Patent ID: 11971284
Assignee: STMICROELECTRONICS S.R.L.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A system for measuring a property of a fluid, comprising:
a Coriolis-force-based flow sensing device that includes:
a substrate;
an insulating layer on a surface of the substrate;
at least one driving electrode on the insulating layer,
a structural body partially overlapping the driving electrode, the structural body having a buried channel, the buried channel having a first side and a second side opposite to the first side, the first side of the buried channel being closer to the substrate than the second side of the buried channel, the driving electrode and the structural body being coupled together, the structural body forming a chamber between the buried channel and the substrate, the driving electrode being in the chamber;
a porous layer that partially delimits the second side of the buried channel;
a fluid-input port and a fluid-output port in fluid communication with the buried channel;

a fluid-recirculating device fluidically connected to the fluid-input port and the fluid-output port, the fluid-recirculating device configured to cause a fluid to flow through the buried channel;
driving circuitry configured to bias the driving electrode with respect to the structural body to vibrate the structural body when the fluid flows through the buried channel; and
a sensor configured to sense a vibration of the structural body.