Venitusmõõtur

Venitusmõõtur, also known as a strain gauge, is a sensor used to measure strain or deformation in an object. It works by detecting changes in electrical resistance that occur when the material to which it is attached is stretched or compressed. A typical venitusmõõtur consists of a thin, flexible backing material with a metallic foil pattern etched onto it. This foil pattern acts as the resistive element. When the object under test deforms, the backing material and the foil also deform, causing the foil to stretch or compress. This change in physical dimensions alters the electrical resistance of the foil.

The venitusmõõtur is bonded to the surface of the object being measured using a specialized adhesive. As the object deforms, the strain gauge deforms with it. This deformation causes a proportional change in the electrical resistance of the strain gauge. This change in resistance is typically very small and is measured using a Wheatstone bridge circuit. The output of the bridge is then amplified and processed to provide a reading of the strain.

Venitusmõõturid are widely used in various engineering applications, including structural testing, stress analysis, load cell manufacturing, and experimental mechanics. They are crucial for understanding how materials and structures behave under different forces and conditions, enabling engineers to design safer and more efficient products and systems. The accuracy and sensitivity of a venitusmõõtur depend on factors such as its construction, the material of the resistive element, and the method of attachment.