CN104023457A - Power failure detection circuit and lamp - Google Patents
Power failure detection circuit and lamp Download PDFInfo
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- CN104023457A CN104023457A CN201310067183.4A CN201310067183A CN104023457A CN 104023457 A CN104023457 A CN 104023457A CN 201310067183 A CN201310067183 A CN 201310067183A CN 104023457 A CN104023457 A CN 104023457A
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- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims abstract 9
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- 238000001914 filtration Methods 0.000 description 3
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Abstract
本发明属于检测电路领域，尤其涉及一种掉电检测电路及灯具。在本发明中，掉电检测电路采用常见的分立元件构成，交流电经过二极管D1整流，电阻R1限流，使光电隔离开关U1导通，从而直流电源导通，经由二极管D2整流，电容C1滤波，电阻R2和可调电阻RP组成稳压分压电路，合理调整RP电阻值使运算放大器U2的同相输入端的电压高于反相输入端，运算放大器U2输出高电平，当掉电时，运算放大器U2输出低电平，以便在经常掉电的情况下，可以进行掉电保护，提高了灯具的使用寿命。
The present invention belongs to the field of detection circuits, and in particular, relates to a power-off detection circuit and a lamp. In the present invention, the power-off detection circuit is composed of common discrete components, the alternating current is rectified by a diode D1, the resistor R1 is current limited, the photoelectric isolation switch U1 is turned on, and the direct current power supply is turned on, and the diode D2 is rectified, the capacitor C1 is filtered, and the resistor R2 and the adjustable resistor RP form a voltage-stabilizing voltage-dividing circuit, and the RP resistance value is reasonably adjusted so that the voltage of the in-phase input terminal of the operational amplifier U2 is higher than the inverting input terminal, and the operational amplifier U2 outputs a high level. When the power is off, the operational amplifier U2 outputs a low level, so that in the case of frequent power failures, power-off protection can be performed, thereby increasing the service life of the lamp.
Description
Technical field
The invention belongs to testing circuit field, relate in particular to a kind of power-fail detection circuit and light fixture.
Background technology
In a lot of light fixture use procedures, often because power down meeting causes the immediate current of light fixture excessive, produce burst current, in the occasion of frequent power down, light fixture stands the useful life that this impact can be shortened light fixture repeatedly.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of power-fail detection circuit, is intended to solve the occasion in frequent power down, and light fixture is repeatedly through the influenced problem that can shorten the useful life of light fixture.
The embodiment of the present invention is achieved in that a kind of power-fail detection circuit, connects the power down protection control end of light fixture, and described power-fail detection circuit comprises:
Diode D1, diode D2, voltage-stabiliser tube D3, resistance R 1, resistance R 2, adjustable resistance RP, resistance R 4, photoelectric switch U1, operational amplifier U2 and capacitor C 1;
The anode of described diode D1 connects AC power, the negative electrode of described diode D1 connects the first end of described resistance R 1, the anode of the light-emitting diode of photoelectric switch U1 described in the second termination of described resistance R 1, the negative electrode of described light-emitting diode connects AC power, the collector electrode of the triode of described photoelectric switch U1 connects DC power supply, the emitter of the triode of described photoelectric switch U1 connects the anode of described diode D2, the first end of the negative electrode connecting resistance R2 of described diode D2, the in-phase input end of operational amplifier U2 described in the second termination of described resistance R 2, described capacitor C 1 is connected between the first end and ground of described resistance R 2, described adjustable resistance RP is connected between second end and ground of described resistance R 2, the negative electrode of described voltage-stabiliser tube D3 connects DC power supply, the plus earth of described voltage-stabiliser tube D3, the negative electrode of voltage-stabiliser tube D3 described in the anti-phase input termination of described operational amplifier U2, the power down protection control end of the output termination light fixture of described operational amplifier U2, described resistance R 4 is connected between described DC power supply and the output of operational amplifier U2.
Another object of the embodiment of the present invention is to provide a kind of light fixture, comprises power-fail detection circuit, and described power-fail detection circuit connects the power down protection control end of light fixture, and described power-fail detection circuit comprises:
Diode D1, diode D2, voltage-stabiliser tube D3, resistance R 1, resistance R 2, adjustable resistance RP, resistance R 4, photoelectric switch U1, operational amplifier U2 and capacitor C 1;
The anode of described diode D1 connects AC power, the negative electrode of described diode D1 connects the first end of described resistance R 1, the anode of the light-emitting diode of photoelectric switch U1 described in the second termination of described resistance R 1, the negative electrode of described light-emitting diode connects AC power, the collector electrode of the triode of described photoelectric switch U1 connects DC power supply, the emitter of the triode of described photoelectric switch U1 connects the anode of described diode D2, the first end of the negative electrode connecting resistance R2 of described diode D2, the in-phase input end of operational amplifier U2 described in the second termination of described resistance R 2, described capacitor C 1 is connected between the first end and ground of described resistance R 2, described adjustable resistance RP is connected between second end and ground of described resistance R 2, the negative electrode of described voltage-stabiliser tube D3 connects DC power supply, the plus earth of described voltage-stabiliser tube D3, the negative electrode of voltage-stabiliser tube D3 described in the anti-phase input termination of described operational amplifier U2, the power down protection control end of the output termination light fixture of described operational amplifier U2, described resistance R 4 is connected between described DC power supply and the output of operational amplifier U2.
