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Journal Articles

Distance information display system for supporting decommissioning work of nuclear power plants

Miki, Naoya*; Harazono, Yuki*; Ishii, Hirotake*; Shimoda, Hiroshi*; Koda, Yuya

International Electronic Journal of Nuclear Safety and Simulation (Internet), 9(2), p.162 - 171, 2018/12

Kyoto University reports on the distance information display system developed in collaboration between "Fugen" and Kyoto University. In the distance information display system, the worker can easily measure the distance of the object. In this presentation, we report the test results carried out with "Fugen" and the questionnaire results of the subjects.

Journal Articles

Distance Information Display System using augmented reality for supporting decommissioning work

Miki, Naoya*; Harazono, Yuki*; Ishii, Hirotake*; Shimoda, Hiroshi*; Koda, Yuya

Proceedings of 2nd International Conference on Computer-Human Interaction Research and Applications (CHIRA 2018) (USB Flash Drive), p.134 - 140, 2018/09

In this study, in order to make measuring lengths of the objects and the gaps at NPPs more efficient, the Distance Information Display System was developed, which make it easy for the dismantling workers to measure them. The results showed that the Distance Information Display System developed in this study can be used easily with extremely simple operation by the dismantling workers at NPPs, and the workers can also measure the lengths in a short time.

Journal Articles

Plant maintenance and dismantling work support based on three-dimensional scanning technology

Ishii, Hirotake*

International Electronic Journal of Nuclear Safety and Simulation (Internet), 4(2), p.97 - 104, 2013/06

Recent progress of computer vision and micro-fabrication technologies has greatly reduced the cost and difficulty of three-dimensional modeling of maintenance and decommissioning work environments. This article presents recent progress of three-dimensional scanning technologies and their possible application to enhance safety and efficiency during plant maintenance and decommissioning.

Journal Articles

Development of a tracking method for augmented reality applied to NPP maintenance work and its experimental evaluation

Bian, Z.*; Ishii, Hirotake*; Shimoda, Hiroshi*; Yoshikawa, Hidekazu*; Morishita, Yoshitsugu; Kanehira, Yoshiki; Izumi, Masanori

IEICE Transactions on Information and Systems, E90-D(6), p.963 - 974, 2007/06

 Times Cited Count:3 Percentile:70.77(Computer Science, Information Systems)

This study designed linecode marker, a new type of paper-based marker and proposed recognition, tracking algorithm for it in order to resolve these problems. In comparison of the conventional paper-based markers, such as square markers, circle markers, the linecode marker is not only just easier to set up in complex industrial environment, but also makes it possible to use AR in industrial plant. In order to evaluate the tracking accuracy, trackable distance of the proposed tracking method, an evaluation experiment was conducted in a large room. The experiment results show that: comparing with traditional marker-based tracking method, tracking possible distance extends extremely; tracking accuracy improved to a level of 20cm in 10m distance.

Oral presentation

Development of a tracking method for augmented reality applied to NPP maintenance work and its experimental evaluation

Bian, Z.*; Ishii, Hirotake*; Izumi, Masanori

no journal, , 

This study designed linecode marker, a new type of paper-based marker and proposed recognition, tracking algorithm for it in order to resolve these problems. In comparison of the conventional paper-based markers, such as square markers, circle markers, the linecode marker is not only just easier to set up in complex industrial environment, but also makes it possible to use AR in industrial plant. In order to evaluate the tracking accuracy, trackable distance of the proposed tracking method, an evaluation experiment was conducted in a large room. The experiment results show that: comparing with traditional marker-based tracking method, tracking possible distance extends extremely; tracking accuracy improved to a level of 20cm in 10m distance.

Oral presentation

Development and evaluation of tracking method for augmented reality system for nuclear power plant maintenance support

Ishii, Hirotake*; Bian, Z.*; Sekiyama, Tomoki*; Shimoda, Hiroshi*; Yoshikawa, Hidekazu*; Izumi, Masanori; Kanehira, Yoshiki; Morishita, Yoshitsugu

no journal, , 

This study is to development of line-marker and hybrid tracking technology including Multi camera and gyro sensor. Evaluation experiment for new tracking technology is conducted in Nuclear power plant.

Oral presentation

Proposal and evaluation of decommissioning support method of nuclear power plants using augmented reality

Ishii, Hirotake*; Shimoda, Hiroshi*; Bian, Z.*; Nakai, Toshinori*; Izumi, Masanori; Morishita, Yoshitsugu; Kanehira, Yoshiki*

no journal, , 

A support method of decommissioning work of nuclear power plants using Augmented Reality was proposed and a prototype system was developed. Then, using the prototype system, the proposed method was evaluated. Three workers used the prototype system along with a scenario which dismantles an ion tower, and then questionnaire and interview investigation was conducted. As the results, it was found that the proposed method that records the cutting parts on the CAD data using a stylus pen was easy and effective compared to the legacy recording method using paper documents, but a new tablet PC that has a larger screen with lighter weight is necessary in order to apply the proposed method to the real decommissioning work.

