星载材料极弱剩磁测量方法研究

To overcome the difficulty of measuring the weak magnetic values of scientific exploration satellite materials, this study proposed a measurement method for extremely weak remanence in satellite components and developed a corresponding measurement system. Shielding technology was employed to eliminate the interference of external magnetic fields. Subsequently, a measurement system was constructed within the shielding system. The spectrum information of the magnetic field of the rotating test piece was collected using a zero-field atomic magnetometer. Finally, the magnetic characteristic data of the specimen was obtained through the wavelet multiresolution analysis method. The experimental results demonstrated that this method could effectively extract the extremely weak remanence signal. The system stability was better than 1×10^-12 T / 30 min, with a magnetic field resolution surpassing 1×10^-12 T. Additionally, the resolution order of magnetic moment extraction reached 10^-6 A·m². The proposed method provides a pathway for ensuring magnetic cleanliness across an entire satellite and enables high-precision detection of the space magnetic field.