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Research on Evaluation of and Protection from Electromagnetic Field in Highly Advanced Social Systems

高度先进社会系统电磁场评估与防护研究

基本信息

批准号：
01302030
负责人：
KAWAMURA Tatsuo
金额：
$ 2.94万
依托单位：
Institute of Industrial Science, The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01302030/
关键词：
Electric Field Magnetic field Electromagnetic Interference Measurement Biological Effect

项目摘要

The research has been devoted on (1) Measurement and analysis of electric and magnetic field in power frequency ; (2) Method of evaluation of ion flow and low-frequency magnetic field in an organism ; (3) Measurement and analysis of wide-band electromagnetic field.Regarding the fields of power frequency, factors influencing the accuracy of a conventional electric field meter are analyzed. A new 3-dimensional magnetic-field sensor employing a hole device is developed, and magnetic-field environment in a living room is investigated. Computer codes for the analysis of 3-D magnetic field in air have also been developed, and magnetic fields around a power station or a transmission line are evaluated. These are fundamentals in the research of the impact of power-frequency fields on the environment.Low-frequency intense magnetic field or ion flow need to be evaluated in the aspect of environmental influence, as the social system develops. Analyzing methods have been developed, and physical and biological phenomena under intense magnetic field are experimentally investigated, showing the importance of the subject to be investigated further.In regard to induction or interference to various systems, measurement and evaluation of wide-band electromagnetic field are studied. Artificial electromagnetic noise such as in the vicinity of a power, station and natural noise from lightning discharges have been measured by wide-band recording devices. A new electro-optic electric field measuring device incorporating a Pockets' cell and interferometric technique is developed. Wide-band electromagnetic noise of up to GHz generated by a discharge of a small gap is investigated in relation to the phase of the discharge phenomena. In the theoretical aspect, the mechanism of induction of voltage on a distribution line or a communication line by wide-band electromagnetic field is clarified.

本课题的研究内容包括：（1）工频电场和磁场的测量与分析;（2）生物体内离子流和低频磁场的评价方法;（3）宽频带电磁场的测量与分析。研制了一种新型的基于孔器件的三维磁场传感器，并对居室内的磁场环境进行了研究。还开发了用于分析空气中三维磁场的计算机代码，并对发电站或输电线路周围的磁场进行了评估。这些都是研究工频场对环境影响的基础，随着社会制度的发展，需要从环境影响的角度对低频强磁场或离子流进行评价。分析方法不断发展，强磁场下的物理现象和生物现象也得到了实验研究，这表明了该课题的重要性。关于对各种系统的感应或干扰，研究了宽带电磁场的测量和评估。人工电磁噪声，如在附近的一个电源，站和自然噪声从闪电放电已被测量的宽带记录设备。本文介绍了一种采用Pockets盒和干涉技术的新型电光电场测量装置。宽带电磁噪声高达GHz的放电产生的一个小间隙的放电现象的相位的关系进行了研究。在理论方面，阐明了宽带电磁场在配电线路或通信线路上感应电压的机理。