Position
can be determined via one of two ways—either by determining
‘distance’ (the length of separation between two points) or by
‘rotation’ (angular movement). Sensors that are positional in
nature can detect the movement of an object using linear sensors that
employ the distance method or through rotational sensors that compute
for rotation.
One
type of positional sensor is the “Linear Variable Differential
Transformer (LDVT), an inductive-type sensor that functions similar
to the AC transformer when it comes to measuring movement. A common
type of inductive positional sensor is the Eddy current sensor, which
is mainly used to detect objects in close proximity. Due to this
characteristic, Eddy sensors earned the more popular moniker
‘proximity sensors’.
