CN216670682U

CN216670682U - Startup and shutdown control circuit for self-service equipment

Info

Publication number: CN216670682U
Application number: CN202220166946.5U
Authority: CN
Inventors: 石富天; 烟兴兴; 多如意; 张卫波; 沈立伟
Original assignee: Hebei Huijin Group Co ltd
Current assignee: Hebei Huijin Group Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-06-03
Anticipated expiration: 2032-01-21

Abstract

The utility model discloses a startup and shutdown control circuit for self-service equipment, which belongs to the technical field of self-service equipment and comprises a startup and shutdown key, a power supply and a power supply control circuit for connecting the power supply and a mainboard, wherein the public end of the startup and shutdown key is connected with a live wire, and the trigger end of the startup and shutdown key is connected with a live wire terminal of a startup and shutdown trigger circuit or the power supply, and the key point is that: a power switch control circuit is arranged between the startup and shutdown key and the power supply, the power switch control circuit comprises a single chip microcomputer connected with the trigger end of the startup and shutdown trigger circuit, a relay used for controlling the connection and disconnection of a live wire and a live wire terminal of the power supply, and a triode with a base electrode connected with the single chip microcomputer, and the relay and the triode are connected between the positive electrode of the 12V power supply and the ground end in series. The utility model integrates the on-off button and the power switch by designing the on-off control circuit, thus reducing the occupied space, and the host can be safely and reliably turned off, so that the appearance of the device is simpler and the cost is saved.

Description

Startup and shutdown control circuit for self-service equipment

Technical Field

The utility model belongs to the technical field of self-service equipment, and particularly relates to a startup and shutdown control circuit for self-service equipment.

Background

With the development of technology, the intellectualization and self-help of equipment become development trends. At present, the existing self-service equipment uses a power switch and a power on/off button, the application is complex, especially the smaller equipment space is limited, and the two buttons occupy larger volume. When the operation is improper and the power switch is not pressed down during shutdown, the whole computer is powered off, some data hosts are lost due to the fact that the power is not stored in time, and the mainboard can be damaged due to abnormal shutdown.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a power on/off control circuit for self-service equipment, wherein a power switch and a power on/off key are integrated on one power on/off key, and the power on/off of one key is realized through a matched circuit.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a switching on and shutting down control circuit for self-service equipment, includes switching on and shutting down button, power and the power control circuit who connects power and mainboard, the public end of switching on and shutting down button links to each other with the live wire, and the trigger end links to each other with the live wire wiring end of switching on and shutting down trigger circuit or power, and the key lies in: the power switch control circuit is arranged between the power switch key and the power supply and comprises a single chip microcomputer, a relay and a triode, wherein the single chip microcomputer is connected with a trigger end of the power switch trigger circuit, the relay is used for controlling the connection and disconnection of a live wire and a live wire terminal of the power supply, the base electrode of the triode is connected with the single chip microcomputer, and the relay and the triode are connected between the positive electrode of a 12V power supply and the ground end in series.

Furthermore, a diode connected with the relay in parallel is arranged between the negative electrode terminal of the relay and the positive electrode of the 12V power supply.

Furthermore, a first resistor is arranged between the single chip microcomputer and the base electrode of the triode.

Furthermore, a second resistor is arranged between the base electrode of the triode and the grounding end.

Furthermore, the power on/off trigger circuit comprises a third resistor and a photoelectric coupler which are connected in series between a zero line terminal of a power supply and a power on/off button, wherein a collector of the photoelectric coupler is connected with the single chip microcomputer and is connected with the anode of the 5V power supply by means of a fourth resistor, and the emitter is connected with a ground terminal.

Further, a level conversion chip for R232 communication is arranged between the single chip microcomputer and the mainboard.

Furthermore, the power on/off control circuit further comprises a super capacitor connected with the power supply control circuit.

The utility model has the beneficial effects that: 1. by designing the on-off control circuit, the on-off button and the power switch are integrated, so that the occupied space can be reduced, the host can be safely and reliably turned off, the appearance of the equipment is simpler, and the cost is saved; 2. the circuit and the mainboard can be communicated with each other, and the mainboard is controlled to be restarted, so that maintenance is reduced.

The present invention will be described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of the power on/off control circuit for a self-service device of the present invention;

FIG. 2 is a wiring diagram of the power switch control circuit and the power switch trigger circuit of the present invention;

FIG. 3 is a schematic diagram of the connection of the communication chip between the single chip microcomputer and the main board according to the present invention.

In the drawing, 1 is a main board, 2 is a power control circuit, 3 is a power supply, 4 is a super capacitor, S1 is an on/off button, K1 is a relay, Q1 is a triode, D1 is a diode, R1 is a first resistor, R2 is a second resistor, R3 is a third resistor, R4 is a fourth resistor, U0 is a single chip microcomputer, U1 is a photoelectric coupler, and U11 is a level conversion chip.

Detailed Description

Referring to fig. 1 and 2, the utility model provides a power on/off control circuit for self-service equipment, which comprises a power on/off key S1, a power supply 3 and a power control circuit 2 for connecting the power supply 3 and a main board 1, wherein a common end of the power on/off key S1 is connected with a live wire, and a trigger end is connected with a live wire terminal of the power on/off trigger circuit or the power supply 3, and the key point is that: a power switch control circuit is arranged between the on-off button S1 and the power supply 3, the power switch control circuit comprises a single chip microcomputer U0 connected with the trigger end of the on-off trigger circuit, a relay K1 used for controlling the connection and disconnection of a live wire and a live wire terminal of the power supply 3, and a triode Q1 of which the base electrode is connected with the single chip microcomputer U0, and the relay K1 and the triode Q1 are connected between the positive electrode and the ground end of a 12V power supply in series. The switch-off button S1 is a switch button having a self-lock in the present embodiment. The power control circuit 2 may be a related power control circuit in the existing design.

