CN206759787U - A kind of control system of compatible DALI and PWM dimming interfaces - Google Patents
A kind of control system of compatible DALI and PWM dimming interfaces Download PDFInfo
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- CN206759787U CN206759787U CN201720358264.3U CN201720358264U CN206759787U CN 206759787 U CN206759787 U CN 206759787U CN 201720358264 U CN201720358264 U CN 201720358264U CN 206759787 U CN206759787 U CN 206759787U
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Abstract
It the utility model is related to a kind of control system of compatible DALI and PWM dimming interfaces, including the DALI being sequentially connected or PWM controller, DALI and PWM universal circuits and single-chip microcomputer, described DALI and PWM universal circuits include polarity switching, metal-oxide-semiconductor, boostrap circuit and photoelectric coupled circuit, the drain electrode of described metal-oxide-semiconductor is connected with polarity switching, the grid of described metal-oxide-semiconductor is connected with boostrap circuit, the source electrode of described metal-oxide-semiconductor is connected with photoelectric coupled circuit, described polarity switching is connected with DALI or PWM controller, and described photoelectric coupled circuit is connected with single-chip microcomputer.Compared with prior art, the utility model can reduce stock and stock for manufacturer, be purchased for user is convenient.
Description
Technical field
A kind of control system of dimming power source is the utility model is related to, is dimmed more particularly, to a kind of compatible DALI and PWM
The control system of interface.
Background technology
Dimming power source has the brightness adjustment control such as DMX, DALI, PWM and analog signal mode, it is necessary to which different circuit corresponds to.
In these control modes, DALI and PWM are best suitable for doing and transmit over long distances and be not easy controlled number of power sources and line length
Influence, so using large in number and widely distributed, but the logic level of the two compatibility that differs greatly is more difficult, be typically designed to two sets it is independent
Interface circuit, Fig. 1 and Fig. 2 are conventional DALI interface circuit figures, the PWM interface circuit figures that Fig. 3 and Fig. 4 are commonly used.Such as the institute of table 1
Show, the logic level of DALI power interfaces, DALI high level:9.5V-22.5V, DALI low level:- 6.5V-6.5V, frequency:
1.2kHz。
Table 1
Minimum | Typical | Maximum | |
High level voltage | 9.5V | 22.5V | |
Threshold voltage | > 6.5V | 8.0V | < 9.5V |
Low level voltage | -6.5V | 6.5V |
And the representative PWM light modulators of in the market have two kinds, one of which output voltage:11 ± 2Vo-p, frequency:
1kHz, dutycycle:0%~100%;Another output voltage:9 ± 2Vo-p, frequency:1kHz, dutycycle:5 ± 1%~90
± 1%.Wherein the first light modulator and DALI level is substantially compatible, can use Fig. 1 DALI interface hardware circuitries simultaneously.
But 9 ± 2V of logic high of another PWM light modulator is close to the low level upper limit 6.5V of DALI, now if continuing to use
DALI interface hardware circuitries in Fig. 1, the level logic at DALIRX differentiate error-prone, can obscure low and high level.In addition
Different sluggishnesses can be produced with the signal under Fig. 1 circuit varying levels, MCU can not accomplish compensating approach in each point.Except above-mentioned
The outer two kinds of interface circuits of shortcoming correspond to different components, PCB and power supply model, are not easy to stock up, produce, application and popularization.
Utility model content
The purpose of this utility model is exactly to provide a kind of compatible DALI the defects of overcoming above-mentioned prior art to exist
With the control system of PWM dimming interfaces.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of control system of compatible DALI and PWM dimming interfaces, including be sequentially connected DALI or PWM controller,
DALI and PWM universal circuits and single-chip microcomputer, described DALI and PWM universal circuits include polarity switching, metal-oxide-semiconductor, from
Lift circuit and photoelectric coupled circuit, the drain electrode of described metal-oxide-semiconductor are connected with polarity switching, the grid of described metal-oxide-semiconductor and bootstrapping
Circuit is connected, and the source electrode of described metal-oxide-semiconductor is connected with photoelectric coupled circuit, described polarity switching and DALI or PWM controller
Connection, described photoelectric coupled circuit are connected with single-chip microcomputer.
Described photoelectric coupled circuit includes photoelectrical coupler and the resistance being connected in parallel on photoelectrical coupler.
Described boostrap circuit is connected after passing sequentially through rectification circuit, mu balanced circuit with the grid of metal-oxide-semiconductor.
Described polarity switching includes polarization converting unit and voltage drop unit is managed.
The MCU being connected with photoelectric coupled circuit is provided with described single-chip microcomputer.
Compared with prior art, the utility model has advantages below:It can reduce stock and stock for manufacturer,
It it is when client needs PWM control modes upgrading to DALI control modes convenient the advantages of purchasing, especially protruding for user
When, as long as upgrading control box without transforming light engineering again.
Brief description of the drawings
Fig. 1 is conventional DALI interface circuit figures;
Fig. 2 is conventional DALI interface circuit block diagrams;
Fig. 3 is old PWM interface circuit figures;
Fig. 4 is old PWM interface circuit block diagrams;
Fig. 5 is structured flowchart of the present utility model;
Fig. 6 is DALI and PWM universal circuits figure of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is part of the embodiment of the present utility model, rather than is all implemented
Example.Based on the embodiment in the utility model, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment obtained, it should all belong to the scope of the utility model protection.
As shown in Figure 5 and Figure 6, a kind of control system of compatible DALI and PWM dimming interfaces, including the DALI being sequentially connected
Or PWM controller 1, DALI and PWM universal circuits 2 and single-chip microcomputer 3, described DALI and PWM universal circuits 2 turn including polarity
Circuit 21, metal-oxide-semiconductor 22, boostrap circuit 23 and photoelectric coupled circuit are changed, drain electrode and the polarity switching 21 of described metal-oxide-semiconductor 22 connect
Connect, the grid of described metal-oxide-semiconductor 22 is connected with boostrap circuit 23, and the source electrode of described metal-oxide-semiconductor 22 is connected with photoelectric coupled circuit, described
Polarity switching be connected with DALI or PWM controller, described photoelectric coupled circuit is connected with single-chip microcomputer.
Described photoelectric coupled circuit includes photoelectrical coupler and the resistance being connected in parallel on photoelectrical coupler.
Described boostrap circuit is connected after passing sequentially through rectification circuit, mu balanced circuit with the grid of metal-oxide-semiconductor;Described bootstrapping
VGS voltage liftings turn on mos pipes by circuit after an one number time is set, and will be greater than the signal of 7V high level through over commutation
At circuit and mos tube grids after mu balanced circuit voltage stabilizing, the source voltage of mos pipes is stablized in a fixed value 6V, will be greater than this electricity
The signal of pressure value is all cut away.
Described polarity switching includes polarization converting unit and voltage drop unit, the DALI signals or pwm signal of input
The pressure drop for carrying out 1V by voltage drop unit after polarization converting unit is changed is handled.It is provided with described single-chip microcomputer and optocoupler electricity
The MCU of road connection, the difference of MCU analysis and Control signals using judging in advance by the way of is so as to judging the control mould of power supply use
Formula.
(1) interface circuit is adjudicated using voltage difference and adjudicates interface circuit to substitute old level.Fig. 5 and Fig. 6 be in order to
Realize the designed new hardware interface circuit of DALI/PWM light modulations.Compared with old DALI interface hardware circuitries, general electricity
Polarity switching, bootstrap module, Voltage stabilizing module and overvoltage crowbar etc. are added in road.This universal circuit can be by before
DALI high level:9.5V-22.5V, low level:Level judgements different 9 ± 2V of -6.5V-6.5V and PWM are unified for level
Difference judgement, solve both level logic othernesses, wherein table 2 is DALI and PWM logic levels, dutycycle, baud rate contrast
Table.
Table 2
First, DALI signals and pwm signal first pass through the pressure drop for having individual 1V or so after dipole inversion, when electric between mos Vgs
When pressure is more than 2.5V or so, mos pipes conducting, electric current can just pass through optocoupler, DALIRX output high level signals;When input signal electricity
Flat as little as optocoupler electric current all flows through resistance connected in parallel, and optocoupler is not turned on, DALIRX output low level signals.Boostrap circuit exists
Turn on mos VGS voltage liftings after several cycles, and will be greater than the signal of 7V high level at through over commutation and mos gate poles
After 9.1V voltage-stabiliser tube voltage stabilizings, the S pole tensions of mos pipes are stablized in fixed value 6V or so, will be greater than the signal of this magnitude of voltage all
Cut away.So as to obtain a fixed current value for flowing through optocoupler, make the signal that single-chip microcomputer receives and DALI/PWM controllers
Send signal and form a fixed sluggishness, this sluggishness fixed can be compensated by MCU.
