KR102621312B1 - Escrow unit control device of automated teller machine - Google Patents

Abstract

One embodiment of the escrow unit control device of the financial automated machine is an escrow unit control device of the financial automated machine for controlling the rotating position of the drum provided in the escrow unit where banknotes are stored in the financial automated machine, wherein the rotation axis of the drum A first gear coupled to one side of; a second gear coupled to one side of the first gear; a first magnetic body provided at the rotation center of the first gear; a second magnetic body provided at the rotation center of the second gear; a first position detection unit that detects a change in the position of the first magnetic body due to rotation of the drum in units of a set first resolution angle; a second position detection unit that detects a change in the position of the second magnetic body due to rotation of the drum in units of a set second resolution angle; And a control unit that controls the position at which the drum is rotated based on the position change of the first magnetic body detected by the first position detection unit and the position change of the second magnetic body detected by the second position detection unit. Includes.

Description

Escrow unit control device of automated teller machine}

The present invention relates to an escrow unit control device for an automated financial machine, and more specifically, to an escrow unit control device for an automated financial machine that can precisely control the rotating position of a drum provided in an escrow unit.

In general, automated financial machines are equipped with an escrow unit to store banknotes when depositing or withdrawing them. For example, tape and banknotes are wound around a drum to store them, a reel is wound, and the drum is rewound to release the banknotes. There is an escrow unit that winds the tape on a reel.

In this way, the escrow unit equipped with the drum and reel is equipped with a device to measure and control the rotating position of the drum. Conventional representative drum rotation speed detection devices can be broadly classified into incremental encoders and absolute encoders depending on the method of detecting the rotating position.

A conventional incremental encoder is a device that detects the amount of rotation by counting the number of pulses according to the change in the rotational movement of an object rotating around an axis. The number of pulses increases with each rotation, causing the object to rotate. Position and rotation speed are measured.

In such an incremental encoder, the A phase and B phase have a phase difference of 90 degrees, and there is a Z phase for determining the origin phase from which one pulse is obtained per rotation to detect the rotation origin. When the output voltage of phase A is 90 degrees ahead of the output voltage of phase B, the drum is rotating in the forward direction, and when the output voltage of phase A is 90 degrees behind the output voltage of phase B, the drum can be detected to be rotating in the reverse direction. However, such an incremental encoder has the disadvantage that the origin cannot be known when the drum's origin phase is measured only based on the Z phase, so when the power is turned off and then turned on again.

In the case of equipment or parts that do not fundamentally need the origin, it does not matter much, but if deceleration overrun, which is a phenomenon in which the drum rotates further than the position set by rotational inertia, is repeated, such as in the escrow unit, the length of the tape increases. In the case of a device that can be measured, the error in the measurement range becomes larger when the mechanical error, rotation error, and arrangement error of the encoder's rotating disc slot are combined.

If the error increases in this way, even if the rotating drum is stopped, it may not stop accurately at the set position and may rotate further and overrun, or, conversely, may rotate less. In this case, there is a problem in that the lifespan of the tape is gradually reduced.

On the other hand, the conventional absolute encoder divides the disk at a constant ratio from 0 to 360 degrees around its central axis, detects the rotational movement of the rotating object by specifying an electrical signal generated at each divided position, and detects the rotational movement of the rotating object to determine the position. It is a device that detects the amount of rotation by generating an appropriate electrical signal. The best resolution of such a conventional absolute encoder is about 1.2 degrees per rotation (360 degrees), but the drum of a conventional escrow unit has a resolution of 4 degrees, 6 degrees, or 10 degrees, so the position at which the drum is rotated There is a problem with limitations in precisely controlling.

In addition, the conventional absolute encoder must be used after returning to the origin (reference point) each time it is used. It has a binary encoded position code in the form of a disk and uses a method of reading the position, but it is not possible to return to the exact position of the origin. The structure of the device for returning the drum and the structure for accurately detecting the rotated position of the drum are complex, and as a result, there is a problem in that the manufacturing cost of the device increases.

Prior art related to an escrow unit equipped with a conventional drum and reel is disclosed in Republic of Korea Patent No. 10-1776306.

The present invention was developed to solve the above-mentioned problems, and is an escrow unit control device for a financial automation machine that can precisely control the rotational position of the target drum by precisely measuring the absolute origin of the drum provided in the escrow unit. The purpose is to provide.

