Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Koichi Ikemoto

Koji Morikawa

Satoshi Kanai

Yasuhiro Shindo

Norimitsu Chinomi

Tsuyoshi Inoue

Fumiyasu Konno

Katsu Takeda

Hirokazu Kitamura

Yasuhiro Hibino

Takahiro Miyatake

Masatoshi Sasaki

Yoshitaka Hirabayashi

Yoshiyuki Kajimoto

A blood pressure estimation apparatus includes: a pulse wave measurement unit measuring a user's pulse wave signal; an electrocardiogram signal measurement unit measuring a user's electrocardiogram signal; and a processing circuit estimating a user's blood pressure value by using the pulse wave and electrocardiogram signals, wherein the processing circuit (a) acquires a pulse wave signal feature by using the pulse wave signal, (b) acquires an electrocardiogram signal feature by using the electrocardiogram signal, (c) acquires a pulse wave propagation time by using the pulse wave and electrocardiogram signals, (d) selects a blood pressure group indicating a relationship between a pulse wave propagation time and blood pressure of the user by using the pulse wave signal feature, electrocardiogram signal feature, and pulse wave propagation time, and (e) estimates the blood pressure value by using the blood pressure group, pulse wave signal feature, electrocardiogram signal feature, and pulse wave propagation time.

Blood pressure estimation apparatus, blood pressure estimation method, and non-transitory computer-readable recording medium

A sensor device includes a plurality of electrode chambers, a measurement chamber, and an accommodation chamber which are connected in annular relationship permitting expansion and contraction. Each of the plurality of electrode chambers has a measurement electrode. The measurement chamber has a biological potential measurement circuit which is connected with each measurement electrode via electrically conductive wiring for measuring biological potential of the user by using the measurement electrode. The accommodation chamber has an internal protrusion. The wiring which connects at least one measurement electrode and the biological potential measurement circuit is provided around the protrusion, the wiring having a length which enables longitudinal feeding in accordance with an amount of elongation when the sensor device is elongated. A maximum clearance S between the accommodation chamber and an adjacent chamber is greater than a maximum clearance R between any two adjacent chambers.

Biological potential input interface system, sensor device, and method

A portable terminal includes a case, a display unit having a display screen exposed from a front surface of the case, and a skin-condition measurement sensor accommodated in the case. The skin-condition measurement sensor includes a measurement unit provided on the front surface of the case. The portable terminal can be carried and operate easily.

Portable terminal and skin property measuring instrument

An electronic device includes an inertial force sensor, a memory unit, and a control unit connected to the inertial force sensor and the memory unit. The control unit includes a characteristic-waveform processor and an authenticator. The characteristic-waveform processor is operable to generate a characteristic waveform based on output waveforms output from the inertial force sensor in response to operations performed by a first user, and to record the characteristic waveform in the memory unit. The authenticator is operable to generate a reference waveform based on one or more output waveforms output from the inertial force sensor in response to respective ones of one or more operations performed by a second user, and to determine whether or not the first user and the second user are identical to each other by comparing the reference waveform with the characteristic waveform. This electronic device performs accurate authentication with a simple structure.

Electronic device including inertial force sensor capable of detecting multiple inertial forces

The present invention relates to the resistors used for detecting current in a current-carrying circuit as a voltage, and aims to provides a resistor which assures highly accurate measurement of resistance even if the measuring point is not precisely placed. To obtain the above purpose, the resistor of the present invention comprises a sheet metal resistor element ( ) and separate metal terminals ( ),( ) electrically connected to both ends of the sheet resistor element( ). These terminals ( ),( ) are made of metal having the same or greater electrical conductivity than that of the resistor element ( ). With the above configuration, resistance of the terminals can be made smaller than that of the resistor element. This enables to reduce the proportion of resistance of the terminals in the entire resistor, allowing to ignore its effect on fluctuation of resistance due to deviation in measuring points of a resistance measuring terminal.

Low-resistance resistor and its manufacturing method

Growing community of inventors

Hyogo, Japan

Koichi Ikemoto