Nec Corporation

Kagawa University

Sony Group Corporation

Ersin Altintas

Masahiro Kubo

Katsumi Abe

Yuji Ohno

Takeshi Akagawa

Tetsuri Ariyama

Kimiyasu Takoh

Hiroshi Imai

Ichiro Ishimaru

Osamu Tochikubo

A timepiece includes a pointer; an angular velocity sensor that is provided on the pointer and detects an angular velocity; and an azimuth detection processing unit that performs an azimuth detection process from a detection result of the angular velocity sensor.

Timepiece and azimuth detection method

A living body determination device includes: a light irradiation device that irradiates a measuring object with a first light including a plurality of spectrums; a spectroscopic device that disperses a light at intensity depending on a wavelength and outputs the light; an image acquisition device that receives the light output by the spectroscopic device and outputs image information representing brightness depending on the intensity of the light; and a control unit. The control unit, for each spectrum of the first light, acquires image information with respect to the measuring object from the image acquisition device, based on the image information, selects one or more areas, for each of the areas, acquires spectroscopic information, and based on whether the spectroscopic information satisfies a predetermined condition, determines whether the measuring object is a living body.

Living body determination device, living body determination method, and living body determination program

The purpose of the present invention is to provide a sphygmomanometer that has a high level of measurement accuracy and places a low burden upon a subject whose systolic pressure is being measured. To this end, the sphygmomanometer according to the present invention is characterized by comprising: a cuff pressure and pulse wave detecting unit that detects cuff pressure and pulse waves; and a blood pressure calculating unit that divides pulse waves detected by the cuff pressure and pulse wave detecting unit into a plurality of sections within a specific period, and calculates an estimated value for systolic pressure on the basis of fluctuations in the symmetry of the pulse wave waveform in the plurality of sections, said fluctuations occurring along with variations in the cuff pressure detected by the cuff pressure and pulse wave detecting unit.

Sphygmomanometer, blood pressure measurement method, and blood pressure measurement program

Optical measuring apparatus includes: a light source irradiating an object to be measured; a splitter splitting transmitted light or reflected light from the object to be measured; a phase changer changing a phase of a first light which is one of the lights split; a phase fixer maintaining a phase of a second light which is the other light split; a multiplexer multiplexing lights output from the phase changer and the phase fixer; a detector detecting the light (interference image) output from the multiplexer; and a controller that extracts a reference point from the interference image, when a displacement of the reference point is detected, corrects a luminance value for each pixel of the interference images in accordance with a displacement of the object to be measured indicated by a displacement of the reference point, constructs an interferogram based on the luminance value for each pixel of the interference images after the correction.

Optical measuring apparatus and optical measuring method

An object of the present invention is to provide an electrocardiogram measurement apparatus capable of significantly reducing the number of electrodes and measuring even a faint signal. The present invention provides an electrocardiogram measurement apparatus including a first electrode and a second electrode to be brought into contact with a body surface near an artery, an electrocardiogram measurement means for measuring a signal obtained from the first electrode and the second electrode, an artery position measurement means for identifying a position at which a measured value of a measured signal is largest as a position of an artery; and a notification means for notifying a user of information indicating the position of an artery.

Electrocardiogram measurement apparatus and electrocardiogram measurement method

Provided is an excrement analysis device capable of analyzing urine and feces simultaneously without increasing a burden of maintenance. The excrement analysis deviceof the present invention includes: a light sourcethat emits an inspection light toward an inspection area in a toilet bowl; spectroscopic information acquisition meansthat receives an inspection light emitted toward the inspection area and acquires spectroscopic information from the received inspection light; and analysis meansthat extracts a first space containing the largest amount of urine components and a second space containing the largest amount of fecal components from the acquired spectroscopic information, and outputs a result of analysis of urine and feces on the basis of spectroscopic information regarding the first space and the second space.

Excrement analysis device, toilet provided with said analysis device, and method for analyzing excrement

A light measurement device that maintains high measurement precision. The light measurement device includes: light source that irradiates light upon measurement object; branch part that splits transmitted light or reflected light from measurement object; phase-changing unit that changes the phase of one beam of the branched light beams; phase-fixing unit that maintains the phase of the other beam of the branched light beams; adjustment mechanism, which is provided in phase-changing unit or phase-fixing unit, for adjusting the propagation direction of light; multiplexer that causes the light emitted by each of phase-changing unit and phase-fixing unit to interfere with each other; detection unit that detects light that is interfered with by multiplexer; and control unit that controls the adjustment mechanism on the basis of the luminance values of an interference image that is detected by detection unit and adjusts the propagation direction of light in phase-changing unit or phase-fixing unit.

