Pressure transducer employing a micro-filter and emulating...

Details Pressure transducer employing a micro-filter and emulating... Pressure transducer employing a micro-filter and emulating...

2006-04-21

2009-02-03

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S756000

Reexamination Certificate

active

07484415

ABSTRACT:
A pressure transducer for measuring pressures in high temperature environments employs a tube which is terminated at one end by an acoustic micro-filter. The acoustic filter or micro-filter has a plurality of apertures extending from one end to the other end, each aperture is of a small diameter as compared to the diameter of the transducer and the damper operates to absorb acoustic waves impinging on it with limited or no reflection. Mounted to the tube is a pressure transducer with a diaphragm flush with the inner wall of the tube. The tube is mounted in an aperture in a casing of a gas turbine operating at a high temperature. The hot gases propagate through the tube where the pressure of the gases are measured by the transducer coupled to the tube and where the acoustic filter operates to absorb acoustic waves impinging on it with little or no reflection, therefore enabling the pressure transducer to be mainly responsive to high frequency waves associated with the gas turbine operation.

REFERENCES:
patent: 4994781 (1991-02-01), Sahagen
patent: 5587601 (1996-12-01), Kurtz
patent: 5770806 (1998-06-01), Hiismaki
patent: 5939639 (1999-08-01), Lethbridge
patent: 6070469 (2000-06-01), Taniguchi et al.
patent: 6363792 (2002-04-01), Kurtz
patent: 6612178 (2003-09-01), Kurtz et al.

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