摘要
光纤涂覆层对光纤的性能有较大影响。在涂覆层几何参数的测量过程中,由于涂覆层的切割过程易产生较大形变,而且往往造成边缘模糊,因此直接对其进行边缘拟合求几何尺寸的方法会造成较大误差。使用小波阈值法去除图像高频信号中的噪声部分,保护边缘信息,使用自适应阈值的Canny算子提取有效边缘,利用可变的半径限制在形变较大的情况下区分边缘,最后通过函数拟合求取几何参数。以一次涂覆层直径为例,仪器测得直径为185.298μm,重复测量精度为0.112μm,当切割条件不好时,仪器测量值变为184.516μm,测量精度变为0.198μm。该方法前后测量值为184.599、184.613μm,测量精度分别为0.054、0.075μm,实验对比表明,该方法有效提高了光纤涂覆层几何参数测量的准确性与稳定性。
Fiber coating is very important to the performance of fiber. In the process of measuring the geometric parameters of the coating layer, because the cutting process of the coating layer is easy to produce a large deformation, and often causes the edge fuzzy, so the method of direct edge fitting to obtain the geometric size of the coating layer will cause a large error. The wavelet threshold method is used to remove the noise part in the high-frequency signal of the image to protect the edge information. The effective edge is extracted by the Canny calculation of adaptive threshold. The variable radius is used to limit the edge in the case of large deformation, and the geometric parameters are obtained by function fitting. Taking the diameter of a coating layer as an example, the diameter measured by the standard instrument is 185.298 μm, and the repeat measurement accuracy is 0.112 μm. When the coating layer is not cut properly, the measurement value of the instrument becomes 184.516 μm and the measurement accuracy becomes 0.198 μm. The measured values before and after the method are 184.599 and 184.613 μm, and the measurement accuracy is 0.054 and 0.075 μm respectively. Experimental comparison shows that the method effectively improves the accuracy and stability of the measurement of the geometric parameters of the optical fiber coating.
作者
赵仁燕
李祥鹏
涂建坤
江斌
郑刚
Zhao Renyan;Li Xiangpeng;Tu Jiankun;Jiang Bin;Zheng Gang(Shanghai Engineering Research Center of Interventional Medical Device,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Cable Research Institute,Shanghai 200093,China)
出处
《电子测量技术》
北大核心
2021年第13期35-40,共6页
Electronic Measurement Technology
关键词
光纤涂覆层
几何参数
小波阈值去噪
改进Canny算子
optical fiber coating
geometric parameters
wavelet threshold denoising
improved Canny operator
