Method of measuring torsional stresses and/or axial stresses on a rotating shaft or on a comparable workpiece
First Claim
1. A method for measuring torsional stress and axial stress of a rotating workpiece, said method comprising the steps of:
- arranging at a surface of the workpiece at least two reflector pairs such that connecting lines between reflectors of each reflector pair are slanted relative to one another;
rotating the workpiece about an axis of rotation;
impinging a coherent laser light onto the at least two reflector pairs to produce reflected and interfering light beam pairs for each one of the reflector pairs;
determining a phase difference between the light beams of each light beam pair; and
calculating the torsional stress and axial stress from the phase difference.
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Abstract
A method for measuring torsional stress and axial stress of a rotating workpiece includes the step of arranging at a surface of the workpiece at least two reflector pairs such that connecting lines between reflectors of each reflector pair are slanted relative to one another. The workpiece is rotated about an axis of rotation. A coherent laser light is impinged onto the at least two reflector pairs to produce reflected and interfering light beam pairs for each one of the reflector pairs. The phase difference between the light beams of each light beam pair is determined and the torsional stress and axial stress are calculated from the phase difference.
19 Citations
20 Claims
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1. A method for measuring torsional stress and axial stress of a rotating workpiece, said method comprising the steps of:
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arranging at a surface of the workpiece at least two reflector pairs such that connecting lines between reflectors of each reflector pair are slanted relative to one another; rotating the workpiece about an axis of rotation; impinging a coherent laser light onto the at least two reflector pairs to produce reflected and interfering light beam pairs for each one of the reflector pairs; determining a phase difference between the light beams of each light beam pair; and calculating the torsional stress and axial stress from the phase difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification