Abstract: An optical transmission system including an optical transmission device and an optical reception device that receives, via an optical transmission line, a signal transmitted from the optical transmission device, the optical transmission system including a transmission-mode selection unit that selects transmission mode information in descending order of priority out of transmission mode information, which is combinations of a plurality of parameters concerning transmission performance, the transmission mode information being a plurality of kinds of the transmission mode information common to the transmission performance of the optical transmission device and the optical reception device, a signal transmission unit that transmits, to the optical reception device, a signal modulated based on the selected transmission mode information, and a signal reception unit that receives the signal and modulates the received signal based on the transmission mode information selected by the transmission-mode selection unit.

Abstract: A wearable device includes a sensor device and a clothes to which the sensor device is attached. The clothes includes a clothes body and an insertion and extraction portion that has an opening formed in the clothes body and enables the sensor device to be inserted into or extracted from the clothes body. The sensor device includes a humidity sensor configured to measure humidity in the clothes body and a housing having a first region exposed to an inside of the clothes body and a second region exposed to an outside of the clothes body, while the sensor device is inserted from the insertion and extraction portion into the clothes body. The humidity sensor is accommodated in the first region of the housing.

Abstract: A measurement system includes a measurement unit configured to perform measurement a plurality of times on the basis of a first clock signal having a first clock period to obtain a plurality of measurement results, a time stamp provision unit configured to provide a time stamp indicating a measurement time to each measurement result obtained in the second period among the plurality of measurement results obtained using the measurement unit the basis of a second clock signal having a second clock period longer than the first clock period and having better period accuracy than the first clock signal, and a measurement time correction unit configured to correct a measurement time of a measurement result in accordance with a period specified using two time stamps and the number of measurement results obtained during the period.

Abstract: An RRI measurement device includes: an R wave detection unit configured to detect a peak point of an R wave from a sampling data sequence of an electrocardiogram signal of a subject; an R wave detection unit configured to estimate a waveform near the R wave of the electrocardiogram signal on the basis of the peak point of the R wave detected by the R wave detection unit and sampling data of the electrocardiogram signal before and after the peak point and to detect the peak point of the R wave again on the basis of the estimated waveform; and an RRI calculation unit configured to calculate an RRI on the basis of time-series data of the peak point of the R wave detected by the R wave detection unit.

Abstract: An RRI measurement device includes: a feature point detection unit configured to detect a feature point derived from an RS wave from a sampling data sequence of an electrocardiogram signal of a subject; a time estimation unit configured to search for two sampling points where a product of adjacent pieces of sampling data is zero or less in sampling data near the feature point and to estimate a time at which the electrocardiogram signal becomes zero using the two sampling points; and an RRI calculation unit configured to calculate an RRI on the basis of time-series data of the time estimated by the time estimation unit.

Abstract: A garment with electrodes includes a different electrode disposed in the vicinity of a left shoulder of a garment on a lining of a back body of the garment so as to be in contact with an inclined surface of a raised portion of a left shoulder blade of a back of a subject to be measured; an indifferent electrode disposed in the vicinity of a right shoulder of the garment so as to be in contact with an inclined surface of a raised portion of a right shoulder blade of the back of the subject to be measured; a wiring part connected to each of the different electrode and the indifferent electrode; and a controller connected to the wiring part.

Abstract: According to the present disclosure, a heart rate detection method includes measuring an ECG waveform, calculating a heart rate from the ECG waveform, calculating a difference value of a potential of the ECG waveform between sampling time points, calculating an integrated value obtained by integrating the difference value between a measurement time point and any time point before measurement, and determining whether the heart rate at the measurement time point is to be displayed, by comparing the integrated value to a reference value.

Abstract: According to the present disclosure, a heart rate detection method includes measuring an ECG waveform, calculating an R-R interval from the ECG waveform, calculating an instantaneous heart rate from the R-R interval, calculating an index based on the instantaneous heart rate, and determining whether the heart rate obtained from the R-R interval is to be displayed, by comparing the index to a reference value.

Abstract: A measurement control apparatus includes a sensor data acquisition unit configured to acquire biological information of a user measured by a sensor, an extraction unit configured to extract a feature quantity with periodicity from the biological information acquired by the sensor data acquisition unit, an interval acquisition unit configured to acquire a period of the extracted feature quantity, a determination unit configured to determine whether or not the feature quantity will have appeared by a set end time on the basis of the acquired period of the feature quantity, and a termination processing unit configured to terminate an operation of the sensor data acquisition unit when the determination unit determines that the feature quantity will not have appeared by the set end time.

Abstract: A wearable device includes a base material including a first surface disposed in contact with skin of a living body, a first recessed portion formed in the first surface of the base material, a flow path being formed in the base material and including a first end that opens into the first recessed portion and a second end that opens into a second surface opposite to the first surface of the base material, a water absorbing structure that is provided on the second surface and absorbs sweat transported from the first recessed portion through the flow path and secreted from the skin, and a sensor that measures a physical amount related to the sweat flowing through the flow path and outputs a measurement signal.

