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pcb solder joint
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  相似匹配句对
     Function of Solder Mask in PCB
     PCB阻焊膜的功能
短句来源
     Thickness Uniformity of Solder Resist for PCB
     改善PCB阻焊膜厚度均匀性
短句来源
     Laser holographic inspection of solder joints of PCB
     印刷电路板焊点缺陷的激光全息检测
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     On Testing of PCB
     PCB测试方法综述
短句来源
     The Theory and Experiment Researches about The Solder Joint Reliability on PCB
     PCB焊点可靠性问题的理论和实验研究进展
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This paper first reviews the recent development of Several inspection methods and mainly introduces the Holographic inspection system of PCB Solder joint defects, which is tried and implemented by the authors and their coleagues. Holographic inspection method is a newer one of PCB solder joint inspection. The principle of holographic inspection and the composition of the inspection system are described in detail in this paper, and the experimental result is given.

本文首先从国内外的发展现状,概述了印刷电路板缺陷焊点的几种检测手段。并着重介绍了作者与其同事们正在研制的激光全息印刷电路板焊点缺陷自动检测系统。

In surface mounting technology(SMT),soldered joint data information is the basis of process automation in partial reflow soldering .The methods of surface mounting technology printed circuit board (SMT_PCB) image processing ,SMT_PCB soldered joint type and location information automatic gaining were introduced in this paper.The SMT_PCB image processing technology in the paper includes noise eliminate,image black white and object repair.After SMT_PCB image had been analyzed,template...

In surface mounting technology(SMT),soldered joint data information is the basis of process automation in partial reflow soldering .The methods of surface mounting technology printed circuit board (SMT_PCB) image processing ,SMT_PCB soldered joint type and location information automatic gaining were introduced in this paper.The SMT_PCB image processing technology in the paper includes noise eliminate,image black white and object repair.After SMT_PCB image had been analyzed,template and arithmetic operator were put forward to judge the high frequency noise in image.With the method of using noise judged template and operator to judge high frequency noise first and then filtrate it,the high frequency noise was successfully eliminated.An improving noise eliminated difference template based on the analysis of object and background gray value also has been developed to eliminate the low frequency noise in image.After noise in image has been filtrated,the maximum variance method was used to finish image binaries.For the binary image,an object repaired operator has been put forward to repair the object.Considering character of the soldered joint,pattern matching method has been proposed,and the soldered joint location information data has been automatically gained by using different types soldering joints as pattern.It was proved that the technology put forward in this paper is effective.

在表面组装技术 (SMT)中 ,焊点信息数据是实现部分再流焊过程自动化的基础。本文介绍了表面组装印刷电路板 (SMT_PCB)图像的处理方法和SMT_PCB上焊点类型、位置信息数据的自动获取技术。本文中 ,SMT_PCB图像的处理包括去噪声处理、二值化和目标修饰处理。根据对SMT_PCB图像的分析 ,提出了SMT_PCB图像高频噪声判断模板和算子 ,通过采用噪声判断模板和算子先判断高频噪声再用均值滤波的方法成功地去除了高频噪声。对图像中的低频噪声 ,基于对图像中目标与背景灰度值特点的分析 ,提出了改进的差分去噪声模板。采用最大方差阈值方法得到合适的阈值对图像实现了分割。对已分割得到的二值化图像 ,提出了目标图像修饰算子 ,并对图像中的焊点图像进行了修饰。根据对处理后焊点图像特点的分析 ,提出以不同类型焊点为模板 ,通过模板匹配方法实现焊点位置数据的自动获取

 
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