基于相位差检测的煤岩混合物煤含量判别方法

摘要

In view of problems of long measuring time and big error existed in current coal content recognition methods of coal-rock mixture,a coal content recognition method of coal-rock mixture based on phase difference detection was proposed.Relationship between coal content of coal-rock mixture and capacitance was gotten through experiment,parameters of phase difference detection circuit were chosen reasonably,and relationship between phase difference and the coal content was analyzed through numerical simulation and circuit simulation.The results show that coal content is lower than the minimum coal content threshold of coal mining when phase difference is positive,and coal content is higher than the minimum coal content threshold of coal mining when phase difference is negative,which indicate whether coal content achieves the minimum coal content threshold of coal mining can be judged accurately through detecting positive or negative of phase difference.%针对现有煤岩混合物煤含量判别方法存在测量时间长、误差大等问题,提出了一种基于相位差检测的煤岩混合物煤含量判别方法.通过实验得到了煤岩混合物煤含量与电容之间的关系,进而合理选取相位差检测电路各参数,通过数值模拟和电路仿真分析相位差和煤含量之间的关系.结果表明,相位差为正时,煤含量低于煤炭可开采的最低煤含量阈值,相位差为负时,煤含量高于煤炭可开采的最低煤含量阈值,通过检测相位差正负能准确地判断煤含量是否达到煤炭可开采的最低煤含量阈值要求.