关键词: 皮革收缩温度, 位移测量, OpenCV, 树莓派, 图像处理

Abstract: When detecting the shrinkage temperature of the leather material, it is necessary to measure the deformation of the sample length in real-time during the heating process to determine whether it shrinks and then obtain the corresponding temperature during shrinkage. The leather shrinkage temperature measuring instrument cannot accurately measure the tiny displacement of the shrinkage deformation of the leather sample. With the Raspberry Pi-4B embedded platform as the image processor, based on the cross-platform C++ graphical user interface development framework Qt, calling the OpenCV image processing function library, and combined with the optical path design to achieve a non-contact high-precision measurement system for the tiny displacement of the leather sample has been developed. The system not only improves the detection accuracy to 0.01 mm, but also realizes the detection condition of 3 g constant tension and displays the data of the whole detection process on the friendly man-machine interface in the form of curves, graphs, and key data in real-time, it provides strong technical support for professional analysis and research, and the system operates stably and reliably.

Key words: leather shrinkage temperature, displacement measurement, OpenCV, Raspberry Pi, image processing