Oral presentation

Development of worksite visualization system for Fugen NPS, 1; Development of hybrid tracking technique

Shimoda, Hiroshi*; Ishii, Hirotake*; Sekiyama, Tomoki*; Bian, Z.*; Izumi, Masanori; Morishita, Yoshitsugu

no journal, , 

This study aims at developing an augmented reality system to support maintenance work of nuclear power plants. An accurate and wide-range tracking method is required as a key technology in order to realize the system. In this study, a new tracking method using multi-camera and gyro sensor has been developed in order to enlarge the area where the tracking is available with limited number of markers. Experimental evaluation result shows that the area where the developed method can cover is about 3 times larger than the method using single camera.

Oral presentation

Development of worksite visualization system for Fugen NPS, 2; Marker arrangement optimization using generic algorithm

Ishii, Hirotake*; Shimoda, Hiroshi*; Bian, Z.*; Izumi, Masanori; Morishita, Yoshitsugu

no journal, , 

Improvement of tracking accuracy is an important issue when applying augmented reality to nuclear power plant fieldwork. Tracking accuracy depends highly on the marker arrangement when employing a tracking method using a camera and markers. Tracking accuracy becomes low if markers are pasted arbitrarily only on places that are easy to paste them onto. For those reasons, this study develops a marker arrangement optimization algorithm based on genetic algorithms. Tracking error caused by finite camera resolution is considered particularly in this study. A wheel tracking error computation method is developed to compute the tracking error from the marker arrangement. A genetic algorithm is adopted for obtaining higher tracking accuracy from an initial pool of marker arrangements using wheel tracking error computation as a fitness function. Trial results show that the tracking accuracy can be improved markedly by applying the marker arrangement optimization algorithm.

Oral presentation

Augmented reality applications for nuclear power plant maintenance work

Ishii, Hirotake*; Bian, Z.*; Sekiyama, Tomoki*; Nakai, Toshinori*; Shimoda, Hiroshi*; Izumi, Masanori; Morishita, Yoshitsugu

no journal, , 

Augmented Reality is one of the promising technologies that will be able to improve efficiency and safety of the nuclear power plant maintenance work. In order to apply the Augmented Reality to the maintenance work, various studies must be done, such as improvement of the tracking technology, improvement of the user interface and human centered evaluation of the Augmented Reality system. The authors have conducted several studies of these issues for almost 5 years. In this paper, a part of these studies are reported.

Oral presentation

A Feasibility study of decommissioning support method by augmented reality

Shimoda, Hiroshi*; Nakai, Toshinori*; Ishii, Hirotake*; Bian, Z.*; Izumi, Masanori; Morishita, Yoshitsugu

no journal, , 

A support method of decommissioning work of nuclear power plants using Augmented Reality was proposed and a prototype system was developed. Then, using the prototype system, the proposed method was evaluated. Three professionals used the prototype system along with a scenario which dismantles an ion tower,and then questionnaire and interview investigation was conducted. As the results, it was found that the proposed method that records the cutting parts on the CAD data using a stylus pen was easy and effective compared with the legacy recording method using paper instruction sheet, however a new tablet PC that has a larger screen with lighter weight is necessary in order to apply the proposed method to the real decommissioning work.

Oral presentation

Development of worksite visualization system for Fugen NPS, 3; Application for actual dismantlement works

Izumi, Masanori; Morishita, Yoshitsugu; Shimoda, Hiroshi*; Ishii, Hirotake*; Nakai, Toshinori*; Bian, Z.*

no journal, , 

A support method of decommissioning work of nuclear power plants using Augmented Reality was proposed and a prototype system was developed. Then, using the prototype system, the proposed method was evaluated. Three workers used the prototype system along with a scenario which dismantles an ion tower, and then questionnaire and interview investigation was conducted. As the results, it was found that the proposed method that records the cutting parts on the CAD data using a stylus pen was easy and effective compared to the legacy recording method using paper documents, but a new tablet PC that has a larger screen with lighter weight is necessary in order to apply the proposed method to the real decommissioning work.

Oral presentation

The Development of the work support system using AR technology

Ishii, Hirotake*; Koda, Yuya

no journal, , 

no abstracts in English

Oral presentation

Development of an information reference system using reconstruction model and augmented reality

Harazono, Yuki*; Kimura, Taro*; Ishii, Hirotake*; Shimoda, Hiroshi*; Koda, Yuya

no journal, , 

no abstracts in English

Oral presentation

Development for AR tracking at FUGEN

Taruta, Yasuyoshi; Harazono, Yuki*; Ishii, Hirotake*; Koda, Yuya; Tomoda, Koichi

no journal, , 

no abstracts in English

15 (Records 1-15 displayed on this page)
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