The escrow unit control device of the financial automation machine of the present invention for realizing the above-described purpose is the escrow unit of the financial automation machine for controlling the rotating position of the drum provided in the escrow unit where banknotes are stored in the financial automation machine. A control device, comprising: a first gear coupled to one side of the rotation axis of the drum; a second gear coupled to one side of the first gear; a first magnetic body provided at the rotation center of the first gear; a second magnetic body provided at the rotation center of the second gear; a first position detection unit that detects a change in the position of the first magnetic body due to rotation of the drum in units of a set first resolution angle; a second position detection unit that detects a change in the position of the second magnetic body due to rotation of the drum in units of a set second resolution angle; And a control unit that controls the position at which the drum is rotated based on the position change of the first magnetic body detected by the first position detection unit and the position change of the second magnetic body detected by the second position detection unit. Includes.

The control unit controls the first magnetic body and the The origin of the second magnetic material is stored, respectively, and the position change of the first magnetic material and the second magnetic material detected by the first and second position sensing units while the drum is rotating is detected by the first magnetic material and the second magnetic material. The rotational position of the drum can be controlled by calculating the number of rotations of the drum from the initial setting position in comparison with the origin of the magnetic material.

It further includes an input unit for inputting data corresponding to the target rotation speed of the drum, the first resolution angle, and the second resolution angle, and the control unit, based on the data input through the input unit, Calculate a first circulation cycle that is the target rotation speed of the drum divided by the first resolution angle, and a second circulation cycle that is the target rotation speed of the drum divided by the second resolution angle, and the first circulation cycle and the second resolution angle are calculated. By calculating the least common multiple of the two circulation cycles and calculating the number of rotations of the drum until the first magnetic material and the second magnetic material return to the set origin, the current rotated position of the drum can be calculated.

The control unit may calculate the deceleration time of the drum so that the drum reaches the target rotation speed and stops at a fixed position.

The controller may control the drum to prevent overrun by setting a stop section of the drum such that the drum reaches the target rotation speed and stops at a fixed position.

The first position detection unit and the second position detection unit may be configured to detect the positions of the first magnetic body and the second magnetic body by decomposing them into 12 bits, respectively.

At least one of the first gear and the second gear may be configured as an anti-backlash gear.

The initial position at which the drum stops may be set as the position when all the tape and bills wound around the drum are discharged from the drum.

According to the escrow unit control device of the financial automation device according to the present invention, the rotational position of the drum can be precisely controlled by precisely measuring the absolute origin of the drum and accurately controlling the deceleration time of the drum, thereby preventing the drum overrun phenomenon. This prevents shortening of the lifespan of the tape and improves the quality of stacking banknotes.

1 is a plan schematic diagram of an escrow unit control device according to the present invention;
2 is a side schematic diagram of an escrow unit control device according to the present invention;
Figure 3 is a control block diagram of the escrow unit control device according to the present invention;
Figure 4 is a flow chart showing the escrow unit control steps according to the present invention;
Figure 5 is a table of measurement data at 360 rotation resolution with 4 gears in the escrow unit control device according to an embodiment of the present invention;
Figures 6 and 7 are measurement data tables when the resolution angle for each gear is set differently at 360 rotation resolution with two gears in the escrow unit control device according to another embodiment of the present invention.

Hereinafter, the structure and operation of a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

Referring to FIGS. 1 to 3, the escrow unit control device 100 of the automated financial machine of the present invention is used to control the rotating position of the drum 110 provided in the escrow unit where banknotes are stored in the automated financial machine. As a device, a first gear 120, a second gear 130, a first magnetic body 140, a second magnetic body 150, a first position detection unit 161, a second position detection unit 162, and a control unit. It is composed including (180).

When storing bills, a double tape and bills sandwiched between the double tapes are wound around the outer circumferential surface of the drum 110 and stored together, and when bills are released, the tape and bills wrapped around the drum 110 are separated from the drum 110. It is rewound and released from the drum 110.

The first gear 120 is coupled to one side of the rotation axis 111 of the drum 110, and a first magnetic body 140 having an N pole and an S pole is provided at the rotation center of the first gear 120.

