Pavel Kulha

Dr. Pavel Kulha


Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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9 August 2017 in Proceedings
Verified
Conference Paper
Open access
PDF file
PKPavel Kulha
Pavel Kulha
HEHerbert Enser
Herbert Enser
JSJohannes K. Sell
Johannes K. Sell
BJBernhard Jakoby
Bernhard Jakoby
MSMichaela Schatzl-Linder
Michaela Schatzl-Linder
WHWolfgang Hilber
Wolfgang Hilber
The paper reports on temperature behavior of strain sensitivity of recently introduced screen printing technology facilitating the realization of silver and carbon black piezoresistors embedded in organic coatings. Piezoresistive layers were prepared by screen printing directly on the top of the organic coating. Since no glue or carrying substrates are between the sensitive element and the device under test, the coupling factor is high and the strain is efficiently transferred to the sensing element. The strain induced changes in resistance (piezoresistive effect) are generally lower compared to the changes induced by temperature. The temperature dependence of the sensitivity to strain was investigated utilizing both single element piezoresistors and piezoresistors connected to a Wheatstone bridge. The study analyzes strain-gauges under longitudinal tensile and compressive strain and temperatures up to 80 °C. Screen printed strain gauges can provide reliable and robust strain measurements for coated metallic substrates, the sensor performance is comparable to the conventional solution with glued sensors.