Force and dynamometry

The dynamometer is a mobile device for measuring forces in tension and compression. It is also known as a manual force gauge.

  • The electronic dynamometer works with the help of a force sensor. A current differential related to the deformation of the sensor under load is interpreted in a force unit (Newton, Kilogram, …) thanks to the digital display.
  • The mechanical dynamometer works mainly with a spring so the known compression or extension allows measurement. This is the principle of the load cell.

These two types of dynamometers have advantages and disadvantages.

The mechanical dynamometer is robust, and can operate in hostile environments or locations. However, it is less accurate and more difficult to repair.

In contrast, the electronic dynamometer is more accurate and more compact. The electronics allow many functions to be added to it (detection of peaks, breakage, rupture, etc.).It allows the use of data, communication with a compression and traction test bench to carry out complex tests. It is easier to repair. It is the most widespread in industrial use.

Within this range, there are also high capacity force gauges, also known as lifting force gauges.

What is a high capacity dynamometer and what is its use?

The equipment is designed to measure forces from 0.5T to over 50T. They are used to check the strength and conformity of lifting equipment, cranes and handling tools. They have a high strength coefficient and are equipped with shackles and hooks. They are used in the aeronautical, railway, space, maritime transport and shipbuilding sectors.

They exist in mechanical and electronic versions with remote display.

ACRN also offers tension/compression benches coupled with a dynamometer or a loadcell.

What is a traction-compression bench?

The traction-compression bench is an electrical machine that allows programmed up/down movements. Connected to an electronic dynamometer or load cell.

What is the purpose of the traction-compression bench?

It allows the following tests to be carried out:

  • Resistance to stress (e.g. measuring the breakage of a cable/fabric)
  • Tensile/compression stress (e.g. the crushing force of a yoghurt)
  • Fatigue tests (e.g.: resistance over time of an opening/closing mechanism after 10,000 cycles)
  • Bending (e.g. bending of a tennis racket under stress)
  • Friction (e.g. measurement of the friction coefficient of an anti-slip material)
  • Resistance to elongation (e.g. study of the elongation of an elastic material)
  • Fracture tests (e.g. measurement of the breaking strength of a plastic component)
  • Slip/friction coefficient (e.g. measuring the slip coefficient of a plastic film used in a packaging process)

There are models of various capacities and with different levels of technology. They can be equipped with a control panel, or driven by a computer and/or linked to software. Thus, it is possible to set up standard tests including reports, to record numerous results, to do curve analysis.

Banc de traction compression

Is a tension-compression test simple to set up?

Several factors need to be taken into account when setting up a tensile, compression or strength test.

The choice of equipment (dynamometer, test bench and tooling) depends on

  • The forces to be measured (low or high capacity)
  • The nature of the test (breakage test, deformation, tearing, coefficient of friction or sliding coefficient, crushing resistance, etc.)
  • The standard of the test, if any, to be met.

What is expected from the test: simple measurement, rupture, curve, acquisition frequency.

But it is also necessary to take into account the potential future needs in order to choose the right equipment. Software-controlled tensile testers are great laboratory tools but may not be useful for production testing in industry.

ACRN is both a manufacturer of these dynamometers and also partners with proven brands, including Mecmesin. We can therefore offer you equipment adapted to your present and future needs, while respecting your budgets and constraints.