Ceramic capacitors Form capacitive proximity switches

Capacitors, usually referred to as their ability to hold charge, are capacitors and are devices that hold the charge. Capacitors are one of the large quantities of electronic components used in electrical equipment, widely used in circuits in the cross-pass, coupling, bypass, filtering, tuning circuit, control and so on, any two insulated and very close to each other conductor (including wire) between the composition of a capacitor. Ceramic capacitors are essential components in capacitive proximity switches, so what does it do? How does it work?

Don't worry, here's the answer for you. The measuring end of the ceramic capacitive proximity switch is a plate that makes up the capacitor, while the other plate is the shell of the switch.

When an object is moved to a capacitive proximity switch, whether or not the object is conductive, because its dielectric constant will always be different from the original environmental medium so that the ceramic capacitance changes, so that the switch internal circuit parameters change, thus identifying whether the object is close, and then control the switch through or off. Ceramic capacitive Proximity Switch working principle is that when the power supply is switched on, the RC oscillator does not oscillate, when a target toward the capacitor's electricity close, the capacitor capacity increases, the oscillator began to oscillate.

Through the processing of the rear circuit, the two signals of vibration and oscillation are converted into the sensor surface of the switching signal capacitive proximity switch, which is composed of two coaxial metal electrodes, and two electrodes constitute one by one capacitors, which are concatenated in the RC oscillation circuit, thus playing the goal of detecting the existence of any object. If you have technical questions can contact us, we strive to solve for you.