Novel GIS equipment partial discharge monitoring sensing device

The utility model discloses a novel GIS equipment partial discharge monitoring sensing device, which is characterized in that weak and transient UHF (Ultra High Frequency) signals are collected and then are subjected to frequency screening by a filter (2), the screened signals are subjected to amplitude amplification by an amplifier (3), the amplified signals are subjected to peak detection by a peak detector (4), the falling time of pulses is prolonged, and the falling time of the pulses is shortened; the detected pulse is input into a D/A conversion circuit (7) controlled by a single chip microcomputer (8) to be compared with a comparator (5) with a comparison initial value, a level signal output by the comparator (5) is expanded to the pulse width identified by the single chip microcomputer (8) through a pulse expanding circuit (6), and phase information and amplitude information in the level are identified through a control program of the single chip microcomputer (8). A partial discharge signal identifie