The second gear 130 is gear-coupled to one side of the first gear 120, and a second magnetic body 150 having an N pole and an S pole is provided at the rotation center of the second gear 130.

At least one of the first gear 120 and the second gear 130 may be configured as an anti-backlash gear. In one embodiment, the second gear 130 is provided with elastic members 131 and 132 on both sides of the rotation center to apply an elastic force to rotate the second gear 130 in one direction, thereby connecting the first gear 120 and the second gear 130 to one another. The two gears 130 are configured to minimize mechanical errors between the tooth surfaces by preventing backlash from occurring between the teeth surfaces that are engaged with each other.

When the drum 110 is rotated, the first gear 120 connected to the rotation axis 111 of the drum 110 and the second gear 130 coupled to the first gear 120 rotate in conjunction with each other. And, the rotational position (phase) of the first magnetic body 140 provided in the first gear 120 and the second magnetic body 150 provided in the second gear 130 also changes.

The first position detection unit 161 is provided at a position facing the first magnetic body 140 with a predetermined gap to detect a change in the position of the first magnetic body 140, and the second position detection unit 162 It is provided at a position facing the second magnetic material 150 with a predetermined gap to detect a change in the position of the second magnetic material 150.

The first position detection unit 161 detects the change in position of the first magnetic body 140 due to rotation of the drum 110 in units of a set first resolution angle, and the second position detection unit 162 detects the change in position of the first magnetic body 140 due to the rotation of the drum 110. A change in the position of the second magnetic body 150 due to the rotation of 110) is detected in units of a set second resolution angle.

In one embodiment, the first position detection unit 161 and the second position detection unit 162 are capable of detecting the positions of the first magnetic body 140 and the second magnetic body 150 by decomposing them into 12BITs, respectively. It can be composed of a chip that can be used. In this case, the first position detection unit 161 and the second position detection unit 162 detect the first magnetic material 140 with a resolution of 1 rotation divided by 2 ¹² = 4096, that is, (360 degrees / 4096) ≒ 0.09 degrees. The position of the second magnetic material 150 can be detected precisely.

The control unit 180 includes data corresponding to the target rotation speed of the drum 110 input through the input unit 170, the first resolution angle, and the second resolution angle, and the first position detection unit ( Position information of the first magnetic body 140 detected by 161 and position information of the second magnetic body 150 detected by the second position detection unit 162 are input. In one embodiment, the target rotation speed of the drum 110 may be set to the rotation speed of the drum 110 required from the state in which bills are wound and stored on the outer peripheral surface of the drum 110 until the bills are rewound and completely discharged. .

The control unit 180 tracks the current rotated position of the drum 110 based on the input data and location information and compares it with the pre-stored test results shown in FIGS. 5 to 7. , the driving of the drum driving unit 191, which rotates the drum 110 so that the drum 110 is rotated to the set target position, and the transport path driving unit 192, which transports banknotes, are controlled.

The control unit 180 determines the position of the first magnetic body 140 detected by the first position detection unit 161 at the initial set position where the drum 110 stops, and the second position detection unit 162. Based on the position of the second magnetic material 150 detected, the origins of the first magnetic material 140 and the second magnetic material 150 are stored. In one embodiment, the initial setting position where the drum 110 stops may be set to a position when all the tape and bills wound around the drum 110 are discharged from the drum 110.

And, the control unit 180 detects the first magnetic body 140 and the second magnetic body 150 by the first position detection unit 161 and the second position detection unit 162 while the drum is rotating. By comparing the change in position with the origin of the first magnetic body 140 and the second magnetic body 150, the number of rotations by which the drum 110 is rotated from the origin, which is the initial setting position, is calculated to calculate the number of rotations at which the drum 110 is currently rotated. By accurately determining the position, the drum 110 can be controlled to rotate to the target position and stop at the exact position.

In addition, based on the data input through the input unit 170, the control unit 180 generates a first circulation period that is the target rotation speed of the drum 110 divided by the first resolution angle, and the drum ( Calculate the second circulation period, which is a value obtained by dividing the target rotation speed of 110) by the second resolution angle, and calculate the least common multiple (lcm) of the first circulation period and the second circulation period to determine the first magnetic material 140 and the second circulation period. 2By calculating the number of rotations of the drum 110 until the magnetic material 150 returns to the set origin, the current rotated position of the drum 110 and the number of rotations at which it will further rotate in the future can be calculated.

