WO2013040736A1

WO2013040736A1 - Dc high voltage power supply led street lamp system and realization method thereof

Info

Publication number: WO2013040736A1
Application number: PCT/CN2011/002008
Authority: WO
Inventors: 张雅萍; 李旭亮
Original assignee: 东莞勤上光电股份有限公司
Priority date: 2011-09-19
Filing date: 2011-11-30
Publication date: 2013-03-28

Abstract

The present invention relates to a DC high voltage power supply LED street lamp system, comprising: a central DC power cabinet for outputting different high voltage signals; and an LED street lamp connected to the central DC power cabinet via a wire to receive the different high voltage signals and show different display states according to the different high voltage signals. The present invention features an integrated power supply and control, thus greatly saving setup and maintenance costs for an LED light system, and further improving the overall life and reliability.

Description

一种直流高压供电 LED路灯***及其实现方法技术领域本发明涉及 LED 照明供电***，具体涉及一种直流高压供电 LED路灯***及其实现方法。背景技术与传统路灯相比， LED路灯具有使用寿命长、节能等优点。以往的 LED路灯都采用交流（AC )供电，每盏 LED路灯都需要至少一个用于将 AC转换为直流（DC ) 的开关电源，才能让 LED路灯正常工作。但由于这种电源本身寿命短，经常性损坏，这就给 LED路灯带来了维护上的难题，间接影响了 LED路灯的使用寿命。 TECHNICAL FIELD The present invention relates to an LED lighting power supply system, and in particular to a DC high voltage power supply LED street light system and an implementation method thereof. BACKGROUND OF THE INVENTION Compared with conventional street lamps, LED street lamps have the advantages of long service life and energy saving. Previous LED street lights are powered by alternating current (AC). Each LED street light requires at least one switching power supply for converting AC to direct current (DC) in order for the LED street light to function properly. However, due to the short life and frequent damage of the power supply, this brings maintenance problems to the LED street lamp, which indirectly affects the service life of the LED street lamp.

直流高压供电，也就是采用集中供电的形式，直接给 LED路灯输送 250V高压直流电，而 LED路灯上就无需配备单独的开关电源。目前为止，还没有出现专门针对这种直流高压供电 LED路灯的控制方式。在需要对这种 LED路灯进行控制时，只能采用以往针对交流供电 LED路灯的办法，在路灯供电***之外增加控制***来实现，这就需要在每盏 LED路灯上安装一个信号接收装置，以及一个集中控制这些信号接收和执行装置的设备。这类方式造成了人力和材料成本的增加，同时在以后的维护中，也需要为这些装置投入维护力量。另夕卜，中国发明" LED路灯控制器"，申请号 200910105774.X, 公开一种采用通用分组无线服务（GPRS )和紫蜂（ZigBee )无线通讯传输数据的控制方式的 LED路灯控制器，实现 LED路灯远程控制，它也是独立控制***和网络的一种。发明内容本发明需要解决的技术问题是，提供一种 LED路灯和控制装置，无须专门线路和信号接收装置接收直流高压电力线上承载的控制信号。 DC high-voltage power supply, that is, in the form of centralized power supply, directly delivers 250V high-voltage direct current to the LED street light, and the LED street light does not need to be equipped with a separate switching power supply. So far, there has not been a control method specifically for this DC high voltage power supply LED street light. When it is necessary to control such an LED street lamp, only a method for the AC-powered LED street lamp can be used, and a control system is added outside the street lamp power supply system, which requires installing a signal receiving device on each LED street lamp. And a device that centrally controls these signal receiving and executing devices. This type of approach creates an increase in labor and material costs, and in the future maintenance, it is also necessary to put maintenance into these devices. In addition, China invented "LED Street Light Controller", application number 200910105774.X, which discloses an LED street light controller that uses General Packet Radio Service (GPRS) and ZigBee wireless communication to transmit data. LED street light remote control, it is also a kind of independent control system and network. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide an LED street lamp and a control device that does not require a dedicated line and a signal receiving device to receive a control signal carried on a DC high voltage power line.

本发明提供一种直流高压供电 LED路灯***，其包括：中央直流电源机拒，用于输出不同的高压信号；以及 The invention provides a DC high voltage power supply LED street lamp system, which comprises: a central DC power supply rejection for outputting different high voltage signals;

LED路灯，与所述中央直流电源机拒通过电线相互连接，用于接收不同的高压信号，并根据不同的高压信号进行不同显示状态的显示。 The LED street lamp is connected to the central DC power supply through a wire for receiving different high voltage signals, and displaying different display states according to different high voltage signals.

