Principle Of Inductive Proximity Sensor

The composition of the inductive proximity sensor is more complicated, which are high-frequency oscillator, amplifier, detection circuit, trigger circuit and output circuit. At the beginning, the high-frequency oscillator will induce electromagnetic field on the detection surface of the sensor. At this time, there is no metal object nearby, so the circuit will be in an oscillating state. However, as the metal object slowly approaches, the eddy current generated by the metal also Will gradually absorb the energy generated by the high-frequency oscillator, and until the vibration stops, the changes in the two types of oscillation states of the high-frequency oscillator can be converted into electrical signals, and they will be converted into electrical signals after detection and amplification. The binary signal is then output through power amplification.