A3.2 - High Precision Torque Measurement Systems in Engine Test Benches
- SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg
- Proceedings SENSOR 2009, Volume I
- A3 - Mechanical Sensors I
- S. Kuhn, R. Schicker - Hottinger Baldwin Messtechnik GmbH, Darmstadt, Germany
- 77 - 85
The demand for drive concepts to develop economical vehicles that meet environmental guidelines always involves increasing requirements on test equipment. Highly dynamic, high-resolution torque measurements in the shaft train are essential for designing and optimizing engine, transmission and chassis.
Reproducibility is very good with modern, strain gage-based torque transducers. The overall accuracy of the torque measuring system is basically determined by mechanical disturbance variables and by thermal and humidity effects that have not been compensated for. Carrier frequency amplifiers are used in rotating measurement flanges to minimize the effects of thermal voltages and low-frequency drifts in operational amplifiers. Digital signal processing enables torque transducers to be flexibly configured and adapted to meet the requirements of the test stand.