KR910007767B1 - Coin selector - Google Patents

Abstract

The coin selector using microcomputer, distinguishes coins by materials from spurious coins and determines each coin denomination. An exciting coil is excited by oscillator, and is connected to a receiver. The automatic vending machine comprises transformer (T) for converting phase contrast of inductive signal from second coil in accordance with the material of the coin (4) fed, code transforming portion for the phase contrast of inductive signal, and micro computer (1).

Description

Curing Discrimination Device and Method

1 is a circuit diagram of a coin discrimination apparatus of the present invention.

2A to 2D are waveform diagrams of the respective parts shown in FIG. 1 when no curing was added.

3A to 3D are waveform diagrams of the respective parts shown in FIG. 1 when curing is added.

4 is a graph showing the storage data of the pyrom according to the passing position of the input curing.

5a-b is a signal flow diagram showing the operation of the microcomputer according to the coin determination method of the present invention.

* Explanation of symbols for the main parts of the drawings

1: microcomputer 3: oscillation unit

4: hardening 5: phase difference detection part

6: multiplexer 7: counter

8: pyrom 9: curing storage control unit

10: hardening storage detection part T: trance

T ₁₁ : primary coil T ₁₂ , T ₁₃ : secondary coil

XT: Crystal

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coin discrimination apparatus and method for discriminating a kind of coin added in a beverage vending machine, a subway ticket vending machine, and a payphone.

In the related art, since the type and diameter of the cured material were determined to determine the type thereof, when a foreign material having the same size and diameter as the hardened material was added, there was a problem such that the cured product was not determined as a counterfeit hardening but was determined as normal hardening.

Accordingly, it is an object of the present invention to provide a hardening determination device and method for accurately determining the type of the hardened material and whether or not counterfeit hardening and normal hardening by using the material of hardened material.

According to the present invention having the above object, when the coin is added, the coin is passed between the primary coil of the transformer and two secondary coils, and the oscillation signal is applied to the primary coil of the transformer by applying the oscillation signal of the oscillator. In this case, the coil is guided to two secondary coils, and when no hardening is applied, there is no phase difference between signals induced by the two secondary coils.

In addition, when the curing is added, the injected curing passes between the primary coil and the secondary coil of the trans, and according to the material of the curing, phase difference occurs between signals induced by two secondary coils, and the phase difference is generated. The detection unit detects the clock signal during the phase difference time, counts the clock signal that is passed, and determines the type of hardening and whether or not normal hardening and counterfeit hardening are applied.

In particular, the present invention is a malfunction of the detection of the curing due to the error of the signal induced from the primary coil to the two secondary coils according to the characteristics of each transformer and the positional error that the injected curing passes between the primary coil of the transformer and the two secondary coils In order to prevent the error, the basic data of each coin and the data added and subtracted a certain tolerance value to the basic data are stored in the pyrom, and by comparing the stored data with the number of counted clock signals, the detected coin is detected. It is possible to accurately determine the type of curing, as well as whether the normal curing and counterfeit curing.

Hereinafter, with reference to the accompanying drawings will be described in detail the curing determination apparatus and method of the present invention having the above object and features as follows.

