C2.4 - Transducer misalignment - an insuperable obstacle for acoustic clamp-on liquid level measurement?
- AMA Conferences 2017
2017-05-30 - 2017-06-01
- Proceedings Sensor 2017
- C2 - Acoustic Methods II
- U. Steinmann - Otto-von-Guericke-Universität, Magdeburg (Germany), S. Woeckel, H. Arndt, J. Auge - Institut für Automation und Kommunikation (ifak) e.V., Magdeburg (Germany)
- 334 - 338
The misalignment of acoustic sensors is one of the most crucial reasons for malfunction in case of level detection. Further some applications do not grant a sensor position perpendicular to the surface. By simple improvement of the transducer and applying a linear propagation model the current contribution proposes a solution to compensate the misalignment in case of non-invasive (clamp-on) fluid level detection applications. In the range of the acoustic divergence spread, the tilt angle can be
identified and the sound propagation path and corresponding roundtrip time - used for level estimation – corrected. The bases are a simple linear triangulation with at least a three-element transducer and an automatic adaption of the acoustic excitation.