338
Y. Shi et al.
Fig. 10.19 Upper envelope of the filtered arc voltage signal [31]
Fig. 10.20 Frequency spectrum of upper envelope of the filtered arc voltage signal [31]
and the displacement of the fixed weld gun, the variation of L a is the effect of weld
pool oscillation.
Seven images of weld pool within 0.5 s are shown sequentially in Fig. 10.21. Due
to the reflection of light from an intense arc, the light area in the weld pool changes
Y. Shi et al.
Fig. 10.19 Upper envelope of the filtered arc voltage signal [31]
Fig. 10.20 Frequency spectrum of upper envelope of the filtered arc voltage signal [31]
and the displacement of the fixed weld gun, the variation of L a is the effect of weld
pool oscillation.
Seven images of weld pool within 0.5 s are shown sequentially in Fig. 10.21. Due
to the reflection of light from an intense arc, the light area in the weld pool changes