Machine vision system for the industrial quality control of printed circuit boards

2005 ◽  
Author(s):  
José J. Esteve-Taboada ◽  
Begoña Pastor ◽  
Ignacio Goñi ◽  
Ramón García ◽  
Juan Hervas ◽  
...  
Keyword(s):  
Quality Control ◽  
Machine Vision ◽  
Printed Circuit Boards ◽  
Vision System ◽  
Machine Vision System ◽  
Circuit Boards ◽  
Printed Circuit

scholarly journals Machine vision for automatic inspection of pin through hole components assembled on a PCB

2021 ◽  
Vol 6 (1) ◽  
pp. 091-098
Author(s):  
S Celaschi ◽  
MS de Castro ◽  
Alecio Fernandes ◽  
A.L. Xavier
Keyword(s):  
Machine Vision ◽  
Printed Circuit Boards ◽  
Assembly Line ◽  
Automatic Inspection ◽  
Circuit Boards ◽  
Classification Analysis ◽  
Printed Circuit ◽  
Desktop Computers ◽  
Industrial Assembly ◽  
Through Hole

Automatic and innovative equipment was developed to inspect the assembly of pin-through-hole components on printed circuit boards. Its performance was tested on an industrial assembly line of motherboards for desktop computers. The test was conducted to inspect, under the binomial criterion Pass/Fail, the process of inserting PTH-DIMM components on semi-finished PCBs. Using the concept of Inspection Accuracy in binomial classification analysis it was estimated that the accuracy of this inspection is greater than 98%.

A Machine Vision System for Inspecting Hydraulic Hose Assemblies

1994 ◽  
Author(s):  
Sudhir I. Mehta ◽  
Bruce B. Chenoweth
Keyword(s):  
Quality Control ◽  
Machine Vision ◽  
Human Error ◽  
Vision System ◽  
Control Process ◽  
Shop Floor ◽  
Machine Vision System ◽  
Quality Control Process

Abstract This paper describes a machine vision system for inspecting hydraulic hose assemblies. At present the inspection in this industry is done manually and is prone to human error. A specially designed hose gripping mechanism, a mandrel system, and a camera and lighting fixture allows the system to be integrated on a shop floor and is able to inspect various parameters of a fitting. The system allows the inspection to be done more accurately and improves the quality control process.

scholarly journals THE QUALITY CONTROL OF PLATED-THROUGH HOLES OF PRINTED CIRCUIT BOARDS BY PULSED LASER HEATING

2021 ◽  
Vol 3 (65) ◽  
pp. 96-102
Author(s):  
Vyacheslav A. Sergeev ◽  
◽  
Maksim Y. Salnikov ◽  
Azat M. Nizametdinov ◽  
◽  
...  
Keyword(s):  
Quality Control ◽  
Temperature Measurement ◽  
Printed Circuit Boards ◽  
Heat Removal ◽  
Thermal Control ◽  
Contact Method ◽  
Circuit Boards ◽  
Ir Camera ◽  
Printed Circuit

The article gives a brief overview of standard methods of quality control and defect diagnostics of plated-through holes (PTH) of printed circuit boards (PCB) and considers their main disadvantages. It scrutinizes the methods of thermal control, which are reduced to PTH heating and monitoring the temperature. The main disadvantage of common methods is that they require a contact during heating the PTH and temperature measurement, which leads to significant errors and low reliability of control. The article describes a non-contact method involving heating only one side of the PTH by a laser beam and non-contact temperature measurement of the PTH ends by an IR camera. The authors propose a thermal equivalent scheme of PTH to analyze the transient thermal processes in PTH, which takes into account the heat removal from the plating of PTH into the PCB material. It is shown that the quality of plating can be estimated by the temperature difference between the upper (heated) and lower ends of the PTH, and the quality of adhesion between PTH plating and the PCB material can be estimated by the ratio of temperature increments. The article describes peculiarities of this method and gives the results of its testing on a real sample.

Automated inspection of printed circuit boards through machine vision

1996 ◽  
Vol 28 (2) ◽  
pp. 103-111 ◽  
Author(s):  
Wen-Yen Wu ◽  
Mao-Jiun J. Wang ◽  
Chih-Ming Liu
Keyword(s):  
Machine Vision ◽  
Printed Circuit Boards ◽  
Automated Inspection ◽  
Circuit Boards ◽  
Printed Circuit
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