(2) MCU uses pre- judgment mode.In order to coordinate new DALI/PWM hardware interface circuits, single-chip microcomputer is using anticipation
The difference of disconnected mode analysis and Control signal so as to judge power supply use control model.It is electric and not defeated power supply is firm
When entering signal, power supply default control mode is control mode when shutting down last time;When there is input signal to come in, single-chip microcomputer can be sentenced
It is disconnected whether when be DALI signals, if DALI signals and when to detect signal value be not FFFF, single-chip microcomputer is by power supply mould
Formula is arranged to DALI, and closes PWM capturing functions.If DALI signals and when to detect signal value be FFFF, single-chip microcomputer pair
PWM ignores counting increase, if increasing to threshold value, single-chip microcomputer starts to calculate PWM cycle and dutycycle, and detects continuous-stable
Cycle, signal is arranged to pwm signal.If not detecting the cycle of continuous-stable, single-chip microcomputer restarts detection letter
Number;If PWM ignores counting without threshold value is arrived, single-chip microcomputer also restarts detection signal.
(3) MCU calibrates to error caused by compatibility interface.DALI signals and pwm signal are all the relatively low squares of frequency
Shape ripple, the length of transmission range Bu Tong only can influence the amplitude of square wave without influenceing its frequency and duty with number of power sources
Than.But new interface hardware circuitry can cause output signal and input signal to produce a sluggishness, such as in (1) the DALI that says believe
Number and pwm signal first pass through dipole inversion, the S pole tensions of mos pipes are stable in fixed value 6V or so, flowed into again after voltage stabilizing
Into optocoupler.Because optocoupler both end voltage value fixation is so as to obtain a fixed current value for flowing through optocoupler, connect single-chip microcomputer
The signal and DALI/PWM controllers being subject to send signal and form a fixed duty cycle deviation, because this deviation will not be with signal
The height change of level, this sluggishness fixed can be by MCU compensating approach, and the signal for making to collect on final MCU is in frequency
Be equal to the signal that voltage input sends in terms of dutycycle.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in various in the technical scope that the utility model discloses
Equivalent modifications or substitutions, these modifications or substitutions should all cover within the scope of protection of the utility model.Therefore, this practicality
New protection domain should be defined by scope of the claims.
Claims (5)
1. a kind of control system of compatible DALI and PWM dimming interfaces, it is characterised in that including the DALI or PWM being sequentially connected
Controller, DALI and PWM universal circuits and single-chip microcomputer, described DALI and PWM universal circuits include polarity switching,
Metal-oxide-semiconductor, boostrap circuit and photoelectric coupled circuit, the drain electrode of described metal-oxide-semiconductor are connected with polarity switching, the grid of described metal-oxide-semiconductor
Pole is connected with boostrap circuit, and the source electrode of described metal-oxide-semiconductor is connected with photoelectric coupled circuit, described polarity switching and DALI or
PWM controller is connected, and described photoelectric coupled circuit is connected with single-chip microcomputer.
2. control system according to claim 1, it is characterised in that described photoelectric coupled circuit include photoelectrical coupler and
The resistance being connected in parallel on photoelectrical coupler.
3. control system according to claim 1, it is characterised in that described boostrap circuit pass sequentially through rectification circuit,
It is connected after mu balanced circuit with the grid of metal-oxide-semiconductor.
4. control system according to claim 1, it is characterised in that described polarity switching includes dipole inversion list
Member and voltage drop unit.
5. control system according to claim 1, it is characterised in that be provided with described single-chip microcomputer and be connected with photoelectric coupled circuit
MCU.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108696971A (en) * | 2017-04-07 | 2018-10-23 | 上海鸣志自动控制设备有限公司 | The control system and method for compatible DALI and PWM dimming interfaces |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108696971A (en) * | 2017-04-07 | 2018-10-23 | 上海鸣志自动控制设备有限公司 | The control system and method for compatible DALI and PWM dimming interfaces |
CN108696971B (en) * | 2017-04-07 | 2024-02-20 | 上海鸣志自动控制设备有限公司 | Control method of control system compatible with DALI and PWM dimming interface |
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