CN108712802A - Stage light regulating system and method - Google Patents
Stage light regulating system and method Download PDFInfo
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- CN108712802A CN108712802A CN201810699985.XA CN201810699985A CN108712802A CN 108712802 A CN108712802 A CN 108712802A CN 201810699985 A CN201810699985 A CN 201810699985A CN 108712802 A CN108712802 A CN 108712802A
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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]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
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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]
- H05B45/20—Controlling the colour of the light
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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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of stage light regulating system and methods, the system comprises DC power supplier, DMX signal input modules, DSC digital signal controllers and multiple output channels, the DMX signal input modules are connect with DSC digital signal controllers；Each output channel corresponds to a kind of LED light of color, including controlled power voltage-stablizer, anti-oscillation power back-off filter module, pwm control signal controlled division device, Signal averaging voltage follower, Current cut-off negative feedback module, Current Negative Three-Point Capacitance module, high-power FET, power resistor current detection module and substrate temperature acquisition module.The present invention can not only realize fine light modulation, and can make rich in color bright-coloured, service life extension, more stable, meet the needs of professional stage to greatest extent.
Description
Technical field
The present invention relates to a kind of light regulating systems, especially stage light regulating system and method, belong to stage lighting
Photocontrol technical field.
Background technology
The requirement of professional stage adjusting light：The dimming scope of lamps and lanterns is the bigger the better, and to the response of DMX512 signals, The faster the better, goes out
The softer light the better, and the abundanter color the better, and adjustable color adjusting range is the bigger the better, and the higher the better for colour rendering index, and the service life is longer
It is better, it is all these to make to ensure with stablizing for system.Exactly these requirements so that LED lamp is difficult to use before the lights.
It is theoretical according to traditional three primary colours, it is only necessary to the LED lamp bead of three kinds of colors of RGB, you can to generate whole colors；But it was verified that
The basic colour mixture of LED lamp bead of three kinds of colors of RGB does not go out certain color sections, while dimming and feeling not soft enough yet.General LED
Lamps and lanterns are made of the lamp bead of multiple hair different color light, and each lamp bead only sends out a kind of extremely narrow light of frequency band, different color
The frequency spectrum of lamp bead frequency band line extremely narrow one by one, the extremely narrow (emission wavelength in maximal efficiency luminous zone are shown as on spectrogram
Range very little), wavelength is easily changed (colour cast) by external action；It is in addition high-power just because of the pure that lamp bead shines
Light modulation must use PWM method, color can be made to be varied from, at the same the variation of the wavelength with temperature of sent out light and deviate (i.e.
Color changes) so that three primary colours theory is difficult to apply to stage LED light photocontrol, there is the light RGB three of some colors
Mixing does not come out primary colours at all；In addition, the light that red-green-blue LED lamp bead is sent out has partially with traditional red-green-blue
Difference；And the difference between red-green-blue LED lamp bead is, under identical electric current, the luminous efficiency of three is different, no
Optimal luminescent efficiency can be reached simultaneously, the quantity of each color channels drive lamp bead also influences luminous efficiency, commonly uses constant current driving
All there is this in chip, country's LED lamp all has this at present.
To solve the above problems, some producers start the multiple lamp beads for being considered as different base colors at present, for example, by using four
Primary colours lamp bead, color blending effect are relatively good.However in practical applications, color still not enough enriches bright-coloured, soft degree
Or it is inadequate, and its basic reason is that its regulating system does not account for the influence factor of PWM pulsewidths and supply voltage and temperature
Deng.In addition, the LED dimmer for being usually used in light of stage control at present is simple using being made of outputting inductance and output capacitance
LC filters glisten problem for reducing low side, and this simple LC filters are unloaded or be easy to disturb at light load
The problem of harmonic oscillation, it is easily damaged filter, light modulator is also unstable.The exactly above reason causes some LED lamps to use
After three months, light decay is serious, and failure rate rises, and so that people is misread and thinks that LED lamp service life is significantly smaller than 50,000 hours.But
In fact, the service life of LED lamp can reach 50,000 hours or more, only need to solve the above problems.
Invention content
The purpose of the present invention is to solve the defects of the above-mentioned prior art, provide a kind of stage light adjusting system
System, the system can not only realize fine light modulation, and can make rich in color bright-coloured, service life extension, more stable, maximum limit
Degree meets the needs of professional stage.
