关键词: 旋转电弧传感器；特征谐波；焊枪倾角；焊枪偏差

Abstract:

The problems of applying characteristic harmonic method to identify welding torch attitude based on rotational arc sensor were researched.A mathematical model was built to describe the relationship between arc length and welding torch attitude.The effect of welding torch deviation, welding torch inclination, and the angle between welding direction and welding seam direction to the detection results of using
characteristic harmonic method was proved in theory. It shows that the cosine component of first harmonic can be used to calculate welding torch deviation, and the sinusoidal component can be used to calculate welding torch inclination.The experimental results show that the measurement error of welding torch inclination is approximate ±7.77°,and the error of deviation is approximate ±0.69mm,that can be suited for real welding project.

Key words: rotational arc sensor;characteristic harmonic;welding torch inclination;welding torch deviation