基于弱磁信号的磁性纳米粒子质量检测方法

Magnetic Nanoparticle Quality Detection Method Based on Weak Magnetic Signal

为了研究磁性纳米粒子质量与磁通密度的关系,提出了一种基于弱磁信号的磁性纳米粒子质量检测方法。选择亥姆霍兹线圈作为激励源,将磁性纳米粒子溶液放入恒定磁场中,磁性纳米粒子在激励磁场的作用下产生响应磁场。为避免受到激励磁场的影响,对响应磁场的单轴分量进行测量,经过分析得出不同磁性纳米粒子质量下磁通密度的变化规律,最终得出磁性纳米粒子质量与其产生的磁通密度之间的关系函数。结果表明,随着磁性纳米粒子质量的增多,其产生的磁通密度也随之增大,两者之间呈线性正相关函数关系。

In order to study the relationship between magnetic nanoparticle mass and magnetic flux density,a magnetic nanoparticle mass detection method based on weak magnetic signal was proposed.The Helmholtz coil was selected as the excitation source,and the magnetic nanoparticle solution was placed in a constant magnetic field,and the magnetic nanoparticle generates a response magnetic field under the action of the excitation magnetic field.In order to avoid the influence of the excitation magnetic field,the uniaxial component of the response magnetic field was measured,and the variation law of the magnetic flux density under different magnetic nanoparticles mass was obtained through analysis.Finally,the functional relationship between the magnetic nanoparticles mass and its magnetic flux density is obtained.The results show that with the increase of the mass of magnetic nanoparticles,the magnetic flux density is also increased,showing a linear positive correlation function.