基于DMA与改进GPC算法的超细缝合线直径控制技术  

Diameter Control Technology of Ultra-fine Sutures Based on DMA and Improved GPC Algorithm

作　　者：王德明 隋修武[1,2] 张杨[1,2] 万凯新 石峰 WANG Deming;SUI Xiuwu;ZHANG Yang;WAN Kaixin;SHI Feng(School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China;Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin Polytechnic University, Tianjin 300387, China)

机构地区：[1]天津工业大学机械工程学院,天津300387 [2]天津工业大学天津市现代机电装备技术重点实验室,天津300387

出　　处：《应用科学学报》2019年第3期349-358,共10页Journal of Applied Sciences

基　　金：天津市应用基础与前沿技术项目基金(No.15JCYBJC19700)资助

摘　　要：针对传统超细医用可吸收缝合线的线径检测速度慢、精度低,且因缝合线成形过程不易控制导致线径不均的问题,提出了一种适用于此类缝合线的快速测量与高精度控制方法,并设计了对应的控制系统.该系统基于嵌入式系统STM32,搭载线阵电荷耦合器件(charge-coupled device, CCD)图像传感器、14位CCD信号处理器AD9822、直接存储器访问(direct memory access, DMA)以及改进的自适应广义预测控制(generalized predictive control, GPC)算法.将该控制技术应用于JK1601型纺丝机上可以制作出了满足美国药典第32版要求的缝合线样本,且线径的均匀性从原来的74.6%提升到95%以上.In order to solve the problem of suture diameter inhomogeneity caused by slow and imprecise wire diameter detection and uncontrollable forming process, a control system is designed by a rapid measurement and accurate control method. The system, based on the embedded system STM32, consists of a linearly coupled charge-coupled device(CCD)image sensor, 14-bit CCD signal processor AD9822, direct memory access(DMA), and improved adaptive generalized predictive control(GPC) algorithm. The suture samples satisfying the requirements of the 32 th United States Pharmacopoeia Suture standard have been produced on the JK1601 spinning machine by the control system, and the uniformity of the wire diameter has increased from 74.6% to 95%.

关 键 词：超细医用可吸收缝合线 电荷耦合器件 AD9822 嵌入式系统 改进广义预测控制算法 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]