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Title: Measuring Torque and Temperature in a Rotating Shaft Using Commercial SAW Sensors
Author: Silva, Diogo
Mendes, Joana Catarina
Pereira, António Bastos
Gégot, François
Alves, Luis Nero
Keywords: SAW sensor
Rotating shaft
Torque measurement
Issue Date: 27-Jun-2017
Publisher: MDPI
Abstract: Real-time monitoring of torque in a rotating shaft is not easy to implement with technologies such as optic fiber sensors or strain gages. Surface acoustic wave (SAW) sensors are wireless and passive and can be used to monitor strain in moving parts. Commercial solutions (sensors, antennas and interrogation unit) can easily be purchased from some companies; however, they are not customized and may not meet the specificity of the measurements. In order to evaluate the adequacy of commercial off-the-shelf (COTS) solutions, temperature and strain sensors fabricated by SENSeOR (Besançon, France) were mounted on a load cell. The sensors were calibrated using a thermal chamber and a universal testing machine. The load cell was then assembled together with a steel shaft that rotated at different speeds inside an oven. The commercial antennas were replaced with an RF (radio frequency) coupler and the sensors were interrogated with the commercial interrogation unit. The influence of rotation in the accuracy on the measurements, as well as the adequacy of the sensors structure, was evaluated. It can be concluded that SAW sensors can be used to measure temperature or torque in a rotating environment; however, some customization of the components is required in order to overcome the limitations posed by COTS sensing solutions.
Peer review: yes
DOI: 10.3390/s17071547
ISSN: 1424-8220
Appears in Collections:TEMA - Artigos
DETI - Artigos
IT - Artigos

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