User:Magnetic models/sandbox
Method of testing the magnetoelastic properties of soft magnetic materials
[edit]Method suitable for effective testing of magnetoelastic effect in magnetic materials should fulfil following requirements [1]:
- magnetic circuit of tested sample should be closed. Open magnetic circuit causes demagnetization, what reduce magnetoelastic effect and complicate its analyse.
- distribution of stresses should be uniform. Value and direction of stresses should be known.
- there should be the possibility of winding of the sample by magnetizing and sensing windings - necessary to measure magnetic hysteresis loop under mechanical stresses.
Following methods of testing the magnetoelastic properties of magnetic materials were developed:
- tensile stresses applied to the strip of magnetic material in the shape of ribbon [2]. Disadvantage: open magnetic circuit of the tested sample.
- tensile and compressive stresses applied to frame sample [3]. Disadvantage: only bulk materials may be tested. No stresses in the joints of columns.
- compressive stresses applied to the ring core in direction of diameter[4]. Disadvantage: non-uniform stresses in the core .
- tensile and compressive stresses applied to the ring sample perpendicularly to its base [5] . Disadvantage: stresses are perpendicular to magnetizing field.
Applications of magnetoelastic effect
[edit]Magnetoelastic effect can be used in development of force sensors [6] [7]. This effect was used for sensors:
- in civil engineering[2].
- for monitoring of large diesel engines in locomotives[8].
- for monitoring of ball valves[8].
- for biomedical monitoring [9].
Magnetoelastic effect have to be also considered as side effect of accidental application of mechanical stresses to the magnetic core of inductive component, e.g. fluxgates [10].
Magnetovision is the measuring technique enabling visualization of magnetic field distribution in given space.
Magnetovision measuring setup
[edit]Magnetovision measuring stand consists magnetometer, X-Y or X-Y-Z movement mechanism and data processing and visualization system. Following modes of acquisition of magnetovision signal are possible:
- magnetometer moves in measuring area (e.g. over tested object)
- tested object moves against magnetometer
- array of magnetic field sensors is used
Magnetometers for magnetovision
[edit]Typically for magnetoviosion following types of sensors may be used:
- magnetoresistance effect based sensors [11]
- fluxgate magnetometers
- Hall effect sensors
- SQUIDs
Types of magnetovision
[edit]There are different modes of magnetovision measurements. Measurements may be performed in 2D (X-Y) or 3D (X-Y-Z). Moreover, measurements of magnetic field may be absolute or differential.
Applications of magnetovision
[edit]Magnetoviosion may be used for:
- nondestructive testing in civil engineering
- detection of dangerous metallic objects [11]
- archeology
Data fusion in magnetovision
[edit]Magnetovision images may be used for data fusion with visual signal. This creates new possibility of presentation of magnetic field distribution for further analyses.
References
[edit]- ^ Bienkowski, A.; Kolano, R.; Szewczyk, R (2003). "New method of characterization of magnetoelastic properties of amorphous ring cores". Journal of Magnetism and Magnetic Materials. 254: 67. doi:10.1016/S0304-8853(02)00755-2.
- ^ a b Bydzovsky, J.; Kollar, M.; Svec, P.; et al. (2001). "Magnetoelastic properties of CoFeCrSiB amorphous ribbons - a possitility of their application" (PDF). Journal of Electrical Engineering. 52: 205.
{{cite journal}}: Explicit use of et al. in:|first3=(help) - ^ Bienkowski, A.; Rozniatowski, K.; Szewczyk, R (2003). "Effects of stress and its dependence on microstructure in Mn-Zn ferrite for power applications". Journal of Magnetism and Magnetic Materials. 254: 547. doi:10.1016/S0304-8853(02)00861-2.
- ^ Mohri, K.; Korekoda, S. (1978). "New force transducers using amorphous ribbon cores". IEEE Transactions on Magnetics. 14: 1071. doi:10.1109/TMAG.1978.1059990.
- ^ Szewczyk, R.; Bienkowski, A.; Salach, J.; et al. (2003). "The influence of microstructure on compressive stress characteristics of the FINEMET-type nanocrystalline sensors" (PDF). Journal of Optoelectronics and Advanced Materials. 5: 705.
{{cite journal}}: Explicit use of et al. in:|first3=(help) - ^ Bienkowski, A.; Szewczyk, R. (2004). "The possibility of utilizing the high permeability magnetic materials in construction of magnetoelastic stress and force sensors". Sensors and Actuators A - Physical. 113. Elsevier: 270. doi:10.1016/j.sna.2004.01.010.
- ^ Bienkowski, A.; Szewczyk, R. (2004). "New possibility of utilizing amorphous ring cores as stress sensor". Physica Status Solidi A - Applied Research. 189: 787. doi:10.1002/1521-396X(200202)189:3<787::AID-PSSA787>3.0.CO;2-G.
- ^ a b Bienkowski, A.; Szewczyk, R.; Salach, J. (2010). "Industrial Application of Magnetoelastic Force and Torque Sensors" (PDF). Acta Physica Polonica A. 118: 1008.
- ^ Meydan, T.; Oduncu, H. (1997). "Enhancement of magnetostrictive properties of amorphous ribbons for a biomedical application". Sensors and Actuators A - Physical. 59. Elsevier: 192. doi:10.1016/S0924-4247(97)80172-0.
- ^ Szewczyk, R.; Bienkowski, A. (2004). "Stress dependence of sensitivity of fluxgate sensor". Sensors and Actuators A - Physical. 110 (1–3). Elsevier: 232. doi:10.1016/j.sna.2003.10.029.
- ^ a b Nowicki, M.; Szewczyk, R. (2013). "Ferromagnetic Objects Magnetovision Detection System". Materials. 6 (12). MDPI: 5593. doi:10.3390/ma6125593.
{{cite journal}}: CS1 maint: unflagged free DOI (link)