基于工业CT的多层环状缠绕复合材料层厚检测方法研究
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摘要
针对多层环状缠绕复合材料层厚测量问题,提出了一种基于工业CT技术的层厚快速测量方法。依据环形构件截面CT图像特点,利用两条弦线快速确定环形构件圆心,并采用半高法确定工业CT图像上不同材质的边界,根据灰度曲线计算出半径方向的复合材料层厚。设计了一种双层环状对比标样,利用本文提出的方法实现了对标样层厚的测量,并与三坐标测量结果进行了比较分析。研究结果表明,本文提出的方法可以实现多层环状复合材料构件任意层厚的快速测量,对环状对比标样层厚测量的相对误差在1%以内。
Focusing on the multi-slice winding composite laminate' thickness measurement,a fast thickness measurement method based on industrial CT technology was proposed. Based on the characteristics of the CT image of annular component section,at first the circle center of the annular component was quickly determined by using two strings. Then,the boundary of different materials in industrial CT image was determined by half-height method.Finally,the thickness of composite material along radius direction is calculated according to the gray curve variation.A double-layer annular contrast standard sample was tested,the thickness measurement of the standard sample was realized by using the proposed method of this paper,and the results were compared with the three-coordinate system's measurement results. The comparisons proved that the proposed method of this paper can realize the rapid measurement of arbitrary layer thickness of multi-layer annular composite components,and the maximum relative error is less than 1% for the measurement of annular contrast standard sample thickness.
Focusing on the multi-slice winding composite laminate' thickness measurement,a fast thickness measurement method based on industrial CT technology was proposed. Based on the characteristics of the CT image of annular component section,at first the circle center of the annular component was quickly determined by using two strings. Then,the boundary of different materials in industrial CT image was determined by half-height method.Finally,the thickness of composite material along radius direction is calculated according to the gray curve variation.A double-layer annular contrast standard sample was tested,the thickness measurement of the standard sample was realized by using the proposed method of this paper,and the results were compared with the three-coordinate system's measurement results. The comparisons proved that the proposed method of this paper can realize the rapid measurement of arbitrary layer thickness of multi-layer annular composite components,and the maximum relative error is less than 1% for the measurement of annular contrast standard sample thickness.
引文
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[2]郭东明,姚宝国,徐志祥,等.天线罩几何参数测量控制系统研究[J].大连理工大学学报,2000,40(5):573-576.
[3]陈娟,苏璐,侯志灵.超声波测量管道壁厚[J].电子测量技术,2012,23(9):1025-1028.
[4]廖民飞,史素梅.探讨管道壁厚准确测量方法[J].中国锅炉压力容器安全,2000,17(1):27-29.
[5]周宝珑.铁路罐车壁厚超声检测的应用[J].铁道技术监督,2015,43(8):3-6.
[6]方伟,罗华权,何跃.管道钢管壁厚超声波检测技术[J].焊管,2015,38(2):56-59.
[7]王健,傅迎光,孙明璇,等.基于脉冲涡流检测技术的铁磁性材料厚度的测量[J].北京交通大学学报,2012,36(6):133-136.
[8]吴鑫,李方奇,石坤,等.脉冲涡流测厚技术理论与应用[J].北京交通大学学报,2009,33(1):20-23.
[9]张莉,丛鹏.工业CT反向工程测量涡轮叶片壁厚方法[J].核电子学与探测技术,2015,35(5):503-505.
[10]王庆胜,张定华,程云勇,等.基于ICT切片图像的航空发动机涡轮叶片壁厚检测[J].计算机工程与应用,2005,41(2):203-204.
[11]邹永宁,陈旭峰,王珏.工业CT图像的二维几何测量方法研究[J].核电子学与探测技术,2010,30(8):1026-1030.
[12]傅健,路宏年,侯涛,等.基于ICT图像的航空发动机涡轮叶片壁厚尺寸精密测量方法[J].航空学报,2005,2(3):325-330.
[13]程云勇,张定华,卜昆,等.基于工业测量数据的空心涡轮叶片三维壁厚分析[J].机械强度,2009,31(5):791-796.
[14]陈平,潘晋孝,刘宾. CT图像边缘退化模型的建立及其在图像尺寸测量中的应用[J].光学精密工程,2009,17(9):2269-2275.
[15]Sheep L A,Logan B F. The fourier reconstruction of a head section[J]. IEEE Trans. Nucl. Sci.,1974,21(3):21-34.
[16]王倩妮,苏宇航,郭广平.基于工业CT图像的空心涡轮叶片壁厚测量方法[J].无损检测,2015,37(6):29-32.
[17]苏宇航,王倩妮,张于北.航空发动机叶片高能工业CT壁厚测量数据自动校准方法[C]//第十界无损检测学会年会论文集. 874-878.
[18]刘金钢,卜昆,杨小宁.基于中弧线的空心涡轮叶片壁厚计算方法研究[J].中国机械工程,2012,23(9):1025-1028.