1 is a circuit diagram of the coin detection device of the present invention, as shown therein, a microcomputer 1 for controlling the overall operation of the coin detection, a crystal XT for oscillating and supplying a clock signal to the microcomputer 1; An oscillation signal by oscillating with an initial reset section 2 composed of a resistor R ₁ and a capacitor C ₁ for resetting the microcomputer 1 at an initial time of applying operating power to a power supply terminal Vcc. The oscillation unit 3 of the coil L, the resistors R ₂ and R ₃ , the buffer BF, the capacitors C ₂ -C ₄ , and the transistor TR ₁ , and the oscillation unit 3 Trans coils (T) for inducing an oscillation signal to different phase differences from the primary coils (T ₁₁ ) to the two secondary coils (T ₁₂ , T ₁₃ ) according to the material of the hardened (4), and the secondary coils of the transformer (T) Resistor (R ₄ , R ₅ ), condenser (C ₅ , C ₆ ), comparator (D ₁₂ , T ₁₃ ) which detects the phase difference of the signal induced by the signal and inputs the interrupt request signal to the microcomputer 1. CO A phase difference detector 5 including MP ₁ , COMP ₂ ) and a NAND gate ND, a multiplexer 6 for selecting and passing a clock signal of the crystal XT during the phase difference detection time of the phase difference detector 5; A counter 7 which counts the clock signal output from the multiplexer 6 and inputs it to the microcomputer 1, and stores basic data of each coin and data obtained by adding and subtracting a predetermined tolerance to the basic data. And a resistor (R ₆ -R ₈ ) and transistor (TR ₂ -TR ₄ ) for classifying accommodating or returning the pyrom (8) outputted to the microcomputer (1), and the coin (4) injected under the control of the microcomputer (1). ) And a photocoupler which detects the passage of the coin storage control unit 9 of the solenoid (SL ₁ -SL ₃ ) and the coin 4 classified and stored by the coin storage control unit 9 and inputs it to the microcomputer 1. in (PC), a resistance (R ₉ -R ₁₂₎ and a transistor (TR ₅₎ curing receiving detector 10 to the Castle was.

When the curing 4 is added in the above, the curing 4 injected is passed between the primary coil T ₁₁ and the secondary coils T ₁₂ and T ₁₃ of the transformer T and the solenoid SL ₁ −. SL ₃ ) is selectively driven so that when the curing 4 is classified and stored, the classified curing 4 passes between the light emitting element LD and the light receiving element PD of the photocoupler PC. If the solenoids (SL ₁ -SL ₃ ) are not all driven, the injected curing (4) is returned.

)에 저전위를 인가하게 되므로 마이콤(1)은 일정시간 동안 리세트 상태를 유지하면서 초기상태로 되고, 크리스탈(XT)은 발진하여 마이콤(1)에 클럭신호를 공급하게 되며, 발진부(3)는 코일(L) 및 콘덴서(C₂,C₃)의 시정수에 따라 발진하고, 그 발진 신호에 의해 트랜지스터(TR₁)가 온 및 오프를 반복하여 트랜스(T)의 일차코일(T₁₁)에 발진신호를 인가하게 되며, 여기서 발진부(4)의 발진신호의 주파수(F)는 다음의 식과 같다.According to the present invention configured as described above, when operating power is applied to the power supply terminal Vcc, the applied operating power is charged to the capacitor C ₁ through the resistor R ₁ of the initial reset unit 2 while the microcomputer is operated for a predetermined time. (1) reset terminal (

Since the low potential is applied to the microcomputer 1, the microcomputer 1 is in an initial state while maintaining the reset state for a predetermined time, and the crystal XT oscillates to supply a clock signal to the microcomputer 1, and the oscillator 3 Oscillates according to the time constants of the coil L and the capacitors C ₂ and C ₃ , and the transistor TR ₁ is repeatedly turned on and off in response to the oscillation signal and the primary coil T ₁₁ of the transformer T is repeated. An oscillation signal is applied to the oscillation signal, where the frequency F of the oscillation signal of the oscillator 4 is expressed by the following equation.

In this case, when the hardening 4 is not added, the comparator of the phase difference detection unit 5 does not have a phase difference of the signal induced from the primary coil T ₁₁ of the transformer T to the secondary coils T ₁₂ and T ₁₃ . Since the signals V _a and V _b respectively applied to the inverting input terminals (-) and (-) of (COMP ₁ ) and (COMP ₂ ) have a phase difference of 180 ° C as shown in FIG. COMP ₁ ) (COMP ₂ ) repeatedly outputs low and high potential pulse signals alternately as shown in FIGS. 2b and c, and the NAND gate ND is shown in FIG. 2d. As described above, the high potential is continuously output so that the multiplexer 6 does not output the clock signal of the crystal XT.

