scholarly journals Magnetoelectric Vortex Magnetic Field Sensors Based on the Metglas/PZT Laminates

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2810
Author(s):  
Do Thi Huong Giang ◽  
Ho Anh Tam ◽  
Vu Thi Ngoc Khanh ◽  
Nguyen Trong Vinh ◽  
Phung Anh Tuan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Flux Distribution ◽  
Volume Fraction ◽  
Magnetic Sensors ◽  
Current Sensor ◽  
Vortex Center ◽  
Magnetic Field Sensors ◽  
Ring Shape ◽  
Voltage Signal ◽  
New Generation

This paper describes the route, from simulations toward experiments, for optimizing the magnetoelectric (ME) geometries for vortex magnetic field sensors. The research is performed on the base of the Metglas/Piezoelectric (PZT) laminates in both open and closed magnetic circuit (OMC and CMC) geometries with different widths (W), lengths (L), and diameters (D). Among these geometries, the CMC laminates demonstrate advantages not only in their magnetic flux distribution, but also in their sensitivity and in their independence of the position of the vortex center. In addition, the ME voltage signal is found to be enhanced by increasing the magnetostrictive volume fraction. Optimal issues are incorporated to realize a CMC-based ME double sandwich current sensor in the ring shape with D × W = 6 mm × 1.5 mm and four layers of Metglas. At the resonant frequency of 174.4 kHz, this sensor exhibits the record sensitivity of 5.426 V/A as compared to variety of devices such as the CMC ME sensor family, fluxgate, magnetoresistive, and Hall-effect-based devices. It opens a potential to commercialize a new generation of ME-based current and (or) vortex magnetic sensors.

Compact Design of a Wide Bandwidth High Current Sensor Using Tilted Magnetic Field Sensors

2021 ◽  
Author(s):  
Philipp Ziegler ◽  
Yiru Zhao ◽  
Jorg Haarer ◽  
Johannes Ruthardt ◽  
Manuel Fischer ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Current Sensor ◽  
High Current ◽  
Wide Bandwidth ◽  
Magnetic Field Sensors ◽  
Compact Design ◽  
Tilted Magnetic Field

Dipole Positioning Recognition Using Neural Networks

2014 ◽  
Vol 605 ◽  
pp. 673-676
Author(s):  
Katerina Skouta
Keyword(s):  
Magnetic Field ◽  
Neural Networks ◽  
Magnetic Sensors ◽  
Sufficient Information ◽  
Naval Vessel ◽  
Magnetic Field Sensors ◽  
Single Dipole ◽  
Exact Position ◽  
Magnetic Mass ◽  
Measured Magnetic Field

A ships position could be detected by its magnetic signature. A crucial issue, regarding this approach for naval vessel monitoring, is the difficulty in defining the appropriate number of magnetic sensors needed and their respective configuration, in order to predict accurately the position of the magnetic mass through the measured magnetic field intensities on a specific boundary. In the present paper, this problem is dealt downscaled at tracing the exact position and orientation of a single dipole. In particular, Neural Networks, properly calibrated, are implemented as a method for the detection of the position and the orientation of a dipole through the measured magnetic field inducted. The results indicate that measurements of two magnetic field sensors at the boundary could provide sufficient information about the dipoles position, with a certainty of 99%.

A Novel Closed Loop Current Sensor Based on a Circular Array of Magnetic Field Sensors

2019 ◽  
Vol 19 (7) ◽  
pp. 2517-2524 ◽  
Author(s):  
Roland Weiss ◽  
Alexander Itzke ◽  
Julian ReitenspieB ◽  
Ingolf Hoffmann ◽  
Robert Weigel
Keyword(s):  
Magnetic Field ◽  
Closed Loop ◽  
Current Sensor ◽  
Loop Current ◽  
Circular Array ◽  
Magnetic Field Sensors

Hybrid Fiber-Optic Current Sensor Using Two Faraday Glass-Slab Magnetic Field Sensors

2004 ◽  
Vol 43 (5A) ◽  
pp. 2737-2741 ◽  
Author(s):  
Choong Soo Lim ◽  
Kijang Oh ◽  
Dalwoo Kim ◽  
Kyuman Cho
Keyword(s):  
Magnetic Field ◽  
Fiber Optic ◽  
Current Sensor ◽  
Hybrid Fiber ◽  
Magnetic Field Sensors ◽  
Glass Slab

