Faculty Profiles - NISIDA Yuya

Papers - NISIDA Yuya

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Occuluded Object Detection by Ultrasonic Sensors Reviewed

Mochizuki R., Nishida Y., Ishii K.

Proceedings of International Conference on Artificial Life and Robotics 519 - 524 2023.01

A Method to Estimate Reflection Coefficient of Ultrasonic Wave at a Boundary of Two Media Reviewed International journal

Mochizuki Ryuugo, Nishida Yuya, Ishii Kazuo

Journal of Robotics, Networking and Artificial Life ( ALife Robotics Corporation Ltd. ) 9 ( 4 ) 343 - 348 2023.01

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

In food industry, shortage of workers is one of a serious problem. Automation of food handling is a critical nowadays. To alleviate the damage caused by food picking operation by robotic hand, we propose non-contact acoustic impedance estimation with ultrasonic wave, which should be preceded before the picking for optimization of grasp stiffness. We assume the correlation between hardness and acoustic impedance. That is, the harder the medium is, the larger the impedance should be. As cooked food, the unevenness of hardness should be considered. We made samples with media of different acoustic impedances, and experimented with ultrasonic to find the relation between reflection coefficient and hardness. As the result, reflection coefficient increased by 0.03-0.15 at the boundary of two media as the bottom medium is switched from urethane to Aluminum.

DOI： 10.57417/jrnal.9.4_343

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Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85177809111&origin=inward

A Network of Underwater Flow Sensors for Long-term Estimation of Fish Feeding Activity Reviewed International journal

Solpico D., Nishida Y., Mishima K., Ishii K., Suetsugu T., Yatsunami Y.

2023 IEEE International Symposium on Underwater Technology, UT 2023 2023.01

Development of long-term observation system using cable-restricted underwater vehicle Reviewed International journal

Tanaka Y., Nishida Y., Fukuda J., Ishii K.

2023 IEEE International Symposium on Underwater Technology, UT 2023 2023.01

Development of the Autonomous Core Sampling System for AUV Reviewed International journal

Inoue S., Takashima S., Nagano K., Masuda K., Taoka S., Thornton B., Sugimatsu H., Nishida Y., Koike I., Ura T.

2023 IEEE International Symposium on Underwater Technology, UT 2023 2023.01

Experimental Study of Wavelet-OFDM Radio Communication System for AUVs Under Seawater Reviewed International journal

Hasaba R., Eguchi K., Wakisaka T., Satoh H., Hirokawa J., Hirose M., Matsushima T., Fukumoto Y., Nishida Y., Ishii K.

17th European Conference on Antennas and Propagation, EuCAP 2023 2023.01

Fall Risk Estimation for Visually Impaired using iPhone with Li-DAR Reviewed International journal

Katayama Daigo, Ishii Kazuo, Yasukawa Shinsuke, Nishida Yuya, Nakadomari Satoshi

Journal of Robotics, Networking and Artificial Life ( ALife Robotics Corporation Ltd. ) 9 ( 4 ) 349 - 357 2023.01

Language：English Publishing type：Research paper (scientific journal)

We have developed a fall risk alert system using a smartphone with a LiDAR sensor, Apple’s iPhone 12 Pro, as an electronic travel aid (ETA) for visually impaired to reduce fall risks from the edge of station platform and the stairs. The proposed system generates the height grid map generated from 3D point clouds and posture from the smartphone, and classify the walking area to four areas, walkable, positive obstacle, negative obstacle and occlusion areas. In this paper, we describe the algorithm and the experimental results of the environmental recognition system for the fall risk alert. In the experiments, the accuracy, stability, and time delay are evaluat-ed in approaching a fall risk area, such as stairs. The results show the smartphone has the possibility to be the ETA to support the visually impaired and reduce the fall risks.

DOI： 10.57417/jrnal.9.4_349

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Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85163666981&origin=inward

Report on the 8th Tomato-Harvesting Competition toward Smart Agriculture Reviewed

Ishii K., Matsuo T., Takemura Y., Sonoda T., Sanada A., Tominaga M., Nishida Y., Yasukawa S., Shirahashi K., Fujinaga T., Arita D., Kawajiri K., Ohshima K., Okada M.

Proceedings of International Conference on Artificial Life and Robotics 486 - 490 2023.01

Time-Synchronized Projector-Camera System Design and Underwater Sharpening Image Acquisition Experiment Reviewed International journal

Han J., Yamamoto H., Nishida Y., Yasukawa S.

2023 IEEE International Symposium on Underwater Technology, UT 2023 2023.01

Hovering Type AUV ”Tuna-Sand2” Dive Surveys on Seaweed Bed Habitat off Iwakuni.

