### Uncovering The Magic Behind Strain Gauges

Dated : 01-Feb-2023

Category : Education

# Uncovering the Magic Behind Strain Gauges

## Introduction

Strain gauges are one of the most widely used instruments in the field of engineering today. They are used to measure strain on an object, which is defined as a change in the shape or size of the object due to an applied force. In order to understand how strain gauges work, it is important to first understand the principle of strain on which it is based. In this blog post, we will explore the basics of strain, how it is measured, and how strain gauges work on the principle of strain.

## What is Strain?

Strain is defined as the deformation of an object due to an applied force. The amount of strain on an object is determined by the magnitude of the force, as well as the material properties of the object. Strain is expressed as a fraction or percentage of the original length of the object. For example, if an object is stretched from a length of 1m to a length of 1.1m, the strain on the object would be 0.1m/1m, or 10%.

## How is Strain Measured?

There are various methods for measuring strain, but the most common method is by using strain gauges. Strain gauges are a type of sensor that is attached to an object in order to measure the strain on the object. Strain gauges are typically made of a thin, metallic foil or wire that is bonded to the object. As the object is subjected to a force, the strain gauge will measure the change in the shape or size of the object and convert it into an electrical signal.

## How Does a Strain Gauge Work on the Principle of Strain?

Strain gauges work on the principle of strain, which is the deformation of an object due to an applied force. The strain gauge is attached to the object and as the object is subjected to a force, the strain gauge will measure the change in the shape or size of the object and convert it into an electrical signal. The electrical signal is then used to calculate the strain on the object. The strain gauge consists of two parts: a sensing element and a bridge circuit. The sensing element is made of a thin, metallic foil or wire that is bonded to the object, and the bridge circuit is an arrangement of resistors that is used to convert the strain into an electrical signal. As the object is subjected to a force, the strain gauge will measure the change in the shape or size of the object and convert it into an electrical signal. The electrical signal is then used to calculate the strain on the object.

## Conclusion

Strain gauges are an essential tool in the field of engineering and are used to measure strain on an object. In order to understand how strain gauges work, it is important to first understand the principle of strain on which it is based. Strain is the deformation of an object due to an applied force, and it is measured using strain gauges. Strain gauges work on the principle of strain and consist of a sensing element and a bridge circuit. The sensing element is made of a thin, metallic foil or wire that is bonded to the object, and the bridge circuit is an arrangement of

Engineering