Visualisation of Ultrasonic Testing Data Using Augmented Reality

Ultrasonic testing data is usually visualised in form of Cand D-images. For simple inspection tasks of flat samples, these representation methods are an effective means for identifying and evaluating defects. However, for complex inspection tasks, e.g. testing of large curved composite structures, it is often difficult to relate the findings to the tested structure. Therefore it is important to illustrate the data in a more intuitional way. One approach to master these challenges is to display the ultrasonic data in an ‘augmented reality’ (AR) environment. AR is a computer-based technique supporting the human perception by merging visual images with artificial, computer-generated data. With regard to ultrasonic testing, the AR technology can be used to merge the ultrasonic testing data (e.g. a Cor D-image) with the visual image of the structure. In this way, the ultrasonic image gets visually linked to the tested component and appears less abstract and more tangible than the bare Cor D-image. Furthermore, the blended image facilitates the evaluation of the data and the distinction between actual defects and structure related anomalies. The scope of application of the AR technology is not only limited to ultrasonic testing, but provides also benefits for other NDT methods, e.g. eddy current testing. The present work gives a first impression of the potential of the AR technology for ultrasonic testing on the basis of defective CFRP structures.