CN107295730A - A kind of method that single live wire sends the brightness control signal of the multiple LEDs of control - Google Patents

一种单火线发送控制多个LED灯的亮度控制信号的方法，由单火线电源模块、单片机控制模块、移相驱动模块、过零检测模块、亮度给定模块组成的壁控开关单元实现，可以独立控制调节多个LED灯的亮度。亮度改变时，壁控开关单元发送采用移相触发控制的、由引导波形、地址波形和数据波形组成的亮度控制信号，亮度控制信号中包括2位三进制地址码数据和2位三进制亮度数据。不发出亮度控制信号时，单火线上的电压波形为连续完整的单相正弦波。所述壁控LED灯调光方法无需遥控器，无需单独敷设控制线，也不用重新敷设电源线，可以实现普通照明灯的替代升级。

A method for sending and controlling brightness control signals of multiple LED lamps by a single fire wire, which is realized by a wall control switch unit composed of a single fire wire power supply module, a single-chip microcomputer control module, a phase-shifting drive module, a zero-crossing detection module, and a brightness setting module. Independent controls adjust the brightness of multiple LED lights. When the brightness changes, the wall control switch unit sends a brightness control signal that is controlled by a phase-shift trigger and is composed of a pilot waveform, an address waveform and a data waveform. The brightness control signal includes 2-digit ternary address code data and 2-digit ternary Brightness data. When the brightness control signal is not issued, the voltage waveform on the single live line is a continuous and complete single-phase sine wave. The dimming method of the wall-controlled LED lamp does not require a remote controller, does not need to lay separate control lines, and does not need to re-lay power lines, and can realize the replacement and upgrading of ordinary lighting lamps.

一种单火线发送控制多个LED灯的亮度控制信号的方法A method for sending brightness control signals for controlling multiple LED lamps through a single fire wire

本发明专利申请为分案申请，原案申请号为201510229100.6，申请日为2015年5月8日，发明名称为一种单火线远距离控制多个LED灯亮度的方法。The patent application of the present invention is a divisional application, the original application number is 201510229100.6, and the application date is May 8, 2015. The title of the invention is a method for remotely controlling the brightness of multiple LED lights with a single live wire.

技术领域technical field

本发明涉及一种照明灯控制技术，尤其是一种单火线发送控制多个LED灯的亮度控制信号的方法。The invention relates to an illuminating lamp control technology, in particular to a method for sending brightness control signals for controlling multiple LED lamps through a single live wire.

背景技术Background technique

由于LED灯的非线性特性，LED灯的亮度不能采用调节电压的方式来实现。Due to the nonlinear characteristics of LED lamps, the brightness of LED lamps cannot be realized by adjusting the voltage.

采用可控恒流源来调节LED灯的亮度时，工作电流的改变会带来LED灯的色谱偏移，同时，低亮度下LED灯负载电流也变得很低，会使可控恒流源效率降低及温升增高，损耗在驱动芯片上的功耗越大，从而会损害恒流源及LED光源的寿命。When using a controllable constant current source to adjust the brightness of the LED lamp, the change of the working current will cause the color shift of the LED lamp. At the same time, the load current of the LED lamp becomes very low under low brightness, which will make the controllable constant current source The lower the efficiency and the higher the temperature rise, the greater the power consumption on the driver chip will be, which will damage the life of the constant current source and the LED light source.

采用PWM(脉宽调制)调光方式控制LED灯亮度，可以避免调压方式和调电流方式带来的问题。目前常用的LED灯调光方法有三种：Using PWM (pulse width modulation) dimming method to control the brightness of LED lights can avoid the problems caused by voltage regulation and current regulation. There are three commonly used dimming methods for LED lights:

一是采用遥控器控制。LED灯控制电路装有遥控器接收装置，可以通过遥控器对LED灯进行有级调光或者是无级调光，其缺点是一个LED灯需要配备一个遥控器，造成遥控器数量多，管理麻烦，成本也偏高。One is to use remote control. The LED light control circuit is equipped with a remote control receiving device, and the LED light can be dimmed step by step or steplessly dimmable through the remote control. The disadvantage is that one LED light needs to be equipped with a remote control, resulting in a large number of remote controls and troublesome management. , and the cost is also high.

二是采用数字控制技术。例如，采用DALI(数字可寻址的照明接口)技术，DALI系统软件可对同一强电回路或不同回路上的单个或多个LED灯具进行独立寻址，通过DALI系统软件对单灯或任意的灯组进行精确的调光及开关控制。该方案技术先进，但成本很高，系统除需要布设电力线外，还需要布设控制线。The second is the use of digital control technology. For example, using DALI (Digital Addressable Lighting Interface) technology, DALI system software can independently address single or multiple LED lamps on the same strong current circuit or on different circuits, and use DALI system software to The light group can be precisely dimmed and switched on and off. This solution is advanced in technology, but the cost is very high. In addition to the power line, the system also needs to lay out the control line.

三是采用单火线开关通断控制技术。例如，采用NU102专用芯片，即可利用普通墙面开关在规定的时间内的开关动作，实现LED灯的亮度调节。但该方法只能提供4档LED灯的调节亮度，且开关动作有时间要求。The third is to adopt the single live wire switch on-off control technology. For example, using the NU102 dedicated chip, the brightness adjustment of the LED lamp can be realized by using the switch action of the ordinary wall switch within the specified time. However, this method can only provide 4 levels of adjustable brightness of LED lights, and the switching action has a time requirement.

发明内容Contents of the invention

本发明的目的旨在提供一种在不改变现有照明线路布线的情况下，利用单火线发送对多个LED灯进行调光的亮度控制信号的方法。The purpose of the present invention is to provide a method for sending a brightness control signal for dimming multiple LED lamps by using a single live wire without changing the wiring of the existing lighting circuit.

为达到上述目的，本发明采取的技术方案是：一种单火线发送控制多个LED灯的亮度控制信号的方法，由壁控开关单元实现，用于控制K个LED灯的亮度，K为大于等于1，小于等于9的整数；所述壁控开关单元设有单火线输入端、单火线输出端；所述单火线输入端连接至交流电源火线；K个LED灯的亮度分别由K个LED灯调节驱动单元控制，LED灯调节驱动单元设有火线输入端、零线输入端；所述K个LED灯调节驱动单元的火线输入端都连接至壁控开关单元的单火线输出端、零线输入端都连接至交流电源零线；所述交流电源为单相220V交流电。In order to achieve the above object, the technical solution adopted by the present invention is: a method for sending and controlling brightness control signals of multiple LED lamps by a single live wire, which is realized by a wall control switch unit and used to control the brightness of K LED lamps, where K is greater than equal to 1, an integer less than or equal to 9; the wall control switch unit is provided with a single live wire input terminal and a single live wire output terminal; the single live wire input terminal is connected to the live wire of the AC power supply; the brightness of the K LED lights is determined by the K LED lights Controlled by the lamp adjustment drive unit, the LED lamp adjustment drive unit is provided with a live wire input terminal and a neutral wire input terminal; the live wire input terminals of the K LED lamp adjustment drive units are all connected to the single live wire output terminal and the neutral wire of the wall control switch unit The input terminals are all connected to the neutral line of the AC power supply; the AC power supply is a single-phase 220V AC power.

所述壁控开关单元由单火线电源模块、单片机控制模块、移相驱动模块、过零检测模块、亮度给定模块组成。The wall control switch unit is composed of a single live wire power supply module, a single-chip microcomputer control module, a phase-shift drive module, a zero-crossing detection module, and a brightness setting module.

所述LED灯调节驱动单元由单片机调节模块、LED驱动模块组成。The LED lamp adjusting and driving unit is composed of a single-chip microcomputer adjusting module and an LED driving module.

所述壁控开关单元通过控制单火线输出端输出的电压波形来发送亮度控制信号，其方法是，The wall control switch unit sends the brightness control signal by controlling the voltage waveform output by the single fire wire output terminal, and the method is as follows:

步骤A，判断是否关闭LED灯，是则关闭LED灯，进入关闭LED灯状态，转到步骤D；否则为非关闭LED灯状态，转到步骤B；Step A, judge whether to turn off the LED light, if yes, turn off the LED light, enter the state of turning off the LED light, and go to step D; otherwise, it is in the state of not turning off the LED light, go to step B;

步骤B，确定亮度控制信号的地址码与亮度等级；Step B, determining the address code and brightness level of the brightness control signal;

步骤C，发出一次亮度控制信号；Step C, sending out a brightness control signal;

步骤D，判断亮度给定信号是否发生改变，亮度给定信号发生改变，返回步骤A；亮度给定信号没有发生改变，返回步骤C。Step D, judging whether the given brightness signal changes, if the given brightness signal changes, return to step A; if the given brightness signal does not change, return to step C.

