应用窄脉冲测试煤的电参数

测量物质的物性参数已有很多种方法。关于煤的电参数的测量,也有一些文章论述过,但这些方法大都要对煤进行采样加工,然后在实验室进行测量。这里介绍的窄脉冲法是实地测量,不需对煤进行加工处理。

MEASUREMENT OF ELECTRIC PARAMETERS OFCOAL BY USING A NARROW PULSE

The paper describes the method equipment and results in measuring the electric parameters of coal by a narrow pulse. It is a technique of time domain measurement with a numbr of advantages. Various properties of a matter over a broad frequency band can be measured simultaneously. It can be used for on situ determination of the properties of a material.The results obtained with different methods are basically in agreement and are proved useful in estimating properties of coal.It is observed in the experiment that the high frequency components of a pulse attenuate rapidly in coal, but the frequency components below 40 MHzcan penetrate very thick coal layer.