| 摘要 |
PURPOSE:To enable direct measurement of a mass flow rate of a fluid to be measured, by forming a sensor tube in a S shape to generate a Corioli's force acting thereon effectively. CONSTITUTION:A second curved part 25 of one sensor tube 23 vibrates at a fixed amplitude with a natural frequency always applied with a vibrator 31. The sensor tube 23 is so arranged as to be supported with struts 28 and 29 and when the second curved part 25 vibrates, a first curved part 24 extending in opposite direction also vibrates at the same frequency. In other words, for example, as the tip of the curved part 25 moves downward, the S-shaped sensor tube 23 is displaced in a see-saw manner on an inflow port 26, an outflow port 27 and a strut 30 with upward movement of the curved part 24. Then, as a fluid to be measure flows through the vibrating tube 23, a torsion is generated at the curved parts 24 and 25 by a Corioli's force. Thus, mass flow rate of the fluid can be measured by utilizing that an angle of torsion is proportional to the mass flow rate of the fluid passing through the tube 23. |
