CN206060723U - Communicating circuit between AGV circuit boards - Google Patents
Communicating circuit between AGV circuit boards Download PDFInfo
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- CN206060723U CN206060723U CN201620936503.4U CN201620936503U CN206060723U CN 206060723 U CN206060723 U CN 206060723U CN 201620936503 U CN201620936503 U CN 201620936503U CN 206060723 U CN206060723 U CN 206060723U
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- resistance
- photoelectrical coupler
- agv
- circuit
- phototriode
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Abstract
This utility model provides the communicating circuit between AGV circuit boards, including switch element, resistance R1, resistance R2, photoelectrical coupler, diode, stabilivolt and resistance R3, one end of switch element is connected with the anode of the light emitting diode of photoelectrical coupler, its other end is connected with the first power voltage terminal, and switch element is connected with signal input part by resistance R1, the negative electrode of the light emitting diode of photoelectrical coupler is connected with earth terminal by resistance R2；After R3 concatenation stabilivolts, one end is connected with second source voltage end, the other end is connected with the emitter stage of the phototriode of photoelectrical coupler, the anode of diode is connected with the emitter stage of the phototriode of photoelectrical coupler, the other end is connected with earth terminal, the base stage of the phototriode of photoelectrical coupler is connected with second source voltage end, and the colelctor electrode of the phototriode of photoelectrical coupler is connected with signal output part.Protect the MCU of two circuit boards to communicating.
Description
Technical field
This utility model is related to AGV telecommunication circuits field, especially the communicating circuit between AGV circuit boards.
Background technology
In AGV body control systems, it is often necessary to increase expansion board to existing system board, and due to system board
With newly-increased expansion board, there is the load of 24V (or 12V), therefore, system board and expansion board have the power circuit of 24V.
Further, since AGV is motion, during traveling, if the ground contact of system board and expansion board is not
When good, system board or expansion board will entire plate the voltage of 24V is presented so that the communication of system board or expansion board
High pressure of the outfan for 24V, this magnitude of voltage is significantly larger than the pressure voltage of MCU, if now two pieces of circuit boards are communicated,
The MCU of the good circuit board of ground contact will be burned moment.Accordingly, it would be desirable to design a kind of telecommunication circuit for protection with two
Block communication board.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of simple structure, safely and effectively AGV
Communicating circuit between circuit board.
In order to achieve the above object, this utility model is employed the following technical solutions：
Communicating circuit between AGV circuit boards, including switch element, resistance R1, resistance R2, photoelectrical coupler, diode,
Stabilivolt and resistance R3, above-mentioned diode preferably use Schottky diode, one end of the switch element and the photoelectricity
The anode connection of the light emitting diode of bonder, its other end is connected with the first power voltage terminal, and the switch element is logical
Cross the resistance R1 to be connected with signal input part, the negative electrode of the light emitting diode of the photoelectrical coupler is by resistance R2 and ground connection
End connection, by control signal input output pulse signal, makes the switching elements conductive or cut-off, so that photoelectric coupling
Device on or off；After R3 concatenation stabilivolt, one end is connected with second source voltage end, the other end and photoelectrical coupler
The emitter stage connection of phototriode, the anode of the Schottky diode are sent out with the phototriode of the photoelectrical coupler
Emitter-base bandgap grading connects, and the other end is connected with earth terminal, base stage and the second source voltage end of the phototriode of the photoelectrical coupler
Connection, the colelctor electrode of the phototriode of the photoelectrical coupler are connected with signal output part.
Compared with prior art, the simply effective communicating circuit of this utility model, makes two circuit boards electric at any one piece
When the ground wire connection of road plate is abnormal, the MCU of another piece of circuit board will not be made breakdown because of too high common-mode voltage, effectively
The safe handling for protecting circuit board, increased the service life of circuit board, reduce the maintenance rate of AGV.
Preferably, the switch element is transistor, and the base stage of the transistor is by the resistance R1 and signal input
End connection, the emitter stage of transistor is connected with the first power voltage terminal, the colelctor electrode of the transistor and the photoelectrical coupler
Light emitting diode anode connection.
Preferably, the resistance of the resistance R1 and resistance R2 is 0.6-1.5K Ω, and the resistance of resistance R3 is 110-150 Ω,
The voltage stabilizing value of described stabilivolt is 15-18V.
