Design and implementation of high precision ear pulse wave physiological signal detection device for human centrifuge training
10.19745/j.1003-8868.2024170
- VernacularTitle:载人离心机训练用高精度耳脉搏波生理信号检测装置的设计与实现
- Author:
Ke JIANG
1
;
Ming-Hao YANG
;
Hai-Xia WANG
;
Bao-Hui LI
;
Jing-Hui YANG
;
Xiao-Xue ZHANG
;
Zhong-Zheng GUO
;
Xiao-Yang WEI
Author Information
1. 空军军医大学空军特色医学中心,北京 100142
- Keywords:
ear pulse wave;
human centrifuge;
human centrifuge training;
physiological signal detection
- From:
Chinese Medical Equipment Journal
2024;45(9):35-40
- CountryChina
- Language:Chinese
-
Abstract:
Objective To design and implement a high-precision ear pulse wave physiological signal detection device for human centrifuge training to solve the problems in measurement and calibration of pilot ear pulse wave signal during human centrifuge training.Methods The high-precision ear pulse wave physiological signal detection device was composed of an ear pulse wave acquisition sensor,a signal acquisition and control unit and a host signal processing module.The ear pulse wave acquisition sensor had an ear-clip-like shape and consisted of an outer shell,an inner shell and an elastic steel plate;the signal acquisition and control unit was made up of an power supply module,a constant voltage module for the light source,a signal acquisition module,a master control module and a data transmission module,which had its software developed with an embedded system;the host signal processing module divided the signal processing into 2 phases of signal pre-processing and pulse wave signal monitoring and display.The detection performance of the device was verified by using a physiological electrical signal calibrator to test the ear pulse wave signals detected with the device;the effectiveness and stability of the device were validated by implementing human centrifuge training experiments with different loads.Results The voltage measurement error,amplitude-frequency characteristics and common mode rejection ratio detected by this device were all within the permitted ranges of JJG 760-2003 Verification Regulation for Electro Cardiac Monitor and JJG 954-2019 Verification Regulation of Digital Electroencephalographs;the device was capable of detecting the ear pulse wave signals of pilot during human centrifuge training in real time with little interference from motion and stable signal quality.Conclusion The device can accurately clarify the changes in the amplitude of the pilot's ear pulse wave during human centrifuge training and effectively reflect the changes in the pilot's cerebral blood flow under positive acceleration.[Chinese Medical Equipment Journal,2024,45(9):35-40]
