Dynamometer

November 1, 2021

The dynamometer is a measuring instrument used in the area of ​​physics to measure forces or weight. It was invented in the 17th century by Isaac Newton, one of humanity’s most prominent physicists and inventors. This was based on Hooke’s law of elasticity, which states that the stretch suffered by an elastic material is proportional to the force applied to it.

The Dynamometer consequently with Hooke’s law measures the force based on the stretch suffered by the elastic material that it presents in its design. This separate instrument can measure weight but its operation should not be confused with that of a balance, but by definition, weight as a force exerted by gravity on an object is calculable by this method.

What is the Dynamometer?

The dynamometer has a spring inside a cylindrical structure, from which a ring protrudes at the upper end, where to hook the instrument to suspend it and at the lower end a hook where the object is hung to determine the weight / force. The cylinder contains a graduation marked to obtain the measurement data.

The operation of the dynamometer depends on the internal spring , which is stretched when a force is applied to it. Springs are elastic elements that can receive energy without permanently deforming. The springs used for the dynamometer are traction springs, that is, they support traction forces; These are the effort to which an object is subjected (in this case the spring) by having forces that go in the opposite direction exerted on it.

When the spring is stretched, the cylinder slider moves indicating the measurement. Physically, the spring has a constant, which depends on its qualities as the material from which it is made. The measurement shows the difference between what the spring measured before and after being subjected to traction; thus determining the force.

What is the Dynamometer for?

The dynamometer is a measuring instrument, which is used to measure the force and / or weight of a certain object. This is thanks to the fact that it detects the variations produced in it by the application of a force. It primarily determines forces and the dynamometer materials are tested to assess their resistance to deformation.

Measurements are made in units of force Newton (N), in which one Newton is represented as 1 kilogram-meter per second squared.

Dynamometer Uses

Despite measuring weight, the dynamometer is not used in the same way as balance weights and its usefulness is diversified through the different areas that use it. One of the main uses of the dynamometer is to measure forces and this is quite useful in the industrial sector, in fact it is required to make scales.

Its usefulness in the industrial sector is based on the verification of physical materials, such as metal, plastic, among others. For this, forces are exerted on said materials to determine their resistance to deformation; The dynamometer is used to measure the forces applied to the objects that are being studied in terms of their resistance and elasticity.

These results are used as official data and are required to work with the materials. For example, when manufacturing articles that need to have a good level of elasticity due to their functionality, it is the data from the dynamometer that provides this information.

Its use to test the resistance of materials is applied in many areas, to the point that in dentistry tests are done with the dynamometer to determine the force that supports the material with which the teeth are made and thus guarantee the safety of their use. .

Dynamometer Types

Over time, more and more instruments have been developed to give it greater degrees of precision, better functionality, and even adapt them to needs that arise from the same advance in technology and the case of the dynamometer is no exception. Therefore, when talking about types, they can be divided into two main ones:

  • Mechanical Dynamometer

The classic model invented by Newton . It has an accuracy of ± 0.3% and is composed of the engraved cylinder and the tension spring. It is easy to get and quite inexpensive.

  • Digital Dynamometer

These have greater precision and the reading is thrown directly on a screen; however, they are more expensive than mechanical models. These are classified by the weight they can support and there are industrial models frequently used in the automotive sector.

In addition to these, there is the compression dynamometer , measuring the force with which an element is compressed; but it has a different operating principle, which is that of understanding, measuring through the decrease in volume caused by the force of pressure.

Dynamometers can have subtle variations in design but the most important difference between them, whether digital or mechanical, is the level of resistance they have, which will help you select exactly what you need, based on the use you will give it.

Dynamometer Features

The dynamometer has six parts , all essential to guarantee its correct operation. And even digital models follow the same principle; Therefore, knowing the parts of this and its function, within the structure of the instrument, it will be easier for you to understand its operation and use its use.

  • It has an outer cylinder, which is the visible body of the dynamometer, covers the internal parts
  • It has an Interior cylinder that fulfills the function of covering the dock
  • You will be able to see a piece called a spring that contains the scale to make the reading
  • It has a spring that is stretched by sliding the cylinder, presenting the result
  • In addition, it has hooks that are held at the different points from which the forces will be applied.

Once you understand the principle of the dynamometer and the relationship between its parts, understanding its operation is simple and even more so applying it. Something important that you must remember, when using it, is that the forces must be exerted in the opposite direction , to respect the principle of traction with which the force is calculated, otherwise the spring will not undergo stretching.

Importance of the Dynamometer

The dynamometer from its invention to the present day is a widely used tool . The power to determine forces allows a greater knowledge of the physical properties of the elements and together with that knowledge the power to take advantage of them without risk of damaging or deforming it, at least insofar as its resistance to the forces exerted on it is concerned.

Science and tools are for the service of man and the continuous improvement of these help to optimize the quality of life at different levels.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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