KR20220001209A - Light control system using power line communication - Google Patents

Abstract

Provided is a light control system using power line communications. The light control system using power line communications includes a master (10) for transmitting data and multiple slaves (20) for controlling lighting units (30) connected thereto according to data received from the master (10), wherein the lighting unit (30) includes: at least one module (310) each provided with an LED light (311); a dimming converter (340) outputting a dimming control signal for the LED light (311) under the control of the slaves (30); an isolation switch (320) disconnecting a dimming signal line (DS) connected from the dimming converter (340) to the module; and a dimming switching driver (330) detecting whether there is an abnormality in the slaves (20) to operate the isolation switch (320).

Description

Lighting control system using power line communication {LIGHT CONTROL SYSTEM USING POWER LINE COMMUNICATION}

The present invention relates to a lighting control system using power line communication.

Conventionally, in order to adjust the illuminance of lighting, current control or voltage control is configured differently depending on the characteristics of lighting, so that when a plurality of lights are used, there is a problem that an illuminance control corresponding to the corresponding lighting needs to be separately installed.

In addition, it is difficult to centrally control the information required for illuminance control, and when using a wired connection, the cost to install a separate communication line increases. And there is a problem that there is a possibility of data loss due to confusion. As a result, in a building using a plurality of lights in an independent space, the conventional illumination control method cannot be applied.

Therefore, conventionally, techniques for controlling the illuminance of lighting using a power line communication method have been proposed.

The conventional lighting control system using power line communication controls the illuminance of the lighting device in a slave receiving a control command from the master through power line communication, and responds from the slave to the master.

In the AC phase control power line communication method, the transmission method from the slave to the master is a method of consuming power to transform the current waveform and monitoring the current from the master.

In such a conventional power line communication method, for example, when directly controlling AC 220V, when 1A is consumed at DC 12V, the power becomes 12W, so a power signal can be delivered to the master 10 by a momentary short circuit. have.

However, in the case of direct control of AC 220V, when AC 220V is converted to DC, it becomes DC 311V. There is a problem in that the capacity of the control element is large and the heat dissipation of the instantaneous power element is required.

In addition, in the conventional lighting system using power line communication, dimming control of LED lighting is performed by control of each slave. This will be described with reference to FIG. 1 .

1 is a block diagram illustrating a conventional dimming control device.

Referring to FIG. 1 , the conventional dimming control device includes a plurality of modules 4 each having an LED light, and each module 4 is lit by power supplied from a lighting power source 5 . Here, the modules 5 emit light with different illuminances according to the dimming control signal of the 0 to 10V power output from the D/A converter 2 under the control of the CPU 1 for dimming control.

However, in the conventional dimming system as described above, when the CPU 1 malfunctions or a power supply problem occurs, the D/A converter 2 malfunctions so that the output trembles in a pulse waveform or an unintended value is output. Therefore, the LED lighting has a problem in that the pulse waveform is trembling as above, and the flickering phenomenon or light is lit at low illuminance due to a low-level signal.

Registered Patent Publication No. 10-1263066 (2013.05.03)

Therefore, the present invention has been devised to solve the problems of the prior art, and an object of the present invention is to prevent damage caused by instantaneous power when a signal is transmitted from a slave to a master. Lighting using power line communication To provide a control system.

In addition, another object of the present invention is to provide a lighting control system using power line communication in which LED lighting can be illuminated with an output of 100% so as to minimize user inconvenience when an abnormality occurs in the control device.

The present invention includes the following examples to achieve the above object.

An embodiment of the present invention includes a master that transmits data, and a plurality of slaves that control a connected lighting unit according to data received from the master, and the lighting unit includes one or more modules each having an LED light, and the control of the slave The dimming converter that outputs the dimming control signal of LED lighting by means of It may include a lighting control system using powerline communication that includes a dimming switching driver that activates it.