Abstract: A wearable device attached to a living body includes a substrate that forms a first flow path, a second flow path, and a third flow path, a light source that is disposed on the substrate and emits light toward the second flow path, and a light receiving element that is disposed on the substrate to face the light source, receives the light emitted from the light source and transmitted through the second flow path, converts the received light into an electrical signal, and outputs the electrical signal.

Abstract: A wearable device includes a base material including a first surface, a first flow path being formed in the base material, including one end that opens into the first surface, and extending along a direction toward a second surface opposite to the first surface of the base material, a second flow path being formed in the base material and including one end connected to another end of the first flow path and another end that opens into the second surface, a water absorbing structure that is provided on the second surface and absorbs sweat transported from the first flow path through the second flow path and secreted from skin of the living body, and a sensor that is disposed on the base material, detects an electrical signal deriving from a predetermined component included in the sweat flowing from the first flow path to the second flow path.

Abstract: An embodiment is a wearable device attached to a living body, including a base material including a first surface and a second surface opposite to the first surface, a first flow path in the base material having a first end and a second end and extending along a direction toward the second surface, the first end open to the first surface and, a second flow path in the base material having a third end and a fourth end, the third end connected to the second end, the fourth end open to the second surface, a water absorbing structure on the second surface and configured to absorb sweat transported from the first flow path through the second flow path, a light source configured to emit light toward the second flow path, and a light receiving element configured to receive the emitted light and convert the received light into an electrical signal.

Abstract: A wearable device attached to a living body includes a substrate that forms a first flow path, a second flow path, and a third flow path, an electrode exposed to the first flow path, an electrode spaced apart from the electrode and exposed to the second flow path, and a sensor that detects, by using the electrodes, an electrical signal deriving from a predetermined component included in sweat that flows from the first flow path to the second flow path and is secreted from skin of the living body and outputs the electrical signal.

Abstract: A wearable environmental sensor includes an environmental sensor arranged on a wall surface of a housing including a sealed section, the wall being in contact with an environment, and a protective structure formed around the environmental sensor, wherein the protective structure includes a plurality of ventilating holes, a sensor surface of the environmental sensor is arranged to face an opening of at least one of the ventilating holes, and an attaching part for attaching the environmental sensor to the wall surface comes into contact only with an edge of a sensor substrate of the environmental sensor and with a portion of a back face of the sensor substrate.

Abstract: A concentration device includes a substrate that has a flow path formed therein extending from an inlet-side opening into which a liquid to be concentrated is introduced to an outlet-side opening, and a desiccant that is disposed in containing spaces in the substrate to face a liquid in the flow path across air layers.

Abstract: A particle arrangement transportation device includes: a base material in which is formed a flow channel from an inlet port-side opening through which a solution containing particles to be an object of arrangement and transportation is introduced to an outlet port-side opening; an electrode which is formed along the flow channel on a wall surface of the base material being exposed in the flow channel; electrodes which are formed along the flow channel in the base material on both sides of the flow channel; and a power supply which applies an AC voltage between the electrodes.

Abstract: A heartbeat detection device includes: a sensor data acquisition unit that acquires sensor data indicating an electrocardiographic waveform of a living body and outputs a sampling data sequence D(i) based on the sensor data; a first calculation unit that calculates a temporal difference value DY(i) of sampling data D(i) from the output sampling data sequence D(i) for each sampling time; a determination unit that determines a heartbeat time on the basis of a time at which a change in the calculated temporal difference value DY(i) exceeds a set threshold; a correction unit that corrects the heartbeat time by using a reference time; and a heart rate calculation unit that calculates a heart rate of the living body from the corrected heartbeat time.

Abstract: A heart rate detection device includes a sensor data acquisition device that acquires sensor data indicating an electrocardiogram of a living body to output a sequence of sampling data based on the sensor data, a first calculator that calculates, every sampling time, a time difference value of sampling data, a decision device that decides a heart rate time based on a change in the time difference value calculated by the first calculator exceeds a threshold that is set, a corrector that corrects the heart rate time based on when a cardiac potential becomes zero on a straight line passing through two points of sampling data at the heart rate time decided by the decision device and sampling data immediately before the sampling data at the heart rate time, and a second calculator that calculates a heart rate of the living body from the heart rate time that is corrected.

Abstract: A wearable environmental sensor is configured to measure environmental information regarding a place where the device is worn, and includes a black-bulb temperature sensor including a black bulb and a temperature sensor for measuring internal temperature in the black bulb, the black-bulb temperature sensor being in a housing, wherein the black bulb includes an insertion hole into which the temperature sensor is inserted, the black bulb includes a weld portion welded to the housing, in an outer-circumferential portion of the bottom surface, the black bulb includes a guide portion in an outer-circumferential portion around the insertion hole, the housing includes an insertion opening into which the guide portion of the black bulb is inserted, the housing includes a protruding portion at an outer-circumferential portion around the insertion opening, and the guide portion is supported by the protruding portion.