KR950009844B1 - Apparatus for detecting disconnection of solenoid wiring circuit of an automatic vending machine - Google Patents

Abstract

a sensor connected between one terminal of a switch of a surge absorbing relay and one terminal of a switch of a selling relay; and a display having a plurality of sold-out lamps and a plurality of inverters for displaying a disconnection state through the sold-out lamp of a corresponding column in accordance with an output signal of the sensor.

Description

Disconnection detection device of solenoid wiring circuit of vending machine

1 is a circuit diagram showing the present invention.

2 is a timing chart for explaining the present invention.

3 is a flowchart showing the present invention.

* Explanation of symbols for main parts of the drawings

10: micom 13: disconnection status display unit

21: detection unit CT: current transformer

C1: Capacitor D1: Diode

R1: resistance

The present invention relates to a vending machine for the automatic sale of canned beverages, and in particular, a solenoid of a vending machine that detects a case in which a disconnection occurs in a solenoid wiring circuit that regulates the discharge of cans and informs the outside of the abnormal condition and returns the input coins. An apparatus for detecting disconnection of wiring circuits.

Conventional can drink vending machines are structurally important electrical elements such as main circuit boards and solenoids are wired through several contacts (relays, connectors), so that the parts are likely to be disconnected. In the case of disconnection, the product is not taken out and only the input coin is accepted, causing consumer dissatisfaction, and thus, the consumer may exert excessive force on the vending machine, causing the vending machine to malfunction.

Therefore, the present invention has been made in order to solve the above-described conventional problems, it is possible to take a quick and accurate action by detecting the case of disconnection occurs in the solenoid wiring circuit part of the vending machine and returning the coin put in and telling the disconnection state to the outside. It is an object of the present invention to provide a disconnection detection device for a solenoid wiring circuit of a vending machine.

A solenoid wiring circuit of a vending machine characterized by a microcomputer control for realizing such a purpose, comprising: a sensing unit interposed between one end of a switch unit of a surge absorption relay and one end of a switch unit of a sales relay, and a signal of the sensing unit; And a disconnection state display unit for displaying the disconnection state according to the presence or absence of a sold out lamp of the corresponding column.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a circuit diagram of the present invention, in which an ordinary coin mechanism 11 is connected to an input / output terminal P1 of a microcomputer 10 that centrally controls the system, and the price is set, coin input detection and change calculation are performed. (10) and receive the data. In addition, the selection button unit 12 configured in the key input form is connected to the microcomputer input terminal PI1, and the signal input from the selection button unit 12 is controlled by the microcomputer 10 to the microcomputer output terminals PO2 to PO7. Outputs the controlled signal to power the respective solenoids S1 to S16 by driving the sales relays RY1 to RY16 in response to the key input of the surge absorption relay RY0 and the selection button unit 12. It is to dispense the beverage cans by applying. Here, the surge absorbing relay RY0 means that the relays RY1 to RY16 are not switched to prevent deterioration and failure of the sales relays RY1 to RY16 due to on and off surges of the solenoids S1 to S16. By switching only to the absorption relay (RY0) and absorbing surge by switching, the relay for sale (RY1 to RY16) eventually makes a passage to prevent deterioration and failure.

Accordingly, the coil section of the surge absorption relay RY0 is connected to the microcomputer output terminal PO2 via the buffer BF, and the relay control driver 14 and the inverter IV1 (the microcom output terminals PO3 to PO7 are connected to the microcomputer output terminal PO2. IV2) is connected, and the coil parts of the relays RY1 to RY16 for sale are connected to the output terminals of the inverters IV1 and IV2. In addition, by connecting the switch contact portion of the surge absorption relay RY0 and the switch contact portion of the sales relays RY1 to RY16, an AC power source AC is applied to one end and one end of the switch contact portion of the sales relay RY1 to RT16. Each solenoid S1 to S16 is connected to each other. In addition, the sensing unit 21 composed of the current transformer CT, the resistor R1, the diode D1, the capacitor C1, and the like is connected to the microcomputer input terminal PI2, and the current transformer CT is absorbed by surge. Inductive electromotive force is applied to the current transformer CT when a current flows between the one end of the switch contact of the relay RY0 and the end of the switch contact of the relay RY1 and the current flows between the two relays RY0 and RY1. The induced current flows and is rectified while passing through the resistor R1, the diode D1, and the capacitor C1, and inputs a constant pulse signal to the input terminal P12.