Another object of the present invention is to provide a kind of stage light adjusting method based on above system.
The purpose of the present invention can be reached by adopting the following technical scheme that：
Stage light regulating system, the system comprises DC power supplier, DMX signal input modules, DSC numbers letters
Number controller and multiple output channels, the DMX signal input modules are connect with DSC digital signal controllers；Each output
Channel corresponds to a kind of LED light of color, including controlled power voltage-stablizer, anti-oscillation power back-off filter module, pwm control signal
Controlled division device, Signal averaging voltage follower, Current cut-off negative feedback module, Current Negative Three-Point Capacitance module, high-power field-effect
Pipe, power resistor current detection module and substrate temperature acquisition module；
The controlled power voltage-stablizer respectively with DC power supplier, DSC digital signal controllers, anti-oscillation power back-off
Filter module connects, and the anti-oscillation power back-off filter module connects LED light；The pwm control signal controlled division device point
It is not connect with DSC digital signal controllers, Signal averaging voltage follower；The Signal averaging voltage follower and high-power field
Effect pipe connects, and the high-power FET connects LED light, and is connect with power resistor current detection module；The power
Resistor current detection module is connect with Current Negative Three-Point Capacitance module, Current cut-off negative feedback module respectively；The Current Negative Three-Point Capacitance mould
Block is connect with Signal averaging voltage follower, DSC digital signal controllers respectively；The Current cut-off negative feedback module and signal
Superimposed voltage follower connects；The substrate temperature acquisition module is used to detect the temperature of LED substrate, and with DSC digital signals
Controller connects.
Further, the Signal averaging voltage follower, high-power FET, power resistor current detection module and
Current cut-off negative feedback module is sequentially connected composition Current cut-off negative feedback link, and Current cut-off negative feedback link constitutes interior
Ring, current break caused by for preventing a variety of causes damage high-power FET.
Further, the Signal averaging voltage follower, high-power FET, power resistor current detection module and
Current Negative Three-Point Capacitance module is sequentially connected composition Current Negative Three-Point Capacitance link, and Current Negative Three-Point Capacitance link constitutes middle ring, big for stablizing
Electric current on power field effect pipe.
Further, the DSC digital signal controllers, pwm control signal controlled division device, Signal averaging voltage follow
Device, high-power FET, power resistor current detection module and Current Negative Three-Point Capacitance module are sequentially connected composition DSC digital signals
Controller negative feedback links, DSC digital signal controller negative feedback links constitute outer shroud, for realizing the DSC of various complexity
Control.
Further, the DSC digital signal controllers, pwm control signal controlled division device, Signal averaging voltage follow
Device, high-power FET, LED light and substrate temperature acquisition module are sequentially connected composition temperature negative feedback links, and temperature is negative anti-
Feedback link constitutes temperature ring, for realizing the constant of temperature.
Further, the DSC digital signal controllers, controlled power voltage-stablizer, anti-oscillation power back-off filter module,
LED light, high-power FET, power resistor current detection module and Current Negative Three-Point Capacitance module are sequentially connected composition supply voltage
Negative feedback links, supply voltage negative feedback links constitute Voltage loop, for realizing the stabilization of voltage.
Further, the pwm control signal controlled division device includes the first controlled electric potential device, first controlled electric potential
Resistor is respectively set in the both ends of device, for limiting adjustable current range.
Further, the controllable voltage-stablizer and the second controlled electric potential device that the controlled power voltage-stablizer is connected, described
Two controlled electric potential devices are connect with DSC digital signal controllers, anti-oscillation power back-off filter module respectively, the second controlled electric potential device
Both ends resistor is respectively set, for limiting adjustable voltage range.
Further, it is additionally provided with and to be connected in the connection line between the controllable voltage-stablizer and the second controlled electric potential device
The output end of Schottky diode and energy storage inductor, the second controlled electric potential device is equipped with filter condenser；
The anti-oscillation power back-off filter module is connect with filter condenser comprising the power resistor and work(being in series
Rate capacitor；
The energy storage inductor and filter condenser of the controlled power voltage-stablizer and the work(of hunting power compensation filter module
Rate resistance and power capacitor constitute controllable resonant and damp LC output filters.
Further, the Current cut-off negative feedback module includes a high speed operation amplifier, and the high-speed computation is put
Resistor is respectively set in the both ends of big device, for limiting cut-off current range, to protect high-power FET not by overcurrent
Impact, to protect the LED light of this output channel.
