Journal
ACS SENSORS
Volume 6, Issue 3, Pages 688-692Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.0c02006
Keywords
accelerated gas sensing; metal oxide sensors; event-based sampling; kalman filter; neuromorphic
Funding
- EU [785907, 945539]
- MRC grant [MR/T046759/1]
- MRC [MR/T046759/1] Funding Source: UKRI
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The study successfully combines high-resolution data acquisition with a specific processing method to extract fast onset events of short odor pulses, which can effectively address the challenges faced by electronic noses in natural environments.
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.
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