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What type of beer does your robot prefer?

Well, actually, how could a robot like one kind of beer better if it cannot distinguish one from the other? 
Right, but wrong! Apparently, Spanish researchers have managed to develop a "sense of taste" that can serve well a robot in distinguishing with an accuracy of over 80% a beer (brand, type….) which is much much better than what I can ever do!
Clearly one could imagine that with all the chemical analyses tools at our disposal it shouldn’t be that difficult to identify a specific type of beer with good accuracy. But chemical analyses is a long process and just sipping wouldn’t do. What researchers at the Autonomous University of Barcelona did was to develop electronic tongues consisting of an array of sensors containing 21 ions-selective electrodes. Some electrodes are able to detect ammonium and sodium, others can detect nitrate and chloride and other are responsive to general molecules.
The process leading to the identification of the beer mimics what happens in our brain when we taste something and it involves a lot of software, in our case neurones and in this case intensive processing through microchips.  Our taste buds react to some specific molecules and send the messages to the brain that interprets these signals (along with the one coming form the nose…) raising the perception of a specific taste than is therefore compared to previous experiences of that taste to lead to the identification of the beer.
The system developed works in a very similar way, and as we do, it learns new tastes getting better and better. And, as it happens to us if we want to become expert in wine  or beer tasting, you need to be coached by an expert in the field that tells us what to pay attention to (that sweetness emerging after tasting, the fruity flavour….). 
Researchers did just that. They supervised the tasting providing hints on what to pay attention to and provided connections among different categories: Schwarzbier, lager, double malt, Pilsen, Alsatian and low-alcohol.
Apparently, wine tasting is more complex than beer and more work will be needed. The idea is not to substitute a "sommelier" with a "robot" but to provide robots with a sense of taste that may be useful in performing certain tasks.
Interestingly, information technology is playing a crucial role, both in the learning and in making a sensation emerge out of a variety of signals.

About Roberto Saracco

Roberto Saracco fell in love with technology and its implications long time ago. His background is in math and computer science. Until April 2017 he led the EIT Digital Italian Node and then was head of the Industrial Doctoral School of EIT Digital up to September 2018. Previously, up to December 2011 he was the Director of the Telecom Italia Future Centre in Venice, looking at the interplay of technology evolution, economics and society. At the turn of the century he led a World Bank-Infodev project to stimulate entrepreneurship in Latin America. He is a senior member of IEEE where he leads the New Initiative Committee and co-chairs the Digital Reality Initiative. He is a member of the IEEE in 2050 Ad Hoc Committee. He teaches a Master course on Technology Forecasting and Market impact at the University of Trento. He has published over 100 papers in journals and magazines and 14 books.