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    • 42. 发明授权
    • Method and system for inspecting electronic components mounted on printed circuit boards
    • 检查安装在印刷电路板上的电子部件的方法和系统
    • US07181058B2
    • 2007-02-20
    • US09735097
    • 2000-12-11
    • John J. WeisgerberDonald J. SvetkoffDonald K. Rohrer
    • John J. WeisgerberDonald J. SvetkoffDonald K. Rohrer
    • G06K9/00
    • H05K13/08
    • A method and system are provided for inspecting electronic components mounted on printed circuit boards utilizing both 3-D and 2-D data associated with the components and the background on which they are mounted on the printed circuit board. Preferably, a 3-D scanner in the form of a solid state dual detector laser images the components and solder paste on the printed circuit board to obtain the 3-D and 2-D data. Then, a high speed image processor processes the 3-D data to find the locations of the leads and the solder paste. Then, the high speed image processor processes the 2-D data together with the locations of the leads and the solder paste to distinguish the leads from the solder paste. The high speed image processor may calculate centroids of feet of the leads, average height of the feet and border violation percentage of the solder paste.
    • 提供了一种方法和系统,用于利用与组件相关联的3-D和2-D数据以及它们安装在印刷电路板上的背景来检查安装在印刷电路板上的电子部件。 优选地,以固态双检测器形式的3-D扫描仪将印刷电路板上的部件和焊膏成像,以获得3-D和2-D数据。 然后,高速图像处理器处理3-D数据以找到引线和焊膏的位置。 然后,高速图像处理器将二维数据与引线和焊膏的位置一起处理以区分引线与焊膏。 高速图像处理器可以计算引线的脚的重心,脚的平均高度和焊膏的边界违例百分比。
    • 46. 发明授权
    • Triangulation-based 3-D imaging and processing method and system
    • 基于三角测量的三维成像和处理方法及系统
    • US5812269A
    • 1998-09-22
    • US853305
    • 1997-05-09
    • Donald J. SvetkoffDonald K. RohrerRobert W. Kelley
    • Donald J. SvetkoffDonald K. RohrerRobert W. Kelley
    • G01B11/24
    • G01B11/24
    • A triangulation-based method and system for high speed 3D and gray scale imaging and associated pre-processing of digitized information allows for estimation or filtering of height and gray scale values based upon the confidence level of the information obtained from a pair of sensors and also based upon knowledge of the object structure and its reflectance characteristics. A modulated laser beam is scanned across the object to create a plurality of spots which are viewed by a pair of well-matched receivers. Each receiver includes a light collection and delivery system, a position sensitive detector, and an associated ratiometric signal processor, or similar means for extraction of height and intensity information or data by triangulation. An optional automatic light control sub-system provides greatly extended dynamic range with control inputs derived from an amplifying detector included in each receiver to maximize occurrences of valid data points. Prior to image processing, each point in the digitized 3D and gray scale data is transformed based upon the digital values of the gray scale and height values. The multi-channel pointwise transformation produces an improved estimate of intensity and height at a point of interest, or is used to filter the data for improvements in the 3D and gray scale contrast prior to image processing and measurement analysis. Either linear or non-linear transformations are utilized, based on the match between 3D and gray values, and other conditions which determine the confidence level of the information.
    • 用于高速3D和灰度成像以及相关的数字化信息预处理的基于三角测量的方法和系统允许基于从一对传感器获得的信息的置信水平来估计或过滤高度和灰度值,并且还 基于对象结构及其反射特性的知识。 经过对象扫描调制的激光束以产生由一对良好匹配的接收机观看的多个点。 每个接收器包括光收集和传送系统,位置敏感检测器和相关联的比率信号处理器,或用于通过三角测量提取高度和强度信息或数据的类似装置。 可选的自动光控子系统通过从每个接收器中包括的放大检测器得到的控制输入提供极大的扩展动态范围,以最大化有效数据点的出现。 在图像处理之前,数字化3D和灰度数据中的每个点都基于灰度和高度值的数字值进行变换。 多通道点转换产生了对感兴趣点的强度和高度的改进估计,或者用于过滤数据,以在图像处理和测量分析之前对3D和灰度级对比度进行改进。 基于3D和灰度值之间的匹配以及确定信息的置信水平的其他条件,使用线性或非线性变换。