CN106061034A - LED street lamp capable of following intensity changes of ambient light - Google Patents

LED street lamp capable of following intensity changes of ambient light Download PDF

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Publication number
CN106061034A
CN106061034A CN201610573058.4A CN201610573058A CN106061034A CN 106061034 A CN106061034 A CN 106061034A CN 201610573058 A CN201610573058 A CN 201610573058A CN 106061034 A CN106061034 A CN 106061034A
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China
Prior art keywords
street lamp
resistance
led
positive pole
connection circuit
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CN201610573058.4A
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Chinese (zh)
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黄月华
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Individual
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Individual
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Priority to CN201610573058.4A priority Critical patent/CN106061034A/en
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10Controlling the intensity of the light
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention provides an LED street lamp capable of following intensity changes of ambient light, which is characterized by comprising a 12 V DC power supply, an ambient light intensity detection circuit, a detection signal composite amplifying circuit, and an LED power driving circuit. According to the LED street lamp capable of following intensity changes of the ambient light, a photosensitive mode is adopted for control, the original integrated control is converted into decentralized control for the street lamps. When the ambient light is weak or dark, a light-change street lamp is automatically lightened, and the brightness is automatically adjusted. According to the light intensity conditions of the road environment, for example, in the case of cloudy rainy days or fog and haze days or fog days and other environmental factors, the street lamp is automatically turned on, and simultaneously, the brightness of the street lamp is automatically adjusted. In addition, the power consumption of the street lamp is reduced, the service life of the light-change street lamp is prolonged, the maintenance cost is reduced, the lamp replacement rate is reduced, and an intelligent control mode is provided for lamps in municipal roads.

