Nippon Telegraph and Telephone Corporation

Mitsubishi Heavy Industries Limited

Ntt Corporation

Akio Tokura

Yuki Hashimoto

Kei Kuwabara

Takako Ishihara

Toshiki Wada

Osamu Tadanaga

Yoichiro Tsumura

Kenji Muta

Yuichi Higuchi

Hiroyoshi Togo

Shuuji Fujii

Hiroto Matsuoka

Tatsuyuki Nishimiya

Kenichi Matsunaga

Yutaka Miyamoto

Hidehiko Takara

Takeshi Umeki

Takayuki Ogasawara

Masaki Asobe

Hirokazu Takenouchi

Kouji Enbutsu

Isao Tomita

A wearable sensor device includes a temperature and humidity sensor that measures ambient environmental information around a living body, a snap button connected to a bioelectrode, a biological information measurement unit that measures biological information, an inertial sensor that measures inertial information, a calculation unit that calculates a biological feature amount based on the biological information and calculates an inertial feature amount based on the inertial information, and a wireless communication unit that transmits the biological information, the inertial information, the biological feature amount, the inertial feature amount, and the environmental information to the outside.

Wearable sensor device

A wearable environmental sensor device includes a temperature/humidity sensor disposed on a wall surface of a housing that is exposed to an environment and configured to measure ambient environmental information around a living body, and a protective structure formed around the temperature/humidity sensor. The temperature/humidity sensor is disposed, directly or via a support structure, on or over the wall surface of the housing, wherein the wall surface faces substantially downward from the living body when the wearable environmental sensor device is attached to the living body and the living body is in a standing posture. The protective structure has respective ventilation holes provided in two or more pairs of opposed surfaces thereof each facing in a direction other than a vertical direction of the living body when the wearable environmental sensor device is attached to the living body and the living body is in the standing posture.

Wearable environmental sensor device and monitoring system

A wearable sensor device includes a temperature and humidity sensor that measures ambient environmental information around a living body. The temperature and humidity sensor is provided on an outer wall surface of a housing or provided to be separated from the outer wall surface. The outer wall surface of the housing faces a left or right side or diagonally downward when the wearable sensor device is attached to the living body and the living body is in a standing posture.

Wearable sensor device and monitoring system

An embodiment optical blood pressure monitor includes a laser Doppler blood flowmeter, which measures the blood flow velocity in a peripheral blood vessel, a photoplethysmography monitor, which measures the pulse waveform in a peripheral blood vessel, a heart rate monitor, which measures data relating to the pulsation of a heart, a characteristic point extraction portion, which extracts a characteristic point relating to the pulsation from the data relating to the pulsation of the heart, a first calculation portion, which determines the pulse wave velocity from the pulse waveform, and a second calculation portion, which determines the blood pressure based on the pulse wave velocity and the blood flow velocity.

Sphygmomanometer using laser Doppler flowmeter, photoplethysmogram, and heart rate monitor

A fluid measurement device includes sensor elements that are arranged around a pipe in which a fluid containing a scatterer flows and include each of a light source, a light receiver, and a partition structure for shading between the light source and the light receiver, a signal processor that processes the signals obtained from the light that has been received and photoelectrically converted by the light receivers, and a calculator that calculates at least one of a flow velocity and a flow rate using the signals processed by the signal process unit. The light source and the light receiver in each of the sensor elements are arranged in proximity along the pipe axis direction of the pipe so as to have a reverse positional relationship to the light source and the light receiver in the adjacent sensor elements.

Fluid measurement apparatus

This NO analysis device is provided with: a light source () which radiates laser light onto an exhaust gas () containing NO, HO and CO; a light receiver () which receives the laser light that has been radiated onto the exhaust gas (); a light source control unit () of a control device (), which controls the wavelength of the laser light radiated by the light source () to between 3.84 &#x3bc;m and 4.00 &#x3bc;m; and a signal analyzing unit () of the control device (), which calculates the NO concentration by means of infrared spectroscopy, using the laser light received by the light receiver () and the laser light controlled by the light source control unit () of the control device ().

[object Object]

To provide an SOanalysis device and analysis method capable of accurately and rapidly measuring the concentration of SOin exhaust gas without pre-processing. The present invention is provided with a light source () for radiating laser light () to exhaust gas () including SO, CO, and HO, a photodetector () for receiving the laser light () radiated to the exhaust gas (), a light source control unit () of a control device () for controlling the wavelength of the laser light () radiated by the light source () so as to be 4.060 &#x3bc;m to 4.192 &#x3bc;m, and a concentration calculation unit () of the control device () for calculating the SOconcentration by infrared spectroscopy on the basis of the output from the photodetector () and a reference signal from the light source control unit ().

SO3 analysis method and analysis device

The phase sensitive amplifier according to the present invention is a phase sensitive amplifier that uses the optical mixing using a nonlinear optical effect to amplify the signal light. The phase sensitive amplifier according to the present invention includes: the first second-order nonlinear optical element; and the second second-order nonlinear optical element. The first second-order nonlinear optical element causes the fundamental wave light to generate second harmonic light used as pump light and separates only the second harmonic light. The second second-order nonlinear optical element includes a multiplexer to multiplex the signal light with the second harmonic light and spectrally separates only the amplified signal light. The multiplexed signal light and second harmonic light are used subjected to parametric amplification.

Optical amplifier

Growing community of inventors

Tokyo, Japan

Akio Tokura