Modeling and simulation analysis of eddy current sensor

A type of waterproof electronic digital calipers is devised using eddy current displacement sensor.A 3 D electromagnetism model of the hollow planar windings is simulated and analized with finite element analysis software ANSYS.The mathematic model of the eddy current sensor featuring a hollow planar winding is established.The winding is disassembled to multple conductors,which are simulated respectively and indepedently,and combined finally.In the end, the model is tested to show simulation result is in good agreement with the nature of actual sensor.The result will provide useful analysis method for eddy current sensor to be applied practically.