Niigata University

Other

Hitachi Chemical Company, Ltd.

Pcn Corporation

Takahiro Kawakami

Futao Kaneko

Keizo Kato

Kazunari Shinbo

Yasuo Ohdaira

Akira Baba

Kenichi Sato

Nobuo Miyadera

Koichi Shimizu

Osamu Hanaoka

Kenta Mizusawa

Shigetoshi Miyazaki

Koroku Ishida

Sumio Homma

Shigeki Homma, Legal Representative

Toshiko Homma, Legal Representative

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 battery management device is provided for accurately measuring in a simple manner the internal resistance (reciprocal of conductance) of a battery that serves as the determination reference of the deterioration level of a battery without the application of an AC voltage to the battery while the battery remains onboard, and determining and displaying the deterioration level of the onboard battery. The onboard battery management device has sensorsandfor measuring terminal voltage and current of an onboard battery; a computation processorfor determining the deterioration level of a battery (as well as for calculating and determining the internal resistance on the basis of the measured value); and a display unitof the battery state, wherein the internal resistance is determined based on an AC voltage component and an AC electric current component that are calculated by performing differential processing or subtractive processing on the voltage value and electric current value of the onboard battery during engine operation measured without the application of an AC signal from a sensor terminal; and the DC component, the low-frequency component, and the high-frequency component are removed using a filter circuit to determine the deterioration level.

Onboard battery management device

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

Takahiro Kawakami