KR20140036848A - System for powerline communications using ac one line - Google Patents

Abstract

The present invention relates to a system for power line communication using an AC one line as a communication line, and more particularly, to a system for power line communication using an AC one line, which can control each separate light by respectively setting an address for each separate light, can transmit a communication signal and power through the AC one line, can connect sensors and enable interactive communication by securing communication speed up to kbps unit speed, and can realize synchronous communication and asynchronous communication using zerocross. A power unit, a zerocross detector (11), a control microcomputer (12), a control input (13), an FET switch (14) are configured inside a transmitting unit (10). A power unit, a zerocross detector (21), a control microcomputer (22), a comparator (23), an LED driver (24) are configured inside a receiving unit (20). Various bits of data signals are transmitted in a half cycle of a power frequency by passing an AC voltage when not transmitting data signals and enabling the FET switch (14) to enable face cut in a predetermined section in a desired phase when transmitting data signals. When receiving the data signals, the system uses a synchronous receiving method of recognizing a detected signal on the basis of zerocross using the comparator (23), receiving an input of a signal, and processing the signal, and an asynchronous receiving method of using zerocross only when applying initial standards and receiving and, after that, processing a signal in an asynchronous serial communication method, through similar to the synchronous receiving method. [Reference numerals] (13) Control input; (14) FET switch unit; (21,11) Power unit, Zero cross detection unit; (22,12) Control MICOM; (23) Comparator; (24) LED driver; (AA) Line input; (BB) Signal

Description

Power line communication system using AC disconnection line {System for powerline communications using AC One line}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power line communication system that can use a power line as a communication line, and more particularly, to a high speed power line communication system that can use all power lines, including power lines that have been previously wired. It is about.

With the rapid development of the IT and information and communication fields in modern times, many communication methods using power lines already established in homes, businesses, factories, and social overhead systems have been developed. The communication method using the power line is a communication technology using the existing power line without using a telephone line or UTP cable. Next-generation ultra-high speed that can use voice, data, and the Internet at high speed by connecting a power cable to a power socket of a home or a corporate office. It is a system that connects all information devices of home and business such as TV, refrigerator, air-conditioning telephone, computer etc. as information communication subscriber network service. In other words, all the electronic and electrical appliances that require power can make communication possible with one power line. If power line technology becomes popular, data transmission paths, which have been complicated and diversified by cable television, telephone lines and optical communication networks, will be integrated into a single power line. Therefore, it is possible to use the communication more easily with a simple structure away from the complicated wiring, and it is not necessary to install a new power line or communication line because only a separate external device such as a modem or a system that distributes power and communication data to an existing power line is required. The cost of building the track can be reduced. In addition to the Internet service and network construction, remote control of power line-based intelligent home appliances, remote meter reading such as meters, and remote control of various electronic and electrical appliances can be made, thereby enabling a much more convenient life.

However, if the existing power line communication method is applied in applications requiring simple control, for example, fluorescent lamp illumination control and home appliance power on and off, the market competitiveness cannot be secured because expensive installation cost and high technology are required. Therefore, it is urgent to develop a simple one-way communication technology suitable for simple control to secure the simplicity of installation and secure a low cost competitiveness.

As a prior art related to a communication system using a power line, for example, Korean Patent Publication No. 10-0446188 does not affect the basic characteristics of the device at all, does not generate noise, and affects the power of other devices. It is intended to transmit and receive data using power lines composed of closed circuits without using special data transmission lines. Closed-circuit power line data communication using phase control in the low voltage part immediately after zero cross which enables data communication with an inexpensive and simple circuit configuration for industrial equipment such as control of an air conditioner outdoor unit is disclosed. However, the prior art described above can control the AC phase transmitted using the triac circuit only after zero cross, so the communication is possible only at a speed of 120 BPS or less, so that the speed is slow in the part requiring a lot of control. There is a problem that is difficult to use, and in addition, in Korean Patent Publication No. 10-1009580, a unidirectional power line communication device using an AC commercial power line that enables one-way communication by installing a half-wave rectifier on one of AC commercial power lines. Although the prior art described above is simple to recognize a signal by sending an AC power wave or half-wave and detecting it for a predetermined time, it is fast because it generates a half-wave signal when the switch is pressed for a period of time. Communication is not possible and protocols cannot be none. Therefore, although it is possible to control several devices at the same time, it is difficult to drive electronic and electric appliances having multiple addresses on the same line.

