A consistent experimental approach for strain measurement: Two case studies
Anderson Silva1; Marcus Varanis1; Arthur Guilherme Mereles1
1 Federal University of Grande Dourados
doi:10.20906/CPS/CILAMCE2017-0718
Resumo
This paper presents a methodology for the measurement of strain by means of strain-gauges, performing the data acquisition using an Arduino Uno board, due to the low-cost and the easy manipulation of this microcontrollers. The measured signal conditioning is performed by means of a Wheatstone Bridge and then discretized by an Analog-Digital Converter (ADC) external to the Arduino. For the validation of the proposed measurement system are performed experiments on a cantilever beam and on a cantilever-supported shaft, the experimental results are compared with those obtained analytically and by simulation using the finite element method. The results obtained are in agreement with the literature and demonstrate that the proposed system has satisfactory accuracy.
Palavras-chave: Strain gauge; Arduino; Low-cost data acquisition