Method for checking an assembly of at least three strain gauges and strain wave gearing
AssigneeSchaeffler Technologies AG & Co. KG
InventorKazuaki Kaneko
Life of this patent
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Abstract
An assembly includes at least three strain gauges and is attached to an elastic transmission element of a strain wave gearing. The assembly is designed to measure a torque acting on the elastic transmission element. Output signals from each of the strain gauges are measured. The output signal of one of the strain gauges is predicted from the measured output signals of the other strain gauges. An error message is output based on the predicted output signal deviating from the respective measured output signal by more than a predetermined tolerance.
Claims18
A method for checking an assembly by measuring a torque acting on the assembly, the method comprising:
- providing the assembly with at least three strain gauges attached to an elastic transmission element of a strain wave gearing;
- measuring, by a microcontroller of the assembly, output signals from each of the strain gauges;
- predicting, by the microcontroller, the output signal from one of the strain gauges based on the measured output signals of the other strain gauges;
- selecting a predetermined tolerance based on a function of a rotational speed of the elastic transmission element;
- and
- outputting, by the microcontroller, an error message based on the predicted output signals deviating from the respective measured output signal by more than the predetermined tolerance.
A method for checking an assembly by measuring a torque acting on the assembly, the method comprising:
- providing the assembly with at least three strain gauges attached to an elastic transmission element of a strain wave gearing;
- measuring, by a microcontroller of the assembly, output signals from each of the strain gauges;
- predicting, by the microcontroller, the output signal from one of the strain gauges from the measured output signals of the other strain gauges based on a mathematical prediction model, wherein the mathematical prediction model is determined by a finite element analysis or by a machine learning method;
- and
- outputting, by the microcontroller, an error message based on the predicted output signals deviating from the respective measured output signal by more than the predetermined tolerance.
A strain wave gearing, comprising:
- an elastic transmission element;
- an assembly of at least three strain gauges, the assembly being applied to the elastic transmission element and being designed to measure a torque acting on the elastic transmission element;
- and
- a microcontroller configured to:
- measure output signals from each of the strain gauges;
- predict the output signal from one of the strain gauges based on the measured output signals of the other strain gauges;
- select a predetermined tolerance based on a function of a rotational speed of the elastic transmission element;
- and
- output an error message based on the predicted output signal deviating from the respective measured output signal by more than the predetermined tolerance.
Dependencies are inferred from the claim text.