高温数字图像相关方法中的制斑和图像处理技术
|
摘要
结合数字图像相关(digital image correlation,DIC)方法高温应用的需求,该文重点对散斑制备技术和高温散斑图像处理技术进行了研究。首先,以高温结构材料为对象,研发了一种基于参数化模板的高温散斑制作工艺。该工艺基于参数化模板,可调整模板中散斑颗粒大小、分布密度和分布随机度等多个参数,成功地在C-SiC复合材料基底上制备出可耐1 200℃高温散斑载体。其次,分析了热气流、热辐射对DIC测量结果的影响,结合图像灰度平均方法、循环高温炉外热气流和光学滤波法等3种手段进行高温散斑图像的修正,并通过热膨胀系数测量实验验证了修正方法的可行性。
According to requirement of the high-temperature application from the digital image correlation(DIC)method,the speckle fabrication methods and high-temperature speckle image processing technique are studied in this paper. Taking high-temperature structural materials as the studied objects,a high-temperature speckle fabrication technique based on parametric template is developed.The technique is mainly based on a parametric template,which can adjust the parameters such as particle size,distribution density,and randomness in the template.As a result,the quality of the speckle can be optimized.A high-temperature speckle pattern was successful fabricated on the C-SiC composite substrate by the proposed technique,and the experiment verifies the speckle carrier can endure high temperature up to 1 200℃.At the same time,the influence factors of thermal disturbance and thermal radiation on DIC measurement results are analyzed. The high-temperature speckle images are corrected with approaches of image grayscale-average,circulating thermal disturbance and optical filtering method.And a test for measuring the thermal expansion coefficient is designed to verify the feasibility of the correction methods.
According to requirement of the high-temperature application from the digital image correlation(DIC)method,the speckle fabrication methods and high-temperature speckle image processing technique are studied in this paper. Taking high-temperature structural materials as the studied objects,a high-temperature speckle fabrication technique based on parametric template is developed.The technique is mainly based on a parametric template,which can adjust the parameters such as particle size,distribution density,and randomness in the template.As a result,the quality of the speckle can be optimized.A high-temperature speckle pattern was successful fabricated on the C-SiC composite substrate by the proposed technique,and the experiment verifies the speckle carrier can endure high temperature up to 1 200℃.At the same time,the influence factors of thermal disturbance and thermal radiation on DIC measurement results are analyzed. The high-temperature speckle images are corrected with approaches of image grayscale-average,circulating thermal disturbance and optical filtering method.And a test for measuring the thermal expansion coefficient is designed to verify the feasibility of the correction methods.
引文
[1]杨亚政,李松年,杨嘉陵.高超音速飞行器及其关键技术简论[J].力学进展,2007,37(4):537-550.YANG Y Z,LI S N,YANG J L.A review on hypersonic vehicles and key technologies[J].Advances in Mechanics,2007,37(4):537-550.(in Chinese)
[2]王伟.数字图像相关方法在热结构材料高温变形测试中的应用[D].哈尔滨:哈尔滨工业大学,2014.WANG W. The application of digital image correlation method on high-temperature deformation test of thermal structure material[D]. Harbin:Harbin Institute of Technology,2014.(in Chinese)
[3]潘兵.数字图像相关方法及其在实验力学中的应用[D].北京:清华大学,2007.PAN B. Research on digital image correlation with its application in experimental mechanics[D].Beijing:Tsinghua University,2007.(in Chinese)
[4]潘兵,吴大方,高镇同,等.1200℃高温热环境下全场变形的非接触光学测量方法研究[J].强度与环境,2011,38(1):52-59.PAN B,WU D F,GAO Z T,et al.Study of non-contact optical metrology for full-field deformation measurement at 1200℃[J].Structure&Environment Engineering,2011,38(1):52-59.(in Chinese)
[5] GUO X,LIANG J,TANG Z Z,et al.High-temperature digital image correlation method for full-field deformation measurement captured with filters at 2600°C using spraying to form speckle patterns[J]. Optical Engineering,2014,53(6),063101.
[6] DONG Y L,PAN B.A review of speckle pattern fabrication andassessmentfordigitalimagecorrelation[J].Experimental Mechanics,2017,57(8):1161-1181.
