Eddy current sensor can be static and dynamically non-contact, high linearity, high resolution measurement of metal conductor measured distance from the probe surface. It is a non-contact linear measuring tool. Eddy current sensor can be measured accurately measure body (must be a metal conductor) and the static and dynamic between the probe end relative displacement. High-speed rotating machinery and reciprocating motion mechanical state analysis, vibration study, analytical measurement, the pair of high-precision non-contact vibration, displacement signal, can be collected continuously and accurately to the rotor vibration state of the various parameters.Eddy current sensor system is widely used in electric power, petroleum, chemical, and metallurgical industries and some scientific research units. On the turbine, turbine, blower, compressor, air extension, gear boxes, large cooling pumps and other large rotating machinery shaft radial vibration, axial displacement, the key phase detector, shaft speed, differential expansion, eccentricity, and rotor dynamics and parts dimensional inspection, etc. online measurement and protection.
This paper from the basic eddy current sensor measuring principle, it applied the finite element method, through modeling, the definition of material properties, meshing, set the boundary conditions, loading and solving, etc., on the eddy current sensor for electromagnetic field simulation.
The main contents of this paper:
1.Describes the development of the sensor, the background and the topics of this paper. 2.Structure and principle of eddy current sensor description. 3.Obtained by finite element simulation, testing coil shape changes, the measured changes in the magnetic permeability and the detection coil and the measured changes in body position between the eddy current sensor. 4.Finite element simulation to avoid complicated calculations, on the design of eddy current sensor is important.
Keywords: Eddy current sensors element sensitivity linear degrees electromagnetic field
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