Preferably, the transistor is PNP transistor.
Preferably, first supply voltage and second source voltage are 4.5-5.5V.
Description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Specific embodiment
Referring to Fig. 1, the communicating circuit between AGV circuit boards, including switch element, resistance R1, resistance R2, photoelectrical coupler
U1, diode, stabilivolt Z1 and resistance R3, above-mentioned diode preferably use Schottky diode D1, the switch element
One end is connected with the anode 1 of the light emitting diode of the photoelectrical coupler, and its other end is connected with the first power voltage terminal 20, and
And the switch element is connected with signal input part 10 by the resistance R1, the light emitting diode of the photoelectrical coupler U1
Negative electrode 2 is connected with earth terminal 30 by resistance R2, by 10 input pulse signal of input, make the switching elements conductive or
Cut-off, so that photoelectrical coupler U1 on or off；
After the R3 concatenations stabilivolt Z1, one end is connected with second source voltage end 50, and the other end is with photoelectrical coupler U1's
The emitter stage 5 of phototriode connects, photosensitive three pole of the anode of the Schottky diode D1 and the photoelectrical coupler U1
The emitter stage 5 of pipe connects, and the other end is connected with earth terminal 30, the base stage 6 of the phototriode of the photoelectrical coupler U1 and
Two power voltage terminals 50 connect, and the colelctor electrode 4 of the phototriode of the photoelectrical coupler U1 is connected with signal output part 40.
Used as a kind of preferred scheme, above-mentioned switch element is transistor Q1, and the base stage of the transistor Q1 is by institute
State resistance R1 to be connected with signal input part 10, the emitter stage of transistor Q1 is connected with 20 end of the first supply voltage, the transistor
The colelctor electrode of Q1 is connected with the anode 1 of the light emitting diode of the photoelectrical coupler U1, and transistor Q1 is preferably positive-negative-positive crystal
Pipe.
Used as a kind of preferred scheme, the resistance of above-mentioned resistance R1 and resistance R2 is 0.6-1.5K Ω, is preferably provided with
For 1K Ω, the resistance of resistance R3 is 110-150K Ω, is preferably arranged to 120 Ω, and the voltage stabilizing value of above-mentioned stabilivolt is 15-
18V, is preferably arranged to 16V.
It should be noted that the first above-mentioned power voltage terminal 20 and second source voltage end 50 are to be separately positioned on difference
Circuit board on, supply voltage of first power voltage terminal 20 for the circuit board of output pulse signal, second source voltage end
50 is the preferred of the supply voltage of the circuit board for receiving signal, the first above-mentioned power voltage terminal 20 and second source voltage end 50
Voltage is 5V.
Operation principle of the present utility model is as follows：
When one piece of circuit board is to another piece of circuit board output pulse signal, transistor Q1 will be low in pulse signal
It is switched on when level, photoelectrical coupler U1 is turned on by the 5V supply voltages for being applied to emitter, photoelectrical coupler
The phototriode output of U1 is effective, and between colelctor electrode, emitter stage, voltage is that (i.e. 4 ends, the voltage difference between 5 ends is 0.1V
0.1V), and the PN junction of Schottky diode D1 pressure drop be 0.3V so that the Voltage Cortrol of signal output part 40 is
Therefore 0.4V, the circuit board of return pulse signal also can recognize that the pulse signal is low electricity.Therefore this circuit input low level
When, output is also low level；
And when the pulse signal of input is high level, transistor Q1 will not be switched on, the input of photoelectrical coupler U1
End can also be in the state of closure, and now the phototriode of photoelectrical coupler U1 is not turned on yet, but in second source electricity
Under the power supply of pressure side 50, voltage can be pulled up by R11, be rendered as high level.Therefore, during this circuit input high level, output is also
High level.
