Patent ID: 6722209
Filing Date: 2004-04-20
Classification: G01F

Abstract:
A Coriolis force type flow meter utilizing a Fabry-Perot interferometer, comprising:a substrate, which has a stimulating electrode for providing an electrostatic force and two small holes symmetrically formed on opposite sides of the stimulating electrode; a symmetric loop tube, which is mounted on the substrate, the back end of which having an opening for a fluid to enter and leave, the front end of which being installed on the stimulating electrode and having a plurality of through hole at the position corresponding to each of the small holes; wherein the electrostatic force provided by the stimulating electrode drives the loop tube into bending vibrations; a plurality of reflective mirrors installed inside the small holes of the substrate and the through holes of the loop tube; a plurality of light sources installed above the through holes; and a plurality of photo probes installed under the small holes of the substrate; wherein each of the photo probes extracts interfered optical signals coming from the associated light source and passing through the reflective mirrors in the corresponding small hole and through hole, and the optical signals are used to compute the flux of the fluid flowing through the symmetric loop tube.