进一步地，所述不同的高压信号包括第一高压信号和第二高压信号，中央直流电源机拒输出的第一高压信号的持续时长与中央直流电源机拒输出的第二高压信号的持续时长不同。 Further, the different high voltage signals include a first high voltage signal and a second high voltage signal, and the duration of the first high voltage signal rejected by the central DC power source is different from the duration of the second high voltage signal rejected by the central DC power source. .

进一步地，所述不同的高压信号包括第一高压信号、第一高压到第二高压线性变化信号、第二高压信号、以及第二高压到第一高压线性变化信号，所述第一高压信号、第一高压到第二高压线性变化信号、第二高压信号、以及第二高压到第一高压线性变化信号的持续时长不完全相同。进一步地，所述中央直流电源机拒包括依次电连接的主控芯片、数模转换模块和电源模块。 Further, the different high voltage signal includes a first high voltage signal, a first high voltage to a second high voltage linear change signal, a second high voltage signal, and a second high voltage to a first high voltage linear change signal, the first high voltage signal, The durations of the first high voltage to the second high voltage linear change signal, the second high voltage signal, and the second high voltage to the first high voltage linear change signal are not completely the same. Further, the central DC power supply machine includes a main control chip, a digital-to-analog conversion module, and a power supply module that are electrically connected in sequence.

进一步地，所述 LED路灯包括依次电连接的电压转换模块、模数转换模块、单片机、恒流电路和 LED光源，其中，电压转换电路将电线中传输来的高压模拟信号转换成低压模拟信号，再将低压模拟信号送给模数转换模块，模数转换模块通过模数采样提取出模拟信号，并将此模拟信号转换成数字信号，发送给单片机，单片机对此数字信号进行分析后，驱动恒流电路控制 LED光源的显示状态。 Further, the LED street lamp comprises a voltage conversion module, an analog-to-digital conversion module, a single-chip microcomputer, a constant current circuit and an LED light source which are electrically connected in sequence, wherein the voltage conversion circuit converts the high-voltage analog signal transmitted from the electric wire into a low-voltage analog signal, The low-voltage analog signal is sent to the analog-to-digital conversion module, and the analog-to-digital conversion module extracts the analog signal through analog-to-digital sampling, and converts the analog signal into a digital signal, which is sent to the single-chip microcomputer, and the single-chip microcomputer analyzes the digital signal, and then drives the constant signal. The flow circuit controls the display state of the LED light source.

本发明提供一种直流高压供电 LED路灯***的实现方法，其包括： The invention provides a method for realizing a DC high voltage power supply LED street lamp system, which comprises:

通过中央直流电源机拒输出不同的高压信号； Rejecting different high voltage signals through the central DC power supply;

LED路灯接收中央直流电源机拒输出的不同的高压信号，并根据不同的高压信号进行不同显示状态的显示。 The LED street light receives different high voltage signals that the central DC power supply refuses to output, and displays different display states according to different high voltage signals.

进一步地，所述不同的高压信号包括第一高压信号、第一高压到第二高压线性变化信号、第二高压信号、以及第二高压到第一高压线性变化信号，所述第一高压信号、第一高压到第二高压线性变化信号、第二高压信号、以及第二高压到第一高压线性变化信号的持续时长不完全相同。进一步地，所述 LED路灯包括依次电连接的电压转换模块、模数转换模块、单片机、恒流电路和 LED光源，其中，电压转换电路将电线中传输来的高压模拟信号转换成低压模拟信号，再将低压模拟信号送给模数转换模块，模数转换模块通过模数采样提取出模拟信号，并将此模拟信号转换成数字信号，发送给单片机，单片机对此数字信号进行分析后，驱动恒流电路控制 LED光源的显示状态。 Further, the different high voltage signal includes a first high voltage signal, a first high voltage to a second high voltage linear change signal, a second high voltage signal, and a second high voltage to a first high voltage linear change signal, the first high voltage signal, The durations of the first high voltage to the second high voltage linear change signal, the second high voltage signal, and the second high voltage to the first high voltage linear change signal are not completely the same. Further, the LED street lamp comprises a voltage conversion module, an analog-to-digital conversion module, a single-chip microcomputer, a constant current circuit and an LED light source which are electrically connected in sequence, wherein the voltage conversion circuit converts the high-voltage analog signal transmitted from the electric wire into a low-voltage analog signal, The low-voltage analog signal is sent to the analog-to-digital conversion module, and the analog-to-digital conversion module extracts the analog signal through analog-to-digital sampling, and converts the analog signal into a digital signal, which is sent to the single-chip microcomputer, and the single-chip microcomputer analyzes the digital signal, and then drives the constant signal. The flow circuit controls the display state of the LED light source.

进一步地，所述中央直流电源机拒与 LED路灯之间通过总线或星型网的电线的连接结构进行相互连接。 Further, the central DC power source is mutually connected to the LED street lamp through a connection structure of wires of the bus or the star network.

