The aim of thesis was to perform the characterization of the coil. The results,
that we got when measuring the magnetic field density of the coil (later the magnetic
field of the coil), would provide information regarding other materials that can also be
magnetized (knowing the properties of the material). The coil is used to magnetize the
strips which are utilized in conjunction with magnetic encoders to provide information
on the position or rotation of axes, or to provide information on linear displacement.
The coil on the tape creates magnetic poles with north or south orientation. The poles
are read by a magnetic encoder, which determines the given subjects position. It is
very important that the poles are properly magnetized and shifted.
To begin with the task, a test site had to be set up. Firstly, basic measuring
instrumentation to carry out this project, had to be chosen. As a measuring sensor for
measuring the magnetic field of the coil, a development board with a Hall element
(later a sensor) was chosen. Later the sensor was adjusted, so that it served our
measurements as best as possible. The sensor returns a voltage between 0 and 3.3 V at
the output, and the magnetic field of the coil from the obtained voltage was calculated.
Final findings are the results of the coil magnetic field measurements, that were
measured considering the changes along all three axes (X, Y and Z) and in different
shields settings, whose purpose is to direct the magnetic field. To conclude, we
discovered that we can achieve highly directed magnetic field up to 600 mT using the
measured coil.
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