Simultaneous measurement of two biological signals using a multi-layered polyvinylidene fluoride sensor.

Long-Nguyen Manh, Jinghua Li, Hyunkyu Kweon, Younghun Chae

Scientific reports 2022 Jan 27

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Cardiovascular and deep breathing diseases can be detected by measuring human signals such as heart rate, respiration, and blood pressure, which are important physiological parameters for accessing the state of the body. However, conventionally, heart and respiration rates are monitored using different sensors, which is cumbersome and can further increase the psychological burden on patients. To address these issues, this report proposes a sensor consisting of two stacked elements that can simultaneously measure heart and respiration rates. The two signals received can be expressed separately as heart and respiration rates after signal processing. The two stacked elements are composed of polyvinylidene fluoride thin film bonded to a polydimethylsiloxane substrate. One element (element 1) measures movement related to the heart, and the other (element 2) measures movement related to breathing. Elements 1 and 2 were experimentally observed to have sensitivities of 0.163 V/N and 0.209 V/N, respectively. In addition, the proposed system was compared with a commercial digital heart rate and respiration rate measurement instrument and was verified to be effective for simultaneous measurement of human vital signals with multiple sensors. In addition, the proposed system is flexible, lightweight, and inexpensive, making it convenient and economical. © 2022. The Author(s).

Citation

Long-Nguyen Manh, Jinghua Li, Hyunkyu Kweon, Younghun Chae. Simultaneous measurement of two biological signals using a multi-layered polyvinylidene fluoride sensor. Scientific reports. 2022 Jan 27;12(1):1507