Development and evaluation of a workpiece temperature analyzer for industrial furnaces. Phase 1-A

Technical Report · Fri Nov 01 00:00:00 EST 1991

DOI:https://doi.org/10.2172/10107168· OSTI ID:10107168

The Workpiece Temperature Analyzer (WPTA) is a unique approach for measuring bulk temperature for metallic materials. It applies polarizing interferometer technique with an impulse laser to measure time-of-flight (TOF) for ultrasonic waves and converts these measurements to bulk temperatures. It has potential applications for controlling or monitoring several metallurgical heat treatment processes. During Phase 1A of the development program a bench scale unit was built and operated. The TOF for a variety of materials such as carbon steel, stainless steel, brass and aluminum were measured at room temperature as well as elevated temperatures up to 1875{degrees}F in some areas. The measurements were made for various thicknesses ranging from {1/4} inches to 3 inches. The instrument was modified to improve signal to noise ratio, and to accommodate speckle phenomenon associated with diffusive surfaces. Normal equipment vibrations in the industrial environment did not adversely affect the measurements. On the contrary, they were beneficial and allowed to eliminate one of the two photomultipliers. The testing has demonstrated technical feasibility of the concept. Further development work is planned to investigate reproducibility and accuracy of measurements.

• Research Organization: Surface Combustion, Inc., Maumee, OH (United States); Textron, Inc., Everett, MA (United States). Textron Defense Systems
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FC07-89ID12830
• OSTI ID: 10107168
• Report Number(s): DOE/ID/12830-2; ON: DE92005060
• Resource Relation: Other Information: PBD: Nov 1991
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
42 ENGINEERING
FURNACES
CARBON STEELS
TEMPERATURE MEASUREMENT
STAINLESS STEELS
BRASS
ALUMINIUM
INDUSTRY
ENERGY CONSERVATION
SIGNAL-TO-NOISE RATIO
FEASIBILITY STUDIES
ULTRASONIC TESTING
INTERFEROMETRY
440500
320303
360104
421000
THERMAL INSTRUMENTATION
EQUIPMENT AND PROCESSES
PHYSICAL PROPERTIES
COMBUSTION SYSTEMS