CN204554564U - Intelligent power-saving street lamp - Google Patents
Intelligent power-saving street lamp Download PDFInfo
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- CN204554564U CN204554564U CN201520300569.XU CN201520300569U CN204554564U CN 204554564 U CN204554564 U CN 204554564U CN 201520300569 U CN201520300569 U CN 201520300569U CN 204554564 U CN204554564 U CN 204554564U
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a kind of intelligent power-saving street lamp, comprise shell, the lower surface of described shell is provided with opening, be provided with an illuminator and one in the inner chamber of described shell for controlling the illumination control circuit of the switch of illuminator, the light-emitting area of described illuminator is exposed from described opening part; On the housing, one is provided with for gathering the light-operated probe of the brightness of external ambient light; The switch lighting of described illumination control circuit illuminator according to external ambient light brilliance control.Intelligent power-saving street lamp of the present utility model, have by external ambient light brilliance control illumination, turn on light turn off the light, economize on electricity low without the need to manual operation, production cost, install and the advantage such as maintenance maintenance is convenient.
Description
Technical field
The utility model relates to a kind of intelligent power-saving street lamp.
Background technology
The brightness of LED superelevation, outstanding power savings, generally acknowledge by the world.Universal LED illumination is imperative, National Development and Reform Committee in 2013, energy-conservation do to combine to have worked out greatly develop universal LED illumination state basic policy.Shenzhen Municipal Government general in 2014 has first issued the whole city and has popularized LED illumination and transform old-fashioned road illuminating lamp embodiment.China is big developing country, and universal LED new light sources, there is no technical standard and road lamp management specification both at home and abroad.Employing cost is low, the intelligent power-saving street lamp of stable performance, and to promoting development, universal LED road electric saving illumination is particularly important, can save electric energy in a large number.
Every country government of the road lighting world all takes much count of, and is a utility.At present, all night street lamp kept burning day and night is at developed regions ubiquity, many local due to staff's carelessness, and the entirely bright phenomenon of daytime street lamp also happens occasionally, and causes very large waste of energy.The Chinese government calls the whole people to practise strict economy, design a kind of can the street lamp of the environmentally illuminating energy-saving of brightness automatic switch necessary.
Utility model content
The utility model is for avoiding the weak point that exists in above-mentioned prior art, providing a kind of intelligent power-saving street lamp so that realize street lamp under surround lighting controls automatic switch, save electric energy and to reduce the production cost of street lamp low.
The utility model be technical solution problem by the following technical solutions.
Intelligent power-saving street lamp, its design feature is, comprise shell 1, the lower surface of described shell 1 is provided with opening, be provided with an illuminator 2 and one in the inner chamber of described shell 1 for controlling the illumination control circuit of the switch of illuminator 2, the light-emitting area of described illuminator 2 is exposed from the opening of described shell 1; On described shell 1, be provided with one for gathering the light-operated probe 3 of the brightness of external ambient light; The switch of described illumination control circuit illuminator 2 according to external ambient light brilliance control throws light on.
