| 摘要 |
PURPOSE:To simplify the structure, by providing a vibrating piece which is vibrated by the flow of fluid in an oscillating chamber, measuring the period of said vibrating piece, and measuring the flow rate of the fluid. CONSTITUTION:A case main body 1 is constituted by a base 2 and a cover 3. An oscillating chamber 4 comprising a concave part is provided in the base 2. An input port 5 is provided at one end of the chamber and an output port 6 is provided at the other end. A supporting shaft 7 is protruded at the central part of said oscillating chamber 4 so that it is freely rotated. The vibrating piece 8 which is rotated with the shaft as a unitary body is attached to said supporting shaft 7. A turn-back part 9 comprising a crescent shaped protruded part is provided so that its arc shaped concave surface 9a faces the input port 5. A sensor 12 is provided in the vicinity of the input port 5 at the inner bottom surface or the inner upper surface of the oscillating chamber 4. |
