著者
西田 佳史 武田 正資 森 武俊 溝口 博 佐藤 知正
出版者
The Robotics Society of Japan
雑誌
日本ロボット学会誌 (ISSN:02891824)
巻号頁・発行日
vol.16, no.5, pp.705-711, 1998-07-15 (Released:2010-08-25)
参考文献数
14
被引用文献数
18 28

This paper proposes a monitoring system for a human respiration and posture in sleep using pressure sensor array. The proposed system consists of 221 pressure sensors (Force Sensing Resistors: FSRs) attached to the surface of the bed. Each sensor of the pressure sensor array is set 5 [cm] apart. The novel features of the proposed system lie in non-invasive and unrestrained monitoring of the human respiration and posture. Non-invasive monitoring eliminates the need for monitoring needles or catheters to invade the human body, sensors thus do not impose a physiological burden such as pain on him or her. In unrestrained monitoring, sensors and their electrical cords do not limit degrees of freedom of his or her movement. Unrestrained sensing therefore does not impose a psychological burden caused by the limitations on him or her. Experimental results demonstrate that the proposed system is feasible for monitoring a human respiration and posture for over 6 hours.
著者
友納 正裕
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.37, no.9, pp.864-872, 2019 (Released:2019-11-16)
参考文献数
13

This paper presents a map-merging method which enables the robot to continue working for months and years. The proposed method merges a reference map and the current map to create a new reference map for the next use. Consistency check for map merging is performed using pseudo χ2 test. After map merging, the method reduces the map size by removing redundant data in the pose graph and point cloud for long-term map maintenance. Experiments show the proposed method successfully merges maps and reduces the map size.
著者
垣尾 政之 宮下 敬宏 光永 法明 石黒 浩 萩田 紀博
出版者
The Robotics Society of Japan
雑誌
日本ロボット学会誌 (ISSN:02891824)
巻号頁・発行日
vol.26, no.6, pp.485-492, 2008-09-15 (Released:2010-08-25)
参考文献数
17
被引用文献数
1 2

Humans always sway their body when they are standing. Since the swaying is natural for human, they are not conscious of the swaying. However, today, almost all robots are designed to reduce the swaying to ensure stabilities. If communication robots can control the swaying appropriately, it might help humans to anthropomorphize the robot. In this paper, we evaluate how the swaying of a humanoid robot affects human swaying and their impressions. We measured human and robot's neck movement and asked them to answer a questionnaire after the experiments. We discovered that human swaying and impressions were affected by the robot's swaying. Human swaying is always observed whenever communications are performed. In order to apply the swaying to humanoid robots, we only use wheel control. Additionally, we can make the robot's swaying and do other actions on their upper bodies. So the result of this paper will explain how to make robots' swaying.
著者
小谷内 範穗 安達 弘典 新井 健生
出版者
The Robotics Society of Japan
雑誌
日本ロボット学会誌 (ISSN:02891824)
巻号頁・発行日
vol.14, no.7, pp.968-976, 1996-10-15 (Released:2010-08-25)
参考文献数
18
被引用文献数
5 7

Human works like handling objects, carrying loads, assembling parts, and cutting parts, are completed by the combination of both leg locomotion and hand manipulation, in the various fields of construction, agricultural fields, factory, and home. The authors propose a new concept for the integration of locomotion and manipulation, “the Integrated Limb Mechanism.” The concept covers the technical fields both of the control integration and of the mechanism integration necessary for the practical working robot.Here, a six-bar linkage mechanism with four degrees of freedom is introduced as an example of integrated limb mechanism with both advantages in leg and in arm with consideration for mechanical design. Computer simulation with the dynamic model is performed to verify the transformability from leg posture into arm posture of the mechanism. The kinematic analysis by the manipulatability ellipsoid is done to evaluate the different motion rates between the leg posture and the arm posture. Some useful tasks are considered suitable to the mechanism.
著者
青沼 仁志
出版者
The Robotics Society of Japan
雑誌
日本ロボット学会誌 (ISSN:02891824)
巻号頁・発行日
vol.23, no.1, pp.6-10, 2005-01-15 (Released:2010-08-25)
参考文献数
15
被引用文献数
2 2
著者
金子 真 横井 一仁 鈴木 夏夫 谷江 和雄
出版者
The Robotics Society of Japan
雑誌
日本ロボット学会誌 (ISSN:02891824)
巻号頁・発行日
vol.7, no.1, pp.62-70, 1989-02-15 (Released:2010-08-25)
参考文献数
12
被引用文献数
1 1

