CN104427692B - A kind of photocontrol automatic switching circuit and lamps and lanterns - Google Patents
A kind of photocontrol automatic switching circuit and lamps and lanterns Download PDFInfo
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- CN104427692B CN104427692B CN201310375540.3A CN201310375540A CN104427692B CN 104427692 B CN104427692 B CN 104427692B CN 201310375540 A CN201310375540 A CN 201310375540A CN 104427692 B CN104427692 B CN 104427692B
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Abstract
The embodiment of the invention discloses a kind of photocontrol automatic switching circuit and lamps and lanterns, including transformer T1, rectifier bridge DB, capacitor C1, photo resistance R1, resistance POT, voltage-stabiliser tube ZD1, Darlington transistor DAR, relay K；The both ends of primary coil in transformer T1 are connected to power supply, the both ends of secondary coil in transformer T1 are connect with the input terminal of rectifier bridge DB, the output end of rectifier bridge DB is connect with the cathode of the anode of capacitor C1 and capacitor C1 respectively, the anode of capacitor C1 is connect with one end of relay K, the cathode of capacitor C1 is connect with one end of photo resistance R1, the anode of voltage-stabiliser tube ZD1 is connect with the base stage of Darlington transistor DAR, the radiation pole of Darlington transistor DAR is connect with one end of photo resistance R1, and the collector of Darlington transistor DAR is connect with the other end of relay K.The embodiment of the present invention, which has to simply implement, lights load light source by judging automatically external light source strength control, and component is few, and structure is simple, advantage low in cost.
Description
Technical field
The present invention relates to illuminator control field more particularly to a kind of photocontrol automatic switching circuits and lamps and lanterns.
Background technique
Electric energy and our life are closely bound up, and electric energy is widely used in power, illumination, metallurgy, chemistry, weaving, logical
The every field such as letter, broadcast.In order to reduce the consumption of electric energy, especially in lighting area, the prior art, which proposes, utilizes illumination
Intensity starting to control a little as lamps and lanterns, when realizing that light is brighter, lamps and lanterns are automatically closed, and when evening dark, automatically turn on lamp
The control of tool, entire circuit are made of components such as multiple rectifier diodes, electronic switch integrated circuit, multiple resistance, therefore
With occupied space is big, structure is complicated, the shortcomings such as with high costs.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that a kind of photocontrol automatic switching circuit and lamps and lanterns are provided,
It can simply implement and light load light source by judging automatically external light source strength control.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of photocontrol automatic switching circuits, including become
Depressor T1, rectifier bridge DB, capacitor C1, photo resistance R1, resistance POT, voltage-stabiliser tube ZD1, Darlington transistor DAR, relay K, in which:
The both ends of primary coil in transformer T1 are connected to power supply, the both ends of the secondary coil in transformer T1 and rectification
The input terminal of bridge DB connects, and the output end of rectifier bridge DB is connect with the cathode of the anode of capacitor C1 and capacitor C1 respectively, capacitor
The anode of C1 is connect with one end of one end of resistance POT and relay K respectively, the cathode of capacitor C1 and the one of photo resistance R1
End connection, the other end of resistance POT are connect with the cathode of the other end of photo resistance R1 and voltage-stabiliser tube ZD1 respectively, voltage-stabiliser tube
The anode of ZD1 is connect with the base stage of Darlington transistor DAR, and the radiation pole of Darlington transistor DAR is connect with one end of photo resistance R1, is reached
The collector of Islington pipe DAR is connect with the other end of relay K, and the one of one end of the contact K-1 in relay K and load light source
End connects, and the other end of the contact K-1 in relay K is connect with one end of the primary coil in transformer T1；
One end of load light source is connect with one end of the contact K-1 in relay K, the other end and transformer of load light source
The other end of primary coil in T1 connects.
Specifically, the Darlington transistor DAR includes:
Triode Q1 and triode Q2;
The radiation pole of triode Q1 is connect with the base stage of triode Q2, the collector of triode Q1 and the current collection of triode Q2
Pole connection；
The base stage of triode Q1 is the base stage of Darlington transistor DAR, and the radiation pole of triode Q2 is the radiation of Darlington transistor DAR
Pole, the tie point of the collector of the collector and triode Q2 of triode Q1 are the collector of Darlington transistor DAR.
