Smartphone-based air quality measurement gets personal: Page 6 of 7

June 16, 2020 //By Alexander Herrmann, Project Director Optical Sensing Business, and Dr. Richard Fix, Product Portfolio Manager, Bosch Sensortec
 Smartphone-based air quality measurement gets personal
This article provides insights into new PM2.5 and VOC sensing technologies that enable personal air quality monitoring to improve people’s health and well-being.

Another application could be detecting when a baby’s diaper needs changing. The sensor hardware can measure temperature, pressure, humidity and the presence of gases – but the parents do not want this level of detail, they just need to know when action is required. As about 19 % of the population over the age of 20 suffer from smell disorders, this "basic" information can help them to regain some quality of life6. A mathematical model, developed with machine learning, can be used to translate the raw sensor data into a simple status indication, with AI fine-tuning the model in operation.

Figure 4: An image illustrating the diaper application.

Bosch is further extending the gas sensor’s range to add new capabilities and to enable new use cases. New gas sensing technologies will include more sophisticated software and a wider range of gas detection capabilities. For example, the gas sensor could detect different gas compositions – which, when compared with reference data, would enable smells to be identified (Figure 5). Examples of use cases could be monitoring of the cleanliness status of public spaces, classification of bad breath or detection of spoiled food.

Figure 5: Environmental sensing detects different gas compositions.

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