In above system structure, the DSC digital signal controllers are using 16 or more high temperature resistant high interference immunities without external
The high-performance DSC digital signal controllers of crystal oscillator coordinate the PWM wave of high speed to modulate the fine light modulation, it can be achieved that flexible and changeable,
Keep the light exquisiteness of output soft, system is reliable and stable.
Another object of the present invention can be reached by adopting the following technical scheme that：
Stage light adjusting method based on above system, the method includes：
DSC digital signal controllers receive each output channel signal from DMX signaling modules, come from substrate temperature respectively
The temperature signal of signaling module and in each output channel Current Negative Three-Point Capacitance module current signal, it is then logical to each output
Road signal, temperature signal and current signal are handled, and corresponding control signal is exported to each output channel；
Control signal from DSC digital signal controllers is sent after pwm control signal controlled electric potential device is divided
Enter Signal averaging voltage follower, Signal averaging voltage follower receives the current signal of Current Negative Three-Point Capacitance module simultaneously；
After Signal averaging voltage follower is further processed the control signal after partial pressure according to current signal, finally
Control signal be delivered at LED light by high-power FET；
Power resistor current detection module detects the electric current of high power tube output end in real time, is handled by operation amplifier, electricity
Obtained current signal is fed back to DSC digital signal controllers and Signal averaging voltage follower by stream negative feedback module respectively；
After controlled power voltage-stablizer receives the control signal from DSC digital signal controllers, to coming from DC power supply mould
The voltage of block carries out steady pressure treatment, is delivered at LED light after anti-oscillation power filter module.
The present invention has following advantageous effect compared with the existing technology：
1, the present invention realizes Current cut-off negative feedback link, Current Negative Three-Point Capacitance ring on the basis of existing light adjusting system
Section, DSC digital signal controllers negative feedback links, temperature negative feedback links and supply voltage negative feedback links are constituted five negative anti-
Loop technique is presented, current break caused by wherein Current cut-off negative feedback link can prevent a variety of causes damages high-power field-effect
Pipe, Current Negative Three-Point Capacitance link can stablize the electric current on high-power FET, DSC digital signal controller negative feedback links,
The DSC controls of various complexity may be implemented, the constant of temperature, supply voltage negative feedback links may be implemented in temperature negative feedback links
The stabilization of voltage may be implemented, five negative feedback loops constitute the core of extremely stable LED driver, are stablizing LED lamp
While voltage and current, the complexity light modulation to LED lamp is realized, the reliability and stability of system are greatly improved,
The flexibility for substantially increasing system makes to be very suitable for requiring stringent stage occasion using the product of the present embodiment system.
2, the present invention is controlled using DSC digital signal controllers, and DSC digital signal controllers receive the DMX in all channels
The temperature signal of input control signal, current negative feedback signal and LED substrate passes through self-adaptive processing according to the scheme of use,
It finds optimum control scheme and generates different pwm control signals to each channel, and adjust controlled electric potential device and realize PWM constant currents
The fine tuning of driving, at the same to controlled power voltage-stablizer adjust change output voltage so that the LED light of each color normally by
Except DMX controls, LED light is made effectively to be mended with PWM variation colour casts and temperature change colour cast and a variety of LED light colour mixture colour casts
It repays.In addition the coordination linkage mechanism for increasing different color channels, colour temperature in the uniform hot spot to ensure to realize hot spot
It is consistent everywhere.
3, the present invention can connect the LED light of a variety of different colors (it was verified that seven kinds by the way that multiple output channels are arranged
Color can make output light reach best), since the operating voltage (or LED light forward voltage drop) of the LED light of different color is different,
And its luminous wavelength can be deviated with after the first offset to red end of temperature rise to purple end, and PWM pulse width variations, color also have
Offset variation, thus the output channel setting controlled power voltage-stablizer of each color LED light and anti-oscillation power back-off filter mould
Block makes all applicable identical DC supply input of the LED light of various colors, while sending out under identical control signal identical
The light of proportional strength has corrected the wavelength of offset；The use of anti-oscillation power back-off filter module, makes LED light avoid high frequency
The impact for vibrating overcurrent, extends the service life of LED light；Meanwhile also extending the longevity of DC power supply and entire control system
Life；To extend the service life of LED lamp.
