Title :
SAW multisensor for a PCMCIA environmental data card
Author :
Stab, Helmut ; Plötner, Matthias ; Fischer, Wolf-Joachim
Author_Institution :
Semicond. & Microsyst. Technol. Lab., Tech. Univ. Dresden, Germany
Abstract :
Chemical sensors for gases like NO2, NH3, SO 2, CO2 sensitive in a wide range are necessary for monitoring of environmental data. SAW chemical sensors exploiting the mass loading effect offer an excellent opportunity to detect gases and vapors within the required concentration range. In this contribution a multisensor device is presented that consists of a PCMCIA card internationally standardized and a system of up to 4 SAW microsensors placed within an air sampling box on the card. This offers a low-cost solution for mobile environmental gas monitoring at highly loaded and exposed places. Single sensor device preparation, experimental setup for testing SAW gas sensors and an ASIC for device control as well as for signal processing has been developed. Results of NO2 gas sensor measurements are presented
Keywords :
air pollution measurement; application specific integrated circuits; computerised monitoring; gas sensors; intelligent sensors; memory cards; microsensors; sensor fusion; surface acoustic wave sensors; NO2; PCMCIA environmental data card; SAW chemical sensors; SAW delay line; SAW microsensors; SAW multisensor; air sampling box; control logic; device control ASIC; dual sine-wave oscillator sensor; internationally standardized card; low-cost solution; mass loading effect; mobile environmental gas monitoring; signal processing; single sensor device preparation; Application specific integrated circuits; Chemical sensors; Gas detectors; Gases; Microsensors; Monitoring; Signal processing; Signal sampling; Surface acoustic waves; Testing;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762206
