摘要：随着电压和电流等级的提高，传统的电磁式电流互感器已经不能满足测量要求。光纤电流传感器作为一种新的电力检测设备，通过其独特的优势，拥有着良好的市场前景。

论文首先针对现行光纤电流传感器在实用化中的不足的现状，提出了改进相位调制型光纤电流传感器的想法。利用Jones矩阵分析法，建立了反射式光纤电流传感器的理论模型，从而有利于程序的设计和仿真。59257

然后，根据传感器的输出信号的特点，设计了信号处理电路。针对输出信号在 数量级的现状，提出了需要对信号前置放大的想法。然后，使用相关检测技术，将一次谐波的幅值转变成直流信号，有利于信号的提取分离。然后利用低通滤波器，将直流信号分离。最后，针对Matlab完成的系统仿真模型的设计，进行了仿真分析。最后，使用不同曲线进行拟合，提出了使用四次拟合的建议。通过传感器的输入输出关系的分析，得出输入输出不呈现简单的线性关系的结论。

毕业论文关键词：光纤电流传感器；法拉第效应；琼斯矩阵；MATLAB仿真

Abstract：

As the voltage and current levels increase, the traditional assolenoid style current transformer cannot satisfy the measurement requirements. Optical fiber current sensor as an new power detection equipment, by its unique advantages and has a good prospect in the market. 

This paper first discusses the compared with traditional sensors, optical fiber current sensor has the advantages ，Then，at home and abroad optical fiber current sensor of a simple overview of the state。 The reflective fiber-optic current sensor has been designed basing Oil the phase modulated type fiber-optic current sensor．The theory model of the reflective fiber-optic current sensor has been established using Jones matrix analyzing method and the proper devices have been chose．According to the characteristics of the sensor’s output，signal processing circuits including photoelectric translating circuit，preamplifier，correlation detector, lowpass filter have been designed .The fundamental wave was changed into direct-current component through correlation detector.The simulation mode was established in the Matlab environment．The simulation analysis as well as the noise analysis was carried out．Finally, the analysis of the relationship between sensor's input and output was analyzed by using function fitting method．The fitting coefficients and error were given and quadratic or quartic curve fitting was proposed.

Keywords：fiber-optic sensor，Faraday effect，Jones matrix，MATLAB simulation 

摘要： 2

Abstract 3

第一章绪论 5

1.1课题来源及意义 5

1.2.1 国内研究现状 5

1.2.2 国外研究现状 6

第二章光纤电流传感器的理论基础 6

2.1光纤电流传感器的理论基础 6

2.1.1 偏振光 7

2.1.2 Jones矩阵 7

2.1.3  Faraday磁光效应 9

第三章光纤电流传感器的系统设计 10

3.1 结构设计 10

3.2 反射式光纤电流传感器的偏振态分析 11

3.3 反射式电流传感器的琼斯矩阵分析 12

第四章  全光纤电流互感器的系统仿真与分析