Add to favorite
 
123
Subscribe to our Newsletters Subscribe to our Newsletters Get Daily Updates RSS


Efficient Method of Teaching Electronic Noses Developed in Russia
May 29, 2018 15:34


Scientists of the Gagarin Saratov State Technical University together with colleagues from the Karlsruhe Technology Institute (Germany) and the Manas University (Kyrgyzstan) have developed an efficient way of training electronic noses. The results of the study are published in The Sensors.
Electronic noses are compact devices for the recognizing the smells of a wide range of chemicals. Unlike simple gas sensors, they are capable of not only distinguishing mixtures, but also memorize new smells through training with artificial intelligence systems. For 30 years scientists have been trying to create efficient electronic noses. The basic idea is not to determine which odor molecules appear in the air, but just to take a set of gas sensors that react to the appearance of certain impurities in the air. And afterwards "artificial intelligence" is used - the computer learns to recognize particular smells.
Training of the electronic nose is similar to the training of search dogs: a computer equipped with sensors is demonstrated certain smell to and imprinted under a specific label. For example, the sensor is aimed at searching for the smell of a rose in the atmosphere. The computer memorizes what kind of "image" a rose has and subsequently distinguishes it, for example, from the smell of sauerkraut.

But, unlike the biological smell system, the electronic nose, when placed in real conditions, with a mix of uncontrolled impurities arising in the surrounding atmosphere, begins to "get confused" in a few days. Scientists, often dealing with gas sensors, of course, know what it is about. "The fact is that the sensors are unstable and their readings drift with time," one of the project authors, Victor Sysoev explained.  "Therefore we need stable sensors that avoid drift. We have demonstrated how to solve this challenge with an electronic nose based on a multisensor metal oxide matrix of.”
Stable high-sensitivity sensors based on single-crystal nanofibers have been developed at the Gagarin Saratov State Technical University. But it turned out that electronic noses on their basis can accurately detect smells for only a week or two, and then require recalibration. Therefore, the University specialists tried to take a fresh look at this problem. It is all about a fast algorithm for recalibrating sensors with the possibility of fine tuning in the process of device’ operation.

"We have found out that the stability of the electronic nose depends mainly on random changes in the air composition, and the introduction of the nose training procedure ensures its stability for many years. Moreover, we have proved the ability of the device to function for more than eight years, - no one has ever demonstrated such a long and successful operation of artificial noses before,” - Victor Sysoev added.
This development is of great importance for practitioners, since it can be used to create an "ideal" electronic nose, which is a stable and simple technical tool for analyzing the composition of gas media.




Author: Vera Ivanova

Tags:      

Next Previous

You might also find interesting:

Making Solar Batteries Cheaper and More Effective Making Gold Ingots from Gold Dust Does Hen Food Affect Egg's Nutrients? Students to Grow Nanotubes Reconstruction: How Neanderthal People Hunted









Comment on our site


RSS   twitter   facebook   submit

Bookmark and Share

search on the map
TAGS:
Yaroslavl   Russian business  Spacecrafts  Entertainment Center   Zaraysk  Russian Cinema  Book Market  Russian-Georgian relations  Russian regions  Pushkin Museum of Fine Arts  sanctions  Ski resorts  Alexander Sergeev  Lipetsk   Russian events  Mercedes-Benz Fashion Week Russia  Robots  Russian media  Semyon Varlamov  Sakhalin  Russian national colours  third places Moscow  Legal Services in Russia  Russian directors  privatisation  Cannes Film Festival  Maloyaroslavets  travel to Russia  Moscow Museum of Modern Art  Festivals in Moscow  Exhibitions in Moscow  Landscapes  Russia  Golden Ring Cities  Orthodox Church  Bastille Day  Leonid Sologub  Andrey Tupolev  Russian hospitality industry  jobs in Russia  Moscow  Russian tourism  Russian transportation  Schengen visa  Kaliningrad  Russian economy  Chelyabinsk meteorite  St. Petersburg  Oriental Arts Museum  Pussy Riot case 


Travel Blogs
Top Traveling Sites