Nippon Telegraph and Telephone Corporation

Toray Industries, Inc.

Ntt Electronics Corporation

Ryusuke Kawano

Kazuhiko Takagahara

Hiroshi Koizumi

Nobuaki Matsuura

Kei Kuwabara

Yasuhiro Sato

Michiko Seyama

Takako Ishihara

Masanobu Sato

Mitsuru Shinagawa

Ryoichi Kasahara

Shingo Tsukada

Takayuki Ogasawara

Nahoko Kasai

Kazuyoshi Ono

Emiko Ishikawa

Keiji Takeda

Koji Sumitomo

Noriko Nagai

Katsuyuki Ochiai

Atsushi Horiuchi

Takashi Teshigawara

Yuichi Kado

Takuji Harada

Hideyuki Okamoto

Ryoichi Matsumoto

Naoki Oda

In a biological signal measurement system of this invention, biological digital data is generated from a biological signal measured by a biological signal measurement apparatus, and first feature amount data extracted from the biological digital data and downsized biological digital data are transmitted to a portable terminal. In a biological information measurement apparatus of this invention, biological feature amount data is extracted from measured biological waveform data, and at least one of the biological waveform data and the biological feature amount data is transmitted to an external device. It is possible to provide a biological signal measurement system capable of continuously measuring a biological signal for a long time without disturbing daily life and provide a biological information measurement apparatus capable of implementing downsizing and long life of a battery.

Biological signal measurement system, biological information measurement apparatus, and biological information extraction algorithm changing method

A bioelectrode includes a fitting member () formed by an electrically insulating member fixed on a surface of a garment () that comes in contact with a living body (), an electrode part () formed by a conductive member fixed on a surface of the fitting member () that comes in contact with the living body (), a connector () fixed to the fitting member () and configured to connect a bioelectric signal measurement device, a wiring line () fixed to the fitting member () and configured to electrically connect the connector () and the electrode part (), and an electrically-insulating insulating member () configured to cover a portion within the surface of the wiring line () that comes in contact with the living body ().

Bioelectrode and garment

A heartbeat detection device includes a peak search unit () for searching for one of a peak at which a value M obtained from a sampling data sequence of an electrocardiographic waveform of a living body changes from an increase to a decrease and a peak at which the value M changes from a decrease to an increase, and a heartbeat time determination unit () for checking the value M in a predetermined time domain before a time of the peak and the value M in a predetermined time domain after the time of the peak, and setting the time of the peak as a heartbeat time if differences between the value M at the time of the peak and the values M in the predetermined time domains are not smaller than a predetermined amount.

Heartbeat detection method and heartbeat detection device

A heartbeat detection device includes a difference value calculation unit () for calculating, from a sampling data sequence of an electrocardiographic waveform of a living body, one of an amount of change and a degree of change of sampling data for each sampling time, a multiplication unit () for calculating, for each sampling time, a product by multiplying one of an amount of change and a degree of change of the sampling data at a time K by one of the sampling data at the time K and sampling data at a time before the time K by a predetermined time t, a peak detection unit () for detecting a peak of the product, and a heartbeat time determination unit () for setting time of the peak of the product as a heartbeat time.

A signal electrode (A) and a ground electrode (B) are disposed respectively on surfaces of a case (). In this way, the signal electrode (A) and the ground electrode (B) do not come into contact with any electric component, such as a transmission circuit (), disposed inside the case (), and thus a reduction in an electric field (Ec) induced in an electric-field transmission medium can be prevented. In addition, a certain distance between the signal electrode (A) and the ground electrode (B) is kept, and thus a reduction in the electric field (Ec) induced in the electric-field transmission medium can be prevented. Furthermore, the contactability between the signal electrode (A) and the electric-field transmission medium is improved, and thus the electric field (Ec) induced in the electric-field transmission medium can be increased.

Electric-field communication device

Growing community of inventors

Tokyo, Japan

Ryusuke Kawano