Entrained gas has been regarded as disturbance to measurements based on Coriolis meters, since measurement accuracy can be degraded because of this disturbance. Recent research from Endress + Hauser has discovered that different types of gas bubbles, namely free bubbles and suspended bubbles, have various impact on the meter measurement performance. It is important to understand the error mechanism for different effects, namely bubble effect and resonator effect, which are introduced by different bubble types, and to take the corresponding measures to cope with the effects. It is also crucial to identify the bubble pattern in the measuring tube of a Coriolis meter to make a diagnosis and reduce the negative influence of the disturbance accordingly. For free bubbles that typically cause inhomogeneity of a medium, the fluctuation of the resonance frequency of the measuring tube in a Coriolis meter is directly correlated to the existence of this type of bubbles, since this medium under a flowing condition causes density fluctuation to the meter as gas density is typically much lower than that of a liquid. For homogenous suspended bubbles that lead to a significantly increased compressibility of a medium, the innovative Multi-Frequency Technology in Promass Q sensor offers the means to qualitatively detect the existence of this type of bubbles and quantitatively calculate the volume fraction of the gas phase, based on its ability to derive the speed of sound in a medium containing such bubbles. Identification of the type of bubbles helps not only for crediting the measurement reliability, but also for obtaining more detailed medium properties, and in turn a better process insight, with which a process optimization can be enabled to improve the quality of production.

夹带气体被认为是对基于科里奥利流量计的测量的干扰，因为由于这种干扰会降低测量精度。Endress + Hauser的最新研究发现，不同类型的气泡，即自由气泡和悬浮气泡，会对仪表的测量性能产生各种影响。重要的是要了解由不同气泡类型引入的不同效应（即气泡效应和谐振器效应）的误差机理，并采取相应的措施来应对这些效应。识别科里奥利仪表的测量管中的气泡模式以做出诊断并相应减少干扰的负面影响也至关重要。对于通常会导致介质不均匀的自由气泡，科里奥利流量计中测量管共振频率的波动与这种气泡的存在直接相关，因为这种介质在流动条件下会导致流量计的密度波动，因为气体密度通常远低于气体密度。液体。对于导致介质可压缩性显着提高的均匀悬浮气泡，Promass Q传感器中的创新型多频技术提供了定性检测此类气泡的存在并定量计算气相体积分数的方法。它在包含此类气泡的介质中得出声速的能力。识别气泡类型不仅有助于提高测量的可靠性，还有助于获得更详细的介质特性，