The working principle of eddy current sensor is as follows:
The probe of eddy current sensor is controlled by a small coil and the controller generates a vibrating electromagnetic field. When approaching the measured body, the induced current will be generated on the surface of the measured body and the reverse electromagnetic field will be generated. At this time, the eddy current sensor judges the distance between the measured body and the measured body according to the strength of the reverse electromagnetic field.
The characteristics of eddy current sensor are as follows:
In the state analysis, vibration research and measurement of high-speed rotating machinery and reciprocating motion machinery, the non-contact high-precision vibration and displacement signals can continuously and accurately acquire a variety of parameters of rotor vibration state. Such as the radial vibration, amplitude and axial position of the shaft. From the theoretical analysis of rotor dynamics and bearing science, the motion state of large-scale rotating machinery mainly depends on its core-rotating shaft. Eddy current sensor can directly and non-contact measure the state of rotating shaft. It can provide key information for early determination of mechanical problems such as rotor imbalance, misalignment, bearing wear, shaft crack and friction.