プーリ・ワイヤ駆動系におけるトルクセンシングはこれまでプーリ両端のワイヤにそれぞれ張力センサを押し付けることにより行なわれていた.この万法では対応するトルクは2つの張力信号をアナログ演算回路に入れ両者の差をとることにより得られるため, 原理的に1軸あおり2個の張力センサを必要としていた.さらにこの方法はたとえ駆動トルクがプーリに作用していなくてもワイヤ張力に比例したバイアス力がセンサ部に作用するため, 残留応力やダイナミックレンジが広くとれないなどの欠点を有していた.本論文では駆動軸回りに発生するトルクがプーリ両端の張力差に比例することに着目して張力差動形のトルクセンサを提案している.次にトルクサーボ系を設計する上で重要な指標となるセンサの等価回転剛性を導入し, センサの幾何学的パラメータや外界の剛性がサーボ系のループゲインに及ぼす影響について, アームの慣性モーメントが無視できるという仮定のもとで考察している.
著者
中村 仁彦 関口 暁宣
出版者
The Robotics Society of Japan
雑誌
日本ロボット学会誌 (ISSN:02891824)
巻号頁・発行日
vol.15, no.6, pp.918-926, 1997-09-15 (Released:2010-08-25)
参考文献数
10
被引用文献数
1 2

Chaos represents one of mysterious rich behaviors of nonlinear dynamical systems. A lot of research efforts have been done for mathematical theory behind chaos. In this paper, we develop a method to provide a mobile robot with the chaotic nature. The chaotic mobile robot implies a mobile robot with a controller that ensures chaotic motion. According to the phase tansitivity, one of the two basic features with the sharp dependence on initial condition that characterize chaos, the chaotic mobile robot is guaranteed to scan the whole connected work space. For scanning motion, the chaotic robot does not require the map of work space. It only requires to measure the normal of boundary when it comes close. A mobile robot with such characteristics may find its applications as a patrol robot or a cleaning robot in a closed floor or building. The sharp dependence on initial condition also yields a favourable nature as a patrol robot since the scanning trajectory becomes highly unpredictable. We design the controller such that the total dynamics of mobile robot is represented by the Arnold equation, which is known to show the behavior of non-compressive perfect fluid. Experimental results illustrate the usefulness of the proposed controller.
著者
鴨井 良介 佐藤 圭祐 酒井 英明 竹山 信一
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.28, no.8, pp.915-922, 2010 (Released:2012-01-25)
参考文献数
12
被引用文献数
2

In this paper, we propose a fast motion planning method for 6 DOF manipulator based on a maze-searching algorithm. Proposed method is utilizing the CPFS (Closest Point First Search) algorithm similar to the Bug2 algorithm proposed by Lumelsky. We have modified CPFS algorithm with FAP (Footprint Avoidance Procedure) in order to guarantee that the planning does not fall into the deadlock situation. At the beginning of the planning, the initial configuration of 6 DOF robot moves straight toward goal configuration . When the path meets collision configuration, the path is generated along the boundary between free- and collision-configuration. Using computer simulation, we evaluate the proposed method with calculation time. As a result, the proposed method can generate a path with 10 times shorter than the RRT method.
著者
田島 不二夫 下山 勲 三浦 宏文
出版者
The Robotics Society of Japan
雑誌
日本ロボット学会誌 (ISSN:02891824)
巻号頁・発行日
vol.6, no.5, pp.393-396, 1988-10-15 (Released:2010-08-25)
参考文献数
5

作業者と作業対象物とのインタラクションを表現するインピーダンス・モデルがHoganによって提案されている.これを「こま回し」に適用し, モデルの係数を位置情報のみをもとに同定する.同定された係数を用いて, 観測された作業者の手先軌道をマニピュレータが再現可能なものへと再構成する方法を述べる.
著者
大西 献 光畑 幸史 宿谷 光司 池田 健太郎 森家 康文
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.33, no.6, pp.460-469, 2015 (Released:2015-08-15)
参考文献数
25

Operativity will be spoiled if the thick cable of an end effector is in the exterior of a manipulator. The less wiring device adapting Power Line Communication technology has been developed. Transmission of the information and transfer of power on an end effector are realizable with one pair of twisted pair wires. The technical details, peripheral technology, example of application and future subjects of this device which can be used, such as not only a robot but onboard equipment and plant apparatus, are reported.