基于DSP的微弱瓦斯信号检测的研究

为了更好地检测微弱瓦斯信号,在滤波的技术手段上加以改进,基于微弱信号的锁相放大检测原理,提出模拟电路滤波与数字滤波技术相结合的方法进行滤波.具体方法是采用相敏检波原理做前期滤波,再利用数字滤波器DSP的高速处理数据能力,通过具体的算法进行后期低通滤波.结果表明,该检测方法能实现更充分的滤波、甲烷气体浓度的实时检测,并达到测量的高稳定性和高灵敏度,使煤矿安全生产中的瓦斯事故得到很好的预防.

Research on detection of gas weak signal based on DSP

In order to have a better detection of the weak gas signal and Improve the detection based on the filtration technology,the paper provided the combined method with the simulated circuit filtration and the digital filtration technology for the filtration based on the lock phase amplified detection principle of the weak signal.The certain method was to apply the phase sensitive wave detection principle for the preliminary filtration and then the digital wave filter was applied for the late low filtration wave...