CN108200689A - LED illumination device light synchronization system based on alternating current voltage zero crossing - Google Patents
LED illumination device light synchronization system based on alternating current voltage zero crossing Download PDFInfo
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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Abstract
The invention discloses the LED illumination device light synchronization systems based on alternating current voltage zero crossing, including electric power driving module, voltage over zero detection circuit, microprocessor, LED luminance control circuit, LED light source, the electric power driving module, voltage over zero detection circuit are connect respectively with microprocessor, microprocessor is connect by LED luminance control circuit with LED light source, stores dimming commands or dimmer procedure in the microprocessor；Pass through the system of the present invention, the continued synchronization variation of a large amount of different light source colours and brightness in same lighting mains can be achieved, there is major progress in large-scale complex dynamic lighting technical field, using the design difficulty that can greatly reduce system deployment cost and dimmer procedure in the market.
Description
Technical field
The present invention relates to dynamic lighting technical fields, and in particular to the LED illumination device based on alternating current voltage zero crossing
Light synchronization system.
Background technology
In a large amount of families, business intelligence LED illumination scene, multiple light sources can synchronous change color and brightness be one often
See and important demand.
To meet the needs of extensive lighting apparatus realizes complicated dynamic lighting scene, bus is mainly used in traditional technology
Centralized control or wireless centralized control solve.1st, bus centralized control is to be connected each light source by bus
It connects, dimming commands is sent to different light sources from Centralized Controller simultaneously.It is connected due to the use of bus, this scheme is in quantity of light source
When more, wiring expenditure is larger, and user is not easy to be transformed lighting system or redesign when lighting demand changes.
2nd, wireless centralized control sends dimming commands to different light sources simultaneously by radio communication from Centralized Controller and realizes.It is this
Scheme reduces installation and transformation difficulty, but when quantity of light source is more, and during lamplight scene complexity, wireless communication expense can be very big,
It is difficult to realize the Synchronization Control to different light sources.On the other hand, packet loss easily occurs due to wirelessly communicating, the time of light source response
Deviation can be very big or even will appear the phenomenon that part light source is without response.
Another light method of synchronization is to use lighting apparatus internal timing function in the prior art.Which refers to light modulation
Order is stored in lighting apparatus, each lighting apparatus performs dimming commands successively according to internal timing.This method can be very
The good extensive lighting apparatus of solution realizes the demand of complicated dynamic lighting scene.But due to necessarily being deposited between light source internal timing
Deviation (the problem of hardware is inevitable), after a period of time is run, deviation, which is built up, will cause user to observe light source
Variation does not resynchronize.To solve the problems, such as this, need an external clock reference at regular intervals by entire lighting mains when
Clock re-synchronization.Traditional approach realizes the transmission of external clock information using bus or the mode of radio broadcasting.However bus
Mode needs a large amount of wirings, cost higher and dumb；Wireless communication is susceptible to packet loss, and different intelligent light sources receives
Synchronic command may become inconsistent due to hop count and generation re-transmission.
Invention content
It is an object of the invention to overcome more than technical problem, the LED illumination based on alternating current voltage zero crossing is provided and is set
Standby light synchronization system, the system are capable of providing stable and consistent clock signal, make multiple equipment in same lighting mains
Light color keeps synchronous variation with brightness for a long time.
The present invention is achieved through the following technical solutions：
LED illumination device light synchronization system based on alternating current voltage zero crossing, including electric power driving module, voltage mistake
Zero-detection circuit, microprocessor, LED luminance control circuit, LED light source, the electric power driving module, voltage over zero detection
Circuit is connect respectively with microprocessor, and microprocessor is connect by LED luminance control circuit with LED light source, microprocessor storage
Dimming commands, wherein：
Voltage over zero detection circuit：Detect the zero crossing of external communication supply voltage, tranmitting data register signal to microprocessor
Device；
Microprocessor：The clock signal that zero-crossing detection circuit is sent is received, according to the dimming commands of storage, sends light modulation
Signal is to LED luminance control circuit；
LED luminance control circuit：The dim signal that microprocessor is sent is received, driving LED is adjusted further according to dim signal
The voltage and current of light source；
LED light source：The drive signal that LED luminance control circuit is sent is received, as desired Intensity LEDs.
