Bobbin-Type Solid-State Hall Sensor Array With High Spatial Resolution for Cracks Inspection in Small-Bore Piping Systems

Lee, Jinyi; Jun, Jongwoo; Kim, Jungmin; Choi, Hoyoon; Le, Minhhuy

doi:10.1109/tmag.2012.2199472

Cited by 22 publications

(15 citation statements)

References 3 publications

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“…L ¼ À0:472lnP þ 1:552 ð Þ w À 0:426lnP þ 9:78 (9) To compare this with the experimental results obtained using a BMC, the obtained voltages must be converted into magnetic intensity readings; fortunately, Hall sensors exhibit a linear relationship between the output voltage (V H ) and the input magnetic intensity (B z ) as given by Eq. (10).…”

Section: Resultsmentioning

confidence: 99%

“…Figure shows an image of a scanning system that uses the BMC to inspect cracks in a small‐bore copper pipe . The bobbin sensor shown is composed of 32 × 32 InSb Hall sensors arranged in a matrix with 0.78‐mm spatial resolution and bent onto a wafer with a minimum diameter of 15 mm.…”

Section: Principle and Algorithmmentioning

confidence: 99%

“…In the following section, we introduce the camera used in the scanning system and apply the DM on various types of cracks in a pipe. Figure 1 shows an image of a scanning system that uses the BMC to inspect cracks in a small-bore copper pipe [9,10]. The bobbin sensor shown is composed of 32 × 32 InSb Hall sensors arranged in a matrix with 0.78-mm spatial resolution and bent onto a wafer with a minimum diameter of 15 mm.…”

Section: Principle and Algorithmmentioning

confidence: 99%

“…To overcome the shortcomings of such systems, Lee et al . have been developing a bobbin‐type magnetic camera (BMC) that uses high spatial resolution matrix Hall sensors in the sensor probe and has a high imaging speed . In one assessment, 32 × 32 Hall sensors were arrayed in a matrix with a spatial resolution of 0.78 mm and an imaging speed of approximately one frame/second.…”

Section: Introductionmentioning

confidence: 99%

“…As inspected pipelines are usually long and have small diameters, NDT systems such as a bobbin probes [1,[3][4][5], motorized rotating pancake coils (MRPCs) [1,4], or X-probes [1,[5][6][7][8] must be inserted; however, such NDT systems may be complicated (as is the case with MRPCs) or have low spatial resolution (bobbin and X-probes). To overcome the shortcomings of such systems, Lee et al have been developing a bobbin-type magnetic camera (BMC) that uses high spatial resolution matrix Hall sensors in the sensor probe and has a high imaging speed [9,10]. In one assessment, 32 × 32 Hall sensors were arrayed in a matrix with a spatial resolution of 0.78 mm and an imaging speed of approximately one frame/second.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Fast simulation of alternating magnetic fields around a crack in a pipeline system using a dipole model method

Kim

et al. 2014

Int J Numerical Modelling

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This study proposes a method for the fast simulation of the distribution of alternating magnetic fields around internal cracks as well as cracks on the inner and outer diameter surfaces of a pipe. This method, which uses a bobbin‐type magnetic camera to inspect cracks in small‐bore piping systems, is based on a dipole model, allowing for the rapid calculation and storage of data on the distribution of alternating magnetic fields around cracks from a sensor moving inside a pipe. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

Section: Principle and Algorithmmentioning

confidence: 99%

Section: Principle and Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fast simulation of alternating magnetic fields around a crack in a pipeline system using a dipole model method

Kim

et al. 2014

Int J Numerical Modelling

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Inspection of Both Inner and Outer Cracks in Aluminum Tubes Using Double Frequency Circumferential Current Field Testing Method

Yuan,

Li,

Zhao

et al. 2024

Recent Development of Alternating Current Field Measurement Combine With New Technology

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Aluminum and alloy tubes are widely used in industrial fields because of the advantage of good corrosion resistance, high thermal conductivity and light weight. Due to the stress corrosion cracking (SCC) and fatigue corrosion cracking (FCC), both inner and outer cracks generates in the aluminum tube. It is still a challenge to inspect all inner and outer surface cracks in the thick-wall aluminum tube in real time by one scan using the nondestructive testing (NDT) method. A double frequency circumferential current field testing (CCFT) method is presented for the inspection of both inner and outer cracks in the aluminum tube in a one pass scan. A simulation model is proposed to extract characteristic signals of inner and outer cracks at two excitation frequencies. The bobbin-type probe is developed and excited by the synthetic double frequency excitation signal. Both inner and outer cracks are tested by the double frequency CCFT system. Results show that both inner and outer cracks can be identified, distinguished and evaluated by the double frequency CCFT method in a one pass scan.

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Quantitative Evaluation of Corrosion in a Thin Small-Bore Piping System Using Bobbin-Type Magnetic Camera

Kim

et al. 2013

J Nondestruct Eval

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Bobbin-Type Solid-State Hall Sensor Array With High Spatial Resolution for Cracks Inspection in Small-Bore Piping Systems

Cited by 22 publications

References 3 publications

Fast simulation of alternating magnetic fields around a crack in a pipeline system using a dipole model method

Fast simulation of alternating magnetic fields around a crack in a pipeline system using a dipole model method

Inspection of Both Inner and Outer Cracks in Aluminum Tubes Using Double Frequency Circumferential Current Field Testing Method

Quantitative Evaluation of Corrosion in a Thin Small-Bore Piping System Using Bobbin-Type Magnetic Camera

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