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Resolving Fast Gas Transients with Metal Oxide Sensors
ACS Sensors ( IF 8.2 ) Pub Date : 2021-02-01 , DOI: 10.1021/acssensors.0c02006
Damien Drix 1 , Michael Schmuker 1
Affiliation  

Electronic olfaction can help detect and localize harmful gases and pollutants, but the turbulence of the natural environment presents a particular challenge: odor encounters are intermittent, and an effective electronic nose must therefore be able to resolve short odor pulses. The slow responses of the widely used metal oxide (MOX) gas sensors complicate the task. Here, we combine high-resolution data acquisition with a processing method based on Kalman filtering and absolute-deadband sampling to extract fast onset events. We find that our system can resolve the onset time of odor encounters with enough precision for source direction estimation with a pair of MOX sensors in a stereo-osmic configuration.

中文翻译:

用金属氧化物传感器解决快速气体瞬变问题

电子嗅觉可以帮助检测和定位有害气体和污染物,但是自然环境的湍流提出了一个特殊的挑战:气味的接触是断断续续的,因此有效的电子鼻必须能够解决短时的气味脉冲。广泛使用的金属氧化物(MOX)气体传感器的响应速度较慢,使任务复杂化。在这里,我们将高分辨率数据采集与基于卡尔曼滤波和绝对死带采样的处理方法相结合,以提取快速的开始事件。我们发现,我们的系统可以通过一对立体声配置的MOX传感器,以足够的精度解决气味接触的开始时间,以进行源方向估计。
更新日期:2021-03-26
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