著者

筑紫 彰太 山内 統広 田村 雄介 山川 博司 永谷 圭司 藤井 浩光 千葉 拓史 山本 新吾 茶山 和博 山下 淳 淺間 一

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.86, no.12, pp.1057-1063, 2020-12-05 (Released:2020-12-05)

参考文献数

22

---

In the event of a disaster, unmanned construction with remotely operated construction machinery is critical for quick disaster recovery. Those machines can weight up to several tons and can easily sink on inadequate soil. Therefore, it is important to judge the trafficability of remotely operated construction machinery at a disaster site. In this research, we propose a non-contact method for judging trafficability. The proposed method classifies the soil type and estimates the water content using spectral images. The cone index is then estimated and the trafficability is judged from the cone index. As experiment, we judged the trafficability for a real construction machine using the proposed method. The results showed the effectiveness of the proposed method based on soil type classification and water content estimation.

著者

樋口 寛 藤井 浩光 谷口 敦史 渡辺 正浩 山下 淳 淺間 一

出版者

一般社団法人 日本ロボット学会

雑誌

日本ロボット学会誌 (ISSN:02891824)

巻号頁・発行日

vol.36, no.3, pp.222-232, 2018 (Released:2018-05-15)

参考文献数

21

---

This paper presents an effective 3D measurement method from the inside of large structures such as railway vehicles, elevators, and escalators. In our proposed method, images are captured by a moving measurement device, which is composed of a ring laser and a camera, from the inside of the target object. Structures of the target are reconstructed from these images by integrating cross-section shapes, obtained by the light-section method, into unified coordinate by pose changes estimated by Structure from Motion (SfM). We focus on the method to extract information necessary for the light-section method and SfM from the captured images which contain both laser light and texture information. A color filter used in the proposed method enables to extract areas irradiated by the laser for the light-section method. Further, a new block matching technique is introduced to avoid the influence of the laser light, which causes to detect wrong corresponding points. In experiments, we confirmed the validity of the proposed 3D measurement method.