STRAIN GAUGE COMPRISING A FLEXIBLE SUBSTRATE AND A RESISTANCE LAYER, AND SENSOR ELEMENT COMPRISING A STRAIN GAUGE

摘要

The invention relates to a strain gauge (10) comprising a flexible substrate (12) and a resistance layer (14) which is arranged on the flexible substrate. At least one measuring resistor (18) with a conductor track (15), which comprises at least one straight conductor track section (40) and/or at least one curved conductor track section (42), is formed in the resistance layer by structuring the resistance layer, wherein the specific resistance of the resistance layer is based on an elongation in the longitudinal direction (34) and an elongation in a transverse direction (36) perpendicularly thereto. The strain gauge has at least one cutout (28) in the shape of a thinned region or at least one incision (30), and the at least one cutout is arranged within the at least one conductor track section (40, 42) or at a distance from the at least one conductor track section, said distance being smaller than ten times the thickness (D) of the flexible substrate. The depth (d) of the at least one cutout is at least 1/100 the width (B) of the at least one conductor track section when seen from the side on which the resistance layer is arranged. The invention additionally relates to sensor elements comprising at least one such strain gauge, to a method for adjusting the creep behavior of such sensor elements, to a method for minimizing the temperature coefficient of a measuring resistor of such sensor elements, and to a method for minimizing the transverse sensitivity of such sensor elements.