CN101620258B - Voltage flash-stopping detecting circuit - Google Patents
Voltage flash-stopping detecting circuit Download PDFInfo
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- CN101620258B CN101620258B CN 200910038746 CN200910038746A CN101620258B CN 101620258 B CN101620258 B CN 101620258B CN 200910038746 CN200910038746 CN 200910038746 CN 200910038746 A CN200910038746 A CN 200910038746A CN 101620258 B CN101620258 B CN 101620258B
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- emitting diode
- mcu9
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Abstract
The invention discloses a voltage flash-stopping detecting circuit; the connecting method is as follows: an alternating current power supply to be detected is connected to a resistance 2 by a resistance 1 through voltage dropping, the other end of the resistance 2 is connected with a power supply, the middle points of the resistances 1 and 2 are divided into two branch circuits, one branch circuit is connected with the cathode of a light-emitting diode 3 which is internally arranged in an optoelectronic coupler U2, and the anode of the light-emitting diode 3 is connected with the power supply; the other branch circuit is connected with the anode of a light-emitting diode 4 which is internally arranged in an optoelectronic coupler U3, and the cathode of the light-emitting diode 4 is connected with the power supply; photoelectric tubes 5 and 6 at receiving ends of the two groups of the optoelectronic couplers are grounded emitters, and collector electrodes are grounded by serially connecting a resistance 7 and a capacitance 8. The circuit formation in the invention is scientific and rational, the working state is stable, and the circuit can effectively detect 10-millisecond level power-off state which affects the work of electronic equipment, and the state can be reported to the next-stage detecting equipment, so as to ensure to detect the moment power off of a computer power supply and ensure the working state of the electronic equipment to be timely reported when the state is damaged by moment power off of the power supply.
Description
Technical field
A kind of voltage flash-stopping detecting circuit.
Background technology
Modern electronic equipment is more and more higher to the requirement of mains supply supply, in case abnormity of power supply may cause electronic equipment to quit work or damage.Supply voltage instant cut-off (hereinafter to be referred as " sudden strain of a muscle stops ") particularly, managerial personnel difficulty discover, and are exactly some professional voltage monitoring equipment, because detection speed is fast inadequately, well monitoring voltage dodges and stops, and makes managerial personnel can not in time take treatment measures.
Summary of the invention
The objective of the invention is the design by a kind of brand-new circuit, sudden strain of a muscle more than 10 milliseconds stops to electronic equipment power source to make it, and good supervisory function bit is arranged.In case the sudden strain of a muscle that occurs more than 10 milliseconds stops situation, this circuit can be noted information, exports and keeps 10 seconds in the mode of voltage.But the voltage detecting equipment of the output join dependency of voltage or sound and light alarm equipment, thereby allow managerial personnel in time find and take appropriate measures.
Method of attachment of the present invention is as follows: detected AC power, power supply L end is connected to resistance 2 by resistance 1 step-down, the other end of resistance 2 connects power supply N end, resistance 1,2 intermediate points are divided into two branch roads, article one, branch road connects built-in light emitting diode 3 negative poles of photoelectrical coupler U2, and the positive pole of light emitting diode 3 connects power supply N end; Another branch road connects the positive pole of the built-in light emitting diode 4 of another photoelectrical coupler U3, and the negative pole of light emitting diode 4 connects power supply N end; The photoelectric tube 5,6 of two groups of photoelectrical coupler receiving ends is grounded emitter, and collector passes through series resistor 7, electric capacity 8 ground connection successively; The collector of photoelectric tube 5,6 connects 5 pin of MCU9 simultaneously and connects 1 pin of MCU9 by resistance 16; Power supply 17 shunt capacitances 14,15 are ground connection afterwards, connect 1 pin of MCU9 simultaneously; The 2 pin connecting resistances 10 of MCU9, the positive pole of resistance 10 sending and receiving optical diodes 12, the minus earth of light emitting diode 12; The 3 pin connecting resistances 11 of MCU9, the other end of resistance 11 is an output terminal.
The course of work of the present invention is as follows: as Fig. 1, and detected end 13 as interchange input, 5 pin of MCU9 become noble potential by pull-up resistor 16.As detected end the input of interchange is arranged, after detected power supply passes through resistance 1,2 step-downs and dividing potential drop, input to two photoelectrical coupler U2 and U3, the built-in light emitting diode of U2, U3 is done full-wave rectification to AC power, respectively the positive and negative half-wave of alternating current is sent to 5 pin of MCU9 by two photoelectrical couplers, because photoelectrical coupler 5,6 conductings in turn, this moment, 5 pin were electronegative potential, resistance 7 and electric capacity 8 mainly carry out smoothly 5 pin current potentials, the MCU9 internally stored program can be to the input of disappearance positive half-wave or negative half-wave, promptly 10 milliseconds do not have the sudden strains of a muscle of input disconnected, detect and judge.Because China's mains frequency is 50HZ, the time of per half sine wave is 10ms, when detecting 10 milliseconds when not having the pulse input, promptly has been considered as power supply and has dodged the situation of stopping.3 pin of MCU9 can be exported high potential signal this moment, and keep 10 seconds, realize power supply is dodged detection and the output that stops.
