CM12
Description:
The inductive surface of a capacitive sensor consists of two coaxial metal electrodes, much like an "open" capacitive electrode, which form a capacitor that is connected in series within the RC oscillation loop. When the power supply is on, the RC oscillator does not oscillate, and when a target is close to the electrode of the capacitor, the capacity of the capacitor increases, causing the oscillator to start oscillating. Through the processing of the post-stage circuit, the two signals of stop vibration and oscillation are changed into switching signals, so as to detect the existence of objects. The sensor can detect both metal objects and non-metal objects, and can obtain a large operating distance for metal objects. The operating distance for non-metal objects depends on the number of dielectric constants of the material. The greater the dielectric constant of the material, the greater the operating distance can be obtained.
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