针对工业现场铜制螺纹零件外表面缺陷检测效率低和精度差的问题,提出一种融合多尺度特征与注意力的U型网络(Multi-Scale Features and Attention Fused UNet,MFA-UNet)模型的铜制螺纹零件外表面缺陷检测算法。首先,设计一种双路下采样模...针对工业现场铜制螺纹零件外表面缺陷检测效率低和精度差的问题,提出一种融合多尺度特征与注意力的U型网络(Multi-Scale Features and Attention Fused UNet,MFA-UNet)模型的铜制螺纹零件外表面缺陷检测算法。首先,设计一种双路下采样模块,并行使用普通卷积和空洞卷积提升模型的特征提取能力;其次,在跳跃连接部分加入复合空间注意力模块,增强分割模型对空间信息和边缘信息的提取能力;然后,在上采样过程中加入压缩激励模块,提高模型的表达能力和特征选择能力;最后,提出一种相似度对比算法,比较分割图像和掩码图像的相似度,得到缺陷检测结果。实验表明,所提分割模型在铜制螺纹零件缺陷检测数据集上PA指标达到94.81%,MIoU指标达到93.78%;所提算法缺陷检测准确率达到98.9%,满足工业现场的使用需求。展开更多
Taking high speed rotating shaft parts as the research object,the general fault mode of the parts is analyzed.The analysis process of shaft parts is expounded by means of finite element analysis method.A variety of fa...Taking high speed rotating shaft parts as the research object,the general fault mode of the parts is analyzed.The analysis process of shaft parts is expounded by means of finite element analysis method.A variety of fatigue life prediction methods for mechanical equipment parts are reviewed in this paper.And the selection and calculation method of parameters in the life prediction model of shaft parts are summarized.Finally,taking a gear shaft of a reducer as an example,the Morrow linear correction of the elastic stress model,Manson-Halford(M-H)correction model and Smith Watson Topper(SWT)correction model are applied to fatigue life assessments.The prediction results of the SWT correction model are relatively conservative.The prediction results of the Morrow linear correction of the elastic stress model and the M-H model are similar,and they are larger than the SWT correction model.展开更多
文摘针对工业现场铜制螺纹零件外表面缺陷检测效率低和精度差的问题,提出一种融合多尺度特征与注意力的U型网络(Multi-Scale Features and Attention Fused UNet,MFA-UNet)模型的铜制螺纹零件外表面缺陷检测算法。首先,设计一种双路下采样模块,并行使用普通卷积和空洞卷积提升模型的特征提取能力;其次,在跳跃连接部分加入复合空间注意力模块,增强分割模型对空间信息和边缘信息的提取能力;然后,在上采样过程中加入压缩激励模块,提高模型的表达能力和特征选择能力;最后,提出一种相似度对比算法,比较分割图像和掩码图像的相似度,得到缺陷检测结果。实验表明,所提分割模型在铜制螺纹零件缺陷检测数据集上PA指标达到94.81%,MIoU指标达到93.78%;所提算法缺陷检测准确率达到98.9%,满足工业现场的使用需求。
基金National Natural Science Foundation of China(No.71761030)
文摘Taking high speed rotating shaft parts as the research object,the general fault mode of the parts is analyzed.The analysis process of shaft parts is expounded by means of finite element analysis method.A variety of fatigue life prediction methods for mechanical equipment parts are reviewed in this paper.And the selection and calculation method of parameters in the life prediction model of shaft parts are summarized.Finally,taking a gear shaft of a reducer as an example,the Morrow linear correction of the elastic stress model,Manson-Halford(M-H)correction model and Smith Watson Topper(SWT)correction model are applied to fatigue life assessments.The prediction results of the SWT correction model are relatively conservative.The prediction results of the Morrow linear correction of the elastic stress model and the M-H model are similar,and they are larger than the SWT correction model.
