建立基于弧光传感的试验系统 ,在定点电弧和连续行走电弧下 ,利用频率线性变化的变动焊接电流对薄钢板TIG焊熔池进行激振 ,当熔池固有振荡频率同激振电流频率一致时 ,熔池发生谐振。通过对电弧弧光采样数据幅值提取 ,检测出熔池振荡特征信号并可证明为熔池谐振信号 ,可用于实时判断焊接熔池尺寸信息 ,为解决连续行走TIG焊熔透控制开辟了一条新途径。 A test system based on arc sensor was established. Under the arc of fixed point and continuous walking arc, the weld pool of TIG welding of thin steel plate was excited by the variable welding current of linear frequency. When the natural frequency of molten pool coincided with the exciting current , Molten pool resonance. By extracting the amplitude of arc arc sampling data and detecting the characteristics of weld pool oscillation, it can be proved to be the weld pool resonance signal, which can be used to judge the weld pool size information in real time, which opens up a new way to solve the penetration control of continuous walking TIG welding .