Data Processing of Manganite Sensors Array for Measurements of Non- Homogeneous Pulsed Magnetic Field

Abstract

The application of manganite sensors array for measurements of magnetic field non-homogeneity and further digital data processing are described. The measuring system consisting of the array of 8 sensors, the digital circuit for primary signal processing, personal computer for final data processing and pulsed magnetic field source is offered. The measurement of magnetic field distribution can be carried out by the application of polycrystalline La0.83Sr0.17MnO3 manganite sensors, which magneto-resistance has no saturation effects in high magnetic fields and does not depend on of magnetic field direction. Described digital circuit for data processing includes 8-channels 10-bit A/D converter, 8-bit microcontroller, flash memory and it is connected with PC via RS-232 interface. Taking into account difference of sensor’s characteristics and temperature dependence, the calibration should be done with further data memorization for final data processing. A special program for data processing is under development using Delphi and C++ codes. Offered digital circuit for experimental data processing has flexible architecture, is relatively effective and potentially applicable Ill. 3, bibl. 7 (in English; summaries in English, Russian and Lithuanian).