Absorption dynamometer torque measuring device and calibration method
US5426986A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Jan 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/205
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is an in-line torque meter for use with an absorption dynamometer in which the twist of a rotating shaft that transmits torque from an engine to an air dynamometer is measured by a single sensor on the adjacent stationary structure. The torque shaft is supported at the dynamometer end by a splined attachment to the shaft of the dynamometer and at the engine end in a pair of preloaded angular contact ball bearings. Torque from the engine causes the shaft to twist. Attached to and rotating with the shaft are two sleeves with projecting teeth, one sleeve attached at each end of the torque shaft. The projecting teeth are interleaved and are located so that both sets of teeth can be sensed by an adjacent single sensor. When the shaft is twisted by the applied torque, the teeth on the two sleeves are angularly displaced with respect to each other. This angular displacement is measured as a phase shift in the signal generated by the sensor. The phase shift being directly proportional to the applied torque. The torque sensor is moveable past the teeth when the torque shaft is stationary. The movement of the torque sensor generates a signal representative of the torque or twis…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.