与现有技术相比较，本发明通过施加不同的高压信号对 LED路灯进行供电和显示状态控制，具有供电和控制合一的特点，大大节省 LED照明***新建和维护成本，进一步还提高了整体寿命和可靠性。附图说明下面结合附图和具体实施例进一步对本发明进行详细说明。图 1是本发明具体实施例应用***架构示意图； Compared with the prior art, the present invention controls the power supply and display state of the LED street lamp by applying different high-voltage signals, and has the characteristics of power supply and control integration, greatly saving the new construction and maintenance cost of the LED lighting system, and further improving the overall life. And reliability. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be further described in detail below with reference to the drawings and specific embodiments. 1 is a schematic diagram of an application system architecture of a specific embodiment of the present invention;

图 2是图 1所示 LED路灯***对应的控制流程示意图；图 3是图 1中 DAC模块输出电信号时序示意图； 2 is a schematic diagram of a control flow corresponding to the LED street lamp system shown in FIG. 1; FIG. 3 is a timing diagram of an output electrical signal of the DAC module in FIG.

图 4是图 1中电源模块输出电信号时序示意图； 4 is a timing diagram of the output electrical signal of the power module of FIG. 1;

图 5是本发明具体实施例一内部电结构示意图； FIG. 5 is a schematic diagram of an internal electrical structure of a specific embodiment of the present invention; FIG.

图 6是图 5中单片机获取电信号时序示意图； 6 is a schematic diagram of timings of acquiring an electrical signal by the single chip microcomputer of FIG. 5;

图 7是图 5中单片机依状态机模型处理电信号的示意图；图 8是本发明具体实施例二内部电结构示意图。具体实施方式如图 1所示，应用本发明具体实施例的 LED路灯的应用***包括中央直流电源机拒、多个直流供电 LED路灯，以及连接中央直流电源机拒与直流供电 LED路灯的电线，其中： 7 is a schematic diagram of the single chip of FIG. 5 processing an electrical signal according to a state machine model; FIG. 8 is a schematic diagram of an internal electrical structure of a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1 , an application system of an LED street lamp to which the specific embodiment of the present invention is applied includes a central DC power supply rejection, a plurality of DC-powered LED street lamps, and a wire connecting the central DC power supply to the DC-powered LED street lamp. among them:

1、中央直流电源机拒包括：控制器、至少一个电源模块； 1. The central DC power supply rejects: the controller and at least one power module;

2、直流供电 LED路灯包括： LED光源、电压转换电路、模数转换（ADC )模块、单片机、恒流电路； 2. DC power supply LED street light includes: LED light source, voltage conversion circuit, analog-to-digital conversion (ADC) module, single-chip microcomputer, constant current circuit;

3、电线：直接采用现有交流电线即可，方便路灯工程改造。所述中央直流电源机拒与 LED路灯之间通过总线或星型网的电线的连接结构进行相互连接。进一步地，中央直流电源机拒的控制器包括：指令接收装置、主控芯片（MCU )、数模转换（DAC )模块。其工作原理是： 3. Wire: Directly use the existing AC wire to facilitate the transformation of street lamps. The central DC power source is mutually connected to the LED street lamp through a connection structure of a bus or a star network wire. Further, the controller of the central DC power supply rejection includes: an instruction receiving device, a main control chip (MCU), and a digital to analog conversion (DAC) module. Its working principle is:

指令接收装置用于接收外部调光指令，并将该指令发送给 MCU; MCU分析处理调光指令，得到调光指令信息，并将调光指令信息发送给 DAC模块， DAC模块将调光指令信息转换成模拟信号发送至各个电源模块，电源模块会根据从 DAC模块处接收来的模拟信号，使自身的输出以预定频率变化的电压（附带有模拟信号），通过电线将附带有模拟信号的电压输送至各个直流供电 LED路灯。直流供电 LED路灯：电压转换电路将电线中传输来的模拟信号从高压状态转换成低压状态，也即将电线中传输来的高压模拟信号转换成低压模拟信号，再送给 ADC模块， ADC模块通过 AD采样提取出模拟信号，并将此信号转换成数字信号，发送给单片机，单片机对此数字信号进行分析后，控制恒流电路； ADC模块又称电压采样模块。 The instruction receiving device is configured to receive an external dimming command and send the command to the MCU; the MCU analyzes and processes the dimming command, obtains dimming command information, and sends the dimming command information to the DAC module, and the DAC module sets the dimming command information Converted into an analog signal sent to each power module, the power module will make its own output change voltage at a predetermined frequency (with analog signal) according to the analog signal received from the DAC module, and the voltage with the analog signal will be supplied through the wire. It is delivered to each DC-powered LED street light. DC-powered LED street light: The voltage conversion circuit converts the analog signal transmitted from the wire from a high-voltage state to a low-voltage state. It also converts the high-voltage analog signal transmitted from the wire into a low-voltage analog signal, which is then sent to the ADC module, and the ADC module is sampled by AD. The analog signal is extracted, and the signal is converted into a digital signal and sent to the single chip microcomputer, and the single chip computer analyzes the digital signal to control the constant current circuit; the ADC module is also called a voltage sampling module.

