FIELD: measurement technology.
SUBSTANCE: method is based upon remote detecting of material by using distant magnetic resonance induced by electromagnet wave in the material. Response frequency is measured subsequently which response is used to judge on the presence of material. Exciting electromagnet signal is irradiated at frequency, which is much higher than frequency of magnetic resonance in material subject to detection. Irradiated exciting electromagnet signal is modulated at frequency of magnet resonance. Response is registered at modulation frequency.
EFFECT: longer distance of detection.
1 dwg
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