Multi-probe multi-frequency nuclear magnetic resonance rock soil in-situ monitoring system

A multi-probe nuclear magnetic resonance (NMR) rock soil in-situ monitoring system, comprising:

• a multi-probe component, comprising a cylindrical shell and a plurality of nuclear magnetic probes disposed inside the cylindrical shell, wherein the plurality of the nuclear magnetic probes are sequentially arranged in a spacing along an axial direction of the cylindrical shell, and the plurality of the nuclear magnetic probes are located at soil layers of different depths respectively and have different measurement frequencies;
• each of the nuclear magnetic probes comprises a magnetic body, and the magnetic bodies in different nuclear magnetic probes have different magnetic field strengths such that each of the nuclear magnetic probes has a different resonant frequency;
• a spectrograph component, configured to transmit and receive NMR-measured radio frequency signals;
• an industrial control computer, configured to transmit a measurement instruction and perform real-time processing on measurement data;
• and
• a power cable, connected to the plurality of the nuclear magnetic probes, the spectrograph component and the industrial control computer to supply power and transmit the measurement data.