Measuring and testing – Fluid pressure gauge – Photoelectric
Patent
1993-10-06
1995-01-31
Chilcot, Jr., Richard E.
Measuring and testing
Fluid pressure gauge
Photoelectric
73706, 25022723, 25023119, G01L 900
Patent
active
053850530
ABSTRACT:
The invention is related to numerous improvements for fiber optic measuring systems, and principally those utilizing a deformable diaphragm for sensing pressure. One feature of the invention is particularly oriented to automotive engine combustion chamber pressure measurement. For that application, a sensing tip shielding technique is described using a sintered metal porous plug, which reduces temperature fluctuations experienced at the sensing tip and shields the sensing tip from corrosive materials. A technique for compensation of a fiber optic pressure sensor is also described. In that method, a referencing wavelength is partly reflected and partly transmitted past a filter coating at the sensing end of the optical filament. This technique of the sensor provides improved calibration.
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Vokovich Daniel
Wlodarczyk Marek T.
Chilcot Jr. Richard E.
Felber Joseph L.
FiberOptic Sensor Technologies
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