, there is little variation and the determination accuracy is improved.
In addition, since a difference from the reference value is used, a characteristic portion where the pattern does not change much can be set as an area.

Since the extreme value in the area is used, variation in the time direction (in other words, variation in the transport direction of a bill or the like) can be tolerated in the area, and the determination accuracy is improved.

Since only the area data needs to be stored, the storage capacity of the memory 13 can be reduced. For example, the conventional number of reading points can be reduced to 400 in 30 areas.

The calculation and the calculation in the storage means can be performed sequentially in parallel with the reading, and the number of comparison and judgment processes is small, so that the identification can be performed quickly.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of an identification device for bills and the like.

FIG. 2 is a graph for explaining a conventional technique.

FIG. 3 is a plan view of a bill discriminating apparatus according to the present invention.

FIG. 4 is a graph of read detection data.

FIG. 5 is a block diagram of an identification device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Banknote etc. 2 Transport means 3 Optical sensor 4 Reflection type sensor 5 Reflection type sensor 6 Reflection type sensor 7 Transmission type sensor 8 Reflection type sensor 9 Insertion opening 10 Discharge opening 11 Reading detection data storage means 12 Calculation and storage means 13 Memory 14 Comparison Judgment means I 15 judgment result totaling means 16 comparison judgment means II 21 upper limit value 22 lower limit value 23 read data

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yukihiro Yui 4107 Miyoshida, Miyoshida-cho, Kitasaku-gun, Nagano Pref.

Claims (1)

[Claims] 1. An area 1 for obtaining a reference value of a standard pattern such as a genuine bill read and detected by a sensor is set.
The reference value is set from the patterns in the above, a plurality of characteristic areas such as bills (area 2 to area n) are set in the standard pattern, and the maximum value or minimum value (extreme value) of each area is set.
Is calculated, the difference between the reference value and the extreme value is calculated and stored as a standard value in a memory, and at least means for reading a pattern of a bill or the like to be identified by a sensor, and reading data in the same area as the area 1 Means for setting an extremum of a plurality of areas set in advance in the same manner as the standard pattern, means for computing the difference between the reference value of the read data and the extremum of the read data, It has means for comparing the difference with the standard value of the corresponding standard pattern in the memory, totaling means for totalizing the comparison result, and determining means for determining whether or not the totaled result corresponds to the authentication criterion. Identification device.