Spatter Dynamic Recognition and Feature Analysis During High-power Disk Laser Welding

u	Searching information database $S_{t} (u, v)$
1	Centroid abscissa x of initial spatter
2	Centroid ordinate y of initial spatter
3	Centroid ordinate y of initial spatter
4	Grayscale of initial spatter
5	Average grayscale of initial spatter
6	Radius of initial spatter
7	Speed of initial spatter
8	Variation of centroid abscissa x
9	Variation of centroid ordinate y
10	Number of initial spatter image frames
11	Centroid abscissa x of current spatter
12	Centroid ordinate y of current spatter
13	Area of current spatter
14	Grayscale of current spatter
15	Average grayscale of current spatter
16	Radius of current spatter
17	Speed of current spatter
18	Direction of spatter
19	Number of times the spatter appeared
20	Number of times the spatter disappeared

Table 2. Statistic of spatter volume of A, B, C regions
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Table 2. Statistic of spatter volume of A, B, C regions
Image sequence F Spatter volume/pixel Proportion of volume greater than 1 000 Proportion of volume greater than 500
A(601~800f) 19 482 1% 6.5%
B(1101~1300f) 32 376 3.5% 9%
C(1801~2000f) 28 580 2.5% 7.5%

Table 3. Statistic of spatter grayscale of A, B, C regions

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Table 3. Statistic of spatter grayscale of A, B, C regions

Image sequence F

Spatter grayscale

Proportion of grayscale greater than 35 000

Proportion of grayscale greater than 20 000

A(601~800f)

B(1 101~1 300f)

C(1 801~2 000f)

1 539 800

2 195 000

1 916 100

2.5%

6.5%

10.5%

17.5%

16%

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Yangjin LI, Xian FAN, Guanfu LONG, Nanfeng ZHANG, Yanxi ZHANG, Deyong YOU, Xiangdong GAO. Spatter Dynamic Recognition and Feature Analysis During High-power Disk Laser Welding[J]. Acta Photonica Sinica, 2021, 50(2): 208

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