Therefore, in the present invention, when a failure of a control device controlling a dimming signal or a failure of a signal output device occurs, the dimming signal line is completely cut off so that the LED light can be turned on at 100% output, thereby minimizing user inconvenience. have.

In addition, the present invention can consume the instantaneous power generated when data is transmitted from the slave to the master, thereby preventing damage to parts.

In addition, according to the present invention, instantaneous power generated when data is transmitted from the slave to the master is stored and supplied as the operating power of the slave, so that energy can be recycled.

1 is a block diagram illustrating a conventional dimming control device.
2 is a block diagram illustrating a lighting control system using power line communication according to the present invention.
3 is a block diagram of a slave.
4 is a block diagram illustrating another embodiment of a slave.
5 is a block diagram illustrating a lighting unit.
6 is a view showing an isolation switch.
7 is a flowchart illustrating a lighting control method using power line communication according to the present invention.

Although the present invention can be made various changes and can have various embodiments, it will be described in detail by exemplifying specific embodiments in the drawings. This is not intended to limit the present invention to a specific embodiment, and to any one of all modifications, equivalents or substitutes included in the spirit and scope of the present invention for connecting and/or fixing structures extending in different directions. should be understood as applicable.

The terminology used herein is used only to describe specific embodiments, and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that the existence or addition of numbers, steps, operations, components, parts, or combinations thereof does not preclude the possibility of addition.

In addition, in the description of the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, a preferred embodiment of a lighting control system using power line communication according to the present invention will be described with reference to the accompanying drawings.

2 is a block diagram illustrating a lighting control system using power line communication according to the present invention.

Referring to FIG. 2 , the present invention includes a master 10 and a plurality of slaves 20 that are communicatively connected to the master 10 through a power line to control one or more lighting units 30 .

The master 10 switches the AC power to generate data according to the quaternary system, transmits it to the slave 20, and monitors the response signal received from the slave 20 to extract data.

For example, the master 10 transmits data by switching (shorting) the AC power during a time period set according to the peak value of power by an external input signal (eg, a signal transmitted from a terminal capable of wired/wireless communication) or a set program. It transmits to the slave 20 and receives data received from the slave 20 .

Herein, the external signal is data input from an external communication network or a wired-connected terminal, and corresponds to a signal transmitted from a terminal connected to the external communication network or wired for data and/or a command to be transmitted to each slave 20 .

The slave 20 detects a waveform deformed from the AC power line to receive data, and interprets a command included in the received data to control the lighting unit 30 . And the slave 20 transmits a response from the master 10 . Here, the slave 20 typically generates data by applying a current load to the AC power line.

In the conventional method of transmitting from the slave 20 to the master 10, instantaneous power can be generated, and a separate heat dissipation means has to be added to prevent overheating of the control element by the generated instantaneous power.

Therefore, the present invention includes a means for preventing loss of parts due to instantaneous power generated in response from the slave 20 to the master 10 as described above, which will be described with reference to FIG. 2 .

2 is a block diagram illustrating a slave.

Referring to FIG. 2 , the slave 20 includes an instantaneous power input unit 210 that consumes instantaneous power generated when transmitting a signal to the master 10 , and an illumination unit 30 by receiving a signal from the master 10 . A slave controller 220 to control may be included.

The slave controller 220 extracts the data received from the master 10, and according to the control command (eg, on/off, dimming control) of the lighting unit 30 included in the data, the lighting unit 30 to control In addition, the slave controller 220 transmits data in a manner that transforms the AC waveform by applying a current load (short circuit) to the AC power line in response to the transmission data of the master 10 .

The instantaneous power input unit 210 charges the instantaneous power output from the rectifying means 211 for rectifying the AC power, the switching driver 212 for switching the first switching element Q1, and the first switching element Q1. and a power consuming device 214 that consumes instantaneous power discharged from the charging device 213 and the charging device 213 .

The rectifying means 211 rectifies the AC instantaneous power into DC and outputs it to the power line connected to the first switching element Q1.

