A kind of manufacturing method of quarter wave plate for temperature compensation

Abstract

The invention discloses a manufacturing method of a quarter wave plate used for temperature compensation of an optical fiber current transformer, which can realize the stable and consistent current ratio difference of the optical fiber current transformer in the whole temperature range in the mass production process, Reduce the defect rate of products and ensure the long-term working accuracy and stability of the fiber optic current transformer. The method includes the following steps: (1) establishing a mathematical model of the optical fiber current transformer; (2) measuring the phase delay of the elliptical core optical fiber; (3) manufacturing a quarter-wave plate. The advantages of the present invention are that the manufacturing process scheme of the quarter-wave plate is stable and consistent, and the stability and consistency of the current ratio difference of the optical fiber current transformer system in the full temperature range can be realized, thereby improving the optical fiber current mutual inductance. performance and yield of the system.

Description

technical field [0001] The invention belongs to a method for manufacturing components in an optical fiber current transformer, in particular to a method for manufacturing a quarter-wave plate used for temperature compensation of an optical fiber current transformer. Background technique [0002] Fiber optic current transformer is a kind of current measuring equipment based on Faraday effect, which has the advantages of good insulation, high reliability and strong anti-electromagnetic interference ability. Compared with traditional electromagnetic current transformer, the measurement range of fiber optic current transformer is Large and wide response frequency, it has obvious advantages in the measurement of DC current, the grid connection of intermittent power supply and the application of UHV AC transmission. Current transformers have irreplaceable status and broad market prospects in the new generation of intelligent substations. [0003] At present, the system structure ...

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Problems solved by technology

[0005] Aiming at the defect of poor temperature stability of optical fiber current transformers, domestic and foreign scholars have proposed various temperature compensation schemes. These methods are aimed at local temperature monitoring of optical fiber current transformers, so as to establish a simplified dynamic temperature model and analyze the influence of temperature. and compensate for it

This method undoubtedly increases the process in the mass production process, and the effect of temperature compensation is also affected by the temperature performance of the transformer before compensation

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