SUTD – Thejus Pathmakumar, Manivannan Kalimuthu, Balakrishnan Ramalingam and Mohan Rajesh Elara
By giving the touch-and-inspect method a smart update, SUTD researchers have designed a sensor for autonomous cleaning robots that can quantify the cleanliness of a given area.

An overview of sample auditing sensors and its major components.
Over the years, cleaning robots have evolved from disc-shaped vacuum cleaners found in homes to advanced models that can navigate complex spaces like airports and train stations. As COVID-19 highlights the need to keep public spaces clean, how can we be sure that the areas covered by cleaning robots are indeed clean?
You can find more details at https://www.sutd.edu.sg/Research/Research-News/2021/9/how-robots-can-tell-how-clean-is-clean