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趋势分析法作为场分离的一种方法,当地形情况复杂、测区面积较大时,往往很难达到场分离的要求。文章通过改变多项式数学模型的阶次,选择最优的多项式数学模型进行趋势分析。通过对剖面趋势分析和曲面趋势分析的对比得知,在同一地质模型上剖面趋势分析效果较曲面趋势分析效果好,由此运用切割法将叠加异常数据直接截取,获得多个剖面进行趋势分析,再由剖面趋势分析得到曲面趋势分析。实验结果表明趋势分析效果理想,能达到场分离的要求。
As a method of field separation, trend analysis is often difficult to meet the requirements of field separation when the terrain situation is complex and the measurement area is large. By changing the order of the polynomial mathematical model, the article chooses the best polynomial mathematical model for trend analysis. Through the comparison of trend analysis and surface trend analysis, it is found that the effect of profile trend analysis is better than curve trend analysis in the same geological model. By using the cutting method, the superimposed anomaly data is directly intercepted to obtain the trend of multiple sections, Then by the trend analysis of the profile obtained surface trend analysis. The experimental results show that the trend analysis is effective and can meet the requirements of field separation.