Distributed optical fiber on-line monitoring system for deformation and temperature of transformer winding

The utility model belongs to the field of photoelectric detection and health detection of a large-sized structure, and rebates to a distributed optical fiber on-line monitoring system for the deformation and temperature of a transformer winding. The system comprises at least one group of optical fiber sets to be detected, a first distributed feedback semiconductor laser device and a second distributed feedback semiconductor laser device, wherein the optical fiber sets to be detected are wound on the transformer winding and are gated by an optical switch. Single-mode laser generated by the first laser device is divided into two bundles, wherein one bundle of laser forms x-direction polarized light after amplifying and frequency scanning and is then injected into one ends of the gated optical fiber sets to be detected, and the other bundle of laser is modulated into short-impulse detection light and is then injected into the other ends of the gated optical fiber sets to be detected after being amplified and forming x-direction polarized light; continues pump light is converted into an electric signal and is then transmitted into a computer; single-mode laser emitted by the second laser device forms y-direction polarized light and then enters the optical fiber sets to be detected, and generated backward diffraction light is filtered, converted into an electric signal and is then transmitted into the computer. The system can carry out direct and on-line monitoring on the large-sized transformer winding.