The Wireless Pulse Sensor Based on PVDF Fibers Derived from the Electrospinning Technology
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摘要: 采用静电纺丝工艺制备了聚偏氟乙烯(PVDF)纤维，设计了一种无线可穿戴式的脉搏监测系统. 利用柔性纤维结构对于皮肤表面的良好贴合能力和高灵敏度，检测桡动脉处的表皮脉搏振动情况，通过蓝牙传输方式将脉搏信号实时发送至上位机，实现对脉搏的长时间监控. 结果表明: 该纤维结构传感器的灵敏度几乎是无结构压电薄膜的2倍；与商用指夹式血氧脉搏仪相比，平均脉率误差低于3%，在监测人体生理信号的医学领域具有实用价值.
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关键词:
- 静电纺丝 /
- 聚偏氟乙烯(PVDF) /
- 灵敏度 /
- 脉搏监测 /
- 无线传输
Abstract: A wireless wearable pulse-monitoring system was designed based on PVDF fibers derived from the electrospinning process. The good adhesion of the flexible fibers to the skin surface and their high sensitivity helped to detect the pulse vibration at radial artery's epidermis. The pulse signal was sent to the computer in real time through Bluetooth transmission to realize remote and long-term monitoring of the pulse. The results show that the sensitivity of the fiber structure-derived sensor is almost twice that of the piezoelectric film without fiber structure. Compared with commercial clamp-type oximetry, the average error of the new system is less than 3%, which suggests potential applicability in monitoring the physiological signals of the human body. -
图 2 PVDF样品的SEM图及PVDF纤维的直径分布
Figure 2. The SEM images of PVDF samples and the diameter distribution of PVDF fibers
图 5 脉搏实测波形及脉率测试数据的对比
Figure 5. The comparison of measured sphygmus waveform and sphygmus test data
表 1 静电纺丝制备前后的样品EDS分析
Table 1. The EDS analysis of samples before and after electrospinning
样品 元素 原子数百分比/% 质量分数/% PVDF粉末 C 64.784 53.768 F 35.126 46.232 PVDF纤维 C 65.852 54.937 F 34.148 45.063 
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