Wherein, the triode Q1 and triode Q2 is NPN type triode.
Further, the resistance POT is adjustable resistance.
It is further preferred that the circuit further includes capacitor C2, one end of capacitor C2 and the other end of photo resistance R1 connect
It connects, the other end of capacitor C2 is connect with one end of photo resistance R1.
It is further preferred that the circuit further includes diode D1, the cathode of diode D1 and one end of relay K connect
It connects, the anode of diode D1 is connect with the other end of relay K.
It is further preferred that the circuit further includes resistance R2, one end of resistance R2 and the other end of photo resistance R1 connect
It connects, the other end of resistance R2 is connect with the cathode of voltage-stabiliser tube ZD1.
Further, when the intensity of illumination on photo resistance R1 is greater than the illumination determined according to the resistance value of current resistance POT
When critical strength, the voltage at the both ends the resistance R1 is less than preset threshold, then voltage-stabiliser tube ZD1 is in off state, Darlington
Pipe DAR stops working, and relay K stops working, and the contact K-1 in relay K is disconnected, and load light source extinguishes.
Further, when the intensity of illumination on photo resistance R1 is not more than the light determined according to the resistance value of current resistance POT
When according to critical strength, the voltage at the both ends the resistance R1 is not less than preset threshold, then voltage-stabiliser tube ZD1 is connected, Darlington transistor DAR
Work, relay K work, and the contact K-1 closure in relay K, load light source is lighted.
Correspondingly, the embodiment of the invention also provides a kind of lamps and lanterns, and one including the contact K-1 being connected in relay K
The photocontrol automatic switching circuit of the other end of end and the primary coil in transformer T1.
The implementation of the embodiments of the present invention has the following beneficial effects: the embodiment of the present invention is by judging automatically exterior light source strength
Load light source is lighted in degree control, and the component of the photocontrol automatic switching circuit in the present invention is few, and structure is simple, at low cost
It is honest and clean.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of schematic diagram of photocontrol automatic switching circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of lamps and lanterns provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of photocontrol automatic switching circuit and lamps and lanterns, can simply implement outer by judging automatically
Portion's light source intensity control lights load light source.It is described in detail separately below.
Referring to FIG. 1, being a kind of schematic diagram of photocontrol automatic switching circuit provided in an embodiment of the present invention, the circuit
10 include: transformer T1, rectifier bridge DB, capacitor C1, photo resistance R1, resistance POT, voltage-stabiliser tube ZD1, Darlington transistor DAR, relay
Device K；
The both ends of primary coil in transformer T1 are connected to power supply, the both ends of the secondary coil in transformer T1 and rectification
The input terminal of bridge DB connects, and the output end of rectifier bridge DB is connect with the cathode of the anode of capacitor C1 and capacitor C1 respectively, capacitor
The anode of C1 is connect with one end of one end of resistance POT and relay K respectively, the cathode of capacitor C1 and the one of photo resistance R1
End connection, the other end of resistance POT are connect with the cathode of the other end of photo resistance R1 and voltage-stabiliser tube ZD1 respectively, voltage-stabiliser tube
The anode of ZD1 is connect with the base stage of Darlington transistor DAR, and the radiation pole of Darlington transistor DAR is connect with one end of photo resistance R1, is reached
The collector of Islington pipe DAR is connect with the other end of relay K, and the one of one end of the contact K-1 in relay K and load light source
End connects, and the other end of the contact K-1 in relay K is connect with one end of the primary coil in transformer T1；
One end of load light source is connect with one end of the contact K-1 in relay K, the other end and transformer of load light source
The other end of primary coil in T1 connects.
Further, the resistance POT is adjustable resistance.
