©
National Instruments Corporation
27
SCC-SG Series Strain-Gauge Modules User Guide
Figure 21.
Full-Bridge Type I Rejecting Axial and Measuring Bending Strain
A full-bridge type I configuration has the following characteristics:
•
Four active strain-gauge elements. Two are mounted in the direction of
bending strain on one side of the strain specimen (top), the other two
are mounted in the direction of bending strain on the opposite side
(bottom).
•
Highly sensitive to bending strain.
•
Rejects axial strain.
•
Compensates for temperature.
•
Compensates for lead resistance.
•
Sensitivity at 1000
µε
is
∼
2.0 m
V
OUT
/
V
EX
input.
•
Used with the SCC-SG04/24.
Full-Bridge Type II
This section provides information for the full-bridge type II strain-gauge
configuration. The full-bridge type II only measures bending strain.
Figure 22.
Full-Bridge Type II Rejecting Axial and Measuring Bending Strain
R
2
R
1
R
4
R
3
Axial
Bending
R
2
(+ )
R
1
(– )
R
4
(+ )
R
3
(– )
R
2
R
1
R
4
R
3
R
4
(+ )
R
1
(– )
R
3
(– )
R
2
(+ )
Axial
Bending
