Load cell and weighing foot

A weighing foot having a load cell, the load cell comprising:

• a spring body formed rotationally symmetrically about a center axis, the spring body comprising an outer support ring, an upwardly projecting inner force introduction element, and an annular deformation section that is formed as an annular membrane, wherein the outer support ring and the force introduction element are fixedly connected to one another with the annular membrane;
• and
• a plurality of strain gauges arranged on a lower side of the annular membrane configured for detecting a stretching and/or compressive deformation of the spring body, wherein the plurality of strain gauges are electrically connected to form at least a part of a Wheatstone bridge,
• wherein at least one first strain gauge of the plurality of strain gauges is disposed on a first circle having a first radius about the center axis of the spring body and at least one second strain gauge of the plurality of strain gauges is disposed on a second circle having a second radius that is greater than the first radius about the center axis of the spring body,
• wherein a first mean thickness of the annular membrane in a first region of the at least one first strain gauge is larger than a second mean thickness of the annular membrane in a second region of the at least one second strain gauge, and
• wherein the at least one first strain gauge overlaps the inner force introduction element and the annular membrane and the at least one second strain gauge is overlaps the outer support ring and the annular membrane.

A weighing system comprising a plurality of weighing feet, and a load carrier supported on the plurality of weighing feet, wherein each weighing foot comprising a load cell, wherein each load cell comprises:

• a spring body formed rotationally symmetrically about a center axis, the spring body comprising an outer support ring, an upwardly projecting inner force introduction element, and an annular deformation section that is formed as an annular membrane wherein the outer support ring and the force introduction element are fixedly connected to one another with the annular membrane;
• and
• a plurality of strain gauges arranged on a lower side of the annular membrane configured for detecting a stretching and/or compressive deformation of the spring body, wherein the plurality of strain gauges are electrically connected to form at least a part of a Wheatstone bridge,
• wherein at least one first strain gauge of the plurality of strain gauges is disposed on a first circle having a first radius about the center axis of the spring body and at least one second strain gauge of the plurality of strain gauges is disposed on a second circle having a second radius that is greater than the first radius about the center axis of the spring body,
• wherein a first mean thickness of the annular membrane in a first region of the at least one first strain gauge is larger than a second mean thickness of the annular membrane in a second region of the at least one second strain gauge, and
• wherein the at least one first strain gauge overlaps the inner force introduction element and the annular membrane and the at least one second strain gauge is overlaps the outer support ring and the annular membrane.