铝合金交流钨极氩弧焊熔池图像传感方法

为了采用图像处理与模式识别的方法对铝合金的焊接质量进行知识控制，必须获取铝合金焊接熔池的汪晰图像，然后提取焊接熔池的信息，在对铝合金焊接光变分析的基础上，以焊接电弧光中的连续光谱作为光源，采用宽带滤波方法设计的全新的光学图像传感器，利用普通工业CCD摄像机获得了画面清晰，质量稳定的铝合金焊接熔池区域图像，针对所获得的铝合金焊接熔池图像中干扰分配的不均衡性，采用新型分区滤波图像预处理算法，得到了铝合金焊接熔池的理想特征参数，该算法具有抗干扰强，速度快的特点，对提高铝合金的焊接质量具有重要意义。

Method of Image Conducting in AC Tungsten Inert Gases Welding of Aluminum Alloy

In order to control the quality of welding by image processing and pattern recognition, the clear image of the welding pool of aluminum alloy and the information of the welding pool must be obtained. A completely new optical sensor is designed by the analysis to the light spectrum of welding of aluminum alloy which is on the broad band filtering and the welding arc light is used as resource during the work. It greatly reduces the noise from the discontinuous spectrum in the arc and adapts to the seriously fluctuating welding current during the process and obtains the clear images of the welding pool using common industrial CCD camera. In view of these things that noise distribution is not even in the aluminum alloy's welding pool image, a pretreatment arithmetic named subarea filter is applied in the images proceeding. With the new algorithm, the desirable characteristic parameters of the welding pool of aluminum alloy's AC tungsten inert gases welding are obtained. The arithmetic's anti interference ability is high and operation speed is quick.