| 基于多小波相邻系数法的热式油水两相流相含率测量 |
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| 引用本文： | 张春晓,张涛. 基于多小波相邻系数法的热式油水两相流相含率测量[J]. 化工学报, 2009, 60(2): 325-331 |
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| 作者姓名： | 张春晓 张涛 |
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| 作者单位： | 天津市过程检测与控制重点实验室,天津大学电气与自动化工程学院,天津,300072;天津市过程检测与控制重点实验室,天津大学电气与自动化工程学院,天津,300072 |
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| 基金项目： | 国家高技术研究发展计划项目(2007AA04Z180)~~ |
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| 摘 要： | 油水两相流温度信号受到外界噪声干扰，导致油水特性难以辨别，含油率测量范围小。为解决这一问题，采用一种新的信号处理方法——多小波相邻系数法，与多小波传统阈值、向量阈值去噪算法相比，较好地解决了变换系数之间的相关性，去噪效果较好。通过大量的油水实验数据处理发现：利用热电偶测温信号的电压幅值波动测含油率，测量范围为3%～70%，通过曲线拟合，得到热电偶电压幅值波动与含油率的数学表达式，测量误差为7.1%。
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| 关 键 词： | 油水两相流 去噪 热电偶 多小波 相邻系数 含油率 |
| 收稿时间： | 2008-07-25 |
| 修稿时间： | 2008-11-19 |
Measurement of phase holdups of heat method oil/water two-phase flow based on multiwavelet neighboring coefficient method |
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| ZHANG Chunxiao,ZHANG Tao. Measurement of phase holdups of heat method oil/water two-phase flow based on multiwavelet neighboring coefficient method[J]. Journal of Chemical Industry and Engineering(China), 2009, 60(2): 325-331 |
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| Authors: | ZHANG Chunxiao ZHANG Tao |
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| Affiliation: | Tianjin Key Laboratory of Process Measurement and Control;School of Electrical Engineering and Automation;Tianjin University;Tianjin 300072;China |
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| Abstract: | The temperature signal of oil/water two-phase flow is disturbed by noises from external interference which results in difficulty in distinguishing performance of oil/water and a small measuring range for oil holdup.In order to solve the problem,a new signal processing method based on the multiwavelet neighboring coefficient method was used.Compared with traditional threshold de-noising based on multiwavelet and vector threshold de-noising,the neighboring coefficient method can deal with the correlativity am... |
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| Keywords: | oil/water two-phase flow de-noising thermocouple multiwavelet neighboring coefficient oil holdup |
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