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Precise dosimetry of current density inside human body exposed to ELF EM field

暴露于 ELF 电磁场的人体内部电流密度的精确剂量测定

基本信息

批准号：
17560246
负责人：
KAMIMURA Yoshitsugu
金额：
$ 1.92万
依托单位：
Utsunomiya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560246/
关键词：
IH cooker electric shaver leakage magnetic field human model induced current SPFD method bioelectromagnetics EM dosimetry

项目摘要

First of all, the leakage magnetic field of the IH cooker has been measured on some conditions, and the magnetic dipole source was modeled. Then, the maximum induced current densities by the difference of the model have been compared among three kinds of anatomical human models of the Japanese adult male/female and the American adult male. Moreover, the induced current densities averaged by the area of 1 cm^2 is compared with the guideline of international commission on non-ionizing radiation protection (ICNIRP). As a result, it is found that the maximum induced current are considerably different depending on human models, but the induced currents that exceed the guideline of ICNIRP may not flow inside human body in the case with the portable type IH cooker and pan designed for the IH cooker.Next, the 3-D distribution of the leakage field of an AC drive electric shaver has been measured in precision, and the equivalent simple magnetic source model has been obtained. In addition, the induced current density distribution in the human body head model has been obtained using this simple source model.Since 3-D field distribution was not able to be measured by study collaborator's convenience, an original 3-D field measurement system has been developed for the induction heating cooker. This system measures the field distribution combining the position sensor (motion capture) and the field sensor.The future plans of this study are to try a real-time visualization of the magnetic field distribution and the application to the source quest with this new 3-D field measurement system, and to develop the technique for effectively reducing the leakage magnetic field by shielding the household appliance.

首先，在一定条件下测量了IH电磁炉的漏磁场，并对磁偶极子源进行了建模。然后，比较了日本成年男性/女性和美国成年男性的三种解剖人体模型之间模型差异的最大感应电流密度。此外，将1 cm^2面积上的平均感应电流密度与国际非电离辐射防护委员会（ICNIRP）的指南进行了比较。结果发现，根据人体模型的不同，最大感应电流有很大差异，但在便携式IH炊具和专为IH炊具设计的锅的情况下，超过ICNIRP准则的感应电流可能不会在人体内部流动。接下来，精确测量了交流驱动电动剃须刀的漏磁场的3D分布，并获得了等效的简单磁源模型。此外，利用这个简单的源模型获得了人体头部模型中的感应电流密度分布。由于研究合作者无法方便地测量3D场分布，因此为感应加热炊具开发了独创的3D场测量系统。该系统结合了位置传感器（运动捕捉）和场传感器来测量磁场分布。本研究的未来计划是尝试利用这种新型3D场测量系统实现磁场分布的实时可视化及其在源头探索中的应用，并开发通过屏蔽家用电器来有效减少漏磁场的技术。