微弱瓦斯信号检测的原理和方法

瓦斯是发生在煤矿中重大自然灾害的根源之一，瓦斯爆炸严重威胁到煤矿作业人员的生命安全，影响煤矿的正常生产。实时准确地监测煤矿瓦斯气体浓度对保障安全生产具有十分重要的意义。本文采用相敏检波原理与DSP实现数字低通滤波相结合的方法来检测微弱的瓦斯浓度信号。

The Theory and Method of Weak Gas Signal Detection

The gas is one of the sources which are the major natural disaster in the coal mine. Fire damp explosion not only influences the normal production of the mineral but also threatens to the safety of the coal mine workers seriously. It is very important to measure the distribution of methane concentration in real-time. In this paper, phase sensitive detection principle and DSP digital low pass filter to detect the combination of weak gas concentration signals.