Abstract
Gas transmission pipelines in the United States are primarily inspected using the magnetic flux leakage (MFL) nondestructive evaluation (NDE) technique. However, accurate analysis of the NDE signals in terms of the underlying defects requires a thorough knowledge of various operational parameters such as B-H characteristics of the pipe wall, the velocity of the scanning tool, etc. In certain situations, information about such operational parameters is either absent or hard to obtain. Appropriate signal processing techniques can be applied to the raw MFL signals to ensure that defect characterization is possible in spite of local variations in the test situation. This paper presents two such signal processing methods—one, to compensate the MFL signal for variations in pipe-material grade, and the other to remove the effects of signal distortion that occur due to the velocity of the scanning device.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 233-247 |
| Number of pages | 15 |
| Journal | Research in Nondestructive Evaluation |
| Volume | 8 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jan 1 1996 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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Signal processing for in-line inspection of gas transmission pipelines. / Mandayam, S.; Udpa, L.; Udpa, S. S.; Lord, W.
In: Research in Nondestructive Evaluation, Vol. 8, No. 4, 01.01.1996, p. 233-247.Research output: Contribution to journal › Article
TY - JOUR
T1 - Signal processing for in-line inspection of gas transmission pipelines
AU - Mandayam, S.
AU - Udpa, L.
AU - Udpa, S. S.
AU - Lord, W.
PY - 1996/1/1
Y1 - 1996/1/1
N2 - Gas transmission pipelines in the United States are primarily inspected using the magnetic flux leakage (MFL) nondestructive evaluation (NDE) technique. However, accurate analysis of the NDE signals in terms of the underlying defects requires a thorough knowledge of various operational parameters such as B-H characteristics of the pipe wall, the velocity of the scanning tool, etc. In certain situations, information about such operational parameters is either absent or hard to obtain. Appropriate signal processing techniques can be applied to the raw MFL signals to ensure that defect characterization is possible in spite of local variations in the test situation. This paper presents two such signal processing methods—one, to compensate the MFL signal for variations in pipe-material grade, and the other to remove the effects of signal distortion that occur due to the velocity of the scanning device.
AB - Gas transmission pipelines in the United States are primarily inspected using the magnetic flux leakage (MFL) nondestructive evaluation (NDE) technique. However, accurate analysis of the NDE signals in terms of the underlying defects requires a thorough knowledge of various operational parameters such as B-H characteristics of the pipe wall, the velocity of the scanning tool, etc. In certain situations, information about such operational parameters is either absent or hard to obtain. Appropriate signal processing techniques can be applied to the raw MFL signals to ensure that defect characterization is possible in spite of local variations in the test situation. This paper presents two such signal processing methods—one, to compensate the MFL signal for variations in pipe-material grade, and the other to remove the effects of signal distortion that occur due to the velocity of the scanning device.
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UR - http://www.scopus.com/inward/citedby.url?scp=0030374653&partnerID=8YFLogxK
U2 - 10.1080/09349849609409601
DO - 10.1080/09349849609409601
M3 - Article
AN - SCOPUS:0030374653
VL - 8
SP - 233
EP - 247
JO - Research in Nondestructive Evaluation
JF - Research in Nondestructive Evaluation
SN - 0934-9847
IS - 4
ER -