JPH01108696A - Selector with pattern detection circuit for sheet paper - Google Patents

Abstract

PURPOSE: To allow the selection machine to identify authenticity and denomination of paper sheets by storing a reference pattern to a memory circuit and using a detection means to detect a pattern of a measured object. CONSTITUTION: When a paper sheet 21 passes through a pass line 22 while a memory circuit 33 connecting to a CPU 32 interlockingly is cleared, the information as to a pattern of the paper sheet such as characters, codes and graphics is set and stored in the memory circuit 33 as a reference pattern and this pattern is being stored till it is newly cleared afterward. As a result of comparison between the reference pattern and a measured object by the CPU 32, when the identity is discriminated, a control signal is outputted to a selection carrying mechanism, by which the paper sheet is selected and carried up to a stack position. The paper sheets whose identity in the denomination is not discriminated are returned to, e.g. an insert port or carried to other stack position by the selection carrying mechanism.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides a device for identifying and sorting the authenticity and type of paper sheets such as banknotes, cash vouchers, checks, bills, etc., using a simple circuit configuration. The present invention relates to a sorting device equipped with a pattern detection circuit for paper sheets that can identify and select types of paper sheets.

(Prior art) A light emitting device emits light to a paper sheet, which is an object to be measured, which is sequentially conveyed through a path line 2 located between a light emitting element and a light receiving element that receive reflected light, which are arranged facing each other. By emitting a measuring light beam from the element and receiving the transmitted light and reflected light that pass through the object to be measured with the light receiving element, the surface and interior of the paper sheet can be measured based on the amount of transmitted light and reflected light of the paper sheet. 2. Description of the Related Art Optical character reading devices, optical code reading devices, optical pattern identification devices, etc., which identify patterns of formed characters, figures, codes, etc., are conventionally well known. These reading or weaving devices can process quickly and accurately without contacting the object to be measured, so they can check the authenticity and type of banknotes, cash certificates, gift certificates, various tickets, checks, bills, etc. It is widely used in pattern identification devices that identify images based on printed patterns, as well as various other identification devices.

In this type of device, by optically manipulating the object to be measured such as paper sheets, the amount of light transmitted and Changes in the intensity of the amount of reflected light are detected, and this detection signal is extracted as an analog electrical signal proportional to the intensity of the light using a photoelectric converter. For example, this analog electrical signal is converted into a binary signal corresponding to the background area and character code area of the paper sheet, and is expressed as a reading pattern using binary logic, and this is compared with a predetermined reference pattern to determine whether the character code is good or not. The system determines whether the banknotes are genuine or fake.

Set and keep several of these reference patterns in memory means, etc.! ! The paper sheets having the set reference pattern are identified and selected, and then transported to a subsequent processing device or the like.

FIG. 2 shows a conventional circuit configuration for optically detecting a pattern. A paper sheet l as an object to be measured has a light emitting element 2 that emits measurement light and light receiving elements 3a and 3 that receive the measurement light.
b. In the process of conveying the paper sheet l, the light receiving element: 3a.

The pattern of the paper sheet is detected based on the transmission of the attenuated measurement light and reflected light incident on 3b, and changes in the strength of the amount of reflected light.

The light receiving elements r-3a, 3b, etc. output to the amplifier circuit 4 which performs waveform shaping based on changes in the intensity of the amount of transmitted light and the amount of reflected light, and the amplified signal is converted to Δ/I):] by the inverter 5.
/[) and is input to the CPtJ (central processing circuit) 6. In the reference value selection circuit 7, base l values related to patterns of predetermined types of paper sheets are set and held, and from among these values, the reference value of the target paper sheet is selected. . The reference value selection circuit 7 manually inputs a signal to the CPU 6 indicating a reference pattern for the paper sheet to be identified. Then, by comparing the actual pattern of the paper sheet 1 as the object to be measured input via the A/D converter 4 with the reference value, the type and authenticity of the paper sheet are identified.

However, the conventional measuring circuit described above has the disadvantage that the types of paper sheets that can be identified are limited to those that are set and held in the reference value selection circuit 7 in advance. As a practical matter, with the exception of limited types of banknotes, it is impossible to set standard values for all patterns, assuming all of the countless new types of paper sheets with different patterns that will be issued. be. In particular, many types of gift certificates, cash certificates, tickets, checks, etc. are issued in arbitrary patterns, so if the range of selection is narrowly limited,
The scope of application of a device that selects a desired paper sheet from among a large number of paper sheets is extremely limited.

(Object of the Invention) The present invention has been made in view of the above, and makes it possible to identify the authenticity and type of all kinds of objects to be measured based on their unique patterns. It is an object of the present invention to provide a sorting device equipped with a detection circuit.