The synchronous method proposed using the technical program can reach the brightness of different light sources and color change in lighting mains
Be not in the phenomenon that deviation is accumulated to the synchronism deviation less than 1ms, and since clock source is unique.
The microprocessor of the present invention can be used be internally integrated MCU be usually embedded formula chip, such as STM32, TICC2530,
NXP JN5168.GPIO is connect by microprocessor with voltage over zero detection circuit, is powered by a power supply power supply, can be to connection
LED luminance control circuit exports PWM wave or other digital dimming signals.Microprocessor runs signal light control program.Connect voltage
The GPIO of zero-crossing detection circuit is arranged to interrupt mode, is triggered by the rising edge or failing edge of voltage signal.It receives every time
Coincidence counter is added 1 by synchronous I/O interrupt, dimmer procedure, and counter resets to 0 if being more than maximum value.According to count value and tune
Light demand, microprocessor export dim signal to LED control circuit.
Power driving circuit includes the first current rectifying and wave filtering circuit, transformer, switching device, PWM controls IC, the second rectification filter
Wave circuit, feedback circuit, output module, the input terminal of the transformer is connect with the first current rectifying and wave filtering circuit, output terminal and
Two current rectifying and wave filtering circuits connect, and one end of second current rectifying and wave filtering circuit is connect with output module, and the other end passes sequentially through instead
Current feed circuit, PWM controls IC, switching device and transformer connect, the input terminal and external communication of first current rectifying and wave filtering circuit
Power supply circuit connects.Further, the alternating current flowed through on L, N line flows into change after the first current rectifying and wave filtering circuit rectifying and wave-filtering
Depressor, PWM controls IC first make switch device conductive and shutdown by the one fixed frequency in inside, and the voltage on transformer is switching
The second current rectifying and wave filtering circuit is output under control, then passes through the voltage and electricity of output module rear end circuit with stable again
Stream；Feedback circuit receives the voltage and current signal of the second current rectifying and wave filtering circuit, and is fed back to PWM controls IC；PWM is controlled
IC automatically adjusts the frequency and duty ratio of output pwm signal according to feedback, and then passes through the switch that switching device controls transformer
Frequency and time achieve the purpose that adjust transformer output voltage and electric current.The driving power of the present invention can be chosen all suitable
Isolation and the non-isolated power supply of LED is closed, mainly including inverse-excitation type, the constant current of the power supply architectures such as positive activation type, linear and constant voltage source.
Switching Power Supply such as based on BP2519, BP3519, VPER26, PN8359 isolation/non-isolated IC designs.
Voltage over zero detection circuit includes rectifier diode D1, D2, optocoupler U1, zener diode ZD1, the first limit
Flow point volt circuit, the second current limliting bleeder circuit, the input terminal and external communication power supply circuit of described rectifier diode D1, D2 connect
It connects, the input terminal after output terminal parallel connection with the first current limliting bleeder circuit is connect, the zener diode ZD1 and the second current limliting partial pressure
With optocoupler U1's while one end after circuit in parallel is connect with the output terminal of the first current limliting bleeder circuit, the other end is grounded
Input terminal connects, the GPIO connections of the output terminal and microprocessor of optocoupler U1.
The first current limliting bleeder circuit is current limliting divider resistance R1, R2, the R3 being connected in series with, the second current limliting bleeder circuit
Be limited flow point piezoresistance R4.
It is the concrete structure of voltage over zero detection circuit above.After the power is turned on, the positive half period alternating current of L/N is through diode
D1/D2 is rectified into DC voltage, this voltage by after current limliting divider resistance R1, R2, R3, R4 more than at least two at R4 both ends
Generate a branch pressure voltage；After the voltage at R4 both ends is more than the diode turn-on voltage of U1 optocoupler inputs, the input of U1 optocouplers
The diode current flow at end, the conducting of U1 optocoupler outputs, the pin voltage of I/O mouthfuls of the detection of microprocessor is drawn by U1 optocouplers at this time
Low, i.e., the variation of high-low voltage has occurred in I/O at this time mouthfuls of voltage.In the entire L/N positive half period D1/D2 conductings being powered and light
In the coupling U1 constantly on times, I/O mouthfuls of the detection of microprocessor is low level always；Only pass through the positive half period voltage of L/N
Close on the lowest point and in the case of D1/D2 and U1 do not turn on, the detection I/O eloquence of microprocessor is high level.Zener diode ZD1 is used
Voltage in clamper R4 both ends plays a part of to protect optocoupler U1.
