Wireless sensor networks for home automation or environment monitoring require low-cost low-power sensors. Carbon monoxide (CO) metal–oxide (MOX) sensors could be suitable in terms of device cost, but they show some severe limits, such as the need to be heated, which means large power consumption and the need for complex and frequent calibration procedures, which increases the overall cost. This paper investigates the possibility to partially overcome these limits by a low-cost detection system based on a suitable commercial sensor (TGS 2442, Figaro, Inc.) and an ad hoc measurement technique exploiting specifi cally tailored temperature profiles. To this aim, the authors study the dynamic behavior of low-power CO MOX sensors operated with pulsed temperature profiles by means of two approaches: 1) sensor modeling and 2) experimental evaluation. To analyze how the sensor dynamic response changes as a function of the CO concentration, the authors individuate a temperature profile, which ensures satisfactory sensitivity to the target gas and very low power consumption. Moreover, some parameters describing the sensor response shape are selected, which prove to be signifi- cant in terms of both robustness to environmental conditions and calibration simplicity.
Scheda prodotto non validato
Scheda prodotto in fase di analisi da parte dello staff di validazione
|Titolo:||Model and experimental characterization of dynamic behavior of low power Carbon Monoxide MOX sensors operated with pulsed temperature profiles|
|Citazione:||Bicelli, S., Depari, A., Faglia, G., Flammini, A., Fort, A., Mugnaini, M., et al. (2009). Model and experimental characterization of dynamic behavior of low power Carbon Monoxide MOX sensors operated with pulsed temperature profiles. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 58(5), 1324-1332.|
|Appare nelle tipologie:||1.1 Articolo in rivista|