FBG-Galfenol Integrated Magnetic Field Sensors for Harsh Environments

2016 ◽  
Vol 101 ◽  
pp. 9-14 ◽  
Author(s):  
Valerio Apicella ◽  
Michele Arturo Caponero ◽  
Cesidio Cianfarani ◽  
Daniele Davino ◽  
Andrea Polimadei ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Reconstruction Error ◽  
Magnetic Sensors ◽  
Active Materials ◽  
Field Range ◽  
Magnetic Field Sensors ◽  
Demagnetizing Field ◽  
Analysis And Design ◽  
Clamping System ◽  
Magnetic Hardening

The paper aims to discuss the basic issues related to the analysis and design of magnetic sensors based on the employment of magneto-active materials. In particular, the basic idea is based on the integration of a Galfenol magnetostrictive alloy to a Fiber Bragg Grating (FBG) embedded into an optic fiber, able to sense the deformation of the material induced by magnetic field. The structure of the alloy and the characteristics of the fiber, make the device suitable to work also in harsh envi- ronments. One of the basic goals is to provide a sensor as simple as possible, with high field range detection and, at the same time, low reconstruction error. It has been observed that the increase of the field range could be achieved by exploiting the effects of the demagnetizing field, without exploit- ing the well-known magnetic hardening induced by the applied stress. In fact, the latter requires a clamping system, resulting in the increase of the sensor size. The demagnetizing field, conversely, provides a shielding of the external field, turning away the undesired approach to saturation. Finally, the employment of a material characterized by weak hysteresis phenomena avoids the use of complex compensation algorithm without losing accuracy. Some result of its characteristics and performances are provided.

scholarly journals High Accuracy Open-Type Current Sensor with a Differential Planar Hall Resistive Sensor

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2231 ◽  
Author(s):  
Sungho Lee ◽  
Sungmin Hong ◽  
Wonki Park ◽  
Wonhyo Kim ◽  
Jaehoon Lee ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Integrated Circuit ◽  
High Accuracy ◽  
Magnetic Sensors ◽  
Oxide Semiconductor ◽  
Current Sensor ◽  
Cmos Process ◽  
Open Type ◽  
Differential Structure ◽  
A Current

In this paper, we propose a high accuracy open-type current sensor with a differential Planar Hall Resistive (PHR) sensor. Conventional open-type current sensors with magnetic sensors are usually vulnerable to interference from an external magnetic field. To reduce the effect of an unintended magnetic field, the proposed design uses a differential structure with PHR. The differential structure provides robust performance to unwanted magnetic flux and increased magnetic sensitivity. In addition, instead of conventional Hall sensors with a magnetic concentrator, a newly developed PHR with high sensitivity is employed to sense horizontal magnetic fields. The PHR sensor and read-out integrated circuit (IC) are integrated through a post-Complementary metal-oxide-semiconductor (CMOS) process using multi-chip packaging. The current sensor is designed to measure a 1 A current level. The measured performance of the designed current sensor has a 16 kHz bandwidth and a current nonlinearity of under ±0.5%.

Magnetic Emission Mapping for Passive Integrated Components Characterisation

2003 ◽  
Author(s):  
O. Crépel ◽  
Y. Bouttement ◽  
P. Descamps ◽  
C. Goupil ◽  
P. Perdu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Mobile Phone ◽  
Printed Circuit Board ◽  
Magnetic Sensors ◽  
Circuit Board ◽  
Magnetic Disturbance ◽  
Passive Components ◽  
Printed Circuit ◽  
Integrated Inductor ◽  
The Magnetic Field

Abstract We developed a system and a method to characterize the magnetic field induced by circuit board and electronic component, especially integrated inductor, with magnetic sensors. The different magnetic sensors are presented and several applications using this method are discussed. Particularly, in several semiconductor applications (e.g. Mobile phone), active dies are integrated with passive components. To minimize magnetic disturbance, arbitrary margin distances are used. We present a system to characterize precisely the magnetic emission to insure that the margin is sufficient and to reduce the size of the printed circuit board.

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