Patent · US Active

Device and process for measuring the velocity of flow of a fluid using pulse signal generated based on feedback

US7823444B2 · kind B2 · utility

5Cited by

8References

25Claims

0Family size

Assignee

Dräger Medical AG & Co. KG · DE

Inventors

Ulf ZSCHERNACK · Bad Schwartau, DE
Henning Gerder · Lübeck, DE
Hartmut Stark · Stockelsdorf, DE

Key dates

Filing date	Sep 30, 2008
Grant date	Nov 2, 2010
Priority date	—
Expiry date	Jan 21, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01F15/028
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A device is provided for measuring the velocity of flow of a fluid in a respiration system and includes a first thermal sensor element (5) provided with a controllable heating element (50) and a second thermal sensor element (6). The thermal sensor elements (5, 6) are arranged at spaced locations from one another at a path of flow, so that a thermal signal generated by the first sensor element (5) with the heating element (50) is transmitted to the second sensor element (6), and the second sensor element (6) is designed to detect the thermal signal from the fluid flow. The second sensor element (6) is connected to the first sensor element (5) via feedback (12) which triggers another thermal signal. A controlling and analyzing device (13, 15) is connected to the sensor elements (5, 6) to start the generation of a first thermal signal and to read and analyze the signal frequency as an indicator of the velocity of flow.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.