为解决换热翅片开窗角度的数字化测量问题,研究了面向换热器智能制造产线的翅片几何量参数测量装置。该装置采用激光轮廓传感器进行非接触测量,对获取的多组原始轮廓数据进行数据剔除和取均值预处理,将处理后的数据逐点求导以识别兴趣测量区域,在各兴趣测量区域采用定长逐点步进的方式进行最小二乘拟合运算,选取最优拟合线段进行夹角计算,可自动实现对翅片8个开窗角度及3个长度参数的测量,设计了基于JSON的数据交互格式实现与制造执行系统的数据对接。实验结果表明:装置角度测量最大允许误差(MPE)为±0.5°,具备数字化测量及数据交互能力,测量精度满足企业质控需求。
Abstract
For solving the problem of digitized measurement of heat exchanger fin opening angle, a fin geometry parameter measurement device for heat exchanger intelligent manufacturing system is developed. The laser profiler is used for non-contact measurement, firstly, the raw profile datas are pre-processed by data elimination and taking the mean value, then the processed data are derived point by point to identify the measurement area of interest, and the least squares fitting algorithm is carried out by fixed length point by point stepping in each area of interest, and the optimal fitting line segment is selected for the calculation of the angle, so that the measurement of eight opening angles and three lengths of the fins can be realized automatically. JSON-based data interaction format is designed to realize the data communication with the manufacturing execution system. The experimental results show that the maximum permissible error (MPE) of the device angle measurement is ±0.5°, it has digital measurement and data interaction capabilities, and the measurement accuracy meets the quality control needs of enterprises.
关键词
几何量计量;换热翅片;线轮廓处理;开窗角度 /
数字化测量 /
最小二乘法
Key words
geometric metrology /
heat exchange fin /
profile data processing /
opening angles /
digitized measurement /
least square
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基金
国家重点研发计划(2021YFF0600100);广东省市场监督管理局科技计划(2017PJ02)
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