)에 인가하게 된다.In addition, when the curing 4 is added, the injected curing 4 passes between the primary coils T ₁₁ and the secondary coils T ₁₂ and T ₁₃ of the transformer T and the Depending on the material, the signals induced by the secondary coils T ₁₂ and T ₁₃ have a mutual phase difference, and the inverting input terminals (-) (-) of the comparator COMP ₁ and COMP ₂ are shown in FIG. since mutual constant signal having a phase difference (V _a) (V _b) are respectively input as the comparator (COMP ₁₎ (COMP ₂₎ is to output the pulse signal as shown in Fig claim 3c road and d, NAND gate (ND) outputs the low potential phase difference detection signal shown in FIG. 3d to control terminal of the multiplexer 6 (

) Is applied.

Therefore, the multiplexer 6 selects the clock signal of the crystal XT input to the input terminal B while the NAND gate ND outputs the phase difference detection signal of low potential, and outputs the output signal to the output terminal OT. The output clock signal is applied to the clock terminal CK of the counter 7, and the counter 7 counts the clock signal, outputs it to the output terminal OUT, and applies it to the input port D ₁ of the microcomputer 1. Done.

)로 저전위의 인터럽트 요청신호가 입력되고, 낸드 게이트(ND)에서 고전위가 출력되면, 멀티플렉서(6)는 더 이상의 클럭 신호를 통과시키지 않게 되어 카운터(7)가 클럭신호의 카운트 동작을 정지하게 되고, 마이콤(1)은 카운터(7)가 현재까지 카운트한 클럭신호의 수를 입력한후 어드레스 포트(AD)로 어드레스 신호를 출력하면서 피롬(8)에 저장되어 있는 테이타를 입력포트(D₂)로 하나씩 입력하여 카운트한 클럭 신호의 수와 비교하며, 이때 클럭신호의 수와 동일한 테이타가 피롬(8)에 저장되어 있지 않을 경우에는 마이콤(1)은 이를 위조경화로 판별하고 에러로 처리하며, 경화 수납 제어부(9)를 동작시키지 않아 투입된 경화(4)가 그대로 반환되도록 하게 된다.In this state the low potential on the comparator (COMP ₁₎ is output at the same interrupt request terminal of the microcomputer (1) (

When the interrupt request signal of low potential is input and the high potential is output from the NAND gate ND, the multiplexer 6 does not pass any more clock signals, and the counter 7 stops counting the clock signal. The microcomputer 1 inputs the number of clock signals counted by the counter 7 to the present and outputs the address signal to the address port AD while inputting the data stored in the pyrom 8. ₂ ) and compare it with the number of clock signals input and counting one by one.If the same data as the number of clock signals is not stored in the pyrom (8), the microcomputer (1) determines this as a counterfeit hardening and treats it as an error. In addition, the curing storage control unit 9 is not operated so that the injected curing 4 is returned as it is.

If the number of clock signals counted by the counter 7 is the same as any one of the data stored in the pyramid 8, the microcomputer 1 determines that the inserted curing 4 is the curing and the curing is performed with the same data. After determining the type of (4), the cured storage control unit 9 is operated according to the type of the cured 4 to classify and store the added cured 4, i.e., the type of the cured 4 added is 100. In the case of a circle, the output of the high potential is output to the output terminal P ₀ to turn on the transistor TR ₂ , and the solenoid SL ₁ is driven to store in a storage position of 100 won (4). In the case of a compact, the solenoid SL ₂ is driven to store it in the storage position of the 50 won hardened 4, and the hardened 4 is classified and stored according to the type of hardened 4 so that the input terminal IN Whether or not the coin 4 is stored is determined by the input signal, i.e., if the coin 4 is not stored, Since the light of the light emitting element LD of the photocoupler PC of the detector 10 is continuously incident to the light receiving element PD, it is kept in the on state, and the transistor TR ₅ is also in the on state. When the low potential is input to the input terminal IN of the C1 and the hardening 4 is accommodated, the hardening 4 to be stored passes between the light emitting device LD and the light receiving device PD. ), The light receiving element PD is turned off, the transistor TR ₅ is turned off, and a high potential is input to the input terminal IN. As a signal input to the input terminal IN, the microcomputer 1 When the coin 4 is stored and the coin 4 is stored, the signal of the kind of coin 4 input to the main control unit is transmitted to perform the operation accordingly, and the coin 4 is not stored. In this case, it is treated as an error.