Further, Darlington transistor DAR includes triode Q1 and triode Q2, in which:
The radiation pole of triode Q1 is connect with the base stage of triode Q2, the collector of triode Q1 and the current collection of triode Q2
Pole connection；
The base stage of triode Q1 is the base stage of Darlington transistor DAR, and the radiation pole of triode Q2 is the radiation of Darlington transistor DAR
Pole, the tie point of the collector of the collector and triode Q2 of triode Q1 are the collector of Darlington transistor DAR.
Further, the triode Q1 and triode Q2 is NPN type triode.
It is further preferred that on the basis of the above embodiments, referring to Fig. 1, above-mentioned photocontrol automatic switching circuit 10 is also
May include capacitor C2, wherein one end of capacitor C2 is connect with the other end of photo resistance R1, the other end of capacitor C2 with it is photosensitive
One end of resistance R1 connects.Here the intensity of illumination on photo resistance R1 is equal to the light determined according to the resistance value of current resistance POT
When according to critical strength, the spread of voltage of photo resistance R1, capacitor C2 plays the role of voltage regulation filtering at this time.
It is further preferred that on the basis of the above embodiments, referring to Fig. 1, above-mentioned photocontrol automatic switching circuit 10 is also
May include di-cap D1, wherein the cathode of diode D1 is connect with one end of relay K, diode D1 anode with
The other end of relay K connects.Here relay K in the case of a discharge, the transmission of the voltage and electric current at the both ends relay K
Direction can be reversed, and diode D1 can prevent from burning out the photocontrol when transmission direction of relay K voltage and electric current is reversed at this time
Component in automatic switching circuit plays the role of protecting all components in its circuit.
It is further preferred that on the basis of the above embodiments, referring to Fig. 1, above-mentioned photocontrol automatic switching circuit 10 is also
It may include resistance R2, wherein one end of resistance R2 is connect with the other end of photo resistance R1, the other end of resistance R2 and pressure stabilizing
The cathode of pipe ZD1 connects.Here voltage-stabiliser tube has a minimum electric current of voltage regulation pressure and maximum stable electric current, if electric current is less than minimum
Voltage of voltage regulation is just with this not pressure stabilizing；If electric current is greater than maximum stable electric current, voltage-stabiliser tube will be damaged, therefore in its circuit
As soon as voltage-stabiliser tube need to connect, resistance carrys out current limliting, and resistance R2 plays the role of current limliting.
Below with reference to Fig. 1, a kind of working principle of photocontrol automatic switching circuit 10 provided by the invention is specifically described.
Input voltage in power supply is transformed into DC voltage by transformer T1, and correspondingly, electric current is become by rectifier bridge DB
Change DC current into, the DC voltage and DC current are by obtaining control power supply, the wherein control after capacitor C1 voltage regulation filtering
Power supply processed is used to give rear class control component power supply.
When the intensity of illumination on photo resistance R1 is greater than the intensity of illumination critical value determined according to the resistance value of current resistance POT
When, the resistance of photo resistance R1 reduces rapidly, and so that the voltage at the both ends the resistance R1 is less than preset threshold, then at voltage-stabiliser tube ZD1
In off state, Darlington transistor DAR stops working, and relay K stops working, and the contact K-1 in relay K is disconnected, and loads light
Source will extinguish.
When the intensity of illumination on photo resistance R1 is critical no more than the intensity of illumination determined according to the resistance value of current resistance POT
When value, the resistance of photo resistance R1 is increased rapidly, so that the voltage at the both ends the resistance R1 is reached preset threshold, then voltage-stabiliser tube ZD1
Conducting, Darlington transistor DAR work, relay K work, and the contact K-1 closure in relay K, load light source will be lighted.
Wherein it is possible to by the resistance for needing to adjust resistance POT, so that after the resistance of setting resistance POT, when the light
When intensity of illumination on quick resistance R1 is greater than according to the resistance value of current resistance POT determining intensity of illumination critical value, photo resistance
The resistance value of R1 declines rapidly, so that the voltage at the both ends resistance R1 is less than preset threshold, then voltage-stabiliser tube ZD1 is in off state, Da Lin
The pipe DAR that pauses stops working, and relay K stops working, and the contact K-1 in relay K is disconnected, and load light source will extinguish；Conversely,
When the intensity of illumination on the photo resistance R1 is not more than the intensity of illumination critical value determined according to the resistance value of current resistance POT
When, the voltage at the both ends photo resistance R1 reaches preset threshold, then voltage-stabiliser tube ZD1 is in the conductive state, Darlington transistor DAR work,
Relay K works, and the contact K-1 closure in relay K, load light source will be lighted.
