摘要
为了能够实时方便快捷地研究岩石在受压下的应变情况,采用数字实时全息的方法,将1块15cm×15cm×1.5cm的岩石装在3维加力架上作为研究对象,在数字实时全息的光路中用CMOS采集记录下岩石在不同条件下受压应变过程中的应力场分布及其变化情况的干涉条纹,并将这一个视频文件用MATLAB编程语言做还原处理,得到了岩石在常温条件下、温度变化条件下、预打孔条件下受压应变时实时的变化情况。结果表明,数字实时全息法是一种高精度、无损、全场的检测方法。数字实时全息法不仅能够方便快速地得到岩石在不同受力条件下实时的变化情况,而且还能够得到与岩石类似的其它材料的受力应变的情况。
In order to study the strain of rock under pressure in real time and conveniently, real-time digital holographic method was adopted. With a 15cm × 15cm × 1.5cm rock loaded in a 3-D afterburner shelf, the rock stress field distribution and evolution of the interference fringes under different conditions in the process of compression strain were collected and recorded with a CMOS in real-time digital holographic optical path. Then, this video file was restored with MATLAB and the rock at ambient temperature conditions, the pre-drilling strain under the conditions of pressure changes in real time were obtained. The results show that real-time digital holographic method is a high-precision, non-destructive detection method. Real-time digital holographic method can detect the real time tress conveniently and fast not only on the rock but also on other similar materials.
出处
《激光技术》
CAS
CSCD
北大核心
2010年第4期502-505,共4页
Laser Technology
关键词
全息
应力场
数字实时全息法
动态变化
holography
stress field
digital real-time holographic method
dynamic change
