A8.3 - A Novel Magneto–Elastic Force Sensor Design Based On Terfenol–D
- SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg
- Proceedings SENSOR 2009, Volume II
- A8 - Magnetic Sensors III
- K. Oppermann, B. Zagar - Johannes Kepler University, Linz, Austria
- 77 - 82
In this paper the magneto–elastic–effect is taken under further investigation, to determine the utility of the novel material Terfenol–D in force sensor applications. By the reason that Terfenol–D has one of the largest magnetostrictive constant known we anticipated to get a higher sensitivity of the force sensor as compared to other materials e. g. steel.
A simple and robust single coil sensor set-up is introduced. The dependency on the characteristic parameter of this set-up the reluctance Rm is determined vs. both the mechanically applied force and vs. the frequency of the excitation signal. These parameters are needed to determine the optimal trade-off between the sensitivity and the dynamic behaviour of the sensor.
A prototype of the electronic to measure force by measuring the inductance L of the single coil sensor set-up is presented. The capability of the sensor set-up is demonstrated by quasi-static compressive force steps in the range of 0.1 ≤ Fc ≤ 2 kN.