کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
727635 892771 2011 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Graphic supervisory control of an automatic optical inspection for LED properties
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Graphic supervisory control of an automatic optical inspection for LED properties
چکیده انگلیسی

This paper focuses on the development and manufacture of an automated optical inspection (AOI) system for light emitting diode (LED) properties, which include the luminance and forward voltage. We use the concept of graphic supervisory control to combine LabVIEW software and programmable logic controller (PLC) for the motion control. By connecting the analog input block, PLC would read the forward voltage to judge whether this value is too large or not. In LED optical inspection, LabVIEW software is employed to coordinate charge coupled device (CCD) camera interface in acquiring data and processing image analysis. The LED luminance is inspected according to whether or not it achieves the desired standard pixels of binary morphologic area. In the inspection process, LEDs quickly advance on rail, and a pneumatic cylinder will sort them into different storages by PLC. The system characteristics mainly include automated platform control and imaging inspection. From experiments, the LED inspection speed could achieve 40–45 pieces per minute. For luminance inspection, the rate of accuracy approaches 100% when the inspection in a dark room or the brightness of exterior environments is fixed.


► We use the concept of graphic supervisory control to combine LabVIEW software and PLC for the motion control.
► The system characteristics mainly include automated platform control and imaging inspection.
► The user can use measurement data to set up a range of standard values, and immediately calculate the rate and amounts of qualified LEDs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 44, Issue 8, October 2011, Pages 1349–1360
نویسندگان
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