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Open AccessArticle

The Rehapiano—Detecting, Measuring, and Analyzing Action Tremor Using Strain Gauges

Department of Cybernetics and Artificial Intelligence, Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, 07602 Košice, Slovakia
The Biorobotics Institute, Scuola Superiore Sant’Anna, 560 25 Pisa, Italy
Author to whom correspondence should be addressed.
Sensors 2020, 20(3), 663;
Received: 18 November 2019 / Revised: 23 January 2020 / Accepted: 23 January 2020 / Published: 24 January 2020
We have developed a device, the Rehapiano, for the fast and quantitative assessment of action tremor. It uses strain gauges to measure force exerted by individual fingers. This article verifies the device’s capability to measure and monitor the development of upper limb tremor. The Rehapiano uses a precision, 24-bit, analog-to-digital converter and an Arduino microcomputer to transfer raw data via a USB interface to a computer for processing, database storage, and evaluation. First, our experiments validated the device by measuring simulated tremors with known frequencies. Second, we created a measurement protocol, which we used to measure and compare healthy patients and patients with Parkinson’s disease. Finally, we evaluated the repeatability of a quantitative assessment. We verified our hypothesis that the Rehapiano is able to detect force changes, and our experimental results confirmed that our system is capable of measuring action tremor. The Rehapiano is also sensitive enough to enable the quantification of Parkinsonian tremors. View Full-Text
Keywords: strain gauge; tremor quantification; Parkinson’s disease; action tremors strain gauge; tremor quantification; Parkinson’s disease; action tremors
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Ferenčík, N.; Jaščur, M.; Bundzel, M.; Cavallo, F. The Rehapiano—Detecting, Measuring, and Analyzing Action Tremor Using Strain Gauges. Sensors 2020, 20, 663.

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