基于光敏三极管的指端动态血压监测仪
Fingertip Real-Time Blood Pressure Monitor Based on Phototransistor
DOI: 10.12677/JSTA.2019.73009, PDF,    科研立项经费支持
作者: 袁安怡*, 李学磊, 赵晓锋：黑龙江大学，黑龙江省普通高等学校电子工程重点实验室，黑龙江 哈尔滨
关键词: 光敏三极管；实时血压测量；脉搏信号处理电路；Photo Transistor； Real-Time Blood Pressure Monitor； The Pulse Signal Processing Circuit
摘要: 本文基于光敏三极管设计、制作了指端动态血压监测仪，该监测仪包括光信号发射/采集单元、信号处理电路和指尖固定装置。光信号发射/采集单元包括一个红色LED和两个光敏三极管，根据指端流动的血液对光吸收情况不同，该光敏三极管用于采集流经指端血液吸收后的光信号。基于光电效应，当接收到不同的光信号时，光敏三极管的基极电流将发生相应变化，引起电路输出电压变化，实现对脉搏信号的监测。信号处理电路部分完成两个光敏三极管构成的差分结构输出信号放大、滤波、A/D转换等，根据血压与脉搏波的关系，利用单片机对数据进行处理，分析给出血压动态变化情况并进行显示。结果表明该测试系统可实现血压测量，具有实时性和便携性的特点。
Abstract: In this paper, a fingertip real-time blood pressure monitor is designed and fabricated with photo-transistor, which consists of the signal processing circuit and fingertip clamp. The optical signal generating/collecting unit comprises a LED and two phototransistors. According to the various light-absorption of flowing blood, the phototransistor is used for collecting the optical signal ab-sorbed by the blood flowing through the fingertip. Based on the photo electric effect, when the phototransistor receives different optical signals, the base current changes correspondingly, which causes the output voltage of the circuit to change, and able to monitor the electrocardio signal. The signal processing circuit completes the amplification, filtering, A/D conversion of the output signal of the differential structure composed of two phototransistors. On the basis of the relationship between blood pressure and pulse trapping, the data are processed by the microprocessor, and the dynamic change of blood pressure is analyzed and displayed. Finally, the test and analysis of the fingertip real-time blood pressure monitor proves its feasibility. The result shows that the blood pressure monitor is able to achieve real-time blood pressure measurement, as well as possesses the characteristics of real-time and portability.
文章引用：袁安怡, 李学磊, 赵晓锋. 基于光敏三极管的指端动态血压监测仪[J]. 传感器技术与应用, 2019, 7(3): 75-85. https://doi.org/10.12677/JSTA.2019.73009

参考文献

[1] 殷广亮, 卢文科, 倪珊珊. 适合连续血压测量的脉搏波分析方法的研究[J]. 微型机与应用, 2015, 34(23): 11-13.
[2] 马海燕, 杨犀. 三极管放大电路的设计思路[J]. 科学技术创新, 2017(36): 190-191.
[3] Ding, X.R., Zhang, Y.T. and Liu, J. (2016) Con-tinuous Cuffless Blood Pressure Estimation Using Pulse Transit Time and Photoplethysmogram Intensity Ratio. IEEE Transactions on Biomedical Engineering, 63, 964-972. [Google Scholar] [CrossRef] 
[4] Holz, C. and Wang, E.J. (2017) Glabella: Continuously Sensing Blood Pressure Behavior Using an Unobtrusive Wearable Device. Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, 1, Article No. 58. [Google Scholar] [CrossRef] 
[5] 郑开明. 基于单片机设计的心率检测仪[J]. 电脑知识与技术, 2012, 8(6): 1431-1433.
[6] Alami, M., Temcamani, F., et al. (2017) Low Voltage, High CMRR, and Wide Bandwidth Novel Current Mode Current Controlled Instrumentation Amplifier. Analog Integrated Circuits and Signal Processing, 90, 199-205. [Google Scholar] [CrossRef] 
[7] Bao, K., Gu, Y.X. and Gao, J. (2016) Continuous Blood Pressure Measurement System Based on Pulse Wave Transit Time. Journal of Biomedical Engineering Research, 35, 41-45.
[8] 杨刚, 屈胜年, 王曼. 基于手指动脉波的无创血压测量系统[J]. 西安邮电大学学报, 2017, 22(2): 116-121.
[9] Luo, C., Li, T.Y., Quan, X.L., et al. (2008) A New Algorithm of Blood Pressure Measurement Based on Oscillometric Method. Automation Congress, Vol. 3, Waikoloa, 28 September-2 October 2008, 1-4.
[10] 刘沛, 庞宇, 吴宝明, 等. 脉搏波形态特征与血压相关性的研究[J]. 生命科学仪器, 2015(1): 31-34.
[11] Inan, O.T., Migeotte, P.F., Park, K.S., et al. (2017) Ballistocardiography and Seismocardiography: A Review of Recent Advances. IEEE Journal of Biomedical and Health Informatics, 19, 1414-1427. [Google Scholar] [CrossRef] 

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