Patent ID: 8643371

Claim:
A low-field nuclear magnetic resonance system for measuring a magnetic resonance signal of an object to be measured, comprising: a pre-magnetization module including at least two magnets having the same size, the pre-magnetization module forming a receiving space between the two magnets to receive the object to be measured and establishing a pre-magnetization field for the object to be measured; a uniform magnetic field coil module including a tilt angle adjusting unit and a magnetic field coil unit, in which the tilt angle adjusting unit comprises a tilt bottom base, being adjustable in its tile angle, and the magnetic field coil unit is placed on an inclined plane of the tilt bottom base and comprises a coil set and a power source, wherein the coil set includes two pairs of coils with different radius, being allocated in a concentric circle manner and being electrically connected to the power source, thereby adjusting background magnetic field intensity of the magnetic resonance; a pulse and receiving coil module including a pulse coil, a receiving coil and a preamplifier, in which the pulse coil provides a pulse magnetic field for changing a direction of an atomic nuclear magnetic torque of the object to be measured, the receiving coil detects a precession magnetic signal of the magnetic torque and outputs an electric signal to be fed to the preamplifier, and the preamplifier outputs a first amplified signal; a filter amplifier module including a filter amplifier circuit, for receiving the first amplified signal, filtering noise and outputting a second amplified signal; a signal acquisition module being respectively electrically connected with the pulse coil and the filter amplifier module for receiving the second amplified signal and outputting an acquisition signal; and a processing module electrically connected to the signal acquisition module, for receiving and analyzing to process the acquisition signal.