CN104955243A - Threshold value comparison circuit for energy-saving control of lamp light - Google Patents

Threshold value comparison circuit for energy-saving control of lamp light Download PDF

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Publication number
CN104955243A
CN104955243A CN201510400178.XA CN201510400178A CN104955243A CN 104955243 A CN104955243 A CN 104955243A CN 201510400178 A CN201510400178 A CN 201510400178A CN 104955243 A CN104955243 A CN 104955243A
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CN
China
Prior art keywords
resistance
light intensity
threshold value
comparator
output
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Pending
Application number
CN201510400178.XA
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Chinese (zh)
Inventor
王刚
陈怀之
谢华
聂海涛
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Chengdu Zhenzhong Electric Co Ltd
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Chengdu Zhenzhong Electric Co Ltd
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Priority to CN201510400178.XA priority Critical patent/CN104955243A/en
Publication of CN104955243A publication Critical patent/CN104955243A/en
Pending legal-status Critical Current

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    • 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
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

A threshold value comparison circuit for energy-saving control of lamp light comprises an AD (analog/digital) conversion module, a light intensity upper limit threshold value comparison module and a light intensity lower limit threshold value comparison module, wherein an input end of the AD conversion module is connected with an output end of a photosensitive sensor; an input end of the light intensity upper limit threshold value comparison module and an input end of the light intensity lower limit threshold value comparison module are connected with an output end of the AD conversion module; the light intensity upper limit threshold value comparison module comprises a first voltage division circuit for providing a light intensity upper limit threshold value, a comparator U1A, a triode Q1, a pull-up resistor R6 and a current limit resistor R8; the light intensity lower limit threshold value comparison module comprises a second voltage division circuit for providing a light intensity lower limit threshold value, a comparator U1B, a triode Q2, a pull-up resistor R7 and a current limit resistor R9. According to the threshold value comparison circuit, the light intensity range can be set, an acquired light intensity signal is compared with an upper threshold value and a lower threshold value of the range, whether the light intensity is excessively high or low is judged, an energy-saving control device can automatically adjust light brightness according to light intensity, and the threshold value comparison circuit is energy-saving and environment-friendly.

