一种具备干扰台站剔除的多台站定位方法

A Multi-station Positioning Method with Interference Elimination

在地震预警技术中震中的精确定位是一个难点问题,相较于仅利用单台P波记录进行震中定位,多台站地震定位具备更高的精度。然而,在多台定位中,存在由于某一台站误触发导致整体地震定位结果误差过大的问题。本文在基于网格搜索的多台定位基础上,利用Delaunay三角剖分对可能为干扰触发的台站进行剔除。通过实际天然地震定位对本文提出的方法进行验证,采用了Delaunay三角剖分可以有效剔除误触发多台站,在工程应用中有实际应用价值。

Accurate location of epicenter is a difficult problem in earthquake early-warning technology.Compared with single P wave record,multiple stations have higher accuracy.However,there is a problem of large error in overall seismic positioning results due to the mistrigger of one station.In this paper,based on grid search,Delaunay triangulation is used to eliminate stations that may be interference triggered.The method proposed in this paper is verified by the actual natural seismic positioning,and the Delaunay triangulation can be used to effectively eliminate multiple mis-triggered stations,which has practical application value in engineering applications.