Thermal cameras and applications: a survey

Gade, Rikke; Moeslund, Thomas B.

doi:10.1007/s00138-013-0570-5

Cited by 585 publications

(298 citation statements)

References 162 publications

(69 reference statements)

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“…IR thermal cameras are one of the sensing technologies utilized in laser welding applications to capture the temperature distribution to the welded component. Thermal cameras are passive sensors that imprint the infrared radiation, emitted by all objects with a temperature above absolute zero [24]. Today, the thermal imaging monitoring systems, as it is mentioned in [25], are more and more implemented into industry, due to the fact that they offer many advantages over other techniques used for detection of the weld pool temperature.…”

Section: Thermalmentioning

confidence: 99%

Quality assessment in laser welding: a critical review

Stavridis

Papacharalampopoulos

Stavropoulos

2017

Int J Adv Manuf Technol

171

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Quality assessment methods and techniques for laser welding have been developed both in-and post-process. This paper summarizes and presents relevant studies being classified according to the technology implemented (vision, camera, acoustic emissions, ultrasonic testing (UT), eddy current technique (ECT)) for the quality inspection. Furthermore, the current review aims to map the existing modeling approaches used to correlating measured weld characteristics and defects with the process parameters. Research gaps and implications of the quality assessment in laser welding are also described, and a future outlook of the research in the particular field is provided.

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Section: Thermalmentioning

confidence: 99%

Quality assessment in laser welding: a critical review

Stavridis

Papacharalampopoulos

Stavropoulos

2017

Int J Adv Manuf Technol

171

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“…Thermal radiation is emitted by objects with a temperature higher than absolute zero (-273 °C/0 K). The infrared radiation region is between visible light and microwaves within the wavelength spectrum of 0.78 -1000 μm [16,17]. …”

Section: Infrared Thermographymentioning

confidence: 99%

Comparison of two methods for contactless surface temperature measurement

Piasecka

Michalski

Strąk

2016

EPJ Web of Conferences

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Abstract. The aim of the paper is to determine the temperature filed of the heating surface on the basis of temperature measurements taken by liquid crystal thermography and infrared thermography applied in boiling heat transfer research during FC-72 flow in minichannels, and to compare them. The essential part of the experimental stand is the test section with two parallel rectangular minichannels, each 1.7 mm deep, 24 mm wide and 360 mm long. It is possible to observe the channel surfaces through panes: of the first minichannel allows observing foil temperature changes on the plain side due to liquid crystal thermography (LCT), which required treating the foil surface with thermochromic liquid crystals, of the other minichannel enables detecting outer glass or foil surface temperature changes due to infrared thermography (IRT). Comparison of the results of the measurements are presented in graphical form as thermographs and as heating surface temperature vs. minichannel length. The differences between two sets of measurement data concerning the temperature of the heating surface obtained with LCT and IRT, were analyzed using: Pearson linear correlation coefficient, determination coefficient, Experimental Method Error and Method Accuracy. The comparative data analysis shows that similar values and distributions of the surface temperature were obtained from both techniques.

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“…However, features are sparse in thermal images, and it might thus be more difficult to determine identities or distinguish between objects. An extensive review of thermal cameras in computer vision is found in [24]. When combined, RGB and thermal cameras extend the visibility of the road users and improves the robustness of traffic surveillance algorithms.…”

Section: Thermal-visible Intersection Data Setmentioning

confidence: 99%

Detecting Road Users at Intersections Through Changing Weather Using RGB-Thermal Video

Bahnsen

Moeslund

2015

Advances in Visual Computing

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Abstract. This paper compares the performance of a watch-dog system that detects road user actions in urban intersections to a KLTbased tracking system used in traffic surveillance. The two approaches are evaluated on 16 hours of video data captured by RGB and thermal cameras under challenging light and weather conditions. On this dataset, the detection performance of right turning vehicles, left turning vehicles, and straight going cyclists are evaluated. Results from both systems show good performance when detecting turning vehicles with a precision of 0.90 and above depending on environmental conditions. The detection performance of cyclists shows that further work on both systems is needed in order to obtain acceptable recall rates.

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Thermal cameras and applications: a survey

Cited by 585 publications

References 162 publications

Quality assessment in laser welding: a critical review

Quality assessment in laser welding: a critical review

Comparison of two methods for contactless surface temperature measurement

Detecting Road Users at Intersections Through Changing Weather Using RGB-Thermal Video

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