Active infrared nondestructive testing system

Based on laser scanning technique, infrared method and electronic technology, studied and designed a set of infrared ND T system with laser scanning automatic heat exciting method in this paper. To make use of this device, it may detect internal defects of metal material parts, such as micro-craze, rarefaction, blowholes, etc. This paper also introduced the work principle of testing system. It heat automatically pretreatment to workpiece with CO, laser scanning and through infrared technique received temperature field from workpiece heat conduction. After the filter and the AID converter system, the changed signal is taken into a single chip computer and the computer make it complete data analysis, data processing, save and display. Therefore, it can achieve detecting characteristic and property of internal defects of parts.