Detection Principle of Inductive Proximity Sensor
Through the influence of external magnetic field, the magnetic loss caused by eddy current on the surface of conductor is detected. The alternating current magnetic field is generated in the detection coil, and the impedance change caused by the eddy current generated by the metal body is detected.
In addition, as an alternative method, it includes an aluminium sensor for detecting frequency and phase components, and an all-metal sensor for detecting only impedance components through a working coil.
The transformer state occurs on the surface of the detector and the sensor.