HBM Spider8 - Inductive Transducers; Inductive Full Bridge

9
15
1
8
15-pin socket
D-17
Connecting Ý Connecting transducers
Spider8
3.2 Inductive transducers
Connection to carrier-frequency module SR55
3.2.1 Inductive full bridge
Inductive transducers - whether half bridge or full bridge - are
passive transducers with the following features:
• The transducers must be supplied with an excitation voltage
(carrier-frequency)
• They are inductive half bridges
• A transducer is characterised by the following data
- Nominal displacement (e.g. 20mm)
- Nominal sensitivity (e.g. 10mV/V)
Typical inductive transducers are displacement transducers.
8
15
5
13
12
6
wh
rd
bk
bu
gn
gy
Measurement signal
Bridge excitation
voltage
Sensor circuit
Sensor circuit
Bridge excitation
voltage
Measurement signal
1
4
2
3
3’
2’
Inward core movement: display +
outward core movement: display -
15-pin socket