Abstract:
The present disclosure provides a transceiving device. The transceiving device includes: a modulated signal generating unit, configured to generate a modulated signal; a transmitting unit, configured to be driven by the modulated signal; a receiving unit, configured to receive a transmission signal transmitted from the transmitting unit; and a crystal filter, configured to receive a receiving signal output from the receiving unit and including a crystal resonator. The modulated signal is a sweep signal that changes between a predetermined first frequency higher than a resonant frequency of the crystal filter and a predetermined second frequency lower than the resonant frequency.
Abstract:
A pulse wave sensor includes: a light emitting unit configured to emit light onto a living body; a light receiving unit configured to receive light transmitted through or reflected from the living body based on the light from the light emitting unit; a pulse wave detecting unit configured to detect a pulse wave of the living body based on a result of light reception by the light receiving unit when the light is emitted from the light emitting unit with a normal light emission intensity; and a light emission intensity adjusting unit configured to cause the light emitting unit to emit light with a predetermined test light emission intensity in a test period prior to the detection of the pulse wave, and set the normal light emission intensity using detection light reception intensity in the light receiving unit by the light emission and a predetermined reference light reception intensity.
Abstract:
A pulse wave sensor includes a light sensor unit arranged to irradiate a living body with light from a light emitting unit and to detect reflected light or transmitted light from the living body by a light receiving unit, so as to generate a current signal corresponding to received light intensity, a pulse drive unit arranged to turn on and off the light emitting unit at a predetermined frame frequency and duty, a transimpedance amplifier arranged to convert the current signal into a voltage signal, and a mounting determination unit arranged to perform mounting determination by comparing an OFF voltage signal obtained by the transimpedance amplifier during an OFF period of the light emitting unit with a predetermined first threshold voltage.
Abstract:
A pulse wave sensor includes: a light emitting unit configured to emit light onto a living body; a light receiving unit configured to receive light transmitted through or reflected from the living body based on the light from the light emitting unit; a pulse wave detecting unit configured to detect a pulse wave of the living body based on a result of light reception by the light receiving unit when the light is emitted from the light emitting unit with a normal light emission intensity; and a light emission intensity adjusting unit configured to cause the light emitting unit to emit light with a predetermined test light emission intensity in a test period prior to the detection of the pulse wave, and set the normal light emission intensity using detection light reception intensity in the light receiving unit by the light emission and a predetermined reference light reception intensity.
Abstract:
[Problem] To provide a pulse sensor capable of accurately measuring the pulse of a subject. [Solution] A pulse sensor (600) has: a housing (610) mounted to an external ear; an optical sensor unit (620) which is disposed upon the housing (610) and acquires pulse data by emitting light from a light-emitting portion onto the external ear and detecting, at a light-receiving unit, the intensity of the light that is transmitted through a living body and returns; and a buffer member (630) which is disposed between the housing (610) and the optical sensor unit (620).
Abstract:
[Problem] To provide a pulse sensor capable of accurately measuring the pulse of a subject. [Solution] A pulse sensor (600) has: a housing (610) mounted to an external ear; an optical sensor unit (620) which is disposed upon the housing (610) and acquires pulse data by emitting light from a light-emitting portion onto the external ear and detecting, at a light-receiving unit, the intensity of the light that is transmitted through a living body and returns; and a buffer member (630) which is disposed between the housing (610) and the optical sensor unit (620).
Abstract:
An earthquake sensing module includes an acceleration sensor configured to detect accelerations on a plurality of detection axes, a module control unit configured to control the acceleration sensor, and a module storage unit configured to store state information of the acceleration sensor.
Abstract:
A pulse wave sensor includes: an optical sensor unit configured to irradiate a living body with light emitted from a light emitting unit and detect light reflected from or transmitted through the living body with a light receiving unit to generate a current signal in accordance with a light reception intensity; a pulse driving unit configured to turn on or turn off the light emitting unit at a predetermined frame frequency and a predetermined duty rate; a current-voltage conversion circuit configured to convert the current signal into a voltage signal; and a detection circuit configured to extract an upper envelope and a lower envelope of the voltage signal and obtain a difference therebetween to generate a detection signal.
Abstract:
A wireless plethysmogram sensor unit is capable of obtaining a plethysmogram from a living tissue of a measuring object and of transmitting the plethysmogram to a processing unit outside the wireless plethysmogram sensor unit. The sensor unit includes a light source to emit measuring light into the living tissue and a light receiving element to receive light emerging from the tissue, which is accompanied by pulsation caused by absorption by arteries in the tissue. A memory stores a plethysmogram obtained in accordance with the light received by the light receiving element. A short range wireless communicator transmits the plethysmogram to the processing unit. A power source provides power to other elements in the sensor unit, and a controller controls the elements of the sensor unit.