A method for supporting hammering test by visualization of defect diagnosis on the concrete surfaces

Hammering test is widely used as a non-destructive testing method for concrete structures. In hammering test, it is important for reducing human's burden and time-consumption because there are large and a lot of concrete surfaces which should be inspected. This paper introduces a novel approach to support hammering test effectively b y displaying the diagnostic results immediately on the concrete surface. The proposed method detects the hitting positions of hammer, analyzes the acoustic data of the hitting sounds, and shows both results on the concrete surface by projection mapping in real time. In order to confirm the effectiveness of the proposed method, we performed the experiments by measured the accuracy of hitting positions and those defect on test concrete block which includes peelings as the defect. Moreover, we evaluated the proposed displaying method compared with non-support approaches. Through the experiments, we confirmed the effectiveness of the proposed approach.