实现线性测量的光学电压传感器设计

发布时间：2018-02-26 17:09

本文关键词： 光学电压传感器线性测量偏振光栅电光相位延迟　出处：《电力系统自动化》2017年03期 　论文类型：期刊论文

【摘要】：设计了一种采用径向偏振光栅实现线性测量的光学电压传感器。将光学晶体的电光相位延迟角转化成环形光斑的同步旋转,由图像转换器将环形光斑转换为条形光斑,通过图像采集系统定位条形光斑暗纹的中心位置来获得被测电压值。应用琼斯矩阵证明了光斑暗纹中心位置与晶体电光相位延迟角之间的线性关系,给出了计算方法,并给出了锗酸铋(BGO)晶体和铌酸锂(LN)晶体的实验验证。结果表明该光学电压传感器的测量模式与光强无关,可直接测量172°的电光相位延迟角,测量误差小于0.5%,实现了对电压的线性测量。
[Abstract]:An optical voltage sensor using radial polarization grating to realize linear measurement is designed. The electro-optic phase delay angle of the optical crystal is transformed into the synchronous rotation of the ring spot, and the ring spot is converted into a stripe spot by the image converter. The measured voltage is obtained by locating the center position of the stripe speckle dark grain by the image acquisition system. The linear relationship between the center position of the spot dark grain and the delay angle of the electro-optic phase of the crystal is proved by using Jones matrix, and the calculation method is given. The experimental results of bismuth germanate (BGOG) crystal and lithium niobate (LNO) crystal show that the measuring mode of the optical voltage sensor is independent of the intensity of the light and can directly measure the electro-optic phase delay angle of 172 掳. The measuring error is less than 0.5 and the linear measurement of voltage is realized.
【作者单位】：福州大学电气工程与自动化学院;福建信息职业技术学院电子工程系;
【基金】：国家自然科学基金资助项目(51177016)~~
【分类号】：TP212

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