Description

For the threshold value comparison circuit of light Energy Saving Control
Technical field
The present invention relates to energy-conserving and environment-protective technical field, particularly, relate to a kind of threshold value comparison circuit for light Energy Saving Control.
Background technology
In energy crisis and global warming day by day serious today, green energy conservation has reached whole world common recognition.
Along with the development of modern industry, the demand of people to the energy constantly increases, and non-renewable energy resources are just progressively exhausted, but in daily life, people are very serious to the waste of electric energy.
Illuminating lamp is a kind of conventional power consumption equipment, general illuminating lamp indoor or corridor is bright and clear time light cannot regulate brightness voluntarily, at nobody time, power supply also cannot be closed voluntarily, causes waste of energy serious, has increased the weight of energy burden further.Energy-conservation in order to carry out, propose in prior art and regulate the theory such as brightness, lamp with auto-switch voluntarily, regulate the most basic means of brightness to need the comparison realizing intensity of illumination voluntarily.
Summary of the invention
Object of the present invention is just the shortcoming and defect overcoming above-mentioned prior art, provides a kind of threshold value comparison circuit for light Energy Saving Control, should to support the Energy Saving Control automatically regulating lamplight brightness according to light intensity.
The present invention's adopted technical scheme that solves the problem is:
For the threshold value comparison circuit of light Energy Saving Control, it is characterized in that, comprise AD conversion module, light intensity upper limit threshold comparison module, light intensity lower threshold comparison module, the input of AD conversion module connects the output of light sensor, and light intensity upper limit threshold comparison module is connected with the output of AD conversion module with the input of light intensity lower threshold comparison module;
Described light intensity upper limit threshold comparison module comprises the first bleeder circuit, comparator U1A, triode Q1, pull-up resistor R6 and the current-limiting resistance R8 that provide light intensity upper limit threshold; The output of the in-phase input end connection AD conversion module of comparator U1A, inverting input connect the output of the first bleeder circuit, and the output of comparator U1A is also connected with DC power supply VCC by pull-up resistor R6; The base stage of triode Q1 is connected with the output of comparator U1A, and collector electrode is connected with DC power supply VCC, and emitter connects current-limiting resistance R8;
Described light intensity lower threshold comparison module comprises the second bleeder circuit, comparator U1B, triode Q2, pull-up resistor R7 and the current-limiting resistance R9 that provide light intensity lower threshold; The output of the inverting input connection AD conversion module of comparator U1B, in-phase input end connect the output of the first bleeder circuit, and the output of comparator U1B is also connected with DC power supply VCC by pull-up resistor R7; The base stage of triode Q2 is connected with the output of comparator U1B, collector electrode is connected with DC power supply VCC, and emitter connects current-limiting resistance R9.
As a further improvement on the present invention, described first bleeder circuit is in series by resistance R2, resistance R3, and resistance R2 connects DC power supply VCC, resistance R3 ground connection, and the voltage at resistance R3 two ends is light intensity upper limit threshold; The inverting input of comparator U1A is connected between resistance R2 and resistance R3;
Described second bleeder circuit is in series by resistance R4, resistance R5, and resistance R4 connects DC power supply VCC, resistance R5 ground connection, and the voltage at resistance R5 two ends is light intensity lower threshold; The in-phase input end of comparator U1B is connected between resistance R4 and resistance R5.
Further, described resistance R3 and resistance R4 is variable resistor, and the maximum value of resistance R3 and resistance R4 is 100K Ω, and the resistance of resistance R2 and R5 is 20K Ω.
Further, described triode Q1 is NPN type triode, and triode Q2 is PNP type triode.
Further, the in-phase input end of described comparator U1A and the inverting input of comparator U1B are all also by resistance R1 ground connection.
The invention has the beneficial effects as follows: the threshold value comparison circuit for light Energy Saving Control of the present invention can set suitable intensity of illumination scope, and the upper lower threshold value gathering intensity of illumination signal and intensity of illumination scope is compared, judge that whether intensity of illumination is too high or too low, thus support that energy-saving control device regulates lamplight brightness automatically according to light intensity, energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is circuit block diagram of the present invention;
Fig. 2 is the circuit diagram of light intensity upper limit threshold comparison module, light intensity lower threshold comparison module.
Embodiment
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, for the threshold value comparison circuit of light Energy Saving Control, comprise AD conversion module, light intensity upper limit threshold comparison module, light intensity lower threshold comparison module, the input of AD conversion module connects the output of light sensor, and light intensity upper limit threshold comparison module is connected with the output of AD conversion module with the input of light intensity lower threshold comparison module.
As shown in Figure 2, described light intensity upper limit threshold comparison module comprises the first bleeder circuit, comparator U1A, triode Q1, pull-up resistor R6 and the current-limiting resistance R8 that provide light intensity upper limit threshold;
Described first bleeder circuit is in series by resistance R2, resistance R3, and resistance R2 connects DC power supply VCC, resistance R3 ground connection, and the voltage at resistance R3 two ends is light intensity upper limit threshold, and the tie point between resistance R2 and resistance R3 is the output of the first bleeder circuit;
Output, the inverting input of the in-phase input end connection AD conversion module of comparator U1A are connected between resistance R2 and resistance R3, and the output of comparator U1A is also connected with DC power supply VCC by pull-up resistor R6; The base stage of triode Q1 is connected with the output of comparator U1A, and collector electrode is connected with DC power supply VCC, and emitter connects current-limiting resistance R8.
Described light intensity lower threshold comparison module comprises the second bleeder circuit, comparator U1B, triode Q2, pull-up resistor R7 and the current-limiting resistance R9 that provide light intensity lower threshold;
Described second bleeder circuit is in series by resistance R4, resistance R5, and resistance R4 connects DC power supply VCC, resistance R5 ground connection, and the voltage at resistance R5 two ends is light intensity lower threshold, and the connection of resistance R4 and resistance R5 is the output of the second bleeder circuit;
The inverting input of comparator U1B connects the output of AD conversion module, in-phase input end connects the between resistance R4 and resistance R5, and the output of comparator U1B is also connected with DC power supply VCC by pull-up resistor R7; The base stage of triode Q2 is connected with the output of comparator U1B, collector electrode is connected with DC power supply VCC, and emitter connects current-limiting resistance R9.
The in-phase input end of described comparator U1A and the inverting input of comparator U1B are all also by resistance R1 ground connection.
Light sensor gathers intensity of illumination signal, and the intensity of illumination analog signal of AD conversion module light light sensor collection is converted to digital signal and sends to light intensity upper limit threshold comparison module and light intensity lower threshold comparison module.In general use, light intensity upper limit threshold comparison module is connected with microprocessor with light intensity lower threshold comparison module rear end.When the light intensity signal that the output of AD conversion module exports is greater than voltage on resistance R3 and upper limit threshold, represent that light is too strong, now comparator U1A output HIGH voltage signal is to microprocessor, and intensity of illumination is turned down by Microprocessor S3C44B0X; Otherwise when light intensity signal is less than voltage and the lower threshold at resistance R5 two ends, represent that light is too weak, comparator U1B output HIGH voltage signal is to microprocessor, and intensity of illumination is heightened by Microprocessor S3C44B0X; When light intensity signal is between upper limit threshold and lower threshold, two equal output LOW voltage signals of comparator, microprocessor is without the need to controlling lamplight brightness adjustment.
In the present embodiment, described triode Q1 is NPN type triode, and triode Q2 is PNP type triode, and described resistance R3 and resistance R4 is variable resistor, and maximum value is 100K Ω, and the resistance of resistance R2 and R5 is 20K Ω.During resistance R3 and resistance R4 employing variable resistor, its resistance can adjust, thus can adjust the voltage that R3 and R4 gets, thus changes the voltage at R3 and R5 two ends, i.e. bound threshold value.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as protection scope of the present invention.

