Study on Quantification of Power Frequency Electric Field Coupling to Human Body.

工频电场对人体耦合的量化研究。

基本信息

批准号：
60550209
负责人：
ISAKA Katsuo
金额：
$ 1.22万
依托单位：
The University of Tokushima
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

It is well-known that the currents are induced in human body exposed to power frequency electric fields, depending on its grounding impedance and the irregularity of its surface. Since such currents may induce the health effects, the long-term electric field effects on humans have been discussed by the World Health Organization (WHO).This research has been conducted in order to quantify the micro-currents induced in human body to which the electric fields couple. The experiments were performed using the parallel-plate electrodes whose separation was one meter. The induced currents in human model were measured in a uniform field of 10 kV/m. Also analysed were the scaling factors and induced current densities inside the brain using the charge simulation method and finite element method. The followings have been concluded.1. The experiments were performed in a strong electric field condition. The induced currents could be accurately measured in such a condition using the fiber-optics and the micro-switch circuits.2. The induced current densities at head, chest, waist and so on were experimentally quantified. Those values are important when the scaling factors for experimental animals are determined. The basic considerations into the scaling factors were taken using the charge simulation method and the finite element method.3. The induced current density inside the brain was theoretically quantified by taking into consideration the impedances of the scalp, skull, and cerebrospinal layer. It is found that the conductivity of the cerebrospinal layer is so low that the brain is electrostatically shielded. The skull's impedance would be a determining factor ; therefore, its impedance should be made clear more accurately.

众所周知，根据其接地阻抗和表面的不规则性，暴露于功率频率电场的人体中诱导了电流。由于这样的电流可能引起健康影响，因此世界卫生组织（WHO）讨论了对人类的长期电场影响。这项研究是为了量化电场夫妇对人体诱导的微电流的量化。使用分离为一米的平行板电极进行实验。人类模型中的诱导电流在10 kV/m的均匀场中测量。还使用电荷仿真方法和有限元方法分析了大脑内部的缩放因子和诱导的电流密度。以下结束了1。实验是在较强的电场条件下进行的。可以使用光纤和微切口电路在这种情况下准确测量诱导电流。2。对头部，胸部，腰部等的诱导电流密度进行了实验定量。当确定实验动物的缩放因子时，这些值很重要。使用电荷仿真方法和有限元方法进行了缩放因子的基本考虑。3。理论上通过考虑头皮，头骨和脑脊液的阻抗来量化大脑内部诱导的电流密度。发现脑脊液的电导率太低，以至于大脑被静电屏蔽。头骨的阻抗将是决定因素。因此，应更准确地确保其阻抗。