A method for ascertaining deformations of a geometric body or for measuring forces or torques acting on the geometric body with the aid of force measuring sensors or deformation measuring sensors, comprising:
- arranging multiple force measuring sensors or deformation measuring sensors in at least two groups on the geometric body;
- registering forces imposed on the geometric body or deformations of the geometric body in a first spatial direction with a first group of force sensors or deformations sensors with reference to a coordinate system fixed relative to the geometric body;
- registering forces acting on the geometric body or deformations of the geometric body in a second spatial direction with a second group of force sensors or deformation sensors with reference to the coordinate system which is fixed relative to the geometric body, wherein the second spatial direction is independent of the first spatial direction;
- outputting signals from the force measuring sensors or deformation measuring sensors of each of the first group and the second group;
- correlating the signal outputs from the first group of force sensors or deformation sensors with signal outputs from the second group of force sensors or deformation sensors, and wherein correlating the signal outputs includes:
- interconnecting the signal outputs from the force sensors or deformation sensors in the first group and in the second group in an electrical bridge circuit, wherein the interconnection of the signal outputs is selected such that the signal outputs of the electrical bridge circuit occurs proportionately to the acting forces or to the imposed torque or to the deformation of the geometric body, and wherein the step of interconnecting the signal outputs further comprises:
- providing at least four force sensors or deformation sensors in the first group and providing at least four force sensors or deformation sensors in the second group;
- connecting the signal outputs of four of the at least four force sensors or deformation sensors in the first group in a first electrical bridge circuit;
- connecting the signal outputs of four of the at least four force sensors or deformation sensors in the second group in a second electrical bridge circuit:
- registering and evaluating the correlated signal outputs of at least the first and second electrical bridge circuits, wherein the evaluation includes:
- comparing the signal outputs of at least the first electrical bridge circuit and the second electrical bridge circuit with respect to occurring symmetries and proportionately to the acting force or to the imposed torque or to the deformation of the geometric body;
- determining or assessing from the evaluated signal outputs force components, torques or deformation components acting on the geometric body in different spatial directions:
- and
- classifying as a measure for the imposed force, or the applied torque or the deformation that has occurred when the evaluation demonstrates as plausible results to be expected based on a shape of the geometric body and based on expected forces, torques or deformations and their spatial directions.