(Summary of the Invention) In order to achieve the above object, a sorting device equipped with a paper sheet pattern detection circuit according to the present invention has a configuration in which a memory circuit for storing pattern detection results is connected to a CPU,
When the pattern of each paper sheet is detected by the pattern detection circuit in a state where the memory circuit is cleared, the pattern of the paper sheet is held as a reference pattern in the memory circuit. The paper sheets measured after the -th sheet are compared with the reference pattern in the CP Ll to determine their identity.

(Example) Hereinafter, a sorting device equipped with a paper sheet pattern detection circuit of the present invention will be described in detail.

FIG. 1 is a block diagram showing the configuration of a pattern detection circuit for filter paper sheets used in the sorting apparatus of the present invention.

This pattern detection circuit consists of light emitting elements 2 that are arranged opposite to each other across a path line 22 through which paper sheets 21 as objects to be measured are conveyed by a conveyor belt (not shown) or the like.
3 and the first light receiving element 24, the second light receiving element 25 which is arranged on the same side as the light receiving element 23 and receives the measurement light reflected by the paper sheet 21, and the signal from the light receiving element 24.25. An amplifier 30 that amplifies and shapes the signal, an A/D converter 31 that converts the analog signal from the amplifier 30 into a pulse signal, and a CPU 32 that processes the pulse signal.
It has a memory circuit 33 that stores processing signals of the CPU 32 and a rewritable reference pattern. Light emitting element 23
and the light receiving elements 24 and 25 constitute a pattern detection means.

Since this pattern detection circuit is used, for example, in a sorting device that identifies and sorts the authenticity and type of banknotes, cash vouchers, checks, bills, etc., the CPU 32 has a sorting and conveying mechanism that sorts and conveys the identified paper sheets. (not shown).

The measurement light beam irradiated onto the paper sheet 2I passing through the pass line 22 from a light emitting element 23 such as a light emitting device is photoelectrically converted by a light receiving element 24, 25 of a photodiode or photoamplifier tube. Thereafter, the shaping amplifier 30 adjusts it to a predetermined analog voltage (ri) and removes noise etc. The output signal of the amplifier 30 is converted into a pulse signal by the A/D converter 31 to enable digital processing. After the conversion, the CPU 32 performs arithmetic (comparison) processing according to a predetermined program.

A mesh circuit 33 connected to the CPU 32
is cleared, move the pass line 22 to the paper sheet 2.
1 passes, information about patterns such as characters, marks, figures, etc. of the paper sheet is set and held as a reference pattern in the memory circuit 33, and from then on until it is newly cleared, the information about the pattern of the paper sheet is set and held as the reference pattern. Continue to hold the pattern.

As a result of the comparison between the reference pattern and the object to be measured in the CPU 32, if it is determined that they are identical, a control signal is output to a sorting and conveying mechanism (not shown), and the paper sheets are sorted and conveyed to the stacking position. transport. Paper sheets for which the sameness of type has not been determined are returned to the insertion slot, for example, or are transported to another stacking position by a sorting transport mechanism.

When changing the type of paper sheets to be sorted, clear the memory circuit 33, pass a new paper sheet through the pass line and measure it in the same manner as above, and create a new reference pattern. It is set in the memory circuit 33.

Furthermore, in the above embodiments, optical measurement means such as light emitting and light receiving elements were used, but the scope of the present invention is not limited thereto, and the magnetism contained in printing ink may be detected using a magnetic sensor. It is also possible to learn patterns and compare and select them.

(Effects of the Invention) As described above, in the sorting device equipped with the paper sheet pattern detection circuit of the present invention, the pattern detection circuit detects the paper sheets as the object of ff1ll determination in the state where the memory circuit is cleared. By detecting the pattern, the measurement circuit learns the reference measurement value, and from then on, the newly measured object is compared with the reference pattern to identify and judge authenticity, sameness of type, etc. As a result, it is possible to easily and quickly perform sorting work on all types of paper sheets. In particular, unlike conventional examples using reference pattern selection circuits, this method does not have the disadvantage of being able to measure only a limited number of preset types of paper sheets, and has wide versatility.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a paper sheet pattern detection circuit used in the sorting device of the present invention, and FIG. 2 is an explanatory diagram of a conventional circuit configuration for optically detecting length, etc.

Claims (2)

[Claims] (1) Equipped with a pattern detection circuit that detects patterns such as characters, figures, codes, etc. formed on paper sheets as objects to be measured and compares them with a reference pattern, and the paper sheet serves as a reference. In the sorting device that sorts paper sheets when they match a pattern, the pattern detection circuit includes a detection means for measuring the pattern of the paper sheet as an object to be measured, and a rewriting device for storing the detection result as a reference pattern. and a central processing circuit that compares the reference pattern with a pattern detected for another paper sheet to identify and determine the sameness of the type of the other paper sheet; A sorting device equipped with a pattern detection circuit for paper sheets, characterized in that the reference pattern is stored in the memory circuit by detecting the pattern of the object to be measured by the detection means. (2) A sorting device equipped with a paper sheet pattern detection circuit according to claim 1, wherein the detection means is comprised of a light emitting element and a light receiving element.