送電線下の単板構造の磁気遮蔽の研究
建築物における磁気シールドを実際の問題に沿って検討した。代表的な問題として、送電ケーブル下の建物が磁気の影響を受けて室内のCRTに画面の揺れが生じる場合をとりあげた。その対策としては遮蔽板を天井にいれる方法を採用した。実情を考察してモデルを作り、各種の遮蔽用材料を選んで実験による遮蔽性能の違いを求め、次いで予測計算をおこない精度を検証した。
Research Concerning Magnetic Shielding Consisiting of a Localized Flat Plate under power lines
The issue of magnetic shielding in buildings was examined through the analysis of a practical problem. Power lines running above a room where many CRTs were in operation seemed to cause interference on the CRT screens. A ferromagnetic plate placed under the roof slab was an effective solution. A model was constructed based on such situation, experiments were carried out, and the differences in the magnetic field distribution depending on the shielding material were clarified. Calculations were done to estimate the shielding effect and, to determine the accuracy of the estimate, the results were compared with the results of the actual experiments.
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