4, the present invention by using fine tuning multicolour LED light control signal and controlled power voltage-stablizer come compensate because
Color offset caused by temperature change and PWM duty cycle change, to realize fine and smooth soft fine light modulation, and meanwhile it is easily real
It is existing rich in color bright-coloured, in addition to that can apply other than professional stage, other high-end occasions can also be widely used in.
5, the present invention compared with existing light adjusting system, it can be achieved that the more colour mixture of multicolour LED light, therefore stage lighting after colour mixture
The color of light is more rich colorful；Meanwhile the LED light of each road color is dimmed using high-performance DSC digital signal controllers, make
The more soft exquisiteness of light of LED lamp output.
Description of the drawings
Fig. 1 is that the stage of the embodiment of the present invention controls the structural schematic diagram of single output channel with light regulating system.
Fig. 2 is that the stage of the embodiment of the present invention controls the circuit diagram of single output channel with light regulating system.
Specific implementation mode
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment 1：
As shown in Figure 1, present embodiments provide a kind of stage light regulating system, the system include galvanic electricity source module,
DMX signal input modules, DSC digital signal controllers and multiple output channels (#1, #2, #3, #4, #5, #6, #7 ...), directly
Galvanic electricity source module connect with each output channel (#1, #2, #3, #4, #5, #6, #7 ...) and respectively to each output channel (#1, #2, #
3, #4, #5, #6, #7 ...) bearing power is provided, DMX signal input modules are connect with DSC digital signal controllers, and each output is logical
Road (#1, #2, #3, #4, #5, #6, #7 ...) is also connect with DSC digital signal controllers respectively.
The structure of all output channels (#1, #2, #3, #4, #5, #6, #7 ...) is identical, and each output channel corresponds to LED light
A kind of LED light of color of tool, including controlled power voltage-stablizer, anti-oscillation power back-off filter module, pwm control signal are controlled
Divider, Signal averaging voltage follower, Current cut-off negative feedback module, Current Negative Three-Point Capacitance module, high-power FET, work(
Rate resistor current detection module and substrate temperature acquisition module.
Further, the controlled power voltage-stablizer respectively with DC power supplier, DSC digital signal controllers, vibrationproof
The connection of power back-off filter module is swung, specifically, the input terminal of controlled power voltage-stablizer is connect with DC power supplier, controlled work(
The controlled end of rate voltage-stablizer is connect with the output end of pressure-stabilizing of DSC digital signal controllers, the output end of controlled power voltage-stablizer with
The input terminal connection of anti-oscillation power back-off filter module；Anti- oscillation power back-off filter module connects LED light, specifically, prevents
The high-end input (i.e. high-voltage side) of the output end connection LED light of hunting power compensation filter module；Controlled point of pwm control signal
Depressor is connect with DSC digital signal controllers, Signal averaging voltage follower respectively, specifically, pwm control signal controlled division
The PWM output ends of the input terminal connection DSC digital signal controllers of device, the output end connection of pwm control signal controlled division device
The positive input terminal of Signal averaging voltage follower；Signal averaging voltage follower is connect with high-power FET, specifically, letter
The output end of number superimposed voltage follower and the input terminal of high-power FET connect；High-power FET connects LED light,
And connect with power resistor current detection module, specifically, the low side of the output end connection LED light of high-power FET
It inputs (i.e. low voltage side), another output end of high-power FET connects with the input terminal of power resistor current detection module
It connects；Power resistor current detection module is connect with Current Negative Three-Point Capacitance module, Current cut-off negative feedback module respectively, specifically, work(
One output end of rate resistor current detection module is connect with the input terminal of Current Negative Three-Point Capacitance module, power resistor current detecting mould
Another output end of block is connect with the input terminal of Current cut-off negative feedback module；Current Negative Three-Point Capacitance module respectively with Signal averaging
Voltage follower, the connection of DSC digital signal controllers, specifically, the output end of Current Negative Three-Point Capacitance module respectively with Signal averaging
The input terminal connection of the negative input end, DSC digital signal controllers of voltage follower；Current cut-off negative feedback module is folded with signal
Making alive follower connects, and specifically, the output end of Current cut-off negative feedback module and bearing for Signal averaging voltage follower are defeated
Enter end connection；Substrate temperature acquisition module is used to detect the temperature of LED substrate, and is connect with DSC digital signal controllers, specifically
Ground, substrate are aluminum substrate, and the output end of substrate temperature acquisition module is connect with the input terminal of DSC digital signal controllers.
