便携式三分量磁场测量模块

doi:10.11720/wtyht.2022.1463

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Abstract

The high-precision magnetic field measurement module is mainly used in the scientific fields such as geology, geophysics, and national defense. However, the existing three-component magnetic field measurement module suffers poor portability (requiring a PC for data acquisition), large background noise, and short operating time. Therefore, this study developed a portable three-component magnetic field measurement module:a high-precision data measurement module and an Android control program. The test results show that the measurement module supports the interactive control using Android mobile phones and enjoys the advantages of low background noise (dynamic range>121dB@fs=1,000Hz), high clock synchronization precision (time drift±0.87 ms/day), long operating time (for one-week continuous work), and high scalability (supporting multiple fluxgate sensors).Portable three-component magnetic field mesurement module is portable,simpk and easy to use,suitable for field testing.

Key words： low power consumption low noise clock synchronization

Received: 20 August 2021 Published: 03 January 2023

ZTFLH:

P631

Corresponding Authors: YIN Yao-Tian E-mail: 3466604515@qq.com;yyt86@163.com

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	Articles by authors
	Xu WANG
	Kai CHEN
	Yong-Jian LU
	Yao-Tian YIN

Cite this article:

Xu WANG,Kai CHEN,Yong-Jian LU, et al. Portable three-component magnetic field measurement module[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1528-1533.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1463 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1528

Picture of MagDAS-03 component

参数	测量范围
-3dB带宽	DC~3k Hz
噪声	<4 pT/ $H z$ @1Hz
功耗	1140 mW(+65 mA@12V, -30 mA@-12V)
量程	±60~±1000 μT
线性度	15 ppm
体积	32(L)mm×32(W)mm×225(H)mm

Fluxgate sensor parameters of Mag-13

Hardwareblock diagram

Specification of ADS1282

Power supply topology structure of MagDAS-03

Time synchronization schematic

MCU program diagram

Soft main menu(a),status query(b) and setting interface(c)

Soft control menu(a),digital mode(b) and waveform mode(c)

Noisetime domain waveform

RMS of self-noise and dynamic range

Self-noisepower spectral density

MagDAS-03 power test

MagDAS-03 bandwidth test

Performance comparison between Spectramag-6 and MagDAS-03

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