The switching driver 212 turns on/off the first switching element Q1 under the control of the slave controller 220 .

For example, the slave controller 220 may transform a waveform by applying a current load from the AC power line to transmit data to the master 10 , and simultaneously drive the switching driver 212 . Therefore, the switching driver 212 turns on the first switching element Q1 at the same time when data is transmitted to the master 10 under the control of the slave controller 220 .

The first switching element Q1 turns on/off the power line between the rectifying means 211 and the charging element 213 and the power consuming element 214 . For example, the first switching element Q1 is an FET or TR, and is connected to the power line of the switching driver 212 at the base, the rectifying means 211 at the input terminal, and the charging element 213 at the output terminal. Accordingly, the first switching element Q1 is turned on under the control of the switching driver 212 and outputs DC output from the rectifying means 211 to the charging element 213 .

The charging device 213 is, for example, a capacitor, and discharges the power output through the first switching device Q1 to the power consuming device 214 after charging for a predetermined period of time. That is, the instantaneous power generated due to the short circuit of the AC power under the control of the slave controller 220 is rapidly charged to the charging device 213 through the first switching device Q1 and then discharged.

The power consuming device 214 consumes the current discharged from the charging device 213 as a resistor applied to both ends of the charging device 213 , for example.

That is, according to the present invention, instantaneous power generated by short-circuiting the AC power line in the slave controller 220 to apply a current load can be rapidly charged to the charging device 213 and then consumed through the power consuming device 214. Otherwise, it is possible to prevent component damage caused by instantaneous power.

In addition, in the present invention, instantaneous power generated during transmission of the slave 20 may be used as the driving power of the slave 20 . This will be described with reference to FIG. 4 .

4 is a view showing another embodiment of the slave 20.

Referring to FIG. 4 , the slave 20 converts instantaneous power output from the instantaneous power input unit 210 , the slave controller 220 , and the instantaneous power input unit 210 for receiving instantaneous power generated from the AC power line. It may include a conversion converter 230 , a storage means 240 for storing the power converted by the conversion converter 230 , and a main power source means 250 .

The instantaneous power input unit 210 may include a rectifying means 211 , a first switching element Q1 , and a switching driver 212 .

Here, the first switching element Q1 outputs the instantaneous power output from the rectifying means 211 to the conversion converter 230 .

The conversion converter 230 as a DC/DC converter converts the DC output from the instantaneous power input unit 210 into DC of a set level and outputs the converted DC.

The storage means 240 charges the instantaneous power converted in the conversion converter 230 as, for example, a battery or a super capacitor and supplies it as driving power of the slave controller 220 .

The main power supply unit 250 is a device for supplying driving power to the slave 20 .

That is, another embodiment of the present invention includes both the main power source means 250 and the storage means 240 for storing instantaneous power, and uses it as the driving power of the slave 20 rather than consuming instantaneous power. characterized.

The lighting unit 30 includes one or more modules 310 , respectively, and the brightness may be varied according to a dimming control command by the slave controller 220 . The lighting unit 30 will be described with reference to FIGS. 5 and 6 .

5 is a block diagram illustrating a lighting unit, and FIG. 6 is a diagram illustrating an isolation switch.

5 and 6 , the lighting unit 30 includes a plurality of modules 310 having an LED light 311 emitting light with power supplied by the lighting power source 5 , and is connected to the module 310 . The isolation switch 320 for insulating and/or energizing the dimming signal line DS, the dimming switching driver 330 for controlling the isolation switch 320 by monitoring the state of the slave controller 220, and a dimming signal are output and a dimming converter 340 that does.

The module 310 includes an LED light 311 that is emitted by power supplied from the lighting power source, and a pull-up means 312 that turns on the LED light 311 at 100% output when the dimming signal line DS is turned off. include

The LED light 311 is lit with power supplied by the lighting power source, and the brightness is adjusted according to 0 to 10V (maximum brightness O, minimum illumination 10V) input through the dimming signal line DS.