LED luminance control circuit include be connected with each other PWM controller, current setting circuit, the PWM controller it is defeated
Enter end connect with microprocessor, the connection of output terminal and LED light source, the current setting circuit is used to set maximum output electricity
Stream.Microprocessor exports PWM dim signals to PWM controller.The voltage that PWM controller is fed back by detecting current setting circuit
Signal and pwm signal export stable voltage and current to LED light source.PWM controller may be selected similar MOSFET, PAM2861,
The switching device of MT7201+ and DC/DC processing chips.
Compared with prior art, the present invention it has the following advantages and advantages：
The present invention, i.e., the LED illumination device light synchronization system based on alternating current voltage zero crossing, utilizes alternating current voltage
Zero crossing obtains clock signal, external clock reference that is consistent, stablizing is provided for light source, so as to realize in same lighting mains
A large amount of difference light source colours and the continued synchronization variation of brightness, large-scale complex dynamic lighting technical field have it is great into
Step, using the design difficulty that can greatly reduce system deployment cost and dimmer procedure in the market.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the general construction schematic diagram of light mixing system of the present invention；
Fig. 2 is the schematic diagram of electric power driving module of the present invention；
Fig. 3 is the circuit diagram of zero-crossing detection circuit of the present invention；
Fig. 4 is that the signal of microprocessor of the present invention flows to schematic diagram；
Fig. 5 is the signal flow graph of LED luminance control circuit of the present invention；
Fig. 6 is three paths of LEDs light source connection diagrams of the embodiment of the present invention 1.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in Fig. 1~5, the LED illumination device light synchronization system based on alternating current voltage zero crossing is driven including power supply
Dynamic model block, voltage over zero detection circuit, microprocessor, LED luminance control circuit, LED light source, the electric power driving module,
Voltage over zero detection circuit is connect respectively with microprocessor, and microprocessor is connected by LED luminance control circuit and LED light source
It connects, microprocessor storage dimming commands, wherein：
Voltage over zero detection circuit：Detect the zero crossing of external communication supply voltage, tranmitting data register signal to microprocessor
Device；
Microprocessor：The clock signal that zero-crossing detection circuit is sent is received, according to the dimming commands of storage, sends light modulation
Signal is to LED luminance control circuit；
LED luminance control circuit：The dim signal that microprocessor is sent is received, driving LED is adjusted further according to dim signal
The voltage and current of light source；
LED light source：The drive signal that LED luminance control circuit is sent is received, as desired Intensity LEDs.
Power driving circuit includes the first current rectifying and wave filtering circuit, transformer, switching device, PWM controls IC, the second rectification filter
Wave circuit, feedback circuit, output module, the input terminal of the transformer is connect with the first current rectifying and wave filtering circuit, output terminal and
Two current rectifying and wave filtering circuits connect, and one end of second current rectifying and wave filtering circuit is connect with output module, and the other end passes sequentially through instead
Current feed circuit, PWM controls IC, switching device and transformer connect, the input terminal and external communication of first current rectifying and wave filtering circuit
Power supply circuit connects.Voltage over zero detection circuit include rectifier diode D1, D2, optocoupler U1, zener diode ZD1,
First current limliting bleeder circuit, the second current limliting bleeder circuit, input terminal and external communication the power supply electricity of described rectifier diode D1, D2
Road connects, and the input terminal after output terminal parallel connection with the first current limliting bleeder circuit is connect, the zener diode ZD1 and the second current limliting
One end after bleeder circuit parallel connection is connect with the output terminal of the first current limliting bleeder circuit, the other end ground connection while and optocoupler
The input terminal connection of U1, the GPIO connections of the output terminal and microprocessor of optocoupler U1.The first current limliting bleeder circuit is
Current limliting divider resistance R1, R2, the R3 being connected in series with, the second current limliting bleeder circuit are limited flow point piezoresistance R4.LED luminance control electricity
Road includes the PWM controller being connected with each other, current setting circuit, and the input terminal of the PWM controller connect with microprocessor, is defeated
Outlet is connect with LED light source, and the current setting circuit is used to set maximum output current.
