Development of a non-contact torque transducer based on the laser speckle contrast method
When a torque measurement is required, torque transducers show many drawbacks during their use: the usual limits are the need for contact and the effects on shaft line parameters. A new approach is proposed in this work: a non-contact torque meter for a machine shaft has been developed. It carrie...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2017-07-01
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| Series: | Journal of Sensors and Sensor Systems |
| Online Access: | https://www.j-sens-sens-syst.net/6/253/2017/jsss-6-253-2017.pdf |
| Summary: | When a torque measurement is required, torque transducers show many
drawbacks during their use: the usual limits are the need for contact and the
effects on shaft line parameters. A new approach is proposed in this work: a
non-contact torque meter for a machine shaft has been developed. It carries
out torque measurements evaluating the torsional displacement between two
distinct sections of the shaft, through the monitoring of their roughness.
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The sensing principle employed is the classical laser speckle contrast
method. The outcoming intensity scattered by the rough surface is processed
by a cross-correlation function. In this way, the angular torsion of two
distinct sections is obtained. It is therefore possible to point out the
applied torque knowing the shaft torsional stiffness. |
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| ISSN: | 2194-8771 2194-878X |