A New Calibration Method for Triaxial Fluxgate Magnetometer Based on Magnetic Shielding Room

Pan, Donghua; Li, Ji; Jin, Chongyu; Liu, Tianhao; Lin, Shengxin; Li, Liyi

doi:10.1109/tie.2019.2914574

Cited by 40 publications

(24 citation statements)

References 20 publications

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“…For long-term comparative observations, there is usually an optimum data length for optimal correction. For instruments' comparative testing, unlike linearity, frequency response, or other laboratory metrics [14,15], a pair of instruments needs to be placed in the natural geomagnetic field environment and observed for as long as possible to fully reflect the effects of temperature and time drift and to perform a series of relevant calibrations [16,17]. Since the test phase is always terminated by the actual observation mission, the test time will not last indefinitely apparently.…”

Section: Characteristics Of the Relative Temperature Coefficientmentioning

confidence: 99%

Characterization of the Effects of Temperature and Instrument Drift in Long-Term Comparative Geomagnetic Vector Observations

Teng

et al. 2022

Atmosphere

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In order to minimize interruptions to recording, geomagnetic observatories usually use a back-up instrument operating simultaneously with the primary instrument in order to obtain comparative observations. Based on the correction parameter calculation method established in the previous work, we focused on the effects of temperature and instrument drift on the comparative geomagnetic vector observations. The linear influence of temperature on the comparative data was shown to be variable. The relative temperature coefficient changed around the temperature inflection point and showed a V-type distribution in a scatter plot. This conclusion was verified in laboratory experiments. The long-term time drift between the comparative instruments exhibits a linear pattern, and the fitness of the correction model can be evaluated by the degree to which the residual distribution of the fitted straight line conforms to the normal distribution. However, the absolute value of the long-term time drift between variometers with the same type of probe is very small. Therefore, long-term time drift correction should be carried out with care. The associated analysis and conclusions have the potential to benefit data agreement correction of long-term comparative geomagnetic vector observations and comparative testing of the performance of vector instruments.

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Section: Characteristics Of the Relative Temperature Coefficientmentioning

confidence: 99%

Characterization of the Effects of Temperature and Instrument Drift in Long-Term Comparative Geomagnetic Vector Observations

Teng

et al. 2022

Atmosphere

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“…Pan et al provided a new calibration method for triaxial fluxgate magnetometers (TFMs) which combines a magnetic shielding room (MSR) and a triaxial uniform magnetic field coil (TUMC) [ 42 ]. As described above, the TFM has three intrinsic errors.…”

Section: Basic Researchmentioning

confidence: 99%

“…Finally, experiments are performed and it is proved that this calibration method has high sensitivity and accuracy. The schematic diagram and the experimental picture of this method is shown in Figure 6 and Figure 7 , respectively [ 42 ].…”

Section: Basic Researchmentioning

confidence: 99%

Recent Progress of Fluxgate Magnetic Sensors: Basic Research and Application

Wei

Liao

Zhang

et al. 2021

Sensors

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Fluxgate magnetic sensors are especially important in detecting weak magnetic fields. The mechanism of a fluxgate magnetic sensor is based on Faraday’s law of electromagnetic induction. The structure of a fluxgate magnetic sensor mainly consists of excitation windings, core and sensing windings, similar to the structure of a transformer. To date, they have been applied to many fields such as geophysics and astro-observations, wearable electronic devices and non-destructive testing. In this review, we report the recent progress in both the basic research and applications of fluxgate magnetic sensors, especially in the past two years. Regarding the basic research, we focus on the progress in lowering the noise, better calibration methods and increasing the sensitivity. Concerning applications, we introduce recent work about fluxgate magnetometers on spacecraft, unmanned aerial vehicles, wearable electronic devices and defect detection in coiled tubing. Based on the above work, we hope that we can have a clearer prospect about the future research direction of fluxgate magnetic sensor.

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“…In the same year, Janosek et al proposed a calibration method for DC precision magnetic sensors with interference compensation in a weak magnetic environment, which improved the environmental adaptability of the sensors and achieved good calibration results in a laboratory environment with significant magnetic interference [11]. In 2020, Pan et al proposed a method to correct sensor errors using a magnetically shielded chamber and a triaxial Helmholtz coil, which was achieved by modeling sensor errors as well as environmental noise, using a magnetically shielded chamber to provide a near-zero magnetic environment, and using a triaxial coil to provide a controlled vector magnetic field [12].…”

Section: Introductionmentioning

confidence: 99%

Design of A Three-axis Helmholtz Coil for Magnetic Sensor Calibration

Zhang¹,

Li²

2023

AJST

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Accurate measurement of magnetic sensor components is always an important issue in magnetic field applications, but there are unavoidable errors in the sensor system that need to be corrected before use. The common scalar correction method is difficult to effectively correct the sensor component because it requires a uniform and stable background magnetic field and depends on the magnetic field modulus. Therefore, a set of triaxial Helmholtz coils that can be used for sensor vector correction is designed to generate a controlled standard magnetic field. The design index of the coils, the size of the uniform zone, and the relationship between the magnetic field and the current were analyzed to provide a basis for the effective calibration of the sensor components. The measurement results show that the size of the uniform zone and the accuracy of the magnetic field of the coils designed in this paper meet the design requirements. Meanwhile, by using the coils in the calibration of the sensor array and the positioning of the magnetic target, the sensor error is reduced by three orders of magnitude, and the positioning accuracy of the magnetic target reaches 0.1 m with good practical effect.

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A New Calibration Method for Triaxial Fluxgate Magnetometer Based on Magnetic Shielding Room

Cited by 40 publications

References 20 publications

Characterization of the Effects of Temperature and Instrument Drift in Long-Term Comparative Geomagnetic Vector Observations

Characterization of the Effects of Temperature and Instrument Drift in Long-Term Comparative Geomagnetic Vector Observations

Recent Progress of Fluxgate Magnetic Sensors: Basic Research and Application

Design of A Three-axis Helmholtz Coil for Magnetic Sensor Calibration

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