And a diode D1 connected with the relay K1 in parallel is arranged between the negative terminal of the relay K1 and the positive electrode of the 12V power supply to play a protection role. A first resistor R1 is arranged between the base electrodes of the single chip microcomputer U0 and the triode Q1, a second resistor R2 is arranged between the base electrode of the triode Q1 and the grounding end, and the first resistor R1 and the second resistor R2 are used for limiting current.

The on-off trigger circuit comprises a third resistor R3 and an anode and a cathode in a photoelectric coupler U1 which are connected in series between a zero line terminal of the power supply 3 and an on-off button S1, wherein the collector of the photoelectric coupler U1 is connected with the singlechip U0 and is connected with the anode of the 5V power supply by virtue of a fourth resistor R4, and the emitter is connected with the ground terminal. In the present embodiment, pc814 is used as the photocoupler U1. The third resistor R3 is used for limiting current, and the fourth resistor R4 plays a role of pulling up.

Referring to fig. 3, a level conversion chip U11 for R232 communication is disposed between the single chip microcomputer U0 and the main board 1. In this embodiment, the single chip microcomputer U0 employs STC12C5204AD, and the level shift chip U11 employs MAX 232.

The power on/off control circuit further comprises a super capacitor 4 connected with the power control circuit 2.

The control circuit of the utility model works in the following way.

In an initial state of non-startup, the startup and shutdown key S1 is not pressed, the photoelectric coupler U1 is in a conducting state, and the single chip microcomputer U0 detects a low level. After the power on/off key S1 is pressed, the photoelectric coupler U1 is not conducted with the single chip microcomputer U0, the detected high level is detected, then a signal is output through the Out1 to enable the triode Q1 to be conducted, the relay K1 is attracted to enable the normally open pin to be output to the power supply 3, the power supply 3 is powered on, and the mainboard 1 is powered on.

When the computer needs to be shut down, the on-off button S1 is pressed again to reset the computer, the photoelectric coupler U1 is in a conducting state at the moment, and the singlechip U0 detects that the high level is converted into the low level. After the single chip microcomputer U0 detects the change, the single chip microcomputer U0 sends an instruction POWEROFF to the mainboard 1 through a serial port (a level conversion chip U11) to prompt shutdown. After 3 seconds, the single chip microcomputer U0 enables the triode Q1 to be disconnected through output, the coil of the relay K1 is currentless, the normally open pin is disconnected, and the whole machine is powered off.

After the whole machine is powered off, the input of the power control circuit 2 is disconnected, and at the moment, the super capacitor still supplies power to the mainboard 1 through discharging, so that the buffer time of data stored in the mainboard 1 is shortened.

The singlechip U0 and the mainboard 1 communicate through RS232, regularly detect whether equipment normally operates, when the communication is interrupted due to various reasons, the equipment can be controlled to restart, general communication faults are solved by self, and people do not need to be sent for maintenance.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.

Claims

1. The utility model provides a switching on and shutting down control circuit for self-service equipment, includes switching on and shutting down button (S1), power (3) and power control circuit (2) of connecting power (3) and mainboard (1), the public end of switching on and shutting down button (S1) links to each other with the live wire, and the trigger end links to each other with the live wire terminal of switching on and shutting down trigger circuit or power (3), its characterized in that: switch button (S1) with be equipped with switch control circuit between power (3), switch control circuit include with switch trigger circuit' S trigger end continuous singlechip (U0), be used for controlling live wire and power (3) the live wire terminal be connected with relay (K1) and the base of disconnection with triode (Q1) that singlechip (U0) link to each other, relay (K1) with triode (Q1) establish ties between 12V power positive and ground terminal.

2. The on-off control circuit for a self-service device of claim 1, wherein: and a diode (D1) connected with the relay (K1) in parallel is arranged between the negative terminal of the relay (K1) and the positive electrode of the 12V power supply.

3. The on-off control circuit for a self-service device of claim 1, wherein: and a first resistor (R1) is arranged between the single chip microcomputer (U0) and the base electrode of the triode (Q1).

4. The power on/off control circuit for a self-service device of claim 1, wherein: and a second resistor (R2) is arranged between the base electrode of the triode (Q1) and the ground terminal.

5. The on-off control circuit for a self-service device of claim 1, wherein: the power on-off trigger circuit comprises a third resistor (R3) and a photoelectric coupler (U1) which are connected in series between a zero line terminal of a power supply (3) and a power on-off button (S1), wherein a collector of the photoelectric coupler (U1) is connected with a single chip microcomputer (U0) and is connected with the anode of a 5V power supply by means of a fourth resistor (R4), and a transmitter is connected with a ground terminal.

6. The on-off control circuit for a self-service device of claim 1, wherein: and a level conversion chip (U11) for R232 communication is arranged between the singlechip (U0) and the mainboard (1).

7. The power on/off control circuit for a self-service device of any one of claims 1-6, wherein: the power on/off control circuit also comprises a super capacitor (4) connected with the power supply control circuit (2).