Metal iplikli dokuma kumaşlarının elektromanyetik kalkanlama etkinliğinin mobil cihazlar ile tespiti
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Date
2016-07-27
Authors
Karaman, Ömer Faruk
Journal Title
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Publisher
Uludağ Üniversitesi
Abstract
Bu çalışmada metal iplik içerikli dokuma kumaşların elektromanyetik kalkanlama etkinliğinin (EMSE) yeni bir yöntem ile tespiti hedeflenmiştir. Bu amaçla metal tel içerikli ipek viskon karışımı iplikler üretilmiş ve bu iplikler atkı ipliği olarak, polyester iplikler de çözgü ipliği kullanılarak kumaş numuneleri elde edilmiştir. Üretilen kumaşlar öncelikle kafes oluşturabilmek için 2 eş parça kesilip 90 derece döndürülerek birbiri üzerine lamine edilmiştir. Laminasyon için belirlenen kat sayıları 2,4,8,12,16 olup bu kumaşların elektromanyetik kalkanlama etkinlikleri mobil cihazlarda bulunan GSM modülünden okunan GSM sinyal seviyeleri üzerinden ölçülmüştür. Testler lamine edilmiş kumaş yapılarının arasına cep telefonu yerleştirilerek GSM sinyal seviyesindeki değişimler izlenmiştir. Ölçülen güç değerlerine göre EMSE değerleri hesaplanmıştır.
In this study, we introduce an alternative method to evaluate the electromagnetic shielding effectiveness (EMSE) of woven fabrics containing metal wires. For experimental measurements, hybrid silk viscose yarns containing metal wires were first produced. Conductive test fabrics were then produced using the hybrid weft yarns and polyester warp yarns. The produced fabrics were separated in two parts and laminated together after rotating one fabric by 90 degrees to create a grid structure. The laminated fabrics were then folded by several times to create multiple layers such as 2,4,8,12,16. The EMSE of the multiple layered fabrics was measured over GSM signals received by a mobile device. For EMSE evaluation, the mobile device was placed between the laminated fabrics. The EMSE values of the fabrics were then calculated in accordance with the power variations of GSM signals.
In this study, we introduce an alternative method to evaluate the electromagnetic shielding effectiveness (EMSE) of woven fabrics containing metal wires. For experimental measurements, hybrid silk viscose yarns containing metal wires were first produced. Conductive test fabrics were then produced using the hybrid weft yarns and polyester warp yarns. The produced fabrics were separated in two parts and laminated together after rotating one fabric by 90 degrees to create a grid structure. The laminated fabrics were then folded by several times to create multiple layers such as 2,4,8,12,16. The EMSE of the multiple layered fabrics was measured over GSM signals received by a mobile device. For EMSE evaluation, the mobile device was placed between the laminated fabrics. The EMSE values of the fabrics were then calculated in accordance with the power variations of GSM signals.
Description
Keywords
Metal iplik, Elektromanyetik kalkanlama etkinliği, Dokuma kumaş, Metallic yarn, Electromagnetic shielding effectiveness, Woven fabrics
Citation
Çeven, E. K. vd. (2016). "Metal iplikli dokuma kumaşlarının elektromanyetik kalkanlama etkinliğinin mobil cihazlar ile tespiti". Uludağ Üniversitesi Mühendislik Fakültesi Dergisi, 21(2), 85-94.