指令接收装置、主控芯片（MCU )、数模转换（DAC )模块如图 2所示，本发明具体实施例的 LED路灯***控制信号传输接收方法，具体流程包括以下步骤： The instruction receiving device, the main control chip (MCU), and the digital-to-analog conversion (DAC) module, as shown in FIG. 2, the LED street lamp system control signal transmission receiving method according to the embodiment of the present invention, the specific process includes the following steps:

301 )上电开始; 301) power on begins;

302 )中央直流电源机拒的 MCU控制电源模块以 DC250V输出； 302) The MCU control power module rejected by the central DC power supply is outputted by DC250V;

303 )判断是否收到指令接收装置通过串口转发给 MCU的外部调光指令？是进入下一步，否则返回步骤 302 ); 303) judging whether an external dimming instruction that the instruction receiving device forwards to the MCU through the serial port is received? Go to the next step, otherwise return to step 302);

304 ) MCU提取该外部调光指令，按字节处理，按照 DAC模块的接收格式将数据发送给 DAC模块处理，并使 DAC模块输出如图 3 所示的模拟信号给电源模块。 304) The MCU extracts the external dimming command, processes it in bytes, sends the data to the DAC module according to the receiving format of the DAC module, and causes the DAC module to output an analog signal as shown in FIG. 3 to the power module.

其中， among them,

t0>1.5P , tl=0.6P+200mP , t2=0.5P+200mP , t3=0.5P+200mP,t4=1.5P+200mP T0>1.5P, tl=0.6P+200mP, t2=0.5P+200mP, t3=0.5P+200mP, t4=1.5P+200mP

注: P为一个单位的时间，典型值为 1P=1秒。 t0、 tl、 t2、 t3和 t4 分别代表不同时间段。这样， MCU在向电源模块输出一条控制信号时，会使 DAC模块依次输出下面的电压值： DAC模块先输出 5V的电压，并且持续时间为 t0; DAC模块再输出从 5V到 4.4V的、随时间呈线性变化的电压值，这个过程需要的时间为 tl； DAC模块再输出持续时间为 t0的，电压值为 4.4V的电压（4.4V电压为低电压，低电压持续时间为 t2表示要传输的数据为二进制数 0,低电压持续时间为 t4表示要传输的数据为二进制数 1 ); DAC模块再输出从 4.4V到 5V随时间呈线性变化的电压，这个时间为 tl ; ...... DAC模块按照此规律输出 6次持续时间为 t2的 4.4V低电压之后，再按照同样的规律，输出 2次持续时间为 _t4的 4.4V低电压； DAC模块再输出从 4.4V到 5V持续变化的电压，并在电压升到 5V之后，输出持续时间为 t0的 5V高电压。此时， DAC模块已将一个字节的数据 ( 8个数据位 )传输给了电源模块。如果控制器的 MCU判断指令信号还没有发送完毕，则会按照上述方式，进行下一个字节的传输。否则，控制器的 MCU会让 DAC模块持续输出 5V的电压。 Note: P is a unit of time, with a typical value of 1P = 1 second. T0, tl, t2, t3, and t4 represent different time periods, respectively. In this way, when the MCU outputs a control signal to the power module, the DAC module sequentially outputs the following voltage values: The DAC module first outputs a voltage of 5V, and the duration is t0; the DAC module outputs an output from 5V to 4.4V. The time varies linearly, the time required for this process is tl; the DAC module re-outputs the duration of t0, the voltage is 4.4V (4.4V is low voltage, and the low voltage duration is t2 indicates transmission) The data is binary number 0, the low voltage duration is t4, indicating that the data to be transmitted is a binary number 1); the DAC module outputs a voltage that varies linearly from 4.4V to 5V over time, this time is tl; .... The DAC module outputs 6 low voltages of 4.4V with a duration of t2 according to this rule, and then outputs 2 low voltages of 4.4V with a duration of _t 4 according to the same rule; the DAC module re-outputs from 4.4V to 5V. The continuously changing voltage, and after the voltage rises to 5V, outputs a high voltage of 5V for a duration of t0. At this point, the DAC module has transferred one byte of data (8 data bits) to the power module. If the MCU of the controller determines that the command signal has not been sent yet, the next byte will be transmitted as described above. Otherwise, the controller's MCU will let the DAC module continue to output 5V.

