CN104980143B - Triggering interlock circuit based on operational amplifier - Google Patents
Triggering interlock circuit based on operational amplifier Download PDFInfo
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- CN104980143B CN104980143B CN201510367171.2A CN201510367171A CN104980143B CN 104980143 B CN104980143 B CN 104980143B CN 201510367171 A CN201510367171 A CN 201510367171A CN 104980143 B CN104980143 B CN 104980143B
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- resistance
- operational amplifier
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Abstract
The invention discloses a kind of triggering interlock circuit based on operational amplifier, the triggering interlock circuit is made of trigger element, interlocking unit and comparing unit.It is triggered using photoelectrical coupler, realizes the electrical isolation between trigger signal and interlock circuit, interlocked and compared using operational amplifier.The present invention realizes the triggering interlock circuit of basic operation amplifier using simplified design and minimum component, cost can be reduced, while improving reliability, it realizes the electrical isolation between trigger signal and interlock circuit, has the characteristics that performance is stable, reliability is high, cost-effective, strong environmental adaptability.
Description
Technical field
The present invention relates to a kind of interlock circuit, specifically, being related to a kind of triggering interlock circuit based on operational amplifier.
Background technology
At present, triggering interlock circuit relies primarily on transistor, trigger or microcontroller（CPU）To realize.Transistor forms
Triggering interlock circuit, cost is relatively low, but temperature drift is larger, and reliability is low；Trigger or microcontroller（CPU）The triggering of composition
Interlock circuit, temperature drift is small, and reliability is high, but cost is higher.
Invention content
The present invention is precisely in order to solving above-mentioned technical problem and designing and interlock electricity with a kind of triggering based on operational amplifier
Road.
The technical solution adopted by the present invention to solve the technical problems is：A kind of triggering interlocking electricity based on operational amplifier
Road is made of trigger element, interlocking unit and comparing unit.Its trigger element is by photoelectrical coupler U1, U2 and resistance R1, R2 group
Into resistance R14, R15 are biasing resistor, open trigger signal and shutdown trigger signal couples respectively through photoelectrical coupler U1 and U2
Export to the inverting input of operational amplifier U3-1 of interlocking unit and the in-phase input end of U3-3, realize trigger signal with mutually
Electrical isolation between lock circuit；Interlocking unit is by 11 resistance, 2 ceramic condensers, 2 operational amplifiers and 4 diode groups
Into, realize interlocking by opening trigger signal and shutdown trigger signal triggering operational amplifier U3-1 and U3-3, by resistance R2 and
R6 partial pressures provide reference voltage for U3-1 in-phase input ends, are divided by resistance R11 and R12 and provide base for U3-3 inverting inputs
Quasi- voltage；Potential-divider network is formed by resistance R1 and R5 with U3-1 inverting inputs to be connected, and is made up of resistance R8, R9 and R10
Potential-divider network is connected with U3-3 in-phase input ends；Resistance R3, R7 are respectively the positive feedback resistor of operational amplifier U3-1 and U3-3,
Capacitance C1, C3 are respectively the startup zero setting capacitance of operational amplifier U3-1 and U3-3；Diode D1, D2, D3, D4 are two pole of logic
Pipe, diode D1, D2 anode are connected with U3-1 output terminals, and diode D2 cathode pass through resistance R8 and U3-3 in-phase input end phases
Even, diode D3 anodes are connected with U3-1 in-phase input ends, and diode D3, D4 cathode are connected with U3-3 output terminals, diode D1
Cathode is connected by resistance R13 with U3-2 in-phase input ends, and diode D4 anodes are connected with U3-2 in-phase input ends；Comparing unit
It is made of 4 resistance, 1 ceramic condenser and 1 operational amplifier, being compared output interlocking by operational amplifier U3-2 believes
Number, provide reference voltage for U3-2 inverting inputs by resistance R4 and R17 partial pressure, resistance R13 and R16 group potential-divider network and
U3-2 in-phase input ends are connected, and capacitance C2 is the startup zero setting capacitance of U3-2.
The triggering interlock circuit based on operational amplifier, photoelectrical coupler U1, U2 model TLP291, operation are put
Big device U3 models LM324.
The present invention operation principle be：When opening trigger signal as high level, operation is put in photoelectrical coupler U1 actions
The inverting input voltage pull-down of big device U3-1, makes the high level that operational amplifier U3-1 is exported pass through diode D1 and resistance
R13 is connected to the in-phase input end of operational amplifier U3-2, then is compared with the voltage of operational amplifier U3-2 inverting inputs
After relatively, operational amplifier U3-2 output high level.Meanwhile the high level of operational amplifier U3-1 outputs, pass through resistance R3 all the way
The in-phase input end of operational amplifier U3-1 is fed back to, increases homophase input terminal voltage, keeps operational amplifier U3-1 high electricity
Flat output, realizes self-locking；Another way is connected to the in-phase input end of operational amplifier U3-3 by diode D2 and resistance R8, makes
The homophase input terminal voltage raising of operational amplifier U3-3, exports high level, and the high level of operational amplifier U3-3 outputs passes through again
Resistance R7 feeds back to the in-phase input end of operational amplifier U3-3, keeps operational amplifier U3-3 high level outputs, realizes interlocking.
