权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of Magnetic Camera Using Hole Sensor and Magnetic Fluid

利用孔传感器和磁流体开发磁相机

基本信息

批准号：
12555022
负责人：
KAGEYAMA Kensuke
金额：
$ 8.51万
依托单位：
Saitama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

The high sensitivity hole sensor installed in XYZ three axial stage with resolution approximately 100 μ m scaning in three dimensions was assembled on an experimental basis for non-contact measurement of ferromagnetic materials. It measured the magnetic distribution around the steel sheet (the S45C) as a sample in the external magnetic field and the possibility of visualization of the ferromagnet with non- contact measurement was considered. As a result, it was difficult to observe of three dimensional shape of the S45C samples such as change of depth of the samples with conventional technique. In addition, although it is possible to detect the ferromagnetic samples, it was found that detection sensitivity of the penetration hole in the samples decreased rapidly with the increase of distance of the samples and the sensor. Next, the steel sheet (the S45C) and magnetic fluid was as the magnetic lens and was set at the back of the sensor to expect that it could focused the magnetic flux to the sensor. And, when the several types of shape of the magnetic lens was applied to testing, it indicated the possibility to detect the change of three dimensional shape of the ferromagnetic materials. On the other hand, FEM analysis of visualization measurement of the ferromagnetic material by this kind of magnetic lens did not obtain the tendency which is similar call by result experimental data. The further consideration of several conditions such as fluctuation of the external magnetic field sufficiently are needed to optimize of magnetic lens shape and visualize the magnetic materials. Using the results of this study, it is expected to develop the technology which visualizes the burying ferromagnetic materials like in the concrete.

在实验的基础上，组装了安装在XYZ三轴平台上的高灵敏度孔传感器，其分辨率约为100 μ m，可进行三维扫描，用于铁磁材料的非接触测量。以S45C钢片为例，在外加磁场中测量了钢片周围的磁场分布，并探讨了非接触式测量铁磁体可视化的可能性。结果，用常规技术难以观察S45 C样品的三维形状，例如样品的深度变化。此外，虽然可以检测铁磁样品，但发现样品中的穿透孔的检测灵敏度随着样品与传感器的距离的增加而迅速降低。接着，将钢板（S45 C）和磁流体作为磁透镜，并将其设置在传感器的后部，以期望其能够将磁通量聚焦到传感器。将几种形状的磁透镜应用于检测，表明了检测铁磁材料三维形状变化的可能性。另一方面，利用这种磁透镜对铁磁材料进行可视化测量的有限元分析，并没有得到与实验结果相似的趋势。为了优化磁透镜的形状并使磁性材料可视化，需要进一步考虑外部磁场的波动等几个条件。利用这项研究的结果，它有望开发的技术，可视化的铁磁材料埋在混凝土一样。