Operating Instructions MBI 46.51.39
Version 0.9
en MBI 46.51.39 operating instructions.docx
Issue: 08/2022
page 10 from 29
Figure 2
amplifier with differential transformer
4.3.3 Long-stroke sensors (eddy current principle)
Long-stroke displacement transducers are sensor using a half-bridge circuit in which only one
coil is used as a measuring coil and the second coil is designed in a space-saving replacement
circuit. A movable measuring tube changes the impedance of the measuring coil according to
the eddy current principle. In contrast to the symmetrical displacement transducers, the electric
zero point is located at the beginning of the nominal measuring range where the tube is placed
all the way onto/across the measuring coil.
Figure 33
Measure amplifier with long-stroke displacement transducer
U
A
U
SP
U
Mess
-s
0
+s
Tauch
-
anker
0 V
°
Oszillator
Prinzipschaltbild TF-
Verstärker
°
°
B
A
B
AMP
Filter
A
°
°
Oszillator
°
°
U
A
0 V
Prinzipschaltbild TF-
Verstärker
°
°
U
SP
U
Mess
0
+s
Mantel-
anker
AMP
Filter
A
B
A
B