At this point, opening trigger signal either low level, high level or hanging, operational amplifier U3-2 remains high level output.
When it is high level to turn off trigger signal, photoelectrical coupler U2 actions, by the homophase input of operational amplifier U3-3
Terminal voltage drags down, and the low level that operational amplifier U3-3 is exported is made to pass through the same phase that diode D4 is connected to operational amplifier U3-2
Input terminal, then after being compared with the voltage of operational amplifier U3-2 inverting inputs, operational amplifier U3-2 output low levels.
Meanwhile the low level of operational amplifier U3-3 outputs, the homophase input of operational amplifier U3-3 is fed back to by resistance R7 all the way
End makes the reduction of in-phase input end voltage, keeps operational amplifier U3-3 output low levels, realizes self-locking；Another way passes through two poles
Pipe D3 is connected to the in-phase input end of operational amplifier U3-1, makes the in-phase input end voltage of operational amplifier U3-1 reduce, defeated
Go out low level, the low level of operational amplifier U3-1 outputs feeds back to the homophase input of operational amplifier U3-1 through resistance R3 again
End keeps operational amplifier U3-1 low level outputs, realizes interlocking.At this point, shutdown trigger signal either low level, high level
Or it is hanging, operational amplifier U3-2 remains low level output.
Touching for basic operation amplifier is realized the beneficial effects of the invention are as follows simplified design and minimum component is used
Interlock circuit is sent out, cost can be reduced, while improving reliability, realizes the electrical isolation between trigger signal and interlock circuit.
Description of the drawings
Fig. 1 is schematic block circuit diagram of the present invention.
Fig. 2 is circuit diagram of the present invention.
Fig. 3 is present example circuit diagram.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As illustrated in fig. 1 and 2, a kind of triggering interlock circuit based on operational amplifier of the present invention, it is single by trigger element, interlocking
Member and comparing unit composition.Its trigger element is made of photoelectrical coupler U1, U2 and resistance R1, R2, and resistance R14, R15 are biasing
Resistance opens trigger signal and turns off operation of the trigger signal respectively through photoelectrical coupler U1 and U2 coupling output to interlocking unit
The inverting input of amplifier U3-1 and the in-phase input end of U3-3 realize the electrical isolation between trigger signal and interlock circuit；
Interlocking unit is made of 11 resistance, 2 ceramic condensers, 2 operational amplifiers and 4 diodes, by open trigger signal and
It turns off trigger signal triggering operational amplifier U3-1 and U3-3 and realizes interlocking, be U3-1 homophase inputs by resistance R2 and R6 partial pressure
End provides reference voltage, is divided by resistance R11 and R12 and provides reference voltage for U3-3 inverting inputs；By resistance R1 and
R5 forms potential-divider network and is connected with U3-1 inverting inputs, and potential-divider network is formed with U3-3 with mutually defeated by resistance R8, R9 and R10
Enter end to be connected；Resistance R3, R7 are respectively the positive feedback resistor of operational amplifier U3-1 and U3-3, and capacitance C1, C3 are respectively operation
The startup zero setting capacitance of amplifier U3-1 and U3-3；Diode D1, D2, D3, D4 be logic diode, diode D1, D2 anode
It is connected with U3-1 output terminals, diode D2 cathode are connected by resistance R8 with U3-3 in-phase input ends, diode D3 anodes and U3-
1 in-phase input end is connected, and diode D3, D4 cathode are connected with U3-3 output terminals, and diode D1 cathode pass through resistance R13 and U3-2
In-phase input end is connected, and diode D4 anodes are connected with U3-2 in-phase input ends；Comparing unit is by 4 resistance, 1 ceramic condenser
It is formed with 1 operational amplifier, output interlocking signal is compared by operational amplifier U3-2, divided by resistance R4 and R17
It presses and provides reference voltage for U3-2 inverting inputs, resistance R13 and R16 group potential-divider network is connected with U3-2 in-phase input ends, electricity
Hold the startup zero setting capacitance that C2 is U3-2.
As shown in figure 3, the triggering interlock circuit based on operational amplifier is by trigger element, interlocking unit and comparison list
Member composition.Wherein photoelectrical coupler U1 and U2 is TPL291, and resistance R14, R15 are 390 Ω；Operational amplifier U3 is integrated 4 fortune
Amplifier LM324 is calculated, resistance R1, R2, R3, R5, R6, R7, R8, R9, R10, R11 and R12 are 10K Ω, and capacitance C1, C3 are
105, diode D1, D2, D3, D4 BAS21；Resistance R4 is 10K Ω, and R13 is 5.1K Ω, and resistance R16 and R17 are 20K Ω, electric
It is 105 to hold C2.
The present invention is not limited to above-mentioned preferred forms, anyone the present invention enlightenment under obtain other it is any with
Product as the present invention is same or similar, is within the scope of the present invention.
