Revolutionary electronic 'smell' sensors to detect terrorists

Groundbreaking new sensor chips, designed by researchers at the Fraunhofer Institute for Communication, Information Processing and Ergonomics, aim to covertly detect terrorists in public places.

The researchers, from the Fraunhofer centre in Wachtberg, Germany, have developed sensitive electronic 'noses' that can capture the 'smell' of explosive substances. The sensor chips are covered in oscillating crystals which change frequency when chemicals from explosive substances are detected, alerting security personnel to the presence of explosives in the vicinity. The system, called HAMLeT (Hazardous Material Localisation and Person Tracking), is then able to track the carrier of the chemicals using a secondary system using laser scanners. The data can then be turned into a precise image showing individual pedestrians and highlighting those that are carrying explosives.

“HAMLeT’s real achievement is its ability to collate all the data and convert it into a clear and accurate overall picture,” says Dr Wolfgang Koch, head of the research department.

Tests to confirm the system's ability to track explosives were carried out with the help of the German Armed Forces, and proved that HAMLeT was competent in sensing dangerous substances being carried by individuals in crowds. If implemented in real situations, the sensors could be fitted in airport walls to track potential terrorists.

For more information on the project, contact Wolfgang Koch at wolfgang.koch@item.fraunhofer.de

Published: Wednesday, 13th January 2010 by Tom Freeman

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