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Quadruped Walking Robot with Multi PIC microcomputer system
Yoshihiko Takahashi,Mitsuyasu Watanabe,Shingo Tsuchiya 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
We propose a multi PIC microcomputer system for a quadruped waking robot using eight degrees of freedom. The control system has a two-level hierarchy in which one PIC microcomputer is used as a master computer, and eight PIC microcomputers are used as slave computers. Three bits are used to communicate between the master and slave computers. We have verified from experiments that this multi PIC microcomputer system is functional.
Fabrication of Simple Robot Face Regarding Experimental Results of Human Facial Expressions
Yoshihiko Takahashi,Masanori Hatakeyama 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
A new care taking system using a simplified robot face has been developed. Patients’health care data can be stored on a personal computer and the robotic system can take various actions depending on the stored data. For example, it can tell a patient when it is time to take his or her medication or alert them if they fail to take their medication at the appropriate time. The robotic system communicates with patients using facial expressions, a voice communication system and a computer monitor. A robotic face was designed using simple mechanisms in order to produce a low cost system. The facial impressions of the simplified robot have been categorized by surveying over 500 people. In this paper, experiments on human facial expressions are conducted in order to improve our simplified robot face used for the care taking system, and the simple robot face is fabricated according to the experimental results.
Hybrid Robotic Wheelchair with Photovoltanic Solar Cell and Fuel Cell
Yoshihiko Takahashi,Shogo Matsuo,Kei Kawakami 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
A hybrid robotic wheelchair powered by three energy sources, a battery, a photovoltanic solar cell, and a hydrogen fuel cell is proposed in this paper. The advantage of using a photovoltanic solar cell (a solar panel) is that it produces power without requiring use of fossil fuels. The advantage of using a fuel cell is that a hydrogen tank may be changed quickly and easily. We also propose an energy control system which is able to select the energy source optimally according to the operating conditions. The control system ideally gives priority to the photovoltanic solar cells before the fuel cell. When conditions allow for abundant sun light, the photovoltanic solar cell is used. When solar energy is not available, the fuel cell is used. Finally, when the hydrogen is depleted, the battery is used. This paper explains the concept of the hybrid robotic wheelchair, the mechanical design, the energy control system, and the experimental results on the energy source selection.
Compact Robot Face with Simple Mechanical Components
Yoshihiko Takahashi,Hayato Sato 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
We are developing a robotic face which may be utilized to assist patients in various health care applications. For example, a system which can monitor whether the patient has conformed to their scheduled medication regimen, and prompts patients when and how much to take their next scheduled dosage. Health care data for patients using the system is stored in a computer which determines the actions of the robotic system. The system informs the patient of the times it is necessary for them to consume their medicine and alerts them if they fail to follow their schedule. The robotic system communicates with patients using facial expressions, a voice communication system and a computer monitor. A robot face was designed using simple mechanisms in order to achieve a low cost system. We have designed four robot faces. The first two models were relatively large (30cmx30cmx30cm) using LEGO MINDSTORMS components and DC motors. The third and fourth models were smaller (12cmx12cmx3cm) because we used BioMetal Helix components from the TOKI Corporation. The fourth is an improved model of the third. In this paper, we will explain the design of this fourth model.
Yoshihiko TAKAHASHI,Takeharu HAYASHI,Yasunori TAKEMURA,Keigo HARA,Satoru YAMAGUCHI 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
Many skills such as machine design, electronic circuit design, microcomputer programming are taught in mechatronics lectures at universities. Parts are given and students assemble the parts according to set examples. However, students cannot develop creativity simply by following fixed examples. In order to foster creativity, it is necessary to make mechatronic systems based on students’ own ideas. Students also need to study production costs, schedule management, team work etc. These skills are important when becoming engineers in companies after graduation. In order that students can use their own ideas, fabricate mechatronic systems, understand production costs, deal with deadlines and develop a team ethos, we have started a compact electric vehicle competition, named “pico-EV Eco Challenge”, and implemented it. In the competition, a one person small electric vehicle using only small rechargeable batteries (7.2V, 1000mAh in total) is fabricated and runs a 60m circuit. In this paper, the history, regulation and management of the competition, examples of participating vehicles, results and benefits of participation, etc. are discussed.
Yoshihiko Nanasato,Ken-ichi Konagaya,Ayako Okuzaki,Mai Tsuda,Yutaka Tabei 한국식물생명공학회 2013 Plant biotechnology reports Vol.7 No.3
An improved method for genetic transformationof cucumber (Cucumis sativus L. cv. Shinhokusei No. 1) wasdeveloped. Vacuum infiltration of cotyledonary explantswith Agrobacterium suspension enhanced the efficiency ofAgrobacterium infection in the proximal regions of explants. Co-cultivation on filter paper wicks suppressed necrosis ofexplants, leading to increased regeneration efficiency. Putative transgenic plants were screened by kanamycinresistance and green fluorescent protein (GFP) fluorescence,and integration of the transgene into the cucumber genomewas confirmed by genomic polymerase chain reaction(PCR) and Southern blotting. These transgenic plants grewnormally and T1 seeds were obtained from 7 lines. Finally,stable integration and transmission of the transgene in T1generations were confirmed by GFP fluorescence andgenomic PCR. The average transgenic efficiency for producingcucumbers with our method was 11.9 ± 3.5 %,which is among the highest values reported until date usingkanamycin as a selective agent.
Yoshihiko Takahashi,Kazufumi Uda 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
A sustainable education system using electric vehicles is proposed in this paper. University students are able to learn how to use ecological energy sources and the how to design ecological vehicles in step-by-step processes. Three energy sources are considered; sunlight, hydrogen produced from water extracted using sunlight and electrolysis, and bio fuel squeezed from plant seeds. We will explain the three levels of the program to apply to varying skill levels. Students will begin to learn from a basic level.