地震防災用リレーにおける表面改質の研究

概要

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This paper describes a study of the surface modification of the relays used for earthquake disasters. Large-scale earthquakes occur frequently in Japan, and cause serious damage on each occasion. This is often due to the fact that fires caused by electric appliances are serious. To minimize this possibility, relays, which ensure safety in the event of earthquake disasters, are effective. Therefore, this paper examines the reactions between the values of currents and the extent of vibrations sustained by relays, which are there to guard against earthquake disasters, over their life span. The surface of the contact spot can be observed, from the micro-meter to nano-meter scale, with the atomic force microscope (AFM). Based on the results, this paper considers improved reliability and decision making concerning the stable and usable range of the relays used to prevent earthquake disasters, and to a fathomable degree that gold-plated detachment in the surface of the contact spot caused malfunctions.