Magnetic images of surface crack on heated specimen using an area-type magnetic camera with high spatial resolution

Hwang, Jiseong; Kim, Jungmin; Lee, Jinyi

doi:10.1109/imtc.2009.5168701

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…Due to the high importance of this type of detection, it has attracted the attention of many scientists and researchers in the field, mostly for crack detection in the pipes that are subject to high temperature [1]. Image analysis techniques were also used to detect welding defects in pipelines [2], as recently proposed thermal image analysis system for nondestructive tests (NDT), during thermal stress tests [3].…”

Section: Cracks Detection By Use Of a Camera Systemmentioning

confidence: 99%

Pipe Cracks Detection Methods – A Review

2018

IJOMAM

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A comparison between the most important methods for crack detection during external inspection of the pipes is presented. It is meant to choose the best suited one for robotic devices, aimed to perform the pipelines monitoring, because they are often under the action of the environmental stress factors, like high-temperature variation, especially met in the Middle East countries. As a native from the Republic of Iraq, the first author currently works at development of a robot for external inspection of pipes, within his PhD thesis, in order to provide full care to the pipelines, because they are non-replaceable. This way, their performance and reliability can improved and the production stopping is prevented.

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Section: Cracks Detection By Use Of a Camera Systemmentioning

confidence: 99%

Pipe Cracks Detection Methods – A Review

2018

IJOMAM

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“…A variety of approaches have been used, like the propagation of ultrasounds that is used in [10] to detect cracks and lamination defects in metallic pipes, or Eddy currents [11][12][13]. Other methods exploit magnetic cameras to detect cracks in parts that are at high temperature [14], or magnetic flux leakage [15], while the method described in [16] studies the heat produced by the Joule effect.…”

Section: State Of the Artmentioning

confidence: 99%

A thermographic visual inspection system for crack detection in metal parts exploiting a robotic workcell

Ghidoni

Antonello

Nanni

et al. 2015

Robotics and Autonomous Systems

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Cracks are the main source of failure in the production of metal parts: systems for checking their presence are therefore crucial for defect-free production. In this paper, an autonomous system for performing this quality control is presented. The system is equipped with a heating tool, a thermocamera, and a robot to handle the part. The inspection process is based on the observation of the propagation of thermal waves through the inspected part, a method that can highlight very small cracks with high reliability. A knowledge-based approach to visual inspection is exploited for detecting the cracks: all the system parameters are known by means of an accurate calibration of the workcell. The system was tested on a large dataset and demonstrated its capability of detecting tiny production defects, that can lead to dangerous failures when the metal components are put under strong mechanical stress

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“…The system can detect smallest cracks of a hole-type with 0.25 mm radius and 1.0 mm depth. Lee and Hwang, et al [17], [18] also applied different methods to improve the detection probability of the far-side crack by using 1/4 RMS algorithm and inspected specimen at high temperature using a high spatial resolution magnetic camera. Jun,et al [19] proposed a hand-held magnetic camera system for inspecting crack on aluminium alloy.…”

Section: Introductionmentioning

confidence: 99%

Magnetic camera for visualizing magnetic fields of home appliances

Tuan

Souza-Daw

Phuong

et al. 2014

2014 IEEE Fifth International Conference on Communications and Electronics (ICCE)

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Household appliances need to meet electromagnetic compatibility standards. We have developed a system to detect, observe and monitor magnetic field strength generated from electrical components and household appliances. The system comprises of an array of Hall Effect sensors, a video camera and a computer. Using the proposed system, magnetic field strength of tested device can be captured and displayed in a three dimensional surface map. Several examples are demonstrated to capture and observe the magnetic field strength of tested devices.

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Magnetic images of surface crack on heated specimen using an area-type magnetic camera with high spatial resolution

Cited by 8 publications

References 3 publications

Pipe Cracks Detection Methods – A Review

Pipe Cracks Detection Methods – A Review

A thermographic visual inspection system for crack detection in metal parts exploiting a robotic workcell

Magnetic camera for visualizing magnetic fields of home appliances

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