As depicted in figs. 1 and 2, pwm control signal controlled division device includes the first controlled electric potential device P1, the first controlled electric potential
First resistor device RP1 and second resistor RP2 is respectively set in the both ends of device P1, and first resistor device RP1 and second resistor RP2 are used
In restriction adjustable current range；Pwm control signal controlled division device is divided into pwm control signal by a relatively large margin relatively slightly
The pwm control signal of degree, to be output in Signal averaging voltage follower；First controlled electric potential device P1 is one by DSC numbers
Signal controller controls the potentiometer of resistance value, and the pwm control signal that suitable amplitude is divided out by it passes through Current Negative Three-Point Capacitance module
Stable element obtain corresponding load (LED light) current value, that is to say, that the current value of LED light is by DSC digital signal controls
Device control processed.
Controlled power voltage-stablizer includes the controllable voltage-stablizer U1 being connected and the second controlled electric potential device P2, and controllable voltage-stablizer is set
In the output end of DC power supplier, the output end of the second controlled electric potential device is connect with anti-oscillation power filter module；It is controllable steady
The Schottky diode D1 being connected and energy storage inductor L2 is additionally provided in connection line between depressor and the second controlled electric potential device,
The output end of second controlled electric potential device P2 is equipped with filter condenser C2；Second controlled electric potential device is one by DSC digital signal controls
The potentiometer of device control resistance value processed, 3rd resistor device RP3 and the 4th resistor is respectively set in the second both ends controlled electric potential device P2
For limiting adjustable voltage range, specific effect is believed in DSC numbers by RP4,3rd resistor device RP3 and the 4th resistor RP4
Under the control of number controller, controllable voltage-stablizer is made to generate suitable output voltage；Anti- oscillation power filter module and filter condenser
It is connected comprising control is received in the power resistor R1 and power capacitor C3 being in series, the connection of anti-oscillation power filter module one end
Power voltage-stablizer is output on the power cord of LED light, and the other end is connected on ground wire, effect be have relatively high power inductance and
Whole system stabilization is set not generate oscillation in the case of capacitance, in underloading or no-load, and output voltage is more stable；Anti- oscillation
Power filter module and controlled power voltage-stablizer constitute controllable resonant damping LC and export compensating filter, specifically, controlled power
The energy storage inductor and filter condenser of voltage-stablizer and the power resistor and power capacitor of hunting power compensation filter module,
It constitutes controllable resonant and damps LC output filters.
Current cut-off negative feedback module include a high speed operation amplifier AMP2A, the two of high speed operation amplifier AMP2A
The 5th resistor RP9 and the 6th resistor RP10 is respectively set in end, for limiting cut-off current range, to protect high-power field to imitate
It should manage and not impacted by overcurrent, to protect the LED light of this output channel.
Signal averaging voltage follower AMP1A, high-power FET M1, power resistor current detection module R3 and electric current
Cut-off negative feedback module AMP2A is sequentially connected composition Current cut-off negative feedback link, and Current cut-off negative feedback link constitutes interior
Ring, current break damage high-power FET M1 caused by for preventing a variety of causes.
Signal averaging voltage follower AMP1A, high-power FET M1, power resistor current detection module R3 and electric current
Negative feedback module AMP1B is sequentially connected composition Current Negative Three-Point Capacitance link；AMP1A and AMP1B in the circuit of Current Negative Three-Point Capacitance link
It is two high speed operation amplifiers；Current Negative Three-Point Capacitance link makes the electric current (being exactly the electric current of load LED lamp in fact) detected
It always following the given PWM amplitudes that pwm control signal and controlled electric potential device export and changes, the electric current in LED light stabilizes, by
The influence very little of LED light situation of change, then the emission wavelength of LED light just stablize, i.e. color stable, it is only with the change of control signal
Change and change, that is to say, that the load current value of LED light is controlled by DSC digital signal controllers；Current Negative Three-Point Capacitance link
Middle ring is constituted, for stablizing the electric current on high-power FET.
DSC digital signal controllers U2, pwm control signal controlled division device P1, Signal averaging voltage follower AMP1A,
High-power FET M1, power resistor current detection module R3 and Current Negative Three-Point Capacitance modules A MP1B are sequentially connected composition DSC numbers
Word signal controller negative feedback links, DSC digital signal controller negative feedback links constitute outer shroud, for realizing various complexity
DSC control.