Claims (5)

1. for the threshold value comparison circuit of light Energy Saving Control, it is characterized in that, comprise AD conversion module, light intensity upper limit threshold comparison module, light intensity lower threshold comparison module, the input of AD conversion module connects the output of light sensor, and light intensity upper limit threshold comparison module is connected with the output of AD conversion module with the input of light intensity lower threshold comparison module;
Described light intensity upper limit threshold comparison module comprises the first bleeder circuit, comparator U1A, triode Q1, pull-up resistor R6 and the current-limiting resistance R8 that provide light intensity upper limit threshold; The output of the in-phase input end connection AD conversion module of comparator U1A, inverting input connect the output of the first bleeder circuit, and the output of comparator U1A is also connected with DC power supply VCC by pull-up resistor R6; The base stage of triode Q1 is connected with the output of comparator U1A, and collector electrode is connected with DC power supply VCC, and emitter connects current-limiting resistance R8;
Described light intensity lower threshold comparison module comprises the second bleeder circuit, comparator U1B, triode Q2, pull-up resistor R7 and the current-limiting resistance R9 that provide light intensity lower threshold; The output of the inverting input connection AD conversion module of comparator U1B, in-phase input end connect the output of the first bleeder circuit, and the output of comparator U1B is also connected with DC power supply VCC by pull-up resistor R7; The base stage of triode Q2 is connected with the output of comparator U1B, collector electrode is connected with DC power supply VCC, and emitter connects current-limiting resistance R9.
2. the threshold value comparison circuit for light Energy Saving Control according to claim 1, it is characterized in that, described first bleeder circuit is in series by resistance R2, resistance R3, and resistance R2 connects DC power supply VCC, resistance R3 ground connection, the voltage at resistance R3 two ends is light intensity upper limit threshold; The inverting input of comparator U1A is connected between resistance R2 and resistance R3;
Described second bleeder circuit is in series by resistance R4, resistance R5, and resistance R4 connects DC power supply VCC, resistance R5 ground connection, and the voltage at resistance R5 two ends is light intensity lower threshold; The in-phase input end of comparator U1B is connected between resistance R4 and resistance R5.
3. the threshold value comparison circuit for light Energy Saving Control according to claim 2, is characterized in that, described resistance R3 and resistance R4 is variable resistor, and the maximum value of resistance R3 and resistance R4 is 100K Ω, and the resistance of resistance R2 and R5 is 20K Ω.
4. the threshold value comparison circuit for light Energy Saving Control according to claim 1 or 2 or 3, it is characterized in that, described triode Q1 is NPN type triode, triode Q2 is PNP type triode.
5. the threshold value comparison circuit for light Energy Saving Control according to claim 1 or 2 or 3, is characterized in that, the in-phase input end of described comparator U1A and the inverting input of comparator U1B are all also by resistance R1 ground connection.
CN201510400178.XA 2015-07-10 2015-07-10 Threshold value comparison circuit for energy-saving control of lamp light Pending CN104955243A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN109638967A (en) * 2018-12-29 2019-04-16 苏州路之遥科技股份有限公司 A kind of Electrical Safety method for early warning of intelligent distribution box

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101997523A (en) * 2010-10-15 2011-03-30 北京联合大学生物化学工程学院 Window voltage comparator circuit capable of adjusting up limit voltage and low limit voltage automatically
WO2013164625A1 (en) * 2012-05-04 2013-11-07 Litonics Limited Lighting device
CN203554738U (en) * 2013-09-29 2014-04-16 中山朗之源环境能源技术有限公司 Energy-saving control apparatus of LED street lamp
US20140265845A1 (en) * 2011-03-31 2014-09-18 Litonics Limited Lighting device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101997523A (en) * 2010-10-15 2011-03-30 北京联合大学生物化学工程学院 Window voltage comparator circuit capable of adjusting up limit voltage and low limit voltage automatically
US20140265845A1 (en) * 2011-03-31 2014-09-18 Litonics Limited Lighting device
WO2013164625A1 (en) * 2012-05-04 2013-11-07 Litonics Limited Lighting device
CN203554738U (en) * 2013-09-29 2014-04-16 中山朗之源环境能源技术有限公司 Energy-saving control apparatus of LED street lamp

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN109638967A (en) * 2018-12-29 2019-04-16 苏州路之遥科技股份有限公司 A kind of Electrical Safety method for early warning of intelligent distribution box

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Application publication date: 20150930