Details
| Original language | English |
|---|---|
| Article number | 1778 |
| Journal | Buildings |
| Volume | 12 |
| Issue number | 11 |
| Publication status | Published - 24 Oct 2022 |
| Externally published | Yes |
Abstract
The available conventional sensors, like displacement transducers, used in the Structural Engineering Laboratory are expensive. In addition to that, the need for data acquisition devices also escalates the expense invested in point contact measurement systems. The recent appeal of vision-based measurement and the search for cost-effectiveness has led to an exploration of the established sampling moiré method using cheap closed-circuit television (CCTV) cameras as a viable option. The sampling moiré method is simple and analyzes the displacements from grating images by a phase-shifting method. Several trial experiments were conducted, which demonstrated that the setup is at least as accurate as the traditional measuring system. An experiment was conducted on a steel I-beam for displacement measurement, which displayed satisfactory results. In addition, the setup was also tested for strain measurement, and it has yielded promising results that need fine-tuning. This paper discusses the challenges, findings, and the possibility of incorporating vision-based displacement measurements in laboratory platforms.
Keywords
- CCTV camera, displacement and strain, image processing, sampling moiré method, vision-based measurement
ASJC Scopus subject areas
- Engineering(all)
- Building and Construction
- Engineering(all)
- Architecture
- Engineering(all)
- Civil and Structural Engineering
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In: Buildings, Vol. 12, No. 11, 1778, 24.10.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - CCTV Camera Array for the Displacement and Strain Measurement of a Beam Specimen in a Laboratory
AU - Tuladhar, Rujika
AU - Thammarak, Punchet
AU - Elias, Said
N1 - Publisher Copyright: © 2022 by the authors.
PY - 2022/10/24
Y1 - 2022/10/24
N2 - The available conventional sensors, like displacement transducers, used in the Structural Engineering Laboratory are expensive. In addition to that, the need for data acquisition devices also escalates the expense invested in point contact measurement systems. The recent appeal of vision-based measurement and the search for cost-effectiveness has led to an exploration of the established sampling moiré method using cheap closed-circuit television (CCTV) cameras as a viable option. The sampling moiré method is simple and analyzes the displacements from grating images by a phase-shifting method. Several trial experiments were conducted, which demonstrated that the setup is at least as accurate as the traditional measuring system. An experiment was conducted on a steel I-beam for displacement measurement, which displayed satisfactory results. In addition, the setup was also tested for strain measurement, and it has yielded promising results that need fine-tuning. This paper discusses the challenges, findings, and the possibility of incorporating vision-based displacement measurements in laboratory platforms.
AB - The available conventional sensors, like displacement transducers, used in the Structural Engineering Laboratory are expensive. In addition to that, the need for data acquisition devices also escalates the expense invested in point contact measurement systems. The recent appeal of vision-based measurement and the search for cost-effectiveness has led to an exploration of the established sampling moiré method using cheap closed-circuit television (CCTV) cameras as a viable option. The sampling moiré method is simple and analyzes the displacements from grating images by a phase-shifting method. Several trial experiments were conducted, which demonstrated that the setup is at least as accurate as the traditional measuring system. An experiment was conducted on a steel I-beam for displacement measurement, which displayed satisfactory results. In addition, the setup was also tested for strain measurement, and it has yielded promising results that need fine-tuning. This paper discusses the challenges, findings, and the possibility of incorporating vision-based displacement measurements in laboratory platforms.
KW - CCTV camera
KW - displacement and strain
KW - image processing
KW - sampling moiré method
KW - vision-based measurement
UR - http://www.scopus.com/inward/record.url?scp=85141836975&partnerID=8YFLogxK
U2 - 10.3390/buildings12111778
DO - 10.3390/buildings12111778
M3 - Article
VL - 12
JO - Buildings
JF - Buildings
IS - 11
M1 - 1778
ER -