成像型任意反射面速度干涉仪数据处理方法
Data processing method of imaging velocity interferometer system for any reflector
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摘要: 采用傅里叶变换方法，列出了对成像型任意反射面速度干涉仪得到的干涉条纹图进行处理的过程。利用文献结果，处理了冲击波整形时产生的有间断干涉条纹图，对处理结果进行了分析。结果表明：条纹图要干净，条纹间距清晰、均匀，应使用１维傅里叶变换的方法处理条纹图，减小滤波的难度。研究了冲击波测试当中条纹丢失的问题，提出了间断条纹图间断起始点相位确定的方法。对透明和不透明靶产生条纹图的不同进行了讨论，得出对透明靶产生的条纹图应采用适当的条纹外延技术进行预处理后再进行常规处理。Abstract: The data processing procedure for imaging Velocity Interferometer System for Any Reflector(VISAR) has been listed with Fourier transform method. Fringe loss problem in shock wave experiment with imaging VISAR technique has been researched. The fringe loss image from the reference has been processed with Fourier transform method. The fringe image should be clear and uniform, and the one-dimensional Fourier transform method is recommended to reduce the difficulty in filtering the image. The method to confirm the loss point in the fringe loss has been provided. The difference between interference fringes for the opaque and transparent targets is discussed. It is concluded that the fringe from the transparent target should be preprocessed with extension technique before using the normal data
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Key words:
- shock wave /
- data processing /
- fourier transform /
- fringe loss
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