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Toward Continuous Breath Monitoring on a Mobile Phone Using a Frugal Conducting Cloth-Based Smart Mask
journal contributionposted on 2022-11-17, 00:33 authored by Pillalamarri Srikrishnarka, Raaga Madhuri Dasi, Sourav Kanti Jana, Tripti Ahuja, Jenifer Shantha Kumar, Ankit Nagar, Amoghavarsha Ramachandra Kini, Boby George, Thalappil Pradeep
A frugal humidity sensor that can detect changes in the humidity of exhaled breath of individuals has been fabricated. The sensor comprises a humidity-sensitive conducting polymer that is in situ formed on a cloth that acts as a substrate. Interdigitated silver electrodes were screen-printed on the modified cloth, and conducting threads connected the electrodes to the measurement circuit. The sensor’s response to changing humidity was measured as a voltage drop across the sensor using a microcontroller. The sensor was capable of discerning between fast, normal, and slow breathing based on the response time. A response time of ∼1.3 s was observed for fast breathing. An Android-based mobile application was designed to collect sensor data via Bluetooth for analysis. A time series classification algorithm was implemented to analyze patterns in breathing. The sensor was later stitched onto a face mask, transforming it into a smart mask that can monitor changes in the breathing pattern at work, play, and sleep.
voltage drop acrosssensitive conducting polymerlater stitched ontoconducting threads connectedbased mobile applicationmobile phone usingcollect sensor dataslow breathing basedinterdigitated silver electrodesfrugal conducting clothbased smart maskfrugal humidity sensorsmart masksensor usingface masksensor ’sensor comprises∼ 1via situ monitor changesmodified clothmeasurement circuitexhaled breathdetect changeschanging humiditybreathing patternanalyze patterns