KR100373779B1 - bill of thickness for detector for ATM - Google Patents

Abstract

The present invention relates to a bill thickness detecting device of an automatic teller machine capable of detecting bill thickness at low cost by using an integrally penetrating sensor, and induces a displacement amount by an axial structure in order to detect a bill thickness of a certain thickness. An apparatus for detecting a banknote thickness of an automatic teller machine for measuring a pressure, comprising: a bearing moving up and down according to a banknote thickness, a first lever pivoting about a first fixed point according to an up and down deformation of the bearing, and A second lever that rotates about a second fixed point according to the rotation of the first lever, a detection unit of the second lever that detects a displacement difference due to left and right movement of the second lever, and the detected displacement difference A first sensor having a voltage change and having a shielding plate at the light receiving portion side and the light emitting portion side, a spring for restoring the first lever in place when the banknote is not conveyed, and the banknote It characterized by configured to get to the steering with a second sensor for detecting if the bearing is an upper and a lower movement.

Description

Bill of thickness for detector for ATM

The present invention relates to a bill thickness detecting device of an automated teller machine (ATM), and more particularly, to a bill thickness detecting device of an automatic teller machine capable of detecting a bill thickness at a low price using an integrated permeable sensor. It is about.

In general, the automatic banknote dispenser automatically handles the withdrawal, inquiry, and bank transfer processing of cash and checks such as those performed by cashiers at counters during off-hours or holidays when customers of financial institutions cannot go through the counters of the branches. It is a financial device.

The above ATM machines are used to host banks in other locations, department stores, express bus terminals, building premises, etc. in order to streamline business operations such as non-operational hours and holiday operations of financial institutions and improve customer service. Connected to a computer (Host Computer) and online (On-line), when a customer directly inserts a corresponding bankbook, cash card or credit card into the card and bank entry slot, the withdrawal is made through the banknote withdrawal unit.

In order to prevent two or more bills from being discharged at the time of withdrawing cash from the ATM, the ATM is usually provided with a device for detecting the thickness of the banknote.

Hereinafter, with reference to the accompanying drawings will be described with respect to the bill thickness detection device of the conventional ATM.

1 is a schematic perspective view showing a bill thickness detection device of a conventional ATM.

As shown in FIG. 1, the first banknote conveying roller 10 is press-fitted on the shaft 12 of the main body frame (not shown) and the first banknote conveying roller 10 is installed externally. The second banknote conveying roller 14 and the second banknote conveying roller 14 of the structure wrapped around the rubber, which is deformed left and right around the first fixing point A, and the second banknote conveying roller 14 2 the lever 16 pivoting around the fixed point B, the Hall element 20 for changing the displacement difference due to the left and right movements of the sensing unit 18 of the lever 16 to a current, and the bill It is composed of a restoring spring 24 for always holding the lever 16 in close contact with the second banknote conveying roller 14 when is not transferred.

Referring to the operation of the banknote thickness tester of the automatic teller machine configured as described above are as follows.

When the bill 22 is transferred between the first and second bill conveying rollers 10 and 14, the outer rubber diameter of the second bill conveying roller 14 is shrunk by the thickness of the bill 22. Accordingly, the lever 16 also moves in proportion to the thickness of the banknote 22. That is, the lever 16 is positioned with the expansion of the restoring spring 24 with the second fixing point B as the axis, and at the same time, the sensing unit 18 moves inside the hall element 20. At this time, the Hall element 20 detects the movement of the sensing unit 18 to detect the movement of the plurality of bills 22.

For example, when the voltage drop of the hall element 20 due to the displacement of the sensing unit 18 is set as a reference value when one banknote 22 is transferred, the second banknote transfer roller when two or more banknotes are transferred. Since the deformation of 14 becomes larger, the sensing unit 18 in the Hall element 20 is moved larger. Therefore, the voltage drop of the Hall element 20 is detected differently from the reference value detected when one bill 22 is transferred, and detects the multi-feed of the bill.

However, when detecting the banknote thickness using the method of measuring the displacement amount as described above, there is a limit in the amplification displacement amount, the accuracy is lowered.

In addition, it is difficult to guarantee the difference between the initial voltage value and the voltage change depending on the sensor. Therefore, it is necessary to calibrate and adjust the initial voltage value during production, and to adjust the maintenance and repair of minute changes in the equipment.

The present invention has been made to solve the above problems by amplifying the amount of displacement by using a two-stage lever in the banknote thickness detecting device of the automatic teller machine, by installing a shielding plate on the light-receiving side and the light emitting side of the integrated transmission sensor. It is an object of the present invention to provide a banknote thickness detecting device of an automatic teller machine that can more accurately detect two bills and improve productivity and water retention.

