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相关流速测量技术正在迅速地发展,它为两相或多相流体流动的测量提供了一种有力的工具。应用超声传感器的相关测量系统有许多显著优点。因而特别适用于工业应用。它没有可动部件,对流动无接触,可在原有工艺管道上安装“夹钳”式传感器。本文作者提出了一种简单的脉冲超声互相关流动测量系统,本系统是基于如下原理工作的:超声波穿越流动的两相流体时被流体进行了随机幅值调制。这一新的系统完全消除了连续式超声波会出现的“驻波”干扰,这种干扰导致互相关流动测量系统的性能恶化。作者还在文中给出了利用脉冲超声系统同时测定液相流速及气相流速的原始实验数据和结果。
Related flow rate measurement techniques are rapidly evolving, providing a powerful tool for measuring the flow of two-phase or multi-phase fluids. There are a number of significant advantages associated with measuring systems using ultrasonic sensors. It is especially suitable for industrial applications. It has no moving parts, no contact with the flow, the pipeline can be installed in the original “clamp” sensor. The authors propose a simple pulse ultrasound cross-correlation flow measurement system, the system is based on the following principles: ultrasonic flow through the two-phase fluid fluid was random amplitude modulation. This new system completely eliminates the “standing wave” interference that can occur with continuous ultrasound, which causes the performance of the cross-correlation flow measurement system to deteriorate. The author also presents the original experimental data and results of simultaneous determination of liquid phase velocity and gas phase velocity using pulsed ultrasonic system.