ELECTROMAGNETIC INTERFERENCE
SHINICHI AKAO – SENIOR RESEARCHER, INSTITUTE OF TECHNOLOGY, SUMITOMO MITSUI CONSTRUCTION CO RYOSAKU KAJI – SENIOR RESEARCHER, INTELLIGENT SYSTEMS RESEARCH INSTITUTE TAKAHARU KAWASE - RESEARCHER, NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY TETSUO KOTOKU – INNOVATION CO-ORDINATOR, AIST; YOSHINAO OHKAWA – TECHNICAL ADVISOR, KANDENKO CO KEISUKE IZUMI & TAKASHI TSUCHIDA – TEAM LEADERS, R&D DIVISION, KANDENKO CO
Avoiding electro- magnetic interference
It is essential for medical and welfare establishments to have electronic devices that work stably and to secure and maintain an electromagnetic environment that allows their safe and stable operation. This article will consider lightning and inverter noise, which are typical electromagnetic problems and ways to protect against them.
Advanced facilities with increasingly higher functionality are being introduced into medical practice, the electronic processing of medical information is quickly expanding and caretaker robots are expected to become a daily reality because of a shortage of human resources. The use of inverters in building facilities is also increasing to reduce energy consumption. However, since inverters emit electromagnetic noise, they can disturb the safe and stable operation of high precision equipment. It is therefore essential to have electronic devices that
work stably and to secure and maintain an electromagnetic environment that allows their safe and stable operation. While the rules for safe operation have
been studied and established in relation mainly to their co-existence with equipment that emits radio waves such as medical telemeters, wireless LANs and mobile phones, new rules are also required to take into account stray radio waves or electromagnetic noise (such as radiation and conduction noise). For this reason, it is necessary to review the electromagnetic environment, taking into
account the entire building, including the frame and the infrastructure, such as the power supply system, lighting, air conditioning and elevators. The Consortium on Dependable
Electromagnetic Environment of the National Institute of Advanced Industrial Science and Technology (AIST) studied and publicised the Utilization Space Guidelines for Robot Technology and Information and Communication Technology.1,2
This paper
presents an overview of how to provide a better electromagnetic environment as proposed in the guidelines.
Shinichi Akao
Ryosaku Kaji Keisuke Izumi
•Shinichi Akao works in research and development in the fields of building acoustics, noise control and the electromagnetic environment. He completed a PhD in architecture at the Graduate School of Engineering, Toyo University, Tokyo and joined the Institute of Technology, Mitsui Construction Co (now Sumitomo Mitsui Construction Co) in 1982. He is a member of the Architectural Institute of Japan (AIJ). •Keisuke Izumi is research and development team leader in the research and development division of Kandenko and works mainly in the design and development of building electric equipment. He graduated from the Department of Electronic Systems Engineering, Faculty of Engineering, Tokyo Metropolitan Institute of Technology and joined Kandenko Co in 1993. He is a professional engineer (electric and electronics) and a member of the Institute of Electrical Installation Engineers of Japan (IEEJ) and the Healthcare Engineering Association of Japan (HEAJ).
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Tetsuo Kotoku Takaharu Kawase
•Ryosaku Kaji works in environmental electromagnetics at the Intelligent Systems Research Institute, the National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki. He received a BE, an ME and a PhD in electronic engineering from Hokkaido University, Sapporo in 1991, 1993 and 1996, respectively. •Takaharu Kawase is a researcher at the National Institute of Information and Communications Technology (NICT), Tokyo, Japan. His research interests include the building of electromagnetic environments and its applied technology for information and communication technology. He received an MSc and a PhD in geophysics from The University of Tokyo, Japan in 1991 and 1995 respectively. He joined the Institute of Technology of Tokyu Construction Co, Kanagawa, Japan, in 1995 and is a member of the AIJ. •Tetsuo Kotoku is innovation co-ordinator at the AIST. He received an ME and a PhD in mathematical engineering and information
Takashi Tsuchida Yoshinao Ohkawa
physics from the University of Tokyo in 1988 and 1998, respectively. •Yoshinao Ohkawa is technical advisor at Kandenko and is engaged in the earth simulator, the Japan Proton Accelerator Research Complex (J-PARC) and Conceptual Design Activity (CDA) and Engineering Design Activity (EDA) for the Fusion Energy Test Reactor (ITER). He completed the electric engineering course at Tokyo Denki University High School and joined Kanto Electric Construction Co (now Kandenko Co) in 1962. •Takashi Tsuchida joined Kandenko Co in 1996 where he is team leader in the research and development division and works in the development of grounding and lightning protection systems. He received a BE and an ME from Tokyo Metropolitan University in 1993 and 1995, respectively and a PhD from Nagaoka University of Technology in 2012. He is a professional engineer (electric and electronics) and a member of the IEEJ and the HEAJ.
IFHE DIGEST 2019
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