基于机器视觉的聚焦换能器焦点快速定位研究  

Research on Fast Focus Location of Focused Transducer Based on Machine Vision

作　　者：彭圆 郑慧峰 董照诚 姚润广 PENG Yuan;ZHENG Hui-feng;DONG Zhao-cheng;YAO Run-guang(College of Metrology&Measurement Engineering,China Jiliang University,Hangzhou,Zhejiang 310018,China)

机构地区：[1]中国计量大学计量测试工程学院,浙江杭州310018

出　　处：《计量学报》2022年第10期1313-1318,共6页Acta Metrologica Sinica

基　　金：国家重点研发计划(2017YFF0205004);浙江省自然科学基金(LY17E050015、LQ20A040007);浙江省质量技术监督系统科研计划(20180103);浙江省‘仪器科学与技术’重中之重学科人才培育项目(JL150506);浙江省教育厅科研资助项目(Y201942513);浙江省大学生科研创新团队资助项目(2021R409052)。

摘　　要：提出一种基于机器视觉的聚焦换能器焦点快速定位方法,结合聚焦换能器的几何中心即焦点的特性,基于边缘连接的快速椭圆检测算法检测换能器边缘轮廓信息,从而得到焦点位置,通过坐标间的转换关系来计算机械臂坐标系下的焦点坐标,实现机械臂对换能器焦点的快速定位。对焦平面进行声场扫描得到换能器的实际焦点坐标以验证该方法所得焦点坐标准确性。实验结果表明:该方法所定位焦点在-3 dB实际焦点直径范围内定位准确。A method of fast focus location of focused transducer based on machine vision is proposed.According to the feature of the focused transducer s geometric center,the arc adjacency matrix-based fast ellipse detection connection algorithm detects the transducer s edge contour information,and then gets the focus position,the focus coordinate of the manipulator is calculated by the coordinate transformation relation,and the focus of the transducer can be located quickly by the manipulator.The focus coordinates of the transducer are obtained by scanning the sound field of the focal plane to verify the accuracy of the focus coordinates obtained by the method.The experimental results show that the focus of the method is in the range of-3 dB real focus diameter,which proves that the method is feasible.

关 键 词：计量学 聚焦换能器 焦点 机器视觉 快速定位 椭圆检测 

分 类 号：TB95[一般工业技术—计量学]