Capacitive Displacement Transducer
A capacitive displacement sensor operates by converting physical displacement (distance change) into variations in capacitor capacitance. The measurement circuit then transforms these capacitance changes into standard electrical signals (e.g., voltage, current, or frequency) for output, enabling precise displacement calculation. The sensor consists of two flat electrodes, one for sensing and the other for the target object. When a constant alternating current flows through the sensor, the amplitude of the alternating voltage changes directly proportional to the distance between the capacitor plates. By utilizing the capacitor formed between the probe and the conductive target, the physical distance change is converted into a capacitance variation. This variation is detected and linearized through precision electronic circuits, ultimately producing a standard signal proportional to the distance.
