A FIBER-OPTIC SENSOR Russian patent published in 2007 - IPC G01B11/02 

FIELD: the invention refers to measuring technique and may be used for measuring displacements and vibrations with a non-invasive mode.

SUBSTANCE: the fiber-optic sensor has an emissive and two receiving light pipes unequally distant from the controlling surface, a source of emission, a measuring bridge in whose arms there are two resistors and photodiodes in quality of photo receivers connected in accordance with the scheme with a common anode, a source of feeding, four arrangements for selection and storing, a commutator, an analogue-digital converter and a computing device. The technical result is in increasing accuracy of measurements at the expense of providing invariance to changing parameters of the source of feeding, the source of emission, to changing of the magnitude of a coefficient of the reflection of the surface of the controlled object and also possibility to increase sensitiveness of the arrangement to the measured parameter at the expense of using of the two photo receivers in the measuring process.

EFFECT: increases accuracy of measuring.

2 dwg