核电站中跌落零件冲击信号的时频综合报警方法

Time-Frequency Synthesis and Alarm of Loose Parts Impact Signals in Nuclear Power Plant

在对核电站中跌落零件冲击信号和复杂背景噪声进行时域分析和周围图法功率谱估计的基础上，提出了跌落零件时频综合报警方法。该方法首先将背景噪声带通滤波，然后对信号时域预报警及频域报警确认。实验信号处理表明，本方法能有效排除实际背景复杂噪声干扰，给出准确的跌落零件冲击信号报警，并为国内外研制跌落物监测系统（ＬＰＭＳ）提供了一种新的跌落零件报警实施方案。

Based on time domain analysis and periodogram power spectrum estimation of loose parts impact signals and complicate background noise in nuclear power plant time-frequency alarm method is proposed of loose parts impact signals in nuclear power plant in this paper.This method firstly filters complicated background noise with a band_pass filter,then macks prediction in time domain and affirm alarm in frequency domain.Experimental data process indicates that this method eliminates complicated background noise disturbance efficiently and gives exact loose parts impact signals alarm.This paper Provides a new loose parts impact signals alarm implement method for LPMS(Loose Parts Monitoring System) improvement.