Title :
Reliable recognition of low level simulated chemical weapons
Author :
Evju, Jon K. ; Meier, Douglas C. ; Montgomery, Christopher B. ; Semancik, Steve ; Boger, Zvi
Author_Institution :
Div. of Process Meas., Nat. Inst. of Stand. & Technol., Gaithersburg, MD
fDate :
Oct. 30 2005-Nov. 3 2005
Abstract :
The detection of chemical warfare simulants (CWSs) in the presence of high concentrations of common interferences was demonstrated with solid-state chemical microsensor arrays. Conductometric SnO2 and TiO2 sensing films deposited on microhotplates were utilized as transducers. The embedded microheaters were used to modulate the temperature of the sensor-array elements, while measuring conductance at each temperature. The resulting temperature-modulated sensing data was normalized to the high-temperature conductance and an artificial neural network was used to perform pattern-recognition on the resultant conductivity data vectors
Keywords :
array signal processing; chemical sensors; microsensors; neural nets; pattern recognition; tin compounds; titanium compounds; SnO2; TiO2; artificial neural network; chemical warfare simulant detection; embedded microheater; high-temperature conductance; low level simulated chemical weapon; microhotplates; pattern-recognition; solid-state chemical microsensor array; Artificial neural networks; Chemical elements; Conductive films; Conductivity; Interference; Microsensors; Solid state circuits; Temperature sensors; Transducers; Weapons;
Conference_Titel :
Sensors, 2005 IEEE
Conference_Location :
Irvine, CA
Print_ISBN :
0-7803-9056-3
DOI :
10.1109/ICSENS.2005.1597936
