Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2022. №7
ContentsFull text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2022.7.7
THE DEVICE FOR MEASURING THE VECTOR MODULE OF MAGNETIC FIELD
I.B. Shirokov, M.A. Durmanov, E.A. Redkina
Sevastopol state university
Institute of radioelectronics and information security
299053, Russia, Sevastopol, Universitetskaya, 33
The paper was received June 20, 2022.
Abstract. The development of block-diagram of portable receiving device with microcontroller processing of radio signal parameters received is proposed in the paper. The receiving device is coupled to a three-coordinate magnetic antenna, which allows reception of magnetic field in three spatial components in order to measure the amplitude of each component of the magnetic field. The geometric sum of modules of magnetic field intensity vectors of each component gives the final vector module of magnetic field strength, which helps to localize the object, that is, to determine the distance to it by the amplitude method. The amplifiers with controlled gain factors allow to increase the amplitude of the received signal and maintain it near the maximum dynamic range of the ADC module to provide the most accurate measurement of low-voltage amplitudes. An algorithm for calculating the square root of integer values is presented, which necessary to calculate the final vector module of magnetic field strength using portable measuring devices based on microcontrollers of low computational power. Finding the square root of a number is done by sequentially sorting the numbers and squaring them until the resulting number matches the original under root value. This method is implemented by cyclic shift of the bit of the corresponding bit of the binary representation of the number. The effect of a common ferrite core on the reception of orthogonal components of the magnetic field intensity by orthogonally located finite inductors is analyzed.
Key words: three-axis antenna, magnetic field, vector, module, microcontroller, signal, square root.
Corresponding author: Shirokov Igor' Borisovich, shirokov@ieee.org
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For citation:
Shirokov I.B., Durmanov M.A., Redkina E.A. The device for measuring the vector module of magnetic field. Zhurnal radioelektroniki [Journal of Radio Electronics] [online]. 2022. №7. https://doi.org/10.30898/1684-1719.2022.7.7 (In Russian)