The design feature of intelligent power-saving street lamp of the present utility model is also:
Described illumination control circuit comprises mu balanced circuit, light-operated circuit; Described illuminator comprises LED group and resistance R4, triode BG2;
Described mu balanced circuit comprises rectification chip IC1, resistance R1 ~ R3, electric capacity C1 and voltage-stabiliser tube W1; Described light-operated circuit comprises resistance R5 ~ R7, photo resistance R8, optocoupler IC2, voltage-stabiliser tube W2 and triode BG1;
Two inputs of described rectification chip IC1 connect mains ac power supply, and the first end of described rectification chip IC1 is connected second end of rectification chip IC1 and ground connection by resistance R1, resistance R2 successively with electric capacity C1; The negative pole of described voltage-stabiliser tube W1 is connected between described resistance R2 and electric capacity C1, and the positive pole of voltage-stabiliser tube W1 connects second end of rectification chip IC1; One end of described resistance R3 is connected between described resistance R2 and electric capacity C1, the base stage of the other end connecting triode BG1 of resistance R3;
The base stage of one end connecting triode BG1 of described resistance R5, the other end of resistance R5 connects second end of rectification chip IC1 by photo resistance R8; The emitter stage of triode BG1 connects second end of rectification chip IC1; The pin 1 of optocoupler IC2 and pin 4 are all connected between described resistance R1 and resistance R4, and the pin 2 of described optocoupler IC2 passes through the colelctor electrode of described resistance R6 connecting triode BG1; The pin 3 of described optocoupler IC2 connects the negative pole of voltage-stabiliser tube W2 by described resistance R7, the positive pole of described voltage-stabiliser tube W2 connects second end of rectification chip IC1;
The base stage of described triode BG2 connects the negative pole of voltage-stabiliser tube W2, the emitter stage of triode BG2 connects second end of rectification chip IC1, the colelctor electrode of described triode BG2 connects the negative pole of LED group, and the positive pole of described LED group passes through the first end of resistance R4 rectification chip IC1.
Described illumination control circuit comprises Voltage stabilizing module, bistable circuit, brilliance control and delay circuit; Described illuminator comprises constant-current source IC34, LED group, resistance R36, triode BG31 and voltage-stabiliser tube W32;
Described Voltage stabilizing module comprises rectification chip IC31, electric capacity C31, voltage-stabiliser tube W31 and resistance R31;
Described bistable circuit comprises bistable state chip IC 32, electric capacity C32, resistance R32, electric capacity C33, diode D31 and relay J;
Described brilliance control and delay circuit comprise K switch 1, K switch 2, electric capacity C34, diode D32, resistance R34, voltage stabilizing chip IC 33 and resistance R35.
Compared with the prior art, the utility model beneficial effect is embodied in:
Intelligent power-saving street lamp of the present utility model, comprise shell, the lower surface of described shell is provided with opening, and be provided with an illuminator and one in the inner chamber of described shell for controlling the illumination control circuit of the switch of illuminator, the light-emitting area of described illuminator is exposed from described opening part; On the housing, one is provided with for gathering the light-operated probe of the brightness of external ambient light; The switch of described illumination control circuit illuminator according to external ambient light brilliance control and brightness of illumination.
Intelligent power-saving street lamp of the present utility model, has following feature:
(1) production cost is low;
(2) circuit board, illuminator, control electronic circuitry design are integrated, adopt paster production technology to make;
(3) automatically control reliably, luminosity electro-optical efficiency is up to 92%;
(4) power savings is obvious, turns on light, turns off the light without the need to manual operation;
(5) lamp luminescence body is without the need to separately establishing driving power.Intelligent power-saving street lamp of the present utility model, also by increasing LED number, can produce the light fixture of various power brightness.
Be arranged on by illumination control circuit within lamp body shell, its switch only controls by environmental light brightness, without the need to arranging power switch again, and also wireless circumscripted power line.During maintenance, only lamp need be pulled down, just can keep in repair or change damage parts, the maintenance maintenance of light fixture is very convenient.
Intelligent power-saving street lamp of the present utility model, have by external ambient light brilliance control illumination, turn on light turn off the light, economize on electricity low without the need to manual operation, production cost, install and the advantage such as maintenance maintenance is convenient.
Accompanying drawing explanation
Fig. 1 is the outline drawing of intelligent power-saving street lamp of the present utility model.
Fig. 2 is the circuit diagram of the illumination control circuit of an embodiment of intelligent power-saving street lamp of the present utility model.
Fig. 3 is the circuit diagram of the illumination control circuit of another embodiment of intelligent power-saving street lamp of the present utility model.
Below by way of detailed description of the invention, and the utility model is described in further detail by reference to the accompanying drawings.
Label in accompanying drawing 1-3: 1 shell, 2 illuminators, 3 light-operated probes.
