Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography

For a belt conveyor, a belt with mini-cracks influences the safety of the operation of the belt conveyor devices significantly. The lumpy material rubbing against a belt with mini-cracks will lead to detrimental tears on the belt while the conveyor works at high speeds. In order to detect mini-crack...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Fei Zeng, Sheng Zhang, Tao Wang, Qing Wu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	laser excited thermography rapid detection mini-crack conveyor belt Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/5e1a72df3f8a4d488cc75688556309b0
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:5e1a72df3f8a4d488cc75688556309b0
record_format	dspace
spelling	oai:doaj.org-article:5e1a72df3f8a4d488cc75688556309b02021-11-25T16:37:37ZMini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography10.3390/app1122107662076-3417https://doaj.org/article/5e1a72df3f8a4d488cc75688556309b02021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10766https://doaj.org/toc/2076-3417For a belt conveyor, a belt with mini-cracks influences the safety of the operation of the belt conveyor devices significantly. The lumpy material rubbing against a belt with mini-cracks will lead to detrimental tears on the belt while the conveyor works at high speeds. In order to detect mini-cracks in a timely manner, before the occurrence of large tears, a new mini-crack detection method for conveyor belts based on laser excited thermography is proposed. A laser beam is applied to generate a heat wave on the belt surface, so the corresponding thermal images can be recorded by an infrared camera. Then, an algorithm for extracting and fusing the features of mini-crack belt’s thermal images is firstly proposed by using time sequence analysis. It could transform multiple sequential thermal images into a single thermal image according to the frame difference method, so that the infrared thermal response of the mini-crack over time could be recorded quickly. To reveal the features of mini-crack, the power function image enhancement algorithm is proposed. After that, the threshold segmentation and Hough transform algorithm are used to determine the size of the mini-crack. The experimental results show that the mini-cracks with length of 50–140 mm, width of 1–10 mm, and depth of 5 mm can be successfully detected, and the detection accuracy could reach 96%. The detection results of different sizes of mini-crack show that the laser excited thermography has high damage sensitivity (1 mm diameter mini-crack detection), high accuracy (96%), lower power consumption (15 W laser excitation), and high SNR (signal-to-noise ratio).Fei ZengSheng ZhangTao WangQing WuMDPI AGarticlelaser excited thermographyrapid detectionmini-crackconveyor beltTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10766, p 10766 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	laser excited thermography rapid detection mini-crack conveyor belt Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	laser excited thermography rapid detection mini-crack conveyor belt Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Fei Zeng Sheng Zhang Tao Wang Qing Wu Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography
description	For a belt conveyor, a belt with mini-cracks influences the safety of the operation of the belt conveyor devices significantly. The lumpy material rubbing against a belt with mini-cracks will lead to detrimental tears on the belt while the conveyor works at high speeds. In order to detect mini-cracks in a timely manner, before the occurrence of large tears, a new mini-crack detection method for conveyor belts based on laser excited thermography is proposed. A laser beam is applied to generate a heat wave on the belt surface, so the corresponding thermal images can be recorded by an infrared camera. Then, an algorithm for extracting and fusing the features of mini-crack belt’s thermal images is firstly proposed by using time sequence analysis. It could transform multiple sequential thermal images into a single thermal image according to the frame difference method, so that the infrared thermal response of the mini-crack over time could be recorded quickly. To reveal the features of mini-crack, the power function image enhancement algorithm is proposed. After that, the threshold segmentation and Hough transform algorithm are used to determine the size of the mini-crack. The experimental results show that the mini-cracks with length of 50–140 mm, width of 1–10 mm, and depth of 5 mm can be successfully detected, and the detection accuracy could reach 96%. The detection results of different sizes of mini-crack show that the laser excited thermography has high damage sensitivity (1 mm diameter mini-crack detection), high accuracy (96%), lower power consumption (15 W laser excitation), and high SNR (signal-to-noise ratio).
format	article
author	Fei Zeng Sheng Zhang Tao Wang Qing Wu
author_facet	Fei Zeng Sheng Zhang Tao Wang Qing Wu
author_sort	Fei Zeng
title	Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography
title_short	Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography
title_full	Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography
title_fullStr	Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography
title_full_unstemmed	Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography
title_sort	mini-crack detection of conveyor belt based on laser excited thermography
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5e1a72df3f8a4d488cc75688556309b0
work_keys_str_mv	AT feizeng minicrackdetectionofconveyorbeltbasedonlaserexcitedthermography AT shengzhang minicrackdetectionofconveyorbeltbasedonlaserexcitedthermography AT taowang minicrackdetectionofconveyorbeltbasedonlaserexcitedthermography AT qingwu minicrackdetectionofconveyorbeltbasedonlaserexcitedthermography
_version_	1718413079047307264

Mini-Crack Detection of Conveyor Belt Based on Laser Excited Thermography

Ejemplares similares