Optical torsion deformation monitoring with TIR prism rods for application in higly stressed machine elements
Abstract
This article presents a new optical measuring principle for torsion in which a laser beam is guided through a totally internally reflective (TIR) prism rod. The sensor system consists of a laser diode, the TIR prism rod and a detector. Torsion changes the angle at which the laser beam is reflected at the rod surfaces and thus the position at which the beam is decoupled from the rod and therefore its position on the detector. This effective change is amplified by multiple total internal reflections so that the deformation of the rod can be measured with high sensitivity. The verified optical principle enables the development of integrated optical sensors for mechanically stressed components like shafts to monitor their deformation during operation. These can be installed into highly stressed parts in order to measure the loads and monitor operating conditions and wear processes. Because of the encapsulation of the sensor, it is insensitive to environmental influences and disturbance, which means it can also be used where operating conditions or a lack of installation space make the use of conventional sensor technology, such as strain gauges or camera-based monitoring, impossible.
Details
- Organisation(s)
-
Institute of Motion Engineering and Mechanism Design
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
- Type
- Conference contribution
- Publication date
- 19.03.2025
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering
- Electronic version(s)
-
https://doi.org/10.1117/12.3041133 (Access:
Closed
)