所述维持不发出亮度控制信号状态，当处在关闭LED灯状态时，单火线输出端流过微电流；所述维持不发出亮度控制信号状态，当处在非关闭LED灯状态时，单火线输出端输出的电压波形为连续完整的单相正弦波。In the state of maintaining no brightness control signal, when the LED light is turned off, the output terminal of the single live wire flows through a microcurrent; in the state of maintaining the brightness control signal not issued, when the LED light is not turned off, the single live wire The voltage waveform output by the output terminal is a continuous and complete single-phase sine wave.

所述发出一次亮度控制信号，包括顺序发出引导波形、地址波形和数据波形。The sending out the brightness control signal once includes sending out the pilot waveform, the address waveform and the data waveform in sequence.

所述引导波形由一个不导通的负半波，紧接一个完整导通的正半波组成；所述引导波形也可以由一个不导通的完整周波，紧接一个完整导通的正半波组成。The guiding waveform consists of a non-conducting negative half-wave followed by a completely conducting positive half-wave; the guiding waveform can also consist of a non-conducting complete cycle followed by a completely conducting positive half-wave wave composition.

所述地址波形由一个周波的移相波形组成，负半波为移相角γ₁，正半波为移相角γ0。The address waveform is composed of a phase-shifted waveform of one cycle, the negative half-wave is the phase-shift angle γ ₁ , and the positive half-wave is the phase-shift angle γ0.

所述数据波形由一个周波的移相波形组成，负半波为移相角β₁，正半波为移相角β0。The data waveform is composed of a phase-shifted waveform of one cycle, the negative half-wave is the phase-shift angle β ₁ , and the positive half-wave is the phase-shift angle β0.

所述移相角γ₁、移相角γ₀、移相角β₁、移相角β₀的值可以分别为移相角α₂、α₁、α₀中的一个，移相角α₂、α₁、α₀分别对应三进制数码值2、1、0。所述移相角α₂、α₁、α₀满足α₂<α₁<α₀的关系，典型值是α₂＝30°，α₁＝60°，α₀＝90°。The values of the phase shift angle γ ₁ , phase shift angle γ ₀ , phase shift angle β ₁ , and phase shift angle β ₀ can be one of the phase shift angles α ₂ , α ₁ , and α ₀ respectively, and the phase shift angle α ₂ , α ₁ , and α ₀ correspond to the ternary digital values 2, 1, and 0, respectively. The phase shift angles α ₂ , α ₁ , and α ₀ satisfy the relationship of α ₂ <α ₁ <α ₀ , and typical values are α ₂ =30°, α ₁ =60°, and α ₀ =90°.

所述LED灯调节驱动单元可以进行地址码设定，地址码由2位三进制数据表示。The LED light adjusting drive unit can set an address code, and the address code is represented by 2-digit ternary data.

所述LED灯的亮度等级由2位三进制亮度数据表示。The brightness level of the LED lamp is represented by 2-digit ternary brightness data.

所述LED灯调节驱动单元由单片机调节模块接收亮度控制信号并控制亮度，其方法是，The LED lamp adjustment drive unit receives the brightness control signal by the single-chip microcomputer adjustment module and controls the brightness, and the method is as follows:

步骤一，初始化，控制LED灯为初始亮度；Step 1, initialization, control the LED light to the initial brightness;

步骤二，判断单火线上是否有亮度控制信号；没有亮度控制信号，返回步骤二；有亮度控制信号，转到步骤三；Step 2. Determine whether there is a brightness control signal on the single live line; if there is no brightness control signal, return to step 2; if there is a brightness control signal, go to step 3;

步骤三，接收亮度控制信号，得到2位三进制地址码和2位三进制亮度数据；Step 3, receiving the brightness control signal to obtain a 2-digit ternary address code and a 2-digit ternary brightness data;

步骤四，判断是否为目标LED灯；不是目标LED灯，返回步骤二；是目标LED灯，转到步骤五；Step 4, judge whether it is the target LED light; if it is not the target LED light, return to step 2; if it is the target LED light, go to step 5;

步骤五，改变LED灯亮度，返回步骤二。Step five, change the brightness of the LED light, return to step two.

所述判断单火线上是否有亮度控制信号，方法为判断单火线上是否有亮度控制信号的引导波形。The method of judging whether there is a brightness control signal on the single live line is to judge whether there is a guide waveform of the brightness control signal on the single live line.

所述接收亮度控制信号，得到2位三进制地址码和2位三进制亮度数据，方法为方法为依次测量地址波形、数据波形的负半波导通角、正半波导通角，计算得到负半波移相角和正半波移相角后，再转换成2位三进制地址码和2位三进制亮度数据。The brightness control signal is received to obtain a 2-digit ternary address code and a 2-digit ternary brightness data. The method is to sequentially measure the negative half-wave conduction angle and the positive half-wave conduction angle of the address waveform and the data waveform, and calculate and obtain After negative half-wave phase shift angle and positive half-wave phase shift angle, it is converted into 2-digit ternary address code and 2-digit ternary brightness data.

所述判断是否为目标LED灯，方法是判断接收到的2位三进制地址码是否与本LED灯调节驱动单元设定的2位三进制地址码相符合；相符合，是目标LED灯；不相符合，不是目标LED灯。The method of judging whether it is the target LED lamp is to judge whether the received 2-digit ternary address code matches the 2-digit ternary address code set by the LED lamp adjustment drive unit; if it matches, it is the target LED lamp. ; Does not match, not the target LED light.

所述改变LED灯亮度，由单片机调节模块改变连接至LED灯调节驱动单元的PWM亮度调节信号的占空比实现。The changing of the brightness of the LED lamp is realized by changing the duty cycle of the PWM brightness adjustment signal connected to the LED lamp adjustment drive unit by the single-chip microcomputer adjustment module.

所述移相角β₁为2位三进制亮度数据的高位，移相角β₀为2位三进制亮度数据的低位；所述移相角γ₁为2位三进制地址码的高位，移相角γ₀为2位三进制地址码的低位。The phase shift angle β ₁ is the high bit of the 2-bit ternary brightness data, the phase shift angle β ₀ is the low bit of the 2-bit ternary brightness data; the phase shift angle γ ₁ is the high bit of the 2-bit ternary address code The high bit, the phase shift angle γ ₀ is the low bit of the 2-bit ternary address code.

所述LED灯的亮度等级由2位三进制亮度数据表示，具体为，亮度等级分别是亮度1－9，亮度1－9依次与2位三进制亮度数据00、01、02、10、11、12、20、21、22对应。The brightness level of the LED lamp is represented by 2-digit ternary brightness data, specifically, the brightness levels are respectively brightness 1-9, and brightness 1-9 is sequentially combined with 2-digit ternary brightness data 00, 01, 02, 10, 11, 12, 20, 21, 22 correspond.

所述发出引导波形，方法是，单片机控制模块随机停止触发信号输出，等待过零检测模块输出的过零信号；在过零信号的下降沿处发出一个不超过10ms的触发脉冲。The method of sending out the guide waveform is that the single-chip control module randomly stops the output of the trigger signal, waits for the zero-crossing signal output by the zero-crossing detection module; and sends a trigger pulse of no more than 10ms at the falling edge of the zero-crossing signal.

所述过零信号在单片机控制模块随机停止触发信号输出后产生，是与交流电源负半波对应且宽度接近10ms的正脉冲。The zero-crossing signal is generated after the single-chip microcomputer control module randomly stops outputting the trigger signal, and is a positive pulse corresponding to the negative half-wave of the AC power supply with a width close to 10 ms.

所述LED灯处在关闭状态时，单片机控制模块停止输出触发信号。When the LED light is in the off state, the single-chip microcomputer control module stops outputting the trigger signal.

所述单火线电源模块具有单火线关态取电功能和开态取电功能，用于向壁控开关单元提供工作电源。The single live wire power supply module has the function of taking power from the off state and the power from the on state of the single live wire, and is used to provide working power to the wall control switch unit.

所述过零检测模块为半波整流分压电路，能够检测所述交流电源的过零信号，并提供给单片机控制模块。The zero-crossing detection module is a half-wave rectification and voltage dividing circuit, which can detect the zero-crossing signal of the AC power supply and provide it to the single-chip microcomputer control module.

