"The laser aided manufacturing process is a process in which parts are built by adding material into the melt pool created by a laser. This process involves a complex thermal history which is important in determining the quality of the parts built. The objective of this study is to develop a high resolution two color imaging pyrometer which can measure the temperature of an object without the dependence of spectral emissivity of the material at an economical price. An 8.8 MP CMOS sensor is used as an imaging sensor. The visible spectrum of light is used for temperature measurement. The imaging pyrometer is calibrated and compared to a commercially available thermocouple, pyrometer and infrared camera. It is used to measure the temperature during the laser deposition process. The temperatures of the melt pool during laser scan without addition of material for different laser powers are measured. The temperatures during the deposition process while material is being added are also measured. The results obtained shows that the two color imaging pyrometer developed is able to measure the temperatures with better accuracy without known emissivity than long wave infrared cameras which are highly dependent on the emissivity for accurate measurement"--Abstract, page iii.
Liou, Frank W.
Newkirk, Joseph William
Kinzel, Edward C.
Materials Science and Engineering
M.S. in Manufacturing Engineering
Missouri University of Science and Technology
viii, 46 pages
© 2015 Niroop Matta, All rights reserved.
Thesis - Restricted Access
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Link to Catalog RecordElectronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library. http://laurel.lso.missouri.edu/record=b12136222~S5
Matta, Niroop, "Development of two color imaging pyrometer for studying thermal history of laser metal deposition" (2015). Masters Theses. 7707.