单目CCD离面位移测量

以针孔成像原理为基础,利用结构表面的离面位移与所成图像中散斑颗粒的应变的线性对应关系,通过计算散斑应变场的方法来计算结构表面的离面位移场,对其理论进行数字模拟分析.数字模拟结果表明,该方法可进行离面位移场测量,测量精度高,与理论相符.还用该方法进行了离面位移试验,试验结果及分析表明,噪音对该方法的影响很小,离面位移测量精度为毫米,可应用于土木工程结构试验中.

Out-of-plane displacement measurement based on single CCD

This article is based on the pinhole imaging principle, using the relationship be- tween out-of-plane displacement of the structure and Image speckle particles strain linear corresponding,And through the calculated speckle strain field method the out-of-plane dis- placement field of the surface of the structure is calculated. Numerical simulation results show that this method can calculate out-of-plane displacement field with high accuracy, and is consistent with the theory. Using this method has made the out-of-plane displacement test. The test results and analysis show that affected by the noise of this method has little effect,Out-of-plane displacement measurement is with the accuracy of ram. This method can be used in the test of civil engineering structures.