Straight tube type Coriolis flowmeter for tertiary mode vibration with elastic connection member and pedestal

摘要

A straight tube type Coriolis flowmeter is equipped with a straight-tube-type flow tube, a drive device for driving by a tertiary mode vibration, a pair of detection unit for detecting a phase difference proportional to a Coriolis force, a pedestal having rigidity, and elastic connection members having elasticity. Assuming that an axial direction of the flow tube is a Z-axis, that a driving direction of the drive device is an X-axis, and that a direction orthogonal to the Z-axis and the X-axis is a Y-axis, the elastic connection members are of a structure exhibiting lower rigidity in the Z-axis direction than in the X-axis direction and the Y-axis direction, and exhibiting lower rigidity in a direction of rotation around the Y-axis than in a direction of rotation around the Z-axis and a direction of rotation around the X-axis.