Light measurement device and optical axis adjustment method

A living body is accurately determined while minimizing increases in the size of a device and increases in the number of components. A living body determination device includes a spectroscopic devicethat disperses light entering from a pedestal side and outputs the result; a light emission devicethat emits first light toward the pedestal from a position facing the spectroscopic devicewith the pedestal therebetween; a light emission devicethat emits second light toward the pedestal from the spectroscopic deviceside; an image acquisition devicethat outputs image information indicating a brightness corresponding to the intensity of the light output by the spectroscopic device; and a calculation devicethat acquires first image information regarding each of the spectra of the first light from the image acquisition device, acquires first spectroscopic information on the basis of each of the pieces of first image information, acquires second image information regarding each of the spectra of the second light from the image acquisition device, acquires second spectroscopic information on the basis of each of the pieces of second image information, and determines whether or not a measurement targetis a living body, based on the first and second spectroscopic information.

Living body determination device, living body determination method, and program

[Object] To obtain interference light having a stronger light intensity, and to more accurately measure a refractive index of a measured object, with a simplified configuration. [Solution Means] A light measurement deviceincludes a phase adjustment unitand a detector. The phase adjustment unitoutputs reference light E(R) based on object light Ebeing light to be obtained by transmission or reflection of light E from a light source with respect to a measured object, and signal light E(S) whose phase is adjusted to be different from a phase of signal light. The detectorderives a transmission or reflection light intensity distribution or a refractive index of the measured object, based on interference light Ebetween signal light E(S) and reference light E(R) to be output by the phase adjustment unit. An optical axis of light E from a light source is linearly disposed. The phase adjustment unitand the detectorare disposed on the optical axis of light E from a light source.

Light measurement device

Disclosed are a blood pressure estimation device and the like which make it possible to estimate blood pressure with a high degree of accuracy. A blood pressure estimation device () has: a pulse wave calculation unit () for, on the basis of a pressure signal in a specific period and a pulse wave signal () measured on the basis of the pressure of the pressure signal in the specific period, calculating a plurality of times at which a pulse signal satisfies prescribed conditions, a period representing the difference between the times, and a pressure value of the pressure signal during the period, and also calculating pulse wave information associating the period and the pressure value; and a blood pressure estimation unit () for estimating the blood pressure of the pulse wave signal () on the basis of the pulse wave information.

Blood pressure measurement device, blood pressure measurement method, and non-transitory recording medium

A biometric authentication apparatusaccording to the present invention can be installed in facilities such as airports in order to improve the reliability of biometric authentication to ensure a high level of security. The biometric authentication apparatusincludes a illumination unitwhich irradiates a human finger with light; an image acquisition unitwhich acquires a plurality of images indicating changes in luminance by receiving light scattered at the human finger that is a part of the light with which the human finger is irradiated by the illumination unitand converting the received light to luminance information according to the intensity of the light; an image-to-biometric-information conversion unitwhich converts the plurality of images acquired by the image acquisition unitto biometric information indicating a pulse wave in the human finger; and a biometric authentication unitwhich performs biometric authentication when a pulse wave signal which is the biometric information resulting from the conversion by the image-to-biometric-information conversion unitis greater than a predetermined threshold.

Biometric authentication apparatus and biometric authentication method

Disclosed are a blood pressure device, etc., that is capable of highly accurate of blood pressure. The blood pressure device () has a blood pressure unit () that: finds a specific blood pressure related to pulse wave information (), by browsing blood pressure information () associating the pulse wave information and blood pressure related to pulse wave signals caused by blood pressure during a specific period and measured, the pulse wave information associating blood pressure during the specific period and the pulse wave signals; and estimates the blood pressure relating to the pulse wave information () on the basis of the found specific blood pressure.

Provided are a blood pressure estimation device, and the like, the device being capable of accurately estimating blood pressure. The blood pressure estimation device includes a blood pressure estimation unit which estimates a blood pressure on the basis of a pressure in a specific time period and differences between a plurality of pulse wave signals measured in the specific time period due to the pressure.

Growing community of inventors

Tokyo, Japan

Ersin Altintas