| 摘要 |
PURPOSE: An excavation work monitoring system and a method thereof are provided to output a frequency to a gas pipe by installing a frequency generation device at a remote monitoring system. CONSTITUTION: A wireless communications unit(201) receives a remote control signal from the from outside. A signal conversion unit(202) converts the signal received from a wireless communication unit to a digital signal. A control unit(203) receives the converted digital signal and outputs a power control signal. A frequency conversion unit(204) converts the power control signal to a frequency signal. A power supply unit(205) turns on/off the power corresponding to the frequency signal. |
