Novel rail transit transformer-used fluorescent optical fiber temperature controller

Abstract

The invention relates to a novel rail transit transformer-used fluorescent optical fiber temperature controller, which comprises a temperature acquisition unit, a multichannel temperature assembly module, a central processing unit, a liquid crystal man-machine interface unit and a switching power supply, wherein the optical fiber temperature sensor of the temperature acquisition unit adopts a fluorescent material based on a rare earth material as a sensor probe; fluorescent signals generated after the sensor probe is excited are transmitted to a photoelectric conversion module through a multimode fiber and are converted to current signals and then transmitted to the multichannel temperature assembly module and further transmitted to the central processing unit; the central processing unit processes temperature assembly signals and then the signals are outputted and displayed; and the multichannel temperature assembly module, the central processing unit, the liquid crystal man-machine interface unit, the photoelectric conversion module and the switching power supply are electrically isolated from the optical fiber temperature sensor and a contact output system. Total isolation of external input and output electric signals of the temperature controller can be realized in real sense, and compared with the previous temperature controller, the temperature controller of the invention is greatly improved in performance.

Description

technical field [0001] The invention relates to a new type of fluorescent optical fiber temperature controller for rail transit transformers, which is applied to the temperature measurement and control of special transformers-rail transit transformers, and can also be extended to realize hot spots such as master strips, contacts, and cable heads of switch cabinets in substations. Measurement of temperature. Background technique [0002] There are more or less defects in some existing thermostat design schemes, as follows: [0003] For example, Wang Dongsheng of Hebei Engineering University proposed "optical fiber temperature sensor based on rare earth fluorescent materials" in 2007. Using rare earth fluorescent materials, a set of fluorescent optical fiber temperature measurement system is designed. The system selects an economical and practical light-emitting diode as the light source, uses the rare earth material Y2O2S:Eu+Fe2O3 as the sensitive material, and measures the...

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Problems solved by technology

And it uses fluorescent optical fiber as a sensor, it can feel the excitation of external light to generate fluorescence, and only needs to feel the presence or absence of fluorescence, without detecting the characteristics of fluorescence intensit...

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