基于矢量测量的在线载体磁补偿方法

doi:10.11720/wtyht.2023.1265

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Abstract

Aiming at the ill-conditioned coefficients in the traditional carrier magnetic compensation, this study investigated the main source of magnetic interference, simplified the original model by ignoring the influence of the eddy current field, and established a three-component magnetic compensation model. Accordingly, it proposed an online carrier magnetic compensation method for the magnetic field components. Compared with the traditional method, the method proposed in this study effectively improved the compensation accuracy by about 1.14 nT. This study conducted embedded hardware simulations of this method using the high-level synthesis (HLS) tool of the field programmable gate array (FPGA), verifying the real-time performance and magnetic compensation accuracy of this method in a hardware system.

Key words： magnetic interference HLS vector online compensation

Received: 26 May 2022 Published: 27 April 2023

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	Articles by authors
	Jie-Ya LING
	Huang-Huang JIN
	Zhi-Hong ZHUANG
	Hong-Bo WANG
	Sheng-Ya DONG

Cite this article:

Jie-Ya LING,Huang-Huang JIN,Zhi-Hong ZHUANG, et al. An online magnetic compensation method for carriers based on vector measurement[J]. Geophysical and Geochemical Exploration, 2023, 47(2): 401-409.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.1265 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I2/401

Schematic diagram of total field calibration flight

Standard deviations with and without geomagnetic gradients

Influence of geomagnetic gradient on the compensation result of traditional total field method

Influence of geomagnetic gradient on the compensation results of this method

Comparison of standard deviation and condition number

Comparison and simulation of the condition number between the method in this paper and the traditional model

Comparison and simulation of the compensation results between the method in this paper and the traditional model

Compensation coefficients calculated by traditional total field method

The method of this paper to solve the compensation coefficient of x component

Simulation comparison of attitude angle and three-component solution direction cosine compensation effect

Standard deviation of compensation results for direction cosine of three components and attitude angle

Comparison of the measured flight method and the compensation results of the traditional model

Comparison of standard deviation between HLS tool and Verilog language

Time consumption comparison of the HLS tool (a) and the Verilog language (b)

Resource consumption comparison of the HLS tool (a) and the Verilog language (b)

FPGA comparison between HLS tools and traditional Verilog language

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