摘要
现代煤矿中的高次谐波和电磁脉冲,会干扰监控系统对瓦斯信号的检测.电磁干扰滤波器能有效地抑制干扰,但无源元件的高频寄生参数严重影响了其抑制干扰的能力,需予以消除.分析电缆对瓦斯信号的干扰、寄生参数变化对滤波器性能的影响以及滤波器寄生参数的抑制措施;通过对电磁耦合的分析、电路的仿真与计算,验证滤波器对干扰的实际抑制效果.实现矿井滤波设备的集成、成本的降低,有效减小电磁干扰对瓦斯信号的影响.避免因干扰产生的高值断电、信号误动作、通讯中断等造成的矿井安全隐患.
The high-order harmonic electromagnetic pulse interference influences monitoring system to detect gas signal in modern coal mines. EMI filters can effectively suppress conducted interference, but the high-frequency parasitic parameters of the passive components have a serious impact on their ability to suppress interference. The parasitic parameters need to be cancelled. We analyze interferences of cable on gas signal, influences of the parasitic parameter changes on the performance of filters, and discuss filter parasitic cancellations. It proves the effect of multiple parasitic cancellations integration through the a- nalysis of electromagnetic coupling, circuit simulation and calculation. It is conducive to realize the mine filtering device integra- tion and cost reduction, to reduce electromagnetic interference on the gas signal transmission, and avoid to affect mine produc tion safety because of power outages, communications interruption caused by electromagnetic interference.
出处
《河南师范大学学报（自然科学版）》
CAS
北大核心
2013年第4期50-54,共5页
Journal of Henan Normal University(Natural Science Edition)