Figure 1 is a schematic perspective view showing a bill thickness detection device of a conventional cash dispenser

Figure 2 is a perspective view showing a bill thickness detection device of the automatic teller machine according to an embodiment of the present invention

3 is a perspective view showing a sensor equipped with a shielding plate according to an embodiment of the present invention

Figure 4 is a flow chart showing a method of detecting the thickness of the banknote automatic teller machine according to an embodiment of the present invention

<Explanation of symbols for the main parts of the drawings>

100: bill 200: bearing

300: first lever 400: second lever

500: detection part of the second lever 600: first sensor

700a, 700b: spring 800a, 800b: second sensor

900: shield plate

In order to achieve the above object, the banknote thickness detecting apparatus of the ATM according to the present invention is a banknote detecting apparatus of an ATM for detecting two banknotes using an integral transmission type sensor. A bearing that moves downward, a first lever that rotates about a first fixed point according to the up and down deformation of the bearing, a second lever that rotates about a second fixed point according to the rotation of the lever, A first sensor for detecting a displacement difference due to left and right movements of the second lever, an electronic circuit for changing the detected displacement difference to a voltage displacement difference, and a second lever to be restored when the bill is not transferred And a second sensor which detects a time point at which the banknote arrives at the bearing and starts and finishes the bearing, and manages the memory unit. .

A preferred embodiment of the feature is characterized in that the first fixed point is X: nX and the second fixed point is rotated on the basis of Y: mY.

A preferred embodiment of the above feature is characterized in that the first sensor mounts a shield plate of x-0.2 on the light receiving portion side and the light emitting portion side.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the banknote thickness detecting apparatus of the automatic teller machine of the present invention.

2 is a perspective view showing a banknote thickness detecting device of an ATM according to an embodiment of the present invention, Figure 3 is a perspective view showing a sensor equipped with a shielding plate according to an embodiment of the present invention.

As shown in FIG. 2, the bearing 200 moves up and down according to the thickness of the banknote 100, and rotates about the first fixing point A according to the up and down deformation of the bearing 200. Left and right sides of the first lever 300, the second lever 400 that rotates around the second fixing point B in accordance with the rotation of the first lever 300, and the second lever 400 A second lever detection unit 500 causing a displacement due to movement, a first sensor 600 having a shielding plate on the light-receiving side and the light-emitting side, changing the detected displacement difference into a voltage displacement difference, and the bill 100 Springs 700a and 700b for restoring the first lever 300 and the second lever 400 to their original positions and the bill 100 arrive at the bearing 200 when the bearing 200 is not transferred. And a second sensor (800a, 800b) for managing the memory unit by detecting the start time and the completion time of the up and down movement.

In this case, as illustrated in FIG. 3, the first sensor 600 mounts shielding plates 900a and 900b to the light receiving unit side and the light emitting unit side of the first sensor 600. The shield plates 900a and 900b are L-0.2.

Here, a description will be given of the operation of the banknote thickness detecting device of the ATM according to the present invention configured as described above.

As shown in FIG. 4, when the banknote 100 is transferred to the bearing 200, the second sensors 800a and 800b detect this (S100) and start transmitting voltage change data (S101) to the memory unit of the ATM. do. At this time, the bearing 200 rises by the thickness of the bill 100, and the first lever 300 also moves in proportion to the first fixing point (A).

Subsequently, as the first lever 300 moves, the second lever 400 moves in proportion to the second fixing point B. FIG. At this time, the first fixing point A rotates the first lever 300 as a reference axis at X: 4X, and the second fixing point B moves the second lever 400 to Y. Turn to 3Y as the reference axis. Therefore, the amplification amount is 12 times.

Subsequently, the detection unit 500 of the second lever causes displacement according to the left and right movements of the second lever 400, and the first sensor 600 changes the induced displacement difference into a voltage as shown in FIG. 5A. Induce the output waveform to derive the inflection point.

At this time, if there is a sensor that causes the output waveform as shown in Figure 5b due to the non-uniformity of the light receiving unit width of the first sensor 600.

Therefore, the (x-0.2) mm shielding plate 900a is mounted on the light receiving unit side of the first sensor 600 so that the top dead center and the bottom dead center are clearly implemented regardless of the width of the light receiving unit, and the (x-0.2) on the light emitting unit side. A) mm shield plate 900b is mounted to minimize distortion of the curve due to light scattering effects.

Subsequently, when the second sensors 800a and 800b detect that the banknote 100 has passed through the bearing 200 (S102), the data transmitted to the memory unit is read (S103).