所述亮度给定模块能够提供K个亮度给定信号给单片机控制模块。The brightness setting module can provide K brightness setting signals to the single-chip microcomputer control module.

所述移相驱动模块为双向晶闸管交流移相电路。The phase-shift driving module is a bidirectional thyristor AC phase-shift circuit.

所述单片机控制模块依据亮度给定信号，发出触发信号控制移相驱动模块向K个LED灯调节驱动单元供电，并向K个LED灯调节驱动单元发出亮度控制信号。The single-chip microcomputer control module sends a trigger signal to control the phase-shifting drive module to supply power to the K LED lamp adjustment drive units according to the brightness given signal, and sends a brightness control signal to the K LED lamp adjustment drive units.

所述LED驱动模块设有交流输入端和LED灯驱动端，其中，交流输入端连接至LED灯调节驱动单元的火线输入端和零线输入端，LED灯驱动端连接至LED灯。The LED driving module is provided with an AC input terminal and an LED lamp driving terminal, wherein the AC input terminal is connected to the live wire input terminal and the neutral wire input terminal of the LED lamp adjusting drive unit, and the LED lamp driving terminal is connected to the LED lamp.

所述LED驱动模块还设有PWM亮度调节信号输入端。The LED drive module is also provided with a PWM brightness adjustment signal input terminal.

所述单片机调节模块包括有调节单片机、正半波整流整形电路、负半波整流整形电路和整流稳压电路，设有交流输入端、PWM亮度调节信号输出端；所述交流输入端连接至LED灯调节驱动单元的火线输入端和零线输入端，PWM亮度调节信号输出端连接至LED驱动模块的PWM亮度调节信号输入端；所述正半波整流整形电路和负半波整流整形电路分别对火线输入端输入的交流电压进行正半波整流整形和负半波整流整形；所述正半波整流整形电路的输出、负半波整流整形电路的输出分别连接至调节单片机不同的脉冲捕捉输入端。The single-chip microcomputer adjustment module includes an adjustment single-chip microcomputer, a positive half-wave rectification and shaping circuit, a negative half-wave rectification and shaping circuit, and a rectification and voltage stabilization circuit, and is provided with an AC input terminal and a PWM brightness adjustment signal output terminal; the AC input terminal is connected to the LED The live line input terminal and the neutral line input terminal of the lamp adjustment drive unit, and the PWM brightness adjustment signal output end are connected to the PWM brightness adjustment signal input end of the LED drive module; the positive half-wave rectification and shaping circuit and the negative half-wave rectification and shaping circuit respectively The AC voltage input by the live wire input terminal is subjected to positive half-wave rectification and shaping and negative half-wave rectification and shaping; the output of the positive half-wave rectification and shaping circuit and the output of the negative half-wave rectification and shaping circuit are respectively connected to different pulse capture input ends of the regulating single-chip microcomputer .

所述判断单火线上是否有亮度控制信号的引导波形，方法为判断负半波整流整形电路输出的波形有负半波脉冲缺失，且接下来的正半波整流整形电路输出的正半波波形完整。The method of judging whether there is a guide waveform of the brightness control signal on the single live line is to judge that the waveform output by the negative half-wave rectification and shaping circuit has a negative half-wave pulse missing, and the positive half-wave waveform output by the next positive half-wave rectification and shaping circuit whole.

本发明的有益效果是，采用单火线方式控制多个LED灯亮度，无需遥控器，无需控制线，也不用重新敷设电源线，可以实现普通照明灯的替代升级与改造；LED灯亮度调节共分9档，采用旋钮装置调节，符合操作习惯；单火线上的亮度控制信号仅仅是在改变亮度时进行短时发送，不发出亮度控制信号时，单火线输出端输出的电压波形为连续完整的单相正弦波，没有谐波；具有单火线电子开关关灯功能。The beneficial effect of the present invention is that the brightness of a plurality of LED lamps is controlled by a single live wire, without a remote control, without a control line, and without re-laying power lines, and the replacement, upgrade and transformation of ordinary lighting lamps can be realized; the brightness adjustment of LED lamps can be divided into 9 levels, adjusted by the knob device, in line with operating habits; the brightness control signal on the single live wire is only sent for a short time when changing the brightness, when the brightness control signal is not sent, the voltage waveform output by the single live wire output terminal is a continuous and complete single Phase sine wave, no harmonics; it has the function of turning off the light with a single live wire electronic switch.

附图说明Description of drawings

图1是系统实施例结构框图。Fig. 1 is a structural block diagram of a system embodiment.

图2是壁控开关单元实施例结构图。Fig. 2 is a structural diagram of an embodiment of a wall control switch unit.

图3是壁控开关单元实施例电路图。Fig. 3 is a circuit diagram of an embodiment of a wall control switch unit.

图4是三进制对应的α角示意图。Fig. 4 is a schematic diagram of the α angle corresponding to the ternary system.

图5是发送一次亮度控制信号的波形示例图1。Fig. 5 is a waveform example Fig. 1 for sending a brightness control signal once.

图6是发送一次亮度控制信号的波形示例图2。Fig. 6 is a waveform example Fig. 2 for sending a brightness control signal once.

图7是亮度控制信号发送控制方法。Fig. 7 is a control method for sending a brightness control signal.

图8是LED灯调节驱动单元结构图。Fig. 8 is a structural diagram of the LED lamp adjustment drive unit.

图9是单片机调节模块实施例电路图。Fig. 9 is a circuit diagram of an embodiment of the single-chip microcomputer adjustment module.

图10是LED驱动模块实施例电路图。Fig. 10 is a circuit diagram of an embodiment of an LED driving module.

图11是亮度控制调节方法。Fig. 11 is a brightness control adjustment method.

具体实施方式detailed description

下面通过附图并结合实施例对本发明作进一步详细的描述，但本发明的实施方式不限于此。The present invention will be described in further detail below with reference to the accompanying drawings and examples, but the embodiments of the present invention are not limited thereto.

实现本发明方法的装置由壁控开关单元和多个LED灯调节驱动单元组成。壁控开关单元单火线AC进，单火线AC1出。多个LED灯调节驱动单元并联后，火线AC1进，零线N出。有4个LED灯调节驱动单元的装置的实施例如图1所示，4个LED灯调节驱动单元分别为1－4#LED灯调节驱动单元，分别控制调节4个LED灯的亮度；如果需要增加LED灯调节驱动单元，增加的LED灯调节驱动单元与1－4#LED灯调节驱动单元并联。The device for realizing the method of the present invention is composed of a wall control switch unit and a plurality of LED lamp adjustment drive units. The wall control switch unit has a single live wire AC input and a single live wire AC1 output. After multiple LED lamp adjustment drive units are connected in parallel, the live wire AC1 enters and the neutral wire N exits. The embodiment of the device with 4 LED lamp adjustment drive units is shown in Figure 1. The 4 LED lamp adjustment drive units are respectively 1-4# LED lamp adjustment drive units, which respectively control and adjust the brightness of the 4 LED lamps; if necessary, add The LED lamp adjustment drive unit, the additional LED lamp adjustment drive unit is connected in parallel with the 1-4# LED lamp adjustment drive unit.

壁控开关单元实施例结构如图2所示，由单火线电源模块、单片机控制模块、移相驱动模块、过零检测模块、亮度给定模块组成。单火线电源模块具有单火线关态取电功能，也具有开态取电功能，用于向壁控开关单元提供工作电源。The structure of an embodiment of the wall control switch unit is shown in Figure 2, which consists of a single live wire power supply module, a single-chip microcomputer control module, a phase-shifting drive module, a zero-crossing detection module, and a brightness setting module. The single live wire power supply module has the function of taking power from the off state of the single live wire, and also has the function of taking power from the on state, which is used to provide working power to the wall control switch unit.

过零检测模块检测的交流电源过零信号被送给单片机控制模块，亮度给定模块提供所有LED灯的亮度给定信号给单片机控制模块。单片机控制模块依据亮度给定信号，控制移相驱动模块向所有LED灯调节驱动单元供电，并向所有LED灯调节驱动单元发出亮度控制信号。The AC power zero-crossing signal detected by the zero-crossing detection module is sent to the single-chip microcomputer control module, and the brightness given module provides brightness given signals of all LED lamps to the single-chip microcomputer control module. The single-chip microcomputer control module controls the phase-shifting drive module to supply power to all LED lamp adjustment drive units according to the brightness given signal, and sends brightness control signals to all LED lamp adjustment drive units.

控制4个LED灯调节驱动单元的壁控开关单元的实施例电路如图3所示。An embodiment circuit of the wall control switch unit controlling the four LED lamp adjustment drive units is shown in FIG. 3 .

