Detection method of nuclear precession magnetic field and nuclear magnetic resonance gyroscope

The invention discloses a method for detecting a nuclear precession magnetic field, the nuclear precession magnetic field is generated by a magnetic field generation assembly, and the method comprises the following steps: applying an excitation magnetic field with preset magnetic induction intensity to the magnetic field generation assembly; detecting a magnetic field of the magnetic field generation assembly to obtain a magnetic field detection signal, the magnetic field detection signal comprising a nuclear precession magnetic field signal; a reference signal is adopted to demodulate the magnetic field detection signal to obtain the nuclear precession magnetic field signal, the frequency of the reference signal is the same as the harmonic frequency of the excitation magnetic field, and the phase of the reference signal is an arbitrary value. According to the detection method for the nuclear precession magnetic field, the nuclear precession magnetic field signal can be obtained through single-axis parameter