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Millisecond High Resolution Gas Concentration Sensor for Detecting Human Breath in Disaster Scenes and Difference Between Male and Female Waveform

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Abstract

In this paper, a new gas sensing technique is described for accurate, reliable measurement of gas molecule concentration. It is assumed that to used that the proposed gas sensor in case of disaster rescue situation for detecting survivors. Our newly proposed ultrasound usage in the chamber and a signal processing method could detect the temporal change of average molecular weight within a chamber with a high sampling rate. This device could measure the change of the gas concentration over 400 kHz sampling rate in principle. It was noted that at this speed there is not known commercially used or published gas sensing systems. Currently, we are able to observe the contrast between CO2 and air clearly over 50 dB S/N and we measured the real time human respiration process with constant time of one millisecond by using our proposed device. In addition, we compared between male and female typical respiration patterns in this paper. Therefore, this sensor will be useful to detect a small-difference molecular gas change of survivor’s breath in the disaster scenes.

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Authors and Affiliations

  1. Department of Electrical and Electronic Systems, Faculty of Engineering, University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan

    Hideki Toda & Genci Capi

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  1. Hideki Toda
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  2. Genci Capi
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Correspondence to Hideki Toda.

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Toda, H., Capi, G. Millisecond High Resolution Gas Concentration Sensor for Detecting Human Breath in Disaster Scenes and Difference Between Male and Female Waveform. Int J of Soc Robotics 4 (Suppl 1), 101–106 (2012). https://doi.org/10.1007/s12369-011-0132-9

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  • DOI: https://doi.org/10.1007/s12369-011-0132-9

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