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目前,在煤矿井下应用的动力载波系统一般以井下供电网作为信道的。由于这种信道结构复杂,分支线较多,所以作为高频通道时传输衰减较大;信道输入阻抗变化范围较大;工业干扰也较严重。这些缺点常常使载波系统不能合理的工作。严重时,甚至不能可靠的工作。欲提高动力载波系统的工作性能,对其信道进行高频改造是十分必要的。但是,由于井下条件的特殊性,使得这项工
At present, the power carrier system used in coal mines generally uses the underground power supply network as a channel. Because of this channel structure is complex, more branch lines, so as a high-frequency channel transmission attenuation greater; channel input impedance larger range; industrial interference is also more serious. These shortcomings often make the carrier system does not work properly. In serious cases, you can not even work reliably. To improve the working performance of the power carrier system, it is necessary to make high-frequency modification on the channel. However, due to the particularity of downhole conditions, this workmanship is made