Calibration and Distortion Field Compensation of Gradiometer and the Improvement in Object Remote Sensing

Hu, Xiangchao; Pang, Hongfeng; Fu, Liangrui; Chen, Dixiang; Pan, Mengchun

doi:10.1051/matecconf/20165901004

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…The two-axis [65][66][67] and three-axis fluxgate sensors [68,69] were developed differently depending on the axis they were used on the application.…”

Section: Advancements In Conventional Fluxgate Sensormentioning

confidence: 99%

Fabrication Advancements in Integrated Fluxgate Sensors: A Mini Review

2022

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Research on magnetic sensors has been carried out in recent years to enhance sensing capability, enabling us to understand the Earth's magnetic field changes [1] with better sensitivities of 10 À10 to 10 À2 T. [2] Magnetic field sensors have been extensively investigated according to their operating principles and actions in various applications. Sensitivity and selectivity are the two essential properties crucial in the evolution of magnetic field sensors to achieve high fidelity outputs. The former is strengthened by increasing the sensor area and improvements to the planar surface with various Nano-materials. In contrast, the latter is improved by using multiple materials and techniques to enhance interfacial interactions.Magnetic sensors detect disturbances and changes in magnetic fields such as force, direction, and flux. It is a transducer that converts a magnetic field into an electrical voltage. There are several types of magnetic field sensors, each with its own sensitivity range. In addition to sensitivity, the temperature range, the physical size of the sensor, and its on-chip manufacturability must all be considered. Magnetic fields of less than 100 pT are extremely weak and far below the earth's magnetic field. Earth magnetic field sensors have a sensitivity range of 10 μT to a few micro-Tesla, while bias magnet field (high field) sensors have a sensitivity of more than 1 mT.Magnetic fields of less than 100 pT are extremely weak and far below the earth's magnetic field. Earth magnetic field sensors have a sensitivity range of 10 μT to a few micro-Tesla, while bias magnet field (high field) sensors have a sensitivity of more than 1 mT. The most sensitive low-field sensor is the superconducting quantum interference device (SQUID). It is based on Brian J. Josephson's research on a point-contact connection for measuring extremely low currents.The SQUID ring, the radio-frequency coil, and the big antenna loop are all superconducting components of the SQUID sensor. All three must be cooled to the point where they become superconducting. The SQUID itself is small, but the requirement for liquid helium cooling makes the entire apparatus big and hefty. Magnetoresistive sensors (MR) have a high sensitivity, are inexpensive to manufacture, and are small in size. However, they have poor noise performance and linearity, as well as a small dynamic range, making them unappealing and unsuitable for many low-noise applications. Furthermore, as the power usage is reduced, their sensitivity degrades.Search-coil or induction sensors are high-sensitivity, lowpower sensors, but their sensitivity decreases as the cross-section area decreases, making miniaturization ineffective. Because search coils can detect an alternating current magnetic field, they cannot detect a static magnetic field like the Earth's magnetic field. Magnetic sensors based on semiconductors, such as Hall-Effect sensors, magnetotransistors, and magnetodiodes, are very small in size. Because of its low manufacturing cost

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“…The two-axis [65][66][67] and three-axis fluxgate sensors [68,69] were developed differently depending on the axis they were used on the application.…”

Section: Advancements In Conventional Fluxgate Sensormentioning

confidence: 99%

Fabrication Advancements in Integrated Fluxgate Sensors: A Mini Review

2022

View full text Add to dashboard Cite

show abstract

“…It can detect magnetic anomalies by measuring the spatial change rates of the three components of a magnetic field along the orthogonal coordinate system and has been widely applied in the fields of aviation geophysical exploration [1][2][3][4], magnetic dipole localization [5][6][7][8][9][10], geophysical surveys [11][12][13], biomagnetic [14][15][16], underwater unmanned aerial vehicle navigation, and geomagnetic navigation [17][18][19][20][21][22]. To achieve high sensitivity detection of weak magnetic targets, it is necessary to improve its data quality [23]. However, the quality can be affected by factors such as interference, unsatisfactory performance of the sensors, and installation of the sensor array.…”

Section: Introductionmentioning

confidence: 99%

Correction of Three Sensors in a Magnetic Field Gradiometer

Xiao

Tang

et al. 2022

Journal of Sensors

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A magnetic sensor array is usually used for weak magnetic target detection. This paper presents a vector second-order gradiometer that is arranged in a vertical structure. The measurement accuracy of the gradiometer is affected by the error of each three-axis magnetometer (TAM) and the misalignment error between TAMs. By analyzing the error mechanism of the magnetic gradiometer test system, the corresponding error model for the correction of the gradient of the component is established. The error parameters of the gradiometer were estimated by the proposed method, and the gradient error of the magnetic field and the component gradient error of the magnetic field were corrected. After correction, the gradiometer is used to localize the magnetic target. Simulation results illustrate that the localization error of magnetic targets is reduced by two orders. Thus, this proposed correction method can effectively improve the locating performance of gradiometer.

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Hybrid Calibration Method for Three-Axis Gradiometer

Yang

Yan

2017

IEEE Magn. Lett.

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Calibration and Distortion Field Compensation of Gradiometer and the Improvement in Object Remote Sensing

Cited by 3 publications

References 10 publications

Fabrication Advancements in Integrated Fluxgate Sensors: A Mini Review

Fabrication Advancements in Integrated Fluxgate Sensors: A Mini Review

Correction of Three Sensors in a Magnetic Field Gradiometer

Hybrid Calibration Method for Three-Axis Gradiometer

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