Patent ID: 11946467
Assignee: STMICROELECTRONICS S.R.L.
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F

Claim 0:
1. A device configured to measure a flow of fluid inside a tube moved by a peristaltic pump, the device comprising:
a detection electrode arrangement coupled to the tube, and configured to detect an electrostatic charge variation originated by an action of the peristaltic pump on the tube;
a signal processing circuitry coupled to the detection electrode arrangement, and configured to generate an electrical charge variation signal based on the electrostatic charge variation; and
a processor coupled to the signal processing circuitry, and configured to:
receive and process, in a frequency domain, the electrical charge variation signal to obtain flow information for the fluid based on frequency characteristics of the electrical charge variation signal;
determine amplitude values of harmonics of the electrical charge variation signal; and
determine a type of the fluid based on the amplitude values of the harmonics.