FIBER-OPTIC PRESSURE TRANSDUCER Russian patent published in 2005 - IPC

FIELD: measurement technology.

SUBSTANCE: pressure transducer on the base of tunnel effect can be used in different branches of national economy, for example, for measuring high pressures at changes in environmental temperature within ±100C range for items of rocket-space equipment. Transducer has case, supplying and tapping fibers, quartz membrane mounted to have a gap in relation to common edge of fibers and fixed tightly inside coupling, and ring-shaped gasket which has thickness being equal to wavelength of radiation source. Fibers are glued inside the case to be spaced from each other. Free ends of fibers protrude outside surface of case. Ring-shaped gasket is made in form of metal film applied along perimeter. Device also has item having triangle in cross-section. The triangle has apex angle of 2θ. It also has side recess which follows shape and sizes of optical fibers. Metal cap of case has central through hole having width to be equal diameter of optical fiber of d (of) and length of a found from ratio of a=2d(of)tgθ. Cap is tightly mounted between case and coupling to press optical fibers against item having triangular cross-section. Part of optical fibers disposed above the cap is cut away and polished at specific angle to longitudinal axes of fibers.

EFFECT: increased precision of measurement; simplified procedure of measurement.

3 dwg