Effects of Multiple Crimps and Cable Length on Reflection Signatures from Long Cables

Pierce, Charles E.; Bilaine, Christopher; Huang, Fei-chiu; Dowding, Charles H.

doi:10.21949/1404095

i

Effects of Multiple Crimps and Cable Length on Reflection Signatures from Long Cables

2002-03-19
By Pierce, Charles E. ; Bilaine, Christopher ; Huang, Fei-chiu

File Language:

English

Details

Creators:

Pierce, Charles E. ; Bilaine, Christopher ; Huang, Fei-chiu ; Dowding, Charles H.
Subject/TRT Terms:
DOI:

https://doi.org/10.21949/1404095
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Northwestern University (Evanston, Ill.). Infrastructure Technology Institute
Abstract:

The accuracy of time domain reflectometry (TDR) measurements of rock shearing with cable lengths greater than 60 m has not been adequately documented. This paper presents the results of controlled crimping and shearing of a 530 m long, 22.2mm diameter coaxial cable for comparison with theory and the existing data from cables up to 60 m long. Effects of both single and multiple deformities along transmission lengths of 94m, 268m, and 530m were investigated. The Northwestern University TDR Signature Analysis (NUTSA) program was employed to track and analyze reflection spikes in the waveforms produced by controlled deformation. The results show that pulse attenuation has a significant effect on signal reflections. Reflection amplitudes were reduced by 500% as cable length increased from 94 m to 268 m. Signal reflections produced by downstream deformations are slightly decreased (amplitude reduction <) when single or multiple deformations are applied upstream on the cable. Deformation-reflection relationships can be characterized as bi-linear or exponential, and show that shear deformation can be effectively correlated with TDR reflection amplitude at ; distances up to 268 m.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/13049/dot_13049_DS1.pdf
File Type:

[PDF - 44.90 KB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:4ec7c33c1cd9e1438955fb07edce8444aca4c218f22bd4e2b32a5d5715e9c076b5c494659f3e5343af67e68902d158dae740147c30d41ace7535e9fc1dfdc571

File Language:

English

ON THIS PAGE

Details

Found an issue?

Send us an email at:

publishinghd@cdc.gov

ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.