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41 results about "Counting rule" patented technology

Time domain reconstruction-based local discharging pulse counting method

The invention discloses a time domain reconstruction-based local discharging pulse counting method. The method comprises the steps of synchronously acquiring transient earth voltage local discharging pulse signals in a multi-channel way through a data acquisition card by a transient earth voltage sensor; performing time domain reconstruction processing on the acquired transient earth voltage local discharging pulse signals according to a power frequency phase period to obtain a continuous time domain local discharging pulse signal waveform having counting characteristic; selecting windowing length with fixed time frame, performing signal extraction by synchronous time domain windowing, recording a pulse peak in each window, and taking an average value, wherein the acquired pulse peak is larger than a set local discharging detection threshold; and outputting average pulse amplitude and corresponding phase information, generating an average discharging quantity oscillograph, and performing calculation to obtain accumulated discharging quantity and discharging energy. The method is widely applied to distributed monitoring of local discharging of various types of power equipment, the noise influence can be effectively removed, the counting rule of local discharging monitoring is highlighted, and the monitoring accuracy is effectively improved.
Owner:SHANGHAI JINYI INSPECTION TECH

Lighting prevention device and method for counting number of lightning strokes on lighting prevention device

The invention provides a lighting prevention device and a method for counting the number of lightning strokes on a lighting prevention device. The lighting prevention device comprises a lighting prevention component, a lightning stroke counting module and a network management server. The lighting prevention component is used for preventing external devices (such as network devices) connected with the lighting prevention device from damage caused by the lighting strokes. The lightning stroke counting module is connected with the lighting prevention component, measures voltage values of the lighting prevention component subjected to the lighting strokes or surges, adds up the number of voltage surge according to the voltage values of the lighting prevention component subjected to the lighting strokes or surges and a preset counting rule, and transmits an alarm signal to the network management server when the stored sum of the voltage surge is larger than the preset threshold value. The network management server can represent the alarm signal and transmit the alarm signal to device maintenance personnel, and then, the device maintenance personnel can maintain and replace the component in the lighting prevention device.
Owner:HUNAN HUAKUANTONG ELECTRONICS TECH
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