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JRM Vol.37 No.5 pp. 1137-1144
doi: 10.20965/jrm.2025.p1137
(2025)

Paper:

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Identification of Unknown Multiple Radiation Sources Using Change Rate of Gamma Rays with Directional Detector

Hanwool Woo ORCID Icon and Yurika Takahashi

Department of Mechanical Systems Engineering, Faculty of Engineering, Kogakuin University
2665-1 Nakano-machi, Hachioji, Tokyo 192-0015, Japan

Received:
March 6, 2025
Accepted:
May 16, 2025
Published:
October 20, 2025
Creative Commons License
Keywords:
identification of multiple radiation sources, path planning, directional gamma ray detector
Abstract

In this study, we construct a system that autonomously and efficiently generates an exploration path that enables the estimation of the distribution of multiple radiation sources, even when the source intensities are unknown. Although the gamma ray detector cannot directly measure the distance to a radiation source, we estimate this distance by analyzing the rate of change in the number of incident gamma rays and use this to localize the source. By employing this parameter, it becomes possible to accurately estimate the distance between the detector and source, thereby significantly reducing the exploration time required for localization. Additionally, we develop a method for path planning and source localization even when multiple radiation sources are distributed across an area. We verify the validity of the proposed method through simulation experiments.

Exploration for identifying radiation sources

Exploration for identifying radiation sources

Cite this article as:
H. Woo and Y. Takahashi, “Identification of Unknown Multiple Radiation Sources Using Change Rate of Gamma Rays with Directional Detector,” J. Robot. Mechatron., Vol.37 No.5, pp. 1137-1144, 2025.
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Last updated on Oct. 19, 2025