(注：图 3所示波形表示控制器的 MCU要传输给电源模块的数据为十六进制数 0x03 , 也就是二进制数 0000 0011 , 在实际应用时，控制器的 MCU会根据要传输的数据，来确定传输时 '0'和 T的个数和顺序，从而确定 4.4V低电压的持续时间 t2和 t4。 ) (Note: The waveform shown in Figure 3 indicates that the data to be transmitted to the power module by the MCU of the controller is hexadecimal 0x03, which is the binary number 0000 0011. In actual application, the MCU of the controller will be based on the data to be transmitted. To determine the number and order of '0' and T during transmission to determine the duration of the 4.4V low voltage, t2 and t4.

305 )电源模块在接收到上述 DAC模块输出的信号时，会同时改变自身的输出电压，并且电源模块的输出电压与 DAC模块的输出电压成正比例关系。 DAC模块输出的 5V电压对应电源模块的输出电压为 250V, DAC模块输出的 4.4V 电压对应电源模块的输出电压为 220 V, 电压通过电线传输给 LED路灯，具体如图 4所示。 305) When receiving the signal output by the DAC module, the power module changes its own output voltage at the same time, and the output voltage of the power module is proportional to the output voltage of the DAC module. The 5V voltage output by the DAC module corresponds to the output voltage of the power module. For 250V, the 4.4V voltage output from the DAC module corresponds to the output voltage of the power module is 220 V, and the voltage is transmitted to the LED street lamp through the wire, as shown in Figure 4.

306 ) LED 路灯的电压转换电路首先将从电源模块接收到的 DC220V-DC250V 高压信号转换成 2.7V-3.3V低压信号，然后交给 ADC模块处理， ADC模块采用定时采样的方式，采样周期为 T, 把采集到的模拟信号转换成数字信号交给单片机处理，单片机在按照约定规律处理完指定个数的数据字节之后，通过操作恒流驱动电路来操作 LED光源模块，来完成信号接收后的执行操作。如图 5所示，本发明具体实施例一的 LED路灯包括电压转换电路、 ADC模块、单片机、恒流电路和 LED光源，所述电压转换电路与中央直流电源机拒通过电线电连接。其工作原理是： 306) The voltage conversion circuit of the LED street lamp first converts the DC220V-DC250V high-voltage signal received from the power module into a 2.7V-3.3V low-voltage signal, and then delivers it to the ADC module for processing. The ADC module adopts timing sampling mode, and the sampling period is T. Converting the collected analog signal into a digital signal and handing it to the MCU for processing. After processing the specified number of data bytes according to the convention, the MCU operates the LED light source module by operating the constant current driving circuit to complete the signal receiving. Perform the operation. As shown in FIG. 5, an LED street lamp according to a first embodiment of the present invention includes a voltage conversion circuit, an ADC module, a single chip microcomputer, a constant current circuit, and an LED light source. The voltage conversion circuit and the central DC power source are electrically connected by wires. Its working principle is:

LED路灯的电压转换电路首先将从中央直流电源机拒的电源模块接收到的 DC220V-DC250V高压信号转换成 2.7V-3.3V低压信号，然后交给 ADC模块处理， ADC模块采用定时采样的方式，采样周期为 T, 把采集到的模拟信号转换成数字信号交给单片机处理，单片机这样按约定规律处理： LED路灯上电瞬间， ADC模块检测到的电压为高电平，因此，单片机设置 signal=l , signal是一个布尔型的变量，用来标识单片机在处理 ADC模块采集到的电压值是低电平状态还是高电平状态。 ADC模块采集 M次电压值交给单片机（M>20, 是一个整型变量），单片机将这 M个电压值按从小到大顺序排列，并去除 4个最大值和 4个最小值，取剩下的 (M-8)次电压值的平均值存入数组 VOL[0] , 数组 VOL是一个长度为 4的一维数组，用来保存单片机在处理信号过程中的平均电压值。单片机按此规律再得到 3个平均电压值，分别存入 VOL[l]、 VOL[2]和 VOL[3]。 The voltage conversion circuit of the LED street lamp first converts the DC220V-DC250V high-voltage signal received from the power module rejected by the central DC power supply into a 2.7V-3.3V low-voltage signal, and then delivers it to the ADC module for processing, and the ADC module adopts a timing sampling method. The sampling period is T, and the collected analog signal is converted into a digital signal and sent to the single-chip microcomputer for processing. The single-chip microcomputer processes according to the convention: the LED street lamp is powered on, and the voltage detected by the ADC module is high level. Therefore, the single-chip microcomputer sets signal= l , signal is a Boolean variable, used to identify whether the voltage value collected by the microcontroller in the ADC module is low state or high state. The ADC module collects the M voltage value and gives it to the MCU (M>20, which is an integer variable). The MCU sorts the M voltage values from small to large, and removes 4 maximum and 4 minimum values. The average value of the lower (M-8) voltage values is stored in the array VOL[0], the array VOL is a one-dimensional array of length 4, which is used to store the average voltage value of the microcontroller during processing. According to this rule, the MCU obtains three average voltage values and stores them in VOL[l], VOL[2] and VOL[3].