单火线电源模块由单火线稳压器U1及其外围元件二极管D1、电容C1、电容C2、电感L1、电感L2，以及低压差稳压器U2及其外围元件电容C3、电容C4组成。单火线稳压器U1的型号为MP-6V-02S，低压差稳压器U2的型号为HT7233。The single live wire power supply module consists of a single live wire regulator U1 and its peripheral components diode D1, capacitor C1, capacitor C2, inductor L1, inductor L2, and a low dropout voltage regulator U2 and its peripheral components capacitor C3 and capacitor C4. The model of the single live wire regulator U1 is MP-6V-02S, and the model of the low dropout regulator U2 is HT7233.

单火线输入端AC是壁控开关单元的模拟地，连接至单火线稳压器U1的交流电压公共端COM；电容C1的两端分别连接至单火线稳压器U1的滤波电容输入端FIL和交流电压公共端COM；单火线稳压器U1的直流输出电压地GND端为壁控开关单元的数字地，电感L2的两端分别连接至壁控开关单元的数字地和模拟地；二极管D1、电感L1和电容C2组成半波整流滤波电路，半波整流滤波电路的输入连接至单火线输出端AC1、输出连接至单火线稳压器U1的直流高压输入端HDC。单火线稳压器U1还设有直流电压输出端VCC、交流电压端AC。The single live wire input terminal AC is the analog ground of the wall control switch unit, which is connected to the AC voltage common terminal COM of the single live wire regulator U1; the two ends of the capacitor C1 are respectively connected to the filter capacitor input terminals FIL and The AC voltage common terminal COM; the GND terminal of the DC output voltage of the single live wire regulator U1 is the digital ground of the wall control switch unit, and the two ends of the inductance L2 are respectively connected to the digital ground and the analog ground of the wall control switch unit; diodes D1, The inductor L1 and the capacitor C2 form a half-wave rectification filter circuit, the input of the half-wave rectification filter circuit is connected to the single live wire output terminal AC1, and the output is connected to the DC high voltage input terminal HDC of the single live wire regulator U1. The single live wire regulator U1 is also provided with a DC voltage output terminal VCC and an AC voltage terminal AC.

低压差稳压器U2的输入端VIN连接至单火线稳压器U1的直流电压输出端VCC，输出端VOUT输出+3.3V的直流工作电源VDD；单火线稳压器U1的地端GND连接至壁控开关单元的数字地；电容C3、电容C4分别为低压差稳压器U2的输入电压、输出电压滤波电容。The input terminal VIN of the low dropout voltage regulator U2 is connected to the DC voltage output terminal VCC of the single live wire regulator U1, and the output terminal VOUT outputs +3.3V DC operating power supply VDD; the ground terminal GND of the single live wire voltage regulator U1 is connected to The digital ground of the wall control switch unit; capacitor C3 and capacitor C4 are the input voltage and output voltage filter capacitors of the low dropout voltage regulator U2 respectively.

移相驱动模块为双向晶闸管交流移相电路，由双向晶闸管V1、可控硅输出光耦U3、电阻R1、电阻R2、电阻R3组成，可控硅输出光耦U3的型号为MOC3053。双向晶闸管V1的两个阳极端分别连接至单火线输出端AC1和单火线稳压器U1的交流电压端AC；电阻R1并联在双向晶闸管V1的两个阳极端；可控硅输出光耦U3的输出可控硅与电阻R2串联，其串联支路连接至双向晶闸管V1的第一阳极和控制极；可控硅输出光耦U3的输入发光二极管与电阻R3串联，其串联支路一端连接至直流工作电源VDD，另外一端为触发信号输入端。The phase-shift drive module is a bidirectional thyristor AC phase-shift circuit, which is composed of a bidirectional thyristor V1, a thyristor output optocoupler U3, a resistor R1, a resistor R2, and a resistor R3. The model of the thyristor output optocoupler U3 is MOC3053. The two anode terminals of the bidirectional thyristor V1 are respectively connected to the single live wire output terminal AC1 and the AC voltage terminal AC of the single live wire voltage regulator U1; the resistor R1 is connected in parallel to the two anode terminals of the bidirectional thyristor V1; the thyristor output optocoupler U3 The output thyristor is connected in series with the resistor R2, and its series branch is connected to the first anode and the control pole of the bidirectional thyristor V1; the input light-emitting diode of the thyristor output optocoupler U3 is connected in series with the resistor R3, and one end of the series branch is connected to the DC The working power supply is VDD, and the other end is the trigger signal input end.

过零检测模块为半波整流分压电路，由二极管D2、电阻R4、电阻R5、稳压管DW1组成。电阻R4的两端分别连接至二极管D2阴极和稳压管DW1阴极；二极管D2阳极连接至单火线输出端AC1；稳压管DW1阳极连接至壁控开关单元的模拟地；电阻R5并联在稳压管DW1两端。过零信号从稳压管DW1阴极输出。The zero-crossing detection module is a half-wave rectification and voltage dividing circuit, which is composed of a diode D2, a resistor R4, a resistor R5, and a voltage regulator tube DW1. The two ends of resistor R4 are respectively connected to the cathode of diode D2 and the cathode of regulator DW1; the anode of diode D2 is connected to the single live wire output terminal AC1; the anode of regulator DW1 is connected to the analog ground of the wall control switch unit; resistor R5 is connected in parallel to the regulator Tube DW1 ends. The zero-crossing signal is output from the cathode of the regulator tube DW1.

实施例的亮度给定模块能够提供4个亮度给定信号给单片机控制模块，控制4个LED灯的亮度。实施例的亮度给定模块由4个BCD旋转编码器SW1－SW4组成，分别控制1－4#LED灯的亮度。BCD旋转编码器输出的BCD编码是0000－1001，其中，BCD编码0001－1001代表亮度1－9，BCD编码为0000时，代表亮度1。4个BCD旋转编码器的BCD编码输出端并联后连接至单片机控制模块的编码输入端；每个BCD旋转编码器的公共端连接至单片机控制模块的编码输入控制端。The brightness setting module of the embodiment can provide 4 brightness setting signals to the single-chip microcomputer control module to control the brightness of 4 LED lamps. The brightness setting module of the embodiment is composed of four BCD rotary encoders SW1-SW4, which respectively control the brightness of 1-4# LED lamps. The BCD code output by the BCD rotary encoder is 0000-1001, among which, the BCD code 0001-1001 represents the brightness 1-9, and when the BCD code is 0000, it represents the brightness 1. The BCD code output ends of the four BCD rotary encoders are connected in parallel To the coding input terminal of the single-chip microcomputer control module; the common terminal of each BCD rotary encoder is connected to the coding input control terminal of the single-chip microcomputer control module.

亮度给定模块也可以采用多个电位器对直流工作电源VDD进行分压，输出范围在0－3.3V的亮度给定电压。将电位器输出的0－3.3V的亮度给定电压平均分成10个区间，最低电压区间与BCD旋转编码器的编码0000对应，最高电压区间与BCD旋转编码器的编码1001对应。The brightness setting module can also use multiple potentiometers to divide the DC power supply VDD, and output the brightness setting voltage in the range of 0-3.3V. Divide the given brightness voltage of 0-3.3V output by the potentiometer into 10 sections on average, the lowest voltage section corresponds to the code 0000 of the BCD rotary encoder, and the highest voltage section corresponds to the code 1001 of the BCD rotary encoder.

单片机控制模块包括控制单片机U4、晶振XT1。控制单片机U4的型号是MSP430G2553。过零信号从控制单片机U4的P2.0输入，触发信号从控制单片机U4的P1.0输出，编码输入端是P2.4－P2.1，编码输入控制端包括4个控制端子P1.4－P1.1，分别控制4个BCD旋转编码器SW1－SW4的BCD编码输入。The single-chip microcomputer control module includes a control single-chip microcomputer U4 and a crystal oscillator XT1. The model of the control microcontroller U4 is MSP430G2553. The zero-crossing signal is input from P2.0 of the control microcontroller U4, the trigger signal is output from the P1.0 of the control microcontroller U4, the encoding input terminal is P2.4-P2.1, and the encoding input control terminal includes 4 control terminals P1.4- P1.1 controls the BCD code input of 4 BCD rotary encoders SW1-SW4 respectively.

如果亮度给定模块采用电位器，则4个电位器的输出电压连接至控制单片机U4的4个模拟电压输入端。If the brightness given module uses potentiometers, the output voltages of the four potentiometers are connected to the four analog voltage input terminals of the control microcontroller U4.