Wherein, preset threshold can be set as 0.7V.When the intensity of illumination on photo resistance R1 is not more than according to current electricity
When the intensity of illumination critical value that the resistance value of resistance POT determines, the resistance of photo resistance R1 is increased rapidly, makes the both ends photo resistance R1
Voltage reaches 0.7V, then voltage-stabiliser tube ZD1 is connected, Darlington transistor DAR work, relay K work, and the contact K-1 in relay K is closed
It closes, load light source is lighted；When the intensity of illumination on photo resistance R1 is strong greater than the illumination determined according to the resistance value of current resistance POT
When spending critical value, the resistance of photo resistance R1 is reduced rapidly, and so that the voltage at the both ends photo resistance R1 is less than 0.7V, then voltage-stabiliser tube
ZD1 is in off state, and Darlington transistor DAR stops working, and relay K stops working, and the contact K-1 in relay K is disconnected, and bears
Light source is carried to extinguish.
Fig. 2 is referred to, is a kind of structural schematic diagram of lamps and lanterns provided in an embodiment of the present invention, the lamps and lanterns include power supply
20, lamp 30, the photocontrol automatic switching circuit 10 being connected between power supply 20 and lamp 30.
The power supply 20 can use AC power source, can also use DC power supply, power supply 20 use voltage rating and
Rated current is depending on the type of lamp 30 and number.For example, power supply 20 should be using positive electricity when lamp 30 is single white LED lamp
Pressure is 3.0-3.6V or so, and typical threshold voltage is 3.3V, electric current 20mA.When the forward voltage for being added on the both ends LED is more than 3.6V
Afterwards, the increase of forward voltage very little, and the forward current of LED is possible to increase at double, keeps LED illuminator temperature rise too fast, from
And LED light is accelerated to decay, make the lost of life of LED, LED is even burnt out when serious.According to the voltage of LED, curent change characteristic,
The design of power supply 20 is proposed to be strict with.
Lamp 30 in the lamps and lanterns can be equivalent in the schematic diagram of the photocontrol automatic switching circuit in above-described embodiment
Load light source, in the lamps and lanterns in addition to use LED light as load light source other than, can also be made with other kinds of headlamp
For load light source.
The circuit structure of photocontrol automatic switching circuit 10 in the lamps and lanterns is referred to Fig. 1, and which is not described herein again.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (8)
1. a kind of photocontrol automatic switching circuit characterized by comprising
Transformer T1, rectifier bridge DB, capacitor C1, photo resistance R1, resistance POT, voltage-stabiliser tube ZD1, Darlington transistor DAR, relay
K；
The both ends of primary coil in transformer T1 are connected to power supply, the both ends of the secondary coil in transformer T1 and rectifier bridge DB
Input terminal connection, the output end of rectifier bridge DB connect with the cathode of the anode of capacitor C1 and capacitor C1 respectively, capacitor C1's
Anode is connect with one end of one end of resistance POT and relay K respectively, and the cathode of capacitor C1 and one end of photo resistance R1 connect
It connects, the other end of resistance POT is connect with the cathode of the other end of photo resistance R1 and voltage-stabiliser tube ZD1 respectively, voltage-stabiliser tube ZD1's
Anode is connect with the base stage of Darlington transistor DAR, and the radiation pole of Darlington transistor DAR is connect with one end of photo resistance R1, Darlington
The collector of pipe DAR is connect with the other end of relay K, and one end of the contact K-1 in relay K and one end of load light source connect
It connects, the other end of the contact K-1 in relay K is connect with one end of the primary coil in transformer T1；
The other end of load light source is connect with the other end of the primary coil in transformer T1.
