Microcontroller-based instrument for measuring magnetic susceptibility using mutual inductance bridge
Abstract
A microcontroller-based instrument for measurement of magnetic susceptibility was designed and tested. The system used Mutual Inductance Bridge (MIB) as the sensor. The MIB was designed as a three-coil system. The change in voltage upon placement of the sample in one of the two secondary coils was monitored and converted to digital data using ADC of the ZiLOG Z8F6401 microcontroller.
The microcontroller system was tested and the precision of the readings was determined. For samples that are paramagnetic, the voltage reading of the instrument is higher than the reading without a sample and therefore gives positive values. However on materials that are known to be diamagnetic, the voltage reading of the instrument is lower than the voltage reading without the sample giving a negative reading. Various aluminum samples of increasing sizes were tested. It was observed that the magnetic susceptibility obtained by the instrument increases as the size of the sample increases.
Downloads
Published
Issue
Section
License
By submitting their manuscript to the Samahang Pisika ng Pilipinas (SPP) for consideration, the Authors warrant that their work is original, does not infringe on existing copyrights, and is not under active consideration for publication elsewhere.
Upon acceptance of their manuscript, the Authors further agree to grant SPP the non-exclusive, worldwide, and royalty-free rights to record, edit, copy, reproduce, publish, distribute, and use all or part of the manuscript for any purpose, in any media now existing or developed in the future, either individually or as part of a collection.
All other associated economic and moral rights as granted by the Intellectual Property Code of the Philippines are maintained by the Authors.
