The System of Fire Check and Alarm about Low Voltage Distribution Box
Zenghuan Liu, Hui-xian Fan, Jia Guo · 2008
In view of the Electrical Safety demand, carries on using the monolithic integrated circuit to the power source condition examines and judges and carries on the corresponding control, has realized the double power source power supply automatic cut over. The chaotic oscillator detection method uses the bifurcation behavior of the duffing oscillator to detect the signals. There are weak signals before arcing fault, which signals are annihilated by strong noise. When the signal is added to duffing oscillator signal detection as periodic disturbed force, if the system is on state of interim chaos, which proves there is arcing sound, then arcing sound is acted as early warning. Arcing sound, arcing light and current happen simultaneously. The monitor system sends out warning signals of arcing fault. The system fulfills on2line detection for arcing fault, and early warning is established by arcing sound , arcing light and short2circuit current. The system is proved by experiment to be of high accuracy and high speed.