Research on Physiological Signal Simulator of Respiratory Monitoring Device Based on
Dynamic Mechanical Analysis and Micro-Vibration Detection
LI Shui1, RAN Lini1,2, LI Jiagei1, LI Jinglii1
1. Institute for Medical Devices Control, National Institutes for Food and Drug Control, Beijing 102629, China;
2. Department of Biomedical Engineering, Chongqing University, Chongqing 400044, China
Abstract：Objective There was no unified and effective evaluation method and platform for the sensitivity and accuracy
assessment of respiratory monitoring devices based on micro-vibration detection at home and abroad, which had hindered the
further development of such products. In order to facilitate the performance evaluation of the respiratory monitoring device for
micro-vibration detection, this paper aim to proposes the development of a simulated vibration generation platform based on the
reciprocating motion of cam. Methods By amplifying the analog signal through a the controller, the cam structure was driven
to apply vibrational pressure to the flexible cavity according to the set vibration amplitude and frequency, generating microdisplacement
similar to that generated by the human body surface. Due to the different generating units of human breathing,
coughing and other actions, each vibration unit needed to work independently. Under the close cooperation of multiple vibrating
heads, the resonance signal similar to the human body was ultimately generated after modulation by the flexible
cavity. Results The measured data showed that the system could be input with edited waveforms by professionals according to
the clinical test data. It could output five waveforms: normal breathing, hypoventilation, apnea, asthma and cough; the amplitude
and frequency were adjustable. Conclusion In general, the developed testing platform can carry out relevant tests on respiratory
monitoring devices based on micro-vibration detection, which is beneficial for scientifically and effectively evaluating the
performance and immunity of respiratory monitoring devices based on micro-vibration detection. It helps to form a reasonable
quality evaluation specification for respiratory monitoring device based on micro-vibration detection.
李澍1，冉琳1,2，李佳戈1，李静莉1. 基于动态力学分析的微振动检测的
呼吸监测装置生理信号模拟器研究[J]. 中国医疗设备, 2023, 38(12): 35-40.
LI Shui1, RAN Lini1,2, LI Jiagei1, LI Jinglii1. Research on Physiological Signal Simulator of Respiratory Monitoring Device Based on
Dynamic Mechanical Analysis and Micro-Vibration Detection. China Medical Devices, 2023, 38(12): 35-40.