DSC digital signal controllers U2, pwm control signal controlled division device P1, Signal averaging voltage follower AMP1A,
High-power FET M1, LED light and substrate temperature acquisition module TEM and AMP2B are sequentially connected composition temperature negative feedback links,
Temperature negative feedback links constitute temperature ring, for realizing the constant of temperature.
DSC digital signal controllers U2, controlled power voltage-stablizer U1, anti-oscillation power back-off filter module R1 and C3, LED
Lamp and substrate temperature acquisition module TEM and AMP2B are sequentially connected composition supply voltage negative feedback links, supply voltage negative feedback loop
Section constitutes Voltage loop, for realizing the stabilization of voltage.
By the above it is found that the Current cut-off negative feedback link of the present embodiment, Current Negative Three-Point Capacitance link, DSC numbers letter
Number controller negative feedback links, temperature negative feedback links and supply voltage negative feedback links together form five negative feedback loops, and five
Negative feedback loop constitutes the core of extremely stable LED driver, while the voltage and current for stablizing LED light, realizes
Complexity light modulation to LED light, greatly improves the reliability and stability of system, substantially increases the flexibility of system,
Make to be very suitable for requiring stringent stage occasion using the product of the present embodiment system.
In the present embodiment, the high temperature resistant that DSC digital signal controllers can be used 16 or more is high anti-interference without external crystal oscillator
High performance digital signal microcontroller PIC companies DSC series, coordinate the PWM wave of the system high-speed of the present embodiment to modulate,
Fine light modulation can be achieved, keep the light exquisiteness of output soft.
In the present embodiment, used controllable resonant damps LC output filters, by the energy storage inductor L2 of controlled voltage-stablizer
And the power resistor R1 and power capacitor C3 compositions of filter condenser C2 and anti-oscillation power back-off filter；It is filtered with tradition
Device compares, and can effectively prevent perturbation harmonic vibration phenomenon unloaded and at light load, makes controlled power voltage-stablizer U1 can be with
No-load running.
In the present embodiment, the first controlled electric potential device and the second controlled electric potential device are in addition to that can be by DSC Digital Signals
Device control digital regulation resistance, can also be DSC digital signal controllers control by CPLD (Complex Programmable Logic Devices),
Controlled resistor that GAL (gate array logic) and resistor network are constituted or other can be changed by DSC digital signal controller controls
Resistance form.It is, of course, preferable to which scheme is digital regulation resistance, because it is single-minded and more simple and reliable.If LED light electric current 1A with
Under close to 1A, then the ferrite inductance of the 1A electric currents of the optional 100uH of energy storage inductor L2, Schottky diode D1 may be selected 1A's
1N58XX series, the controllable optional 1A devices LM50XX of voltage-stablizer U1 are serial or LM250XX is serial, the preferred suitable current of high power tube
With the power field effect pipe MOSFET of suitable voltage, the resistor of current sense resistor preferably 1 Ω/2W.
The present embodiment additionally provides a kind of stage light adjusting method, and this method is realized based on above system, including with
Lower step：
S1, DSC digital signal controller receive each output channel signal from DMX signaling modules, carry out self-reference substrate respectively
The temperature signal of temperature signal module and in each output channel Current Negative Three-Point Capacitance module current signal, then to each defeated
Go out channel signal, temperature signal and current signal to be handled, corresponding control signal is exported to each output channel.
S2, the control signal from DSC digital signal controllers are divided by pwm control signal controlled electric potential device
Afterwards, it is sent into Signal averaging voltage follower, Signal averaging voltage follower receives the current signal of Current Negative Three-Point Capacitance module simultaneously.
After S3, Signal averaging voltage follower are further processed the control signal after partial pressure according to current signal,
Final control signal is delivered to by high-power FET at LED light.
S4, power resistor current detection module detect the electric current of high power tube output end in real time, are handled by operation amplifier,
Obtained current signal is fed back to DSC digital signal controllers and Signal averaging voltage follow by Current Negative Three-Point Capacitance module respectively
Device, if electric current mutates, current cut-off signal is fed back to Signal averaging voltage follower by Current cut-off negative feedback module,
Prevent high-power FET from damaging.
After S5, controlled power voltage-stablizer receive the control signal from DSC digital signal controllers, to coming from DC power supply
The voltage of module carries out steady pressure treatment, is delivered at LED light after anti-oscillation power filter module.