Detailed description of the invention
See accompanying drawing 1 ~ accompanying drawing 3, intelligent power-saving street lamp of the present utility model, comprise shell 1, the lower surface of described shell 1 is provided with opening, be provided with an illuminator 2 and one in the inner chamber of described shell 1 for controlling the illumination control circuit of the switch of illuminator 2, the light-emitting area of described illuminator 2 is exposed from the opening of described shell 1; On described shell 1, be provided with one for gathering the light-operated probe 3 of the brightness of external ambient light; The switch of described illumination control circuit illuminator 2 according to external ambient light brilliance control throws light on.
Intelligent power-saving street lamp of the present utility model, controls the illumination of illuminator by the light-operated probe of illumination control circuit.When light-operated probe detects environmental light brightness lower than predetermined luminance, namely opening by illumination control circuit, connected by the power supply of illuminator, light the LED of illuminator, is the illuminations such as road, garden and view.
During concrete enforcement, illuminator and illumination control circuit are adopted paster production technology, and Design Orientation is on same printed circuit board.Described illuminator and illumination control circuit are arranged among casing of street lamp, and light fixture profile is tabular, and control signal adopts natural daylight, illumination of automatically turning on light when natural light brightness is lower.The utility model LED street lamp, be applicable to cities and towns, community, park illumination, rural area illumination, illuminator level 6-18 rice, to have a lot of social connections the road lighting of 7-15 rice, turn on light, turn off the light without the need to labor management, there is production cost easy to install low, intelligence grade advantages of higher, contributes to popularizing of LED street lamp.
Described illumination control circuit comprises mu balanced circuit, light-operated circuit; Described illuminator comprises LED group and resistance R4, triode BG2;
Described mu balanced circuit comprises rectification chip IC1, resistance R1 ~ R3, electric capacity C1 and voltage-stabiliser tube W1; Described light-operated circuit comprises resistance R5 ~ R7, photo resistance R8, optocoupler IC2, voltage-stabiliser tube W2 and triode BG1;
Two inputs of described rectification chip IC1 connect mains ac power supply, and the first end of described rectification chip IC1 is connected second end of rectification chip IC1 and ground connection by resistance R1, resistance R2 successively with electric capacity C1; The negative pole of described voltage-stabiliser tube W1 is connected between described resistance R2 and electric capacity C1, and the positive pole of voltage-stabiliser tube W1 connects second end of rectification chip IC1; One end of described resistance R3 is connected between described resistance R2 and electric capacity C1, the base stage of the other end connecting triode BG1 of resistance R3;
The base stage of one end connecting triode BG1 of described resistance R5, the other end of resistance R5 connects second end of rectification chip IC1 by photo resistance R8; The emitter stage of triode BG1 connects second end of rectification chip IC1; The pin 1 of optocoupler IC2 and pin 4 are all connected between described resistance R1 and resistance R4, and the pin 2 of described optocoupler IC2 passes through the colelctor electrode of described resistance R6 connecting triode BG1; The pin 3 of described optocoupler IC2 connects the negative pole of voltage-stabiliser tube W2 by described resistance R7, the positive pole of described voltage-stabiliser tube W2 connects second end of rectification chip IC1;
The base stage of described triode BG2 connects the negative pole of voltage-stabiliser tube W2, the emitter stage of triode BG2 connects second end of rectification chip IC1, the colelctor electrode of described triode BG2 connects the negative pole of LED group, and the positive pole of described LED group passes through the first end of resistance R4 rectification chip IC1.
