中低山区直升机重磁缓起伏测量方法研究

doi:10.11720/wtyht.2021.0090

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Abstract

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 3D 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.

Key words： medium-low mountainous area gravity and magnetic measurement method by helicopter slow rise and fall measurement method 3D measurement network

Received: 23 February 2021 Published: 15 December 2021

ZTFLH:

P631

Corresponding Authors: AN Zhan-Feng E-mail: gengshengboy@163.com;anzhanfeng@ags.gov.cn

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	Articles by authors
	Sheng-Bo GENG
	Hong-Yu YAN
	Zhan-Feng AN
	Hai-Jing GUAN
	Zhi-Bo WANG
	Jiu-Qiang JIN
	Ming XUN
	Xin WANG
	Bing LI
	Qi GUO

Cite this article:

Sheng-Bo GENG,Hong-Yu YAN,Zhan-Feng AN, et al. A study of the measurement method for gravity and magnetic slow fluctuation of helicopter in the medium-low mountainous area[J]. Geophysical and Geochemical Exploration, 2021, 45(5): 1248-1255.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.0090 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I5/1248

Geological map of survey area

Parameters of the main airborne geophysical flying-platforms

Variation of magnetic interference field

The weight of the aero gravity and magnetic measurement system

Aero gravity and magnetic measuring system installation diagram

Aero gravity and magnetic measurement system

Static Testing result of aero gravity and magnetic measurement system

Dynamic testing result aero gravity and magnetic measurement system

2 D plane survey grid navigation diagram

3 D plane survey grid navigation diagram

3D plane survey grid diagram(“—.—” is DEM data)

Design survey line diagram

Terrain(up)and flight path(down)

Height difference statistics of flight path and design survey line

The height difference statistics between the intersection points of the survey line and the cross line

Horizontal flight aero magnetic ΔT shadow diagram(left) and slow rise and fall flight aero magnetic ΔT shadow diagram (rigth)

Horizontal flight aero space gravity shadow diagram (left) and slow rise and fall flight aero space gravity shadow diagram (rigth)

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