自适应优化控制的人工髋关节磨损三坐标测量及评估方法
发布时间：2018-09-08 14:12
【摘要】：针对目前三坐标测量在人工髋关节磨损评估上重复测量误差较大和准确性不高的突出问题,提出了一种自适应优化控制的人工髋关节三坐标测量及磨损评估方法。该方法包括臼杯表面采样点云分布的磨损自适应设计,测量点触测矢量的优化控制以及构建相同体积计算区域,并使用超高分子量聚乙烯(UHMWPE)髋臼杯对该方法进行了验证。研究结果表明:与非相同体积计算区域方法相比,在低于原来一半的测量成本下,体积评估重复性偏差减小了49.3%;与随机的触测矢量方法相比,在同样的点密度下,体积评估精度提高了32.4%~46.7%;该方法的磨损评估结果与称量法对照,表现出了有效的相关性(R2=0.922 8);与称量法相比,该方法表现出磨损分布统计分析能力,为人工关节磨损分析和研究提供了更多的信息。
[Abstract]:Aiming at the prominent problems of large error and low accuracy of repeated measurement in the evaluation of wear of artificial hip joint, an adaptive optimal control method for measuring and evaluating the wear of artificial hip joint is presented in this paper. The method includes the wear adaptive design of sampling point cloud distribution on the surface of cup, the optimal control of measuring point contact vector and the construction of the same volume calculation area. The method is verified by using (UHMWPE) acetabular cup of ultra high molecular weight polyethylene (UHMWPE). The results show that the repeatability deviation of volume evaluation decreases by 49.3 in comparison with the non-identical volume calculation region method at less than half of the original measurement cost, and at the same point density compared with the random touch vector method. The accuracy of volume evaluation was improved by 32.4% and 46.7%. Compared with the weighing method, the wear evaluation results of this method showed an effective correlation (R20.9022 8), and compared with the weighing method, the method showed the ability of statistical analysis of wear distribution. It provides more information for the analysis and research of artificial joint wear.
【作者单位】： 西安交通大学机械制造系统工程国家重点实验室;山东威高骨科材料有限公司;英国利兹大学医学生物研究所;天津医疗器械质量监督检验中心;
【基金】：国家科技支撑计划资助项目(2012BAI18B00,2012BAI22B01) 中央高校基本科研业务费专项资金资助项目
【分类号】：R318.1
本文编号：2230756
[Abstract]:Aiming at the prominent problems of large error and low accuracy of repeated measurement in the evaluation of wear of artificial hip joint, an adaptive optimal control method for measuring and evaluating the wear of artificial hip joint is presented in this paper. The method includes the wear adaptive design of sampling point cloud distribution on the surface of cup, the optimal control of measuring point contact vector and the construction of the same volume calculation area. The method is verified by using (UHMWPE) acetabular cup of ultra high molecular weight polyethylene (UHMWPE). The results show that the repeatability deviation of volume evaluation decreases by 49.3 in comparison with the non-identical volume calculation region method at less than half of the original measurement cost, and at the same point density compared with the random touch vector method. The accuracy of volume evaluation was improved by 32.4% and 46.7%. Compared with the weighing method, the wear evaluation results of this method showed an effective correlation (R20.9022 8), and compared with the weighing method, the method showed the ability of statistical analysis of wear distribution. It provides more information for the analysis and research of artificial joint wear.
【作者单位】： 西安交通大学机械制造系统工程国家重点实验室;山东威高骨科材料有限公司;英国利兹大学医学生物研究所;天津医疗器械质量监督检验中心;
【基金】：国家科技支撑计划资助项目(2012BAI18B00,2012BAI22B01) 中央高校基本科研业务费专项资金资助项目
【分类号】：R318.1
【参考文献】
相关期刊论文 前1条
1 崔长彩;蒋向前;;人工关节磨损测量方法综述[J];湖北汽车工业学院学报;2008年04期
，本文编号：2230756
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