As Fig. 2, be the illumination control circuit of an embodiment of the present utility model and the circuit diagram of luminophor circuit, the connection of each components and parts as shown in Figure 2.Optocoupler IC2 is PC817.During concrete enforcement, illumination control circuit, illuminator are arranged on same circuit board.The LED group of illuminator is exposed to throw light on from the opening part of shell.Illuminator as Fig. 2 comprises 6 LED, two LED strip connection formations lamp string, three lamp string formations parallel with one another illuminator.This illumination control circuit, various performing an action is completed automatically by built-in circuit, and controls by natural daylight, without the need to manual operation.When external environment condition brightness is lower, illumination control circuit controls light automatically, provides illumination.Photo resistance R8 stretches out from light-operated probe 3, for detecting external ambient light, illumination control circuit can environmentally be controlled by the light switch of light to illuminator.
Described illumination control circuit comprises Voltage stabilizing module, bistable circuit, brilliance control and delay circuit; Described illuminator comprises constant-current source IC34, LED group, resistance R36, triode BG31 and voltage-stabiliser tube W32;
Described Voltage stabilizing module comprises rectification chip IC31, electric capacity C31, voltage-stabiliser tube W31 and resistance R31;
Described bistable circuit comprises bistable state chip IC 32, electric capacity C32, resistance R32, electric capacity C33, diode D31 and relay J;
Described brilliance control and delay circuit comprise K switch 1, K switch 2, electric capacity C34, diode D32, resistance R34, voltage stabilizing chip IC 33 and resistance R35.
As Fig. 3, be the circuit diagram of another embodiment, the connection of each components and parts as shown in Figure 3.LED group as the illuminator of Fig. 3 comprises 6 LED, 3 LED strip connection formations lamp string, 2 lamp string formations parallel with one another illuminator.Photo resistance R33 stretches out from light-operated probe 3, for detecting external ambient light, illumination control circuit can environmentally be controlled by the brightness of illumination of light to illuminator.
Street lamp in the embodiment of Fig. 3, from, when pedestrian's vehicle sight line is bad, roads light can automatically for road pedestrian vehicle provides large brightness lighting 6-7 hour, namely to the 1-2 o'clock late into the night on the same day at 6-7 o'clock in the afternoon every day.Road pedestrian vehicle after midnight seldom time, light fixture aims at automatically partly opens illuminating energy-saving state, and brightness can set, electric saving illumination state, always remain to second day early 6-7 point.When second day sun rises, Pedestrians and vehicles is not when needs throw light on, and light fixture is with the irradiation of natural daylight, and the automatic powered-down of light fixture stops the illumination of a day to complete circulation in a day.Within second day, turn on light, repeat first time bright light condition, realize the object of illuminating energy-saving at times, realize like this during this task.
In Fig. 3, IC31, R31, C31, W31 are by voltage stabilization at 12V, obtain level and smooth DC voltage, as the operating voltage of IC32.In Fig. 3, IC32 is bistable state chip, and photo resistance R33 and resistance R32 form bleeder circuit, and the 2. pin of IC32 6. pin is connected on dividing point.Photo resistance on daytime R33 is low resistive state dividing point electricity by illumination is high potential.When 6. pin voltage is at 2/3rds voltage for IC32, IC32 bistable circuit output 3. pin is electronegative potential, and relay J does not work, and rear class delay circuit and each assembly that throws light on are because quitting work without electricity.When the same day, dimmed R33 can not get illumination, R33 is high-impedance state, now dividing point be electronegative potential IC32 2. pin current potential when 1/3rd supply voltages, bistable circuit resets, I, the 3. pin of 32 exports high potential, and relay J obtains electric adhesive, its normally opened contact JK-1, JK-2 closing of contact, for delay lighting circuit is powered.Diode D31 is connected in parallel on relay coil two ends, can protect IC32 excessive pressure damages.After relay J, the adhesive of JK-2 contact, 12V voltage adds on IC32 delay circuit, IC32 2. pin and 6. pin change high potential into, 3. the pin of IC32 is electronegative potential, BG31 conducting, electric current provides full voltage through the JK-1 of IC33, relay for LED 1-LED6 assembly, sends floodlighting.Now capacitor C34, R32 charges to C34, IC32 2. pin when 6. 2/3rds voltage is down in underfooting, 3. IC32 becomes high potential, and BG31 dead electricity is closed, and LED1-LED6 light emitting diode supply voltage declines through R36 brightness, electric saving illumination state changed into by light fixture, is maintained to bistable state state and changes.As shown in Figure 3, described IC31, C31, W31, R31 constitute the Voltage stabilizing module controlling light fixture; Described IC32, C32, R32, C33, D31, J constitute the bistable circuit that state of turning on light controls; Described K1, K2, C34, D32, R34, IC33, R35 constitute the brilliance control and delay circuit that change lamp brightness; Described BG31, W32, R36, LED1-LED6, IC34 constitute LED illuminator.In Fig. 3, each electronic component and each electronic component of light emitting diode all adopt surface mount elements, are positioned on same printed circuit board by paster production technology, and its feature production technology is advanced, and production cost is low, and integrated design adapts to batch production.
