CN107546716A - A kind of automatic vending machine intermittent duty power apparatus protection circuit - Google Patents
A kind of automatic vending machine intermittent duty power apparatus protection circuit Download PDFInfo
- Publication number
- CN107546716A CN107546716A CN201610489666.7A CN201610489666A CN107546716A CN 107546716 A CN107546716 A CN 107546716A CN 201610489666 A CN201610489666 A CN 201610489666A CN 107546716 A CN107546716 A CN 107546716A
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- circuit
- signal
- vending machine
- automatic vending
- protection circuit
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Abstract
The invention provides a kind of automatic vending machine intermittent duty power apparatus protection circuit, including：One external control signal circuit, a protection circuit, a signal buffer circuit, an automatic vending machine internal power equipment；The input of protection circuit is connected with external control signal circuit output end, for detecting the control signal of external control signal circuit, and the signal is identified and judged with time-out；Output end of the signal buffer circuit input respectively with external control signal circuit and protection circuit connects; output end is connected with the input of automatic vending machine internal power equipment; signal buffer circuit is by the signal of general protective circuit and the signal logic of external control signal circuit; output is to automatic vending machine internal power equipment after logical combination judgement is carried out to signal, to control the operation for needing power apparatus to be protected.Circuit provided by the invention has reliable and stable, simple and practical effect, and can play good protecting effect.
Description
Technical field
The present invention relates to automatic vending machine field, more particularly to a kind of automatic vending machine intermittent duty power apparatus protection electricity
Road.
Background technology
At present, being continuously increased with China's automatic vending machine, facilitating the common people, improving efficiency of service, actively sell goods
While market, the maintenance of automatic vending machine is also as one of work of each enterprise, to prevent due to automatic vending machine failure, to visitor
Bring unnecessary trouble in family.
It is existing, the operation maintenance of automatic vending machine, controlled mostly using software, once software is out of control, equipment is for a long time
Energization is possible to cause apparatus overheat to burn.So as to cause the loss of enterprise and client.
The content of the invention
It is an object of the invention to provide a kind of automatic vending machine intermittent duty power apparatus protection circuit, by using list
Steady-state circuit protects the commutator equipment inside automatic vending machine, to avoid automatic vending machine overheat from burning.
The purpose of the present invention is achieved through the following technical solutions.
A kind of automatic vending machine intermittent duty power apparatus protection circuit, including：One external control signal circuit, a protection
Circuit, a signal buffer circuit, an automatic vending machine internal power equipment；
The input of protection circuit is connected with external control signal circuit output end, for detecting external control signal circuit
Control signal, and the signal is identified and time-out judge；
Output end of the signal buffer circuit input respectively with external control signal circuit and protection circuit connects, output end
It is connected with the input of automatic vending machine internal power equipment, signal and outside of the signal buffer circuit by general protective circuit
The signal logic of control signal circuit, output is next to automatic vending machine internal power equipment after logical combination judgement is carried out to signal
Control needs the operation of power apparatus to be protected.
Preferably, the external control signal circuit is made up of the first integrated chip (U1A) and resistance R1, its output end warp
Overmatching resistance R1 is connected to protection circuit, for producing the switching drive signal of control power apparatus.
Preferably, first integrated chip (U1A) is MCU, digital signal processor or FPGA.
Preferably, the protection circuit is made up of the second integrated chip (U2A), resistance R2, resistance R3, electric capacity C1, and second
The input of integrated chip (U2A) adjusts the time span or time window width of triggering by electric capacity C1 and resistance R2, its
Output end electrically connects through resistance R3 with signal buffer circuit.
Preferably, the protection circuit also includes a reverser (U4A), and its one end is connected with resistance R3, another termination letter
Number buffer circuit.
Preferably, second integrated chip (U2A) is an integrated monostable circuit element.
Preferably, the signal buffer circuit is made up of a logical device (U5B), resistance R4, and the of logical device (U5B)
One input is connected with the output end of reverser (U4A), and its second input is connected with resistance R1 one end, logical device
(U5B) output end connects automatic vending machine internal power equipment.
Preferably, the automatic vending machine internal power equipment include a power drive element (U6) be used for drive high current or
The high-tension power apparatus of person (M1).
The embodiment of the present invention compared with prior art, protect by automatic vending machine intermittent duty power apparatus provided by the invention
Circuit, the commutator equipment inside automatic vending machine is protected by using monostable circuit, guard time window is adjustable, protection
Time can automatically reset later, be burnt out to prevent electromagnet commutator.With reliable and stable, simple and practical effect, and can play
Good protecting effect.
Brief description of the drawings
Fig. 1 is automatic vending machine intermittent duty power apparatus protection circuit theory diagram of the present invention；
Fig. 2 is automatic vending machine intermittent duty power apparatus protection circuit schematic diagram of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Automatic vending machine intermittent duty power apparatus protection circuit of the present invention shown in Fig. 1 is referred to, including：One outside controls
Signal circuit 1, a protection circuit 2, a signal buffer circuit 3, an automatic vending machine internal power equipment 4.
The input of protection circuit 2 is connected with the output end of external control signal circuit 1, for detecting external control signal electricity
The control signal on road 1, and the signal is identified and judged with time-out.
Output end of the input of signal buffer circuit 3 respectively with external control signal circuit 1 and protection circuit 2 connects, defeated
Go out end with the input of the internal power equipment of automatic vending machine 4 to be connected, signal buffer circuit 3 passes through the letter of general protective circuit 2
Number and external control signal circuit 1 signal logic, output is to automatic vending machine internal strength after logical combination judgement is carried out to signal
Rate equipment, to control the operation for needing power apparatus to be protected.
