Inductive proximity sensor operation circuit

Published:2011/5/5 2:14:00 Author: | Keyword: Inductive proximity sensor, operation | From:SeekIC

Inductive proximity sensor operation circuit Proximity sensor is a kind of device which can perceive objects close to it . It uses sensibility of the displacement sensors to the objects nearby to identify objects and output switching signals. Therefore, proximity sensors are often referred to asproximity switches. Inductive proximity sensor is a asproximity switch using vortex to percept objects . It consists of high-frequency oscillation circuit, detection circuit, amplifier, shaping circuit and output circuit, as shown in Figure 26-36. Perception sensor is as detection coil, which is an integral part of the oscillation circuit. In the work surface of the detection coil, there is an alternating magnetic field. When metal objects approach the detection coil, the metal objects will produce vortex and absorb the vibration energy, until vibration is reduced till to stop. And vibration and stop these two states will be output as switching signals.



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