| 摘要 |
The present invention is a fire monitoring system that converts the current frequency of a load from a time domain to a frequency domain so as to accurately detect a load noise and a parallel arc among the arcs generated in the load, such as an electrical wire, therefore easily monitoring the abnormality in the electrical wire caused by the parallel arc. The fire monitoring system is comprised of four components: a load current detection sensor for detecting a variation in a current flowing through an electric wire; an arc characteristic filter unit for removing a high frequency signal of a voltage from a signal output from the load current detection sensor and detecting a frequency signal of the current; a first amplifier for amplifying a signal output from the arc characteristic filter unit; and an arc current determination unit for converting the frequency signal of the current output from the first amplifier, determining whether a current frequency smaller than a reference current frequency of the electric wire occurs in the frequency signal of the current, and generating an abnormal signal. [Reference numerals] (100) Monitoring server; (110) Indoor detection unit; (120) Abnormal signal detection unit; (201) First monitoring area; (202) Second monitoring area; (203) Third monitoring area; (204) n-th monitoring area; (210) First load monitoring area; (220) Second load monitoring area; (230) Third load monitoring area; (240) n-th load monitoring area; (300) Electricity distribution unit; (310) First power line detection unit; (320) Second power line detection unit; (330) Third power line detection unit; (340) n-th power line detection unit; (AA,CC,EE,GG) Smoke/heat/gas detection unit; (BB,DD,HH) Image detection unit; (FF) Detection unit |
