Thermal Modulation of a High-Bandwidth Gas Sensor Array in Real-Time for Application on a Mobile Robot

Proceedings

Xing, Yuxin¹  Cole, Marina²  Vincent, Timothy A.³ 

[1] Author to whom correspondence should be addressed.;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018;School of Engineering, University of Warwick, Coventry CV4 7AL, UK

关键词: MOX;    mobile robot;    thermal modulation;    high-b;    width;    interactive mapping;   

DOI  :  10.3390/proceedings2130858

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

A new signal processing technique has been developed for resistive metal oxide (MOX) gas sensors to enable high-bandwidth measurements and enhanced selectivity at PPM levels (<50 PPM VOCs). An embedded micro-heater is thermally pulsed from 225 to 350 °C, which enables the chemical reactions in the sensor film (e.g., SnO2, WO3, NiO) to be extracted using a fast Fourier transform. Signal processing is performed in real-time using a low-cost microcontroller integrated into a sensor module. The approach enables the remove of baseline drift and is resilient to environmental temperature changes. Bench-top experimental results are presented for 50 to 200 ppm of ethanol and CO, which demonstrate our sensor system can be used within a mobile robot.

【 授权许可】

CC BY