Abstract: Provided is a blood pressure measuring apparatus, a wrist watch type terminal, and a method of measuring blood pressure. The blood pressure measuring apparatus includes a light source that emits light onto a living body, a light receiver that receives light from the living body, and a signal processing device that calculates the blood pressure based on a detected signal received from the light receiver, wherein the signal processing device includes a subtractor that obtains a subtraction value by subtracting a moving average value of the detected signal in a second duration which is shorter than a first duration from a moving average value of the detection signal in the first duration, an extractor that extracts a feature point of a pulse wave based on the subtraction value, and a converter that converts a feature amount obtained based on the feature point to a blood pressure value.

Abstract: A living body detection system includes a transmitting and receiving unit performing transmission and reception of detection waves at an inside of a movable body, the detection waves including directivity in at least one of the transmission and the reception of the detection waves, and a processing unit controlling the transmission of the detection waves and extracting living body information from a receiving signal based on the detection waves received by the transmitting and receiving unit to detect a living body at the inside of the movable body.

Abstract: An authentication terminal includes: a casing that is worn on a body of a target person; first and second electrodes that are provided in the casing and measure a measurement potential as biological information; a light emitting unit that is provided in the casing and emits measurement light for measuring a muscle potential to the body of the target person; a light receiving unit that receives the measurement light and outputs muscle potential information which corresponds to the muscle potential; and a terminal-side control unit that outputs authentication information which is generated based on the muscle potential that is indicated by the muscle potential information, and on a cardiac potential that is calculated from the measurement potential between the first electrode and the second electrode to another device.

Abstract: Provided is a blood pressure measuring apparatus, a wrist watch type terminal, and a method of measuring blood pressure. The blood pressure measuring apparatus includes a light source that emits light onto a living body, a light receiver that receives light from the living body, and a signal processing device that calculates the blood pressure based on a detected signal received from the light receiver, wherein the signal processing device includes a subtractor that obtains a subtraction value by subtracting a moving average value of the detected signal in a second duration which is shorter than a first duration from a moving average value of the detection signal in the first duration, an extractor that extracts a feature point of a pulse wave based on the subtraction value, and a converter that converts a feature amount obtained based on the feature point to a blood pressure value.

Abstract: A photoelectric sensor retainer and a photoelectric pulse wave measuring apparatus including the same are provided. The photoelectric sensor retainer includes a sensor mounting unit on which a photoelectric sensor having a light-receiving surface is attachable and detachable, the light-receiving surface facing a measuring direction. The photoelectric sensor retainer further includes a pressing unit configured to press an upper surface of the sensor mounting unit in the measuring direction to apply pressure to the sensor mounting unit, and a pedestal including a seating plate configured to support the pressing unit, the seating plate having a principal plane perpendicular to a pressing direction of the pressing unit.

Abstract: A photoelectric sensor retainer and a photoelectric pulse wave measuring apparatus including the same are provided. The photoelectric sensor retainer includes a sensor mounting unit on which a photoelectric sensor having a light-receiving surface is attachable and detachable, the light-receiving surface facing a measuring direction. The photoelectric sensor retainer further includes a pressing unit configured to press an upper surface of the sensor mounting unit in the measuring direction to apply pressure to the sensor mounting unit, and a pedestal including a seating plate configured to support the pressing unit, the seating plate having a principal plane perpendicular to a pressing direction of the pressing unit.

Abstract: A method and an apparatus for acquiring biological information, and a wrist watch-type terminal using the same, are provided. The apparatus includes a first detector configured to irradiate a living body with a first light of a first wavelength, and detect a second light that is reflected from the living body, and a second detector configured to irradiate the living body with a third light of a second wavelength, and detect a fourth light that is reflected from the living body. The apparatus further includes a processor configured to determine a pulse wave of the living body based on a subtraction value of subtracting a detection signal that is determined by irradiating the third light of the second wavelength from a detection signal that is determined by irradiating the first light of the first wavelength.

Abstract: Provided is a blood pressure measuring apparatus, a wrist watch type terminal, and a method of measuring blood pressure. The blood pressure measuring apparatus includes a light source that emits light onto a living body, a light receiver that receives light from the living body, and a signal processing device that calculates the blood pressure based on a detected signal received from the light receiver, wherein the signal processing device includes a subtractor that obtains a subtraction value by subtracting a moving average value of the detected signal in a second duration which is shorter than a first duration from a moving average value of the detection signal in the first duration, an extractor that extracts a feature point of a pulse wave based on the subtraction value, and a converter that converts a feature amount obtained based on the feature point to a blood pressure value.

