Acta Metrologica Sinica  2023, Vol. 44 Issue (12): 1819-1826    DOI: 10.3969/j.issn.1000-1158.2023.12.06
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Two-Phase Flow Pattern Identification Based on Choi-Williams Analysis and Neural Network
ZHANG Li-feng,ZHANG Si-jia,LIU Shuai
Department of Automation, North China Electric Power University, Baoding, Hebei 071003, China
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Abstract  A flow pattern recognition method based on Choi-Williams analysis and neural network is proposed. The array conductivity sensor is used to obtain the flow pattern information of gas-liquid two-phase flow in vertical rising pipeline, and the multivariate measurement data are denoised and dimensionally reduced. Further, Choi-Williams analysis is used to convert it into time-frequency spectrogram, and the data set is constructed. CNN, VGG-16 and ResNet-18 network models are built respectively, and the time-frequency spectrograms of different flow patterns are used as network input for training and testing. The recognition results show that Choi-Williams analysis can effectively extract the characteristics of different flow pattern signals, and the three networks have high recognition accuracy, among which ResNet-18 network has the highest accuracy, with an average flow pattern recognition rate of 99.4%.
Key wordsmetrology      flow pattern identification      Choi-Williams analysis      neural network      array conductivity sensor;gas-liquid two-phase flow     
Received: 08 May 2022      Published: 27 December 2023
PACS:  TB937  
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ZHANG Li-feng
ZHANG Si-jia
LIU Shuai
Cite this article:   
ZHANG Li-feng,ZHANG Si-jia,LIU Shuai. Two-Phase Flow Pattern Identification Based on Choi-Williams Analysis and Neural Network[J]. Acta Metrologica Sinica, 2023, 44(12): 1819-1826.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2023.12.06     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2023/V44/I12/1819
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