CN102209409A - Light-controlled electronic switching circuit - Google Patents
Light-controlled electronic switching circuit Download PDFInfo
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- CN102209409A CN102209409A CN2010101370597A CN201010137059A CN102209409A CN 102209409 A CN102209409 A CN 102209409A CN 2010101370597 A CN2010101370597 A CN 2010101370597A CN 201010137059 A CN201010137059 A CN 201010137059A CN 102209409 A CN102209409 A CN 102209409A
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- light
- comparator
- switching circuit
- electric switch
- electronic switching
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Abstract
The invention relates to a light-controlled electronic switching circuit for controlling the switch-on and switch-off of a lamp. The light-controlled electronic switching circuit comprises a photosensitive element used for sensing the brightness of an external natural light, a variable resistor, a comparator, an electric switch, a first diode, a second diode, a first capacitor, a second capacitor and a resistor. When the photosensitive element senses that the brightness of the external natural light is greater than or equal to the preset brightness, the comparator outputs a low level signal, and the electric switch is switched off to disconnect the lamp from an alternating-current voltage source; and when the photosensitive element senses that the brightness of the external natural light is smaller than the preset brightness, the comparator outputs a high level signal, and the electric switch is switched on to connect the lamp with the alternating-current voltage source. The light-controlled electronic switching circuit realizes the control of the lamp by automatically sensing the brightness of the natural light.
Description
Technical field
The present invention relates to a kind of electronic switching circuit, particularly a kind of light-controlled electronic switching circuit.
Background technology
Some public places adopt the mode of artificial control on/off to control the illumination of public place as the illumination in street etc., but adopt and control on/off in such a way and occur in easily and forget the situation of cutting off the electricity supply when need not to throw light on daytime, the waste electric energy, but forget the situation of energized in the time of also can taking place to throw light on night, in a word, adopt artificial mode to control the very inconvenience of illumination of public place.
Summary of the invention
In view of above content, be necessary to provide a kind of light-controlled electronic switching circuit, control the illumination of public place by the brightness of automatic sensing natural daylight.
A kind of light-controlled electronic switching circuit, be used to control the break-make of an illuminating lamp, described light-controlled electronic switching circuit comprises a light-sensitive element, one variable resistance, one comparator, one electric switch, first and second diode, first and second electric capacity and a resistance, first end of described electric switch is connected to first end of an alternating-current voltage source by described illuminating lamp, second end of described electric switch is connected to second end of described alternating-current voltage source, the negative electrode of described first diode is connected to the anode of described second diode, and be connected to first end of described alternating voltage by described first electric capacity, the anode of described first diode is connected to second end of institute's alternating-current voltage source, described light-sensitive element and described variable resistance are connected in series with between the negative electrode and ground of described second diode, described second electric capacity is connected between the anode and described second diode cathode of described first diode, the in-phase input end of described comparator receives a reference voltage, the inverting input of described comparator is connected on the node between described light-sensitive element and the described variable resistance, the output of described comparator is connected to the control end of described electric switch by described resistance, when described light-sensitive element senses extraneous natural light brightness more than or equal to a default brightness, described comparator is exported a low level signal, described electric switch ends and disconnects being connected of described illuminating lamp and described alternating-current voltage source, when described light-sensitive element senses extraneous natural light brightness less than described default brightness, described comparator terminal is exported a high level signal, and described electric switch conducting is connected described illuminating lamp with described alternating-current voltage source.
A kind of light-controlled electronic switching circuit is used to control the break-make of an illuminating lamp, described light-controlled electronic switching circuit comprises a light-sensitive element, one variable resistance, one comparator, one electric switch, first end of described electric switch is connected to first end of a direct current voltage source by described illuminating lamp, second end of described electric switch is connected to second end of described direct voltage source, described light-sensitive element and described variable resistance polyphone are connected on the two ends of described direct voltage source, the in-phase input end of described comparator receives a reference voltage, the inverting input of described comparator is connected on the node between described light-sensitive element and the described variable resistance, the output of described comparator is connected to the control end of described electric switch, when described light-sensitive element senses extraneous natural light brightness more than or equal to a default brightness, described comparator is exported a low level signal and is controlled described electric switch and end and disconnect being connected of described illuminating lamp and described direct voltage source, when described light-sensitive element sensed extraneous natural light brightness less than described default brightness, described comparator was exported a high level signal and is controlled described electric switch conducting described illuminating lamp is connected with described alternating-current voltage source.
