SYSTEM OF INDUCTIVE READING OF ELECTROMAGNETIC SIGNALS FROM THE BODY Russian patent published in 2023 - IPC A61B5/522 A61B5/265 A61B5/515 

FIELD: medicine.

SUBSTANCE: invention provides a system for magnetically inductive sensing of electromagnetic signals emitted from a body in response to electromagnetic excitation signals applied to the body. A group of inventions relates to a system and method for inductive reading of physiological parameters for reading electromagnetic signals emitted from a body in response to electromagnetic excitation signals transmitted to the said body. The system contains a loop resonator, a means for generating a signal, and a means for signals processing. The resonator contains a loop antenna and a capacitor electrically connected to it. The antenna loop has one turn with a circumferential length l. In this case, the normalized radial frequency≡ω/ω_ref electromagnetic excitation signals is from 0.025 to 0.50, whereω_ref = 2πc/l , π is the ratio of the circumference of a circle to its diameter, and c is the speed of light. The process is as follows: a loop resonator is excited to generate electromagnetic excitation signals having a radial frequency ω. The signals are sent to the body. A resonator is used to establish inductive coupling with electromagnetic signals emitted from the body in response to excitation signals. Read electromagnetic signals emitted from the body based on the detection of electrical changes in the loop antenna, indicating changes in the measured inductance in the loop, while the loop generates excitation signals. Process the signals received at the antenna. The frequency of the signals is reduced by mixing each signal with a reference waveform of a different frequency. A differential filter is applied to extract an output signal having a frequency being the difference between the frequency of the waveform and the received signal. In this case, the normalized radial frequency≡ω/ω_ref electromagnetic excitation signals is from 0.025 to 0.50, whereω_ref = 2πc/l , π is the ratio of the circumference of a circle to its diameter, and c is the speed of light.

EFFECT: by the increased power of detected electromagnetic signals received from the body during inductive reading, and reduced noise level in them, the accuracy of the analysis is increased, by reducing the frequency of signals by mixing each signal with a reference waveform of a different frequency, applying a differential filter to extract the output a signal having a frequency being the difference between the frequency of the oscillating and received signals.

14 cl, 12 dwg