Designing a Spintronic Based Magnetoresistive Bridge Sensor for Current Measurement and Low Field Sensing

Musuroi, Cristian; Volmer, Marius; Oproiu, Mihai; Neamtu, J.; Helerea, Elena

doi:10.3390/electronics11233888

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…Another solution is using magnetoresistive sensors as a bridge circuit [11]. The advantages of this solution are the simplicity of design and high measurement accuracy.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of the speed of a microprocessor relay protection device of open architecture with a reed switch and the industrial internet of things

Neftissov

Sarinova

Kazambaev

et al. 2023

EEJET

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The paper presents the development of a microprocessor-based relay protection device on open architecture. Currently, there is a problem with modern microprocessor relay protection: the impossibility to replace the damaged element with alternatives from other manufacturers. The solution to this problem is the use of devices with open architecture. The study developed a structural model of a microprocessor-based relay protection device based on an open architecture with the industrial Internet of things application. Open architecture is achieved through open protocols and the principle of modularity. The industrial Internet of things technology transfers the control action of triggering blocking. A microprocessor-based relay protection device prototype based on an open architecture was developed. The simulation of the developed device was conducted. The appearance of higher harmonics and aperiodic components in the short-circuit current was not considered during modeling. Due to the study's limitations in the form of lack of load, current and voltage sensors, such as Hall sensors, and inductance coils, the subject of this study is only the speed of operation. A high multiplicity current generation setup was assembled for experimental testing. The developed relay protection device on an open architecture trips faster than the traditional solution. The application of the Internet of Things allowed it to ensure the blocking of non-selective tripping. The obtained results are provided by structural simplification compared to traditional solutions and speed of information transfer with the application of the Internet of things. The developed open architecture device with the industrial Internet of things technology application gives new possibilities for relay protection systems, including flexibility to meet the requirements in connection with the introduction of distributed power

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“…Another solution is using magnetoresistive sensors as a bridge circuit [11]. The advantages of this solution are the simplicity of design and high measurement accuracy.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of the speed of a microprocessor relay protection device of open architecture with a reed switch and the industrial internet of things

Neftissov

Sarinova

Kazambaev

et al. 2023

EEJET

View full text Add to dashboard Cite

show abstract

“…Measurement of the electric current is a key element in electrical systems. Current measurement can be achieved with various principles, including contacting type, sensing resistor and non-contacting type, Rogowski coil [1], Hall effect [2] and magnetoresistivity [3]. Due to the isolated design of the power analyzer at the digital signal transmission, the current-sensing stage does not need to be galvanic isolated.…”

Section: Introductionmentioning

confidence: 99%

Current-Sensing Topology with Multi Resistors in Parallel and Its Protection Circuit

et al. 2023

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Current-sensing topology with multi resistors in series has limitations in improving the dynamic range of current acquisition, so a sensing topology with multi resistors in parallel is proposed. The overcurrent state of a parallel shunt circuit cannot be latched, resulting in protection hiccups. A dual threshold-detection circuit is designed to achieve protection state latching and self-recovery. The rectified mean circuit is applied for overcurrent magnitude detection and its validity is proved. But the delay and ripple of the output waveform of the rectified mean circuit may also cause protection hiccups. Combining Fourier series representation, Fourier transform and inverse transform, the time domain expressions of the output of the rectified mean circuit for three common waveforms are obtained. Furthermore, the estimation formulas for the residual ripple amplitude of the three waveforms are derived. In an experiment, the protection hiccup issue in parallel sensing topology was eliminated, while the time constants and hysteresis ratios of the protection circuits were properly set according to theoretical calculation results. With five parallel sensing resistors, the ratio of the maximum to minimum range of the single current channel reaches 1.28×104, which is higher than counterparts with multiple series sensing resistors. The advantages of parallel sensing topology in improving dynamic range are confirmed.

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Optimized PVA-(ZnO)x-(PANI)1−x nanocomposites: characterization and humidity sensing application

Elkatlawy,

Elzwawy,

Sakr

et al. 2024

J Mater Sci: Mater Electron

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This work presents an effort to study the potential of ternary PVA/ZnO/PANI nanocomposite for humidity sensing applications. Easily-peeled-off films of the ternary system were formed by the solution casting method and characterized. FTIR manifested the uniformity of the synthesized films and the existence of both polyaniline and ZnO functional groups in the relevant PVA host matrix. Characteristic absorption bands of PVA were overlapped with some characteristic bands of polyaniline. XRD patterns show the typical semicrystalline peak for the pristine PVA. The XRD analysis did not demonstrate any crystalline peaks for ZnO due to the capping-off effect of the PVA macromolecule. Energy dispersive X-ray mapping analysis and SEM micrographs manifested a homogeneous distribution of ZnO and PANI particles and a smooth yet dense film appearance. A study of electronic transitions and band gap displayed that the value of the band gap varies based on component concentration with the lowest value for the film of equal concentration of both ZnO and polyaniline. The humidity sensing behavior of the films was explored at different frequencies. The most variation in impedance was reached at 500 Hz, while the impedance variation at 50 Hz is the best from the performance point of view, where the relation between the impedance and relative humidity is linear. Samples F3 [PVA (ZnO)0.7(PANI)0.3], and F4 [PVA (ZnO)0.5(PANI)0.5] revealed the highest sensitivity among other tested samples. The measured hysteresis for the F3 and F4 samples were 1.38E + 05 MΩ/RH and 1.55E + 05 MΩ/RH, respectively. Impedance and complex impedance spectroscopy measurements confirmed that the film F3 revealed the highest sensitivity among the other tested samples. The proposed structure of the sensor can be employed for real-life applications since it can be easily coupled with electronic read devices and its overall functionality.

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Designing a Spintronic Based Magnetoresistive Bridge Sensor for Current Measurement and Low Field Sensing

Cited by 3 publications

References 37 publications

Determination of the speed of a microprocessor relay protection device of open architecture with a reed switch and the industrial internet of things

Determination of the speed of a microprocessor relay protection device of open architecture with a reed switch and the industrial internet of things

Current-Sensing Topology with Multi Resistors in Parallel and Its Protection Circuit

Optimized PVA-(ZnO)x-(PANI)1−x nanocomposites: characterization and humidity sensing application

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