The present invention provides a specific experiment case study on the basis of embodiment 1：
50Hz alternating currents are accessed using isolated power supply of the self-control based on BP3519, using TI CC2530 as system microprocessor
Device exports PWM dim signals respectively to based on No. three intednsity circuits that PAM2861 is designed, to control red, green, blue three respectively
The brightness of paths of LEDs lamp bead, circuit of light sources are as shown in Figure 6.Application requirement showed a kind of light of color, display order every 1 second
For red, green, blue, recycle successively, it is desirable that 10 independent lighting apparatus can synchronous change light color, and keep lamp for a long time
Light color is consistent.Using scheme provided by the invention, 10 lighting apparatus are connected into same alternating current and are inputted, after city conducts, electricity
Source drives work and generates stable voltage and current to microprocessor and LED luminance control circuit；It is handed over when positive half cycle is presented in L/N
During galvanic electricity, the conducting of rectifier diode on alternating current voltage zero cross detection circuit, by after current limliting divider resistance in the defeated of optocoupler
Enter end and generate the operating voltage for being more than optocoupler, optocoupler conducting；At this time a high-low voltage conversion letter is generated in the receiving terminal of optocoupler
Number to I/O mouthfuls of microprocessor；Microprocessor receive the clock signal from voltage over zero detection circuit, clock signal it is each
Rising edge will generate a subsynchronous I/O interrupt, and coincidence counter is made to add 1；If coincidence counter is 50 integral multiple, microprocessor
PWM wave exports all the way for certain in device control red, green, blue, and control sequence carries out successively according to red, green, blue.
Above application example and existing dynamic light system are compared, and establish control group.Control group uses biography
The light simultaneous techniques of system lighting apparatus internal timing, application demand are identical with examples detailed above.By two groups of light lasting work simultaneously
Make one hour, and randomly select 10 observers to judge whether light synchronizes.The observer of selection (uses this hair to experimental group
Bright scheme) and control group it is unknown.Following table compares the light synchronous effect of conventional method and the present invention.
By upper table it is found that the light synchronization scheme of the present invention has a clear superiority compared to traditional scheme, do not have in the testing time
Have and the observable asynchrony phenomenon of human vision occurs.To increase to testing time 24 hours (can cover most lifes
Scene living), the present invention is still without there is light asynchrony phenomenon.Theoretically, as long as each equipment startup time is identical, and uses phase
Same power supply, scheme proposed by the present invention can make the illumination of multiple equipment be always maintained at synchronizing.
Above-described specific embodiment has carried out the purpose of the present invention, technical solution and advantageous effect further
It is described in detail, it should be understood that the foregoing is merely the specific embodiment of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (5)
1. the LED illumination device light synchronization system based on alternating current voltage zero crossing, which is characterized in that including power drives mould
Block, voltage over zero detection circuit, microprocessor, LED luminance control circuit, LED light source, the electric power driving module, voltage
Zero-crossing detection circuit is connect respectively with microprocessor, and microprocessor is connect by LED luminance control circuit with LED light source, micro-
Processor stores dimming commands, wherein：
Voltage over zero detection circuit：Detect the zero crossing of external communication supply voltage, tranmitting data register signal to microprocessor；
Microprocessor：The clock signal that zero-crossing detection circuit is sent is received, according to the dimming commands of storage, sends dim signal
To LED luminance control circuit；
LED luminance control circuit：The dim signal that microprocessor is sent is received, driving LED light source is adjusted further according to dim signal
Voltage and current；
LED light source：The drive signal that LED luminance control circuit is sent is received, as desired Intensity LEDs.
2. the LED illumination device light synchronization system according to claim 1 based on alternating current voltage zero crossing, feature
It is, power driving circuit includes the first current rectifying and wave filtering circuit, transformer, switching device, PWM controls IC, the second rectifying and wave-filtering
Circuit, feedback circuit, output module, the input terminal of the transformer is connect with the first current rectifying and wave filtering circuit, output terminal and second
Current rectifying and wave filtering circuit connects, and one end of second current rectifying and wave filtering circuit is connect with output module, and the other end passes sequentially through feedback
Circuit, PWM controls IC, switching device and transformer connect, and input terminal and the external communication of first current rectifying and wave filtering circuit supply
Circuit connects.