In addition, as shown in FIG. 5A, the AD converter detects a change in units of 0.5 volts and transmits data to the memory unit in response to the change.

At this time, the inflection point is checked using the change of the data transmitted to the memory unit (S104).

For example, the data transferred to the memory

{6,6.5,7,7.5,8,8.5,9,8.5,8,7.5,7,6.5,6,5.5,5,4.5,4,3.5,3,2.5,2,2.5,3,3.5,4 , .......}, the inflection point is 9 volts and 2 volts.

Subsequently, in order to detect sensor defects due to contamination and secular variation during operation of the first sensor 600, it is checked whether Ymax (V) -Ymin (V) between the inflection points is 4 V or more (S105) and 4 (V) or less. On the other hand, it is regarded as a sensor failure, and after error processing (S107), data in the memory unit is erased (S112).

If Ymax (V) -Ymin (V) between the inflection points is 4 (V) or more, the average Ymax (V) of the Ymax (V) and the average Ymin (V) of the Ymin (V) are calculated (S106). The bill thickness is calculated as follows (S108). At this time, the bill thickness calculation is calculated as follows.

t = {(inflection point-1) + (voltage change to inflection point) / (Ymax (V) -Ymin (V)) +

(Voltage change from inflection point) / (Ymax (V) -Ymin (V))} × 0.3 / amplification ratio.

In this embodiment, if the data transmitted to the memory unit is as follows,

{6,6.5,7,7.5,8,8.5,9,8.5,8,7.5,7,6.5,6,5.5,5,4.5,4,3.5,3,2.5,2,2.5,3,3.5,4 , 4.5,5,5.5,6,6.5,7,7.5,8,8.5,8,7.5,7,6.5,6,5.5,5,4.5,4,3.5,3,2.5,2,1.5,2,2.5 , 3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,8.5,8,7.5,7,6.5,6,5.5,5,4.5,4, ... ..} The number of inflection points is 5 because it is 9, 2.5, 8.5, 1.5, 9, the voltage change to the inflection point is 9-6, so it is 3 (V), and the voltage change from the inflection point is 9-4, so it is 5 (V). Ymax (V) is 8.83 (V) and Ymin (V) is 2 (V)

t = {(5-1) + (3 / (8.83-2)) + (5 / (8.83-2))} x 0.3 / 12 = 0.129 mm is calculated.

Here, since the thickness of the new banknote is 0.09 mm, the calculated banknote is compared with 0.16 or less (S109). If the banknote is larger than 0.16, the banknote is regarded as an abnormal banknote, and the data of the memory unit is erased after the banknote collection process (S110). (S112)

At this time, if the banknote thickness is less than 0.16, the banknotes are discharged normally (S111), and then the data of the memory unit is erased. (S112)

As described above, the bill thickness detecting apparatus of the cash dispenser of the present invention has the following effects.

In the lever structure, there is no need to compensate for wear and drift, reducing maintenance and repair costs, and eliminating the need for adjustments in production to improve productivity.

In addition, by installing a shielding plate on the sensor, the difference in voltage curve caused by the characteristic difference of each sensor is homogenized, and the amount of voltage change caused by the characteristic difference of each sensor is included as an algorithm. none.

Therefore, two banknotes can be detected at low cost, and productivity and water retention can be improved.

Claims (3)

In the banknote thickness detecting device of the ATM, which measures the displacement by causing the displacement in the axial structure to detect the banknote thickness of a certain thickness, A bearing 200 that moves up and down according to the banknote 100; A first lever 300 that rotates about a first fixing point A according to an up and down deformation of the bearing 200; A second lever 400 rotating about the second fixing point B according to the rotation of the first lever 300; A detection unit 500 of the second lever that detects a displacement difference due to left / right movement of the second lever 400; A first sensor (600) for changing the detected displacement difference into a voltage and having a shielding plate (900) on the light receiving portion side and the light emitting portion side; Springs 700a and 700b for restoring the first lever 300 and the second lever 400 when they are not transferred; The banknote thickness detecting device of the ATM is characterized in that the banknote 100 comprises a second sensor (800a, 800b) for detecting whether the bearing 200 reaches the bearing (200) to move up and down. The method of claim 1, The first fixing point A rotates the first lever 300 with X: nX as a reference axis, and the second fixing point B moves the second lever 400 with Y: mY. The bill thickness detecting device of the automatic teller machine, characterized in that the pivoting movement with respect to the reference axis. The method of claim 1, The first sensor (600) is a banknote thickness detecting device of the ATM, characterized in that the shield plate 900 of the (x-0.2) is mounted on the light receiving portion side and the light emitting portion side.