The present invention utilizes described light-sensitive element to come described illuminating lamp is controlled, the i.e. brightness that senses extraneous nature when described light-sensitive element is during more than or equal to described default brightness, described comparator is exported a low level signal and is controlled described electric switch disconnection, thereby disconnect being connected of described illuminating lamp and described voltage source, the brightness that senses extraneous nature when described light-sensitive element is during less than described default brightness, and described comparator is exported a high level signal and controlled described electric switch conducting described illuminating lamp is connected with described alternating-current voltage source.Thereby the brightness that has realized automatic sensing natural daylight comes described illuminating lamp is controlled.
Description of drawings
Below in conjunction with accompanying drawing and better embodiment the present invention is described in further detail:
Fig. 1 is the circuit diagram of the better embodiment of light-controlled electronic switching circuit of the present invention.
The main element symbol description
Illuminating lamp 10
Alternating-current voltage source 20
Capacitor C 1, C2
Resistance R 1, R2
Variable resistance Rs
Photodiode D1
The first diode D2
The second diode D3
Voltage stabilizing didoe D4
Comparator U
Bidirectional triode thyristor SCR
Embodiment
Please refer to Fig. 1, the better embodiment of light-controlled electronic switching circuit 100 of the present invention comprise a light-sensitive element as a photodiode D1, a variable resistance Rs, a comparator U, an electric switch as a two-way controllable silicon SCR, capacitor C 1 and C2, resistance R 1 and R2, a voltage stabilizing didoe D4 and first and second diode D2 and D3.
The first main electrode end of described bidirectional triode thyristor SCR is connected to first end of an alternating-current voltage source 20 by an illuminating lamp 10.The second main electrode end of described bidirectional triode thyristor SCR is connected to second end of described alternating-current voltage source 20.The negative electrode of the described first diode D2 is connected to the anode of the described second diode D3, and is connected to first end of described alternating-current voltage source 20 by described capacitor C 1.The anode of the described first diode D2 is connected to second end of described alternating-current voltage source 20.The negative electrode of the described second diode D3 is connected to the anode of described photodiode D1, and is connected to second end of described alternating-current voltage source 20 by described capacitor C 2.The negative electrode of described photodiode D1 is by described variable resistance Rs ground connection.The negative electrode of described voltage stabilizing didoe D4 is connected to the anode of described photodiode D1 by described resistance R 1.The plus earth of described voltage stabilizing didoe D4.The in-phase input end of described comparator U is connected on the node of described resistance R 1 and described voltage stabilizing didoe D4.The inverting input of described comparator U is connected on the node of described photodiode D1 and described variable resistance Rs.The output of described comparator U is connected to the control end of described bidirectional triode thyristor SCR by described resistance R 2.The voltage end of described comparator U is connected to the anode of described photodiode D1.The earth terminal ground connection of described comparator U.
In the present embodiment, described first and second diode D2 and D3 are used for the ac voltage rectifier that described alternating-current voltage source 20 provides is become a direct current voltage.Described voltage stabilizing didoe D4 and described resistance R 1 are used for that described direct voltage is carried out dividing potential drop and obtain the in-phase input end that a reference voltage offers described comparator U.The brightness that described photodiode D1 is used for the extraneous natural daylight of sensing changes its resistance.The resistance of described photodiode D1 strengthens along with the brightness of extraneous natural daylight and reduces, and increases along with the brightness deterioration of natural daylight.So when described photodiode D1 senses natural daylight when being a default brightness, the resistance of described photodiode D1 is R0.The resistance of regulating described variable resistance Rs according to described reference voltage and the described photodiode D1 resistance R0 when the described default brightness, make when brightness when extraneous natural daylight is not more than described default brightness, the voltage that offers the inverting input of described comparator U makes described comparator U export a high level signal less than described reference voltage, with the described bidirectional triode thyristor SCR of conducting, and make that when the brightness that senses extraneous natural daylight during greater than described default brightness, the voltage that offers the inverting input of described comparator U makes described comparator U output low level signal disconnect described bidirectional triode thyristor SCR greater than described reference voltage.The concrete course of work of light-controlled electronic switching circuit 100 is as follows:
In the time of by day, the brightness of extraneous natural daylight is not less than described default brightness, and described photodiode Rs resistance is not more than its resistance R0 when presetting brightness.The voltage of the inverting input of described comparator U is not less than the reference voltage of the normal phase input end of described comparator U, the output output low level signal of described comparator U is to the control end of described controllable silicon SCR, thereby described controllable silicon SCR is by disconnecting being connected of described illuminating lamp 10 and described voltage source 20, and described illuminating lamp 10 is in and extinguishes state.When entering night, the brightness of extraneous natural daylight is less than described default brightness, and described photodiode D1 resistance is greater than its resistance R0 when presetting brightness.The voltage of the inverting input of described comparator U is less than the reference voltage of the normal phase input end of described comparator U, the output output high level signal of described comparator U is to the control end of described controllable silicon SCR, make described controllable silicon SCR conducting, thereby described illuminating lamp 10 is communicated with described voltage source 20, and described illuminating lamp 10 is in illumination condition.
