JPH0831157B2 - Paper leaf discriminating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to a sheet discriminating device used for discriminating banknote types and authenticity in, for example, an automatic teller machine. .

(Prior Art) Conventionally, as a sheet discriminating device, there is known a discriminating device which discriminates its type or authenticity from various patterns obtained from bills. The third example of such a discrimination device
This will be described with reference to the drawings. In FIG. 3, 1 is a banknote nipped and conveyed by a conveyance path (not shown), 2 is a light source (not shown), and the optical pattern of the banknote 1 including the conveyance path is continuously scanned to convey the banknote 1. A line sensor 3 for measuring the distance a between the end of the transport path and the end of the banknote 1 in the direction perpendicular to the direction (hereinafter referred to as the y direction) (hereinafter referred to as the x direction), 3 is the banknote 1. It is a point detection type pattern sensor that detects various patterns possessed by, for example, a magnetic sensor or a color sensor.

In such a conventional device, since the length of the banknote 1 in the x direction varies depending on its type, it is difficult to set the distance a between the end of the transport path and the end of the banknote 1 to a constant value. Met. Therefore, the pattern detected by the pattern sensor 3 varies depending on the value of the distance a, and therefore four times the types of banknotes to be compared (front, back, positive,
The reference pattern of (inverse) is stored in advance, and when the bill 1 is actually conveyed, the distance a is measured, and the reference pattern corresponding to the value is selected from the stored reference patterns. , The banknote is discriminated by comparing with the pattern obtained by the pattern sensor 3.

However, such a conventional discriminating device has a problem that erroneous discrimination occurs when, for example, the end surface of the bill 1 on the a side is shaved in the x direction, bent, or added with a separate sheet. It was

(Problems to be Solved by the Invention) The present invention has been made to solve the problem that misidentification occurs when a sheet is deformed as described above. An object of the present invention is to provide a paper sheet discriminating apparatus capable of discriminating a stable type or authenticity even if added paper sheets are not erroneously discriminated.

[Structure of the Invention] (Means for Solving Problems) A paper sheet discriminating apparatus of the present invention is provided along an oscillator for generating a clock signal and a paper sheet conveyance path, and A line sensor that continuously scans the optical pattern of the paper sheet that includes the line sensor, and counts the clock signal while the line sensor scans one end of the transport path and one end of the paper sheet. A second counter for counting the clock signal while the line sensor scans the other end of the transport path and the other end of the paper sheet; A pattern sensor for detecting a pattern obtained from the paper sheet based on the conveyance of the paper sheet, and a reference to be obtained from the pattern sensor corresponding to the position of the paper sheet passing through the conveyance path. Memorizing hands that memorize patterns If, based on the displacement data of the paper sheet obtained from the count value of said first counter,
A plurality of reference patterns are selected from the storage means, and the first determination means for determining the paper sheet by comparing with the pattern data obtained from the pattern sensor; and the one obtained from the count value of the second counter Second discriminating means for discriminating the paper sheet by selecting a plurality of reference patterns from the storage means based on displacement data of the paper sheet and comparing with pattern data obtained from the pattern sensor; It is provided with collating means for collating the discrimination result of the first discriminating means with the discrimination result of the second discriminating means.

(Operation) The distance between one end of the transport path and one end of the paper sheet is detected by the line sensor and the first counter, and the other end of the transport path and the paper sheet are detected. The distance from the other end of the one of the two is detected by the line sensor and the second counter, and a reference pattern to be compared for each detected value is stored in the storage means in advance, and the one detected value is detected. Is selected from the storage means, the paper sheet is discriminated by comparing it with the pattern obtained from the pattern sensor, and the reference pattern corresponding to the other detection value is selected from the storage means to obtain the pattern. The paper sheet is discriminated by comparing it with the pattern obtained from the sensor, and the discrimination results are compared to make a comprehensive discrimination.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same parts as those in FIG. In FIG. 1, 4 is an amplifier, which is a line sensor 2
Amplifies the output of. Reference numeral 5 is a comparator, which binarizes the output signal of the amplifier 4 at the reference level Vref. Reference numeral 6 denotes a gate signal generation circuit, which is set to a high level until the line sensor 2 scans from one end of the transport path to one end of the bill 1 by the output signal of the comparator 5, that is, for a distance a. And a gate signal G2 that is at a high level until the other end of the bill 1 is scanned from the other end of the transport path, that is, the distance b. An oscillator 7 supplies a clock signal to the line sensor 2 and counters 8 and 9 described later. A first counter 8 measures the distance a by counting the clock signal from the oscillator 7 based on the gate signal G1 generated from the gate signal generation circuit 6. A second counter 9 measures the distance b by counting the clock signal from the oscillator 7 based on the gate signal G2 generated from the gate signal generation circuit 6. An amplifier 10 amplifies the output signal of the pattern sensor 3. 11
Is an A / D converter that converts the analog output signal of the amplifier 10 into a digital signal. 12 is a CPU (central processing unit), the first
The respective output signals of the counter 8, the second counter 9 and the A / D converter 11 are input to perform processing such as the type or authenticity of the bill 1. Reference numeral 13 is a memory (storage means) in which reference patterns to be compared are stored.

