旋转电弧传感角焊缝信号滤波研究  

Research on Fillet Weld Signal Filtering of Rotating Arc Sensing

作　　者：毛志伟[1] 曾雷 周少玲[2] MAO Zhiwei;ZENG Lei;ZHOU Shaoling(School of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031,China;Jiangxi Industry Polytechnic College,Nanchang 330095,China)

机构地区：[1]南昌大学机电工程学院,江西南昌330031 [2]江西工业职业技术学院,江西南昌330095

出　　处：《热加工工艺》2021年第3期120-124,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51265036)。

摘　　要：针对含短路抑制的旋转电弧信号,为提高电流信号信噪比,提出了一种组合滤波方法。首先,在电流信号中运用差分法确定短路抑制位置;再将短路抑制特性与差分特点相结合,确定短路抑制的起点和终点位置,对抑制段信号进行线性修复。然后,采用中值滤波、均值滤波以及平滑滤波等对电流信号滤波。最后,通过滤波后信号与基于实际熔池的理论模型电流信号分析对比及预设固定偏差的试验,证明组合滤波的有效性。Aiming at the rotating arc signal with short circuit suppressing, in order to improve the current signal-to-noise ratio, a combined filtering method was proposed. Firstly, the short-circuit suppression position in the current signal was determined by the difference method. The short-circuit suppression characteristic was analyzed combined with the differential characteristic to determine the starting point and the end position of the short-circuit suppression, and the suppression segment signal was linearly repaired. Then, the current signal was filtered by median filtering, mean filtering, and smoothing filtering.Finally, the effectiveness of the combined filtering was proved by comparing the filtered signal with the theoretical model current signal based on the actual molten pool and the preset fixed deviation test.

关 键 词：理论模型 短路抑制 旋转电弧 组合滤波 

分 类 号：TG409[金属学及工艺—焊接]