Infrared Thermography Detection and Images Sequence Processing for Defects in Photovoltaic Cells

Chiwu Bu; Tao Liu; Rui Li; Guozeng Liu; Qingju Tang

doi:10.3788/AOS202242.0711002

Acta Optica Sinica, Volume. 42, Issue 7, 0711002(2022)

Infrared Thermography Detection and Images Sequence Processing for Defects in Photovoltaic Cells

Chiwu Bu^1、*, Tao Liu^1、**, Rui Li¹, Guozeng Liu², and Qingju Tang³

Author Affiliations

¹College of Light Industry, Harbin University of Commerce, Harbin, Heilongjiang 150028, China

²School of Astronautics, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China

³School of Mechanical Engineering, Heilongjiang University of Science and Technology, Harbin, Heilongjiang 150022, China

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Figures & Tables(7)

Fig. 1. Polysilicon photovoltaic cells with different types of defects. (a) S1; (b) S2; (c) S3; (d) S4; (e) S5; (f) S6

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Fig. 2. Schematic of PEIT imaging system

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Fig. 3. Recognition results of defects by different algorithms. (a) PCA algorithm; (b) FCC algorithm; (c) LDA algorithm; (d) QDA algorithm

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Fig. 4. Selection of defect area and non-defect area

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Table 1. Evaluation results of R_SN
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Table 1. Evaluation results of R_SN
Algorithm S1 S2 S3 S4 S5 S6
PCA 2.5779 19.6446 6.9246 12.9456 2.9929 -
FCC 3.1326 10.8094 7.0086 5.2269 2.4340 -
LDA 8.1083 21.5520 12.3934 31.8251 6.3424 -
QDA 12.1634 28.4106 18.2020 53.4575 10.9035 -

Table 2. Evaluation results of I_EN
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Table 2. Evaluation results of I_EN
Algorithm S1 S2 S3 S4 S5 S6
PCA 2.3855 2.3688 2.5283 2.6806 2.7746 2.4988
FCC 2.4406 2.3328 2.7687 2.5799 2.6387 1.6379
LDA 2.7464 2.7937 2.8936 2.8946 3.5635 2.7229
QDA 3.6286 3.7023 3.6811 3.7270 3.6857 3.5575

Table 3. Evaluation results of M_SE

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Table 3. Evaluation results of M_SE

Algorithm	S1	S2	S3	S4	S5	S6
PCA	34.6533	57.6182	61.9331	49.9350	56.3752	52.2431
FCC	48.6738	71.5896	67.6298	47.5954	42.6735	70.0350
LDA	46.3230	102.6936	68.8733	60.5816	58.0018	93.6639
QDA	70.0355	104.0104	74.3880	72.4957	68.2088	94.5781

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Chiwu Bu, Tao Liu, Rui Li, Guozeng Liu, Qingju Tang. Infrared Thermography Detection and Images Sequence Processing for Defects in Photovoltaic Cells[J]. Acta Optica Sinica, 2022, 42(7): 0711002

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