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Srinivasagan, M.
- Vision Inspection System for MIG Welding Joints Using Different Feature Extraction Methods
Authors
1 Dept. of Mech., Velammal College of Engg & Tech., Madurai, Tamil Nadu, IN
2 Dept. of Mech., A. C College of Engg & Tech., Karaikudi, Tamil Nadu, IN
Source
Automation and Autonomous Systems, Vol 4, No 3 (2012), Pagination: 99-109Abstract
In this paper, an efficient technique has been described for inspection of Metal Inert Gas welding (MIG). A machine vision system has been developed for identifying and classifying the surfaces of butt joint as per standard EN25817 in MIG welding.Images of welded surfaces are captured through CCD camera. Then regions of interest are segmented and the average gray levels of the characteristic features of these images are calculated using 2D feature vector and Gaussian distribution based features. Finally, welded joints can be classified into one of the four pre-defined images based on the back propagation neural network. In this work, 80 real samples of images are tested and performance of the vision system is compared with twodifferent feature extractions. vision inspection system using Gaussian based feature extraction method produced 93.75% than 2D feature extraction method which is produced 92.5%.
Keywords
Machine Vision, Weld Classification, Industrial Inspection, Back Propagation Neural Network (BPN).
- Impact Behavior of Automotive Bumper Beam under Crashes
Authors
1 Department of Mechanical Engineering, SRM University, Chennai - 603203,Tamil Nadu, IN
2 Department of Mechatronics Engineering, SRM University, Chennai - 603203, Tamil Nadu, IN
3 Department of Automobile Engineering, SRM University, Chennai - 603203,Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 44 (2016), Pagination:Abstract
Objectives: This work is an attempt to present commercially used designs and analyze it to compare the impact behavior of each design of bumper beams during head-on collisions Methods/Statistical Analysis: In order to avoid series of destructive test for a new vehicle to be performed the necessity of economical design using finite element is performed in this study. Parameters like materials, shape and thickness are considered for carrying out analysis with the help of Hypermesh 9.0 and LS-DYNA software Findings: The main criterion to be discussed is energy absorbing Behavior of bumper beams during headon collisions. Analysis is carried out upto 20 millisecond. Results for different Designs and for varying thickness are obtained and compared to study the impact Behavior of beams under study. Impact behavior of Bumper beam is analyzed based on energy absorption of the beam and the displacement condition. Maximum nodal displacement is obtained for different thickness and materials and plotted over the period of time Application/Improvements: Experimental setup has to be developed for the testing of the model under crashes and to be analysed at operating condition.Keywords
Impact, Collisions, FEA, Bumper Beam, Energy AbsorptionFull Text