Next, the operation in such a configuration will be described. The line sensor 2 operates by receiving a clock signal from the oscillator 7, and its output signal is amplified by the amplifier 4 and sent to the comparator 5. The comparator 5 binarizes the output signal of the amplifier 4 and sends it to the gate signal generating circuit 6. The gate signal generation circuit 6 is
The gate signals G1 and G2 are generated by the above-described operation, and the gate signal G1 is transmitted to the first counter 8 and the gate signal G2.
Is sent to the second counter 9. The first counter 8 measures the distance a by counting the clock signal during the gate signal G1, and the second counter 9 measures the distance b by counting the clock signal during the gate signal G2. Each of the contents of the first and second counters 8 and 9 is the CPU 1
Sent to 2.

On the other hand, the output signal of the pattern sensor 3 is amplified by the amplifier 10, converted into a digital signal by the A / D converter 11, and sent to the CPU 12. The CPU 12 performs processing according to the flowchart shown in FIG. That is, the CPU 12 reads the distance a held in the first counter 8 (S1) and selects a plurality of reference patterns corresponding to the value of the distance a from the memory 13 (S2). Here, the plurality of reference patterns means, for example, a standard pattern that should be obtained from the pattern sensor 3 when the banknote 1 is conveyed such that one end of the banknote 1 is at the position of the distance a. 4 times (front, back, forward, reverse in the transport direction). Next, the pattern obtained from the pattern sensor 3 and the memory 13
Sequentially compare multiple reference patterns selected from
3) If the matching reference pattern is found, the type of the bill 1 at the distance a is determined (S4). Subsequently, the same process is performed for the distance b at the other end of the bill 1 to determine the type of bill 1 at the distance b (S5 to S8). Finally,
The type determination result based on the value of the distance a and the type determination result based on the value of the distance b are collated. If they match each other, an acceptance process is performed, and if they do not match, a reject process is performed (S9).

In this way, even if the size of one side of the banknote is modified such that the size of the banknote is different from the general size, since the discrimination process is performed based on the position information from the other side, accurate type discrimination is possible. It will be possible.

In addition, in the above-mentioned embodiment, the paper money is described as an example of the paper money, but the paper money in the present invention is not limited to the paper money, and is applicable to, for example, securities and other paper money. Needless to say.

[Effects of the Invention] As described above, according to the present invention, it is possible to stably determine the type or authenticity of a sheet without causing misjudgment even if the sheet is deformed. It is possible to provide a classifying device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flow chart for explaining the operation of the same embodiment, and FIG. 3 is a diagram for explaining a conventional apparatus and an embodiment of the present invention. 1 ... Banknotes (paper sheets), 2 ... Line sensor, 3 ... Pattern sensor, 4,10 ... Amplifier, 5 ... Comparator, 6 ...
Gate signal generation circuit, 7 ... Oscillator, 8 ... First counter, 9 ... Second counter, 11 ... A / D converter, 12 ...
... CPU (central processing unit), 13 ... memory (storage means).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuhiro Sakamoto 70, Yanagicho, Sachi-ku, Kawasaki-shi, Kanagawa Toshiba Automatic Equipment Engineering Co., Ltd. (56) Reference JP-A-59-68088 (JP, A)

Claims (4)

[Claims] 1. An oscillator for generating a clock signal, a line sensor provided along a paper path for conveying paper sheets, and a line sensor for continuously scanning an optical pattern of the paper sheets including the paper path, and the line sensor. A first counter that counts the clock signal while scanning one end of the conveyance path and one end of the paper sheet; and the line sensor that detects the other end of the conveyance path and the line sensor. A second counter that counts the clock signal while scanning the other end of the paper sheet, and a pattern provided from the paper sheet based on the transportation of the paper sheet, which is provided in the transport path. A pattern sensor for detecting, a storage unit for storing a reference pattern to be obtained from the pattern sensor according to the position of the paper sheet passing through the conveyance path, and the paper obtained from the count value of the first counter. Strange leaf Based on the data, a plurality of reference patterns are selected from the storage means, the first discrimination means for discriminating the paper sheet by comparing with the pattern data obtained from the pattern sensor, and the total of the second counter. A second determination for selecting a plurality of reference patterns from the storage means based on the displacement data of the paper sheet obtained from a numerical value, and comparing the pattern data obtained from the pattern sensor to determine the paper sheet. A paper sheet discriminating apparatus comprising: a discriminating means for collating the discriminating result of the first discriminating means with the discriminating result of the second discriminating means. 2. The pattern sensor according to claim 1, wherein the pattern sensor is a point detection type color sensor.
An apparatus for discriminating paper sheets according to the item. 3. The paper sheet discriminating apparatus according to claim 1, wherein the pattern sensor is a point detection type magnetic sensor. 4. The paper sheet discriminating apparatus according to claim 1, wherein the paper sheets are banknotes.