Magnetic Noise Prediction and Evaluation in Tunneling Magnetoresistance Sensors

Chęciński, Jakub; Wiśniowski, P.; Frankowski, Marek; Stobiecki, T.

doi:10.3390/s18093055

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…There is thermoelectric noise, scattershot noise, random telegraph noise, and electrical 1/F noise, which are common in general electronic devices in magnetoresistance units. There are also magnetically related thermomagnetic noise and magnetic 1/F noise [53][54][55].…”

Section: Accuracymentioning

confidence: 99%

Research Progress of Current Sensor Based on Spin-Dependent Magnetoresistance Effect

Zhou

Li²,

Pan³

et al. 2023

J. Phys.: Conf. Ser.

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This article reviews the physical mechanism of spin-dependent magnetoresistance and its early application in sensors. The magnetic field performance generated by the current to be measured is explained. According to the realization of the magnetoresistance measurement of this characteristic, seven main indicators of the current sensor are summarized. Starting with the structure of magnetoresistance devices and magnetoresistance units of current sensors based on spin-dependent magnetoresistance effect, several design methods of sensors and their advantages and disadvantages are analyzed. Starting from the role of AMR, GMR and TMR in magnetoresistance cells, the structure of series and parallel arrays, permanent magnet bias, coil bias, coil reset, flux aggregator and superconducting ring are analyzed, and several design methods of sensors are summarized as well as their advantages and disadvantages. Finally, the possible development direction of the current sensor is forecasted based on the recently discovered spin correlation effect.

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Section: Accuracymentioning

confidence: 99%

Research Progress of Current Sensor Based on Spin-Dependent Magnetoresistance Effect

Zhou

Li²,

Pan³

et al. 2023

J. Phys.: Conf. Ser.

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“…They put forward some practical control algorithms, but most of the research is aimed at the harmonic runout of the sensor. However, harmonic runout is only one type of sensor runout in practical maglev rotor systems (Li et al, 2022a), and for other types of sensor runout (such as broadband noise runout and high-frequency pulse runout) (Checinski et al, 2018; Xu et al, 2021) effect on the AMB-rotor system and the corresponding control method remains to be studied. Therefore, given the above problems, this paper analyzes the causes of broadband noise, high-frequency pulse, and harmonic runout and their influence on the AMB-rotor system and puts forward the corresponding control method for the rotor vibration caused by different types of sensor runout.…”

Section: Introductionmentioning

confidence: 99%

Influence of displacement sensor runout on active magnetic bearing-rotor system and control analysis

Jian

Cheng

2023

Journal of Vibration and Control

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In the active magnetic bearing (AMB)-rotor system, a displacement sensor is one of the indispensable components. It detects the displacement of the rotor in real time and feeds back to the control system to realize the stable suspension of the rotor. However, due to electromagnetic interference, unstable power supply, poor grounding, and uneven rotor surface, the signal runout of the displacement sensor can often occur, resulting in rotor vibration. Given the above problems, this paper establishes the control model of the AMB-rotor system, lists three typical sensor runout signals, then analyzes the influence of different types of sensor runout on the system, and discusses the control methods under different sensor runout conditions. The research results have a specific guiding significance for vibration control of the maglev rotor under sensor runout influence.

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“…Nevertheless, the new developed magnetic sensors like tunnelling magnetoresistance (TMR) have been emerging in more applications due to its high sensitivity. TMR is the fourth generation of magnetoresistive made of an Fe/MgO/Fe-type magnetic MTJ [14]. Because of this MJT, TMR can achieve more than 200% of magnetoresistance variation at room temperature as compared to AMR and GMR where only 25% and 70% of magnetoresistance relative are achieved, respectively [15].…”

Section: Introductionmentioning

confidence: 99%

Tunnel-magnetoresistive-based Pulsed Eddy Current Probe for Inspection of Corrosion under Insulation

Mohamed

Sophian

Sulaiman

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The problem of corrosion in the industrial oil and gas pipes has been one of the major contributors in catastrophic structural failures. Among the various types of corrosion, corrosion under insulation (CUI) has been known to cause serious problems. Pulsed eddy current (PEC) non-destructive testing has shown its effectiveness in detecting hidden CUI. Most PEC systems have been developed by using an inductive coil as their sensing device, while some use a magnetic sensor which potentially offers better resolution. A new probe design based on a solid-state Tunnel magnetoresistance (TMR) is presented. TMR sensors offer higher sensitivities compared to other commercially available sensors. The performance of the probe is evaluated by using ferromagnetic mild steel plates that have thicknesses in the range of 8mm to 12mm at different stand-offs with a thin aluminium sheet under the probe. The different thicknesses represent different corrosion levels, while the stand-offs and thin aluminium sheet are to mimic the insulation of different thicknesses and the cladding in the real pipeline structure. The results show an overall mean absolute error (MAE) of 0.19 mm, which is better than our existing Hall-device-based PEC probe.

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Magnetic Noise Prediction and Evaluation in Tunneling Magnetoresistance Sensors

Cited by 5 publications

References 16 publications

Research Progress of Current Sensor Based on Spin-Dependent Magnetoresistance Effect

Research Progress of Current Sensor Based on Spin-Dependent Magnetoresistance Effect

Influence of displacement sensor runout on active magnetic bearing-rotor system and control analysis

Tunnel-magnetoresistive-based Pulsed Eddy Current Probe for Inspection of Corrosion under Insulation

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