NUCLEAR QUADRUPOLE RESONANCE SIGNAL DETECTION DEVICE Russian patent published in 2023 - IPC G01N24/08 

FIELD: detection of nuclear quadrupole resonance signals.

SUBSTANCE: device for detecting nuclear quadrupole resonance signals additionally includes a control system for one-time and cyclic independent operation of frequency and time pulse generation units, a nuclear quadrupole resonance spectrum analysis unit with high weight and size characteristics, made on the basis of microcircuits: capacitance gyrators G_C and inductance gyrators G_L, an analytical unit of weak NQR signals, an ambient temperature control unit, whereas the output of the sweep frequency generator is connected to the first input of the operating mode selection unit through a frequency pulse shaper, through the first switch Vk.1, through its short-circuited terminals c and d, as well as the output of the sweep frequency generator is connected in parallel with the second input of the operating mode selection unit through the temporary pulse generator, through the second switch Vk.2, through its short-circuited terminals a and b; the third input of the operating mode selection unit is connected through the third switch Vk.3, through its short-circuited terminals d and e with the output of the unit for detecting the emission spectrum of nuclear quadrupole resonance signals; the output of the operating mode selection unit through the input of the power amplifier is connected in parallel with the input of the matching device of the transmitting system and through the n₁ input with the receiving system information generator; n outputs of the matching device of the transmitting system are connected to each of the n emitters, in the system of emitters 7, through the terminal g, starting from 7₁ to 7_N ; n inputs of the information generator of the receiving system are connected to N in-phase lines 6, for example, n inputs of the information generator are connected to the first in-phase receiving line from the first antenna 6₁₁ to n6_1N ; the output of the information generator of the receiving system is connected to a unit for detecting the emission spectrum of nuclear quadrupole resonance signals, through a filter unit and through a unit for analysing the emission spectrum of nuclear quadrupole resonance signals; the output of the filter unit is connected in parallel with the first input of the analytical unit of weak NQR signals, and the second input of the analytical unit of weak NQR signals is connected to the output of the ambient temperature control unit, the output of the analytical unit is connected to the terminal d of the third switch Vk.3 of the third input of the mode selection unit work; the radiating part of the device for detecting emitters of nuclear quadrupole resonance radiation is placed between two shielding planes made in the form of truncated cylindrical planes.

EFFECT: reduced weight and size characteristics of the device, as well as increased reliability of the analysis of the frequency properties of weak radiated NQR fields.

29 cl, 41 dwg