Instrumental platform controlled by Labview for the power measurement and electric circuits characterisation

The progress of electronics and data processing contributed to the development of the measurement techniques of the virtual instruments. To contribute to this work one carried out an instrumental platform managed by Labview. The conceived measurement system is a multifunction. It ensures the measurement of the active, reactive and apparent power as well as the power-factor and the characterization of the load parameters while making recourse to the Fourier discrete transform. Moreover, one treats and identifies the characteristics of a ferromagnetic substance by the determination of the hysteresis loop, the first magnetization curve as well as the spectral analysis... etc. Indeed, two Hall sensors ensure respectively the adaptation of u(t) and i(t) and an analogical process makes it possible to extract the useful output. Via an interface board of the type NI-6024E, one acquires the power using a measurement statistical method which gives an arithmetic mean value that increases the measuring accuracy. This intelligent system makes measurements easy, less cumbersome and it removes the majority of the errors presented by the analogical systems at knowing dispersion and the limitation of the size of the components and the reproducibility. This instrumental platform reduces the experimenter of any long and tiresome calculation. It replaces multiple traditional measuring apparatus while ensuring a better precision. The measurement ranges of this power systems are: an input voltage of 220V and a maximum load current of 10A. The accury is less than 0.2%.