The purpose of the present invention is to measure the blood pressure of a living body in a non-contact and non-invasive manner. An experimental device (1) irradiates a subject (7) with microwaves from a transmission antenna (23) and a reception antenna (25) receives the reflected waves. Since the phase of the reflected wave varies with micro-movements of the body surface caused by the heartbeat, a pulse wave can be detected from the difference in phase between the emitted wave and the reflected wave. Additionally, the experimental device (1) continuously detects the blood pressure of the subject (7) from a blood pressure sensor (5) mounted on the subject (7) while continuously detecting the pulse wave. A frequency spectrum of the pulse wave of the subject (7) is generated by Fourier transformation of the pulse wave. A comparison of the spectrum and the blood pressure of the subject (7) detected by the blood pressure sensor (5) reveals a statistically significant positive correlation of the systolic blood pressure with an eighth harmonic wave from among frequency components of the pulse wave. On the basis of the experimental result, a device can be achieved which detects a pulse wave of a subject in a non-contact and non-invasive manner using microwaves, and which measures the systolic blood pressure using the correlation.
本发明的目的在于以非接触及非侵害的方式测定生物体的血压。在实验装置(1)中,从发送天线(23)向受检者(7)照射微波,利用接收天线(25)接收其反射波。反射波的相位由于基于脉搏的身体表面的微动而变化,因此能够根据发送波与反射波的相位差来检测脉搏波。而且,实验装置(1)一边连续地检测脉搏波,还一边由穿戴于受检者(7)的血压传感器(5)连续地检测受检者(7)的血压。对受检者(7)的脉搏波进行傅立叶变换而生成脉搏波的频谱,并将其与由血压传感器(5)检测出的受检者(7)的血压进行比较之后,发现了脉搏波的频率成分中的8次谐波与收缩期血压在统计上表示有意义的正相关。根据以上的实验结果,能够采实现使用微波以非接触及非侵害的方式检测对象者的脉搏波,并对其应用上述的相关关系来测定收缩期血压的装置。
BLOOD PRESSURE MEASUREMENT DEVICE, VEHICLE DEVICE, AND BLOOD PRESSURE MEASUREMENT PROGRAM
血压测定装置、车辆装置和血压测定程序
2021-04-09
Patent
Electronic Resource
Chinese
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