经过 1 个采样周期 T 之后，单片机使 VOL[0]=VOL[1] , VOL[l]=VOL[2], VOL[2]=VOL[3], ADC模块再次采集 M次电压值，交给单片机，单片机按照上述方式得到这些电压的平均值，存入数组变量 VOL[3]。每经过 1个采样周期，单片机就按照此方式更新 VOL 数组的值。并比较这四个值：如果数组 VOL的 4个元素之间的差值在误差范围之内，单片机则判定是"电压平稳状态"；如果 VOL[0]-VOL[l]>Differ , VOL[l]-VOL[2]>Differ , After one sampling period T, the MCU makes VOL[0]=VOL[1], VOL[l]=VOL[2], VOL[2]=VOL[3], and the ADC module collects M voltage values again. For the single-chip microcomputer, the single-chip microcomputer obtains the average value of these voltages in the above manner and stores it in the array variable VOL[3]. The microcontroller updates the value of the VOL array in this way every 1 sample period. And compare these four values: If the difference between the four elements of the array VOL is within the error range, the MCU determines that it is "voltage steady state"; if VOL[0]-VOL[l]>Differ, VOL[ l]-VOL[2]>Differ,

VOL[2]-VOL[3]>Differ ( Differ 的值要根据具体的 tl 时间值而定） , 单片机则判定为"电压下降沿状态"，此时，设置信号标志位 Signal— Flag=0, Signal— Flag是单片机为了识别信号电平变化而设置的一个临时变量；如果 VOL[l]-VOL[0]>Differ, VOL[2]-VOL[l]>Differ, VOL[3]-VOL[2]>Differ, 单片机则判定为"电压上升沿状态"，并设置信号标志位 Signal— Flag=l。 VOL[2]-VOL[3]>Differ (The value of Differ depends on the specific tl time value), and the MCU determines it as "voltage falling edge state". At this time, set the signal flag Signal-Fat=0. Signal—Fat is a temporary variable set by the MCU to identify signal level changes; if VOL[l]-VOL[0]>Differ, VOL[2]-VOL[l]>Differ, VOL[3]-VOL[ 2]>Differ, the MCU determines the "voltage rising edge state" and sets the signal flag Signal_Fatmark=l.

在上述过程中，单片机上电时默认 signal的值为 1 , 之后单片机会根据 "电压平稳状态"、 "电压下降沿状态"和"电压上升沿状态"来判定 signal的值。若单片机判定了是"电压平稳状态"，此时 Signal— Flag 的值为 0,表明此电压平稳状态是刚刚经过了一个电压下降沿，因此，单片机判定 signal=0 ; 如果单片机在判定了电压平稳状态时， siganl— Flag的值为 1 , 表明此电压平稳状态是刚刚经过了一个电压上升沿，因此，单片机判定 signal=l。单片机根据 signal的 0或 1状态，可以得出如图 6所示的波形。 In the above process, the value of the default signal is 1 when the microcontroller is powered on, and then the microcontroller will determine the value of signal according to the "voltage steady state", "voltage falling edge state" and "voltage rising edge state". If the MCU determines that it is "voltage steady state", then the value of Signal-Flag is 0, indicating that the voltage steady state has just passed a voltage falling edge. Therefore, the MCU determines that signal=0; if the MCU determines that the voltage is stable In the state, the value of siganl_flag is 1, indicating that the voltage plateau is just after a voltage. The rising edge, therefore, the microcontroller determines signal=l. According to the 0 or 1 state of signal, the MCU can get the waveform shown in Figure 6.

以下过程中，单片机根据 signal的 0或 1状态，利用状态机思想，最终分析出控制信号： In the following process, the MCU uses the state machine idea based on the 0 or 1 state of the signal to finally analyze the control signal:

单片机上电时默认 siganl=l , state=l , state是单片机为了标识信号分析过程中的步骤而设置的一个变量。如图 7 所示，当单片机从 state=l检测到 siganl为 0, 并且状态 1持续的时间满足要求，则使 state=2 , 并清空数据緩沖区；当单片机从 state=2检测到 signal为 1 , 则使 state=3 , 此时单片机会根据状态 2持续的时间，判断是数据位 0 还是数据位 1 , 并存入数据緩沖区；单片机依此规律判断状态 2的持续时间，得到数据位，当单片机中的程序运行到第 8个状态 2时，如果检测到 siganl=l , 则进入状态 4。之后跟踪状态 4的持续时间，当这个时间超过一定的值时，表明数据字节传输完毕，单片机处理该字节。 When the MCU is powered on, the default siganl=l, state=l, state is a variable set by the MCU to identify the steps in the signal analysis process. As shown in Figure 7, when the microcontroller detects that siganl is 0 from state=l, and the duration of state 1 meets the requirement, then state=2 and clear the data buffer; when the microcontroller detects signal from state=2, it is 1 , then state=3, at this time, the MCU will judge whether it is data bit 0 or data bit 1 according to the duration of state 2, and store it in the data buffer; the MCU judges the duration of state 2 according to this law, and obtains the data bit. When the program in the microcontroller reaches the 8th state 2, if siganl=l is detected, the state 4 is entered. The duration of state 4 is then tracked. When this time exceeds a certain value, it indicates that the data byte has been transferred and the microcontroller processes the byte.

