吹膜厚度均匀性视觉检测与伺服控制系统  

Visual Inspection and Servo Control System for Uniformity of Blown Film Thickness

作　　者：王涛[1] 张兵 陶学攀 李文杰 朱家君 WANG Tao;ZHANG Bing;TAO Xue-pan;LI Wen-jie;ZHU Jia-jun(School of Information and Electrical Engineering,Shandong Jianzhu University,Ji’nan 250101;Shandong Key Laboratory of Intelligent Building Technology,Ji’nan 250101)

机构地区：[1]山东建筑大学信息与电气工程学院,山东济南250101 [2]山东省智能建筑技术重点实验室,山东济南250101

出　　处：《制造业自动化》2025年第3期120-126,共7页Manufacturing Automation

基　　金：山东省自然科学基金(ZR2022MF267)。

摘　　要：针对薄膜生产过程中因出料不均匀而影响产品质量、浪费人力物力等问题,提出了一种基于视觉伺服的吹膜厚度均匀性检测及控制一体化系统的设计方法。视觉检测模块以机器视觉及图像语义分割算法为基础,通过摄像头对成型薄膜轮廓监测识别,提取塑料薄膜外形轮廓的图像信息,提出了一种中线拟合算法对薄膜的不对称性进行计算分析,检测薄膜的厚度均匀性。控制模块以双轴插补直线运动为基础,根据检测模块给出的不对称度信息以及位置信息,在装有两轴伺服电机的XY移动平台上对膜口间隙调节机构进行实时控制与反馈,保证膜口出料的均匀性和整体质量。实验结果表明,所设计的系统图像处理置信度可达97%,偏离度识别误差0.485°,插补控制误差0.098 mm,满足系统需求。A design method for an integrated system for detecting and controlling the thickness uniformity of blown film based on visual servoing is proposed to address issues in the film production process such as uneven discharge leading to quality problems and wastage of resources.The visual detection module is based on machine vision and image semantic segmentation algorithms.By monitoring and recognizing the contour of the formed film using a camera,the image information of the plastic film's outer contour is extracted.Additionally,a midline fitting algorithm is proposed to calculate and analyze the asymmetry of the film,thereby detecting its thickness uniformity.The control module is based on dual-axis interpolation linear motion.With the asymmetry information and position information provided by the detection module,real-time control and feedback are performed on the gap adjustment mechanism of the film mouth on the XY moving platform equipped with two-axis servo motors,ensuring uniform discharge of the film and overall quality.The experimental results demonstrate that the designed system achieves a 97%confidence level in image processing,with a deviation recognition error of 0.485°and an interpolation control error of 0.098 mm,meeting the requirements of the system.

关 键 词：吹膜厚度均匀性 机器视觉 图像分割 伺服电机 插补控制 

分 类 号：TP242.6[自动化与计算机技术—检测技术与自动化装置]