In embodiments of the present invention, power-fail detection circuit adopts common discrete component to form, alternating current is through diode D1 rectification, resistance R 1 current limliting, make photoelectric switch U1 conducting, thereby DC power supply conducting, via diode D2 rectification, capacitor C 1 filtering, resistance R 2 and adjustable resistance RP form partial pressure circuit of steady voltage, rationally adjusting RP resistance value makes the voltage of in-phase input end of operational amplifier U2 higher than inverting input, operational amplifier U2 exports high level, when power down, operational amplifier U2 output low level, so that the in the situation that of frequent power down, can carry out power down protection, improved the useful life of light fixture.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the power-fail detection circuit that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows the circuit structure of the power-fail detection circuit that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows.
A power-fail detection circuit, connects the power down protection control end of light fixture, and described power-fail detection circuit comprises:
Diode D1, diode D2, voltage-stabiliser tube D3, resistance R 1, resistance R 2, adjustable resistance RP, resistance R 4, photoelectric switch U1, operational amplifier U2 and capacitor C 1;
The anode of described diode D1 connects AC power, the negative electrode of described diode D1 connects the first end of described resistance R 1, the anode of the light-emitting diode of photoelectric switch U1 described in the second termination of described resistance R 1, the negative electrode of described light-emitting diode connects AC power, the collector electrode of the triode of described photoelectric switch U1 meets DC power supply (+5V, following DC power supply is all+5V), the emitter of the triode of described photoelectric switch U1 connects the anode of described diode D2, the first end of the negative electrode connecting resistance R2 of described diode D2, the in-phase input end of operational amplifier U2 described in the second termination of described resistance R 2, described capacitor C 1 is connected between the first end and ground of described resistance R 2, described adjustable resistance RP is connected between second end and ground of described resistance R 2, the negative electrode of described voltage-stabiliser tube D3 connects DC power supply, the plus earth of described voltage-stabiliser tube D3, the negative electrode of voltage-stabiliser tube D3 described in the anti-phase input termination of described operational amplifier U2, the power down protection control end of the output termination light fixture of described operational amplifier U2, described resistance R 4 is connected between described DC power supply and the output of operational amplifier U2.
As one embodiment of the invention, described photoelectric switch U1 adopts the photoelectric switch that model is TLP521.
As one embodiment of the invention, described operational amplifier U2 adopts the operational amplifier that model is LM358.
The embodiment of the present invention also provides a kind of light fixture, comprises power-fail detection circuit, and described power-fail detection circuit connects the power down protection control end of light fixture, and described power-fail detection circuit comprises:
Diode D1, diode D2, voltage-stabiliser tube D3, resistance R 1, resistance R 2, adjustable resistance RP, resistance R 4, photoelectric switch U1, operational amplifier U2 and capacitor C 1;
The anode of described diode D1 connects AC power, the negative electrode of described diode D1 connects the first end of described resistance R 1, the anode of the light-emitting diode of photoelectric switch U1 described in the second termination of described resistance R 1, the negative electrode of described light-emitting diode connects AC power, the collector electrode of the triode of described photoelectric switch U1 connects DC power supply, the emitter of the triode of described photoelectric switch U1 connects the anode of described diode D2, the first end of the negative electrode connecting resistance R2 of described diode D2, the in-phase input end of operational amplifier U2 described in the second termination of described resistance R 2, described capacitor C 1 is connected between the first end and ground of described resistance R 2, described adjustable resistance RP is connected between second end and ground of described resistance R 2, the negative electrode of described voltage-stabiliser tube D3 connects DC power supply, the plus earth of described voltage-stabiliser tube D3, the negative electrode of voltage-stabiliser tube D3 described in the anti-phase input termination of described operational amplifier U2, the power down protection control end of the output termination light fixture of described operational amplifier U2, described resistance R 4 is connected between described DC power supply and the output of operational amplifier U2.
As one embodiment of the invention, described photoelectric switch U1 adopts the photoelectric switch that model is TLP521.
As one embodiment of the invention, described operational amplifier U2 adopts the operational amplifier that model is LM358.
The operation principle of power-fail detection circuit is:
Power-fail detection circuit adopts common discrete component to form; alternating current is through diode D1 rectification; resistance R 1 current limliting; make photoelectric switch U1 conducting; thereby DC power supply conducting; via diode D2 rectification; capacitor C 1 filtering; resistance R 2 and adjustable resistance RP form partial pressure circuit of steady voltage, rationally adjust RP resistance value and make the voltage of in-phase input end of operational amplifier U2 higher than inverting input, and operational amplifier U2 exports high level; when power down; operational amplifier U2 output low level, to the in the situation that of frequent power down, can carry out power down protection.
