Role of comparative and qualitative thermography in predictive maintenance

Richard Norman Wurzbach; Robert G. Hammaker

doi:10.1117/12.58518

1 April 1992 Role of comparative and qualitative thermography in predictive maintenance

Richard Norman Wurzbach, Robert G. Hammaker

Proceedings Volume 1682, Thermosense XIV: An Intl Conf on Thermal Sensing and Imaging Diagnostic Applications; (1992) https://doi.org/10.1117/12.58518
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

Performing a complete thermographic survey for a utility, process plant, etc. involves looking at hundreds of components. Generally, they are multiple pieces of identical equipment which operate simultaneously, and the redundancy allows for comparative evaluation between these pieces of equipment. When performing this evaluation with thermography, valuable information can be obtained for a predictive maintenance program. Some applications exist where quantitative data is not required to diagnose and recommend appropriate corrective action. In these cases, qualitative techniques may be adequate in providing the needed information. Most applications, however, require assigning values to observed thermal patterns for the purposes of trending, designating severity levels, and assigning priorities. In these cases, comparative thermography can be used to provide the best available data in lieu of ideal thermal measurement capabilities. Changing load considerations, techniques in performing rough emissivity estimates, and the ability to differentiate emissivity differences on energized or rotating equipment give the predictive maintenance engineer the ability to provide useful information under the less—than—ideal circumstances frequently encountered in the field.

Citation Download Citation

Richard Norman Wurzbach and Robert G. Hammaker "Role of comparative and qualitative thermography in predictive maintenance", Proc. SPIE 1682, Thermosense XIV: An Intl Conf on Thermal Sensing and Imaging Diagnostic Applications, (1 April 1992); https://doi.org/10.1117/12.58518

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