FIBER-OPTIC PRESSURE TRANSDUCERS AND PRESSURE MEASUREMENT SYSTEM INCLUDING THEM Russian patent published in 2003 - IPC

FIELD: monitoring of environment. SUBSTANCE: the fiber-optic transducer has a core of the optical fiber having at least one lattice formed along at least one its part, the first shell enveloping the mentioned core and containing a means perceiving the pressure for transformation of isotropic pressure forces into anisotropic pressure forces on the above core, double-beam refraction means for improvement of double refraction in the mentioned core. The double-beam refraction means may include the second elliptic shell between the mentioned core and the mentioned first shell, or a means having a pair of longitudinal rods built in the first shell. The means perceiving the pressure includes a pair of longitudinal holes or material sensitive to pressure, or a capillary tube enveloping the first shell, the mentioned capillary tube has a pair of longitudinal holes in essence parallel with the mentioned shell. The method of measurement of pressure or lateral deformation includes the direction of light from the source of light to the core of the fiber-optic transducer with a lattice on the core of the fiber, optical connection of the spectrum analyzer to the fiber-optic transducer with a lattice, measurement of distance between two spectral peaks detected by the spectrum analyzer. EFFECT: enhanced resolution and dynamic range. 27 cl, 28 dwg