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Vol. 219, Issue 1, January 2018, pp. 9-16

 

Bullet

 

Mobile Sensor System AGaMon for Breath Control: Numerical Signal Analysis
of Ternary Gas Mixtures and First Field Tests
 

1, * Rolf Seifert, 2 Thorsten Conrad, 2 Jens Peter, 1 Hubert B. Keller

1 Institute of Applied Informatics (IAI), Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
2 3S GmbHD-66121 Saarbr?cken, Germany
1 Tel.: +49-721-60824411, fax: +49-721-60822602

E-mail: rolf.seifert@kit.edu

 

Received: 10 November 2017 /Accepted: 4 January 2018 /Published: 31 January 2018

Digital Sensors and Sensor Sysstems

 

Abstract: An innovative mobile sensor system for breath control in the exhaled air is introduced. In this paper, the application of alcohol control in the exhaled air is considered. This sensor system operates semiconducting gas sensor elements with respect to the application in a thermo-cyclic operation mode. This operation mode leads to so-called conductance-over-time-profiles (CTPs), which are fingerprints of the gas mixture under consideration and can be used for substance identification and concentration determination. Especially for the alcohol control in the exhaled air, ethanol is the leading gas component to be investigated. But, there are also other interfering gas components in the exhaled air, like H2 and acetone, which may influence the measurement results. Therefore, a ternary ethanol-H2-acetone gas mixture was investigated. The establishing of the mathematical calibration model and the data analysis was performed with a newly developed innovative calibration and evaluation procedure called ProSens 3.0. The analysis of ternary ethanol-H2-acetone gas samples with ProSens 3.0 shows a very good substance identification performance and a very good concentration determination of the leading ethanol component. The relative analysis errors for the leading component ethanol were in all considered samples less than 9 %. First field test performed with the sensor system AGaMon shows very promising results.

 

Keywords: Alcohol control, Mobile sensor system, Thermo-cyclic operation, Data analysis, Substance identification, Concentration determination, Field test.

 

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