基于红外光电成像的后挡玻璃加热丝检测方法

Detecting method of heating wire for rear glass based on infrared optoelectronic imaging

加热丝一般是通过网印的方式将专用的导电银浆印刷到玻璃的表面,玻璃经钢化后,导电银浆烧结到玻璃表面。但是生产的加热丝很容易出现加热丝断裂和异常高温点等质量问题,传统的后挡玻璃加热丝检测方法多采用接触法初略检测其电阻值,根本无法检测出后挡玻璃是否存在加热丝断裂和异常高温点。针对这一问题,提出了一种基于红外光电成像的汽车后挡玻璃加热丝检测方法,即用红外热像仪获取汽车后挡玻璃加热丝通电加热后的热像图,基于该图进行图像预处理和细化处理,然后对其中的后挡玻璃加热丝的根数进行识别统计。将该方法应用在汽车后挡玻璃生产线上后,可以有效检测出每块后挡玻璃的加热丝是否存在缺陷,提高了玻璃生产线的检测效率。

Heating wire＇s printing is generally through the screen printing method to dedicate conductive silver on the glass surface,after tempering,conductive silver paste sintered to the glass surface. But the production of heating wire is prone to appear fracture and have abnormal high temperature points and other quality problems,and the traditional method of heating wire detection is just to detect its resistance value,simply can not detect the presence of the breakage and high temperature points. Aiming at this problem,this paper presents a detection method of the heating wire of automobile rear glass based on infrared photoelectricity,through obtaining the thermal image of the heating wire of the glass after the heating wire is heated by the infrared thermal imager. After pretreatment and refinement processing,the number of the heating glass in the rear glass is counted and the abnormal high temperature points is labeled. The method can effectively detect whether the heating wire of each rear glass is defective and can improve the detection efficiency.