Stretching strip comprising a flexible substrate and a resistance layer and sensor element comprising a strain gauge

摘要

The invention relates to a strain gauge comprising a flexible substrate and a resistor layer arranged on the flexible substrate, wherein in the resistance layer at least one measuring resistor with a conductor track, with at least one straight conductor section and / or at least one curved conductor track section is formed by structuring the resistance layer, wherein the resistivity of the resistive layer is dependent on an elongation in a longitudinal direction and an elongation in a transverse direction perpendicular thereto. The strain gage has at least one free cut in the form of a thinned area or at least one notch, wherein the at least one free cut is arranged within the at least one conductor track section or at a distance from the at least one track track section which is less than ten times the thickness of the flexible substrate, wherein the depth of the at least one cutout viewed from the side on which the resistive layer is disposed, at least 1/100 of the width of the at least one conductor track portion.Further aspects of the invention relate to sensor elements comprising at least one such strain gauge, a method for Adjusting the creep behavior of such sensor elements and a method for minimizing the temperature coefficient of a measuring resistor of such sensor elements.