This article presents the design of a miniature detection system and its associated signal processing electronics, which can detect and selectively recognize vapor traces of different explosives in the air. It is based on the array of surface-functionalized COMB capacitive sensors and extremely low noise, analog, integrated electronic circuit, hard-wired digital signal processing hardware and additional software running on a PC. The instrument is sensitive and selective, consumes a minimum amount of energy, is very small (few mm3), and is insensitive to mechanical influences. Using an electronic detection system built of low noise analog front-end and hard-wired digital signal processing, it is possible to detect less than 3 TNT molecules in 1012 molecules of the air at 25oC on a 1 Hz bandwidth using 10 mA current from a 5V supply voltage.
B.04 Guest lecture
COBISS.SI-ID: 11045716This paper presents digital signal processing for a miniature, multi-channel, multi-sensor detection system, based on chemically functionalized micro-capacitors and low noise integrated analog electronics and appropriate digital signal processing. For such multi-channel measurements with extreme requirements regarding sensitivity, it is necessary to have the appropriate analog signal processing electronics, as well as digital signal processing hardware, algorithms, and software, which is described in the article. The complete architecture of the DSP part of a multi-channel sensor measurement system is explained, together with some simulation and the measured results.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 11237460This is the PhD thesis of Gregor Jakša, who was participating in synthesis and characterization of receptor molecules for a multichannel vapor trace detection system.
C.07 Other editorial board
COBISS.SI-ID: 1536311491