Abstract: First and second semiconductor switches which are activated alternately are provided between ends of a primary winding and a common potential point, wherein a DC power supply voltage is supplied to a center tap. An electric current flowing into a load is fed back to thereby subject the semiconductor switches to PWM control. Series circuits consisting of capacitors and semiconductor switches are connected between the center tap of the primary winding and the ends of the same. The semiconductor switches are activated in synchronism with the first and second semiconductor switches, thereby preventing occurrence of an anomalous high voltage, which would otherwise be caused at the time of switching operation.

Abstract: First and second semiconductor switches which are activated alternately are provided between ends of a primary winding and a common potential point, wherein a DC power supply voltage is supplied to a center tap. An electric current flowing into a load is fed back to thereby subject the semiconductor switches to PWM control. Series circuits consisting of capacitors and semiconductor switches are connected between the center tap of the primary winding and the ends of the same. The semiconductor switches are activated in synchronism with the first and second semiconductor switches, thereby preventing occurrence of an anomalous high voltage, which would otherwise be caused at the time of switching operation.

Abstract: First and second semiconductor switches which are activated alternately are provided between ends of a primary winding and a common potential point, wherein a DC power supply voltage is supplied to a center tap. An electric current flowing into a load is fed back to thereby subject the semiconductor switches to PWM control. Series circuits consisting of capacitors and semiconductor switches are connected between the center tap of the primary winding and the ends of the same. The semiconductor switches are activated in synchronism with the first and second semiconductor switches, thereby preventing occurrence of an anomalous high voltage, which would otherwise be caused at the time of switching operation.

Abstract: First and second semiconductor switches which are activated alternately are provided between ends of a primary winding and a common potential point, wherein a DC power supply voltage is supplied to a center tap. An electric current flowing into a load is fed back to thereby subject the semiconductor switches to PWM control. Series circuits consisting of capacitors and semiconductor switches are connected between the center tap of the primary winding and the ends of the same. The semiconductor switches are activated in synchronism with the first and second semiconductor switches, thereby preventing occurrence of an anomalous high voltage, which would otherwise be caused at the time of switching operation.

Abstract: First and second semiconductor switches which are activated alternately are provided between ends of a primary winding and a common potential point, wherein a DC power supply voltage is supplied to a center tap. An electric current flowing into a load is fed back to thereby subject the semiconductor switches to PWM control. Series circuits consisting of capacitors and semiconductor switches are connected between the center tap of the primary winding and the ends of the same. The semiconductor switches are activated in synchronism with the first and second semiconductor switches, thereby preventing occurrence of an anomalous high voltage, which would otherwise be caused at the time of switching operation.

Abstract: First and second semiconductor switches which are activated alternately are provided between ends of a primary winding and a common potential point, wherein a DC power supply voltage is supplied to a center tap. An electric current flowing into a load is fed back to thereby subject the semiconductor switches to PWM control. Series circuits consisting of capacitors and semiconductor switches are connected between the center tap of the primary winding and the ends of the same. The semiconductor switches are activated in synchronism with the first and second semiconductor switches, thereby preventing occurrence of an anomalous high voltage, which would otherwise be caused at the time of switching operation.

Abstract: First and second semiconductor switches which are activated alternately are provided between ends of a primary winding and a common potential point, wherein a DC power supply voltage is supplied to a center tap. An electric current flowing into a load is fed back to thereby subject the semiconductor switches to PWM control. Series circuits consisting of capacitors and semiconductor switches are connected between the center tap of the primary winding and the ends of the same. The semiconductor switches are activated in synchronism with the first and second semiconductor switches, thereby preventing occurrence of an anomalous high voltage, which would otherwise be caused at the time of switching operation.

Abstract: First and second semiconductor switches which are activated alternately are provided between ends of a primary winding and a common potential point, wherein a DC power supply voltage is supplied to a center tap. An electric current flowing into a load is fed back to thereby subject the semiconductor switches to PWM control. Series circuits consisting of capacitors and semiconductor switches are connected between the center tap of the primary winding and the ends of the same. The semiconductor switches are activated in synchronism with the first and second semiconductor switches, thereby preventing occurrence of an anomalous high voltage, which would otherwise be caused at the time of switching operation.