Technical Library | 2024-04-29 21:39:52.0
In this paper, we develop and put into practice an Automatic Optical Inspection (AOI) system based on machine vision to check the holes on a printed circuit board (PCB). We incorporate the hardware and software. For the hardware part, we combine a PC, the three-axis positioning system, a lighting device and CCD cameras. For the software part, we utilize image registration, image segmentation, drill numbering, drill contrast, and defect displays to achieve this system. Results indicated that an accuracy of 5µm could be achieved in errors of the PCB holes allowing comparisons to be made. This is significant in inspecting the missing, the multi-hole and the incorrect location of the holes. However, previous work only focusses on one or other feature of the holes. Our research is able to assess multiple features: missing holes, incorrectly located holes and excessive holes. Equally, our results could be displayed as a bar chart and target plot. This has not been achieved before. These displays help users analyze the causes of errors and immediately correct the problems. Additionally, this AOI system is valuable for checking a large number of holes and finding out the defective ones on a PCB. Meanwhile, we apply a 0.1mm image resolution which is better than others used in industry. We set a detecting standard based on 2mm diameter of circles to diagnose the quality of the holes within 10 seconds.
Customized Sand Casting Fitness Equipment Flywheel with Machining A. Sodium silicate sand casting. B. Cast Iron. C. Weight: Upto 7000KG. D. Pump body, impeller, etc. E. Hydraulic test, and other necessary inspections available. 1) molding process:
Customized Sand Casting Fitness Equipment Flywheel with Machining A. Sodium silicate sand casting. B. Cast Iron. C. Weight: Upto 7000KG. D. Pump body, impeller, etc. E. Hydraulic test, and other necessary inspections available. 1) molding process:
CNC milling machining precision parts Cnc milling parts normally contains aluminum machining parts, stainless steel parts, brass machining parts, CNC machining precision parts and so on. Best Machined specializes in manufacturing CNC turning parts
Design For Manufacturability And Yield Enhancement. The Design for Manufacturability (DFM) engine searches for fabrication issues and discovers areas where yields may be increased. GraphiCode's Contour Technology produces fast and accurate results f
Industry Directory | Manufacturer
With its broad product range LPKF is one of the world market leaders in the "in-house rapid PCB prototyping" and "StencilLaser" services
Shanghai Well-Sun Precision Tool Co., Ltd Choose the super-fine grain solid carbides from the famous corporation of the world as our main raw materials.The products are adopted the computer-aided design(CAD & CAM),processed by high precision CNC mach
OEM Milling CNC Sensor Machining Parts with Stainless Steel CNC machining parts, metal machining parts, precision machining parts, Machined parts, Machinery parts,Machine Parts,machining parts machining,Cnc machining parts machinery parts,machined
Cast Iron Sand Casting Energy Storage Flywheel with Customized Service 1. ISO9001-2008. 2. Has advanced euipment and over 15 years experience. 3. Price: Competetive price, Precision made. Experience & Reasonable QC that you can reply on. 4. Process:
Cast Iron Sand Casting Energy Storage Flywheel with Customized Service 1. ISO9001-2008. 2. Has advanced euipment and over 15 years experience. 3. Price: Competetive price, Precision made. Experience & Reasonable QC that you can reply on. 4. Process: