| 摘要 |
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 |
