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公开(公告)号：EP0379799B1
公开(公告)日：1993-06-09
申请号：EP89313244.9
申请日：1989-12-18
IPC分类号： G01F1/78
CPC分类号： G01F1/8413 , G01F1/849
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公开(公告)号：EP0379799A1
公开(公告)日：1990-08-01
申请号：EP89313244.9
申请日：1989-12-18
IPC分类号： G01F1/78
CPC分类号： G01F1/8413 , G01F1/849
摘要： A coriolis-type mass flow sensor (10) suitable for aerospace use comprises a turning fork (14) which is immersed in the fluid whose mass flow is to be sensed, such that its vanes extend across (ie perpendicular to) the direction of flow of the fluid. The whole tuning fork is elongated in the direction of flow of the fluid, so that the fluid flows over (and between) the vanes: typically, the fork may be up to 15 cm long in the direction of flow. The vanes are excited to vibrate perpendicularly to the direction of flow of the fluid by several piezoelectric drive devices held under compression in, and distributed symmetrically about the midlength of, the yoke (12) from which the vanes project, while the vibrations are sensed by respective piezoelectric pickup devices within each end of the yoke. The phase difference between the vibrations sensed by the two pickup devices is a function of the mass flow of the fluid. In an alternative form, the sensor has two pairs of vanes symmetrically distributed around the yoke as a kind of double tuning fork, while in another alternative form, the vanes are formed integrally with, and project into, a short section of cylindrical pipe.
摘要翻译： 适用于航空航天应用的科里奥利型质量流量传感器（10）包括一个转动叉（14），其被浸入要被感测质量流的流体中，使得其叶片横过（即垂直于）流动方向 的流体。 整个音叉在流体的流动方向上是细长的，使得流体在叶片之间（和之间）流动：通常，叉可以在流动方向上长达15厘米。 激励叶片被垂直于流体的流动方向振动，该几个压电驱动装置被保持在压缩状态下并围绕叶片突出的轭架（12）的中长度对称地分布，同时振动由 在轭的每个端部内各自的压电拾取装置。 由两个拾取装置感测到的振动之间的相位差是流体的质量流量的函数。 在另一种形式中，传感器具有两对叶片，其对称地分布在轭架周围，作为一种双音叉，而在另一种替代形式中，叶片与一小段圆柱形管道一体地形成并投影到其中。
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