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【答案】应助回帖
感谢参与，应助指数 +1
Accession number: 20141317512601
Title: Study on the detection of the water content in oil based on the envelope spectrum of HHT
Authors: Chen, Bin1 Email author hustchb@163.com; Liu, Ge1 Email author lycy9945@163.com
Author affiliation: 1 Engineering Research Centre for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing 400067, China
Corresponding author: Liu, G. (lycy9945@163.com)
Source title: Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument
Abbreviated source title: Yi Qi Yi Biao Xue Bao
Volume: 35
Issue: 2
Issue date: February 2014
Publication year: 2014
Pages: 337-342
Language: Chinese
ISSN: 02543087
CODEN: YYXUDY
Document type: Journal article (JA)
Publisher: Science Press
Abstract: In order to accurately detect the water content in oil, a new detection approach based on Hilbert-Huang transform (HHT) envelope spectrum is presented. Firstly, according to the characteristic that the pressure resonance signal of the oil containing water is an amplitude-modulation signal, the expression of the pressure resonance signal is established; and the empirical mode decomposition (EMD) is performed to obtain the intrinsic mode functions (IMFs) of the signal. Then, the IMFs having strong correlation with the original signal are analyzed using the Hilbert transform envelope spectrum demodulation, and the accurate demodulation signal that contains the characteristic information of water content in oil is obtained. The experiment results show that as the water content in oil increases, the order of the pressure resonance frequency decreases gradually, there is a corresponding relation between the resonance frequency of the oil with different water contents and the water content in oil. This method can effectively achieve the water content detection in oil, and provides a theoretical support for the safe operation of oil system.
Number of references: 18
Main heading: Signal detection
Controlled terms: Demodulation - Error detection - Natural frequencies - Water content
Uncontrolled terms: Corresponding relations - Different water contents - Empirical Mode Decomposition - Envelope spectra - Hilbert Huang transforms - Intrinsic Mode functions - Resonance frequencies - Strong correlation
Classification code: 444 Water Resources - 711.1 Electromagnetic Waves in Different Media - 716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
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