The pull-up means 312 consists of a diode and a pull-up resistor R1 installed on the dimming signal line DS in parallel with the LED lighting 311 . Here, the pull-up resistor R1 is installed between the Vcc power supply and the diode, and the output side of the LED light is connected between the pull-up resistor and the diode.

When the dimming signal line DS is opened, the LED light 311 may be illuminated at 100% of the rated output as the pull-up resistor R1 and the diode are connected to the output-side power line.

The isolation switch 320 is, for example, a photo-coupler, in which a light emitting element is connected to the dimming switching driver 330 and a light receiving element is connected to the dimming signal line DS. The light emitting device emits light according to the operation of the dimming switching driver 330 , and the light receiving device 322 is turned on when light is output from the light emitting device 321 , and a dimming signal line between the dimming converter 340 and the module 310 ( DS) is energized.

That is, the isolation switch 320 insulates the control signal line CS connected from the slave controller 220 and the dimming signal line DS between the converter and the module 310 so that an abnormality may occur in the slave controller 220 . In this case, the dimming signal line DS may be completely opened.

Therefore, the present invention solves the conventional problem that the LED light 311 flickers or lights with low output due to the unstable power output from the D/A converter due to the failure of the CPU as in the prior art.

The dimming switching driver 330 turns on/off the light emitting device 321 of the isolation switch 320 according to the output value of the state monitoring means 331 for monitoring whether the slave controller 220 is abnormal, and the state monitoring means 331 . and a second switching element 332 (Q2).

The state monitoring means 331 monitors the state of the slave controller 220 as a watch dog timer, for example, and turns off the second switching element 332 when an abnormality occurs.

The second switching element 332 turns off the light emitting element 321 of the insulating switch 320 while being turned off according to the control signal of the state monitoring means 331 .

The dimming converter 340 outputs the power supplied from the main power source 250 to the set level of power (eg, 0 to 10V) to the dimming signal line DS under the control of the slave controller 220 .

The present invention includes the configuration as described above, and below, a lighting control method using power line communication according to the present invention achieved by the above configurations will be described.

7 is a flowchart illustrating a lighting control method using power line communication according to the present invention.

Referring to FIG. 7 , the present invention includes a step S10 of transmitting a control signal from the master 10, a step S20 of dimming control from the slave 20, and a step S30 of responding to the master 10 from the slave 20. may include

Here, step S30 may be performed before or after step S20. That is, the order of the above steps is not limited, and various applications are possible depending on the situation.

Step S10 is a step of transmitting data from the master 10 to the slave 20 . The master 10 may transmit data by detecting a peak value or zero crossing of the AC power and controlling the phase of the AC power. A known technique may be applied to this.

Step S20 is a step in which the slave 20 controls dimming of the lighting unit 30 . Here, the lighting control of the slave 20 may be performed by a command of the master 10 or a set program.

Specifically, the slave controller 220 controls the dimming converter 340 to output, for example, a dimming control signal of 0 to 10V, and drives the dimming switching driver 330 to insulate The switch 320 is turned on.

Accordingly, the dimming control signal is input to each module 310 of the lighting unit 30 along the dimming signal line DS. Therefore, the brightness of the LED light 311 is adjusted according to the dimming control signal.

Here, the dimming switching driver 330 detects that a failure occurs in the slave controller 220 and controls the isolation switch 320 to open the dimming signal line. That is, the dimming switching driver 330 monitors the state of the slave controller 220 connected through the control signal line CS and when an abnormality is detected, the second second connected to the light emitting element 321 of the isolation switch 320 . The isolation switch 320 is turned off by controlling the switching element 332 .

Accordingly, the dimming signal line DS is opened as the isolation switch 320 is turned off.

And the LED light 311 is illuminated at 100% output as the dimming signal line DS is opened.

That is, the present invention perfectly opens the dimming signal line DS in order to solve the conventional problem that an unstable signal is output to the dimming signal line when the control device fails. Due to this, the LED light can be turned on with 100% output as set.