单片机控制模块每次控制编码输入控制端P1.4－P1.1中的1个有效，依次输入4个BCD旋转编码器SW1－SW4的BCD编码并从编码输入端P2.4－P2.1读取。图3所示实施例中，编码输入控制端P1.4－P1.1为低电平有效，例如，控制P1.1为低电平，P1.4－P1.2为高电平，则从编码输入端P2.4－P2.1输入的是BCD旋转编码器SW1的BCD编码，相应读取的是1#LED灯的亮度给定信号。The single-chip control module controls one of the code input control terminals P1.4-P1.1 to be valid each time, input the BCD codes of four BCD rotary encoders SW1-SW4 in turn and read them from the code input terminals P2.4-P2.1 Pick. In the embodiment shown in Figure 3, the encoding input control terminal P1.4-P1.1 is active at low level, for example, control P1.1 at low level, and P1.4-P1.2 at high level, then the The code input terminal P2.4-P2.1 inputs the BCD code of the BCD rotary encoder SW1, and reads the given brightness signal of the 1# LED lamp accordingly.

如果亮度给定模块采用电位器，则分别对各个模拟电压输入端输入的亮度给定电压进行A/D转换，得到4个LED灯的亮度给定信号。If the brightness setting module adopts a potentiometer, then A/D conversion is performed on the brightness setting voltage input by each analog voltage input terminal, and the brightness setting signals of the 4 LED lamps are obtained.

壁控开关单元通过控制单火线输出端AC1输出的电压波形来发送亮度控制信号，当壁控开关单元维持不发出亮度控制信号状态时，单片机控制模块持续输出低电平触发信号，双向晶闸管V1除过零点外持续导通，单火线输出端AC1输出的电压波形为连续完整的单相正弦波。The wall control switch unit sends the brightness control signal by controlling the voltage waveform output from the single live wire output terminal AC1. Continuous conduction outside the zero-crossing point, the voltage waveform output by the single live wire output terminal AC1 is a continuous and complete single-phase sine wave.

当壁控开关单元需要发送一次亮度控制信号时，一次亮度控制信号的波形由引导波形+地址波形+数据波形组成；引导波形由一个不导通的负半波，紧接一个完整导通的正半波组成；引导波形也可以由一个不导通的完整周波，紧接一个完整导通的正半波组成。When the wall control switch unit needs to send a brightness control signal, the waveform of a brightness control signal is composed of guide waveform + address waveform + data waveform; the guide waveform consists of a non-conductive negative half wave, followed by a complete conduction positive It consists of a half-wave; the pilot waveform can also consist of a complete cycle without conduction followed by a positive half-wave with complete conduction.

地址波形由一个周波的移相波形组成，负半波为移相角γ₁，正半波为移相角γ₀；移相角γ₁、移相角γ₀的值可以分别为移相角α₂、α₁、α₀中的一个，移相角α₂、α₁、α₀分别对应三进制数码值2、1、0。地址波形代表的是LED灯调节驱动单元的地址码，地址码由2位三进制地址数据组成，最多可以控制9个LED灯调节驱动单元。1－9#LED灯调节驱动单元按顺序对应的2位三进制地址码是00、01、02、10、11、12、20、21、22。The address waveform is composed of a phase-shift waveform of one cycle, the negative half-wave is the phase-shift angle γ ₁ , and the positive half-wave is the phase-shift angle γ ₀ ; the values of the phase-shift angle γ ₁ and the phase-shift angle γ ₀ can be the phase-shift angle respectively One of α ₂ , α ₁ , and α ₀ , and the phase shift angles α ₂ , α ₁ , and α ₀ correspond to ternary digital values 2, 1, and 0, respectively. The address waveform represents the address code of the LED lamp adjustment drive unit. The address code is composed of 2-digit ternary address data, and can control up to 9 LED lamp adjustment drive units. The 2-digit ternary address codes corresponding to the 1-9# LED lamp adjustment drive unit in sequence are 00, 01, 02, 10, 11, 12, 20, 21, 22.

数据波形由一个周波的移相波形组成，负半波为移相角β₁，正半波为移相角β₀；移相角β₁、移相角β₀的值可以分别为移相角α₂、α₁、α₀中的一个，移相角α₂、α₁、α₀分别对应三进制数码值2、1、0。每个LED灯有从低到高9档不同的亮度等级，即亮度1－9，由2位三进制亮度数据表示；与亮度1－9对应的2位三进制亮度数据依次是00、01、02、10、11、12、20、21、22；移相角β₁为2位三进制亮度数据的高位，移相角β₀为2位三进制亮度数据的低位。The data waveform is composed of a phase-shifted waveform of one cycle, the negative half-wave is the phase-shift angle β ₁ , and the positive half-wave is the phase-shift angle β ₀ ; the values of the phase-shift angle β ₁ and the phase-shift angle β ₀ can be respectively the phase-shift angle One of α ₂ , α ₁ , and α ₀ , and the phase shift angles α ₂ , α ₁ , and α ₀ correspond to ternary digital values 2, 1, and 0, respectively. Each LED light has 9 different brightness levels from low to high, that is, brightness 1-9, represented by 2-digit ternary brightness data; the 2-digit ternary brightness data corresponding to brightness 1-9 are 00, 01, 02, 10, 11, 12, 20, 21, 22; the phase shift angle β ₁ is the high bit of the 2-digit ternary brightness data, and the phase shift angle β ₀ is the low bit of the 2-bit ternary brightness data.

移相角α₂、α₁、α₀满足α₂<α₁<α₀的关系，典型值取α₂＝30°，α₁＝60°，α₀＝90°，如图4所示。移相角α₂、α₁、α₀也可以取值α₂＝0°，α₁＝45°，α₀＝90°，或者是取值α₂＝0°，α₁＝30°，α₀＝60°。The phase shift angles α ₂ , α ₁ , and α ₀ satisfy the relationship of α ₂ <α ₁ <α ₀ , and the typical values are α ₂ =30°, α ₁ =60°, and α ₀ =90°, as shown in Figure 4. Phase shift angles α ₂ , α ₁ , and α ₀ can also take values α ₂ =0°, α ₁ =45°, α ₀ =90°, or take values α ₂ =0°, α ₁ =30°, α ₀ = 60°.

如图5所示的是发送一次亮度控制信号的波形示例图1，其中，图5(a)为单火线输出端AC1输出的亮度控制信号电压波形，图5(b)为过零信号电压波形，图5(c)为亮度控制信号负半波整流整形后电压波形，图5(d)为亮度控制信号正半波整流整形后电压波形。As shown in Figure 5, the waveform example of sending a brightness control signal is shown in Figure 1, where Figure 5(a) is the voltage waveform of the brightness control signal output by the single live wire output terminal AC1, and Figure 5(b) is the voltage waveform of the zero-crossing signal , Figure 5(c) is the voltage waveform of the brightness control signal after negative half-wave rectification and shaping, and Figure 5(d) is the voltage waveform of the brightness control signal after positive half-wave rectification and shaping.

单火线输出端AC1输出连续完整的单相正弦波时，单火线输出端AC1与单火线输入端AC之间的电压差很小，过零检测模块不会输出过零信号，过零信号维持为低电平状态。When the single live wire output terminal AC1 outputs a continuous and complete single-phase sine wave, the voltage difference between the single live wire output terminal AC1 and the single live wire input terminal AC is very small, the zero-crossing detection module will not output a zero-crossing signal, and the zero-crossing signal remains at low state.

