Murata Manufacturing Co., Ltd.

Akihiko Shibata

Tsuyoshi Suesada

Koji Tanaka

Masaki Takeuchi

Hirofumi Tsuchimoto

Hironori Sakai

Satoshi Shinoda

Hiroaki Ichikawa

Kyoshiro Okude

Sinji Goma

Noromitsu Tsukai

Kiyotaka Asai

Kouki Ejiri

Hidesato Uegaki

A conversion adapter is provided that includes a radio communication unit that receives biological information based on digital data transmitted from an external biological sensor by radio communication; a converter that converts the biological information based on the digital data received by the radio communication unit to biological information based on analog data; a connection unit that is connectable through wire to an external biological information monitor and that outputs the biological information based on the analog data converted by the converter; a power supply unit that supplies power to the radio communication unit and the converter; an operation input that receives operation performed by a user; and a body part provided with the connection unit and the operation part.

Conversion adapter

A power receiving apparatus to which power is transmitted from a power transmission apparatus through electric field coupling includes a parallel resonance circuit in which an active electrode and a passive electrode are connected, a capacitor and a first switch that change a resonance condition of the parallel resonance circuit, and a second switch that supplies or cuts off an AC voltage, outputted from the parallel resonance circuit, to or from a load. The power receiving apparatus also includes a communication unit that notifies of the start of communication with the power transmission apparatus and receives a response to the notification, a first switching unit that generates a signal to be sent to the power transmission apparatus, and a second switching unit that connects or disconnects the second switch based on the response received by the communication unit.

Power receiving apparatus and power transmission system

An electric power transmitting apparatus and a method for controlling electric power transmission that switches a connection state of a coupling electrode in accordance with the shape and the size of an electric power receiving apparatus, and a position where the electric power receiving apparatus is placed.

Electric power transmitting apparatus and method for controlling electric power transmission

A fall detection device that is allowed to reduce the processing load put when making a determination using software, to reliably determine the start of a fall, and to make a fall prediction as necessary, and a magnetic disk drive and a portable electronic apparatus that each include the fall detection device are configured. Accelerations are obtained in three orthogonal axis directions (a, a, a), and an evaluation value is obtained with respect to each of the accelerations (a, a, a) on the basis of an evaluation function, by which an evaluation value is increased as the difference increases between accelerations (a, a, a) at a steady time and accelerations (a, a, a) at a fall determination time, and whether a fall has started is determined on the basis of whether this evaluation value exceeds a predetermined value.

Fall detection device, magnetic disk drive, and portable electronic apparatus

By detecting that a differentiation value of the absolute value of acceleration is lower than a negative threshold value DAthin a negative direction from a first stage (S: Stationary state) where the differentiation value of the absolute value of acceleration is approximately 0, it is considered that the stage is in a second stage (S: Fall start state). When the absolute value of acceleration after that has become lower from a threshold value Ath, it is considered that the fall detection device has entered a third stage (S: Low gravity state). When the low gravity state has continued for a given time T, it is considered that the stage is in a fourth stage (S: Falling state), and a fall detection signal is output. Thus, the processing load when the determination is performed by software is reduced and the prediction of a fall can be performed.

Fall detection device, magnetic disk device, and portable electronic apparatus

A piezoelectric resonator using an n -order mode of a thickness longitudinal vibration or a thickness-shear vibration includes a vibrating section having a piezoelectric layer, a pair of electrodes and a support member for holding the vibrating section. The pair of electrodes are provided on opposite sides of the piezoelectric layer, respectively, and the pair of electrodes partially overlap with each other via the piezoelectric layer to define an opposite electrode portion. The support member holds the vibrating section such that the vibrating section vibrates under an n -order mode of a thickness longitudinal vibration or a thickness-shear vibration. The opposite electrode portion preferably has a substantially circular shape having a radius r or is a polygonal shape circumscribing the substantially circular shape. The radius r satisfies the inequality 20t/n&lE;r, where t is a thickness of the vibrating section.

Piezoelectric resonator with electrode radius related to resonator thickness and vibration mode, and filter using the same

A piezoelectric resonator using a thickness extensional vibration mode, comprises a vibrator portion made up of two or more layers of piezoelectric thin-films where the piezoelectric thin-films and a plurality of insulating thin films are alternately laminated. An alternating voltage is independently applied to each layer of the piezoelectric thin-films for a higher-order vibration mode to be dominantly excited.

Growing community of inventors

Nagaokakyo, Japan

Akihiko Shibata