Patent ID: 7694585
Filing Date: 2010-04-13
Classification: G01F

Abstract:
1. A straight tube type Coriolis flowmeter for tertiary mode vibration with an elastic connection member and a pedestal, comprising: a straight-tube-type flow tube through which a fluid to be measured flows; a drive device for driving the flow tube by a tertiary mode vibration; a pair of detection means for detecting a phase difference proportional to a Coriolis force acting on the flow tube; a rigid pedestal situated on the outer side of the flow tube while keeping coils of the drive device and of the pair of detection means fixed in position; and a pair of elastic connection members connecting the pedestal to the flow tube at two predetermined positions of the flow tube, wherein, assuming that 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 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.