D6.1 - Robust force and torque measurements by integrated sensors in hollow shafts
- AMA Conferences 2017
2017-05-30 - 2017-06-01
- Proceedings Sensor 2017
- D6 - Mechanical Sensors: Special Applications
- M. Krech, P. Groche - Technische Universität Darmstadt (Germany)
- 511 - 515
This contribution presents a manufacturing method for producing hollow shafts with integrated sensors. An incremental forming process is used to join a deformation sensing element in a tubular part during forming. A mechanical pre-tension is created to ensure a high linearity. The sensor signals are utilized during manufacturing to monitor and control the processes. Control and monitoring strategies are derived in order to achieve a constant quality of the sensory structures. In order to design the joining process a numerical model is used. The resulting pre-tension force could be predicted numerically with a deviation of 30 % for aluminum and 6 % for the steel tubes. A 32 x 4 mm hollow shaft is produced and characterized with ±1.2 kNm on a torque testing machine. A demonstrator with an integrated miniature measurement amplifier illustrates the high potential of measuring at the inside of rotating or moving parts to exploit inaccessible measurement regions.