傅里叶变换投影栅线法测量大物体的变形

Displacement Measurement for Large sized Object by Fourier Transform Profilomentry Project Grating Method

本文利用傅里叶变换投影栅线技术对大物体的离面变形进行了测量，分析了大物体的尺寸给测量过程带来的主要矛盾，讨论了方法的灵敏度和精度，用计算机数值模拟技术给出了大尺寸引起的频率变化所带来的误差。结果表明，傅里叶变换投影栅线技术可以用于大尺寸物体离面变形的精确测量。

Off plance displacement of large sized object is measured by Fourier Transform Profilometry (FTP) Project Grating Method. Sensitivity and resolution of the method are discussed, and the error resulted from carrier frequency change is investigated by computer numerical simulation technique. The test shows that the FTP Project Grating Method is feasible for precise off plane displacement measurement of large object.