Abstract
In Japan it happens that building parts made of concrete suddenly collapse to create obstacles to the traffic in tunnels, on highways and bridges. Thus, the safety issue has become a serious social problem. Therefore, the detection of hidden defects in concrete building constructions in order to prevent an accidental damage is the important application area for nondestructive testing (NDT) techniques. Until now, the inspection is typically performed by using a hammer that is subjective and takes too much time. Infrared thermography is a promising NDT technique that might help in the fast detection of invisible (hidden) defects. Transient, or active, thermal NDT requires external thermal stimulation of the objects under test by warming up or cooling down the object surface. However, low-power and long heating is significantly affected by environmental conditions. Recent Japanese research in this area has been rather qualitative, i.e. without putting the accent on evaluating parameters of hidden defects. In this study, the experimental results are modeled and processed by using the thermal NDT software package developed at the Tomsk Institute of Introscopy. This has allowed not only optimizing test parameters but also obtaining reasonable estimates of defect parameters for air-filled voids and inclusions in concrete. It is shown that MRTD values measured by ourselves for the first time are of a little help while evaluating detection limits.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Editors | K.E. Cramer, X.P. Maldague |
| Pages | 339-344 |
| Number of pages | 6 |
| Volume | 5073 |
| DOIs | |
| Publication status | Published - 2003 |
| Event | Thermosense XXV - Orlando, FL, United States Duration: 22 Apr 2003 → 24 Apr 2003 |
Other
| Other | Thermosense XXV |
|---|---|
| Country | United States |
| City | Orlando, FL |
| Period | 22.4.03 → 24.4.03 |
Fingerprint
Keywords
- Buried object
- Detection limit
- Infrared radiometer
- IR camera
- MKTD
- Remote sensing
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
Cite this
Studying the inspection limits in detecting buried objects by using infrared thermography. / Kamoi, Arao; Okamoto, Yoshizo; Vavilov, Vladimir.
Proceedings of SPIE - The International Society for Optical Engineering. ed. / K.E. Cramer; X.P. Maldague. Vol. 5073 2003. p. 339-344.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Studying the inspection limits in detecting buried objects by using infrared thermography
AU - Kamoi, Arao
AU - Okamoto, Yoshizo
AU - Vavilov, Vladimir
PY - 2003
Y1 - 2003
N2 - In Japan it happens that building parts made of concrete suddenly collapse to create obstacles to the traffic in tunnels, on highways and bridges. Thus, the safety issue has become a serious social problem. Therefore, the detection of hidden defects in concrete building constructions in order to prevent an accidental damage is the important application area for nondestructive testing (NDT) techniques. Until now, the inspection is typically performed by using a hammer that is subjective and takes too much time. Infrared thermography is a promising NDT technique that might help in the fast detection of invisible (hidden) defects. Transient, or active, thermal NDT requires external thermal stimulation of the objects under test by warming up or cooling down the object surface. However, low-power and long heating is significantly affected by environmental conditions. Recent Japanese research in this area has been rather qualitative, i.e. without putting the accent on evaluating parameters of hidden defects. In this study, the experimental results are modeled and processed by using the thermal NDT software package developed at the Tomsk Institute of Introscopy. This has allowed not only optimizing test parameters but also obtaining reasonable estimates of defect parameters for air-filled voids and inclusions in concrete. It is shown that MRTD values measured by ourselves for the first time are of a little help while evaluating detection limits.
AB - In Japan it happens that building parts made of concrete suddenly collapse to create obstacles to the traffic in tunnels, on highways and bridges. Thus, the safety issue has become a serious social problem. Therefore, the detection of hidden defects in concrete building constructions in order to prevent an accidental damage is the important application area for nondestructive testing (NDT) techniques. Until now, the inspection is typically performed by using a hammer that is subjective and takes too much time. Infrared thermography is a promising NDT technique that might help in the fast detection of invisible (hidden) defects. Transient, or active, thermal NDT requires external thermal stimulation of the objects under test by warming up or cooling down the object surface. However, low-power and long heating is significantly affected by environmental conditions. Recent Japanese research in this area has been rather qualitative, i.e. without putting the accent on evaluating parameters of hidden defects. In this study, the experimental results are modeled and processed by using the thermal NDT software package developed at the Tomsk Institute of Introscopy. This has allowed not only optimizing test parameters but also obtaining reasonable estimates of defect parameters for air-filled voids and inclusions in concrete. It is shown that MRTD values measured by ourselves for the first time are of a little help while evaluating detection limits.
KW - Buried object
KW - Detection limit
KW - Infrared radiometer
KW - IR camera
KW - MKTD
KW - Remote sensing
UR - http://www.scopus.com/inward/record.url?scp=0042967496&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042967496&partnerID=8YFLogxK
U2 - 10.1117/12.487450
DO - 10.1117/12.487450
M3 - Conference contribution
AN - SCOPUS:0042967496
VL - 5073
SP - 339
EP - 344
BT - Proceedings of SPIE - The International Society for Optical Engineering
A2 - Cramer, K.E.
A2 - Maldague, X.P.
ER -