scholarly journals Spatially resolved measurement of magnetic flux density using a 32×32 CMOS-integrated hall sensor array

2010 ◽  
Vol 5 ◽  
pp. 981-984 ◽  
Author(s):  
J.M. Stephan ◽  
P. Gieschke ◽  
O. Paul ◽  
P. Ruther
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Sensor Array ◽  
Hall Sensor ◽  
Magnetic Flux Density ◽  
Spatially Resolved

scholarly journals Coil Positioning for Wireless Power Transfer System of Automatic Guided Vehicle Based on Magnetic Sensing

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5304
Author(s):  
Ce Liang ◽  
Yanchi Zhang ◽  
Zhonggang Li ◽  
Feng Yuan ◽  
Guang Yang ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Data Fusion ◽  
Flux Density ◽  
Sensor Array ◽  
Wireless Power Transfer ◽  
Magnetic Flux Density ◽  
Power Transfer ◽  
Wireless Power ◽  
Automatic Guided Vehicle ◽  
Receiving Coil

As an auxiliary function of the wireless power transfer (WPT) system, coil positioning can solve the power and efficiency degradation during power transmission caused by misalignment of the magnetic coupler. In this paper, a Hall sensor array is used to measure the change of magnetic flux density. By comparing the multisensor data fusion results with the preset data obtained from the coil alignment, the real-time accurate positioning of the receiving coil can be realized. Firstly, the positioning model of the receiving coil is built and the variation of magnetic flux density with the coil misalignment is analyzed. Secondly, the arrangement of the Planar 8-direction symmetric sensor array and the positioning algorithm based on data fusion of magnetic flux density variations are proposed. In order to avoid coil positioning misalignment caused by the unstable magnetic field distribution which is actually affected by the change of mutual inductance during automatic guided vehicle (AGV) alignment, the constant current strategy of primary and secondary sides is proposed. Finally, the coil positioning experimental platform is built. The experimental results show that the coil positioning method proposed in this paper has high accuracy, and the positioning error is within 4 cm.

Position Signal Compensation Control Technique of Hall Sensor Generated by Uneven Magnetic Flux Density

2018 ◽  
Vol 28 (3) ◽  
pp. 1-4 ◽  
Author(s):  
Jong Suk Lim ◽  
Jae-Kwang Lee ◽  
Hyun-Soo Seol ◽  
Dong-Woo Kang ◽  
Ju Lee ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Hall Sensor ◽  
Control Technique ◽  
Magnetic Flux Density ◽  
Compensation Control ◽  
Position Signal

scholarly journals Planar Hall sensor for quantitative measurement of pipe wall thickness reduction based on the magnetic flux density method

Measurement ◽  
2021 ◽  
pp. 109782
Author(s):  
Hong-Quang Pham Conceptualisation ◽  
Trung-Kien Nguyen ◽  
Quang-Ngan Pham ◽  
Van-Sy Le ◽  
Minh-Hung Vu ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Wall Thickness ◽  
Quantitative Measurement ◽  
Pipe Wall ◽  
Hall Sensor ◽  
Thickness Reduction ◽  
Magnetic Flux Density ◽  
Pipe Wall Thickness ◽  
Density Method

scholarly journals Evaluation of the Impact of Static Interference on an Empirical Data Based Static Magnetic Localization Setup for Capsule Endoscopy

2020 ◽  
Vol 6 (3) ◽  
pp. 66-69
Author(s):  
Samuel Zeising ◽  
Daisuke Anzai ◽  
Angelika Thalmayer ◽  
Georg Fischer ◽  
Jens Kirchner
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Capsule Endoscopy ◽  
Empirical Data ◽  
Geomagnetic Field ◽  
Sensor Array ◽  
Magnetic Flux Density ◽  
Wearable Sensor ◽  
Differential Measurement ◽  
The Impact

AbstractIn this paper, the impact of interference due to the geomagnetic field on a static magnetic localization setup for capsule endoscopy, which is suitable for a wearable application, was investigated. For this purpose, a study was carried out in which the average abdomen size of 15 subjects was evaluated. With the determined geometry values, a setup consisting of three elliptical sensor rings was modeled. Simulations were performed, where the magnetic flux density was evaluated at the sensors by using different-sized magnets. The measured values were compared with each other and the geomagnetic flux density. The results revealed that the measured values were for all evaluated magnet sizes of the order of the geomagnetic flux density, which is problematic since the calibration of sensors is no longer valid if the orientation of the wearable sensor array is changed. However, it is suggested that a differential measurement is suitable for the proposed system and could reduce static interference caused by the geomagnetic field.

scholarly journals Design of a New 1D Halbach Magnet Array with Good Sinusoidal Magnetic Field by Analyzing the Curved Surface

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2522
Author(s):  
Guangdou Liu ◽  
Shiqin Hou ◽  
Xingping Xu ◽  
Wensheng Xiao
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Permanent Magnet ◽  
Flux Density ◽  
Permanent Magnets ◽  
Air Gap ◽  
Curved Surface ◽  
Magnetic Flux Density ◽  
Sinusoidal Magnetic Field ◽  
The Magnetic Field

In the linear and planar motors, the 1D Halbach magnet array is extensively used. The sinusoidal property of the magnetic field deteriorates by analyzing the magnetic field at a small air gap. Therefore, a new 1D Halbach magnet array is proposed, in which the permanent magnet with a curved surface is applied. Based on the superposition of principle and Fourier series, the magnetic flux density distribution is derived. The optimized curved surface is obtained and fitted by a polynomial. The sinusoidal magnetic field is verified by comparing it with the magnetic flux density of the finite element model. Through the analysis of different dimensions of the permanent magnet array, the optimization result has good applicability. The force ripple can be significantly reduced by the new magnet array. The effect on the mass and air gap is investigated compared with a conventional magnet array with rectangular permanent magnets. In conclusion, the new magnet array design has the scalability to be extended to various sizes of motor and is especially suitable for small air gap applications.

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