In order to solve the above problems, the present invention has a built-in FET switching element to supply power by passing an AC voltage when not transmitting a signal, and to allow a face cut at a desired phase for a certain phase only when transmitting a power supply frequency. This completes a power line communication system using AC One line that can transmit several bits of data signal in half cycle.

An object of the present invention is to provide a power line communication system using an AC One line that can simultaneously transmit power of several bits of data signal to a single power line at high speed, and more specifically, to a system. The built-in FET switching element allows the AC voltage to pass through when no data signal is transmitted through the power line, and enables face-cutting for a certain period in the desired phase only when transmitting the data signal. It is an object of the present invention to provide a power line communication system using an AC disconnection line capable of transmitting data.

As a solution for achieving the above object will be described taking a system consisting of a transmitter 10 and a receiver 20 as an example.

The power line communication system using the AC disconnection line of the present invention includes a power supply unit, a zero cross detection unit 11, a control micom 12, a control input 13, and a FET switch unit 14 in the transmission unit 10. And a power supply unit, a zero cross detection unit 21, a control micom 22, a comparator 23, and an LED driver 24 inside the receiver 20.

According to the operation of the present invention, when no signal is transmitted, an AC voltage is passed, and when transmitting a signal, the FET switch unit enables a face cut at a desired phase for a certain period, thereby transmitting a data signal of several bits in a half cycle of the power frequency. When receiving the data signal, the synchronous receiving method for receiving and processing the signal input by recognizing the signal detected later based on the zero cross point using a comparator,

The receiver receives a normal sinusoidal waveform at the front of the final dimming output and receives it as an AC voltage output with an additional header.In the initial stage, the receiver recognizes the data signal based on the zero-cross input. Since the zero cross input is ignored, the comparator performs an asynchronous receiving method that recognizes and processes the signal by checking when the event of the signal, which outputs only a signal having a level higher than the comparison level, is compared with the comparison level.

According to the power line communication system using the AC disconnection line according to the present invention, it is possible to use data communication using the existing power line, not only can be used in the existing building as well as the existing building without additional wiring changes, The dimming system can be implemented at a significantly lower cost than the existing high cost, which can be very helpful for saving energy and reducing costs.

In addition, simple bi-directional communication enables data signals to be transmitted and received with various lighting control systems, various sensor control systems, home appliance control systems, LED bulbs, LED converters, ballasts for fluorescent lamps, and various applications. It can be applied to various applications that take advantage of power line communication.

1 is an overall connection diagram of a power line communication system using the AC disconnection line of the present invention.
2 is an enlarged view of a transmitter of a power line communication system using an AC disconnection line of the present invention and a graph of a transmitter of synchronous communication.
3 is an enlarged view illustrating a receiver of a power line communication system using an AC disconnection line of the present invention and a receiver graph of synchronous communication.
Figure 4 is a graph of the transmission unit of the asynchronous communication of the power line communication system using the AC disconnection line of the present invention.
5 is a graph of a receiver of asynchronous communication of a power line communication system using an AC disconnection line according to the present invention.
6 is a table showing the event time and the data signal of the asynchronous communication receiver of the power line communication system using the AC disconnection line of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

1 is an overall connection diagram of a power line communication system using an AC disconnection line of the present invention, FIG. 2 is an enlarged view of a transmitter and a transmitter graph of synchronous communication, and FIG. 4 is a graph of a transmitter of asynchronous communication, FIG. 5 is a graph of a receiver of asynchronous communication, and FIG. 6 is a table showing event time and data signals of a receiver of asynchronous communication.

