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| Title: | Signal loss, spatial resolution, and sensitivity of long coaxial crack sensors |
| Author (s): | Chen, Genda Drewniak, James L. Pommerenke, David Sun, Shishuang |
| Department/Lab Affiliations: | Center for Infrastructure Engineering Studies Civil, Architectural & Environmental Engineering Electrical and Computer Engineering Electromagnetic Compatibility Laboratory Materials Research Center Materials Science & Engineering Natural Hazard Mitigation Institute (NHMI) University Transportation Center |
| Keywords: | coaxial cable sensors reinforced concrete (RC) structures signal loss |
| Issue Date: | 2004 |
| Publisher: | International Society for Optical Engineering |
| Citation: | Shishuang Sun, David Pommerenke, James L. Drewniak, and Genda Chen. Signal Loss, Spatial Resolution, and Sensitivity of Long Coaxial Crack Sensors.”, Proc. SPIE, Vol. 5391, 786, 2004. |
| Abstract: | Configuration-based coaxial cable sensors have recently been developed to detect cracks in reinforced concrete (RC) structures. These sensors have shown a high sensitivity when applied to several short RC flexural members. However, the signal losses resulting from a long cable sensor may distort the initial waveform of the electromagnetic wave propagating along the cable, thereby compromising the spatial resolution and sensitivity of this sensor. The signal losses consist of the contributions from the skin effect of conductors, energy absorption in the dielectric material, and impedance mismatch loss due to multiple signal reflections resulting from discontinuities caused by the separation between the adjacent spirals, which acts as the outer conductor of a cable sensor. This paper summarizes the basic physics of signal losses in cable sensors, and investigates the impact of the signal losses on the spatial resolution and sensitivity of a cable sensor over distance. Several methods are proposed to simulate and quantify various factors affecting the signal losses |
| Type: | Article - Journal text |
| In Title: | Proceedings of SPIE The International Society for Optical Engineering |
| Copyright Notice: | Pre-print: archiving status unclear; Post-print: author can archive; This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. FULL COPYRIGHT INFORMATION: |
| Link to this page: |
| title | Signal loss, spatial resolution, and sensitivity of long coaxial crack sensors |
| contributor.author | Chen, Genda |
| contributor.author | Drewniak, James L. |
| contributor.author | Pommerenke, David |
| contributor.author | Sun, Shishuang |
| contributor.deptlab | Center for Infrastructure Engineering Studies |
| contributor.deptlab | Civil, Architectural & Environmental Engineering |
| contributor.deptlab | Electrical and Computer Engineering |
| contributor.deptlab | Electromagnetic Compatibility Laboratory |
| contributor.deptlab | Materials Research Center |
| contributor.deptlab | Materials Science & Engineering |
| contributor.deptlab | Natural Hazard Mitigation Institute (NHMI) |
| contributor.deptlab | University Transportation Center |
| subject | coaxial cable sensors |
| subject | reinforced concrete (RC) structures |
| subject | signal loss |
| date.issued | 2004 |
| publisher | International Society for Optical Engineering |
| identifier.citation | Shishuang Sun, David Pommerenke, James L. Drewniak, and Genda Chen. Signal Loss, Spatial Resolution, and Sensitivity of Long Coaxial Crack Sensors.”, Proc. SPIE, Vol. 5391, 786, 2004. |
| identifier.pub | http://dx.doi.org/10.1117/12.540033 |
| description.abstract | Configuration-based coaxial cable sensors have recently been developed to detect cracks in reinforced concrete (RC) structures. These sensors have shown a high sensitivity when applied to several short RC flexural members. However, the signal losses resulting from a long cable sensor may distort the initial waveform of the electromagnetic wave propagating along the cable, thereby compromising the spatial resolution and sensitivity of this sensor. The signal losses consist of the contributions from the skin effect of conductors, energy absorption in the dielectric material, and impedance mismatch loss due to multiple signal reflections resulting from discontinuities caused by the separation between the adjacent spirals, which acts as the outer conductor of a cable sensor. This paper summarizes the basic physics of signal losses in cable sensors, and investigates the impact of the signal losses on the spatial resolution and sensitivity of a cable sensor over distance. Several methods are proposed to simulate and quantify various factors affecting the signal losses |
| type | Article - Journal |
| type.DCMIType | text |
| type.status | Postprint |
| rights | Pre-print: archiving status unclear; Post-print: author can archive; |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights.URI | |
| relation.isPartOf | Proceedings of SPIE The International Society for Optical Engineering |
| date.available | 2008-07-21T21:00:22Z |
| identifier.persist.URI |