The least common multiple (lcm) can be calculated by combining [Equation 1] and [Equation 2] below. In the equation below, a and b are the first and second cycle, lcm(a,b) is the least common multiple of the first and second cycle, and gcd(a,b) are the first and second cycle. The greatest common divisor of the cycle, Cn(t), represents the Ramanu sum function, and these equations 1 and 2 are known equations for calculating the least common multiple.

Referring to FIG. 4, when the resolution is set in the first position detection unit 161 and the second position detection unit 162 through the input unit 170 and the drum 110 is rotated, the control unit 180 By comparing the measured values detected by the first position detection unit 161 and the second position detection unit 162 with the previously measured origin, the rotated position of the drum 110 from the origin can be tracked, and based on this, The control unit 180 may calculate the deceleration time of the drum 110 so that the drum 110 reaches the target rotation speed and stops at a fixed position.

In addition, the control unit 180 can control the drum 110 to prevent overrun by setting the stop section of the drum 110 so that the drum 110 reaches the target rotation speed and stops at a fixed position.

Hereinafter, with reference to FIGS. 5 to 7, an embodiment of the position control process of the drum 110 using the escrow unit control device 100 of the automated financial machine of the present invention will be described.

The embodiment shown in FIG. 5 shows a case where, in addition to the first gear 120 and the second gear 130, a third gear and a fourth gear are additionally included.

In this embodiment, the target rotation speed of the drum 110 is set to 360 rotations, and the goal is to detect the 360-degree rotation in 1-degree increments.

If the goal is to detect 360 rotations of the drum 110 in 1-degree increments using four gears, the circulation period for each gear can be calculated as follows.

1st gear = 45 degrees resolution angle → 360 rotations/45 degrees = 1st circulation cycle 8

2nd gear = 36 degrees resolution angle → 360 rotation/36 degrees = 2nd circulation cycle 10

3rd gear = 30 degrees resolution angle → 360 rotation/30 degrees = 2nd cycle 12

4th gear = 20 degrees resolution angle → 360 rotations/20 degrees = 2nd cycle 18

In Figures 5 to 7, squares indicate the circulation period and origin for each gear.

When combining four gears as above, the rotation speed of the drum 110 until it returns to the initial origin can be calculated by calculating the least common multiple as shown below.

lcm(8, 10, 12, 18) = ｜8*10*12*18｜/gcd(8, 10, 12, 18) = 360 rotations

If the algorithm is written with four gears as above, not only will there be a cost loss, but an accumulated error will also occur due to backlash due to the combination of several gears. Therefore, below is an embodiment in which the width of the resolution is reduced to two gears. Let's explain.

In the embodiment shown in FIG. 6, when the first gear 120 and the second gear 130 are combined and the goal is to detect 360 rotations in 1 degree units, the circulation period is calculated for each gear as follows. You can.

1st gear = 8 degrees resolution angle → 360 rotations/8 degrees = 1st cycle cycle 45

2nd gear = 15 degrees resolution angle → 360 rotations/15 degrees = 2nd cycle cycle 24

When two gears are combined as shown above, the number of rotations of the drum 110 until it returns to the initial origin can be calculated by calculating the least common multiple as shown below.

lcm(45, 24) = ｜45*24｜/gcd(45, 24) = 360 rotations

In addition to the example above, it is possible to detect 360 rotations in 1-degree increments by setting the resolution angles of the first and second gears to 8 degrees and 45 degrees, which is a more relaxed condition.

1st gear = 8 degrees resolution angle → 360 rotations/8 degrees = 1st cycle cycle 45

2nd gear = 45 degrees resolution angle → 360 rotation/45 degrees = 2nd cycle 8

lcm(45, 8) = ｜45*8｜/gcd(45, 8) = 360 rotations

In another embodiment, if you want to increase precision and set 360 rotations in 0.5 degree increments, the resolution angle of the first gear can be set to 8 degrees, and the resolution angle of the second gear can be set to 22.5 degrees, as shown in Figure 7. In this case, when the drum 110 rotates 720 times as shown below, it returns to the origin.

