ICT辅助涡轮叶片内冷通道多余物检测方法

杨民; 孙晶晶; 李兴东; 魏东波

ICT辅助涡轮叶片内冷通道多余物检测方法

基金项目: 国家自然科学基金(60872080,61077011); 国家科技支撑项目(2011BAI02B02)

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出版历程
- 收稿日期: 2010-11-17
- 修回日期: 2011-06-29
- 刊出日期: 2011-11-28

ICT assisted detection for remainders in the internal cooling channel of the turbine blade

摘要

摘要: 为了实现涡轮叶片内冷通道多余物的无损检测与高精度提取,以工业计算机断层扫描技术为检测手段,基于刚性变换与正弦投影之间的关系,求得待测试件与标准试件断层图像方位上的位移参数,对测试件断层正弦图与标准件对应断层正弦图进行配准,提取出多余物正弦图并重建出多余物断层图像.实验证明该方法能有效识别出叶片内冷通道内的多余物,相比传统的基于CT(computed tomography)图像的多余物提取算法,该算法在投影域内进行,不受投影数据不完全、扫描系统偏差以及重建伪影的影响,具有更高的准确性.
- 多余物 /
- 工业计算机断层扫描(ICT) /
- 涡轮叶片 /
- 图像配准 /
- X-射线检测
Abstract: In order to detect remainders in the internal cooling channels by non-destructive means with high accuracy,industrial computed tomography was used to scan the tested blade.The position displacement parameters between the tested blade and the standard specimen were calculated base on the rigid transformation and sinogram projection.Then the sinograms of the scanned slice and the corresponding standard slice were matched together in order to extract the sinogram of the remainders and the reconstructed images of them were obtained.The experimental results prove that this method can extract remainders in the internal cooling channels effectively.Compared to the traditional remainder extraction algorithm based on CT(computed tomography) image,the proposed algorithm is realized in the projection domain,and it is rarely affected by projection data incompleteness,scanning system bias and the reconstruction artifacts,so it has a higher accuracy.
- remainder /
- industrial computed tomography (ICT) /
- turbine blade /

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参考文献(12)

[1]	倪萌,朱惠人,裘云,等.航空发动机涡轮叶片冷却技术综述[J].燃气轮机技术,2005,18(4):25-32. NI Meng,ZHU Huiren,QIU Yun,et al.Review of aero-turbine blade cooling technologies[J].Gas Turbine Technology,2005,18(4):25-32.(in Chinese)
[2]	苏生,胡捷,刘建军,等.内部结构对空冷叶片换热性能的影响[J].热能动力工程,2008,23(6):567-571. SU Sheng,HU Jie,LIU Jianjun,et al.The influence of inner structures on the heat exchange performance of air-cooled blades[J].Journal of Engineering for Thermal Energy and Power,2008,23(6):567-571.(in Chinese)
[3]	孔凡琴,路宏年.基于数字射线成像的航空发动机涡轮叶片缺陷尺寸的自动测定[J].兵工学报,2005,26(3):335-337. KONG Fanqin,LU Hongnian.The measuration to the defection on the turbine-vane of the aeroengine based on the digital radiography[J].Acta Armamentarii,2005,26(3):335-337.(in Chinese)
[4]	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,2006,27(2):326-330. FU Jian,LU Hongnian,HOU Tao,et al.Wall thickness precision measurement method for air engine turbine blade based on ICT images[J].Acta Aeronautica et Astronautica Sinica,2006,27(2):326-330.(in Chinese)
[5]	杨民,孙翠丽,戚琦.基于3D-ICT图像的涡轮叶片形面点云高精度提取技术[J].计算机辅助设计与图形学学报,2007,19(9):1212-1217. YANG Min,SUN Cuili,QI Qi.The method of extracting surface point cloud of the turbine blade with high accuracy based on 3D-ICT images[J].Journal of Computer-Aided Design & Computer Graphics,2007,19(9):1212-1217.(in Chinese)
[6]	Fitchard E.Registration of synthetic tomographic projection data sets using cross-correlation[J].Physics in Medicine and Biology,1998,43(6):1645-1657.
[7]	Fitchard E.Registration using tomographic projection files[J].Physics in Medicine and Biology, 1999,44(2):495-507.
[8]	Mao W H,Li T F,Wink N.CT image registration in sinogram space[J].Medical Physics,2007,34(9):3596-602.
[9]	李保磊,傅健,黄巧珍,等.基于正弦图的工业CT系统转台旋转中心的自动确定方法[J].航空学报,2009,30(7):1341-1345. LI Baolei,FU Jian,HUANG Qiaozhen,et al.Method for automatic determination of center of rotation in industrial computed tomography systems based on sinogram[J].Acta Aeronautica et Astronautica Sinica,2009,30(7):1341-1345.(in Chinese)
[10]	邹晓兵,曾理.重排的半覆盖螺旋锥束CT的反投影滤波重建[J].光学精密工程,2010,18(9):2077-2084. ZOU Xiaobing,ZENG Li.Rebinned BPF reconstruction for helical cone-beam CT with half-cover scaning[J].Optics and Precision Engineering,2010,18(9):2077-2084.(in Chinese)
[11]	万磊 ,白洪亮,戴军.扩展的Otsu最优阈值图像分割的实现方法[J].哈尔滨工程大学学报,2003,24(3):326-329. WAN Lei,BAI Hongliang,DAI Jun.Extended optimal Otsu thresholding method of image segmention[J].Journal of Harbin Engineering University,2003,24(3):326-329.(in Chinese)
[12]	Ramakrishna R,Muralidhar K,Munshi P.Beam-hardening in simulated X-ray tomography[J].NDT & E International, 2006,39(6):449-457.