Three-axis fluxgate aeromagnetic measurement system and correction and compensation method therefor

A measurement system and compensation method technology, applied in radio wave measurement system, measurement device, geophysical measurement and other directions, can solve the problem that the total field data of the three-axis fluxgate cannot be used directly, and achieve easy portability and field work, terrain Fewer influencing factors and the effect of reducing system noise

Active Publication Date: 2019-03-29
加泰科(深圳)科技有限公司
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Problems solved by technology

If the magnetic interference of the drone body and other systems is superimposed, the total field data of the three-axis fluxgate cannot be directly used in the geomagnetic effective mapping operation after the aeromagnetic survey

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  • Three-axis fluxgate aeromagnetic measurement system and correction and compensation method therefor
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  • Three-axis fluxgate aeromagnetic measurement system and correction and compensation method therefor

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Embodiment Construction

[0080] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0081] Figure 1-11 One embodiment of the invention is shown schematically.

[0082] The system includes two major functional parts, the vertical take-off and landing fixed-wing UAV and the aeromagnetic measurement system (Fig. 1). The aeromagnetic measurement system includes an analog three-axis fluxgate magnetometer, GPS antenna and receiver, nine-axis inertial measurement unit, data acquisition and correction compensation device, wireless or wired data real-time transmission module, data storage U disk and the installation of the above devices In the mission compartment of the vertical take-off and landing fixed-wing UAV, and the computer ground station system for calculating the correction compensation parameters and collecting and processing data.

[0083] The three-axis fluxgate magnetometer data acquisition and correction compensation algorithm and i...

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Abstract

The invention discloses a three-axis fluxgate aeromagnetic measurement system based on a vertical take-off and landing aircraft with fixed-wings, and a correction and compensation method therefor. Themethod comprises the steps of: pre-collecting a series of three-axis fluxgate digital output readings generated by the change of the attitude as a numerical input, solving a nonlinear least squares equation set to obtain 12 compensation parameters having a common influence on the three-axis fluxgate magnetometer; and storing the obtained compensation parameters into a multi-data synchronous acquisition and correction compensation system, and performing real-time and post-flight correction compensation on the vector magnetic field and the total field data obtained by the line-measurement of the aeromagnetic flight by using a compensation algorithm. According to the three-axis fluxgate aeromagnetic measurement system and the correction and compensation method therefor, the intensity data ofthe total magnetic field after being corrected is obtained without the need of the optical pump magnetometer, so the three-axis fluxgate aeromagnetic measurement system is suitable for light and small drone platforms. The magnetometer is integrated into the mission compartment of the drone, and the protection is in place, and the disassembly and assembly is convenient. The compensation algorithmused greatly improves the accuracy of the three-axis vector high-precision magnetometer and greatly reduces the noise of the system.

Description

technical field [0001] The present invention relates to an unmanned aerial vehicle geophysical detection technology, in particular to a magnetic exploration or detection technology field. Background technique [0002] At present, the main commercial magnetometers on the market include fluxgate magnetometer, proton magnetometer, Overhauser magnetometer, optical pump magnetometer and superconducting quantum interference magnetometer. Restricted by many factors such as detection principle, probe material, volume, weight, sampling rate, price, etc., commercial airborne magnetic survey is mainly based on optical pump magnetometer, supplemented by fluxgate magnetometer as compensation or three-component measurement. [0003] Airborne magnetic survey was first used by the navy to detect magnetic anomalies caused by submarines, and later used in civilian aerophysical surveys. In the field of physical exploration, aeromagnetic surveying has the characteristics of fast speed, high pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/40G01V3/38
CPCG01V3/38G01V3/40
Inventor 卿昊
Owner 加泰科(深圳)科技有限公司
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