Step S30 is a step in which the slave 20 transmits a signal to the master 10 . The slave controller 220 applies a current load from the AC power source to change the waveform, and simultaneously operates the switching driver 212 .

The switching driver 212 operates the first switching element Q1 to charge the DC instantaneous power rectified by the rectifying means 211 into the charging element 213 . Instantaneous power is consumed in the power consuming device 214 while being discharged after rapid charging in the charging device 213 .

Alternatively, as another embodiment, the DC instantaneous power output from the first switching element Q1 may be converted to a level set by the conversion converter 230 and stored in the storage unit 240 and then supplied to the slave controller 220 . .

As described above, the present invention consumes instantaneous power generated during data transmission of the slave 20 or can be used as driving power through a battery or a super capacitor, thereby solving the same problems as in the prior art, and Dimming control was also able to solve the problem of flickering or lighting at low illuminance that occurs when the controller malfunctions.

The embodiments of the present invention described above are merely exemplary, and those of ordinary skill in the art to which the present invention pertains will appreciate that various modifications and equivalent other embodiments are possible therefrom.

10: master 20: slave
30: lighting unit 210: instantaneous power input unit
211: rectifying means 212: switching driver
213: charging element 214: power consuming element
220: slave controller 230: conversion converter
240: storage means 250: main power means
310: module 311: LED light
312: pull-up means 320: isolation switch
330: dimming switching driver 340: dimming converter
DS: dimming signal line CS: control signal line
Q1, Q2:. switching element

Claims (6)

a plurality of slaves 20 for controlling the master 10 for transmitting data and the lighting unit 30 connected according to the data received from the master 10; including,
The lighting unit 30
one or more modules 310 each having an LED light 311;
a dimming converter 340 for outputting a dimming control signal of the LED lighting 311 under the control of the slave 20;
an isolation switch 320 for insulating a dimming signal line (DS) connected from the dimming converter 340 to the module; and
a dimming switching driver 330 that detects the presence or absence of an abnormality in the slave 20 and operates the isolation switch 320; Lighting control system using power line communication comprising a.
The method according to claim 1, The isolation switch (320) is
a photo coupler including a light emitting element connected to the control signal line CS and a light receiving element connected to the dimming signal line DS; Lighting control system using power line communication, characterized in that.
The method according to claim 1, wherein the module (310)
Pull-up means 312 connected to the output side of the LED light to light the LED light 311 at 100% output after the dimming signal line is opened; Lighting control system using power line communication further comprising.
The method according to claim 1, The lighting unit 30
A lighting control system using power line communication further comprising a; dimming switching driver 330 for operating the isolation switch by detecting the presence or absence of a failure of the slave 20.
The method according to claim 1, Slave (20)
a slave controller 220 for transmitting data to the master 10 by applying a current load to the AC power; and
Instantaneous power input unit 210 for receiving and consuming instantaneous power generated when the current load of the slave controller 220; including,
The instantaneous power input unit 210 is
rectifying means 211 for converting AC to DC;
a charging device 213 for charging the instantaneous power output from the rectifying means 211;
a first switching element (Q1) for switching the power line between the output side of the rectifying means (211) and the charging element (213) under the control of the slave controller (220); and
a power consuming device 214 that consumes instantaneous power discharged from the charging device 213; Lighting control system using power line communication comprising a.
The method according to claim 1, Slave (20)
Slave controller 220 for controlling to transmit data to the master 10 by applying a current load to the AC power;
an instantaneous power input unit 210 for rectifying and outputting instantaneous power generated during a current load of the slave controller 220;
a conversion converter 230 for converting the instantaneous power rectified by the instantaneous power input unit 210 to a set level; and
a storage means 240 for storing the instantaneous power output from the conversion converter 230 and supplying it as driving power to the slave 20; Lighting control system using power line communication comprising a.

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