Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2013 Vol: 5 Issue: 12

Design and evaluation of the maintenance-free technologies for a novel digital methane detection system based on catalytic sensor

Abstract

Digital methane detecting and alarm miner’s lamp has proved to be a very effective methane monitoring technique in recent years. The mini methane detection system is the kernel of those lamps. The function of detection system based on analog circuit is limited, which leads to high maintenance costs and unstable performance. The maintenance-free technologies were developed and evaluated for a mini intelligent methane detection and alarm system using innovations in computer technology, modern signal analysis and processing technology in this paper. After introduced state of the art of intelligent methane detection systems, a mini intelligent methane detecting system was presented to research the maintenance-free technologies, which includes system-level auto-zero, automatic and visualized off-line calibration based on PC, and intelligent online calibration based on a wireless sensor network (WSN). The methods and steps of those technologies were described in detail. Finally, the experiments were carried out to validate and evaluate those technologies. The results show that the techniques to be the effective and efficient way to lighten workload on calibration, to prolong the off-line calibration cycle of the methane measuring device, and to improve the calibration accuracy. The size of the mini methane detection system allows it may to be mounted directly on a miner's alarm lamp and portable gas detector.