Pressure measuring device

Patent metadata

Field	Value
Publication number	US-9404824-B2
Application number	US-201314378827-A
Country	US
Kind code	B2
Filing date	Feb 15, 2013
Priority date	Feb 16, 2012
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

A pressure measurement device for enabling non-intrusive pressure measurement of a first fluid present in a volume having at least one wall is provided. The device includes an enclosed space filled with a second fluid, a transmitter provided in the enclosed space and adapted to transmit a standing wave in a direction of the wall, means for varying a pressure of the second fluid in the enclosed space, a detector for measuring data related to a resonance of the wall and a processor for determining a characteristic change in the data.

First claim

What is claimed is:

1. A pressure measurement device for enabling non-intrusive pressure measurement of a first fluid present in a volume having at least one wall, the device comprising:
an enclosed space filled with a second fluid;
a transmitter provided in the enclosed space and adapted to transmit a standing wave in a direction of the said wall;
means for varying a pressure of the second fluid in the enclosed space;
a detector for measuring a data related to a resonance of the wall; and
a processor for determining a characteristic change in said data.

2. The device according to claim 1 , wherein the standing wave is a monochromatic plane wave.

3. The device according to claim 1 , wherein the wave is electromagnetic or acoustic.

4. The device according to claim 1 , being adapted to be attached on the said wall.

5. The device according to claim 4 , comprising a clamping unit for enabling said attachment.

6. The device according to claim 1 , wherein the volume is confined by a pipe.

7. The device according to claim 1 , wherein the first fluid is the same as the second fluid.

8. The device according to claim 1 , wherein the pressure of the second fluid is varied between 1-1000 bar, preferably between 1-10 bar.

9. The device according to claim 1 , wherein the means for varying the pressure is a pump.

10. The device according to claim 9 , wherein the pump is controllable by the processor.

Assignees

• Nederlandse Organisatie Voor Toegepast—Natuurwetenschappelijk Onderzoek Tno
• Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno

Inventors

• Volker Arno Willem Frederik

Classifications

• G01L9/0008 Primary

  using vibrations · CPC title

• G01N9/002

  using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis (G01N9/34 takes precedence) · CPC title

• G01L11/04

  by acoustic means · CPC title

• G01L11/02

  by optical means · CPC title