What is inductive sensing?
Inductive sensing measures the interaction of an electromagnetic field with surrounding metallic materials. The mechanics of inductive sensing begin with a standard reference signal being transmitted through a drive coil. Adjacent sensing coils monitor the resultant electromagnetic force (EMF) field. This EMF field is distorted in a predictable and repeatable way by its proximity to certain metals. Therefore, if a scale with cyclic physical properties is introduced into the magnetic field, the position of the sensing head along the scale can be precisely determined by observing the electromagnetic field’s reaction. The LN linear encoder combines inductive sensing technology with a stainless steel scale, internal nickel-chrome ball bearings and a sealed IP67 rated read head. The read head performs the sensing of the cyclic distortion in the EMF. An onboard digital signal processor (DSP) analyzes these distortions and calculates the absolute position of the read head. The DSP then transl