Description

The LED street lamp of tracking environmental light intensity change
Technical field
The invention belongs to electronic technology and lighting technical field, be the LED about the change of a kind of tracking environmental light intensity Street lamp.
Background technology
Town road street lamp has arrived the time of regulation, and whole city is opened simultaneously or simultaneously closes off, for some section because being subject to Building or the impact of shade tree, need to open in advance street lamp, and some section or square ambient light are relatively more abundant, thus can be slow Any opens street lamp, and conventional road lamp does not have selective work characteristics, and its mode of operation is street lamp or all light, or Entirely go out, have no option.
The LED street lamp of tracking environmental light intensity of the present invention change takes photosensitive mode to control, and street lamp was by originally Whole centralized Control, be changed into dispersion and each control.When the illumination of ambient light is more weak or at dark, darkening street lamp will be certainly Moving and light, brightness simultaneously can be automatically adjusted.It can be according to the light intensity situation of road environment, such as: run into overcast and rainy or haze My god, or when playing the environmental factorss such as greasy weather, this street lamp can automatically open up, and the most automatically adjusts the brightness of street lamp.Additionally, it helps In reducing the power consumption of street lamp, extending the effects such as the service life of darkening street lamp, minimizing maintenance cost, reduction light fixture turnover rate, This street lamp is that town road street lamp provides a kind of intelligentized control method pattern simultaneously.
The LED street lamp of tracking environmental light intensity of the present invention change has that circuit is simple, working stability, performance can Leaning on, circuit only uses a small amount of common discrete component, and cost of manufacture only needs tens yuan, is suitable for factory's batch exploitation.
The LED street lamp of tracking environmental light intensity of the present invention described further below change is involved in implementation process And necessity, guardian technique content.
Summary of the invention
Goal of the invention and beneficial effect: the LED street lamp of tracking environmental light intensity of the present invention change is taked photosensitive Mode controls, and street lamp, by original whole centralized Control, is changed into dispersion and each controls.When the illumination of ambient light is more weak or sky Time black, darkening street lamp will be lighted automatically, and brightness simultaneously can be automatically adjusted.It can according to the light intensity situation of road environment, As: run into overcast and rainy or haze sky, or when playing the environmental factorss such as greasy weather, this street lamp can automatically open up, automatically adjust road simultaneously The brightness of lamp.Additionally, it contributes to reducing the power consumption of street lamp, extending the service life of darkening street lamp, minimizing maintenance cost, fall Low light fixture turnover rates etc. act on, and this street lamp is that town road street lamp provides a kind of intelligentized control method pattern simultaneously.
The LED street lamp of tracking environmental light intensity of the present invention change has that circuit is simple, working stability, performance can Leaning on, circuit only uses a small amount of common discrete component, and cost of manufacture only needs tens yuan, is suitable for factory's batch exploitation.
Circuit operation principle: the LED street lamp of tracking environmental light intensity change is by 1 NPN type triode VT1 and 1 PNP Type audion VT2 forms composite amplifier, and its luminous sensitivity is regulated by linear potentiometer RP.In NPN type triode VT1 Indirect 1 photoconductive resistance RG of base stage and circuit ground GND, makeup ring environmental light power testing circuit, become for light intensity Change detection automatically.The high and low level that it is exported by the colelctor electrode of PNP type triode VT2 is by load resistance R2, current-limiting resistance R3 Whether control the conducting of enhancement mode N-channel field effect transistor VT3, make highlighted white LED 1~LED16 light or Extinguish.
Time by day, owing to ambient light is brighter, when photoconductive resistance RG light is irradiated, its resistance is less, makes NPN type three pole The base voltage of pipe VT1 is constant at relatively electronegative potential, so compound being put by what NPN type triode VT1, PNP type triode VT2 formed Big circuit quits work, and now NPN type triode VT1, PNP type triode VT2 and enhancement mode N-channel field effect transistor VT3 are all cut Only, highlighted white LED 1~LED16 is made not work without electricity.
When ambient light is dark or to night, photoconductive resistance RG makes resistance increase because of unglazed irradiation, loses NPN The control ability of type audion VT1 base stage.So, the compound amplification being made up of NPN type triode VT1, PNP type triode VT2 Circuit is started working, and the colelctor electrode in PNP type triode VT2 exports between high period, by enhancement mode N-channel field effect transistor VT3 Drive highlighted white LED 1~LED16 luminous.During the colelctor electrode output low level of PNP type triode VT2, Because of the cut-off of enhancement mode N-channel field effect transistor VT3, highlighted white LED 1~LED16 extinguishes without electricity.
In the case of ambient light difference, the resistance of photoconductive resistance RG changes therewith, enhancement mode N-channel field effect transistor VT3 show as conducting or half on or off consecutive variations the most therewith, the conduction amount of enhancement mode N-channel field effect transistor VT3 also with Change, thus cause the luminosity of bright white light-emitting diode LED1~LED12 also to follow synchronization to change.