In the above process, DSC digital signal controllers receive DMX input signals, the Current Negative Three-Point Capacitance of all output channels
The feedback signal of module and the temperature signal of aluminum substrate are handled by DSC digital signal controller program self studies and optimization
Afterwards, different pwm control signals is generated to each channel with optimum control scheme and adjusts controlled electric potential device to control load
Electric current, while controlled power voltage-stablizer is adjusted to export suitable output voltage；Multiple channel LED lamps receive accordingly respectively
PWM pulse-width signals, while being controlled by corresponding voltage-stablizer, to which multichannel realizes the soft degree of light modulation of suitable stage jointly
And abundant gay colours.In the present embodiment, multiple and different primary-color LED lamp colour mixtures are calculated using empirical data table and linear interpolation
The color mixing method that method is combined, while will be steady by adjusting controlled power according to temperature and the duty ratio of PWM to colo(u)r-mixture data
The output voltage of depressor compensates affected color, i.e. wavelength.
In addition, DSC digital signal controller programs, receive the DMX input signals and current negative feedback signal in all channels
With the temperature signal of aluminum substrate, handled by self study and optimization according to the scheme of use, with optimum controling strategy to each
Channel generates different pwm control signals and adjusts the fine tuning that controlled electric potential device realizes PWM constant currents driving, while to controlled work(
The adjustment of rate voltage-stablizer changes output voltage.So that the LED light of each color by DMX except normally being controlled, LED light becomes with PWM
Change colour cast and temperature change colour cast, a variety of LED light colour mixture colour casts is made to obtain effective compensation.Meanwhile it is logical to also add different colours
The coordination system in road.
In conclusion the present invention on the basis of existing light adjusting system, realizes Current cut-off negative feedback link, electric current is born
What feedback element, DSC digital signal controllers negative feedback links, temperature negative feedback links and supply voltage negative feedback links were constituted
Current break damage is high-power caused by five negative feedback loop technologies, wherein Current cut-off negative feedback link can prevent a variety of causes
Field-effect tube, Current Negative Three-Point Capacitance link can stablize the electric current on high-power FET, DSC digital signal controller negative-feedbacks
The DSC controls of various complexity may be implemented in link, and the constant of temperature may be implemented in temperature negative feedback links, and supply voltage is negative anti-
The stabilization of voltage may be implemented in feedback link, and five negative feedback loops constitute the core of extremely stable LED driver, are stablizing LED
While the voltage and current of lamps and lanterns, the complexity light modulation to LED lamp is realized, greatly improves the reliability of system and steady
It is qualitative, the flexibility of system is substantially increased, makes to be very suitable for requiring stringent stage using the product of the present embodiment system
Occasion.
The above, patent preferred embodiment only of the present invention, but the protection domain of patent of the present invention is not limited to
This, any one skilled in the art is in the range disclosed in patent of the present invention, according to the skill of patent of the present invention
Art scheme and its inventive concept are subject to equivalent substitution or change, belong to the protection domain of patent of the present invention.
Claims (10)
1. stage light regulating system, it is characterised in that：The system comprises DC power supplier, DMX signal input modules,
DSC digital signal controllers and multiple output channels, the DMX signal input modules are connect with DSC digital signal controllers；
Each output channel corresponds to a kind of LED light of color, including controlled power voltage-stablizer, anti-oscillation power back-off filter module, PWM
Control signal controlled division device, Signal averaging voltage follower, Current cut-off negative feedback module, Current Negative Three-Point Capacitance module, big work(
Rate field-effect tube, power resistor current detection module and substrate temperature acquisition module；
The controlled power voltage-stablizer is filtered with DC power supplier, DSC digital signal controllers, anti-oscillation power back-off respectively
Module connects, and the anti-oscillation power back-off filter module connects LED light；The pwm control signal controlled division device respectively with
DSC digital signal controllers, the connection of Signal averaging voltage follower；The Signal averaging voltage follower and high-power field-effect
Pipe connects, and the high-power FET connects LED light, and is connect with power resistor current detection module；The power resistor
Current detection module is connect with Current Negative Three-Point Capacitance module, Current cut-off negative feedback module respectively；The Current Negative Three-Point Capacitance module point
It is not connect with Signal averaging voltage follower, DSC digital signal controllers；The Current cut-off negative feedback module and Signal averaging
Voltage follower connects；The substrate temperature acquisition module is used to detect the temperature of LED substrate, and with DSC Digital Signals
Device connects.