In embodiments of the present invention, power-fail detection circuit adopts common discrete component to form, alternating current is through diode D1 rectification, resistance R 1 current limliting, make photoelectric switch U1 conducting, thereby DC power supply conducting, via diode D2 rectification, capacitor C 1 filtering, resistance R 2 and adjustable resistance RP form partial pressure circuit of steady voltage, rationally adjusting RP resistance value makes the voltage of in-phase input end of operational amplifier U2 higher than inverting input, operational amplifier U2 exports high level, when power down, operational amplifier U2 output low level, so that the in the situation that of frequent power down, can carry out power down protection, improved the useful life of light fixture.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310067183.4A CN104023457A (en) | 2013-03-01 | 2013-03-01 | Power failure detection circuit and lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310067183.4A CN104023457A (en) | 2013-03-01 | 2013-03-01 | Power failure detection circuit and lamp |
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| CN104023457A true CN104023457A (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310067183.4A Pending CN104023457A (en) | 2013-03-01 | 2013-03-01 | Power failure detection circuit and lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509271A (en) * | 2017-08-28 | 2017-12-22 | 广东明丰电源电器实业有限公司 | A switch switching circuit and LED lamp |
| CN109085514A (en) * | 2018-08-16 | 2018-12-25 | 北京泰恒众信科技有限公司 | Break period test method and tester |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010129210A (en) * | 2008-11-25 | 2010-06-10 | Toshiba Lighting & Technology Corp | Emergency use lighting device |
| CN101778505A (en) * | 2009-01-09 | 2010-07-14 | 倪建冲 | User-friendly control method for LED lamps |
| CN102355046A (en) * | 2011-09-09 | 2012-02-15 | Tcl新技术（惠州）有限公司 | Voltage detection and power failure protection device and implementation method |
| CN202261939U (en) * | 2011-09-02 | 2012-05-30 | 沈新汉 | Emergency control system applied to LED (light emitting diode) illumination lamp |
| CN202392666U (en) * | 2011-11-30 | 2012-08-22 | 深圳建溢宝电子有限公司 | Emergency lamp |
| CN102685994A (en) * | 2012-05-29 | 2012-09-19 | 耿波 | Emergency lamp power supply device |
| CN102762010A (en) * | 2011-04-28 | 2012-10-31 | 杨香莲 | Induction type illumination device for illuminating during power failure |
| EP2528418A2 (en) * | 2011-05-23 | 2012-11-28 | Panasonic Corporation | Dimming signal generation device and illumination control system using same |
| CN202647542U (en) * | 2012-06-27 | 2013-01-02 | 厦门普为光电科技有限公司 | LED tube with conventional lighting function and emergency lighting function |
-
2013
- 2013-03-01 CN CN201310067183.4A patent/CN104023457A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010129210A (en) * | 2008-11-25 | 2010-06-10 | Toshiba Lighting & Technology Corp | Emergency use lighting device |
| CN101778505A (en) * | 2009-01-09 | 2010-07-14 | 倪建冲 | User-friendly control method for LED lamps |
| CN102762010A (en) * | 2011-04-28 | 2012-10-31 | 杨香莲 | Induction type illumination device for illuminating during power failure |
| EP2528418A2 (en) * | 2011-05-23 | 2012-11-28 | Panasonic Corporation | Dimming signal generation device and illumination control system using same |
| EP2528418A3 (en) * | 2011-05-23 | 2015-04-15 | Panasonic Intellectual Property Management Co., Ltd. | Dimming signal generation device and illumination control system using same |
| CN202261939U (en) * | 2011-09-02 | 2012-05-30 | 沈新汉 | Emergency control system applied to LED (light emitting diode) illumination lamp |
| CN102355046A (en) * | 2011-09-09 | 2012-02-15 | Tcl新技术（惠州）有限公司 | Voltage detection and power failure protection device and implementation method |
| CN202392666U (en) * | 2011-11-30 | 2012-08-22 | 深圳建溢宝电子有限公司 | Emergency lamp |
| CN102685994A (en) * | 2012-05-29 | 2012-09-19 | 耿波 | Emergency lamp power supply device |
| CN202647542U (en) * | 2012-06-27 | 2013-01-02 | 厦门普为光电科技有限公司 | LED tube with conventional lighting function and emergency lighting function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509271A (en) * | 2017-08-28 | 2017-12-22 | 广东明丰电源电器实业有限公司 | A switch switching circuit and LED lamp |
| CN109085514A (en) * | 2018-08-16 | 2018-12-25 | 北京泰恒众信科技有限公司 | Break period test method and tester |
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Application publication date: 20140903 |