Technical University of Darmstadt
Providing reliable measuring data about relevant state and process variables of technical systems by means of integrated sensory functions is one of the keys to achieving Industry 4.0. To allow for an easy integration or retrofit of sensory functions into technical systems, sensory extended machine elements are a promising approach, as machine elements are part of almost every technical system. Against this background, an inventive sensory disk pack coupling was developed and presented in prior works. This coupling allows for the in-situ measurement of the current radial shaft offset and the rotational frequency of the coupling – both important measurands in mechanical drive trains – by the piezoelectric effect. As the potential of this coupling has so far only been explored superficially, the objective of this contribution is a more comprehensive experimental investigation of its potential in terms of measurement accuracy and precision. To investigate the potential of the sensory coupling, a screening test plan is developed and carried out using an existing gearbox test bench. In these screening tests, different rotational frequencies and radial offset levels are investigated. Based on the results of the screening tests, a comparison of the measurement results with the set level values, as well as among the measurement results themselves, is conducted. Building on these comparisons, the potential of the sensory disk pack coupling can be assessed with regard to the accuracy and precision of the measurements.
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Abstract
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