In other embodiments, described illuminating lamp 10 also can connect a direct current voltage source, then deletes described first and second diode D2, D3 and capacitor C 1 and C2.
Described light-controlled electronic switching circuit 100 changes its resistance by the brightness of the extraneous natural daylight of described photodiode D1 sensing, thereby change the voltage that offers described comparator U inverting input, make in the brightness of extraneous natural daylight during less than described default brightness, the described bidirectional triode thyristor SCR of conducting makes described illuminating lamp 20 be in illumination condition, make when the brightness at extraneous natural daylight is not less than described default brightness, disconnect described bidirectional triode thyristor SCR and described illuminating lamp 20 is in extinguish state.Thereby the brightness that has realized automatic sensing natural daylight comes described illuminating lamp is controlled.
Claims (6)
1. light-controlled electronic switching circuit, be used to control the break-make of an illuminating lamp, described light-controlled electronic switching circuit comprises a light-sensitive element, one variable resistance, one comparator, one electric switch, first and second diode, first and second electric capacity and a resistance, first end of described electric switch is connected to first end of an alternating-current voltage source by described illuminating lamp, second end of described electric switch is connected to second end of described alternating-current voltage source, the negative electrode of described first diode is connected to the anode of described second diode, and be connected to first end of described alternating voltage by described first electric capacity, the anode of described first diode is connected to second end of institute's alternating-current voltage source, described light-sensitive element and described variable resistance are connected in series with between the negative electrode and ground of described second diode, described second electric capacity is connected between the anode and described second diode cathode of described first diode, the in-phase input end of described comparator receives a reference voltage, the inverting input of described comparator is connected on the node between described light-sensitive element and the described variable resistance, the output of described comparator is connected to the control end of described electric switch by described resistance, when described light-sensitive element senses extraneous natural light brightness more than or equal to a default brightness, described comparator is exported a low level signal, described electric switch ends and disconnects being connected of described illuminating lamp and described alternating-current voltage source, when described light-sensitive element senses extraneous natural light brightness less than described default brightness, described comparator terminal is exported a high level signal, and described electric switch conducting is connected described illuminating lamp with described alternating-current voltage source.
2. light-controlled electronic switching circuit as claimed in claim 1, it is characterized in that: described light-sensitive element is a photodiode, the anode of described photodiode connects the negative electrode of described second diode, and the negative electrode of described photodiode is by described variable resistance ground connection.
3. light-controlled electronic switching circuit as claimed in claim 2, it is characterized in that: described light-controlled electronic switching circuit also comprises a resistance and a voltage stabilizing didoe, the negative electrode of described voltage stabilizing didoe is connected to the anode of described photodiode by described resistance, the plus earth of described voltage stabilizing didoe, the in-phase input end of described comparator is connected on the node of described voltage stabilizing didoe and described resistance.
4. a light-controlled electronic switching circuit is used to control the break-make of an illuminating lamp, described light-controlled electronic switching circuit comprises a light-sensitive element, one variable resistance, one comparator, one electric switch, first end of described electric switch is connected to first end of a direct current voltage source by described illuminating lamp, second end of described electric switch is connected to second end of described direct voltage source, described light-sensitive element and described variable resistance polyphone are connected on the two ends of described direct voltage source, the in-phase input end of described comparator receives a reference voltage, the inverting input of described comparator is connected on the node between described light-sensitive element and the described variable resistance, the output of described comparator is connected to the control end of described electric switch, when described light-sensitive element senses extraneous natural light brightness more than or equal to a default brightness, described comparator is exported a low level signal and is controlled described electric switch and end and disconnect being connected of described illuminating lamp and described direct voltage source, when described light-sensitive element sensed extraneous natural light brightness less than described default brightness, described comparator was exported a high level signal and is controlled described electric switch conducting described illuminating lamp is connected with described alternating-current voltage source.
5. light-controlled electronic switching circuit as claimed in claim 4, it is characterized in that: described light-sensitive element is a photodiode, the anode of described photodiode connects the negative electrode of described second diode, and the negative electrode of described photodiode is by described variable resistance ground connection.
