System for an Oar Determining the Rowing Force During an Oar Stroke

A system for an oar for determining the rowing force during an oar stroke of an oar in the water, comprising:

• a measurement receiver with an oar shaft-side receiving area for attachment to an oar shaft of an oar and with an oar grip-side receiving area for attachment to an oar grip of this oar;
• at least one strain gauge arranged in the measurement receiver, from whose signal a force can be determined;
• and
• an evaluation circuit connected to the strain gauge or strain gauges;
• wherein the longitudinal axis of the attachment of the measurement receiver to the oar shaft coincides with the longitudinal axis of the attachment of the measurement receiver to the oar grip without load, wherein the measurement receiver comprises at least one plate which extends between the oar shaft-side receiving area and the oar grip-side receiving area, so that when a force is exerted on the oar grip-side receiving area perpendicular to the plane of the plate, the plate assumes an S-shape, wherein two strain gauges are provided, which are applied close to the oar shaft-side receiving area or close to the oar grip-side receiving area on both sides of the plate on both sides of the plate, and wherein the evaluation circuit is configured to calculate the force exerted on the oar grip from the elongation and compression of the two strain gauges.