Taiyo Yuden Co., Ltd.

Yosuke Onda

Masashi Hattori

Kenichi Shimomai

Tokihiro Nishihara

Taiji Ito

Tsuyoshi Yokoyama

Yoshiki Iwazaki

Jin Mikata

[Object] To provide an arithmetic device, an arithmetic method, and a gas detection system that are capable of easily correcting deterioration over time of a detection element. [Solving Means] The arithmetic device includes a calculation unit. The calculation unit calculates a correction coefficient from a detection element that causes a resonant frequency change by adsorption of gas on the basis of a resonant frequency change amount associated with a humidity change of the detection element in a degraded state and a resonant frequency change amount associated with a humidity change of the detection element in an initial state that was acquired in advance, and corrects the resonant frequency change amount of the detection element in the degraded state by using the correction coefficient.

Arithmetic device, arithmetic method, and gas detection system

An odor is detected with high accuracy. A sensing system includes: a sensor apparatus including a filter to remove an odor-causing substance contained in air and a sensor unit including one or more detection elements to detect an amount of the odor-causing substance contained in air; and an information processing apparatus including a difference calculation unit to calculate a difference between a detection value of each of the one or more detection elements, the detection value indicating an amount of the odor-causing substance contained in air that has passed through the filter and a detection value of each of the one or more detection elements, the detection value indicating an amount of the odor-causing substance contained in air that has not passed through the filter, and a determination unit to determine an odor of air based on the calculated difference.

Sensing system, information processing apparatus, and sensor apparatus

An air conditioning system includes: an air conditioner to regulate a state of air in a room; a sensor device including at least one detector to detect an amount of an odor-causing substance included in the air in the room; and a control device to control operation of the air conditioner. The control device includes: a first acquisition unit to acquire a detected value of each of the at least one detector at a first timing when a person is present in the room; a second acquisition unit to acquire a detected value of each of the at least one detector at a second timing later than the first timing; a difference calculator to calculate a difference between the detected value at the first timing and the detected value at the second timing; and an instruction unit to control operation of the air conditioner based on the difference.

Air conditioning system, vehicle, control device, and control method

An acoustic wave device includes: a piezoelectric film made of an aluminum nitride film containing a divalent element and a tetravalent element, or a divalent element and a pentavalent element; and an electrode that excites an acoustic wave propagating through the piezoelectric film.

Acoustic wave device

A piezoelectric thin film resonator includes: a substrate; a piezoelectric film that is located on the substrate and includes a first film made of an aluminum nitride film containing an additive element and second films located on an upper surface and a lower surface of the first film and made of an aluminum nitride film containing the additive element at a concentration lower than that of the first film; and a lower electrode and an upper electrode that are located to sandwich the piezoelectric film.

Growing community of inventors

Takasaki, Japan

Yosuke Onda