Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/15383
標題: 同軸電纜之不同變形行為的模擬
Simulating test for the deformation of TDR coaxial cable
作者: 游俊祺
Yiu, Tsiung-Chi
關鍵字: TDR
時域反射技術
Landslide
Reflected signals
地滑
反射訊號
出版社: 土木工程學系所
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Pierce, (1994)“Use of Time Domain Reflectometry to Detect Bridge Scour and Monitor Pier Movement,” Proceedings of the Symposium on Time Domain Reflectometry in Environmental, Infrastructure, and Mining Applications, Evanston, Illinois, Sept 7-9, U.S. Bureau of Mines, pp. 579-587 7.Dowding, C. H. and C. E. Pierce, (1994)“Measurement of Localized Failure Planes in Soil with Time Domain Reflectometry,” Proceedings of the Symposium on Time Domain Reflectometry in Environmental, Infrastructure, and Mining Applications, Evanston, Illinois, Sept 7-9, U.S. Bureau of Mines, Special Publication, pp. 569-578 8.Kachanoski, R. G. and A. L. Ward,(1994)”Measurement of Subsurface Chemical Transport Using Time Domain Reflectometry,” proceedings of the Symposium on Time Domain Reflectometry in Evironmental, Unfrastructure, and Mining Applications, Evanston, Illinois,Sept 7-9,U.S. Bureau of Mines,pp.171-182 9.Look, B. G., Reeves, I. N., and Williams, D.J.(1994) ,Field Experiences Using Time Domain Reflectometry for Monitoring Moisture Changes in Road Embankments and Pavements, Proceedings of the Symposium on Time Domain Reflectometry in Environmental, Infrastructure, and Mining Applications, Evanston, Illinois, Sept 7-9, U.S. Bureau of Mines, Special Publication SP 19-94, 1994a, NTIS PB95-105789, pp. 374-385 10.McKown, T. O. and D. D. Eilers., (1994)“Explosive-Array Performance Measurement using Time Domain Reflectometry”. Proceedings of the Symposium on Time Domain Reflectometry in Environmental, Infrastructure, and Mining Applications, Evanston, Illinois, Sept 7-9, U.S. Bureau of Mines, Special Publication pp.46-55 11.Pierce, C. E., C. Bilaine, F.-C. Huang, and C. H. Dowding,(1994) “ Effects of Multiple Crimps and Cable Length on Reflection Signatures from Long Cables,” Proceedings of the Symposium on Time Domain Reflectometry in Environmental, Infrastructure, and Mining Applications, Evanston, Illinois, Sept 7-9, U.S. Bureau of Mines, pp. 540-554. 12.Topp,G.Clarke , Zegelin,S.J. , White,I.Monitoring Soil Water Content Using TDR : An Overview of Progress,proceedings of the Symposium on Time Domain Reflectometry in Evironmental, Unfrastructure, and Mining Applications, Evanston, Illinois,Sept 7-9,U.S. Bureau of Mines,Special Publication SP 19-94,1994,NTIS PB95-105789, pp.67-80 13.Tektronix,Inc.1502C Metallic Time-Domain Reflectometer User Manual,Nov (1997) 14.M.B. Su and Y. J. Chen ,(1998)“Multiple Reflection of Metallic Time Domain Reflectometry”, Experimental Techniques,Vol.22, No.1, pp.26-29. 15.Dowding.C.H and K.M. O’Connor, (1999)“GeoMeasurements by Pulsing TDR Cables and Probes” , pp116-117,U.S.A. 16.M.B. Su and Y. J. Chen ,(1999) “MTDR Monitoring Systems for the Integrity of Infrastructures” , Journal of Intelligent Material Systems and Structures , Vol.10 , pp242-247 17.M.B. Su and Y. J. 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摘要: 時域反射技術(TDR)主要是利用電磁波的折射與反射現象來找出傳輸路徑中不連續的位置以及特性阻抗;而埋設電纜線本身即為一具連續性、可多點量測的感應器。 就目前在梨山地滑區中已設置的9個TDR監測站,分別於A1、B5、B9及C2監測站發現有較為明顯的波形變化情形,藉此研究希望能透過室內試驗,加以探討現地較為不易分辨的波形產生之原因,並作合理的解釋。 本研究希望藉由室內試驗,利用不同的水泥砂漿配比及不同的同軸電纜,探討其對反射訊號的影響,進行更近一步的分析與探討。 最後根據各項試驗分析與結果,得到結論簡述如下: 1.在剪動試驗結果以面積法量化後發現,不同的水泥砂漿配比與剪動面積有一定關係,且會受到剪動帶寬度之影響。 2.在同軸電纜線上上漆,將會影響到水泥砂漿與同軸電纜線之間的握裹力,如改以在電纜線上設置節點的方式,將能更增加兩者之間的握裹力,且節點間距愈大拉伸量相較也愈大。 3.在研究中針對尖峰波形加以探討,初步判定應該為鋁製外殼破損時所造成此一波形變化,此現象將會造成後續有明顯的波形衰減情形。 4.就FAX12-50與SFX-500兩種同軸電纜線,經剪動量量化後,又以SFX-500剪動變形量較大及對剪變形也較為敏感。
TDR is used to find discontinuous positions in the communication path. TDR cable is served as a continuous, multiple points monitoring sensor, not limited by the installing direction neither encroached by the subterranean material. As to the nine TDR monitoring stations in Li-shan landslide area, at A1, B5, B9, and C2 stations it was discovered to have more manifested wave changes. It is hoped that through indoor simulation of this study, the reasons for occurrence of waveform change that are difficult to distinguish in the current site can be explored, and to make reasonable explanations about them. This study performs indoor experiments to using different ratios of cement mortar and different coaxial cables to explore the effect it has on reflected signals, and conduct further analysis and discussion. Finally, conclusions from analysis and results of each experiment are briefly described as follows: 1.After quantifying experiment results of shear test via area method, it was found that there is a definite relationship between different ratios of cement mortar and shear deformation, and it is affected by the width of shear band width. 2.Painting on coaxial cable wires affects the between cement mortar and coaxial cable wires; if alternatively nodes are set on the coaxial cable wires holding power between the two can be increased to a greater extension. Additionally, further the distance between nodes, greater the extension. 3.This study discusses positive reflection as shown in A1-TDR cable's record. Initially, it is determined that this waves change should be caused by damage of aluminum casing. This phenomenon results in a subsequent substantial weakening of waves. 4.As to the two types of coaxial cable wires, FAX12-50 and SFX-500, after quantification of shear deformation, SFX-500 has greater waveform change and sensitivity to shear deformation.
URI: http://hdl.handle.net/11455/15383
其他識別: U0005-2407200610173700
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-2407200610173700
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