DRUGS AND EXPLOSIVES DETECTOR UNIT Russian patent published in 2002 - IPC

FIELD: nuclear quadruple resonance application. SUBSTANCE: detector unit has signal processor, indicating device, receiving device, frequency synthesizer, synchronizer, power amplifier, and nuclear quadruple resonance signal transducer; first output of synchronizer is connected to first input of receiving device, its second output, to second input of receiving device; synchronizer first input is connected to frequency synthesizer output; newly introduced in detector unit are band filter and damping device whose input is connected to third output of synchronizer and output, to first input of nuclear quadruple resonance signal transducer; synchronizer fourth output is connected to input of power amplifier whose output is connected to input of band filter; output of the latter is connected to second input of nuclear quadruple resonance signal transducer whose output is connected to third input of receiving device. First and second outputs of receiving device are connected, respectively, to first and second inputs of signal processor whose first and second outputs are connected to first and second inputs of indicating device; third output of signal processor is connected to second input of synchronizer; third input of the latter functions as input of drugs and explosives detector unit. EFFECT: enhanced probability of detecting drugs and explosives; enhanced sensitivity of unit due to improved signal-to-noise ratio; reduced transmitter power. 2 cl, 5 dwg