A whetstone bridge configuration of two strain gauges compen

A whetstone bridge configuration of two strain gauges compensates for the system temperature sensitivity . True or false?

Solution

A whetstone bridge configuration of two strain gauges compensates for the system temperature sensitivity : This statement is True

All strain-gauge configurations are based on the concept of a Whetstone bridge. A Whetstone bridge is a network of four resistive legs. One or more of these legs can be active sensing elements. Figure 1 below, shows a Wheatstone bridge circuit diagram.

Figure 1. Basic Whetstone Bridge Circuit Diagram

The Whetstone bridge is the electrical equivalent of two parallel voltage divider circuits. R₁ and R₂ compose one voltage divider circuit, and R₄ and R₃ compose the second voltage divider circuit. The output of a Whetstone bridge is measured between the middle nodes of the two voltage dividers.

A physical phenomenon, such as a change in strain applied to a specimen or a temperature shift, changes the resistance of the sensing elements in the Whetstone Bridge. The Whetstone bridge configuration is used to help measure the small variations in resistance that the sensing elements produce corresponding to a physical change in the specimen.