FIG. 1 is an overall connection diagram. As shown in FIG. 1, a power line is a line input to a transmitter 10 so that a power supply unit, a zero cross detector 11, a control micom 12, and a control input 13 in the transmitter 10. ), The FET switch unit 14 is connected to the receiving unit 20, and the receiving unit 20 has a power supply unit, a zero cross detection unit 21, a control micom 22, a comparator 23, and an LED inside. The driver 24 is provided.

2 is an enlarged view of the transmitter and a graph of the transmitter in synchronous communication. As shown in FIG. 2, the transmitter 10 includes a power supply unit, a zero cross detector 11, a control micom 12, and a control input 13. And the FET switch section 14.

First, when an AC voltage is input to the transmitter 10 through a power line, a sine wave 101 which is a frequency waveform of a typical AC voltage is formed. At this time, the moment when the sine wave 101, which is a frequency waveform, passes O [V] appears every cycle. This point is called a zero cross point 102. The zero cross point 102 is detected by a power supply unit and a zero cross detector. In (11), the signal is generated at each of the zero cross point 102 in the power supply unit and the zero cross detection unit 11 as described above, and can be confirmed at the zero cross point 102.

When the FET switch unit 14 does not transmit the data signal to the power line, the FET switch 14 functions to pass the AC voltage as it is. However, when transmitting the data signal to the power line, the face signal can be transmitted at a predetermined phase in a desired phase to transmit the data signal. have. In the data signal graph 103 of FIG. 2, for example, two bits are transmitted during the half period of the sine wave 101 of the AC voltage. In the data signal graph 103, when there is no signal, "0" is displayed and when there is a signal, "1". In addition, when the signal is loaded on the sine wave 101 of the AC voltage and transmitted, the middle portion of the sine wave 101 is cut and transmitted. In this case, the speed of the data signal is 120 bps to several kbps.

In the control microcomputer 12 and the control input 13, a signal is loaded on the sine wave 101 of the AC voltage and output to the dimming output 104. As shown in the dimming output 104, the data on the AC voltage sine wave 101 is displayed. The signal portion of the signal graph 103 is output in the form of cutting.

3 is an enlarged view of a receiver and a receiver graph of synchronous communication. As shown in FIG. 3, the receiver 20 includes a power supply unit, a zero cross detector 21, a control microcomputer 22, a comparator 23, and an LED driver. It consists of 24.

The receiver 20 demodulates the data signal transmitted from the transmitter 10, and may demodulate the data signal using the comparator 23. The dimming output 104 and the reference DC voltage are input to the comparator 23, and the reference DC voltage and the dimming output 104 are compared to output a signal having a level lower than the reference DC voltage. That is, as shown by the comparator input 108, outputting a signal lower than the reference DC voltage results in the same result as the comparator output 109. At this time, the zero cross point 102 is not controlled as a signal. In the program algorithm). Therefore, when the comparator output 109 is processed based on the zero cross point 102, it is possible to demodulate the same data signal as the data signal graph 103 transmitted from the transmitter 10 shown in FIG. In addition, the dimming output 104 may receive a signal from the comparator 23 and may process the output level change or the output pulse width modulation (PWM) change in the control microcomputer 22.

In addition, it is possible to convert each individual receiver 20 to a brightness desired by the user based on the received data signal by incorporating a receiver circuit and a signal processor in each individual receiver 20. In addition, since the switching input is normally received only when receiving a full AC voltage while receiving a full AC voltage, it is resistant to noise, and in the case of the conventional general transmission unit, the power factor is lowered because the AC voltage face cut is performed. However, the present invention does not affect the power factor of the device itself.

