作者：沈波波, 许嘉璐, 孔明
作者单位：中国计量大学计量测试工程学院, 浙江 杭州 310018
关键词：计算机视觉;四通阀;线结构光;三维测量
摘要：
为提高空调四通换向阀高度测量的精确度以及加工焊接的效率，提出一种基于线结构光的四通换向阀高度测量方法。通过计算机视觉技术搭配线型结构光获取四通阀的表面形貌特征，基于结构光三维测量原理得到被测工件表面各点的实际位置坐标，从而实现四通换向阀的高度测量。实验研究表明，线结构光法测量结果稳定，并能得到较高的精确度，所得高度的误差小于0.5 mm，满足零件的加工要求。该方法可完成物体表面轮廓的三维重建，克服单目视觉测量过程中丢失被测件深度信息的缺点；并能实现四通换向阀生产线上工件的自动化检测加工，因而避免传统人工测量引起的低效、易疲劳等问题。
Height measurement for air conditioner four-way reversing valve based on line structured light
SHEN Bobo, XU Jialu, KONG Ming
College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China
Abstract: A method of measuring the height of four-way reversing valve based on line structured light is proposed, which aims at improving the measurement precision of air conditioning four-way reversing valve and efficiency of processing welding. The surface shape features of the four-way valve are obtained by combining machine vision technology and line structured light, and the actual position coordinates of all spots on the surface of the measured workpiece are obtained based on the 3D measurement principle of the linear structured light, so as to achieve the height measurement for the four-way reversing valve. The test research shows that the results obtained in line structured light method are stable and highly accurate with height error less than 0.5mm, which meets the processing requirement of parts. The method can be used for 3D reconstruction of object surface, which avoids losing the depth information of measured parts in the monocular vision measurement. In addition, this method can realize the automatic detection and processing of the workpiece on the four-way reversing valve production line, which avoids the problems such as inefficiency and fatigue of the traditional manual measurement method.
Keywords: machine vision;four-way valve;line structured light;3D measurement
2018, 44(3): 33-37,43 收稿日期: 2017-05-19;收到修改稿日期: 2017-07-20
基金项目: 国家自然科学基金（51375467，11404312）；浙江省自然科学基金（LY15E050014）；浙江省仪器科学与技术重中之重学科开放基金（JL150508）
作者简介: 沈波波(1993-),男,浙江杭州市人,硕士研究生,专业方向为测试计量技术与仪器。
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