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A probe for in situ, remote, detection of defects in buried plastic natural gas pipelines
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10.1063/1.2821238
/content/aip/journal/rsi/78/12/10.1063/1.2821238
http://aip.metastore.ingenta.com/content/aip/journal/rsi/78/12/10.1063/1.2821238

Figures

Image of FIG. 1.
FIG. 1.

Probe head configuration.

Image of FIG. 2.
FIG. 2.

Normalized electrode ratios per unit penetration depth.

Image of FIG. 3.
FIG. 3.

(Color online) Normalized capacitance in fF/mm in air for combination of dimension ratios.

Image of FIG. 4.
FIG. 4.

Position of holes in acrylic sample.

Image of FIG. 5.
FIG. 5.

(Color online) Probe traverse of 6.1 and holes (raw frequencies).

Image of FIG. 6.
FIG. 6.

(Color online) Probe traverse of 6.1 and holes (normalized frequencies).

Image of FIG. 7.
FIG. 7.

(Color online) Normalized output as generation 1 probe moves away from acrylic sample.

Image of FIG. 8.
FIG. 8.

(Color online) Normalized output as generation 2 probe moves away from acrylic sample.

Image of FIG. 9.
FIG. 9.

(Color online) Second generation probe traverse of acrylic pipe.

Image of FIG. 10.
FIG. 10.

(Color online) Defect example (Battelle Laboratories).

Image of FIG. 11.
FIG. 11.

Probe output during transit of polyethylene pipe with intermittently spaced defects.

Tables

Generic image for table
Table I.

Characteristics of defects in polyethylene pipe.

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/content/aip/journal/rsi/78/12/10.1063/1.2821238
2007-12-18
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A probe for in situ, remote, detection of defects in buried plastic natural gas pipelines
http://aip.metastore.ingenta.com/content/aip/journal/rsi/78/12/10.1063/1.2821238
10.1063/1.2821238
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