Subject of Research. A stereoscopic method of technical vision is proposed for recording the kinematic characteristics of the dynamic indentation process in determining the physico-mechanical properties of materials. The proposed method makes it possible to determine the values of the indenter motion speed with high accuracy. Method. The method is based on the use of two high-speed video cameras immovably fixed on one flat platform. Cameras allow for synchronous recording of the indentation process. The objectives and orientation of cameras in the stereo system provide intersection of the visual fields and the required depth of the image space field. Measurement of the movement speed is performed by triangulation method. The distance between the conjugate points of the recorded object on the stereo images is inversely proportional to the distance between the pair of cameras and the corresponding point of the object in the three-dimensional space. Based on the analysis of images obtained by spatially separated cameras, the coordinates of the object point are determined. Main Results. The experimental setup consisted of two high-speed monochrome camcorders Evercam 4000-32-M, rigidly fixed through stereo. Synchronous recording was kept at a speed of 4000 frames/s with a resolution of 1280 × 860 pixels. The indenter was made in the form of a steel ball with a mass of 230 g with a diameter of 38 mm and fell onto an aluminum disk 10 mm thick from a height of 310 mm. Video images from cameras were transferred to a personal computer for processing. The analysis of the obtained data was carried out in the MATLAB system with the help of a specially written software module. The sensitivity of the proposed method made it possible to determine confidently the values of the maximum approach speed of a steel ball equal to 2.39 m/s and a rebound velocity of 1.2 m/s. The random component of the method error did not exceed 2.5%. Practical Relevance. The development of this approach will enable to create high-precision sensors of dynamic indentation. The research results may be of interest to specialists involved in metrological support and non-destructive testing of materials and products in various fields of engineering and construction.
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机译：研究主题。提出了一种技术视觉的立体方法，用于记录动态压痕过程的运动特性，在确定材料的物理机械性能方面。所提出的方法使得可以高精度地确定压缩运动速度的值。方法。该方法基于在一个平台上不可移动的两个高速摄像机的使用。摄像机允许对缩进过程同步记录。立体声系统中摄像机的目标和方向提供了视野和图像空间场所需深度的交叉点。通过三角测量方法执行移动速度的测量。在立体图像上记录对象的共轭点之间的距离与一对相机之间的距离与三维空间中的对象的对应点之间的距离成反比。基于通过空间分离的相机获得的图像的分析，确定对象点的坐标。主要结果。实验设置包括两个高速单色摄像机Evercam 4000-32-M，刚性地通过立体声固定。同步录制以4000帧/秒的速度保持，分辨率为1280×860像素。压头以钢球的形式制成，质量为230克，直径为38mm，落在厚的铝盘上，从310mm的高度厚。摄像机的视频图像被转移到个人计算机以进行处理。在特殊书面的软件模块的帮助下，在Matlab系统中对所获得的数据进行分析。所提出的方法的敏感性使得可以自信地确定钢球的最大方法的值等于2.39m / s，反弹速度为1.2 m / s。方法错误的随机组件不超过2.5％。实际相关性。这种方法的开发将使能为动态缩进的高精度传感器。研究结果可能对参与的专家感兴趣，以及在各种工程和建筑领域的材料和产品的无损检测。
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