单片机控制模块需要发送一次亮度控制信号时，随机停止触发信号输出。当停止输出触发信号的时刻在交流电源正半波期间时，该正半波双向晶闸管V1已经导通，接下来的负半波双向晶闸管V1不导通，过零检测模块在整个负半波输出过零信号，过零信号为对应交流电源负半波的正脉冲，如图5中的脉冲1所示，脉冲1宽度接近10ms。单片机控制模块在脉冲1的下降沿处发出一个不超过10ms的触发脉冲，控制双向晶闸管V1接下来的正半波导通；同时将脉冲1的下降沿处作为过零计时起点，10ms后为移相角γ₁的过零点，20ms后为移相角γ₀的过零点，30ms后为移相角β₁的过零点，40ms后为移相角β₀的过零点。图5(a)中，波形2－5对应的分别是移相角γ₁、移相角γ₀、移相角β₁、移相角β₀；移相角γ₁的值为α₀，移相角γ₀的值为α₁，代表的地址码是01，对应的LED灯调节驱动单元是2#；移相角β₁的值为α₁，移相角β₀的值为α₂，亮度控制信号对应的2位三进制亮度数据是12；所发送的亮度控制信号的含义是：控制2#LED灯的亮度等级为亮度6。When the single-chip microcomputer control module needs to send a brightness control signal, the output of the trigger signal is randomly stopped. When the moment to stop outputting the trigger signal is during the positive half-wave of the AC power supply, the positive half-wave triac V1 has been turned on, and the next negative half-wave triac V1 is not turned on, and the zero-crossing detection module outputs during the entire negative half-wave Zero-crossing signal, the zero-crossing signal is a positive pulse corresponding to the negative half-wave of the AC power supply, as shown by pulse 1 in Figure 5, and the width of pulse 1 is close to 10ms. The single-chip microcomputer control module sends a trigger pulse not exceeding 10ms at the falling edge of pulse 1 to control the next positive half-wave conduction of the bidirectional thyristor V1; at the same time, the falling edge of pulse 1 is used as the starting point of zero-crossing timing, and phase shifting occurs after 10ms The zero-crossing point of angle γ ₁ is the zero-crossing point of phase shift angle γ ₀ after 20ms, the zero-crossing point of phase shift angle β ₁ after 30ms, and the zero-crossing point of phase shift angle β ₀ after 40ms. In Figure 5(a), waveforms 2-5 correspond to phase shift angle γ ₁ , phase shift angle γ ₀ , phase shift angle β ₁ , and phase shift angle β ₀ ; the value of phase shift angle γ ₁ is α ₀ , The value of the phase shift angle γ ₀ is α ₁ , the representative address code is 01, and the corresponding LED lamp adjustment drive unit is 2#; the value of the phase shift angle β ₁ is α ₁ , and the value of the phase shift angle β ₀ is α ₂ , the 2-digit ternary brightness data corresponding to the brightness control signal is 12;

当单片机控制模块需要发送一次亮度控制信号，随机停止触发信号输出的时刻在交流电源负半波期间时，该负半波双向晶闸管V1已经导通，接下来的正半波双向晶闸管V1不导通，但由于过零检测模块采用的是半波整流，正半波双向晶闸管V1不导通，也不会使过零检测模块输出过零信号；直到再接下来的负半波双向晶闸管V1不导通，过零检测模块在整个负半波输出过零信号，过零信号为正脉冲。发送一次亮度控制信号的波形示例图2如图6所示，图6(a)为单火线输出端AC1输出的亮度控制信号电压波形，图6(b)为过零信号电压波形，图6(c)为亮度控制信号负半波整流整形后电压波形，图6(d)为亮度控制信号正半波整流整形后电压波形。图6中的脉冲11为过零信号正脉冲，其宽度接近10ms。单片机控制模块在脉冲11的下降沿处发出一个不超过10ms的触发脉冲，控制双向晶闸管V1接下来的正半波导通；同时将脉冲11的下降沿处作为过零计时起点，10ms后为移相角γ₁的过零点，20ms后为移相角γ₀的过零点，30ms后为移相角β₁的过零点，40ms后为移相角β₀的过零点。图6(a)中，波形12－15对应的分别是移相角γ₁、移相角γ₀、移相角β₁、移相角β₀；移相角γ₁的值为α₀，移相角γ₀的值为α₁，代表的地址码是01，对应的LED灯调节驱动单元是2#；移相角β₁的值为α₀，移相角β₀的值为α₂，亮度控制信号对应的2位三进制亮度数据是02；所发送的亮度控制信号的含义是：控制2#LED灯的亮度等级为亮度3。When the single-chip control module needs to send a brightness control signal, the moment when the output of the trigger signal is randomly stopped is during the negative half-wave of the AC power supply, the negative half-wave triac V1 has been turned on, and the next positive half-wave triac V1 is not turned on , but because the zero-crossing detection module uses half-wave rectification, the positive half-wave triac V1 will not conduct, and the zero-crossing detection module will not output a zero-crossing signal; until the next negative half-wave triac V1 does not conduct Pass, the zero-crossing detection module outputs a zero-crossing signal in the entire negative half-wave, and the zero-crossing signal is a positive pulse. Figure 2 shows a waveform example of sending a brightness control signal once, as shown in Figure 6, Figure 6(a) is the voltage waveform of the brightness control signal output by the single live wire output terminal AC1, Figure 6(b) is the voltage waveform of the zero-crossing signal, Figure 6( c) is the voltage waveform of the brightness control signal after negative half-wave rectification and shaping, and Fig. 6(d) is the voltage waveform of the brightness control signal after positive half-wave rectification and shaping. The pulse 11 in FIG. 6 is a positive pulse of the zero-crossing signal, and its width is close to 10 ms. The single-chip microcomputer control module sends a trigger pulse not exceeding 10ms at the falling edge of pulse 11 to control the next positive half-wave conduction of the bidirectional thyristor V1; at the same time, the falling edge of pulse 11 is used as the zero-crossing timing starting point, and phase shifting occurs after 10ms The zero-crossing point of angle γ ₁ is the zero-crossing point of phase shift angle γ ₀ after 20ms, the zero-crossing point of phase shift angle β ₁ after 30ms, and the zero-crossing point of phase shift angle β ₀ after 40ms. In Figure 6(a), waveforms 12-15 correspond to phase shift angle γ ₁ , phase shift angle γ ₀ , phase shift angle β ₁ , and phase shift angle β ₀ ; the value of phase shift angle γ ₁ is α ₀ , The value of the phase shift angle γ ₀ is α ₁ , the representative address code is 01, and the corresponding LED lamp adjustment drive unit is 2#; the value of the phase shift angle β ₁ is α ₀ , and the value of the phase shift angle β ₀ is α ₂ , the 2-digit ternary brightness data corresponding to the brightness control signal is 02;

所有BCD旋转编码器输出的BCD编码为0000时，单片机控制模块停止输出触发信号，双向晶闸管V1关断，关闭所有LED灯，单火线输出端AC1仅流过微电流。When the BCD code output by all BCD rotary encoders is 0000, the microcontroller control module stops outputting the trigger signal, the bidirectional thyristor V1 is turned off, and all LED lights are turned off, and only a small current flows through the single live wire output terminal AC1.

图7为亮度控制信号发送控制方法，通过单片机控制模块中的程序实现，其方法是：Fig. 7 is the brightness control signal transmission control method, realized by the program in the single-chip microcomputer control module, and its method is:

步骤A，判断是否关闭LED灯，是则关闭LED灯，进入关闭LED灯状态，转到步骤D；否则为非关闭LED灯状态，转到步骤B；Step A, judge whether to turn off the LED light, if yes, turn off the LED light, enter the state of turning off the LED light, and go to step D; otherwise, it is in the state of not turning off the LED light, go to step B;

步骤B，确定亮度控制信号的地址码与亮度等级；Step B, determining the address code and brightness level of the brightness control signal;

步骤C，发出一次亮度控制信号；Step C, sending out a brightness control signal;

步骤D，判断亮度给定信号是否发生改变，亮度给定信号发生改变，返回步骤A；亮度给定信号没有发生改变，返回步骤C。Step D, judging whether the given brightness signal changes, if the given brightness signal changes, return to step A; if the given brightness signal does not change, return to step C.

当壁控开关单元不发出亮度控制信号时，单火线输出端AC1输出的电压波形为连续完整的单相正弦波。When the wall control switch unit does not send a brightness control signal, the voltage waveform output by the single live wire output terminal AC1 is a continuous and complete single-phase sine wave.

确定亮度控制信号时，首先判断是哪个地址码对应的LED灯的亮度给定信号发生改变，确定地址码，然后确定其亮度等级。如果有多个地址码对应的LED灯的亮度给定信号发生改变，则先处理其中一个，发出一次亮度控制信号；有未处理完的在步骤D会再一次返回步骤A，依次处理并发出亮度控制信号。When determining the brightness control signal, first determine which address code corresponds to the given signal of the brightness of the LED lamp that has changed, determine the address code, and then determine its brightness level. If the given brightness signal of the LED lights corresponding to multiple address codes changes, one of them will be processed first, and the brightness control signal will be sent once; if there are unprocessed ones, it will return to step A again in step D, and the brightness will be processed in turn. control signal.

判断亮度给定信号是否发生改变时，只要有1个以上，包含1个LED灯的亮度给定信号发生改变，则认为亮度给定信号发生改变。When judging whether the given brightness signal has changed, as long as more than one given brightness signal including one LED lamp changes, it is considered that the given brightness signal has changed.