Technical characteristic: the LED street lamp of tracking environmental light intensity change, it includes that 12V DC source, ambient light are strong and weak Testing circuit, detection signal composite amplifier, LED power drive circuit, it is characterised in that:
Ambient light power testing circuit: it is made up of linear potentiometer RP, resistance R1 and photoconductive resistance RG, NPN type three One end of the base stage connecting resistance R1 of pole pipe VT1 and one end of photoconductive resistance RG, the other end of resistance R1 connects linear potentiometer RP's One end, the other end of linear potentiometer RP and movable end connection circuit positive pole VCC thereof, the other end connection circuit ground of photoconductive resistance RG GND;
Detection signal composite amplifier: it is made up of NPN type triode VT1, PNP type triode VT2 and resistance R2, The colelctor electrode of NPN type triode VT1 connects the base stage of PNP type triode VT2, the emitter stage connection circuit ground of NPN type triode VT1 GND, the emitter stage connection circuit positive pole VCC of PNP type triode VT2, the colelctor electrode of PNP type triode VT2 connects electricity by resistance R2 Ground, road GND;
LED power drive circuit: it is by resistance R3, enhancement mode N-channel field effect transistor VT3 and highlighted white light-emitting diode LED1~LED16 forms, and the colelctor electrode of PNP type triode VT2 connects the grid of enhancement mode N-channel field effect transistor VT3 by resistance R3 Pole, the source electrode connection circuit ground GND of enhancement mode N-channel field effect transistor VT3, the drain electrode of enhancement mode N-channel field effect transistor VT3 connects highlighted The negative pole of white light-emitting diode LED4, the negative pole of highlighted white LED 8, highlighted white LED 12 Negative pole and the negative pole of highlighted white LED 16, highlighted white LED 1~LED4 mutually contacts, high Brilliant white LED 5~LED8 mutually contacts, highlighted white LED 9~LED12 is mutually contacted, highlighted White light-emitting diode LED13~LED16 mutually contacts, the positive pole, highlighted white luminous of highlighted white LED 1 The positive pole of diode (LED) 5, the positive pole of highlighted white LED 9 and the positive pole of highlighted white LED 13 Connection circuit positive pole VCC;
The positive pole connection circuit positive pole VCC of 12V DC source, the negative pole connection circuit ground GND of 12V DC source.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit work of one embodiment of LED street lamp of the tracking environmental light intensity change that the present invention provides Schematic diagram.
Detailed description of the invention
The LED street lamp circuit fundamental diagram changed according to the tracking environmental light intensity shown in accompanying drawing 1 and accompanying drawing explanation, And according to annexation between components and parts in each several part circuit described in summary of the invention, and the components and parts described in embodiment Technical parameter requires and circuit production main points carry out enforcement and can realize the present invention, is correlated with the present invention below in conjunction with embodiment Technology is further described.
The technical parameter of components and parts and selection requirement thereof
RG is photoconductive resistance, and the technical parameter of photoconductive resistance is light resistance≤6K Ω, dark resistance >=1M Ω;
VT1 is NPN type triode, and the model of selection is 2SC9013 or 3DG12, it is desirable to β >=100;VT2 is positive-negative-positive three pole Pipe, the model of selection is 2SC9015 or 3DG21, it is desirable to β >=100;
VT3 is enhancement mode N-channel field effect transistor, and the model of selection is IRFZ30;
RP is linear potentiometer, and the resistance of use is 220K Ω;
The resistance of resistance R1 is 18K Ω;Resistance R2 resistance is 62K Ω;Resistance R3 resistance is 330K Ω;
LED1~LED16 is highlighted white light-emitting diode, selects white luminous two poles of diameter ¢ 8 high-power and high-luminance Pipe;
DC is 12V DC source, it is recommended to use output services electric current >=3A, 12V D.C. regulated power supply.
Circuit production main points and circuit debugging
Tracking environmental light intensity change LED street lamp shell select appropriately sized plastic housing, on housing face-plate with The corresponding position of sensitive surface of photoconductive resistance RG reserves photographic hole, in order to make ambient light testing circuit normally work, but photosensitive Hole necessarily can not be disturbed and misoperation by the light of LED street lamp voluntarily;
When circuit debugging, first cover the sensitive surface of photoconductive resistance RG by one piece of paperboard, in order to simulate night and half-light Environment.Now, composite amplifier should be started working, and is driven highlighted white luminous two by enhancement mode N-channel field effect transistor VT3 Pole pipe LED1~LED16 electrified light emitting;
Then, the paperboard on occlusion removal photoconductive resistance RG, now, composite amplifier should quit work, because strengthening Type N-channel field effect transistor VT3 is ended, and highlighted white LED 1~LED16 extinguishes because of dead electricity, and ambient light is described Testing circuit is working properly, and whole circuit can normally use;
Enhancement mode N-channel field effect transistor VT3 in the on-state, the source electrode of enhancement mode N-channel field effect transistor VT3 and drain electrode Between pressure drop the least, its pressure drop is the most negligible, thus drive power the biggest;If feeling highlighted white light-emitting diode luminance not Enough, can the connected mode of light emitting diode on accompanying drawing 1 circuit fundamental diagram to specifications, suitably increase highlighted white and send out The quantity of optical diode.
The circuit components layout of the present invention, circuit structure design, its shape of outward appearance and size thereof etc. are the most no It is the key technology of the present invention, is not claimed technology contents, because not affecting specific implementation process of the present invention, Therefore illustrate the most one by one.