[7] LYONS J S,LIU J,SUTTON M A.High-temperature deformation measurements using digital-image correlation[J].Experimental Mechanics,1996,36(1):64-70.
[8]潘兵,吴大方.基于带通滤波成像的高温数字图像相关方法[J].光学学报,2011,31(2),0212001.PAN B,WU D F.High-temperature digital image correlation method based on optical band-pass filtering imaging[J].Acta Optica Sinica,2011,31(2),0212001.(in Chinese)
[9]苏勇,张青川.数字图像相关的噪声导致系统误差及散斑质量评价标准[J].实验力学,2017,32(5),699-717.SU Y,ZHANG Q C.Noise-induced bias and evaluation criterion of speckle quality in digital image corelation[J].Journal of Experimental Mechanics,2017,32(5),699-717.(in Chinese)
[10]潘兵,吴大方,夏勇.数字图像相关方法中散斑图的质量评价研究[J].实验力学,2010,25(2):120-129.PAN B,WU D F,XIA Y.Study of speckle pattern quality assessment used in digital image correlation[J].Journal of ExperimentalMechanics, 2010, 25(2):120-129.(in Chinese)
[11]PAN B,WU D F,WANG Z Y,et al.High-temperature digital image correlation method for full-field deformation measurement at 1200°C[J]. Measurement Science and Technology,2011,22(1),015701.
[12]SU Y Q,YAO X F,WANG S,et al.Improvement on measurementaccuracyofhigh-temperatureDICby grayscale-average technique[J]. Optics and Lasers in Engineering,2015,75:10-16.
[13]吴立夫.基于双棱镜的单相机三维数字图像相关方法的研究[D].北京:清华大学,2017.WU L F. Research on the bi-prism-based single lens three-dimensional digital image correlation method[D].Beijing:Tsinghua University,2017.(in Chinese)
[14]杨娇.热障涂层高温CMAS腐蚀应变场的DIC表征与分析[D].湘潭:湘潭大学,2016.YANG J.Strain characterization and analysis of thermal barrier coatings induced by molten cmas using DIC[D].Xiangtan:Xiangtan University,2016.
[15]EVANGELIDIS G D,PSARAKIS E Z.Parametric image alignment using enhanced correlation coefficient maximization[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,2008,30(10):1858-1865.
[16]陈静静.基于高速DIC方法的脆性材料动态力学性能研究[D].北京:北京理工大学,2014.CHEN J J.Study on the dynamic mechanical properties of brittle materials by high-speed DIC[D].Beijing:Beijing Institute of Technology,2014.(in Chinese)
[17]JONES E M C,REU P L.Distortion of digital image correlation(DIC)displacements and strains from heat waves[J].Experimental Mechanics,2018,58(7):1133-1156.
[18]RYBICKI G B,LIGHTMAN A P.Radiative processes in astrophysics[M].New York:Wiley,1979.
[19]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.金属材料热膨胀特征参数的测定:GB/T4339-2008[S].北京:中国标准出版社,2009.General Administration of Quality Supervision,Inspection and Quarantine of the Peoples Republic of China,Standardization Administration of the Peoples Republic of China.Test methods for thermal expansion characteristic parameters of metallic materials:GB/T 4339-2008[S].Beijing:Standards Press of China,2009.(in Chinese)
[20]《中国航空材料手册》编辑委员会.中国航空材料手册(第2卷)[M].北京:中国标准出版社,2001.Editorial Committee of China Aeronautical Materials Handbook.China Aeronautical Materials Handbook(Vol.2)[M].Beijing:China Standards Press,2001.(in Chinese)
[2]王伟.数字图像相关方法在热结构材料高温变形测试中的应用[D].哈尔滨:哈尔滨工业大学,2014.WANG W. The application of digital image correlation method on high-temperature deformation test of thermal structure material[D]. Harbin:Harbin Institute of Technology,2014.(in Chinese)
[3]潘兵.数字图像相关方法及其在实验力学中的应用[D].北京:清华大学,2007.PAN B. Research on digital image correlation with its application in experimental mechanics[D].Beijing:Tsinghua University,2007.(in Chinese)
[4]潘兵,吴大方,高镇同,等.1200℃高温热环境下全场变形的非接触光学测量方法研究[J].强度与环境,2011,38(1):52-59.PAN B,WU D F,GAO Z T,et al.Study of non-contact optical metrology for full-field deformation measurement at 1200℃[J].Structure&Environment Engineering,2011,38(1):52-59.(in Chinese)
[5] GUO X,LIANG J,TANG Z Z,et al.High-temperature digital image correlation method for full-field deformation measurement captured with filters at 2600°C using spraying to form speckle patterns[J]. Optical Engineering,2014,53(6),063101.