4 is a graph of a transmission unit for asynchronous communication. Referring to FIGS. 2 and 4, a signal is loaded on an AC voltage sine wave 101 based on a zero cross point 102. At this time, the data signal graph 203 is a FET input signal for switching the AC voltage output in the transmitter 10 and the final dimming output 204 is cut off by the signal of the data signal graph 203 to the AC voltage sine wave 101. Will be output as

5 is a graph of a receiver of asynchronous communication. Referring to FIGS. 3 to 5, a sinusoidal waveform of one period is added to the front of the final dimming output 204 of FIG. A header is added to the AC voltage output 206. When the receiver 20 first recognizes the data signal based on the zero cross point 102 and receives the header of the front part, the receiver 20 ignores the input of the zero cross point 102 and then inputs an AC voltage. As shown in the graph 208, the comparator 23 crosses the comparison level and outputs only the signal having a level higher than the comparison level, and checks the time point at which the event of the signal is changed to recognize the signal and confirms it in the output graph 209. Can be.

More specifically, referring to the table showing the event time and the data signal of the asynchronous communication receiver of FIG. 6, the time t1, the time until each event is changed is recognized by recognizing the A, B, and C times representing each event. Check t2 and t3 to recognize 2 bits each time an event occurs. As a result, the result shown in the data signal graph 203 of FIG. 4 can be obtained.

According to the power line communication system using the AC disconnection line of the present invention, in the case of the two-way communication between the dimmer, which is the transmitter 10, and the illuminance sensor / motion sensor, which is the receiver 20, the dimmer serves as a master, and the illuminance sensor The motion sensor acts as a slave to enable serial communication, and it can receive and process acknowledgment signals by assigning addresses to the devices. That is, when the dimmer transmits a signal for requesting the current state to the illuminance sensor / motion detection sensor, the illuminance sensor / motion detection sensor transmits the output back to the dimmer.

The present invention described above is not limited to the above detailed description, and various modifications may be made by those skilled in the art without departing from the gist of the present invention.

10. Transmitter
11. Power supply unit, zero cross detection unit
12. Control Microcomputer
13. Control input
14. FET switch unit
20. Receiver
21. Power supply unit, zero cross detection unit
22. Control Microcomputer
23. Comparator Letter
24. LED Driver
101. Sine Wave
102. Zero cross point
103. Data Signal Graph
104. Dimming output
108. Compassletter input
109. Comparator Output
203. Data signal graph
204. Dimming output
206. AC voltage output
208. AC voltage input
209. Output graph

Claims (6)

In a power line communication system using an AC disconnection line,
A transmission unit 10 including a power supply unit, a zero cross detection unit 11, a control micom 12, a control input 13, and a FET switch unit 14;
A receiving unit 20 including a power supply unit, a zero cross detection unit 21, a control micom 22, a comparator 23, and an LED driver 24;
The transmitter 10 and the receiver 20 is a power line communication system using an AC disconnection line, characterized in that connected by one power line. The FET switch unit 14 of the transmitter 10 allows an AC voltage to pass when the data signal is not transmitted, and allows a face cut at a desired phase for a predetermined period only when the data signal is transmitted. A power line communication system using an AC disconnection line, characterized in that the synchronous transmission method using a zero cross to transmit a data signal of several bits. The method of claim 2, wherein when receiving a data signal, the comparator 23 is used to process the transmitted data signal, and the signal detected thereafter based on the zero cross is detected and the signal input is received and processed. Power line communication system using an AC disconnection line, characterized in that the synchronous reception method that does not affect the power factor (力 率) by operating with an AC voltage. The FET switch unit 14 of the transmitter 10 allows an AC voltage to pass when the data signal is not transmitted, and allows a face cut at a desired phase for a predetermined period only when the data signal is transmitted. A power line communication system using an AC disconnection line, characterized in that the asynchronous transmission method using a zero cross to transmit a data signal of several bits (bit). The method according to claim 4, when receiving a data signal, using a comparator 23 for the processing of the transmitted data signal, recognizes the detected signal to receive and process the signal input, but only zero cross when applying the initial reference After that, the signal is received and processed by the asynchronous serial communication method, and the power line communication using the AC disconnection line is characterized by an asynchronous reception method that does not affect the power factor by operating with a full AC voltage. system. The AC disconnection line according to any one of claims 1 to 5, which is applied to a lighting control system, various sensor control systems, home appliance control systems, LED bulbs, LED converters, ballasts for fluorescent lamps, and various applications. Power line communication system using.

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