DEVICE FOR DETECTING AND RECOGNITION OF SUBSTANCES BY NUCLEAR QUADRUPOLE RESONANCE METHOD Russian patent published in 2018 - IPC G01N24/08 

FIELD: physics.

SUBSTANCE: usage: for detection and recognition of substances by nuclear quadrupole resonance. Summary of the invention is that a system for detecting and recognizing substances by the nuclear quadrupole resonance method contains a high-frequency generator, an indicator, series-connected pulse modulator, a first inductor, a signal sensor, a low-noise amplifier, a logarithmic amplifier, and an amplitude detector, wherein a control input of the pulse modulator is combined with a gate input of the low-noise amplifier and is connected to an output of a modulating pulse generator, signal divider, first and second controlled attenuators, first and second controlled phase shifters, second inductor and an oscilloscope, and the signal sensor is made as a subtracting transformer, wherein the signal divider, the first controlled attenuator and the first controlled phase shifter are connected in series and connected between an output of the modulator and an input of the first inductor, second controlled attenuator, the second controlled phase shifter and the second inductor are connected in series, wherein an input of the second controlled phase shifter is connected to a second output of the signal divider, output of the modulating pulse generator is connected to the control inputs of the indicator and the oscilloscope, and the signal sensor is inductively coupled to the first and second inductors, herewith, a control pulse generation unit, a synchronous detector and an integrator are additionally introduced, wherein an input of the control pulse generating unit is connected to the output of the modulating pulse generator, first three outputs of the control pulse generating unit are connected to the corresponding control inputs of the high-frequency generator, and the fourth output of the control pulse generating unit is connected to a control input of the synchronous detector, the signal input of which is connected to an output of the amplitude detector, and an output through the integrator is connected to an input of the indicator.

EFFECT: ensuring the possibility of reducing the errors of detection and recognition of substances based on nuclear quadrupole resonance.

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