Abstract: The invention relates to a miniature, integrated strain-measuring device with a simple and economical design which can be mass produced at least cost and comprising reliable, reproducible and tamperproof settings. The inventive device can be quickly installed on the structure to be measured without the need for a specialist technician and without altering said structure. The device comprises a deformable element (20) which is mounted between two mounting posts (30, 40) which are intended to be fixed to a structure (1) to be measured, said deformable element (20) bearing strain gauges (61) which are connected to an electronic signal-conditioning circuit (70). The invention is characterised in that it comprises means of prestressing (80) the deformable element (20), said means being provided with at least one prestressing rod (81) which extends between the two mounting posts (30, 40).

Abstract: The invention relates to a miniature, integrated strain-measuring device with a simple and economical design which can be mass produced at least cost and comprising reliable, reproducible and tamperproof settings. The inventive device can be quickly installed on the structure to be measured without the need for a specialist technician and without altering said structure. The device comprises a deformable element (20) which is mounted between two mounting posts (30, 40) which are intended to be fixed to a structure (1) to be measured, said deformable element (20) bearing strain gauges (61) which are connected to an electronic signal-conditioning circuit (70). The invention is characterised in that it comprises means of prestressing (80) the deformable element (20), said means being provided with at least one prestressing rod (81) which extends between the two mounting posts (30, 40).

Abstract: The invention concerns a tensile testing sensor mounted on a mechanical member wherein forces to be measures develop comprising a bendable metal blade (1, 22) provided with measuring gauges (2, 23) implanted and positioned on the blade. Said blade (1, 22) is sensitive to mechanical tensile and compressive deformations sustained and transmitted via two bearing parts (4, 5, 20) coupled to the mechanical member wherein the forces develop. The sensor is equipped with a mechanically locking flange (31) placed during calibration between the bearing parts (4, 5, 20) and the sensor blade.