Measurement of phase holdups of heat method oil/water two-phase flowbased on multiwavelet neighboring coefficient method

ZHANG Chunxiao; ZHANG Tao

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Measurement of phase holdups of heat method oil/water two-phase flowbased on multiwavelet neighboring coefficient method

更新时间：2025-12-10

- Measurement of phase holdups of heat method oil/water two-phase flowbased on multiwavelet neighboring coefficient method
- CIESC Journal Issue 2, Pages: 325-331(2009)
- 作者机构：
  
  1. 天津市过程检测与控制重点实验室
  2. 天津大学电气与自动化工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 February 2009，
  
  Published：05 February 2009
- 稿件说明：
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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]. CIESC Journal, 2009, (2): 325-331.
DOI：

ZHANG Chunxiao, ZHANG Tao. Measurement of phase holdups of heat method oil/water two-phase flowbased on multiwavelet neighboring coefficient method[J]. CIESC Journal, 2009, (2): 325-331. DOI：

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%。

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 among the transformation coefficients and ensure better de-noising effect.Processing of a large amount of experiment data of oil/water have revealed that measurement of oil holdup based on voltage amplitude transform of thermocouple gave a measuring range of 3%—70% oil holdup.The mathematical expression between voltage ampitude fluctuation and oil holdup was obtained

and the measurement error of oil holdup was 7.1%.

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