基于变面积式双涡流传感器的焊缝跟踪系统
A seam-tracking system based on variable-area-typed dual eddy current sensor
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摘要: 针对薄板对接接头错边问题以及搭接接头难以实现焊缝跟踪问题，提出了一种基于变面积式双涡流传感器的焊缝跟踪方法.将两变面积式涡流传感器置于焊缝的一侧，通过双传感器分别检测高低和左右的位置信息，相互补偿得到独立的偏差信号以实现焊缝跟踪.分析了变面积式涡流传感器的原理，利用响应面法拟合响应曲面，进行变量分离，得到了输出电压信号与面积的关系式.最后，搭建简易平台进行了薄板对接及搭接的焊缝跟踪试验.结果表明，双涡流传感器焊缝跟踪方法具有可行性与正确性，为自动焊缝跟踪技术研究提供了新的研究方向.Abstract: Considering the misalignment in sheet butt joint and the difficulty in tracking lap joint, a weld seam tracking method was proposed based on variable-area-typed dual eddy current sensor. The weld seam tracking was realized with mutually compensated independent deviation signal, by detecting level and horizontal location information, respectively, with two variable-area-typed eddy current sensors put on one side of the weld seam. The principle of variable-area-typed eddy current sensor was analyzed. The response surface was fitted by using responsesurface method, and the variables were separated to obtain the relation between the area and the output voltage signal. Finally, a simple platform was established to conduct seam tracking experiments during thin plate butt and lap welding. The results verify the feasibility and accuracy of the weld seam tracking method with variable-area-typed dual eddy current sensors, providing a new research field for automatic weld seam tracking technology.
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