JP2022029919A5 - - Google Patents

Description

The biometric information acquisition device according to the present invention is a biometric information acquisition device having a small sensor head, and the small sensor head is
A mounting part that can be attached to the subject's body, a body conduction sound sensor that detects body conduction sound and acquires an acoustic signal, and a body conduction sound vibration signal measurement that measures the acoustic signal acquired by the body conduction sound sensor. Means and
It is characterized by comprising a biological information calculation means for calculating biological information from the acoustic signal.

The biological information is not particularly limited, and examples thereof include a stress index, a degree of fatigue, a degree of intestinal peristalsis, a blood pressure, and the like, and a stress index is preferable.

The autonomic nervous system is a system that controls blood circulation, respiration, body temperature regulation, etc. without intervention of consciousness, and includes a sympathetic nervous system and a parasympathetic nervous system. The sympathetic nervous system works to increase the activity level and motor ability of the body, and the parasympathetic nervous system works to calm the mind and body, suppress energy consumption, and store energy. Heart rate variability affects both sympathetic and parasympathetic nerves. That is, the stress index can be considered by the following formula.

The calculated biometric information is transmitted to the connected external device. As shown in FIG. 4, the external device has a power supply unit 810, a display unit 820, and a notification unit 830. The transmitted biometric information is displayed on the display unit 820, and is notified to the measurer by the notification unit 830.

Claims (9)

A biometric information acquisition device with a small sensor head.
The small sensor head is
A mounting part that can be attached to the subject's body,
A body-conducted sound sensor that detects body-conducted sound and acquires an acoustic signal,
A body-conducted vibration signal measuring means for measuring an acoustic signal acquired by the body-conducted sound sensor, and a body-conducted vibration signal measuring means.
A biological information acquisition device comprising: a biological information calculation means for calculating biological information from the acoustic signal. The biometric information acquisition device according to claim 1, wherein the body lead sound sensor includes an acceleration sensor that detects the acceleration of the body movement of the subject and acquires an acceleration signal. The biological information acquisition device according to claim 1, wherein the body sound guiding sensor includes an angular velocity sensor that detects an angular velocity of a subject's body movement and acquires an angular velocity signal. The body conduction sound sensor has an acceleration sensor that detects the acceleration of the body movement of the subject and acquires an acceleration signal, and an angular velocity sensor that detects the angular velocity of the body movement of the subject and acquires an angular velocity signal. The biometric information acquisition device according to claim 1. The body conduction sound sensor is a 3-axis acceleration sensor that detects the acceleration of the subject's body movement and acquires an acceleration signal, and a 3-axis angular velocity sensor that detects the angular velocity of the subject's body movement and acquires an angular velocity signal. The biometric information acquisition device according to claim 4, wherein the device has. The biometric information acquisition device according to any one of claims 1 to 5, wherein the body sound conduction sensor is a MEMS sensor. The body-guided vibration signal measuring means has a body having a vibration heart rate measuring unit for measuring an acoustic heart rate based on an acoustic signal acquired by the body-guided sound sensor and a vibration breathing rate measuring unit for measuring an acoustic breathing rate. The biometric information acquisition device according to any one of claims 1 to 6, further comprising a sound guide signal processing means. The body-conducted vibration signal measuring means has an acoustic signal conversion unit that Fourier transforms the acoustic signal acquired by the body-conducted sound sensor.
The vibration heart rate measuring unit has a low frequency removing unit that removes low frequency components from the acoustic conversion signal obtained by the acoustic signal conversion unit, and an acoustic sound based on the low frequency removing signal obtained by the low frequency removing unit. It has an acoustic heart rate calculation unit that calculates the heart rate, and has an acoustic heart rate calculation unit.
The vibration respiration rate measuring unit calculates an acoustic respiration rate based on a high frequency removing unit that removes a high frequency component from an acoustic conversion signal obtained by the acoustic signal conversion unit and a high frequency removing signal obtained by the high frequency removing unit. The biometric information acquisition device according to claim 7, further comprising an acoustic respiration rate calculation unit. The biometric information calculation means calculates biometric information using the respiratory variability / heart rate variability , which is the ratio of the respiratory variability measured by the vibrating respiratory rate measuring unit and the blood pressure variability measured by the vibrating heart rate measuring unit, as a stress index. The biometric information acquisition device according to claim 7 or 8, wherein the biometric information acquisition device is characterized by the above.