Toshiba Corporation is constructing a database system of as-built data of equipments and components in various n uclear plants in order to reduce the amount of redesign works when the plants are modified. We are obtaining the as-built data by using 3D laser scanner, and storing the data as 3DCAD models for ease-of-use. However, it takes long hours to obtain 3DCAD models because the volume of 3D laser scan data is very large and workers manually c onvert those data to 3DCAD models.In this development, we ha...
英字タイトル:
Automated 3D Shape Recognition System using Laser Scan Data

The main roles of in-vessel visual inspection (IVVI) are to detect cracks on the surface of internal structures and measure the length of the cracks. For accurately performing those matters by visual inspection, inspectors sometimes need to obtain three-dimensional (3D) measurements of cracks and 3D shape of the surface. We have been developing a prototype system to obtain 3D measurements. This system is based on stereo vision technique and has on ly one measurement head that has an inner movable camera m...
英字タイトル:
Three-Dimensional Measurement System for In-Vessel Visual Inspection

The main roles of in-vessel visual inspection (IVVI) are to observe internal structures and crack on the structure surface. For accurately checking those matter s by visual inspection, inspectors sometimes need three-dimensional (3D) recognitions. Therefore, we developed a prototype system that has only one inspection h ead to obtain 3D measurements. This system is based on our 3DVT (3 Dimensional Visual Testing) technique that we have been developing. This report proposes that prototype measurement head a...
英字タイトル:
Three-Dimensional Measurement System for In-Vessel Visual Inspection

In-Vessel Visual Inspection (IVVI) is usually conducted as indirect visual inspection with remote TV cameras. We often face the following issues in IVVI. When IVVI is conducted at narrow spa ce in the vessel, it is difficult for inspectors to set the cameras to the best position remotely and manually. When the cameras are quickly moved to reduce hours of IVVI, the visibility be comes poor because of motion blurs. For overcoming these problems, we focused on “Super Resolution (SR)” that is one of image proc...
英字タイトル:
In-Vessel Visual Inspection System using Super Resolution Technique

A newly developed in-vessel visual inspection (IVVI) device designed to improve the quality of visual inspection in Boiling Water R eactors (BWRs) while providing significant critical path savings during refueling outages. And Super Resolution Visual Testing (VT) system enhances the inspection image resolution. The system assists the examiners under the condition of relatively faster scanning speed and longer work distance. The effectiveness of the time saving was qualified by the resolution testing with V...
英字タイトル:
Maintenance and Inspection Technologies for Shorter Outage