Hall sensor line array for magnetic field inline measurements of PM-exited rotors

2012 ◽  
Author(s):  
J. Tremel ◽  
J. Franke
Keyword(s):  
Magnetic Field ◽  
Hall Sensor ◽  
Line Array

Non-Contact Tension Sensing Using Fe-Ga Alloy Strip

2015 ◽  
Author(s):  
JinHyeong Yoo ◽  
James B. Restorff ◽  
Marilyn Wun-Fogle
Keyword(s):  
Magnetic Field ◽  
Giant Magnetoresistance ◽  
Low Frequency ◽  
Strain Sensor ◽  
Hall Sensor ◽  
Pickup Coil ◽  
Mechanical Shock ◽  
Permeability Change ◽  
Stress Monitoring ◽  
Villari Effect

This paper describes a proof-of-concept non-contact strain sensor, using a magnetostrictive Fe-Ga alloy (Galfenol). Magnetostrictive materials demonstrate dimensional changes in response to a magnetic field. In contrast with typical piezoceramic materials, Galfenol is the most ductile of the current transduction materials and appears to have an excellent ability to withstand mechanical shock and tension. Galfenol also exhibits the inverse (Villari) effect: both the magnetization and permeability change in response to an applied stress. Galfenol has low hysteresis loses, less than ∼10% of its transduction potential over a range of −20 to +80 °C. The magnetization’s response to stress depends strongly on both magnetic field bias and alloy composition. Galfenol’s Villari effect can be used in various sensor configurations together with either a giant magnetoresistance (GMR) sensor, Hall Effect sensor or pickup coil to sense the magnetization / permeability changes in Galfenol when stressed. The sensor described in this paper utilizes the permeability change, which is not time dependent and can measure static loads. The design reported here targets low force, low frequency applications, such as inclination measurements and stress monitoring. The sensor was able to measure both static and dynamic stress. The static sensitivity was +3.64 Oe/kN for the Hall sensor close to the bias magnet and −1.49 Oe/kN for the Hall sensor at the other end of the Galfenol strip. We conclude that a Galfenol strain sensor is a viable candidate for bolt stress monitoring in critical applications.

Hall sensor response to an inhomogeneous magnetic field

2005 ◽  
Vol 5 (5) ◽  
pp. 934-941 ◽  
Author(s):  
C. Cordier ◽  
L. Mechin ◽  
C. Gunther ◽  
M.L.C. Sing ◽  
D. Bloyet ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Inhomogeneous Magnetic Field ◽  
Hall Sensor ◽  
Sensor Response

High spatial resolution Hall sensor array for edge plasma magnetic field measurements

2005 ◽  
Vol 76 (9) ◽  
pp. 093501 ◽  
Author(s):  
Yuhong Liu ◽  
David A. Maurer ◽  
Gerald A. Navratil ◽  
Nicholas Rivera
Keyword(s):  
Magnetic Field ◽  
Spatial Resolution ◽  
Sensor Array ◽  
High Spatial Resolution ◽  
Field Measurements ◽  
Hall Sensor ◽  
Edge Plasma ◽  
Magnetic Field Measurements

Research on Measuring Method of the Thickness of Quartz Bulb Shell Based on Hall Effect

2012 ◽  
Vol 503-504 ◽  
pp. 1369-1374
Author(s):  
Rong Kai He ◽  
Hu Meng
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Measuring Method ◽  
Hall Sensor ◽  
Steel Ball ◽  
Hall Voltage ◽  
Single Chip ◽  
Collection Data ◽  
Hardware Circuit ◽  
Magnetic Steel

The hall sensor based on Hall Effect is in direct proportional to hall voltage produced under different magnetic field intensity, and the measuring probe designed according to principle of Hall Effect is used to measure the thickness of metal halide lamp arc tube quartz bulb shell. It is required to place magnetic steel ball in the bulb, the distance between the magnetic steel ball and probe is the thickness of bulb shell, which is in direct proportional to hall voltage produced by hall sensor in the magnetic field of magnetic steel ball. It is required to make use of single-chip machine, A/D converter, amplifier and others to constitute as a hardware circuit to conduct collection, data processing and value conversion for hall voltage and use LCD to show the thickness value of bulb shell.

Current Intensity and Magnetic Field Measurement Based on Circular Coil Magnetic Inclination

2014 ◽  
Vol 1044-1045 ◽  
pp. 750-754
Author(s):  
Zhu Qin Liu
Keyword(s):  
Magnetic Field ◽  
Hall Sensor ◽  
Reverse Direction ◽  
Magnetic Field Measurement ◽  
Load Current ◽  
Direction Change ◽  
Circular Coil ◽  
Magnetic Inclination ◽  
Magnetic Induction Intensity ◽  
The Magnetic Field

Using SS95A integrated Hall sensor is advanced, the magnetic induction intensity detecting load current circular coil center point, through the positive, reverse direction change current circular coil, accurate measurement of the magnetic field strength and magnetic inclination in the local.

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