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Thermal Microwave Radiation for Subsurface Absolute Temperature Measurement

100%

Susek W.

issue 6

1246-1249

Problems related to thermal radiation of human bodies in the microwave range are presented in the paper from medical diagnosis point of view. The paper reviews physical principles of thermal radiation measurement at microwave frequencies. A design of a modulation type radiometer with both zero reading and compensation of influence of the reflectivity is presented in the paper. On the base of this design, requirements for absolute temperature measurement conditions in the lossy and homogeneous medium were found. It is worth noting that these demands do not need any limitations for environmental parameters, especially for their stability during measurement (ambient temperature stability). At the end, experimental results of the measurements carried out with the use of the microwave radiometer operating in the 1.5 GHz band are shown.

Nondestructive Evaluation of Shoes Bonded Area Defect Composed of EVA Materials

100%

Choi S., Kim J.

Acta Physica Polonica A

2013

vol. 123

issue 2

333-336

The accurate detection of product defects in the assembly line is crucial to any industry. To achieve accurate detection, extensive studies have been conducted, in particular, on the nondestructive inspection technique. Shoe manufacturers, however, have yet to adopt a reliable defect-detection technique for their total inspection system. The deterioration of strength, one of the most common defects found in the shoe manufacturing process, is caused by the delamination in the bonding stage. Inadequate bonding between midsole and insole, the most serious of identified defects, has so far been detected only by cutting a sample shoe and examining it for its strength. For this study, the researcher tested the validity of some nondestructive techniques employed in inspecting shoes, particularly the infrared thermography technique and non contact air coupled ultrasonic testing, which are used to examine the bonded part of shoes made from ethylene vinyl acetate (EVA), the most common material used in manufacturing shoes. The study has thus confirmed the feasibility of applying a total inspection and nondestructive inspection technique to shoe inspection.

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2 Acta Physica Polonica A

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1 Choi S.

1 Kim J.

1 Susek W.

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Thermal Microwave Radiation for Subsurface Absolute Temperature Measurement

Nondestructive Evaluation of Shoes Bonded Area Defect Composed of EVA Materials