Nondestructive Testing System with Heat Transfer Characteristics in Composite Materials

In industrial manufacturing processes, swift and accurate flaw detection is very important. In particular, considerable research is being conducted into flaw detection utilizing non-destructive testing. However, the testing of shoes currently depends on sampling or visual inspection based total inspection. Visual total inspections are not regarded as being optimal due to problems such as fatigue on the part of the inspector, inspection inconsistencies, and cost. In this study, the infrared thermography technique and air-coupled ultrasonic technique were employed to conduct a nondestructive inspection of the bonded parts of shoes made from ethylene vinyl acetate, the most commonly used material in shoe manufacture. The feasibility of employing a total and nondestructive inspection technique for shoe inspection using a halogen lamp, ultrasonic excitation, and a heating box made using heat coils as the artificial heat source was confirmed.