Digital force sensor with a measuring cell able to be deformed elastically and method for directly measuring the application of a force
AssigneeSysmelec SA
InventorMaxime Odiet
Life of this patent
Estimating the term…
Abstract
The digital force sensor (1) includes a measuring cell (2) which is able to be deformed elastically, the deformation of said cell (2) directly resulting from the force with which a robot arm approaches a discrete electronic component (11) in a magazine, then mounts it onto a printed circuit, and digital means (3) for measuring a displacement representative of the deformation of said cell (2), then supplying in response to said displacement a digital signal corresponding to the direct measurement of the force with which the robot arm approaches, then mounts the electronic component onto the printed circuit.
Claims14
A sensor for directly measuring the application of a force, including an elastically deformable measuring cell, the deformation of said cell resulting directly from the application of the force, and digital measuring means for measuring a displacement representative of the deformation of said cell, then supplying in response to said displacement a digital electric signal corresponding to the direct measurement of the force applied and wherein said sensor cooperates with a stop which corresponds to the absence of any force applied to said cell.
A method for calibrating a sensor for directly measuring the application of a force, said sensor including a measuring cell able to be deformed elastically, the deformation of said cell resulting directly from the application of the force, and digital means for measuring a displacement representative of the deformation of said cell, then supplying in response to said displacement a digital electric signal corresponding to the direct measurement of the force applied, wherein said method comprises the steps of:
- prior to implementation of the sensor, an initial step of resetting the measuring cell to zero is performed leaving the latter to oscillate freely about its position of equilibrium, the oscillation signal being recorded and allowing the mean of the maximum and minimum elongations of said measuring cell to be calculated,
- calculating from said mean elongation of said cell the position of zero displacement of the linear incremental measuring device, which corresponds to the absence of any force applied onto the measuring cell, and
- adjusting a stop position of the measuring cell by means of a cam device so that the stop position corresponds to the zero force position determined herein before.
Dependencies are inferred from the claim text.