Sketch DC signal conditioning circuit for pressure measurement using strain gauge. Justify it.

Sketch DC signal conditioning circuit for pressure measurement using strain gauge. Justify it.
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1 Answer

Answer :

Diagram:

image

Figure: DC signal conditioning circuit for pressure measurement using strain gauge

Where, Rg= strain gauge resistance.

Explanation:

In order to measure strain with a bonded resistance strain gauge, it must be connected to an electric circuit called as wheatstone bridge.

It is capable of measuring the minute changes in resistance corresponding to strain.

Strain gauge transducers usually employ four strain gauge elements that are electrically connected to form a Wheatstone bridge circuit.

The Figure shows a typical strain gauge diagram.

A Wheatstone bridge is a divided bridge circuit used for the measurement of static or dynamic electrical resistance.

The output voltage of the Wheatstone bridge is expressed in millivolts output per volt input. The Wheatstone circuit is also well suited for temperature compensation.

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