Optical fiber grating temperature current-sensing device and measurement device thereof

Abstract

This invention relates to a kind of optical fiber and pattern temperature current sensing device; belongs to fiber optic sensor techno-sphere. The character lay: the invention is formed by optical fiber and pattern, alternate current solenoid. Part optical fiber and pattern directly uncover in atmospheric environment, another part optical fiber and pattern surface has metallic conductor; the metallic conductor form closed loop circuit,and place in interior of alternate current solenoid. For the alternating current generate burble heat on the closed metallic conductor of optical fiber pattern surface, it make these part optical fiber pattern period occur chance, wherefore optical fiber pattern possess two reflection peak, respectively correspond to scale of ambient temperature and alternate current. thus such optical fiber grating sensor could simultaneous measure temperature and current two physics parameter, possessing merit of device compactness, light in weight, good electrical insulation properties, easy fixing, no need plus power supply and so on, fitting for measuring of electric system alternate current.

Description

technical field [0001] The invention relates to an optical fiber grating temperature and current sensor, which belongs to the technical field of optical fiber sensor devices. Background technique [0002] With the development of optical communication technology, some technologies in optical communication gradually provide a technical platform for applications in the sensing field, and fiber grating is one of them. In addition to its huge application in the field of optical communication, fiber gratings also have great application prospects in the field of sensing. At present, fiber grating sensors have been used in the measurement of various physical quantities, such as temperature, strain, voltage, current, and micro-vibration. [0003] The traditional oil-immersed current and voltage transformers that are still used in power systems have many shortcomings such as large size, high cost, and easy overheating to cause explosions. However, optical fiber-based current and volta...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings of traditional oil-immersed current and voltage transformers, which are large in size, high in cost, and prone to explosion due to overheating, and the existing optical fiber current and voltage transformers are not sensitive to the change of the light polarization angle with the current, and the cost is low. High, can not measure the shortcomings of multi-parameters, a fiber grating temperature current sensor and its measurement device are proposed

Images