It is when software is out of control or other reasonses cause external control signal circuit that unexpected control signal occurs, i.e., outer
When portion's control signal circuit 1 breaks down, protection circuit 2 carries out overtime detection to the continuous effective state of signal, once the time
After time window more than its setting, protection circuit 2 sends disable signal to signal buffer circuit 3, signal buffer circuit 3 and received
To after the disable signal of protection circuit 2, signal is sent to automatic vending machine internal power equipment, automatic vending after carrying out logic synthesis
It is out of service after machine internal power equipment receives the stopping signal of signal buffer circuit 3, long-play burning apparatus is prevented,
Carry out the purpose and effect for reaching protection.
As shown in fig.2, U1A is external signal control circuit, for producing the switching drive signal of control power apparatus,
UIA can be that chip or device, its output signal such as MCU, digital signal processor (DSP), FPGA pass through build-out resistor R1
U2A and U5B input are connected to, U2A is an integrated monostable circuit element, can be adjusted by electric capacity C1 and resistance R2 tactile
The time span or time window width of hair, it, which is exported, carrys out matched-phase by the reverser U4A (optional) of R3 connections one and patrols
Volume, signal is delivered to signal buffer circuit, signal buffer circuit U5B is the control signal sent by U1A, and passes through U2A processing
Signal carry out logical process after deliver to U6, U6 is a power drive element, for driving high current or high-tension power
Equipment M1.In addition by the adjustment of C1 and R2 time constant, the time span and window of protection circuit can be adjusted, to adapt to
Different demands for control.After design time constant of the control signal effective time length more than U 2A as caused by U1A,
U2A can produce a signal with the U1A control signal opposite logics occurred, can make driving by the output of U5B logical "and"s for one
The level of control terminal " forbidding enabling ", and then its driving is closed, power apparatus is effectively protected, prevents its long-play
Equipment is caused to damage.
For some power apparatus in automatic vending machine, apparatus overheat can be caused to burn because it is continuously long-running
Ruin, therefore after software control is out of control, it may appear that running status is powered continuously, then causes equipment long-play overheat to be burnt
Ruin, the present invention is monitored and controlled to control signal by a single-shot trigger circuit, once when run time exceedes expected
Between after length, during control circuit can cutting-off controlling signal, equipment is entered run-stopping status, and then be effectively protected and set
It is standby, maintenance cost is reduced, avoids property loss.Accordingly, the time window of control circuit can in the technical scheme of invention
Adjust, be adapted to the demand for control with different time length, it is applied widely, and time control span is big.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (8)
- A kind of 1. automatic vending machine intermittent duty power apparatus protection circuit, it is characterised in that including：One external control signal electricity Road, a protection circuit, a signal buffer circuit, an automatic vending machine internal power equipment；The input of protection circuit is controlled with outside Signal circuit output end processed connection, for detecting the control signal of external control signal circuit, and the signal is identified and Time-out judges；Output end of the signal buffer circuit input respectively with external control signal circuit and protection circuit connects, output End be connected with the input of automatic vending machine internal power equipment, signal buffer circuit by general protective circuit signal and outside The signal logic of portion's control signal circuit, exported after logical combination judgement is carried out to signal to automatic vending machine internal power equipment, To control the operation for needing power apparatus to be protected.
- 2. automatic vending machine intermittent duty power apparatus protection circuit as claimed in claim 1, it is characterised in that the outside Control signal circuit is made up of the first integrated chip (U1A) and resistance R1, and its output end is connected to protection by build-out resistor R1 Circuit, for producing the switching drive signal of control power apparatus.
- 3. automatic vending machine intermittent duty power apparatus protection circuit as claimed in claim 2, it is characterised in that described first Integrated chip (U1A) is MCU, digital signal processor or FPGA.
- 4. automatic vending machine intermittent duty power apparatus protection circuit as claimed in claim 2, it is characterised in that the protection Circuit is made up of the second integrated chip (U2A), resistance R2, resistance R3, electric capacity C1, and the input of the second integrated chip (U2A) leads to The time span or time window width of electric capacity C1 and resistance R2 adjustment triggerings are crossed, its output end buffers through resistance R3 and signal Circuit electrically connects.
- 5. automatic vending machine intermittent duty power apparatus protection circuit as claimed in claim 4, it is characterised in that the protection Circuit also includes a reverser (U4A), and its one end is connected with resistance R3, another termination signal buffer circuit.
- 6. the automatic vending machine intermittent duty power apparatus protection circuit as described in claim 4 or 5, it is characterised in that described Second integrated chip (U2A) is an integrated monostable circuit element.
- 7. the automatic vending machine intermittent duty power apparatus protection circuit as described in claim 4 or 5, it is characterised in that described Signal buffer circuit is made up of a logical device (U5B), resistance R4, the first input end and reverser of logical device (U5B) (U4A) output end is connected, and its second input is connected with resistance R1 one end, and the output end of logical device (U5B) is connected to dynamic Vending machine internal power equipment.
- 8. automatic vending machine intermittent duty power apparatus protection circuit as claimed in claim 7, it is characterised in that described automatic Vending machine internal power equipment includes a power drive element (U6) and is used to drive high current or high-tension power apparatus (M1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489666.7A CN107546716A (en) | 2016-06-29 | 2016-06-29 | A kind of automatic vending machine intermittent duty power apparatus protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610489666.7A CN107546716A (en) | 2016-06-29 | 2016-06-29 | A kind of automatic vending machine intermittent duty power apparatus protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107546716A true CN107546716A (en) | 2018-01-05 |
Family
ID=60962974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610489666.7A Pending CN107546716A (en) | 2016-06-29 | 2016-06-29 | A kind of automatic vending machine intermittent duty power apparatus protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107546716A (en) |
-
2016
- 2016-06-29 CN CN201610489666.7A patent/CN107546716A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |