Mts Axial Extensometers Manual do Utilizador descarregar pdf (Página 18)

Introduction

About Wheatstone Bridge

The axial transducer uses precision, resistance-type, foil strain gages

bonded to a metallic element to form a Wheatstone bridge. Two knife

edges on the transducer arms contact the specimen. Elongation or

compression of the specimen causes movement of the transducer arms.

This movement bends the metallic element, changing the resistance of

the strain gages. The change in the balance of the Wheatstone bridge

produces an electrical output that is proportional to the displacement of

the transducer arms.

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Excitation

Sensor

Bridge

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Mts Axial Extensometers Manual do Utilizador Página 18