Niigata University

Other

Hitachi Chemical Company, Ltd.

Keizo Kato

Futao Kaneko

Takahiro Kawakami

Kazunari Shinbo

Akira Baba

Yasuo Ohdaira

Kenichi Sato

Nobuo Miyadera

Koichi Shimizu

Osamu Hanaoka

Kenta Mizusawa

Shigetoshi Miyazaki

Provided is a simple secondary battery tester that obtains, without applying an AC signal for determination based on capacitance, the capacitance of a secondary battery from time characteristics of a current flowing to the secondary battery and a terminal voltage and determines whether the secondary battery is degraded based on the capacitance thus obtained.

Secondary battery tester

Provided is an SPR sensor which can achieve compaction and multichannel detection by simple configuration at a low cost. The SPR sensor comprises an optical path, and detection areas on the side surface thereof formed by laminating metal layers formed to cause surface plasmon resonance phenomenon. The SPR sensor is characterized in that two or more detection areas are formed for one optical path, a dielectric constant regulation layer is further laminated in at least one of the two or more detection areas, dielectric constant is regulated to have a different surface plasmon resonance in each detection area, and a dielectric constant regulation layer laminated in the at least one of the two or more detection areas functions as a layer exhibiting sensitivity to an object to be detected.

SPR sensor

A substance adsorption detection method and a sensor utilizing amounts of change in the optical characteristic of a sensitive thin film with respect to the adsorbed amount of a substance to be detected. A clad, a core, and a thin filmfor detecting an adsorbed substance are sequentially stacked on a crystal oscillatorto constitute an optical waveguide layerand a gas adsorption member. An incoming light prismand an outgoing light prismare provided on the surface of the core. Changes in the adsorbed mass of the target substance and in the optical characteristic involved can be detected accurately and simultaneously by utilizing a change in outgoing light originating from a change in propagation loss and a change in the oscillation characteristic of the oscillator, both caused by adsorption of the target substance on the core surface.

Crystal oscillator sensor and substance adsorption detection method using the sensor

Growing community of inventors

Niigata, Japan

Keizo Kato