Linear Inductance-L Transducer
L2DT is a sensor of which inductance changes with displacement of the copper sleeve covering a sensor probe. 10kHz sine wave excites the solenoid coil of the L2DT sensor. It generates the short ring effect as a copper sleeve covers a sensor probe. The magnetic flux of the short ring effect makes decrease inductance of solenoid coil. When the copper sleeve covers the whole sensor probe, the short ring effect is the strongest and the value of inductance becomes the smallest. Calculating the change of this inductance, it is possible to detect the position of a copper sleeve.