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    Journals >Laser & Optoelectronics Progress >Volume 55 >Issue 6 >Page 061101 > Article
    • Laser & Optoelectronics Progress
    • Vol. 55, Issue 6, 061101 (2018)
    Terahertz Nondestructive Detection Method of Ceramic Matrix Composites
    Tiejun Li1、2、1; 2; , Yue Sun1、1; , Guifang Shao、3*; *; , Weiren Shi1、1; , Jianjun Liu4、4; , and Shihan Yan5、5;
    Author Affiliations
  • 1 College of Automation, Chongqing University, Chongqing 400044, China
  • 2 College of Information Engineering, Jimei University, Xiamen, Fujian 361021, China
  • 4 School of Electronic Engineering, Jiujiang University, Jiujiang, Jiangxi 130061, China
  • 5 Research Center of THz Technology, Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences, Chongqing 400714, China
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    DOI: 10.3788/LOP55.061101 Cite this Article Set citation alerts
    Tiejun Li, Yue Sun, Guifang Shao, Weiren Shi, Jianjun Liu, Shihan Yan. Terahertz Nondestructive Detection Method of Ceramic Matrix Composites[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061101 Copy Citation Text show less
    API T-Ray 5000 THz transmission time domain spectral detection system. (a) Schematic; (b) physical map
    Fig. 1. API T-Ray 5000 THz transmission time domain spectral detection system. (a) Schematic; (b) physical map
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    Flow chart of THz nondestructive detection method based on multi-modes imaging and SIFT feature clustering
    Fig. 2. Flow chart of THz nondestructive detection method based on multi-modes imaging and SIFT feature clustering
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    Transmission spectra of samples. (a) Time domain; (b) frequency domain
    Fig. 3. Transmission spectra of samples. (a) Time domain; (b) frequency domain
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    Comparison among THz imaging results of Al2O3 sample under various imaging modes. (a) Optical images; (b) imaging from API system; (c) peak-peak value imaging; (d) average value imaging; (e) 0.20 THz imaging; (f) 0.34 THz imaging; (g) 0.76 THz imaging; (h) 1.30 THz imaging
    Fig. 4. Comparison among THz imaging results of Al2O3 sample under various imaging modes. (a) Optical images; (b) imaging from API system; (c) peak-peak value imaging; (d) average value imaging; (e) 0.20 THz imaging; (f) 0.34 THz imaging; (g) 0.76 THz imaging; (h) 1.30 THz imaging
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    Comparison among THz imaging results of AlN sample under various imaging modes. (a) Optical images; (b) imaging from API system; (c) peak-peak value imaging; (d) average value imaging; (e) 0.36 THz imaging; (f) 0.83 THz imaging; (g) 1.48 THz imaging; (h) 1.80 THz imaging
    Fig. 5. Comparison among THz imaging results of AlN sample under various imaging modes. (a) Optical images; (b) imaging from API system; (c) peak-peak value imaging; (d) average value imaging; (e) 0.36 THz imaging; (f) 0.83 THz imaging; (g) 1.48 THz imaging; (h) 1.80 THz imaging
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    Comparison among THz imaging results of BeO sample under various imaging modes. (a) Optical images; (b) imaging from API system; (c) peak-peak value imaging; (d) average value imaging; (e) 0.36 THz imaging; (f) 0.67 THz imaging; (g) 1.48 THz imaging; (h) 1.82 THz imaging
    Fig. 6. Comparison among THz imaging results of BeO sample under various imaging modes. (a) Optical images; (b) imaging from API system; (c) peak-peak value imaging; (d) average value imaging; (e) 0.36 THz imaging; (f) 0.67 THz imaging; (g) 1.48 THz imaging; (h) 1.82 THz imaging
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    Comparison among THz imaging results of ZrO2 sample under various imaging modes. (a)Optical images; (b) imaging from API system; (c) peak-peak value imaging; (d) average value imaging; (e) 0.24 THz imaging; (f) 0.29 THz imaging; (g) 0.37 THz imaging; (h) 0.46 THz imaging
    Fig. 7. Comparison among THz imaging results of ZrO2 sample under various imaging modes. (a)Optical images; (b) imaging from API system; (c) peak-peak value imaging; (d) average value imaging; (e) 0.24 THz imaging; (f) 0.29 THz imaging; (g) 0.37 THz imaging; (h) 0.46 THz imaging
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    Representative THz images of Al3O2 sample at different frequencies. (a) 0.86562 THz; (b) 0.88125 THz; (c) 0.91562 THz; (d) 0.85 THz; (e) 0.85312 THz; (f) 0.91875 THz; (g) 0.88437 THz; (h) 0.96875 THz
    Fig. 8. Representative THz images of Al3O2 sample at different frequencies. (a) 0.86562 THz; (b) 0.88125 THz; (c) 0.91562 THz; (d) 0.85 THz; (e) 0.85312 THz; (f) 0.91875 THz; (g) 0.88437 THz; (h) 0.96875 THz
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    Representative THz images of AlN sample at different frequencies. (a) 1.4844 THz; (b) 1.4969 THz; (c) 1.5 THz; (d) 1.5937 THz; (e) 1.4781 THz; (f) 1.5906 THz; (g) 1.3375 THz; (h) 1.1687 THz
    Fig. 9. Representative THz images of AlN sample at different frequencies. (a) 1.4844 THz; (b) 1.4969 THz; (c) 1.5 THz; (d) 1.5937 THz; (e) 1.4781 THz; (f) 1.5906 THz; (g) 1.3375 THz; (h) 1.1687 THz
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    Representative THz images of BeO sample at different frequencies. (a) 1.4781 THz; (b) 1.4719 THz; (c) 1.1969 THz; (d) 1.1937 THz; (e) 1.475 THz; (f) 1.1875 THz; (g) 1.4656 THz; (h) 1.4687 THz
    Fig. 10. Representative THz images of BeO sample at different frequencies. (a) 1.4781 THz; (b) 1.4719 THz; (c) 1.1969 THz; (d) 1.1937 THz; (e) 1.475 THz; (f) 1.1875 THz; (g) 1.4656 THz; (h) 1.4687 THz
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    Representative THz images of ZrO2 sample at different frequencies. (a) 0.31562 THz; (b) 0.38437 THz; (c) 0.2625 THz; (d) 0.32187 THz; (e) 0.35625 THz; (f) 0.3875 THz; (g) 0.39062 THz; (h) 0.325 THz
    Fig. 11. Representative THz images of ZrO2 sample at different frequencies. (a) 0.31562 THz; (b) 0.38437 THz; (c) 0.2625 THz; (d) 0.32187 THz; (e) 0.35625 THz; (f) 0.3875 THz; (g) 0.39062 THz; (h) 0.325 THz
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    Similarity cosine value distributions of images for four kinds of samples
    Fig. 12. Similarity cosine value distributions of images for four kinds of samples
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    SampleSDHAGSFPSNR /dB
    Al2O3(0.76 THz imaging)27.30296.31363.19636.783517.7804
    AlN(1.48 THz imaging)30.54936.29039.680517.089110.8352
    BeO(1.48 THz imaging)27.46786.49808.397314.58159.8233
    ZrO2(0.24 THz imaging)57.27626.51411.34612.73347.5815
    Table 1. Comparison among objective evaluation indexes for image quality
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    Tiejun Li, Yue Sun, Guifang Shao, Weiren Shi, Jianjun Liu, Shihan Yan. Terahertz Nondestructive Detection Method of Ceramic Matrix Composites[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061101
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