Circuit of the present invention is formed science, reasonable, stable working state, can effectively detect the 10 Millisecond off-positions that influence electronic device works, and this state " can be informed " the next stage checkout equipment, to guarantee that the computer power supply instant cut-off can be detected, when guaranteeing that the electronic device works state is subjected to the infringement of power supply instant cut-off, can in time be apprised of.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present invention, also is that specification digest is with scheming; Fig. 2 is the software flow pattern that MCU9 of the present invention uses.Each label is respectively among the figure: (1) (2) (7) (10) (11) (16) resistance, (3) (4) (12) light emitting diode, (5) (6) photoelectric receiving tube, (8) (14) (15) electric capacity, (9) MCU, (13) detected AC power, (17) direct supply, U2, U3 photoelectrical coupler.
Embodiment
The invention will be further described now to give an example in conjunction with the accompanying drawings.
Embodiment: resistance 1 is 220k, and resistance 2 is 10k, and resistance 7,10,11 is 1k, and resistance 16 is 10k; Photoelectrical coupler U2, U3 are P521, and electric capacity 8 is 1000PF, and electric capacity 14 is 0.01uF, and electric capacity 15 is 100uF, and MCU9 is U4, and model is PIC 12F29, and detected AC power 13 AC power are the 220V/50HZ civil power, and 17 is direct supply+5V.
Claims (1)
1. voltage flash-stopping detecting circuit, it is characterized in that: detected AC power, power supply L end is connected to resistance 2 by resistance 1 step-down, the other end of resistance 2 connects power supply N end, resistance 1,2 intermediate points are divided into two branch roads, article one, branch road connects built-in light emitting diode 3 negative poles of photoelectrical coupler U2, and the positive pole of light emitting diode 3 connects power supply N end; Another branch road connects the positive pole of the built-in light emitting diode 4 of another photoelectrical coupler U3, and the negative pole of light emitting diode 4 connects power supply N end; The photoelectric tube 5,6 of two groups of photoelectrical coupler receiving ends is grounded emitter, and collector passes through series resistor 7, electric capacity 8 ground connection successively; The collector of photoelectric tube 5,6 connects 5 pin of MCU9 simultaneously and connects 1 pin of MCU9 by resistance 16; Power supply 17 shunt capacitances 14,15 are ground connection afterwards, connect 1 pin of MCU9 simultaneously; The 2 pin connecting resistances 10 of MCU9, the positive pole of resistance 10 sending and receiving optical diodes 12, the minus earth of light emitting diode 12; The 3 pin connecting resistances 11 of MCU9, the other end of resistance 11 is an output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910038746 CN101620258B (en) | 2009-04-20 | 2009-04-20 | Voltage flash-stopping detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910038746 CN101620258B (en) | 2009-04-20 | 2009-04-20 | Voltage flash-stopping detecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101620258A CN101620258A (en) | 2010-01-06 |
| CN101620258B true CN101620258B (en) | 2011-04-06 |
Family
ID=41513592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910038746 Expired - Fee Related CN101620258B (en) | 2009-04-20 | 2009-04-20 | Voltage flash-stopping detecting circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN101620258B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102385036B (en) * | 2010-09-28 | 2014-06-04 | 深圳市英威腾电源有限公司 | Method and circuit for detecting alternating-current fuse failure of uninterruptible power supply |
| CN104111397B (en) * | 2013-04-18 | 2017-02-08 | 深圳市海洋王照明工程有限公司 | Power interruption detection circuit and lamp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5019995A (en) * | 1987-08-19 | 1991-05-28 | Fanuc Ltd. | Input signal discrimination method |
| CN200941114Y (en) * | 2006-08-31 | 2007-08-29 | 邢元军 | Three-phase three-line power source faults detecting circuit |
| CN200944134Y (en) * | 2006-08-31 | 2007-09-05 | 陈炳杰 | Three-phase four-wire power supply fault monitoring circuit |
-
2009
- 2009-04-20 CN CN 200910038746 patent/CN101620258B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5019995A (en) * | 1987-08-19 | 1991-05-28 | Fanuc Ltd. | Input signal discrimination method |
| CN200941114Y (en) * | 2006-08-31 | 2007-08-29 | 邢元军 | Three-phase three-line power source faults detecting circuit |
| CN200944134Y (en) * | 2006-08-31 | 2007-09-05 | 陈炳杰 | Three-phase four-wire power supply fault monitoring circuit |
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| Publication number | Publication date |
|---|---|
| CN101620258A (en) | 2010-01-06 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20110406 Termination date: 20130420 |