6. light-controlled electronic switching circuit as claimed in claim 5, it is characterized in that: described light-controlled electronic switching circuit also comprises a resistance and a voltage stabilizing didoe, the negative electrode of described voltage stabilizing didoe is connected to the anode of described photodiode by described resistance, the plus earth of described voltage stabilizing didoe, the in-phase input end of described comparator is connected on the node of described voltage stabilizing didoe and described resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101370597A CN102209409A (en) | 2010-03-31 | 2010-03-31 | Light-controlled electronic switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101370597A CN102209409A (en) | 2010-03-31 | 2010-03-31 | Light-controlled electronic switching circuit |
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| Publication Number | Publication Date |
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| CN102209409A true CN102209409A (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101370597A Pending CN102209409A (en) | 2010-03-31 | 2010-03-31 | Light-controlled electronic switching circuit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281067A (en) * | 2013-06-14 | 2013-09-04 | 成都锐奕信息技术有限公司 | False-operation resistant buffering port |
| CN103346762A (en) * | 2013-06-14 | 2013-10-09 | 成都锐奕信息技术有限公司 | Circuit switch preventing accidental touching |
| CN104581056A (en) * | 2014-12-23 | 2015-04-29 | 深圳市锐明视讯技术有限公司 | Photosensitive sensor-based auxiliary image adjustment method and device |
| CN104780641A (en) * | 2014-01-10 | 2015-07-15 | 海洋王（东莞）照明科技有限公司 | Lighting drive circuit |
| CN104852719A (en) * | 2015-04-30 | 2015-08-19 | 浙江帅康电气股份有限公司 | Light-operated touching-type keying operation-based range hood |
| CN105025622A (en) * | 2015-06-29 | 2015-11-04 | 叶秀兰 | Light-triggering automatic LED lamp |
| CN105025623A (en) * | 2015-06-29 | 2015-11-04 | 叶秀兰 | Light-triggering LED lamp based on DC-DC boost drive |
| CN106028600A (en) * | 2016-07-12 | 2016-10-12 | 黄月华 | Variable light street lamp with brightness changing with environment |
| CN107277971A (en) * | 2017-06-16 | 2017-10-20 | 浙江阳光美加照明有限公司 | A kind of light-controlled switching circuit of LED |
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| US4223303A (en) * | 1978-12-11 | 1980-09-16 | General Electric Company | Alarm devices for interconnected multi-device systems |
| CN2245319Y (en) * | 1995-05-23 | 1997-01-15 | 王志军 | Controller for illuminating lamp and lanterns |
| CN200950684Y (en) * | 2006-09-08 | 2007-09-19 | 大庆石油学院 | Energy-saving LED road lamp lighting control system |
| CN201054834Y (en) * | 2007-01-05 | 2008-04-30 | 汤伟 | Toilet floodlight self control door lock |
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| US4223303A (en) * | 1978-12-11 | 1980-09-16 | General Electric Company | Alarm devices for interconnected multi-device systems |
| CN2245319Y (en) * | 1995-05-23 | 1997-01-15 | 王志军 | Controller for illuminating lamp and lanterns |
| CN200950684Y (en) * | 2006-09-08 | 2007-09-19 | 大庆石油学院 | Energy-saving LED road lamp lighting control system |
| CN201054834Y (en) * | 2007-01-05 | 2008-04-30 | 汤伟 | Toilet floodlight self control door lock |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281067A (en) * | 2013-06-14 | 2013-09-04 | 成都锐奕信息技术有限公司 | False-operation resistant buffering port |
| CN103346762A (en) * | 2013-06-14 | 2013-10-09 | 成都锐奕信息技术有限公司 | Circuit switch preventing accidental touching |
| CN104780641A (en) * | 2014-01-10 | 2015-07-15 | 海洋王（东莞）照明科技有限公司 | Lighting drive circuit |
| CN104581056A (en) * | 2014-12-23 | 2015-04-29 | 深圳市锐明视讯技术有限公司 | Photosensitive sensor-based auxiliary image adjustment method and device |
| CN104581056B (en) * | 2014-12-23 | 2019-01-15 | 深圳市锐明技术股份有限公司 | A kind of method and device based on photosensitive sensor assisted image adjustment |
| CN104852719A (en) * | 2015-04-30 | 2015-08-19 | 浙江帅康电气股份有限公司 | Light-operated touching-type keying operation-based range hood |
| CN105025622A (en) * | 2015-06-29 | 2015-11-04 | 叶秀兰 | Light-triggering automatic LED lamp |
| CN105025623A (en) * | 2015-06-29 | 2015-11-04 | 叶秀兰 | Light-triggering LED lamp based on DC-DC boost drive |
| CN106028600A (en) * | 2016-07-12 | 2016-10-12 | 黄月华 | Variable light street lamp with brightness changing with environment |
| CN107277971A (en) * | 2017-06-16 | 2017-10-20 | 浙江阳光美加照明有限公司 | A kind of light-controlled switching circuit of LED |
| CN107277971B (en) * | 2017-06-16 | 2023-08-29 | 浙江阳光美加照明有限公司 | Light-operated switch circuit of LED lamp |
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Application publication date: 20111005 |