柔性传感器生理信号监测系统设计及应用

Design and Application of a Physiological Signal Monitoring System Based on Flexible Sensors

摘要: 早产儿接受生命体征监护过程中，存在皮肤损伤风险，监测参数数量多，操作复杂，数据预警发布不及时，本文设计一种非接触式柔性床垫式监测系统，该系统传感硬件部分，整合聚偏氟乙烯心跳传感器，这类传感器英文名称为polyvinylidene fluoride，缩写PVDF，同时整合导电银–碳浆式呼吸传感器和GT1050温度传感器。控制部分依托意法半导体微控制器，这类芯片英文名称为STMicroelectronics Microcontroller，缩写STM32，实现三通道同步数据采集与信号预处理，并具备本地可视化显示功能。在实验室环境进行模拟测试，确认静息状态下，系统有心跳、呼吸及体温信号采集。测试数据显示，心跳信号波形清晰，主频集中在1~3 Hz范围内，呼吸信号保持稳定的周期性变化，可完整呈现呼吸运动过程，体温测量误差不超出±0.1℃范围，该系统拥有实用潜力，可为后续面向新生儿的非接触式多模态监护系统开发，积累技术验证结果和工程实践基础。

Abstract: During vital sign monitoring of preterm infants, there are risks of skin injury, a large number of monitored parameters, complex operation procedures, and delayed data warning release. To address these issues, a non-contact flexible mattress-based monitoring system is designed in this study. In the sensing hardware, a polyvinylidene fluoride (PVDF) heartbeat sensor is integrated, along with a conductive silver-carbon paste-based respiration sensor and a GT1050 temperature sensor. The control unit is built on an STMicroelectronics microcontroller (STM32), enabling three-channel synchronous data acquisition, signal preprocessing, and local visualization display. Simulation experiments were conducted under laboratory conditions. The results demonstrate that the system can successfully acquire heartbeat, respiration, and body temperature signals under resting conditions. The heartbeat signal exhibits a clear waveform with dominant frequency components concentrated in the range of 1~3 Hz. The respiration signal shows stable periodic variations, accurately reflecting the breathing process. The temperature measurement error is within ±0.1˚C. The proposed system demonstrates strong practical potential and provides a technical validation basis and engineering reference for the future development of non-contact multimodal monitoring systems for neonates.