| 张盛龙1， 张周强1，2*， 潘义峰1.基于显微条纹投影的针舌冲压模具测量系统[J].轻工机械,2025,43(1):72-77 |
| 基于显微条纹投影的针舌冲压模具测量系统 |
| Latch Stamping Die Measurement System Based on Microfringe Projection |
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| DOI：10.3969/j.issn.1005 2895.2025.01.010 |
| 中文关键词: 织针 针舌 冲压模具 三维显微测量 显微条纹投影 |
| 英文关键词:needle needle tongue punching die 3D microscopy measurement microscopic stripe projection |
| 基金项目:国家自然科学基金青年项目(61701384)；陕西省教育厅重点科学研究计划项目(20JS051)；陕西省自然科学基础研究计划项目(2023JCYB288)；西安工程大学柯桥纺织产业创新研究院项目(19KQYB03)。 |
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| 中文摘要: |
| 针对目前国内织针针舌冲压模具的检测仍停留在手工阶段，课题组设计了一种基于液晶显示（Liquid Crystal Display，LCD）投影系统与长焦镜头（Light WorkDistance，LWD）结合的显微条纹投影三维检测系统。该系统由1组自制光学投影装置、1个（Charge Coupled Device，CCD）相机、1个机械平移台和1台工业显微镜模组组成，通过相机采集调制变形条纹图像，先进行图像预处理，使用高斯滤波算法预处理滤除图像噪声，利用4步相移算法和解包裹算法，对调制条纹的相位变化进行精确解析，通过相位 高度标定实验，拟合出标定模型的参数同相位和高度的拟合比例关系，得到被测物体真实高度，从而进行三维重建。使用该系统以织针针舌冲压模具工作曲面部位为检测对象进行试验，与精密塞尺测量结果进行对比，结果表明该系统测量误差在10 μm以内，证明该系统能够对微小精密器件实现精确测量。 |
| 英文摘要: |
| In response to the current domestic manufacturing and detection of needle tongue punch molds still being at the manual stage, a three dimensional detection system of microfringe projection based on an Liquid Crystal Display (LCD) projection system combined with an Light WorkDistance (LWD) telephoto lens has been designed by the research group. The system was composed of a set of self made optical projection devices, a Charge Coupled Device (CCD) camera, a mechanical translation stage and an industrial microscope module. By capturing modulated deformed fringe images through the CCD camera, image preprocessing was first conducted, and a Gaussian filtering algorithm was utilized to effectively eliminate image noise. The phase variation of the modulated fringe was precisely analyzed by using a four step phase shifting algorithm and an unwrapping algorithm. Through phase height calibration experiments, the parameters of the proportional relationship of calibration model between phase and height were determined, allowing for the acquisition of the true height of the measured object, which enables three dimensional reconstruction. This system was used to test the working surface of needle tongue punch molds, and the results were compared with the measurement results of the precision feeler gauge. The measurement results indicate that the measurement error of the equipment is within 10 micrometers. The aforementioned test results demonstrate that this system is capable of performing precise measurements on small and precision devices. |
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