| 摘要 |
<p>Apparatus for measuring the flow of fluid comprising: vortex producing means for producing vortices in the fluid flow, a vortex detector member mounted to be moved by said vortices, movement detector for detecting movement of said vortex detector member, said movement detector comprising: an interferometer having two reflective surfaces, a first one connected to move with the vortex detector member as it is moved by said vortices and the second one mounted stationarily and, means to detect interferometrically relative movement between said two reflective surfaces.</p> |
