摘要
针对煤矿井下瓦斯检测中常因地下地质结构中含有的即有噪声,以及矿井中使用大量的变频设备所产生的高次谐波和电磁脉冲,使其本来不明显的瓦斯信号变得更加微弱,提出了一种锁相放大实现微弱信号检测的原理,再结合DSP优化算法实现的高速数据处理能力,描述了对该系统的数值及仿真分析,结果表明,该系统能够很好地抑制地质及生产中的噪声影响,恢复、增强和方便提取有用的微弱瓦斯信号,实现了对微弱瓦斯信号的实时在线检测。
In the signal detection of coal mine gas,due to the noise contained in the underground geological structure and the high harmonic,electromagnetic pulse produced in the large use of frequcency devices,the unconspicuous gas signal become more weaker.This paper presents a theory of weak signal detaction achieved through a lock-in amplifier,combined with high-spead data processing capabilities and simulation on this system. The result shows that the syetem can inhibit the effects of noise well in the geology and production,the system also can restore, enhance, extract the useful weak gas signal. The experiment results show that new method can optimize the real-time line detection of weak gas signal.
出处
《煤矿机械》
北大核心
2012年第7期199-201,共3页
Coal Mine Machinery
