Image Technology in Dimension Measurement of High Temperature Parts

圖像技術在高溫鍛件尺寸測量中的應用

畢超(Chao Bi) ； 張洋(Yang Zhang) ； 劉勇(Yong Liu) ； 徐昌語(Chang-Yu Xu)

《中國機械工程學刊》 35卷5期 (2014/10) Pp. 355-361

摘要

本文應用彩色CCD和紅外濾光片等搭建了高溫鍛件的尺寸測量平臺，採用數字濾光和物理濾光來提高鍛件的圖像品質，並應用比較測量法精確測量其二維尺寸。通過採集和處理標準量塊圖像標定出系統的圖元尺寸當量，經驗證，系統的橫向和縱向測量不確定度分別為0.0051mm和0.0087mm。在1000℃時採集45^#試驗件的圖像並進行解算，絕對誤差小於0.5mm，驗證了本文所提出的方法的實用性。

並列摘要

Color CCD and infrared filter are adopted to establish a measurement system of hot parts, whose images are improved by combination of digital and physical filtering technologies proposed in this paper. And then comparison measurement method is utilized to derive the two-dimensional size of the hot pieces precisely, which needs to calibrate the equivalent size of pixels in image accurately. So images of standard gauge blocks are captured and then processed to obtain the distance expressed in terms of pixels. As be verified by other gauge blocks, the horizontal measurement uncertainty is 0.0051mm, while vertical 0.0087mm. Finally, images of a 45^# steel cuboid at 1000℃ are captured and its dimensions are calculated through the procedure, which has a difference less than 0.5mm compared with the theoretical values, indicating the precision and practicality of the method proposed in this paper.

並列關鍵字

Vision measurement ； high temperature parts ； distortion correction ； sub-pixel edge detection