2. photocontrol automatic switching circuit as described in claim 1, which is characterized in that the circuit further includes capacitor C2, electricity
The one end for holding C2 is connect with the other end of photo resistance R1, and the other end of capacitor C2 is connect with one end of photo resistance R1.
3. photocontrol automatic switching circuit as described in claim 1, which is characterized in that the circuit further includes diode D1,
The cathode of diode D1 is connect with one end of relay K, and the anode of diode D1 is connect with the other end of relay K.
4. photocontrol automatic switching circuit as described in claim 1, which is characterized in that the circuit further includes resistance R2, electricity
One end of resistance R2 is connect with the other end of photo resistance R1, and the other end of resistance R2 is connect with the cathode of voltage-stabiliser tube ZD1.
5. photocontrol automatic switching circuit as described in claim 1, which is characterized in that the Darlington transistor DAR includes:
Triode Q1 and triode Q2；
The radiation pole of triode Q1 is connect with the base stage of triode Q2, and the collector of triode Q1 and the collector of triode Q2 connect
It connects；
The base stage of triode Q1 is the base stage of Darlington transistor DAR, and the radiation pole of triode Q2 is the radiation pole of Darlington transistor DAR,
The tie point of the collector of the collector and triode Q2 of triode Q1 is the collector of Darlington transistor DAR.
6. photocontrol automatic switching circuit as claimed in claim 5, which is characterized in that the triode Q1 and triode Q2 are equal
For NPN type triode.
7. photocontrol automatic switching circuit as described in claim 1, which is characterized in that the resistance POT is adjustable resistance.
8. a kind of lamps and lanterns, which is characterized in that including the described in any item photocontrol automatic switching circuits of claim 1~7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310375540.3A CN104427692B (en) | 2013-08-26 | 2013-08-26 | A kind of photocontrol automatic switching circuit and lamps and lanterns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310375540.3A CN104427692B (en) | 2013-08-26 | 2013-08-26 | A kind of photocontrol automatic switching circuit and lamps and lanterns |
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| Publication Number | Publication Date |
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| CN104427692A CN104427692A (en) | 2015-03-18 |
| CN104427692B true CN104427692B (en) | 2019-02-05 |
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| CN201310375540.3A Active CN104427692B (en) | 2013-08-26 | 2013-08-26 | A kind of photocontrol automatic switching circuit and lamps and lanterns |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105430849A (en) * | 2015-12-31 | 2016-03-23 | 天津市光影图腾科技有限公司 | Light-operated automatic switch of solar decorative lamp |
| CN105744701A (en) * | 2016-03-23 | 2016-07-06 | 成都锐奕信息技术有限公司 | Light-controlled streetlamp controller |
| CN105764210A (en) * | 2016-03-23 | 2016-07-13 | 成都锐奕信息技术有限公司 | Street lamp control circuit |
| CN108617064A (en) * | 2018-04-18 | 2018-10-02 | 深圳市全智芯科技有限公司 | Light-operated lamp control circuit and luminance threshold regulate and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2739918Y (en) * | 2004-09-28 | 2005-11-09 | 蔡增金 | Light-operated night lamp |
| CN102752921A (en) * | 2012-06-21 | 2012-10-24 | 叶选锋 | Light-controlled switch |
| CN202603020U (en) * | 2012-06-21 | 2012-12-12 | 叶选锋 | Light-operated switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6969955B2 (en) * | 2004-01-29 | 2005-11-29 | Axis Technologies, Inc. | Method and apparatus for dimming control of electronic ballasts |
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2013
- 2013-08-26 CN CN201310375540.3A patent/CN104427692B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2739918Y (en) * | 2004-09-28 | 2005-11-09 | 蔡增金 | Light-operated night lamp |
| CN102752921A (en) * | 2012-06-21 | 2012-10-24 | 叶选锋 | Light-controlled switch |
| CN202603020U (en) * | 2012-06-21 | 2012-12-12 | 叶选锋 | Light-operated switch |
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| CN104427692A (en) | 2015-03-18 |
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