This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Influence of the Wheatstone bridge configuration and the magnitude of the calibration weight in the uncertainty of the load measurement using a low-cost instrumentation
Technical Paper
2018-36-0193
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
The strain gauge (SG) is widely used for measurement of strains, or even of loads, in mechanical or structural components, mostly due to their low-cost, easy application and good accuracy. However, the literature is lacking in relation to studies concerning the determination of measurement uncertainty. This work presents a discussion of the influence of the SGs configuration in the Wheatstone bridge and the magnitude of the calibration weight applied to the measurement of load in a bending load (whose design is similar that used in load cells). Were compared ¼, ½ and full bridge configurations to linear SGs with 350Ω resistance. Low-cost instrumentation was used with the HX711 converter module and the Arduino microcontroller board. The measuring system was calibrated with two different weights: one of approximately 10% of the maximum value of the system operating range and another one of approximately 85%. Some conclusions can be highlighted, such as the influence of the amount of the SGs on the Wheatstone bridge and the magnitude of the calibration weight on the uncertainty of load measurement. Adding up, these results helpful to discuss a relation between a measurement uncertainty and the implementation cost.
Authors
- Pedro Henrique B. P. de Lima - 1 Mechanical Engineering Department, Federal University of T
- Gabriel César da Silva - 1 Mechanical Engineering Department, Federal University of T
- Igor Rafael Guizelini - 1 Mechanical Engineering Department, Federal University of T
- João Luiz do Vale - 1 Mechanical Engineering Department, Federal University of T
Citation
Lima, P., Silva, G., Guizelini, I., and Vale, J., "Influence of the Wheatstone bridge configuration and the magnitude of the calibration weight in the uncertainty of the load measurement using a low-cost instrumentation," SAE Technical Paper 2018-36-0193, 2018, https://doi.org/10.4271/2018-36-0193.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Chalmers , G. F. , The dangers of the 5% mentality Proceedings of the International Conference of the BSSM and The Institution of Production Engineers 1980
- W Montero , R Farag , V Díaz, B L Boada ., Uncertainties associated with strain-measuring systems using resistance strain gauges 2010
- ISO Guide to the expression of uncertainty in measurement, Corrected and Reprinted 1995
- Window , A. L. and Holister , G. S. Strain gauge technology 2nd 1992 Applied Science Publishers London, UK
- 8 Vishay Micro-Measurements Strain gauge thermal output and gauge factor variation with temperature 2007 35 47
- Hoffmann , K. , An introduction to measurements using strain gauges 1989 Hottinger Baldwin Messtechnik GmbH Darmstadt, Germany