中低山区直升机重磁缓起伏测量方法研究

A study of the measurement method for gravity and magnetic slow fluctuation of helicopter in the medium-low mountainous area

通过对AS350-B3直升机进行改装,集成了适用于中低山区的航空重磁测量系统。设计坡度最大为3°的三维测网,将直升机重磁测量首次应用于中低山区。测量效果显示,缓起伏测量方法可以在三维空间很好地保持飞机航迹,还可以有效控制测线切割线交点高度差,从而使测线切割线形成一个网,对磁场调平起到有利作用。平飞测量与缓起伏测量效果的对比说明,缓起伏测量方法可以兼顾重、磁两种测量手段,成图效果较平飞异常特征更加明显。

By the modification of the AS350-B3 helicopter,the airborne gravity and magnetic measurement system suitable for the medium-low mountainous area is integrated.The 3 D measurement network with the maximum slope of 3°was designed,and the gravity and magnetic measurement method by helicopter was first applied in the medium-low mountainous area.The measurement results show that the slow rise and fall measurement method can keep the aircraft track well in the three-dimensional space,and can effectively control the height difference between the intersection points of the survey line and the cross line,so that the survey line and the cut line form a network,which plays a beneficial role in the magnetic field leveling.The comparison of the results of the horizontal flight measurement and the slow rise and fall measurement shows that the slow rise and fall measurement method can not only take into account both gravity and magnetic measurement methods,but also exert more obvious mapping effect than the horizontal flight anomaly characteristics.