提出了一種適合于回轉體刀具———鉆頭的激光視覺三維形貌測試系統(tǒng),介紹了系統(tǒng)的組成和測量原理,討論了系統(tǒng)中由于安裝的傾斜和偏心等引起的測量光束不共面和多組測量數(shù)據(jù)不同心等問題。重點研究了將傳感器坐標系中的測量數(shù)據(jù)轉換到鉆頭坐標系中的標定方法,并對鉆頭中有標準圓和沒有標準圓來確定旋轉中心兩種情況進行了討論。實驗結果表明:用本標定方法對鉆頭和標準圓橫截面的形貌數(shù)據(jù)進行計算,其直徑測量精度可達到10～20μm。
關鍵詞: 　結構光; 鉆頭; 標定; 三維形貌
Abstract : A laser vision 32D measurement system for drill geometry is presented . The principle and the measure2 ment system are described. There are two problems caused by the tilt and the eccentricity of the system , which caused different groups of the measurement data in one cross section not being in one surface and with different centers. The methods for solving the problems are analyzed. The calibration method for translating the raw data of sensor coordinate in2 to drill coordinate system is studied in detail. The two conditions for calibration and data merging with and without stan2 dard circle as reference are discussed. The experiment results show that the accuracy of diameter measurement of cross section of standard bar and drill flute is in the range of 10～20μm.
Key words : Structure light ; Drill ; Calibration ; 32D geometry