公开(公告)号：US09534963B2

公开(公告)日：2017-01-03

申请号：US14412443

申请日：2013-12-14

Applicant: Huazhong University of Science and Technology

Inventor： Wenzhong Liu ,  Jing Zhong ,  Ling Jiang ,  Ming Yang ,  Pu Zhang ,  Ming Zhou

IPC: A61B5/01 ,  G01K7/36 ,  A61B5/05

CPC classification number: G01K7/36 ,  A61B5/01 ,  A61B5/05 ,  A61B2562/0285

Abstract: Provided is a magnetic nano temperature measurement method under a triangle wave excitation magnetic field relating to a technical field of nano measurement. The method further comprises steps of: (1) positioning a magnetic nano sample at a measured object; (2) applying a triangle wave excitation magnetic field on area of the magnetic nano sample; (3) detecting a triangle wave excitation magnetic field-time curve and a magnetization-time curve of the magnetic nano sample; (4) obtaining a magnetizing curve of the magnetic nano sample, namely excitation magnetic field-magnetization curve, by the triangle wave excitation magnetic field curve and the magnetization curve, and sampling the magnetizing curve to obtain magnetization Mi of the magnetic nano sample under excitation magnetic field Hi; and (5) determining temperature of the measured object by curve fitting with excitation magnetic field Hi as input, magnetization Mi as output, and a relationship between the excitation magnetic field and the magnetization as objective function. The invention obtains a magnetizing curve rapidly using a triangle wave excitation magnetic field, and realizes real-time and precise temperature measurement based on magnetic nanoparticles by inversion algorithms according to the magnetizing curve based on a temperature measurement model of magnetic nanoparticles under a DC magnetic field.

Abstract translation: 提供了一种与纳米测量技术领域相关的三角波激励磁场下的磁性纳米温度测量方法。 该方法还包括以下步骤：（1）将磁性纳米样品定位在测量对象处; （2）在磁性纳米样品的面积上施加三角波激发磁场; （3）检测磁性纳米样品的三角波激发磁场时间曲线和磁化时间曲线; （4）通过三角波激励磁场曲线和磁化曲线获得磁性纳米样品的励磁磁化曲线，即励磁磁场磁化曲线，并对磁化曲线进行采样，以获得磁性纳米样品在激发下的磁化强度 磁场Hi （5）通过以激励磁场Hi作为输入，磁化Mi作为输出的曲线拟合以及激励磁场与磁化之间的关系作为目标函数来确定测量对象的温度。 本发明使用三角波激发磁场快速获得磁化曲线，并且通过基于磁性纳米颗粒在直流磁场下的温度测量模型的磁化曲线的反演算法，实现基于磁性纳米粒子的实时和精确的温度测量 。