The Wheatstone bridge circuit shown in Fig. 5.10a can be redrawn as in Fig. 5.10b, which shows that the full bridge is made up of two voltage-divider circuits. These circuits are commonly used for static and dynamic strain measurements.
|Fig 5.10 (a) Wheatstone bridge circuit. |
(b) The Wheatstone bridge circuit redrawn as two voltage-divider circuits.
The strain-induced incremental output voltage E0, corresponding to changes in resistance of the four arms, is given by
CLICK TO ENLARGE BELOW IMAGES
|Figure 5.11 (a) A simple cantilever-type summing device. (b) A complex summing device.|