2. stage light regulating system according to claim 1, it is characterised in that：The Signal averaging voltage follow
Device, high-power FET, power resistor current detection module and Current cut-off negative feedback module are sequentially connected composition electric current and cut
Only negative feedback links.
3. stage light regulating system according to claim 1, it is characterised in that：The Signal averaging voltage follow
Device, high-power FET, power resistor current detection module and Current Negative Three-Point Capacitance module are sequentially connected composition Current Negative Three-Point Capacitance
Link.
4. stage light regulating system according to claim 1, it is characterised in that：The DSC digital signal controllers,
Pwm control signal controlled division device, Signal averaging voltage follower, high-power FET, power resistor current detection module
It is sequentially connected composition DSC digital signal controller negative feedback links with Current Negative Three-Point Capacitance module.
5. stage light regulating system according to claim 1, it is characterised in that：The DSC digital signal controllers,
Pwm control signal controlled division device, Signal averaging voltage follower, high-power FET, LED light and substrate temperature acquire mould
Block is sequentially connected composition temperature negative feedback links.
6. stage light regulating system according to claim 1, it is characterised in that：The DSC digital signal controllers,
Controlled power voltage-stablizer, anti-oscillation power back-off filter module, LED light, high-power FET, power resistor current detecting mould
Block and Current Negative Three-Point Capacitance module are sequentially connected composition supply voltage negative feedback links.
7. according to claim 1-6 any one of them stage light regulating systems, it is characterised in that：The PWM controls letter
Number controlled division device includes the first controlled electric potential device, and resistor is respectively set in the both ends of the first controlled electric potential device.
8. according to claim 1-6 any one of them stage light regulating systems, it is characterised in that：The controlled power is steady
The controllable voltage-stablizer and the second controlled electric potential device that depressor is connected, the second controlled electric potential device respectively with DSC digital signal controls
Device processed, the connection of anti-oscillation power back-off filter module, resistor is respectively set in the both ends of the second controlled electric potential device.
9. stage light regulating system according to claim 8, it is characterised in that：The controllable voltage-stablizer and second by
It is additionally provided with the Schottky diode and energy storage inductor being connected, second controlled electric potential in connection line between control potentiometer
The output end of device is equipped with filter condenser；
The anti-oscillation power back-off filter module is connect with filter condenser comprising power resistor and the power electricity being in series
Container；
The energy storage inductor and filter condenser of the controlled power voltage-stablizer and the power electricity of hunting power compensation filter module
Resistance and power capacitor constitute controllable resonant and damp LC output filters.
10. the stage light adjusting method based on any one of the claim 1-9 systems, it is characterised in that：The method
Including：
DSC digital signal controllers receive each output channel signal from DMX signaling modules, come from substrate temperature signal respectively
The temperature signal of module and in each output channel Current Negative Three-Point Capacitance module current signal, then to each output channel believe
Number, temperature signal and current signal handled, corresponding control signal is exported to each output channel；
Control signal from DSC digital signal controllers is sent into letter after pwm control signal controlled electric potential device is divided
Number superimposed voltage follower, Signal averaging voltage follower receive the current signal of Current Negative Three-Point Capacitance module simultaneously；
After Signal averaging voltage follower is further processed the control signal after partial pressure according to current signal, final control
Signal processed is delivered to by high-power FET at LED light；
Power resistor current detection module detects the electric current of high power tube output end in real time, is handled by operation amplifier, and electric current is negative
Obtained current signal is fed back to DSC digital signal controllers and Signal averaging voltage follower by feedback module respectively；
After controlled power voltage-stablizer receives the control signal from DSC digital signal controllers, to from DC power supplier
Voltage carries out steady pressure treatment, is delivered at LED light after anti-oscillation power filter module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810699985.XA CN108712802A (en) | 2018-06-29 | 2018-06-29 | Stage light regulating system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810699985.XA CN108712802A (en) | 2018-06-29 | 2018-06-29 | Stage light regulating system and method |
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| CN108712802A true CN108712802A (en) | 2018-10-26 |
Family
ID=63872263
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810699985.XA Pending CN108712802A (en) | 2018-06-29 | 2018-06-29 | Stage light regulating system and method |
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