Industrial & Manufacturing
MACHINE VISION
Research in the area of machine vision includes the application of machine vision in tool wear studies, in-cycle assessment of tool wear and surface roughness, non-contact measurement of surface roughness, non-destructive testing (weld radiography), dimensional measurement, inspection and measurement using the flatbed scanner as well as image processing. Some of the recent publications in this field are:
H.H. Shahabi, M.M. Ratnam, Non-contact roughness measurement of turned parts using machine vision, International Journal of Advanced Manufacturing Technology 46: 275-284(2010).
H.H. Shahabi, M.M. Ratnam, In-cycle detection of built-up edge (BUE) from 2-D images of cutting tools using machine vision, International Journal of Advanced Manufacturing Technology 46: 1178-1189 (2010).
H.H. Shahabi, M.M. Ratnam, Prediction of surface roughness and dimensional deviation of workpiece in turning: A machine vision approach, International Journal of Advanced Manufacturing Technology 48: 213-226 (2010).
G.J. Chian, M.M. Ratnam, Determination of tool nose radii of cutting inserts using machine vision, Sensor Review 31(2) (2010-accepted).
S. J. Abdullah, M. M. Ratnam, Z. Samad, Error-based autofocus system using image feedback in liquid-filled diaphragm lens, Optical Engineering 48(12) (2009).
H.H. Shahabi, M.M Ratnam, Study on the effect of nose wear and groove wear on surface roughness of turned parts using machine vision, World Applied Sciences Journal 7(3): 343-349 (2009)
C.W. Kee, M.M. Ratnam, A simple approach to fine wire diameter measurement using high-resolution flatbed scanner, International Journal of Advanced Manufacturing Technology 40: 940-947 (2009).
H.H. Shahabi, M. M. Ratnam, In-cycle monitoring of tool nose wear and surface roughness of turned parts using machine vision, International Journal of Advanced Manufacturing Technology 40: 1148-1157 (2009).
H.H. Shahabi, M. M. Ratnam, Assessment of flank wear and nose radius wear from workpiece roughness profile in turning operation using machine vision, International Journal of Advanced Manufacturing Technology 43(1-2): 11-21 (2009).
T.Y.Lim, M.M.Ratnam, M.A.Khalid, Automatic weld bead extraction from digitised radiographs using grey level intensity profiles and least-squares fitting, Insight - Non-Destructive Testing & Condition Monitoring (the Journal of British Institute of Non-Destructive Testing), 50(1):1-6 (2008).
S.L Soo, Ratnam M.M., Samad Z., M. A. Khalid, Segmentation of weld defects in radiographs using rank-leveling and background subtraction, Insight - Non-Destructive Testing & Condition Monitoring (the Journal of British Institute of Non-Destructive Testing) 50(4): 188-194 (2008).
H.H.Shahabi, M.M.Ratnam, On-line monitoring of tool wear in turning operation in the presence of tool misalignment, International Journal of Advanced Manufacturing Technology, 38(7-8): 718-727 (2008).
For more information please contact: Professor Mani Maran Ratnam (
OPTICAL METROLOGY
Research in the field of optical metrology is focused on the application of phase-shift fringe projection and moiré method for the measurement of shape, displacement and characterization of the behavior of composite materials and products. Some of the past research includes the measurement of flexural modulus of polymeric foam using moiré method, in-plane displacement sensing using circular grating moiré, crack growth measurement using moiré, characterization of micro-cantilever using phase-shift shadow moiré, measurement of PCI connector tilt using phase-shift fringe projection, study of static deformation of composite pallet using shadow moiré etc. Some of the recent publications in this field are:
K.S. Yen, M.M. Ratnam, H.M. Akil, Measurement of flexural modulus of polymeric foam with improved accuracy using moire method, Polymer Testing 29: 358-368 (2010).
J.H.Lim, M.M. Ratnam, I.A. Azid, D. Mutharasu, Deflection measurement and determination of Youngs modulus of micro-cantilever using phase-shift shadow moire method, Experimental Mechanics 50(7): 1051-1060 (2010).
V. Retnasamy, M.M. Ratnam, Measurement of PCI connector tilts using phase-shift fringe projection, International Journal of Advanced Manufacturing Technology 38: 1172-1180 (2008).
T.S. Khoo, M.M. Ratnam, H.P.S. Abdul Khalil, Wood filler(WF)-recycled polypropylene(RPP) composite pallet: Study of static deformation using FEA and shadow moire, Journal of Reinforced Plastics and Composites, 27(16-17): 1733-1744 (2008).
I.A.Azid, C.P. Tan, B.L.Lee, K.N.Seetharamu, M.M.Ratnam, M.V.V.Murthy, Fracture mechanic analysis of package delamination, Key Engineering Materials 297-300: 844-850 (2005).
For more information please contact: Professor Mani Maran Ratnam (