Pressure measuring device and method

Details Pressure measuring device and method Pressure measuring device and method

2008-12-15

2010-11-16

Thompson, Jewel (Department: 2855)

Measuring and testing

Fluid pressure gauge

Photoelectric

Reexamination Certificate

active

07832276

ABSTRACT:
A device to measure a fluid pressure comprises a pressure sensing element10and a pressure readout element20. The pressure sensing element10comprises a cavity11capped by a flexible membrane13, the cavity having a length d that varies with the fluid pressure P1applied on the flexible membrane13. The pressure readout element20comprises a light source24for providing an incident beam of a determined wavelength range directed towards the cavity and an optical spectral analyzer25for measuring a power spectrum of a return beam reflected by the cavity, and processing means27for determining the cavity length d and the fluid pressure P1based on the power spectrum.

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