单片机在按照上述规律处理完指定个数的数据字节之后，通过操作恒流电路来控制 LED光源，来完成信号接收后的执行操作。 After processing the specified number of data bytes according to the above rules, the single chip microcomputer controls the LED light source by operating the constant current circuit to complete the operation after the signal is received.

本发明的 LED路灯还可根据电线上其他约定的电压变化规律，在接收端按对应电压变化特点处理后输出 "0"或 "1"。如图 8所示，本发明具体实施例二的 LED路灯包括电压转换电路、 ADC模块、单片机、 PWM调光器、恒流电路和 LED光源。 LED 路灯的电压转换电路首先将从电源模块接收到的 DC220V-DC250V 高压信号转换成 2.7V-3.3V低压信号，然后交给 ADC模块处理， ADC模块采用定时采样的方式，采样周期为 T, 把采集到的模拟信号转换成数字信号交给单片机处理，单片机在按照约定规律解析处理完将调光信号发送给 PWM调光器；恒流电路根据 PWM调光器输出控制信号驱动 LED光源。与现有技术相比较，本发明通过施加不同的高压信号对 LED路灯进行供电和显示状态控制，具有供电和控制合一的特点，大大节省 LED照明***新建和维护成本，进一步还提高了整体寿命和可靠性。 The LED street lamp of the invention can also output "0" or "1" after being processed according to the corresponding voltage change characteristics at the receiving end according to other agreed voltage variation rules on the electric wire. As shown in FIG. 8, the LED street lamp of the second embodiment of the present invention includes a voltage conversion circuit, an ADC module, a single chip microcomputer, a PWM dimmer, a constant current circuit, and an LED light source. The voltage conversion circuit of the LED street lamp first converts the DC220V-DC250V high-voltage signal received from the power module into a 2.7V-3.3V low-voltage signal, and then delivers it to the ADC module for processing. The ADC module adopts the timing sampling method, and the sampling period is T, The collected analog signal is converted into a digital signal and sent to the single-chip microcomputer for processing. The single-chip microcomputer sends the dimming signal to the PWM dimmer after being parsed according to the agreed law; the constant current circuit drives the LED light source according to the PWM dimmer output control signal. Compared with the prior art, the present invention controls the power supply and display state of the LED street lamp by applying different high-voltage signals, and has the characteristics of power supply and control integration, greatly saving the new construction and maintenance cost of the LED lighting system, and further improving the overall life. And reliability.

Claims

权利要求书 Claim

1、一种直流高压供电 LED路灯***，其特征在于，包括：中央直流电源机拒，用于输出不同的高压信号；以及 1. A DC high voltage power supply LED street lamp system, comprising: a central DC power supply rejection for outputting different high voltage signals;

2、根据权利要求 1所述的一种直流高压供电 LED路灯***，其特征在于，所述不同的高压信号包括第一高压信号和第二高压信号，中央直流电源机拒输出的第一高压信号的持续时长与中央直流电源机拒输出的第二高压信号的持续时长不同。 2 . The DC high voltage power supply LED street lamp system according to claim 1 , wherein the different high voltage signals comprise a first high voltage signal and a second high voltage signal, and the first high voltage signal rejected by the central DC power source The duration of the second high voltage signal that is rejected by the central DC power supply is different.

3、根据权利要求 1所述的一种直流高压供电 LED路灯***，其特征在于，所述不同的高压信号包括第一高压信号、第一高压到第二高压线性变化信号、第二高压信号、以及第二高压到第一高压线性变化信号，所述第一高压信号、第一高压到第二高压线性变化信号、第二高压信号、以及第二高压到第一高压线性变化信号的持续时长不完全相同。 3 . The DC high voltage power supply LED street lamp system according to claim 1 , wherein the different high voltage signals comprise a first high voltage signal, a first high voltage to a second high voltage linear change signal, a second high voltage signal, And a second high voltage to the first high voltage linear change signal, the duration of the first high voltage signal, the first high voltage to the second high voltage linear change signal, the second high voltage signal, and the second high voltage to the first high voltage linear change signal are not It's exactly the same.