Intelligent power-saving street lamp of the present utility model, for lamp on daytime do not work, the self-evident intelligent road lamp without the need to behavior adjustment management of lamp at night, described illuminator selects many standards 2835 type LED light emitting diode.Many LED can connect, can be in parallel, can series-parallel connection, form combined LED group, to provide the illumination of different brightness demand according to specific requirement.During concrete enforcement, as required, permutation and combination can be carried out to LED.
Two kinds of illumination control circuits of the present utility model, first embodiment can realize surround lighting and control illumination, and second embodiment not only can realize surround lighting and control illumination, can also realize timesharing change brightness and throw light under the control of surround lighting.
Second embodiment, can provide different luminosity at times, saves power consumption obvious, single spur track lamp Automated condtrol.Light fixture is suitable for the electric saving illumination needing illumination place the nights such as town region, villages and towns in rural areas, park, public arena, and production cost is low, not higher than 200 yuan.Lighting power supply is without the need to labor management, and the special rural area, town region that adapts to promotes the popularization use.
Each electronic components adopt paster production technology, the integrated design of electrical source luminescent body.It is characterized in that LED intelligent road lamp control circuit is when collecting natural daylight, lighting automatic distinguishing, when natural daylight does not reach illumination, light fixture connects mains lighting supply automatically, this switching process is without the need to manual control, above-mentioned light fixture is bright to be completed by light fixture built-in electronic circuit automatically with extinguishing process, and run through actual use for many years and confirm that the existing control circuit working stability announced reliably is suitable for, cost is low.A set of brightness is equivalent to 400-2000W incandescent lamp, and light fixture production cost is no more than hundreds of unit.The utility model has the advantage of: modern design, control circuit are simple and reliable, lamp light source adopts paster processing technology, LED light source without the need to configure dedicated driver, under the condition not increasing production cost, light fixture intelligent energy-saving control effects can be realized, therefore be very conducive to promoting the penetration and promotion of road lighting industry.
Intelligent power-saving street lamp of the present utility model, has following feature: (1) production cost is low; (2) circuit board, illuminator, control electronic circuitry design are integrated, adopt paster production technology to make; (3) automatically control reliably, luminosity electro-optical efficiency is up to 92%; (4) power savings is obvious, turns on light, turns off the light without the need to manual operation; (5) lamp luminescence body is without the need to separately establishing driving power.Intelligent power-saving street lamp of the present utility model, also by increasing LED number, can produce the light fixture of various power brightness.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. intelligent power-saving street lamp, it is characterized in that, comprise shell (1), the lower surface of described shell (1) is provided with opening, be provided with an illuminator (2) and one in the inner chamber of described shell (1) for controlling the illumination control circuit of the switch of illuminator (2), the light-emitting area of described illuminator (2) is exposed from the opening of described shell (1); On described shell (1), be provided with one for gathering the light-operated probe (3) of the brightness of external ambient light; The switch of described illumination control circuit illuminator (2) according to external ambient light brilliance control throws light on.
