0551823 - FGÚ 2022 RIV CH eng J - Journal Article
Lopot, F. - Dub, M. - Flek, J. - Hadraba, Daniel - Havlíček, M. - Kučera, L. - Štoček, O. - Veselý, T. - Janáček, Jiří
Gearbox Mechanical Efficiency Determination by Strain Gauges Direct Application.
Applied Sciences-Basel. Roč. 11, č. 23 (2021), č. článku 11150. ISSN 2076-3417. E-ISSN 2076-3417
R&D Projects: GA MŠMT(CZ) LM2018129
Institutional support: RVO:67985823
Keywords : strain-gauge * efficiency * notch * FEM * calibration
OECD category: Medical laboratory technology (including laboratory samples analysis
Impact factor: 2.838, year: 2021 ; AIS: 0.409, rok: 2021
Method of publishing: Open access
Result website:
https://www.mdpi.com/2076-3417/11/23/11150DOI: https://doi.org/10.3390/app112311150

This article describes a unique method of measuring the efficiency of gearboxes using foil strain gauges, which allows maintaining the current configuration of the gearbox within the overall assembly of the machine and its functional condition. The presented method is applicable to gearboxes located in the original equipment assembly without the need to use a test rig. Using foil strain gauges, the torque at the input and output of the gearbox is detected. Therefore, the accuracy of torque measurement is key. The crucial step is the calibration of the instrumentation to the given application conditions, which, in this case, is ensured by a virtual calibration using a very accurate FEM analysis. The accuracy of the position of strain gauges and virtual calibration of measurements generate inaccuracies affecting the resulting uncertainty of the determined efficiency. The present article shows, on the example of several measurements, that when using 24-bit converters, after processing the obtained data, mechanical stress with a sensitivity better than hundredths of an MPa can be reliably detected even without signal amplification from strain gauges. It follows that the efficiency is determined with an accuracy of better than low units of tenths.
Permanent Link: http://hdl.handle.net/11104/0327138