Developmental Research of TV Camera for Non-contact and Real-time Measurement of Strain Distribution

研制了一种用于非接触实时测量位移和应变分布的电视摄像系统。1.为了分析该系统拍摄表面带有光栅的试样所获得的图像。利用扫描莫尔法和移位法。建立了测量理论。2.完成了实现该理论的硬件。Moire方法通过选择个人计算机上的菜单之一来容易地选择移位方法和扫描莫尔条纹方法。3.一个相机适配器，显示相同的效果作为一个莫尔法使用阿达玛变换。获得了更清晰的图像。4.开发了一个通用的图像处理程序PIMPOM。5.用胶粘剂制作了橡胶光栅片，并制作了光栅橡皮图章。6.通过对仿真图像的分析，验证了系统的有效性. 7.利用该系统测量了橡胶板的位移和应变分布。8.将该系统应用于含载波图案的全息图像，分析了小位移分布。我们将进行更多的应用。而且。我们将联合收割机与高速摄像机相结合。我们希望把这套系统公开出售给公众使用。

A TV camera system for non-contact and real-time measurement of displacement and strain distributions was developed. 1. In order to analyze the image obtained by taking a specimen with a grating on its surface by the system. a scanning moire method and a shift method were utilized. The theory of the measurement was established. 2. The hardware for performing the theory was made. The moire method. the shift method and the scanning moire method are easily selected by chosing one of menus on a personal computer. 3. A camera adapter which shows the same effect as a moire method using Hadamard transform was made. Clearer images were obtained. 4. A wide-use image processing program PIMPOM was developed. 5. Rubber grating sheets with adhesive and a rubber stamp of a grating were made. 6. The effectiveness of the system was confirmed by analyses to a simulation image. 7. Displacement and strain distributions in rubber plates were measured by the system. 8. By adopting the system to holographic images with carrier patterns, small-displacement distributions were analyzed. We will perform still more applications. Moreover. we will combine the system with a high speed video camera. We hope to send this system on the marker for public use.