Lvdt Transducer (Series-Opposed); Settings Of The Transducer; Fig. 9-4: Lvdt Transducer (Series-Opposed) - Addi-Data APCI-3701 Technical Description

Functions of the board

9.5.2 LVDT transducer (Series-opposed)

The series-opposed transducer features 3 inductive coils, one primary coil and 2
secondary coils. These coils are positioned concentrically around the mobile core
and form two symmetrical transformers with respect to the electrical zero point of
the transducer. The primary coil is fed by 2 sinusoidal voltage signals (a positive
and a negative one) whereas both secondary coils (switched in phase opposition)
produce an electrical signal proportional to the measured displacement.

9.5.3 Settings of the transducer

A transducer features different properties which are important for configuring the
board:
the nominal frequency F in Hz
-
the nominal voltage V in V
-
the sensitivity S in mV/V/mm
-
the measuring range d
-
the load R
-
According to these values, the settings parameters are programmed for adapting
the board to the connected transducer (See 9.2.2: board settings).
44

Fig. 9-4: LVDT transducer (Series-opposed)

rms
in mm (± d
max
load
)
max
APCI-3701