Abstract:
This study reports the design of metal plate thickness sensor based on Eddy Current principal in the
form of planar coil that could work without direct contact on the object. The principle used in the Eddy
Current sensor is a change of coil mutual inductance due to the presence of object in the magnetic
field. The coil is made up of double layered coil with angle variation between each layer designed
using and EAGLE Autodesk software based on FR-4 printed circuit board (PCB) material with the
number of turn (n) 24 turn, 31.4 mm outer diameter, and 2 mm inner diameter. Coil inductance
evaluation are carried out using LDC 1000 EVM which converts inductance values to digital data.
The smallest inductance (L) value obtained from 45º coil of L = 47,93 μH and the highest inductance
value obtained from double layered coil without angle variation of L = 53,12 μH which obtained using
Aluminium metal plate with 1 mm thickness as the test object.