Here, due to the positional error of the hardening (4) passing between the primary coil (T ₁₁ ) and the secondary coil (T ₁₂ , T ₁₃ ) of the transformer (T) over time to the secondary coil (T ₁₂ , T ₁₃ ) An error occurs in the phase difference of the induced signal, and the number of clock signals counted by the counter 7 gradually decreases from the center of the transformer T as shown in FIG. The data is stored in consideration of the error.

5a and b are signal flow diagrams showing the operation process of the microcomputer 1 according to the coin determination method of the present invention. In the present invention, the initialization operation is performed in step 100, the pyrom 8 is tested in step 101, and in step 102, the curing 4 is input by determining whether the curing 4 is loaded. In step 103, the data stored in the pyrom 8 is input as time elapses, and in step 104, the input data and the number of clock signals clocked by the counter 7 are not equal. Otherwise, it is determined as an error in step 105, and if it is the same, the type of coin 4 is determined by the inputted data in step 106, and the coin storage control unit 9 is operated to classify the coin 4 introduced. If the curing 4 has been stored in step 107, it is determined whether or not the curing 4 is received by the signal of the input terminal IN. In this case, it is determined as an error in step 108 and is performed again from the initial operation.

)로 인터럽트 요청신호가 입력되면, 마이콤(1)은 단계(110)에서 카운터(7)가 카운트한 클럭신호의 수를 입력하고, 단계(111)에서 클럭신호의 수를 체크하여 있을 경우에 단계(112)에서 카운터(7)가 클럭신호의 수를 다시 카운트하기 시작하도록 하게 된다.And, as shown in Figure 5b interrupt request terminal (

When the interrupt request signal is inputted, the microcomputer 1 inputs the number of clock signals counted by the counter 7 in step 110, and checks the number of clock signals in step 111. At 112, the counter 7 starts to count the number of clock signals again.

As described in detail above, the present invention senses the added cure as its material, so that it is possible to accurately determine the type of cure, as well as to accurately determine whether the cure is counterfeit cure or normal cure.

Claims (3)

In the coin discrimination apparatus for discriminating the type of coin hardened by using a microcomputer, a phase shift between a transformer for changing the phase difference of a signal induced by two secondary coils according to the material of the coin hardened, and a phase difference of the signal induced by the two secondary coils A code conversion unit for converting a signal into a code signal, a microcomputer for determining the type of coin added by comparing the code signal inputted from the code converter with a basic code stored in a pyrom, and a coin storage detection unit for detecting the storage of the coin. Curing determination device, characterized in that. The phase difference detector of claim 1, wherein the code converter outputs a phase difference detection signal as a signal induced by two secondary coils, and inputs an interrupt request signal to the microcomputer when the output of the phase difference detection signal is completed; And a counter for selecting and outputting a clock signal according to a detection signal, and a counter for counting a clock signal output by the multiplexer and inputting the clock signal to the microcomputer. In the coin discrimination method to determine the type of coin added using a microcomputer, the phase of the two signals is changed according to the material of the coin added, the phase difference between the two signals is detected, and the clock signal is counted for the time of the phase difference. A coin discrimination method, characterized in that for generating a signal and comparing the code signal with the stored code signal to determine the type of coin added.

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