DETECTION OF HAZARDOUS MATERIALS IN CONTAINERS BY measurements based on nuclear magnetic resonance

摘要

1. A method of detecting hazardous materials according kotoromurazmeschayut non-metallic container containing a liquid sample in a static magnetic field applied to the fluid sample first pulse sequence of nuclear magnetic resonance having a frequency corresponding to the frequency of the proton nuclear magnetic resonance in the static magnetic field, producing a first plurality of measuring nuclear magnetic resonance signals from the sample liquid which is sensitive to the frequency of the proton nuclear magnetic resonance, of eryayut relaxation times for a plurality of received measurement signals of nuclear magnetic resonance, is applied to the fluid sample a second pulse sequence of nuclear magnetic resonance having a frequency corresponding chastoteN nuclear magnetic resonance in the static magnetic field, producing a second set of measuring nuclear magnetic resonance signals from the sensor to the nuclear magnetic chastoteN liquid sample iizmeryayut resonance signal amplitude for the second set of measuring signal in nuclear magnetic rezonansa.2. A method according to Claim. 1 according kotoromuoperatsiya measuring relaxation times for the first set of measuring nuclear magnetic resonance signals comprises time measurement (T) of the spin-lattice relaxation time and the effective time (T) posledovatelnosti.3 multipulse signal attenuation. A method according to claim. 2, according to the operation kotoromuna measuring relaxation times of the first plurality of nuclear magnetic resonance measurement signals additionally measured times T, having different values ​​of time TE