Abstract
A new inspection system is supposed to be introduced in nuclear power plants in Japan. In the corrective action program (CAP) based on quality management system, sharing of nonconformity information, management of corrective and preventative action are required. For management of the corrective action, relevant data have to be correctly and efficiently recorded and managed. In order to address the new system, we developed a maintenance support tool using augmented reality (AR) technology. This tool helps users identify apparatus or parts to be inspected correctly with selflocalization and 3D object recognition technology, and assists users’ recognition and judgment of the object conditions. AR is the technology to merge a live view of the real world with computer-generated images. AR makes it possible to display information required for inspection on the screen of a smart phone or a tablet PC. To identify apparatus or parts for inspection, the recognition technology by the photograph marker and AR marker were adopted. A photograph marker is a technique using a photograph of the subject obtained beforehand, and AR marker is a technique using a 2- dimensional bar code attached on the object part. The recognition technology using a photograph marker registers the photograph of the apparatus of interest beforehand. Furthermore, the self-localization technology using Visual Simultaneous Localization and Mapping (Jorge F., et al., 2012) technology is adopted for navigation or identification for check. This technology extracts the details of the surrounding object using the camera and an infrared depth sensor of a smart phone. Three-dimensional position and a posture of the smart phone can be computed by tracking objective details in real time. In order to develop the maintenance support tool using these technologies, the following work items were selected from maintenance tasks, system tests and pressure proof tests.
