論文

査読有り
2019年6月

LED照明から放射される電磁雑音による医用テレメータへの電磁干渉に関する評価方法の検討

医療機器学
  • 有江 授
  • ,
  • 石田 開
  • ,
  • 呉 奕鋒
  • ,
  • 後藤 薫
  • ,
  • 松本 泰
  • ,
  • 廣瀬 稔

89
3
開始ページ
257
終了ページ
265
記述言語
日本語
掲載種別
研究論文(学術雑誌)
DOI
10.4286/jjmi.89.257
出版者・発行元
一般社団法人日本医療機器学会

Switched mode power supplies built in LED lamp radiate electromagnetic noise (LED noise) and may interfere with wireless medical telemeters (WMTs). We conducted research on statistical characteristics of LED noise and its effect on the receiver sensitivity of the WMT. We measured timedomain waveform of LED noise. At the wideband reception, LED noise has impulsive characteristics due to high-speed switching, but this impulsive nature is difficult to identify when the narrow bandwidth. Additionally, this noise is to be approximated as Gaussian noise, because the WMTs use a narrow reception bandwidth of 8.5 kHz and LED noise was limited to this bandwidth. We investigated the required signal power of the WMTs for critical reception under interference by LED noise and for comparison with Gaussian noise. The LED noise and Gaussian noise induce similar degradation in the WMT, confirming that the Gaussian approximation is promising for the evaluation of interference in the WMT caused by LED lamps. Moreover, we showed an experimentally investigation of spatial distribution of LED noise around an LED lamp and its power line under the basic configuration. The spatial variation caused by a standing wave of the disturbance current was observed in the parallel direction to the power line, and the noise amplitude was decreased away from the power line in the perpendicular direction.

リンク情報
DOI
https://doi.org/10.4286/jjmi.89.257
CiNii Articles
http://ci.nii.ac.jp/naid/130007675789
CiNii Books
http://ci.nii.ac.jp/ncid/AA12291278
ID情報
  • DOI : 10.4286/jjmi.89.257
  • ISSN : 1882-4978
  • CiNii Articles ID : 130007675789
  • CiNii Books ID : AA12291278

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