Operation principle of the present utility model is as follows：
When the circuit board of input pulse signal, when there is ground wire connection exception, signal input part 10, the first power voltage terminal
20 and earth terminal 30 be rendered as the voltage of 24V, therefore, if unprotected device in circuit, electric current has from earth terminal 30
Jing signal output parts 40 enter the circuit board for receiving signal, so that the MCU for receiving the circuit board of signal is damaged, but due to this
Schottky diode D1 is provided with primary Ioops, Schottky diode D1 has completely cut off the backward current of this primary Ioops, is protected well
The circuit board for receiving signal is protected；And when the circuit board of signal is received, when there is ground wire connection exception, signal output part 40,
Second source voltage 50 and 30 end of earth terminal are presented the voltage of 24V, therefore, if unprotected device, electric current in circuit
Have from earth terminal 30, resistance R2, photoelectrical coupler U1 and transistor Q1 again on the circuit board of output pulse signal, but due to
Transistor Q1 is provided with this loop, transistor Q1 has completely cut off the backward current of this primary Ioops, electric current does not flow into output pulse
On the circuit board of signal, so as to play a very good protection.
Compared with prior art, the simply effective communicating circuit of this utility model, makes two circuit boards electric at any one piece
When the ground wire connection of road plate is abnormal, the MCU of another piece of circuit board will not be made breakdown because of too high common-mode voltage, effectively
The safe handling for protecting circuit board, increased the service life of circuit board, reduce the maintenance rate of AGV.
The announcement and teaching of book according to the above description, this utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is changed.Therefore, this utility model is not limited to specific embodiment disclosed and described above, right
Some modifications and changes of the present utility model should also be as falling in scope of the claims of the present utility model.Additionally, to the greatest extent
Some specific terms used in pipe this specification, but these terms are merely for convenience of description, not to this utility model
Constitute any restriction.
Claims (5)
- Communicating circuit between 1.AGV circuit boards, it is characterised in that：Including switch element, resistance R1, resistance R2, photoelectric coupling Device, diode, stabilivolt and resistance R3, the anode of one end of the switch element and the light emitting diode of the photoelectrical coupler Connection, its other end are connected with the first power voltage terminal, and the switch element passes through the resistance R1 and signal input part Connection, the negative electrode of the light emitting diode of the photoelectrical coupler is connected with earth terminal by resistance R2, by exporting to input Pulse signal, makes the switching elements conductive or cut-off to control the on or off of photoelectrical coupler；After the R3 concatenations stabilivolt, one end is connected with second source voltage end, the phototriode of the other end and photoelectrical coupler Emitter stage connection, the anode of the diode is connected with the emitter stage of the phototriode of the photoelectrical coupler, the other end It is connected with earth terminal, the base stage of the phototriode of the photoelectrical coupler is connected with second source voltage end, the smooth thermocouple The colelctor electrode of the phototriode of clutch is connected with signal output part.
- 2. the communicating circuit between AGV circuit boards according to claim 1, it is characterised in that：The switch element is crystalline substance Body pipe, the base stage of the transistor are connected with signal input part by the resistance R1, the emitter stage of transistor and the first power supply Voltage end connects, and the colelctor electrode of the transistor is connected with the anode of the light emitting diode of the photoelectrical coupler.
- 3. the communicating circuit between AGV circuit boards according to claim 1, it is characterised in that：The resistance R1 and resistance The resistance of R2 is 0.6-1.5K Ω, and the resistance of resistance R3 is 110-150 Ω, and the voltage stabilizing value of described stabilivolt is 15-18V.
- 4. the communicating circuit between AGV circuit boards according to claim 2, it is characterised in that：The transistor is positive-negative-positive Transistor.
- 5. the communicating circuit between AGV circuit boards according to claim 1, it is characterised in that：First supply voltage 4.5-5.5V is with second source voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620936503.4U CN206060723U (en) | 2016-08-25 | 2016-08-25 | Communicating circuit between AGV circuit boards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620936503.4U CN206060723U (en) | 2016-08-25 | 2016-08-25 | Communicating circuit between AGV circuit boards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206060723U true CN206060723U (en) | 2017-03-29 |
Family
ID=58385329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620936503.4U Active CN206060723U (en) | 2016-08-25 | 2016-08-25 | Communicating circuit between AGV circuit boards |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206060723U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464169A (en) * | 2020-04-13 | 2020-07-28 | 厦门厦华科技有限公司 | Logic power supply switch control circuit |
-
2016
- 2016-08-25 CN CN201620936503.4U patent/CN206060723U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464169A (en) * | 2020-04-13 | 2020-07-28 | 厦门厦华科技有限公司 | Logic power supply switch control circuit |
| CN111464169B (en) * | 2020-04-13 | 2024-05-24 | 厦门厦华科技有限公司 | Logic power supply switch control circuit |
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