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Lifetime tracing of cardiopulmonary sounds with low-power sound sensor stick connected to wireless mobile network

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Abstract

A wearable wireless cardiopulmonary sound sensing system with a low-power sound sensor stick connected to the wireless mobile network is proposed in this work. The system is composed of three parts, namely, the wearable sound sensor stick attached to the user’s chest for cardiopulmonary sound recording, the portable base station (PBS) for wireless data transmission which is usually a smart phone, and a remote data center for long-term data storage and analysis. An effective signal processing method is developed for the data center to analyze the cardiopulmonary sounds for health information extraction such as the heart rate. A prototype system has been built to validate the proposed system for lifetime tracing of cardiopulmonary sounds. The prototype sound sensor stick weighs 29 g, and the battery life is over 48 h with a 130 mAh battery. Experimental results from the prototype system are given, including the signal processing results and the measured power consumption. The heart rate calculation error of this system is within ±1 %.

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Acknowledgments

This work was supported, in part, by Tsinghua Internal Research Fund, Broadcom Foundation, and Shenzhen Nanshan Key Lab Fund No. KC2012ZDZJ0012A.

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Authors and Affiliations

  1. Institute of Microelectronics, Tsinghua University, Beijing, China

    Kai Yang, Hanjun Jiang, Wendi Yang, Frederic Mes, Chun Zhang & Zhihua Wang

  2. Research Institute of Tsinghua University in Shenzhen, Guangdong, China

    Qingliang Lin & Wen Jia

Authors
  1. Kai Yang
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  2. Hanjun Jiang
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  3. Wendi Yang
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  4. Frederic Mes
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  5. Chun Zhang
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  6. Zhihua Wang
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  7. Qingliang Lin
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  8. Wen Jia
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Correspondence to Kai Yang.

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Yang, K., Jiang, H., Yang, W. et al. Lifetime tracing of cardiopulmonary sounds with low-power sound sensor stick connected to wireless mobile network. Analog Integr Circ Sig Process 81, 623–634 (2014). https://doi.org/10.1007/s10470-014-0424-8

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  • DOI: https://doi.org/10.1007/s10470-014-0424-8

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