Advanced TDLS System for CO2 & Blackdamp Detection in Mines - DoP

二氧化碳（CO2）每天在煤矿中积累，原因包括煤炭氧化、人体呼吸、岩石爆破、火灾、腐烂木材等。如果矿井所有区域没有足够的通风来稀释过量的CO2，则氧气水平耗尽的地方会形成“黑潮”气氛，CO2水平会增加20%，由于氧气的置换，会造成直接的人类窒息风险。目前的电气体传感器不能作为固定传感器在这种潜在的爆炸性矿井气体环境中使用，因为火花的风险。在这个原型项目的发展下，OptoSci提出使用气体传感器设计和根据先前的概念验证项目设计的新颖信号处理方案来生产实用的、本质安全的、基于激光和光纤的多点CO2检测系统，然后在工作煤矿中现场试验系统的性能。

Carbon Dioxide (CO2) builds up daily in coal mines from oxidation of coal, humanrespiration, rock blasting, fires, rotting timbers, etc. Without adequate air ventilation in allareas of the mine to dilute excess CO2, a ”blackdamp” atmosphere can build up where theoxygen level is depleted and CO2 levels can increase up to 20%, creating an immediatehuman asphyxiant risk due to displacement of oxygen. Current electrical gas sensors cannotbe used as fixed sensors in this potentially explosive mine gas environment because of thespark risk. Under this Development of Prototype project OptoSci proposes to produce apractical, intrinsically safe, laser and fibre optic based multipoint CO2 detection system usingthe gas sensor designs & novel signal processing schemes devised under a previous Proof ofConcept project and then field trial the system's performance in a working coal mine.