Exploring Temperature-Modulated Operation Mode of Metal Oxide Gas Sensors for Robust Signal Processing

Proceedings

Defregger, Stefan¹  Boiger, Romana²  Grbic, Mirza³ 

[1] Author to whom correspondence should be addressed.;Materials Center Leoben Forschung GmbH, Roseggerstraße 12, 8700 Leoben, Austria;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018

关键词: metal oxide gas sensors;    temperature-modulated operation;    wavelet transform;    gas concentration quantification;   

DOI  :  10.3390/proceedings2131058

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Metal oxide (MOx) gas sensor signals are mainly governed by adsorption and desorption processes of oxygen and its reaction with surrounding gas molecules. Different target gases exhibit different reaction rates leading to characteristic sensor responses for specific gas species and their concentrations. In this work, we compare temperature-modulated sensor operation (TMO) with sensor operation at a single temperature. Further, we explore if under specific TMO regimes, a simple signal processing allows for quantification of gas concentrations. We specifically investigate, if the relevant information can be captured in selected discrete wavelet coefficients. In addition, we compare the results received from this wavelet features to reaction rate evaluation features.

【 授权许可】

CC BY