1st gear = 8 degrees resolution angle → 360 rotations/8 degrees = 1st cycle cycle 45

2nd gear = 22.5 degrees resolution angle → 360 rotations/22.5 degrees = 2nd cycle cycle 16

lcm(45, 16) = ｜45*16｜/gcd(45, 16) = 720 rotations

As described above, in the present invention, the target rotation speed of the drum 110 is set, the first resolution angle of the first position detection unit 161, and the second resolution angle of the second position detection unit 162 are set, By detecting the change in position of the first magnetic material 140 provided in the first gear 120 and the second magnetic material 150 provided in the second gear 120, the current drum 110 is compared with the initially set origin. By accurately tracking this rotated position, the drum 110 can be precisely controlled to rotate to a set position, for example, the target rotation speed of the drum 110.

As such, in the present invention, the rotational position of the drum 110 can be precisely controlled by accurately measuring the absolute origin of the drum 110 and accurately controlling the deceleration time of the drum 110. By preventing the overrun phenomenon, shortening the lifespan of the tape can be prevented and the quality of stacking banknotes can be improved.

As described above, the present invention is not limited to the above-described embodiments, and obvious modifications can be made by those skilled in the art without departing from the technical spirit of the present invention as claimed in the claims. It is possible, and such modifications fall within the scope of the present invention.

100: Escrow unit control device 110: Drum
111: rotation axis 120: first gear
130: second gear 131,132: elastic member
140: first magnetic material 150: second magnetic material
161: first position detection unit 162: second position detection unit
170: input unit 180: control unit
191: drum driving part 192: conveyance path driving part

Claims (8)

An escrow unit control device for a financial automation machine for controlling the rotating position of a drum provided in an escrow unit where banknotes are stored in a financial automation machine,
A first gear coupled to one side of the rotation axis of the drum;
a second gear coupled to one side of the first gear;
a first magnetic body provided at the rotation center of the first gear;
a second magnetic body provided at the rotation center of the second gear;
a first position detection unit that detects a change in the position of the first magnetic body due to rotation of the drum in units of a set first resolution angle;
a second position detection unit that detects a change in the position of the second magnetic body due to rotation of the drum in units of a set second resolution angle; and
a control unit that controls the rotational position of the drum based on the position change of the first magnetic body detected by the first position detection unit and the position change of the second magnetic body detected by the second position detection unit;
An escrow unit control device for a financial automation device including a. According to paragraph 1,
The control unit controls the first magnetic body and the The origin of the second magnetic material is stored, respectively, and the position change of the first magnetic material and the second magnetic material detected by the first and second position sensing units while the drum is rotating is detected by the first magnetic material and the second magnetic material. An escrow unit control device for a financial automated teller machine, characterized in that the rotation position of the drum is controlled by calculating the number of rotations of the drum from the initial setting position in comparison with the origin of the magnetic material. According to paragraph 1,
Further comprising an input unit for inputting data corresponding to the target rotation speed of the drum, the first resolution angle, and the second resolution angle,
Based on the data input through the input unit, the control unit generates a first circulation cycle that is calculated by dividing the target rotation speed of the drum by the first resolution angle, and dividing the target rotation speed of the drum by the second resolution angle. Calculate the second circulation period, which is the value, calculate the least common multiple of the first circulation period and the second circulation period, and calculate the number of rotations of the drum until the first magnetic body and the second magnetic body return to the set origin. By doing so, the escrow unit control device of the financial automation machine, characterized in that it calculates the current rotated position of the drum. According to paragraph 3,
The control unit is characterized in that the control unit calculates the deceleration time of the drum so that the drum reaches the target rotation speed and stops at a fixed position. According to paragraph 3,
The control unit controls the escrow unit of a financial automated teller machine to prevent overrun of the drum by setting a stop section of the drum so that the drum reaches the target rotation speed and stops at a fixed position. According to paragraph 1,
The escrow unit control device of the automated financial machine, characterized in that the first position detection unit and the second position detection unit decompose the positions of the first magnetic body and the second magnetic body into 12 bits and detect them, respectively. According to paragraph 1,
An escrow unit control device for a financial automation machine, characterized in that at least one of the first gear and the second gear is an anti-backlash gear. According to paragraph 1,
The initial setting position at which the drum stops is set to the position when all the tape and bills wound around the drum are discharged from the drum.

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