| 摘要 |
An acceleration-proof vortex-type flowmeter in which fluid to be measured is conducted through a flow tube having an obstacle assembly mounted therein capable of generating periodic vortices, causing a deflectable tail section of the assembly to vibrate at a corresponding rate. The vibrations are externally sensed to produce an output signal whose frequency is proportional to the fluid flow rate. The tail section is cantilevered by a flexible beam from a fixed section mounted across the flow tube, the vibrations of the tail section being transmitted to an external coupling head by a rod extending though the beam and connected at an immediate junction of a bar disposed within a longitudinal bore in the fixed section. The upper end of the bar is pivotally supported by a diaphragm covering the bore and is linked to the coupling head which is engageable by a force sensor. The distribution of mass in the bar is such as to define below the intermediate junction a balancing mass acting to render the sensing system substantially insensitive to acceleration forces.
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