Activity Report

Activity Report of Open Application Course vol.2

Program for experiment exercises related to advanced Japanese research in mechanical engineering and information electronics

Report from Utsunomiya Campus, Teikyo University

A program made possible by the Sakura Science Exchange Program was held for the seven-day period from May 27 (Mon) to June 2 (Sun). A total of fourteen people from the Republic of Indonesia participated in the program: three to four students from each participating university (President University, Atma Jaya Catholic University of Indonesia, and Darma Persada University) and one teacher. Students from each university participated in two departments of the Faculty of Science and Engineering (the Department of Mechanical and Precision System, and the Department of Information and Electronic Engineering) on the Utsunomiya Campus and joined the laboratory of their instructing professors.

The program was a huge success. For example, despite short period of the program, students were given the opportunity to engage in extensive and fulfilling research. Thanks to this experience, many participating students expressed a strong desire to conduct further research at Teikyo University. We would like to once again express our gratitude towards the Sakura Science Exchange Program, as well as to offer our sincere thanks to the Ministry of Education, Culture, Sports, Science and Technology, participating corporations, and the people of Japan. In the remainder of this article, we will report on some aspects of research at our university.

Report by Professor Akira Kato
Department of Mechanical and Precision System, Faculty of Science and Engineering

One teacher and four students from President University (Indonesia) were invited for a four-day period from May 28 to May 31, 2019. Based on the research theme of “Study on fuel consumption of automobile using actual driving test,” we researched automobile fuel consumption on actual roads, including conducting tests on actual public roads. During the research period, lectures were held on automobile fuel consumption in order to help participants deepen their understanding of technology related to automobile fuel consumption. On the afternoon of May 31, the final day of the research period, we concluded activities by giving a twenty-minute presentation on the research results.

Report by Instructor Takenori Ono
Department of Mechanical and Precision System

We invited three international students (and one supervising instructor) from Darma Persada University (Indonesia) to carry out this program. The main program activities consisted of observing the current research theme of the Ono Laboratory; specifically, the use of an argon ion beam to re-polish (sharpen) monocrystal diamond tools used for mirror cutting of aluminum discs via an ultra-precise front lathe. Participants also observed the cutting characteristics of the tools.

The worn cutting edges of tools can be sharpened through irradiation with a low-energy argon ion beam of 10 keV or less for a long period of time. This method utilizes the phenomenon in which the removal rate (removal amount per unit of time) for material physically removed from the tool surface layer by ion collision changes depending on the ion incidence angle on the surface. The tool is sharpened by selectively removing the inclined surface of the cutting edge which has become rounded due to wear. In this case, changing the incident angle of the beam with respect to the worn part will generate a facet (chamfered part) with a certain angle. We currently aim to clarify the relationship between the current incident angle and the generated facet angle, and develop a tool to suppress cracks in particular when cutting brittle materials.

In the experiment, a cutting test was conducted using two types of tools—a worn tool and a tool that was worn to the same extent and then sharpened with an ion beam. We observed how surface properties and cutting force were affected by sharpening of the blade edge. On the 28th, after explaining an overview of the experiment, we performed a cutting test with a front lathe and used a laser microscope for surface observation. On the 29th, we used a scanning electron microscope (SEM) located in the graduate school building to observe each tool. Finally, based on the measured data and the results of finite element analysis performed in advance of the test, Mr. Ono explained how sharpening the tool improves cutting characteristics to participants; for example, reducing cutting characteristics and stabilizing the amount that the cutting blade cuts in materials.

It seemed that participants were seeing each piece of equipment for the first time and they listened attentively to my explanations. Our university was very satisfied with the results of the program in terms of introducing research. In recent years, factories related to optical equipment and medical equipment have been established in Southeast Asia, including Indonesia. This is increasing the potential demand for precision processing field in university education. Our university will have the opportunity to accept more international students from this area in the future.

Report by Associate Professor Mitsuhiro Ogawa
Department of Information and Electronic Engineering, Faculty of Science and Engineering

Four students and one instructor (total of five participants) from Atma Jaya Catholic University.

May 28:
  • Students were instructed on how to create an electrocardiogram measurement circuit using the instrumentation amplifier INA118.
  • Participants created a circuit diagram using the circuit CAD Fritzing. We also reviewed circuit mounting on the breadboard.
  • Afterwards, we started mounting circuits on the breadboard.
May 29:
  • Continuing from the previous day, students were instructed on how to create an electrocardiogram measurement circuit using the instrumentation amplifier INA118.
  • Completed mounting circuits on the breadboard.
  • Each participating student performed electrocardiogram measurement on themselves using the circuits that they mounted.
  • Based on the measurement results, participants adjusted amplification and added/adjusted analog filter circuits for noise removal.
  • Eventually, all participants were able to perform electrocardiogram measurement using the circuits that they had mounted and adjusted.
May 30:
  • Participants created a presentation on research results.
  • Participants gave a presentation on research results.

In closing, I would like to express my gratitude to all the people involved in this program. I pledge that Teikyo University will continue its efforts to contribute to friendship between Japan and Indonesia, to technological development in both countries and around the world, and to the construction of world peace.

Thank you! Terima kasih!