Heart-rate monitoring with an ethyl alpha-cyanoacrylate (EtCNA) based fiber Fabry-Perot (F-P) sensor is presented. The fiber F-P sensor is fixed in a capillary tube by using the EtCNA binder. Due to the lower Young's modulus of the EtCNA, the sensor can detect low frequency vibration with a high sensitivity. The fiber sensor is attached in a specially designed bracket to obtain the stable data. When the sensor with bracket is put on the human body, the heart-rate can be monitored accurately by monitoring the laser intensity variation induced by the heartbeat. Experimental results show that the sensor has the strain sensitivity of 2.57 pm/μN with good responses to low frequency vibrations of 1 Hz, 2 Hz and 3 Hz. The maximum and the minimum mean square deviations of the volunteers' data are 4.434210 and 0.667499, respectively. Moreover, it has good adaptability to measure the heart-rate on different positions of human body, such as wrist, chest and neck. Due to the advantages of small size, low cost, good adaptability, pollution-free and no harm to body. Our proposed sensor is expected to be widely used in heart disease monitoring.

中文翻译：

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使用基于α-氰基丙烯酸乙酯的光纤法布里-珀罗传感器进行心率监测


提出了使用基于 α-氰基丙烯酸乙酯 (EtCNA) 的光纤法布里-珀罗 (FP) 传感器进行心率监测。使用 EtCNA 粘合剂将光纤 FP 传感器固定在毛细管中。由于EtCNA的杨氏模量较低，该传感器可以高灵敏度地检测低频振动。光纤传感器安装在专门设计的支架上以获得稳定的数据。当带支架的传感器戴在人体上时，通过监测心跳引起的激光强度变化，可以准确监测心率。实验结果表明，该传感器的应变灵敏度为2.57 pm/μN，对1 Hz、2 Hz和3 Hz低频振动有良好的响应。志愿者数据的最大和最小均方偏差分别为 4.434210 和 0.667499。而且对手腕、胸部、颈部等人体不同位置的心率测量具有良好的适应性。由于具有体积小、成本低、适应性好、无污染、对身体无伤害等优点。我们提出的传感器有望广泛应用于心脏病监测。