所有LED灯调节驱动单元的结构都相同，如图8所示，由单片机调节模块、LED驱动模块组成，单片机调节模块和LED驱动模块的交流输入端均连接至火线输入端AC1、零线输入端N。The structure of all LED lamp adjustment drive units is the same, as shown in Figure 8, it is composed of a single-chip microcomputer adjustment module and an LED driver module. N.

LED驱动模块用于驱动LED灯点亮，所有设有PWM亮度调节信号输入端的LED驱动模块都适用于本发明。The LED driving module is used to drive the LED lamp to light up, and all LED driving modules provided with PWM brightness adjustment signal input terminals are applicable to the present invention.

单片机调节模块设有PWM亮度调节信号输出端并连接至LED驱动模块的PWM亮度调节信号输入端。The single-chip microcomputer adjustment module is provided with a PWM brightness adjustment signal output end and is connected to the PWM brightness adjustment signal input end of the LED drive module.

单片机调节模块的实施例电路如图9所示。An embodiment circuit of the single-chip microcomputer adjustment module is shown in FIG. 9 .

图9所示实施例中，单片机调节模块由调节单片机U5、二极管D3、二极管D4、二极管D5、二极管D6、二极管D7、二极管D8、稳压管DW2、稳压管DW3、稳压管DW4、电阻R6、电阻R7、电阻R8、电容C5、晶振XT2、BCD拨码开关SW组成。In the embodiment shown in Fig. 9, the single-chip microcomputer adjustment module is composed of regulating single-chip microcomputer U5, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8, voltage regulator DW2, voltage regulator DW3, voltage regulator DW4, resistor Composed of R6, resistor R7, resistor R8, capacitor C5, crystal oscillator XT2, and BCD dial switch SW.

二极管D3、二极管D4阴极、二极管D5、二极管D6、电容C5、电阻R6、稳压管DW2组成整流稳压电路，向调节单片机U5提供电源。The diode D3, the cathode of the diode D4, the diode D5, the diode D6, the capacitor C5, the resistor R6, and the voltage regulator DW2 form a rectification and voltage stabilization circuit to provide power to the regulating single-chip microcomputer U5.

二极管D8、电阻R8、稳压管DW4组成负半波整流整形电路，稳压管DW4上得到的负半波波形如图5(c)、图6(c)所示；二极管D7、电阻R7、稳压管DW3组成正半波整流整形电路，稳压管DW3上得到的正半波波形如图5(d)、图6(d)所示。正半波整流整形电路和负半波整流整形电路分别对火线输入端AC1输入的交流电压进行正半波整流整形和负半波整流整形。正半波整流整形电路的输出、负半波整流整形电路的输出分别连接至调节单片机U5的捕捉比较输入端P2.0、P2.1。Diode D8, resistor R8, and voltage regulator DW4 form a negative half-wave rectification and shaping circuit. The negative half-wave waveform obtained on the voltage regulator DW4 is shown in Figure 5(c) and Figure 6(c); diode D7, resistor R7, The regulator tube DW3 forms a positive half-wave rectification and shaping circuit, and the positive half-wave waveform obtained on the regulator tube DW3 is shown in Figure 5(d) and Figure 6(d). The positive half-wave rectification and shaping circuit and the negative half-wave rectification and shaping circuit respectively perform positive half-wave rectification and shaping and negative half-wave rectification and shaping on the AC voltage input by the live wire input terminal AC1. The output of the positive half-wave rectification and shaping circuit and the output of the negative half-wave rectification and shaping circuit are respectively connected to the capture comparison input terminals P2.0 and P2.1 of the regulating single-chip microcomputer U5.

调节单片机U5型号为MSP430G2553，其PWM输出端P1.2为所述PWM亮度调节信号输出端。调节单片机U5的电源负输入端VSS连接至公共参考地。The model of the regulating single-chip microcomputer U5 is MSP430G2553, and its PWM output terminal P1.2 is the output terminal of the PWM brightness adjustment signal. Adjusting the power supply negative input terminal VSS of the microcontroller U5 is connected to the common reference ground.

BCD拨码开关SW连接至单片机调节模块的地址码设定输入端，图9所示实施例中，地址码设定输入端为调节单片机U5的P2.2－P2.5。BCD拨码开关SW用于设定LED灯调节驱动单元的地址码；BCD拨码开关SW输出的BCD编码范围为0001－1001时，按顺序对应的LED灯调节驱动单元的编号是1－9#，相应的2位三进制地址码是00、01、02、10、11、12、20、21、22；BCD拨码开关SW输出的BCD编码为0000时，该LED灯调节驱动单元将关闭LED灯，停止接收亮度控制信号。图9所示实施例中，BCD拨码开关SW输出的BCD编码为0001，表示将本LED灯调节驱动单元设定为1#LED灯调节驱动单元，相应设定的2位三进制地址码是00。The BCD dial switch SW is connected to the address code setting input terminal of the single-chip microcomputer adjustment module. In the embodiment shown in FIG. 9 , the address code setting input terminal is P2.2-P2.5 of the single-chip microcomputer U5. The BCD dial switch SW is used to set the address code of the LED lamp adjustment drive unit; when the BCD code range output by the BCD dial switch SW is 0001-1001, the serial number of the corresponding LED lamp adjustment drive unit is 1-9# , the corresponding 2-digit ternary address codes are 00, 01, 02, 10, 11, 12, 20, 21, 22; when the BCD code output by the BCD dial switch SW is 0000, the LED light adjustment drive unit will be turned off LED light, stop receiving brightness control signal. In the embodiment shown in Figure 9, the BCD code output by the BCD dial switch SW is 0001, which means that the LED lamp adjustment drive unit is set as the 1# LED lamp adjustment drive unit, and the corresponding 2-digit ternary address code is set It is 00.

LED驱动模块用于驱动LED灯点亮，设有PWM亮度调节信号输入端的LED驱动模块都可以适用于本发明，图10所示仅为其中的一个实施例电路。The LED driving module is used to drive the LED lamp to light up. The LED driving module provided with PWM brightness adjustment signal input terminal can be applicable to the present invention, and the circuit shown in FIG. 10 is only one embodiment thereof.

图10中，LED驱动模块由LED驱动器U6、二极管D9、二极管D10、二极管D11、二极管D12、电容C6、电容C7、电容C8、电感L3、快恢复二极管D13、开关管VD、电阻R9、电阻R10组成。LED驱动器U6的型号为HV9910。In Figure 10, the LED driver module consists of LED driver U6, diode D9, diode D10, diode D11, diode D12, capacitor C6, capacitor C7, capacitor C8, inductor L3, fast recovery diode D13, switch tube VD, resistor R9, resistor R10 composition. The model number of LED driver U6 is HV9910.

图10中，二极管D9、二极管D10、二极管D11、二极管D12组成单相桥式整流电路。单相桥式整流电路的2个交流输入端分别连接至火线输入端AC1、零线输入端N，直流输出负端连接至公共参考地，直流输出正端连接至电容C6正极、电容C7的一端、LED驱动器U6的电源输入端VIN、电感L3的一端、快恢复二极管D13阴极。LED驱动器U6的地输入端GND连接至公共参考地。电容C6负极、电容C7的另一端连接至公共参考地。快恢复二极管D13阳极与开关管VD的漏极联结后作为大功率LED灯的负极性连接端LED－，电感L3的另外一端作为大功率LED灯的正极性连接端LED+。开关管VD的源极与电阻R9一端联结后连接至所述LED驱动器U6的LED电流检测端CS；电阻R9的另一端连接至公共参考地。开关管VD的栅极连接至LED驱动器U6的驱动端GATE；电阻R10的一端连接至LED驱动器U6的振荡频率控制端RT、另一端连接至公共参考地。电容C8正极连接至LED驱动器U6的控制电压输出端VDD和线性电流控制端LD、负极连接至公共参考地。LED驱动器U6的使能控制端PWM_D为所述PWM亮度调节信号输入端。In Fig. 10, diode D9, diode D10, diode D11 and diode D12 form a single-phase bridge rectifier circuit. The two AC input terminals of the single-phase bridge rectifier circuit are respectively connected to the live line input terminal AC1 and the neutral line input terminal N, the negative terminal of the DC output is connected to the common reference ground, and the positive terminal of the DC output is connected to the positive pole of the capacitor C6 and one end of the capacitor C7 , the power input terminal VIN of the LED driver U6, one end of the inductor L3, and the cathode of the fast recovery diode D13. The ground input terminal GND of the LED driver U6 is connected to the common reference ground. The negative electrode of the capacitor C6 and the other end of the capacitor C7 are connected to the common reference ground. The anode of the fast recovery diode D13 is connected to the drain of the switching tube VD as the negative connection terminal LED- of the high-power LED lamp, and the other end of the inductor L3 is used as the positive connection terminal LED+ of the high-power LED lamp. The source of the switch tube VD is connected to one end of the resistor R9 and then connected to the LED current detection terminal CS of the LED driver U6; the other end of the resistor R9 is connected to the common reference ground. The gate of the switch tube VD is connected to the driving terminal GATE of the LED driver U6; one end of the resistor R10 is connected to the oscillation frequency control terminal RT of the LED driver U6, and the other end is connected to the common reference ground. The positive pole of the capacitor C8 is connected to the control voltage output terminal VDD and the linear current control terminal LD of the LED driver U6, and the negative pole is connected to the common reference ground. The enabling control terminal PWM_D of the LED driver U6 is the input terminal of the PWM brightness adjustment signal.

