Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/75632
Title: Temperature effects on vision measurement system in long-term continuous monitoring of displacement
Authors: Zhou, HF
Zheng, JF
Xie, ZL
Lu, LJ
Ni, YQ 
Ko, JM 
Keywords: Videogrammetry
Environmental effect
Temperature
Wind turbine blade
Structural health monitoring
Issue Date: 2017
Publisher: Pergamon Press
Source: Renewable energy, 2017, v. 114, pt. B, p. 968-983 How to cite?
Journal: Renewable energy 
Abstract: Videogrammetry has been recognized as a promising method for monitoring the dynamics of wind turbines. On the way forward, the environmental effects on the measurement accuracy of the videogrammetry are key issues should be solved. This study therefore carried out an investigation into the temperature-induced measurement error of the videometric technique in long-term continuous monitoring of displacement. First, videometric measurement tests specifically targeted for improving the applicability of the videogrammetry to wind turbine blade monitoring were conducted. Making use of the measurement data, the characteristics of the temperature-induced measurement errors were obtained by examining them as a whole as well as their wavelet decomposed components. Comprehensive correlation analyses were performed to quantify the degree of correlation between measurement error and temperature change. It is found that the vertical displacement measurement error and temperature change have a satisfactory linear relationship, while the relationship between horizontal displacement measurement error and temperature change is more scattered. Making use of the unique features of the deformation and thermal expansion of a utility-scale wind turbine blade, it is likely to subtract the temperature-induced measurement error from the measured displacement with the help of the relationship between measurement error and temperature change or a time-frequency approach.
URI: http://hdl.handle.net/10397/75632
ISSN: 0960-1481
EISSN: 1879-0682
DOI: 10.1016/j.renene.2017.07.104
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

1
Citations as of May 28, 2018

WEB OF SCIENCETM
Citations

1
Last Week
0
Last month
Citations as of May 28, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.