A simple, high sensitivity torquemeter
- 1 June 1999
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 70 (6) , 2732-2734
- https://doi.org/10.1063/1.1149837
Abstract
A simple torquemeter has been developed with a sensitivity exceeding 10−13 Nm when using a 13-μm-diam glass fiber and a low-mass suspension. The maximum twist angle of the fiber is constrained by the choice of its diameter to ∼1°. This angle is measured using a light, mirror, and split silicon photodetector, and is proportional to the torque on a sample in a rotating dc magnetic field.Keywords
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