A Case Study on Quantifying the Workload of Working Machine Operators by Means of Psychophysiological Measurements

Reno Filla
Emerging Technologies, Volvo Construction Equipment, Eskilstuna, Sweden

Erik M. G. Olsson
Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden

Bo H. C. von Scehéele
Stress Medicine AB, Bergvik, Sweden

Kjell Ohlsson
Department of Management and Engineering, Linköping University, Linköping, Sweden

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp1392a29

Ingår i: 13th Scandinavian International Conference on Fluid Power; June 3-5; 2013; Linköping; Sweden

Linköping Electronic Conference Proceedings 92:29, s. 293-304

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Publicerad: 2013-09-09

ISBN: 978-91-7519-572-8

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


In this study of eighteen wheel loader operators; test-driving a machine in three different traction force settings; we examine if a workload index derived from psychophysiological measurements of heart rate; finger temperature; skin conductance; respiration rate and end-tidal CO2-concentration in exhaled air can be easily used to assess operator workload in sufficient detail to use it as a complement to traditional subjective evaluations in machine testing; either of real machines or in a human-in-the-loop simulator. In a longer perspective; such measurements are expected to play a role in a workload-adaptive operator assistance system.

However; the findings do not give support for this vision. Instead they indicate that other types of measurements than what have been used in our study should be employed if ease of use for practitioners such as test engineers is in focus; but also that other factors than just machine operability must be considered to have a great influence on the operator workload.


Operator; working machines; wheel loaders; operator workload; stress; operability; human-machine interaction


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