The experimental device that we propose is an electromagnetic sensor permits the measures of force and displacement. her principle of working rests on the phenomenon of influence by magnetic induction between two flat spools, in the same way diameter and including the same number of spires, situated to a certain distance, x, one of the other, on a same axis passing by their centers. The sensor is constituted of two converters, the first is the spring (converter force-displacement), and the second is a magnetic circuit permitting the conversion of the displacement in tension (converter displacement-tension) via the electronic circuit of conditioning.

<p>This article develops also a measure and prototype to allow the acquisition of real time data for display, analysis, control and storage with a proposed test program for determining the model parameters. The aim is to be able to measure, and apply moment to a specimen, and collect data from the resulting deformation in the material. At the same time, the reliability of this test system has been proved by precision analysis and data processing for a simple test validation (metal wire). The force-deformation curves of solids materials in this tensile test are measured accurately in real time, to obtain the values of solid materials mechanical property parameters, The minimal change in length of the test Specimen that can be resolved by this system is 1µm, which yields the sensitivity comprised between 10-4µm and 10-5 µm. Based on the experience that compressive tensile test have the smallest statistical scatter and that they are simplest to carry out. The measuring device can improve the measuring efficiency and accuracy distinctly while has advantages of simple configuration, low cost and high stability.</p>

The mechanism that we propose is a water level sensor (Tide-Gauge), using the Archimedes principle, according to which a body immersed in a fluid in equilibrium, subjected to on behalf of this one a thrust which the intensity is equal to the weight of the fluid displaced. It is composed of an electromagnetic sensor forces of which is suspended a plunger cylindrical glass. The latter is partially introduced into a measuring cylinder filled with water. The electromagnetic sensor of forces allows us to measure the difference between the weight of the cylinder and the force due to the buoyancy exerted by the water on the submerged part of the cylinder. When the water level in the test piece changes it is implied by a variation of the submerged portion of the cylinder, and causes a variation of the buoyancy, as a consequence of variation of the force exerted on the sensor. The electromagnetic sensor allows the conversion of this force into a voltage by the intermediate of an electronic circuit.

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<p>This article develops also a measure and prototype to allow the acquisition of real time data for display, analysis, control and storage with a proposed test program for determining the model parameters. The aim is to be able to measure, and apply moment to a specimen, and collect data from the resulting deformation in the material. At the same time, the reliability of this test system has been proved by precision analysis and data processing for a simple test validation (metal wire). The force-deformation curves of solids materials in this tensile test are measured accurately in real time, to obtain the values of solid materials mechanical property parameters, The minimal change in length of the test Specimen that can be resolved by this system is 1µm, which yields the sensitivity comprised between 10-4µm and 10-5 µm. Based on the experience that compressive tensile test have the smallest statistical scatter and that they are simplest to carry out. The measuring device can improve the measuring efficiency and accuracy distinctly while has advantages of simple configuration, low cost and high stability.</p>