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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >High resolution processing techniques for ultrasound Doppler velocimetry in the presence of colored noise. II. Multiplephase pipe-flow velocity measurement
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High resolution processing techniques for ultrasound Doppler velocimetry in the presence of colored noise. II. Multiplephase pipe-flow velocity measurement

机译：在有色噪声的情况下，用于超声多普勒测速的高分辨率处理技术。二。多相管流速测量

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For pt.I see ibid., vol.50, no.3, p.267-78 (2003). This paper presents an application of continuous wave ultrasound Doppler velocity measurements to two-phase flow in pipes. In many petroleum wells, the multiphase flow is separated into two phases: the first is a liquid phase and the second is a gas phase with small scatterers. The problem of multiphase velocity profile measurements has not been satisfactorily solved by classical approaches due to the multiphase nature of the fluid and the presence of colored noise, which introduces a significant bias in classical frequency estimators. We propose the use of resolution frequency techniques to overcome the classical limitations. Direct estimation of Doppler frequency then obtained using either time frequency maximum frequency or arguments of poles of the parametric model that identifies the Doppler part of the signal is discussed. The tests made with synthetic Doppler signals and two-phase flow have demonstrated the excellent performance of the high resolution techniques based on reassignment and parametric techniques.
机译：关于第一部分，见同上，第50卷，第3期，第267-78页（2003年）。本文介绍了连续波超声多普勒速度测量在管道两相流中的应用。在许多石油井中，多相流被分为两相：第一相是液相，第二相是具有小散射体的气相。由于流体的多相性质和色噪声的存在，经典方法未能令人满意地解决多相速度剖面测量问题，这在经典频率估计器中引入了显着的偏差。我们建议使用分辨率频率技术来克服经典的局限性。然后讨论了使用时频最大频率或用于识别信号多普勒部分的参数模型的极点参数直接获得的多普勒频率估计。使用合成多普勒信号和两相流进行的测试已经证明了基于重新分配和参数技术的高分辨率技术的出色性能。

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