MTS Series 247 Actuators - Manual (Page 18)

Series 247 Actuators 18
Functional Description
Introduction
LVDT operation
The internally mounted LVDT
provides an indication of the
actuator piston rod position in its
displacement.
The LVDT is an electromechanical
device that provides an output
voltage which is proportional to the
displacement of a moveable core
extension. The core extension is
mounted inside the hollow piston
rod and moves as the piston rod
moves. The LVDT coil is secured to
the pedestal base by a locking
collar. The core extension is
positioned in the LVDT coil to
provide a zero reference point, and
is locked in place with a locking
setscrew.
As the piston rod moves during
operation, the output voltage from
the LVDT indicates how far the
piston rod has moved from the zero
reference point.
Retainer
Core
LVDT Core
Extension
Hollow
Piston Rod
LVDT Coil
Locking Collar
LVDT
Connector