The signal input to the microcomputer input terminal PI2 is judged and controlled by the microcomputer 10, and if abnormal, the resistors RA1 to RA16 connected to the microcomputer output terminal PO1, the sold out lamps L1 to L16, and the inverter IA1. A fault signal is output to the disconnection state display unit 13 composed of ˜IA16) to light the corresponding sold out lamp.

Unexplained sign Vcc is DC power supply and COM is common terminal

Referring to Figures 2 and 3 of the operation and effect of the present invention configured as described above are as follows.

Turn on the vending machine and insert the coin. Then press the Select button. At this time, the sales relays RY1 to RY16 selected from this time t1 are turned on at the time t1 shown in FIG. 2A, and the selling price signal is transmitted to the coin mechanism 11. Then, the surge absorption relay RY0 is turned on at time t2 after 100 mscc to drive the selected solenoids S1 to S16.

FIG. 2B shows the ON signal of the surge absorption relay RY0 and is turned off at time t3 to stop the driving of the solenoids S1 to S16.

Further, the sales relays RY1 to RY16 are turned off at a time t4 100 mscc after the time t3.

Here, as shown in (C), the microcomputer 10 determines whether a pulse is input to the microcomputer input terminal PI2 between the time t2 and the time t3. If the pulse is input, the solenoid wiring circuit has no problem. Judge and continue normal operation. However, if no pulse is input, it means that no induced electromotive force is generated in the current transformer (CT), that is, the switch portion of the surge absorption relay (RY0) and the switch portion and solenoids (S1 to S16) of the commercial relays (RY1 to RY16). By means of the disconnection between the common terminal (COM) of, as shown in 2d as shown in 2d in the selling price return signal is not sent to the coin mechanism 11 to return the coin entered, the microcomputer output terminal (PO1) By sending an output signal to the disconnection state display unit 13, the lamps L1 to L16 of the corresponding columns are turned on (the corresponding column is sold out).

For example, when column 15 is defective, the microcomputer 10 outputs a high level signal to the inverter IA15. Therefore, the output signal is inverted through the inverter IA15 so that the sold out lamp L15 is turned on and turned on. In the case of other columns, the operation of turning on the sold out lamps L1 to L16 is the same.

As described above, the present invention easily detects the case where a disconnection occurs in the solenoid wiring circuit of the vending machine by using the sensing unit 21 and the disconnection state display unit 13 having a simple structure, and returns the coin that has been injected and disconnected to the outside. This is an advantage that you can take prompt action by letting you know through the sold out lamp.

Claims (2)

In the solenoid wiring circuit of the vending machine characterized by the microcomputer control, the sensing unit 21 interposed between one end of the switch portion of the surge absorption relay RY0 and one end of the switch portion of the sales relay RY1 and a resistor ( It consists of RA1 to RA16, sold out lamps L1 to L16 and inverters IA1 to IA16, and shows the disconnection state according to the presence or absence of a signal from the sensing unit 21 as the sold out lamps L1 to L16 of the corresponding column. A disconnection detection device for a solenoid wiring circuit of a vending machine, comprising a display unit (13). The current transformer TS of claim 1, wherein the sensing unit 21 is connected to one end of the switch unit of the surge absorption relay RY0 and one end of the switch unit of the sales relay RY1 and the current transformer. A disconnection detection device for a solenoid wiring circuit of a vending machine, comprising a diode (D1), a resistor (R1), and a capacitor (C1) connected to one side of a TS).