微型直流电机端盖装配质量在线视觉检测技术

On-line visual inspection technology for the assembly quality of miniature direct current motor bearing support

针对目前微型直流电机端盖装配质量采用人工目视检测,存在主观程度高、信息化程度低的问题,该文提出基于区域推荐型卷积神经网络(R-CNN, region-convolutional neural networks)的微型直流电机端盖装配质量在线视觉检测技术。首先,应用Faster R-CNN目标检测方法,实现机壳冲压脚、正极、负极等端盖关键制造质量特征的识别与定位;根据电机型号对应的端盖装配质量需求,统计端盖上关键质量特征类型与数量(如机壳冲压脚及电机正极、负极、引线及插座等),从零部件安装到位、冲压脚齐全、正极正确涂装三方面评价微型直流电机端盖装配质量。初步实验表明,该文方法可实现微型直流电机制造过程不同规格尺寸微型直流电机端盖装配质量视觉检测,单个电机检测时间不超过0.21 s,满足微型直流电机端盖装配质量在线视觉检测需求。

For the current motor bearing support assembly quality using manual visual inspection, there is a high degree of subjectivity, low degree of information technology problems. In this paper, an online visual inspection technology based on region-convolutional neural networks(R-CNN) for the assembly quality of miniature direct current(DC) motor bearing support is proposed. Firstly, the Faster R-CNN object detection method is applied to identify and locate the key manufacturing quality features on the bearing support, such as the stamping feet, positive pole, negative pole, lead and socket, etc. The quality of the bearing support assembly of the miniature DC motor is evaluated in terms of the installation of parts in place, the complete stamping feet and the correct painting of the positive pole. The test proves that this method can achieve visual inspection of the assembly quality of miniature DC motor bearing support of different sizes during the manufacturing process of miniature DC motors, and the inspection time of a single motor does not exceed 0.21 s,meeting the demand for online visual inspection of the assembly quality of miniature DC motor bearing support.