Title :
A ZigBee-Based Wireless Sensor Network Node for Ultraviolet Detection of Flame
Author :
Cheong, Pedro ; Chang, Ka-Fai ; Lai, Ying-Hoi ; Ho, Sut-Kam ; Sou, Iam-Keong ; Tam, Kam-Weng
Author_Institution :
Fac. of Sci. & Technol., Univ. of Macau, Macau, China
Abstract :
This paper describes a ZigBee-based wireless sensor network node for the ultraviolet (UV) detection of flame. The sensor node is composed of a ZnSSe UV photodetector, a current-sensitive front end including a high-gain current-to-voltage amplifier with 120 dB and a logarithm converter, and a transceiver operated at a 2.4-GHz industrial, scientific, and medical band. A passive photodetector is designed to have a cutoff at 360 nm and convert the UV emission of flame into picoamperes. Including mixed signal processing and ZigBee transmission, the speed of flame detection is as fast as 70 ms. The sensor node consumes only an average of 2.3 mW from a 3.3-V supply. The performance of a prototype sensor node was verified when the luminous flame was imaged onto the sensor node with different angles ranging from -30° to 30° and distances of 0.1, 0.2, and 0.3 m enabling effective fire safety applications.
Keywords :
Zigbee; amplifiers; flames; photodetectors; ultraviolet detectors; wireless sensor networks; UV photodetector; ZigBee-based wireless sensor network node; distance 0.1 m; distance 0.2 m; distance 0.3 m; flame; frequency 2.4 GHz; gain 120 dB; high-gain current-to-voltage amplifier; logarithm converter; mixed signal processing; power 2.3 mW; size 360 nm; time 70 ms; ultraviolet detection; voltage 3.3 V; Detectors; Fires; Photodetectors; Wireless sensor networks; Zigbee; Flame analysis; ZigBee; ultraviolet (UV) detector; wireless sensor network (WSN);
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2011.2119455