LED灯调节驱动单元由单片机调节模块接收亮度控制信号并控制亮度，如图11所示，其方法是，The LED lamp adjustment drive unit receives the brightness control signal by the single-chip microcomputer adjustment module and controls the brightness, as shown in Figure 11, the method is:

步骤一，初始化，控制LED灯为初始亮度；Step 1, initialization, control the LED light to the initial brightness;

步骤二，判断单火线上是否有亮度控制信号；没有亮度控制信号，返回步骤二；有亮度控制信号，转到步骤三；Step 2. Determine whether there is a brightness control signal on the single live line; if there is no brightness control signal, return to step 2; if there is a brightness control signal, go to step 3;

步骤三，接收亮度控制信号，得到2位三进制地址码和2位三进制亮度数据；Step 3, receiving the brightness control signal to obtain a 2-digit ternary address code and a 2-digit ternary brightness data;

步骤四，判断是否为目标LED灯；不是目标LED灯，返回步骤二；是目标LED灯，转到步骤五；Step 4, judge whether it is the target LED light; if it is not the target LED light, return to step 2; if it is the target LED light, go to step 5;

步骤五，改变LED灯亮度，返回步骤二。Step five, change the brightness of the LED light, return to step two.

初始亮度可以设置为9档不同亮度中的任何一个，例如，设置为亮度1。The initial brightness can be set to any one of 9 levels of different brightness, for example, set to brightness 1.

判断单火线上是否有亮度控制信号，方法为判断单火线上是否有亮度控制信号的引导波形。正常情况下，火线输入端AC1输入的电压波形为连续完整的单相正弦波，负半波整流整形电路输出的波形为周期20ms、脉冲宽度近10ms的矩形波。壁控开关单元发送一次亮度控制信号时，其引导波形造成一个负半波的缺失，如图5(c)与图5(b)脉冲1对应位置的负半波脉冲缺失，如图6(c)与图6(b)脉冲11对应位置的负半波脉冲缺失。单片机调节模块判断出负半波整流整形电路输出的波形有负半波脉冲缺失，且接下来的正半波整流整形电路输出的正半波波形完整，对应的正半波脉冲为图5中的脉冲6，或者图6中的脉冲16，即可判断出单火线上有亮度控制信号的引导波形。To judge whether there is a brightness control signal on the single live line, the method is to judge whether there is a guide waveform of the brightness control signal on the single live line. Under normal circumstances, the voltage waveform input by the live wire input terminal AC1 is a continuous and complete single-phase sine wave, and the waveform output by the negative half-wave rectification and shaping circuit is a rectangular wave with a period of 20ms and a pulse width of nearly 10ms. When the wall control switch unit sends a brightness control signal, its guiding waveform causes the absence of a negative half-wave, as shown in Figure 5(c) and Figure 5(b) where the negative half-wave pulse corresponding to pulse 1 is missing, as shown in Figure 6(c ) The negative half-wave pulse at the position corresponding to pulse 11 in Fig. 6(b) is missing. The single-chip microcomputer adjustment module judges that the waveform output by the negative half-wave rectification and shaping circuit has a negative half-wave pulse missing, and the positive half-wave waveform output by the subsequent positive half-wave rectification and shaping circuit is complete, and the corresponding positive half-wave pulse is as shown in Figure 5 Pulse 6, or pulse 16 in FIG. 6 , can determine that there is a guide waveform of the brightness control signal on the single live line.

接收亮度控制信号，得到2位三进制地址码和2位三进制亮度数据，方法为依次测量地址波形、数据波形负半波的导通角和正半波的导通角，计算得到负半波移相角和正半波移相角后，再转换成2位三进制地址码和2位三进制亮度数据。图5中脉冲7的宽度、图6中脉冲17的宽度为地址波形负半波的导通角，图5中脉冲8的宽度、图6中脉冲18的宽度为地址波形正半波的导通角；图5中脉冲9的宽度、图6中脉冲19的宽度为数据波形负半波的导通角，图5中脉冲10的宽度、图6中脉冲20的宽度为数据波形正半波的导通角。移相角与导通角之和为180°，或者为时间10ms。负半波移相角γ₁和β₁、正半波移相角γ₀和β₀分别选择与移相角α₂、α₁、α₀中最接近的一个，来分别确定对应三进制数码值2、1、0。Receive the brightness control signal to obtain 2-digit ternary address code and 2-digit ternary brightness data. The method is to measure the conduction angle of the address waveform, the negative half-wave of the data waveform and the conduction angle of the positive half-wave in sequence, and calculate the negative half-wave After wave phase shifting and positive half-wave phase shifting, it is converted into 2-digit ternary address code and 2-digit ternary brightness data. The width of pulse 7 in Figure 5 and the width of pulse 17 in Figure 6 are the conduction angles of the negative half-wave of the address waveform, the width of pulse 8 in Figure 5 and the width of pulse 18 in Figure 6 are the conduction angles of the positive half-wave of the address waveform Angle; the width of pulse 9 in Fig. 5, the width of pulse 19 in Fig. 6 is the conduction angle of the negative half wave of data waveform, the width of pulse 10 in Fig. 5, the width of pulse 20 in Fig. 6 is the positive half wave of data waveform conduction angle. The sum of the phase shift angle and the conduction angle is 180°, or a time of 10ms. Negative half-wave phase-shift angles γ ₁ and β ₁ , positive half-wave phase-shift angles γ ₀ and β ₀ respectively select the one closest to phase-shift angles α ₂ , α ₁ , and α ₀ to determine the corresponding ternary Digital values 2, 1, 0.

判断是否为目标LED灯，方法是判断接收到的2位三进制地址码是否与本LED灯调节驱动单元设定的2位三进制地址码相符合；相符合，是目标LED灯；不相符合，不是目标LED灯。To judge whether it is the target LED light, the method is to judge whether the received 2-digit ternary address code is consistent with the 2-digit ternary address code set by the LED light adjustment drive unit; if it matches, it is the target LED light; In line with that, not the target LED lights.

改变LED灯亮度，通过改变连接至LED驱动器U6使能控制端PWM_D的PWM亮度调节信号的占空比实现。Changing the brightness of the LED light is achieved by changing the duty cycle of the PWM brightness adjustment signal connected to the enabling control terminal PWM_D of the LED driver U6.

在图1中，壁控开关单元是单火线AC进，单火线AC1出；所有LED灯调节驱动单元火线AC1进，零线N出。从抗干扰的角度考虑，将图1中的火线AC与零线N位置对调，本发明所述方法仍然有效，且抗干扰能力更强。In Figure 1, the wall control switch unit has a single live wire AC input and a single live wire AC1 output; all LED lamp adjustment drive units have a live line AC1 input and a neutral line N output. From the perspective of anti-interference, the method of the present invention is still effective and has a stronger anti-interference ability if the positions of the live line AC and the neutral line N in FIG. 1 are swapped.

本发明所述方法具有如下特点：The method of the present invention has the following characteristics:

①采用单火线方式控制LED灯亮度，无需遥控器，无需控制线，也不用重新敷设电源线；① Control the brightness of the LED light with a single live wire, no remote control, no control wires, and no need to re-lay the power wires;

②LED灯亮度调节共分9档，采用旋钮装置调节，符合操作习惯；②The brightness adjustment of the LED light is divided into 9 levels, which are adjusted by the knob device, which is in line with the operating habits;

③单火线上的亮度控制信号仅仅是在改变亮度时进行短时发送；③The brightness control signal on the single fire line is only sent for a short time when changing the brightness;

④采用单火线可以分别单独控制最多9个LED灯的亮度。④The brightness of up to 9 LED lights can be individually controlled by using a single live wire.