Claims (1)

1. a LED street lamp for tracking environmental light intensity change, it includes 12V DC source, ambient light power detection electricity Road, detection signal composite amplifier, LED power drive circuit, it is characterised in that:
Described ambient light power testing circuit is made up of linear potentiometer RP, resistance R1 and photoconductive resistance RG, NPN type three pole One end of the base stage connecting resistance R1 of pipe VT1 and one end of photoconductive resistance RG, the other end of resistance R1 meets the one of linear potentiometer RP End, the other end of linear potentiometer RP and movable end connection circuit positive pole VCC thereof, the other end connection circuit ground GND of photoconductive resistance RG;
Described detection signal composite amplifier is made up of NPN type triode VT1, PNP type triode VT2 and resistance R2, NPN The colelctor electrode of type audion VT1 connects the base stage of PNP type triode VT2, the emitter stage connection circuit ground GND of NPN type triode VT1, The emitter stage connection circuit positive pole VCC of PNP type triode VT2, the colelctor electrode of PNP type triode VT2 is by resistance R2 connection circuit ground GND;
Described LED power drive circuit is by resistance R3, enhancement mode N-channel field effect transistor VT3 and highlighted white light-emitting diode LED1~LED16 forms, and the colelctor electrode of PNP type triode VT2 connects the grid of enhancement mode N-channel field effect transistor VT3 by resistance R3 Pole, the source electrode connection circuit ground GND of enhancement mode N-channel field effect transistor VT3, the drain electrode of enhancement mode N-channel field effect transistor VT3 connects highlighted The negative pole of white light-emitting diode LED4, the negative pole of highlighted white LED 8, highlighted white LED 12 Negative pole and the negative pole of highlighted white LED 16, highlighted white LED 1~LED4 mutually contacts, high Brilliant white LED 5~LED8 mutually contacts, highlighted white LED 9~LED12 is mutually contacted, highlighted White light-emitting diode LED13~LED16 mutually contacts, the positive pole, highlighted white luminous of highlighted white LED 1 The positive pole of diode (LED) 5, the positive pole of highlighted white LED 9 and the positive pole of highlighted white LED 13 Connection circuit positive pole VCC;
The positive pole connection circuit positive pole VCC of described 12V DC source, the negative pole connection circuit ground GND of 12V DC source.
CN201610573058.4A 2016-07-18 2016-07-18 LED street lamp capable of following intensity changes of ambient light Pending CN106061034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610573058.4A CN106061034A (en) 2016-07-18 2016-07-18 LED street lamp capable of following intensity changes of ambient light

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Application Number Priority Date Filing Date Title
CN201610573058.4A CN106061034A (en) 2016-07-18 2016-07-18 LED street lamp capable of following intensity changes of ambient light

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108172001A (en) * 2018-02-18 2018-06-15 周云侠 Become LED traffic signal lamp according to ambient light
CN111853641A (en) * 2020-08-05 2020-10-30 启奥光电科技(扬州)有限公司 LED street lamp with adjustable illumination range

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105101582A (en) * 2015-09-17 2015-11-25 黄月华 Light-controlled light-emitting diode (LED) night lamp
CN204968185U (en) * 2015-09-17 2016-01-13 黄月华 Little night -light of light -operated LED

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105101582A (en) * 2015-09-17 2015-11-25 黄月华 Light-controlled light-emitting diode (LED) night lamp
CN204968185U (en) * 2015-09-17 2016-01-13 黄月华 Little night -light of light -operated LED

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108172001A (en) * 2018-02-18 2018-06-15 周云侠 Become LED traffic signal lamp according to ambient light
CN111853641A (en) * 2020-08-05 2020-10-30 启奥光电科技(扬州)有限公司 LED street lamp with adjustable illumination range

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