Method and system for gait analysis
AssigneeMCG motion capture GmbH
InventorThomas Ertelt
Life of this patent
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Abstract
The invention relates to a method for gait analysis. In this method, data comprising a ground reaction force curve is first obtained from a force measuring device. Then, a determination of a first approximation of the ground reaction force curve performed by at least a first approximation function defined by a set of coefficients. Then, a determination of a second approximation of the ground reaction force curve is performed by a second approximation function formed on the basis of the set of coefficients of the at least one first approximation function. Further, the invention relates to a gait analysis system.
Claims10
A method for gait analysis, comprising:
- obtaining data including a ground reaction force curve from a force measuring device,
- determining a first approximation of the ground reaction force curve by at least a first approximation function defined by a set of coefficients, and
- determining a second approximation of the ground reaction force curve by a second approximation function formed on the basis of the set of coefficients of the at least one first approximation function,
- wherein the at least one set of coefficients is combined into a coefficient pool from which individual coefficients can be combined to form the second approximation function;
- providing a neural network arranged to obtain the at least one set of coefficients as an input variable and to generate a class information as an output variable;
- wherein the at least one set of coefficients comprises a maximum value, a position, and a width of the first approximation function;
- wherein the output variable is one of the following:
- a respective sport, in a medical setting a respective pathology or stage of impairment.
A gait analysis system, comprising:
- a force measuring device configured to detect a ground reaction force, an electronic evaluation device configured to:
- approximate, from the detected ground reaction force, a ground reaction force curve by at least a first approximation function defined by a set of coefficients, and
- further approximate the ground reaction force curve by a second approximation function formed on the basis of the set of coefficients, and
- a database adapted to associate a combination of coefficients forming the second approximation function with a predetermined gait, a gait abnormality, and/or another foot- ground interaction;
- further comprising at least one neural network adapted to receive the coefficients as input and to generate class information as output;
- wherein the coefficients comprise a maximum value, a position and a width of the first approximation function;
- wherein the class information is one of the following:
- a respective sport, in a medical setting a respective pathology, or stage of impairment.
A non-transitory computer readable medium comprising program element which, when executed by means of a processor of an electronic evaluation device, causes the evaluation device to perform the following steps:
- obtaining data including a ground reaction force curve from a force measuring device,
- determining a first approximation of the ground reaction force curve by at least a first approximation function defined by a set of coefficients, and
- determining a second approximation of the ground reaction force curve by a second approximation function formed on the basis of the set of coefficients of the first approximation function,
- wherein the at least one set of coefficients is combined into a coefficient pool from which individual coefficients can be combined to form the second approximation function;
- providing a neural network arranged to obtain the at least one set of coefficients as an input variable and to generate a class information as an output variable;
- wherein the at least one set of coefficients comprises a maximum value, a position and a width of the first approximation function;
- wherein the output variable is one of the following:
- a respective sport, in a medical setting a respective pathology or stage of impairment.
Dependencies are inferred from the claim text.