2. intelligent power-saving street lamp according to claim 1, is characterized in that, described illumination control circuit comprises mu balanced circuit, light-operated circuit; Described illuminator comprises LED group and resistance R4, triode BG2;
Described mu balanced circuit comprises rectification chip IC1, resistance R1 ~ R3, electric capacity C1 and voltage-stabiliser tube W1; Described light-operated circuit comprises resistance R5 ~ R7, photo resistance R8, optocoupler IC2, voltage-stabiliser tube W2 and triode BG1;
Two inputs of described rectification chip IC1 connect mains ac power supply, and the first end of described rectification chip IC1 is connected second end of rectification chip IC1 and ground connection by resistance R1, resistance R2 successively with electric capacity C1; The negative pole of described voltage-stabiliser tube W1 is connected between described resistance R2 and electric capacity C1, and the positive pole of voltage-stabiliser tube W1 connects second end of rectification chip IC1; One end of described resistance R3 is connected between described resistance R2 and electric capacity C1, the base stage of the other end connecting triode BG1 of resistance R3;
The base stage of one end connecting triode BG1 of described resistance R5, the other end of resistance R5 connects second end of rectification chip IC1 by photo resistance R8; The emitter stage of triode BG1 connects second end of rectification chip IC1; The pin 1 of optocoupler IC2 and pin 4 are all connected between described resistance R1 and resistance R4, and the pin 2 of described optocoupler IC2 passes through the colelctor electrode of described resistance R6 connecting triode BG1; The pin 3 of described optocoupler IC2 connects the negative pole of voltage-stabiliser tube W2 by described resistance R7, the positive pole of described voltage-stabiliser tube W2 connects second end of rectification chip IC1;
The base stage of described triode BG2 connects the negative pole of voltage-stabiliser tube W2, the emitter stage of triode BG2 connects second end of rectification chip IC1, the colelctor electrode of described triode BG2 connects the negative pole of LED group, and the positive pole of described LED group passes through the first end of resistance R4 rectification chip IC1.
3. intelligent power-saving street lamp according to claim 1, is characterized in that, described illumination control circuit comprises Voltage stabilizing module, bistable circuit, brilliance control and delay circuit; Described illuminator comprises constant-current source IC34, LED group, resistance R36, triode BG31 and voltage-stabiliser tube W32;
Described Voltage stabilizing module comprises rectification chip IC31, electric capacity C31, voltage-stabiliser tube W31 and resistance R31;
Described bistable circuit comprises bistable state chip IC 32, electric capacity C32, resistance R32, electric capacity C33, diode D31 and relay J;
Described brilliance control and delay circuit comprise K switch 1, K switch 2, electric capacity C34, diode D32, resistance R34, voltage stabilizing chip IC 33 and resistance R35.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520300569.XU CN204554564U (en) | 2015-05-11 | 2015-05-11 | Intelligent power-saving street lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520300569.XU CN204554564U (en) | 2015-05-11 | 2015-05-11 | Intelligent power-saving street lamp |
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| CN204554564U true CN204554564U (en) | 2015-08-12 |
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| CN201520300569.XU Expired - Fee Related CN204554564U (en) | 2015-05-11 | 2015-05-11 | Intelligent power-saving street lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698093A (en) * | 2016-03-16 | 2016-06-22 | 深圳市哈工大交通电子技术有限公司 | Streetlamp with intelligent visual function and control method thereof |
| CN106545809A (en) * | 2016-10-31 | 2017-03-29 | 沈阳建筑大学 | With the LED electricity-saving lamps that fractal structure classification is lighted |
-
2015
- 2015-05-11 CN CN201520300569.XU patent/CN204554564U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698093A (en) * | 2016-03-16 | 2016-06-22 | 深圳市哈工大交通电子技术有限公司 | Streetlamp with intelligent visual function and control method thereof |
| CN106545809A (en) * | 2016-10-31 | 2017-03-29 | 沈阳建筑大学 | With the LED electricity-saving lamps that fractal structure classification is lighted |
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