Claims (1)
1. a kind of triggering interlock circuit based on operational amplifier, is made of trigger element, interlocking unit and comparing unit；It is special
Sign is：Trigger element is made of photoelectrical coupler U1, U2 and resistance R14, R15, and resistance R14, R15 are biasing resistor, open-minded
Trigger signal and shutdown trigger signal are respectively through photoelectrical coupler U1 and U2 coupling output to the operational amplifier U3- of interlocking unit
1 inverting input and the in-phase input end of U3-3 realize the electrical isolation between trigger signal and interlock circuit；Interlocking unit by
11 resistance, 2 ceramic condensers, 2 operational amplifiers and 4 diode compositions, by opening trigger signal and shutdown triggering letter
Number triggering operational amplifier U3-1 and U3-3 realizes interlocking, after being divided by resistance R2 and R6 to supply voltage Vcc with U3-
1 in-phase input end is connected, and reference voltage is provided for U3-1 in-phase input ends；By resistance R11 and R12 to supply voltage Vcc into
It is connected after row partial pressure with U3-3 inverting inputs, reference voltage is provided for U3-3 inverting inputs；By resistance R1 and R5 to supplying
Piezoelectric voltage Vcc is connected after being divided with U3-1 inverting inputs, and supply voltage Vcc is divided by resistance R9 and R10
It is connected afterwards with U3-3 in-phase input ends；Resistance R3, R7 are respectively the positive feedback resistor of operational amplifier U3-1 and U3-3, capacitance
C1 be U3-1 in-phase input ends over the ground between be connected capacitance, as U3-1 start zero setting capacitance；
Capacitance C3 be U3-3 inverting inputs over the ground between be connected capacitance, as U3-3 start zero setting capacitance；Diode D1,
D2, D3, D4 are logic diode, and diode D1, D2 anode is connected with U3-1 output terminals, diode D2 cathode by resistance R8 and
U3-3 in-phase input ends are connected, and diode D3 anodes are connected with U3-1 in-phase input ends, and diode D3, D4 cathode and U3-3 are exported
End is connected, and diode D1 cathode are connected by resistance R13 with U3-2 in-phase input ends, diode D4 anodes and U3-2 homophase inputs
End is connected；Comparing unit is made of 4 resistance, 1 ceramic condenser and 1 operational amplifier, by operational amplifier U3-2 into
Row relatively output interlocking signal, after being divided by resistance R4 and R17 to supply voltage Vcc with U3-2 inverting input phases
Even, reference voltage is provided for U3-2 inverting inputs, by resistance R13 and R16 to after the voltage of diode D1 divides
Be connected with U3-2 in-phase input ends, capacitance C2 be U3-2 in-phase input ends over the ground between be connected capacitance；
Photoelectrical coupler U1, U2 model TLP291, operational amplifier U3 models LM324.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510367171.2A CN104980143B (en) | 2015-06-29 | 2015-06-29 | Triggering interlock circuit based on operational amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510367171.2A CN104980143B (en) | 2015-06-29 | 2015-06-29 | Triggering interlock circuit based on operational amplifier |
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| Publication Number | Publication Date |
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| CN104980143A CN104980143A (en) | 2015-10-14 |
| CN104980143B true CN104980143B (en) | 2018-06-08 |
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| CN201510367171.2A Active CN104980143B (en) | 2015-06-29 | 2015-06-29 | Triggering interlock circuit based on operational amplifier |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5986255A (en) * | 1996-06-12 | 1999-11-16 | Schneider Electric Sa | Photoelectric cell with lockable differential processing |
| CN201557093U (en) * | 2009-12-08 | 2010-08-18 | 佛山市顺德区和而泰电子科技有限公司 | Electronic self-locking circuit and device |
| CN101814726A (en) * | 2010-04-14 | 2010-08-25 | 罗康林 | Battery discharge prevention circuit |
| CN204597927U (en) * | 2015-06-29 | 2015-08-26 | 航天长峰朝阳电源有限公司 | Based on the triggering interlock circuit of operational amplifier |
-
2015
- 2015-06-29 CN CN201510367171.2A patent/CN104980143B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5986255A (en) * | 1996-06-12 | 1999-11-16 | Schneider Electric Sa | Photoelectric cell with lockable differential processing |
| CN201557093U (en) * | 2009-12-08 | 2010-08-18 | 佛山市顺德区和而泰电子科技有限公司 | Electronic self-locking circuit and device |
| CN101814726A (en) * | 2010-04-14 | 2010-08-25 | 罗康林 | Battery discharge prevention circuit |
| CN204597927U (en) * | 2015-06-29 | 2015-08-26 | 航天长峰朝阳电源有限公司 | Based on the triggering interlock circuit of operational amplifier |
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| Publication number | Publication date |
|---|---|
| CN104980143A (en) | 2015-10-14 |
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Inventor after: Liu Wei Inventor after: Ma Qiang Inventor after: Xu Yanhua Inventor after: Li Fengjun Inventor after: Wu Xianwen Inventor before: Liu Wei Inventor before: Xu Yanhua Inventor before: Li Fengjun Inventor before: Wu Xianwen |
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