[6] DONG Y L,PAN B.A review of speckle pattern fabrication andassessmentfordigitalimagecorrelation[J].Experimental Mechanics,2017,57(8):1161-1181.
[7] LYONS J S,LIU J,SUTTON M A.High-temperature deformation measurements using digital-image correlation[J].Experimental Mechanics,1996,36(1):64-70.
[8]潘兵,吴大方.基于带通滤波成像的高温数字图像相关方法[J].光学学报,2011,31(2),0212001.PAN B,WU D F.High-temperature digital image correlation method based on optical band-pass filtering imaging[J].Acta Optica Sinica,2011,31(2),0212001.(in Chinese)
[9]苏勇,张青川.数字图像相关的噪声导致系统误差及散斑质量评价标准[J].实验力学,2017,32(5),699-717.SU Y,ZHANG Q C.Noise-induced bias and evaluation criterion of speckle quality in digital image corelation[J].Journal of Experimental Mechanics,2017,32(5),699-717.(in Chinese)
[10]潘兵,吴大方,夏勇.数字图像相关方法中散斑图的质量评价研究[J].实验力学,2010,25(2):120-129.PAN B,WU D F,XIA Y.Study of speckle pattern quality assessment used in digital image correlation[J].Journal of ExperimentalMechanics, 2010, 25(2):120-129.(in Chinese)
[11]PAN B,WU D F,WANG Z Y,et al.High-temperature digital image correlation method for full-field deformation measurement at 1200°C[J]. Measurement Science and Technology,2011,22(1),015701.
[12]SU Y Q,YAO X F,WANG S,et al.Improvement on measurementaccuracyofhigh-temperatureDICby grayscale-average technique[J]. Optics and Lasers in Engineering,2015,75:10-16.
[13]吴立夫.基于双棱镜的单相机三维数字图像相关方法的研究[D].北京:清华大学,2017.WU L F. Research on the bi-prism-based single lens three-dimensional digital image correlation method[D].Beijing:Tsinghua University,2017.(in Chinese)
[14]杨娇.热障涂层高温CMAS腐蚀应变场的DIC表征与分析[D].湘潭:湘潭大学,2016.YANG J.Strain characterization and analysis of thermal barrier coatings induced by molten cmas using DIC[D].Xiangtan:Xiangtan University,2016.
[15]EVANGELIDIS G D,PSARAKIS E Z.Parametric image alignment using enhanced correlation coefficient maximization[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,2008,30(10):1858-1865.
[16]陈静静.基于高速DIC方法的脆性材料动态力学性能研究[D].北京:北京理工大学,2014.CHEN J J.Study on the dynamic mechanical properties of brittle materials by high-speed DIC[D].Beijing:Beijing Institute of Technology,2014.(in Chinese)
[17]JONES E M C,REU P L.Distortion of digital image correlation(DIC)displacements and strains from heat waves[J].Experimental Mechanics,2018,58(7):1133-1156.
[18]RYBICKI G B,LIGHTMAN A P.Radiative processes in astrophysics[M].New York:Wiley,1979.
[19]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.金属材料热膨胀特征参数的测定:GB/T4339-2008[S].北京:中国标准出版社,2009.General Administration of Quality Supervision,Inspection and Quarantine of the Peoples Republic of China,Standardization Administration of the Peoples Republic of China.Test methods for thermal expansion characteristic parameters of metallic materials:GB/T 4339-2008[S].Beijing:Standards Press of China,2009.(in Chinese)
[20]《中国航空材料手册》编辑委员会.中国航空材料手册(第2卷)[M].北京:中国标准出版社,2001.Editorial Committee of China Aeronautical Materials Handbook.China Aeronautical Materials Handbook(Vol.2)[M].Beijing:China Standards Press,2001.(in Chinese)