Eddy Current Inspection of Components With Complex Geometries

Plotnikov, Yuri; Wang, Changting; McKnight, W.; Suh, Ui

doi:10.1063/1.2902683

Cited by 3 publications

(2 citation statements)

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“…Given the space constraints of the pack installation, a new technology for cell expansion measurement was needed. GE had previously developed a flat coil eddy current (EC) sensor, which leveraged the manufacturing processes of electronic packaging for the inspection of jet engines [14] and initial results for the measurement of cell expansion was reported [15]. The design of this sensor allows for the integration of the temperature sensor manufacturing process with that of the eddy current sensor.…”

Section: Sensor Integrationmentioning

confidence: 99%

Fabrication of Multimeasurand Sensor for Monitoring of a Li-Ion Battery

Knobloch

Kapusta

Karp

et al. 2018

Journal of Electronic Packaging

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This paper details the fabrication and testing of a combined temperature and expansion sensor to improve state of charge (SOC) and state of health (SOH) estimation for Li-ion batteries. These sensors enable the characterization of periodic stress and strain changes in the electrode materials of Lithium-ion batteries during the charge and discharge process. These ultrathin sensors are built on a polyimide substrate which can enable direct integration between cells without compromising safety or cell cooling design. Leveraging the sensor design and fabrication process used to create inductive coil eddy current (EC) sensors for crack detection, these sensors were characterized on three Panasonic 5 A-h cells showing the capability to measure expansion of Li-ion batteries. By sensing the intercalation effects, which cause cell expansion, improvements in estimation of SOH and SOC can be enabled through the use of physics-based battery models, which combine the thermal, mechanical, and electrochemical aspects of its operation.

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Section: Sensor Integrationmentioning

confidence: 99%

Fabrication of Multimeasurand Sensor for Monitoring of a Li-Ion Battery

Knobloch

Kapusta

Karp

et al. 2018

Journal of Electronic Packaging

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“…Since the EC array probe fits the profile of the oil tubes, manipulation is easy and the lift-off is kept constant improving signal quality [3,4] . C-scan displays assist the analysis and help locate the defect by dividing the inspected tube surface into a small grid [5] .…”

Section: Introductionmentioning

confidence: 99%

Eddy Current Array Instrument and Probe for Crack Detection of Aircraft Tubes

Liu

Luo

Zhongqing

et al. 2010

2010 International Conference on Intelligent Computation Technology and Automation

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Failure of aircraft tubes inspections is decidedly hazardous. However, conventional eddy current testing for tubes is very time-consuming. Eddy current array technology can dramatically decrease the inspection time by reducing to one the number of rotations needed to completely cover the tube surface. A new eddy current array instrument and probe was presented, the ECA imaging principle and the hardware frame of the system was described. By means of FEM simulation, optimize the parameter of the eddy current array probe. Based on the instrument and probe, the aircraft oil deliver EDM north with an axial crack was detected. The experimental results show that not only the instrument and probe are able to identify the existence of cracks quickly and effectively, but also estimate the location of cracks. Further studies have shown that the inspection resolution is the length of cracks with tolerance ±2 mm and the depth of cracks with tolerance ±20%.

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