VTI Instruments Corp.
46
EX1629 Basic Operation
The full-bridge strain conversion is calculated according to:
sense
-
sense
diff
V
V
V
excitation
unstrained
diff
V
V
V
V
r
GF
V
r
Setting this conversion automatically configures the input path for full-bridge mode, in which the
completion resistor is shorted and the back-half resistors are disconnected. This configuration is
illustrated in Figure 2-5.
Full-Bridge Poisson
This conversion applies to the following bridge configuration:
+
+
–
+
–
+
–
–
V
OUT
V
EXC
F
IGURE
3-6:
F
ULL
-B
RIDGE
P
OISSON CONFIGURATION
The full-bridge strain conversion is calculated according to:
sense
-
sense
diff
V
V
V
excitation
unstrained
diff
V
V
V
V
r
1
1
2
r
r
V
GF
V
Setting this conversion automatically configures the input path for full-bridge mode, in which the
completion resistor is shorted and the back-half resistors are disconnected. This configuration is
illustrated in Figure 2-5.
Full-Bridge Bending Poisson
This conversion applies to the following bridge configuration:
+
+
–
+
–
+
–
–
V
OUT
V
EXC
F
IGURE
3-7:
F
ULL
-B
RIDGE
B
ENDING
P
OISSON
C
ONFIGURATION
Содержание EX1629
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