测线分类在坑透反演成图中的应用

Application of Classified Probing Lines in Inverting Image with Tunnel Perspective

针对目前井下坑透时干扰因素较多而导致接收场强噪声大的问题,提出一种新的接收场强滤波方法。探索了测线长度分类在提高坑透反演成图质量中的应用。首先将工作面内发射-接收距离相同射线的接收场强数据经过分类划为一组,然后利用小波分析方法对各组测线的接收场强进行降噪处理,经过降噪处理的数据用来进行坑透反演成图。理论仿真和实际数据分析表明:基于测线分类的滤波方法能在一定程度上改善坑透反演成图的质量,较好地突出异常区的位置,对坑透反演成像有一定的指导意义。

Aiming for the issue of receiving field intensity with much noise,a novel method to filter the noise of receiving field intensity is proposed,and the technology of enhancing the imaging quality of radio electromagnetic wave tunnel perspective with classified probing lines is explored initially.Firstly,the received field intensity values of the same probing lines are classified as a group.Then the each group data is filtered with wavelet.Finally,the optimized data is used to invert the image of working plane.The attenuation formula of electromagnetic are established,and the background absorption coefficient and initial field intensity is solved by LM optimization algorithm.Theoretical analysis and experimental results indicate that the method could prompt the imaging quality to some extent,and the location of abnormal area could be enhanced.The proposed method is significant to guide the inverting and imaging of the working plane in the process of radio electromagnetic wave tunnel perspective.