3. the LED illumination device light synchronization system according to claim 1 based on alternating current voltage zero crossing, feature
It is, voltage over zero detection circuit includes rectifier diode D1, D2, optocoupler U1, zener diode ZD1, the first current limliting
Bleeder circuit, the second current limliting bleeder circuit, the input terminal of described rectifier diode D1, D2 are connect with external communication power supply circuit,
Input terminal after output terminal parallel connection with the first current limliting bleeder circuit is connect, the zener diode ZD1 and the second current limliting partial pressure electricity
It is defeated with optocoupler U1 while one end after the parallel connection of road is connect with the output terminal of the first current limliting bleeder circuit, the other end is grounded
Enter end connection, the GPIO connections of the output terminal and microprocessor of optocoupler U1.
4. the LED illumination device light synchronization system according to claim 3 based on alternating current voltage zero crossing, feature
It is, the first current limliting bleeder circuit is current limliting divider resistance R1, R2, the R3 being connected in series with, and the second current limliting bleeder circuit is
Current limliting divider resistance R4.
5. the LED illumination device light synchronization system according to claim 1 based on alternating current voltage zero crossing, feature
It is, LED luminance control circuit includes the PWM controller being connected with each other, current setting circuit, the input of the PWM controller
End is connect with microprocessor, the connection of output terminal and LED light source, and the current setting circuit is used to set maximum output current.
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| CN201810009202.0A CN108200689A (en) | 2018-01-05 | 2018-01-05 | LED illumination device light synchronization system based on alternating current voltage zero crossing |
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| CN109168227A (en) * | 2018-10-25 | 2019-01-08 | 上海联矽智能科技有限公司 | A kind of concealed integral intelligent light control system and implementation method |
| CN109712468A (en) * | 2018-12-21 | 2019-05-03 | 广州文兴电子科技有限公司 | A kind of liquid crystal imitation screen based under novel dimming mechanism |
| CN110099492A (en) * | 2019-05-29 | 2019-08-06 | 上海登芯微电子科技有限公司 | A kind of low power LED linear power circuit |
| CN111148313A (en) * | 2020-01-19 | 2020-05-12 | 杭州昀芯光电科技有限公司 | LED system with alternating current zero-crossing signal path and power supply path separated |
| CN111295005A (en) * | 2018-12-06 | 2020-06-16 | 深圳市云海物联科技有限公司 | Light synchronous control circuit and system based on zero-crossing detection |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109168227A (en) * | 2018-10-25 | 2019-01-08 | 上海联矽智能科技有限公司 | A kind of concealed integral intelligent light control system and implementation method |
| CN111295005A (en) * | 2018-12-06 | 2020-06-16 | 深圳市云海物联科技有限公司 | Light synchronous control circuit and system based on zero-crossing detection |
| CN109712468A (en) * | 2018-12-21 | 2019-05-03 | 广州文兴电子科技有限公司 | A kind of liquid crystal imitation screen based under novel dimming mechanism |
| CN110099492A (en) * | 2019-05-29 | 2019-08-06 | 上海登芯微电子科技有限公司 | A kind of low power LED linear power circuit |
| CN112312633A (en) * | 2019-07-25 | 2021-02-02 | 深圳市云海物联科技有限公司 | Synchronous control system, method and device for illuminating lamp and computer readable storage medium |
| CN111148313A (en) * | 2020-01-19 | 2020-05-12 | 杭州昀芯光电科技有限公司 | LED system with alternating current zero-crossing signal path and power supply path separated |
| CN111148313B (en) * | 2020-01-19 | 2024-10-25 | 杭州昀芯光电科技有限公司 | LED system with alternating current zero-crossing signal path and power supply path separated |
| CN111324569A (en) * | 2020-02-24 | 2020-06-23 | 宁波拓邦智能控制有限公司 | Multi-machine communication synchronization system, multi-machine communication synchronization method and electric appliance |
| CN112689357A (en) * | 2021-01-16 | 2021-04-20 | 正阳县合兴灯饰有限公司 | LED double-color control method and controller |
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Application publication date: 20180622 |
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| RJ01 | Rejection of invention patent application after publication |