公开(公告)号：US06538750B1

公开(公告)日：2003-03-25

申请号：US09314169

申请日：1999-05-19

申请人： David Fishbaine ,  Steven K. Case ,  John P. Konicek ,  Thomas L. Volkman ,  Brian D. Cohn ,  Jeffrey A. Jalkio

发明人： David Fishbaine ,  Steven K. Case ,  John P. Konicek ,  Thomas L. Volkman ,  Brian D. Cohn ,  Jeffrey A. Jalkio

IPC分类号： G01B114

CPC分类号： H05K13/0812

摘要： The system of the present invention reports a signal related to a physical condition of an object, such as an electronic component, with the most basic realization of the system including a vacuum quill for releasably holding the object and a motion control system for rotating the quill. The invention includes control electronics coupled to the detector for providing a trigger signal where the detector is oriented to view a stripe in a viewing plane perpendicular to the central axis of the quill, and to provide an image of the stripe. The control electronics sends a plurality of trigger signals to the detector while the motion control system rotates the quill, with each trigger signal triggering the acquisition of another image of a stripe. A processing circuit processes the plurality of images of the stripes to provide the signal related to the physical condition of the object, which can include the orientation or location of the component, the presence or absence of balls on a ball grid array, the height of a specific lead on a leaded component, the distance between the leads on a leaded component or the coplanarity of features on the component. A method for picking and placing components is also disclosed for use with the apparatus of the present invention.

摘要翻译： 本发明的系统报告与诸如电子部件的物体的物理状况相关的信号，其中包括用于可释放地保持物体的真空套筒的系统的最基本的实现以及用于旋转套筒的运动控制系统 。 本发明包括耦合到检测器的控制电子装置，用于提供触发信号，其中检测器被定向成在垂直于套筒的中心轴线的观察平面中观察条纹，并提供条纹图像。 当运动控制系统旋转套筒时，控制电子装置将多个触发信号发送到检测器，每个触发信号触发获取条带的另一个图像。 处理电路处理条纹的多个图像以提供与物体的物理状态相关的信号，其可以包括部件的取向或位置，球栅阵列上的球的存在或不存在， 引导元件上的特定引线，引导元件上的引线之间的距离或元件上特征的共面性。 还公开了用于拾取和放置部件的方法，用于与本发明的装置一起使用。