A method for weak impact signal discrimination based on para-approximate entropy

被引：4

作者：

Cao, Yanlong ^{[1
]}

He, Yuanfeng ^{[1
]}

Yang, Jiangxin ^{[1
]}

Gan, Chunbiao ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Adv Mfg Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

PROGRESS IN NUCLEAR ENERGY | 2012年 / 60卷

关键词：

LPMS; Teager energy operator; AR model; P-ApEn; Impact signal; MONITORING-SYSTEM; LOOSE; NOISE;

D O I：

10.1016/j.pnucene.2012.05.004

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Impact signal of the loose part in a nuclear power plant provides vital information about its mass and location. Hence detection of the impact signal is of great significance. In a practical NPP working environment, some weak impact signals may submerge in background noises. A signal detection and impact signal discrimination method is proposed in this paper. Teager energy operator is used to process a whitened signal using auto-regression model. It increases the signal to noise ratio (SNR) and makes the impact signal detection easy. Para-approximate entropy method is proposed to process the energy envelop for discriminating the loose part impact signal from other interferences. Simulated experiment has been carried out to verify the proposed method. Data analysis proves that it is capable to detect and discriminate a weak impact signal with low SNR. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：53 / 60

页数：8

共 15 条

[1] KUES '95 - The modern diagnostic system for loose parts monitoring [J].

Bechtold, B ;

Kunze, U .

PROGRESS IN NUCLEAR ENERGY, 1999, 34 (03) :221-230

[2]

[方力先 Fang Lixian], 2004, [原子能科学技术, Atomic Energy Science and Technology], V38, P432

[3] Modern methods of signal processing in the loose part monitoring system [J].

Figedy, S ;

Oksa, G .

PROGRESS IN NUCLEAR ENERGY, 2005, 46 (3-4) :253-267

[4] Teager energy based feature parameters for speech recognition in car noise [J].

Jabloun, F ;

Çetin, AE ;

Erzin, E .

IEEE SIGNAL PROCESSING LETTERS, 1999, 6 (10) :259-261

[5]

KAISER JF, 1990, P IEEE INT C AC SPEE

[6]

[雷雄国 LEI Xiongguo], 2007, [声学技术, Technical Acoustics], V26, P121

[7]

Mao H.L., 1998, NUCL POWER ENG, V19, P265

[8] LOOSE PART MONITORING-SYSTEM IMPROVEMENTS [J].

MAYO, CW ;

SHUGARS, HG .

PROGRESS IN NUCLEAR ENERGY, 1988, 21 :505-513

[9] ADVANCED BURST PROCESSING METHODS IN LOOSE PARTS MONITORING [J].

OLMA, BJ ;

SCHUTZ, B .

PROGRESS IN NUCLEAR ENERGY, 1988, 21 :525-535

[10] Impact source localization on an elastic plate in a noisy environment [J].

Park, Jin-Ho ;

Kim, Yang-Hann .

MEASUREMENT SCIENCE AND TECHNOLOGY, 2006, 17 (10) :2757-2766

← 1 2 →