MIYAKAWA Ryo, NISHIDA Yuya, ISHII Kazuo

The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) ( The Japan Society of Mechanical Engineers ) 2023 ( 0 ) 1A2-C09 2023.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (other academic)

<p>The oceans occupy about 70% of the Earth ’s surface have vast space and mineral, energy, and biological resources. In recent years, AUV has been developed for resource surveys in various sea areas We are working on developing and implementing a robust control system to improve the AUV autonomy and to navigate safely. This paper reports about observation results by hovelling type AUV ”Tuna-Sand2” on seaweed bed habitat off Iwakuni on January 2023 and estimate currents from the dive data to design the observer to estimate currents and implement for AUV. The dive results show that there were Northwesterly current and AUV position is easily affected by current when change target direction.</p>

DOI： 10.1299/jsmermd.2023.1a2-c09

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmermd/2023/0/2023_1A2-C09/_pdf

Long-term observation system using a cable-restricted underwater vehicle

TANAKA Yoshiki, NISHIDA Yuya, FUKUDA Jiro, NAKAMURA Masahiro, ISHII Kazuo

The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) ( The Japan Society of Mechanical Engineers ) 2023 ( 0 ) 1P1-C12 2023.01

Authorship：Corresponding author Language：Japanese Publishing type：Research paper (other academic)

<p>To obtain a long-term data of marine resources which are distributed over a wide area of the deep sea, we have been developed a long-term observation system using cable-restricted underwater vehicle. This paper reports about long-term observation system and its wet test performed at 3 m depth. As an evaluation experiment result, the vehicle tethered by a cable was able to cruise with an error of less than 0.34 m against the planned route. The mosaic image generated based on the captured images was able to measure the width, length, and height of the object with an error of less than 4 cm.</p>

DOI： 10.1299/jsmermd.2023.1p1-c12

CiNii Research

Other Link： https://www.jstage.jst.go.jp/article/jsmermd/2023/0/2023_1P1-C12/_pdf

Digital Transformation of Feeding Control Knowledge in Marine Aquaculture using Current Sensors Reviewed International journal

Solpico Dominic B., Nishida Yuya, Ishii Kazuo

Journal of Robotics, Networking and Artificial Life ( ALife Robotics Corporation Ltd. ) 9 ( 2 ) 143 - 153 2022.09

Authorship：Corresponding author Language：English Publishing type：Research paper (international conference proceedings)

Improving the efficiency of fish feeding contributes to achieving sustainable expansion of the aquaculture industry. However, expert knowledge on feeding remains reliant on experience. This paper presents a new approach of applying digital transformation (DX) on such knowledge by measuring underwater currents induced by fishes as indicator of their hunger. A prototype sensor suite consisting of current sensors, cameras, and an inertial measurement unit (IMU) was constructed to measure the currents around the fish cage, measure the motion of the suite, and record fish activity, particularly during feeding. An initial experiment was performed in two fish cages during feeding activity. Current measurements were collected and analyzed together with the recorded videos to relate the changes in current to the feeding activities. Results suggest that the currents increase around when feeding was started continuously and decline to zero around when it was stopped. However, more data needs to be collected and analyzed for a better understanding of the relationship between the changes in current and fish activities so it can be used to optimize the feeding decisions of fish farmers.

DOI： 10.57417/jrnal.9.2_143

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Toward Smart Tomato Greenhouse Reviewed International journal

Matsuo Takayuki, Takemura Yasunori, Sonoda Takashi, Nishida Yuya, Yasukawa Shinsuke, Ishii Kazuo

Journal of Robotics, Networking and Artificial Life ( ALife Robotics Corporation Ltd. ) 9 ( 1 ) 13 - 19 2022.06

Language：English Publishing type：Research paper (scientific journal)

Agriculture is one of the most important primary industries, however the agricultural workforce in Japan has been decreasing due to the aging, shortage of successors and their heavy work. Smart agriculture and farms, which aim to automate farm work, have been attracting attention for the future sustainable society. We have been organizing the Tomato-Harvesting-Robot Competitions since 2014 to introduce robotic technology and AI into agriculture and promote agricultural technology. The competition consists of a Junior League for young students and a Senior League for general competitors. In this paper, we report the results of the 6th Tomato-Harvesting-Robot Competition and the regulation changes toward practical applications.

DOI： 10.57417/jrnal.9.1_13

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Other Link： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85178282719&origin=inward

テレロボティクスインターフェイスを有した生物捕獲用自律型海中ロボット Reviewed

西田祐也，園田隆，安川真輔，安鍾賢，渡邉啓介，石井和男

海洋調査技術 32 ( 1-2 ) 124 - 129 2022.04

An Estimation Method of Coastal Ocean Debris Using Aerial Drone Reviewed

Kazuo Ishii, Kanako Shirahashi, Yuya Nishida, Moeko Tominaga, Yoshiki Tanaka, Dominic B. Solpico