P2.4 - Investigation on strain gauges made from carbon black based ink
- AMA Conferences 2015
2015-05-19 - 2015-05-21
- Proceedings SENSOR 2015
- P2 - Mechanical
- A. Jäger, T. Meiß, R. Werthschützky - Technische Universität Darmstadt (Germany)
- 766 - 768
The behavior of printed piezo-resistive strain gauges based on amorphous carbon black are studied when applied to a steel deformation body. Strain gauges made from piezo-resistive materials offer far higher gauge factors compared to metal film strain gauges and thus in theory a higher signal-to-noise-ratio. Amorphous carbon is a promising material offering gauge factors of up to 70 and can be process using inkjet material deposition thanks to the process developed by. Khajeh et. al. .
We produced a printed strain gauge using this process and compared it to a commercial available etched metal film strain gauge using a 4-point bending experiment.
We printed our resistor on commercial glossy photo paper. The paper substrate is glued to a steel bend specimen and bend three times. The measurement shows a gauge factor of about 23 which in the range of what  reports.