4、根据权利要求 1所述的一种直流高压供电 LED路灯***，其特征在于，所述中央直流电源机拒包括依次电连接的主控芯片、数模转换模块和电源模块。 The DC high-voltage power supply LED street lamp system according to claim 1, wherein the central DC power supply device comprises a main control chip, a digital-to-analog conversion module and a power supply module that are electrically connected in sequence.

5、根据权利要求 1所述的一种直流高压供电 LED路灯***，其特征在于，所述 LED路灯包括依次电连接的电压转换模块、模数转换模块、单片机、恒流电路和 LED光源，其中，电压转换电路将电线中传输来的高压模拟信号转换成低压模拟信号，再将低压模拟信号送给模数转换模块，模数转换模块通过模数采样提取出模拟信号，并将此模拟信号转换成数字信号，发送给单片机，单片机对此数字信号进行分析后，驱动恒流电路控制 LED光源的显示状态。 5 . The DC high voltage power supply LED street lamp system according to claim 1 , wherein the LED street lamp comprises a voltage conversion module, an analog to digital conversion module, a single chip microcomputer, a constant current circuit and an LED light source, which are electrically connected in sequence, wherein The voltage conversion circuit converts the high voltage analog signal transmitted from the wire into a low voltage analog signal, and then sends the low voltage analog signal to the analog to digital conversion module, and the analog to digital conversion module extracts the analog signal through analog to digital sampling, and converts the analog signal. The digital signal is sent to the single chip microcomputer, and the single chip computer analyzes the digital signal, and drives the constant current circuit to control the display state of the LED light source.

6、一种直流高压供电 LED路灯***的实现方法，其特征在于，包括： 6. A method for realizing a DC high voltage power supply LED street lamp system, characterized in that:

7、根据权利要求 6所述的一种直流高压供电 LED路灯***的实现方法，其特征在于，所述不同的高压信号包括第一高压信号和第二高压信号，中央直流电源机拒输出的第一高压信号的持续时长与中央直流电源机拒输出的第二高压信号的持续时长不同。 The method for realizing a DC high voltage power supply LED street lamp system according to claim 6, wherein the different high voltage signals comprise a first high voltage signal and a second high voltage signal, and the central DC power source rejects the output. The duration of a high voltage signal is different from the duration of the second high voltage signal rejected by the central DC power source.

8、根据权利要求 6所述的一种直流高压供电 LED路灯***的实现方法，其特征在于，所述不同的高压信号包括第一高压信号、第一高压到第二高压线性变化信号、第二高压信号、以及第二高压到第一高压线性变化信号，所述第一高压信号、第一高压到第二高压线性变化信号、第二高压信号、以及第二高压到第一高压线性变化信号的持续时长不完全相同。 The method for realizing a DC high voltage power supply LED street lamp system according to claim 6, wherein the different high voltage signals comprise a first high voltage signal, a first high voltage to a second high voltage linear change signal, and a second a high voltage signal, and a second high voltage to a first high voltage linear change signal, the first high voltage signal, the first high voltage to the second high voltage linear change The duration of the second signal, the second high voltage signal, and the second high voltage to the first high voltage linear change signal are not exactly the same.

9、根据权利要求 6所述的一种直流高压供电 LED路灯***的实现方法，其特征在于，所述 LED路灯包括依次电连接的电压转换模块、模数转换模块、单片机、恒流电路和 LED光源，其中，电压转换电路将电线中传输来的高压模拟信号转换成低压模拟信号，再将低压模拟信号送给模数转换模块，模数转换模块通过模数采样提取出模拟信号，并将此模拟信号转换成数字信号，发送给单片机，单片机对此数字信号进行分析后，驱动恒流电路控制 LED光源的显示状态。 The method for realizing a DC high voltage power supply LED street lamp system according to claim 6, wherein the LED street lamp comprises a voltage conversion module, an analog to digital conversion module, a single chip microcomputer, a constant current circuit and an LED electrically connected in sequence. a light source, wherein the voltage conversion circuit converts the high voltage analog signal transmitted from the wire into a low voltage analog signal, and then sends the low voltage analog signal to the analog to digital conversion module, and the analog to digital conversion module extracts the analog signal through analog to digital sampling, and The analog signal is converted into a digital signal and sent to the single chip microcomputer. After the single chip computer analyzes the digital signal, the constant current circuit is driven to control the display state of the LED light source.

10、根据权利要求 6所述的一种直流高压供电 LED路灯***的实现方法，其特征在于，所述中央直流电源机拒与 LED路灯之间通过总线或星型网的电线的连接结构进行相互连接。 The method for realizing a DC high-voltage power supply LED street lamp system according to claim 6, wherein the central DC power supply refuses to communicate with the LED street lamp through a bus or a star network connection structure. connection.