基于光纤式图像位移测试系统的研究

Research on Image Displacement Measurement System Based on Optical Fiber

针对复杂结构狭小空间里的位移测量难题,提出一种基于光纤式图像位移非接触式测试系统。分析该测试系统的测量原理和系统功能,并对总体方案和硬件选型进行设计;为实现图像位移计算,根据光纤内窥镜拍摄图像的特点采取区域提取、图像校正、增强、二值化等数字化处理流程;软件界面采用C++语言、基于网络平台进行开发,以对话框方式进行架构,涵盖各项测量数据的显示;最后对测试系统进行比对、离心、振动试验验证。试验结果表明:该测试系统的测量精度可达10μm,能够适应多种复杂环境下复杂结构狭小空间里的位移测量。

Aiming at the problem of displacement measurement in narrow space with complex structure,a non-contact measurement system of image displacement based on optical fiber is proposed.The measurement principle and system function of the test system are analyzed,and the overall scheme and hardware selection are designed.In order to realize the image displacement calculation,the digital processing processes such as region extraction,image correction,enhancement and binarization are adopted according to the characteristics of the image taken by the fiber optic endoscope.The software interface is developed by C + + language,based on the network p latform,and constructed in the form of dialog box,covering the display of various measurement data.Finally,the test system is verified by comparison,centrifugal and vibration tests.The experimental results show that the measurement accuracy of the te st system can reach 10 μm,and the system can adapt to the displacement measurement of complex structures in a narrow space in a variety of complex environments.