Non-intrusive determination of time varying and steady state torsional load magnitudes and locations of a shaft or system of shafts
US5038616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1989 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Nov 2, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A nonintrusive method for determining the magnitudes and spatial and temporal origins of individual dynamic (time varying) torsion loads acting in superposition on a rotating shaft or system of shafts includes combining the measurements of said shaft's inertial response to the dynamic torsion loads with the measurements of discrete relative angular displacement parameters at causally connected space-time points. Changes in the shaft's characteristics, such as those due to change in its temperature or degradation of its structural integrity, can be monitored to provide updated torque determinations that maintain accuracy by taking these changes into account and to provide information on the onset and location of shaft fractures. Apparatus based on the method of this invention is self calibrating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.