Back to Search
Start Over
Numerical Simulation and Experimental Study of Capacitive Imaging Technique as a Non-Destructive Testing Method
- Source :
- Applied Sciences, Volume 11, Issue 9, Applied Sciences, Vol 11, Iss 3804, p 3804 (2021)
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- It was recently demonstrated that a co-planar capacitive sensor could be applied to the evaluation of materials without the disadvantages associated with the other techniques. This technique effectively detects changes in the dielectric properties of the materials due to, for instance, imperfections or variations in the internal structure, by moving a set of simple electrodes on the surface of the specimen. An AC voltage is applied to one or more electrodes and signals are detected by others. This is a promising inspection method for imaging the interior structure of the numerous materials, without the necessity to be in contact with the surface of the sample. In this paper, Finite Element (FE) modelling was employed to simulate the electric field distribution from a co-planar capacitive sensor and the way it interacts with a non-conducting sample. Physical experiments with a prototype capacitive sensor were also performed on a Plexiglas sample with sub-surface defects, to assess the imaging performance of the sensor. A good qualitative agreement was observed between the numerical simulation and experimental result.
- Subjects :
- coplanar sensor
Technology
Materials science
FE modeling
QH301-705.5
QC1-999
Capacitive sensing
Acoustics
NDT techniques
02 engineering and technology
Dielectric
01 natural sciences
Electric field
Nondestructive testing
0103 physical sciences
General Materials Science
Biology (General)
Instrumentation
QD1-999
automotive_engineering
defects
010302 applied physics
Fluid Flow and Transfer Processes
capacitive sensing
Computer simulation
business.industry
Process Chemistry and Technology
Physics
General Engineering
021001 nanoscience & nanotechnology
Engineering (General). Civil engineering (General)
Sample (graphics)
Finite element method
Computer Science Applications
Chemistry
Imaging technique
TA1-2040
0210 nano-technology
business
Voltage
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Applied Sciences, Volume 11, Issue 9, Applied Sciences, Vol 11, Iss 3804, p 3804 (2021)
- Accession number :
- edsair.doi.dedup.....fde119c4379d4a7e7b2616d2ac098b54