Measuring and testing – Rotor unbalance – Dynamic
Patent
1983-01-26
1985-08-20
Gill, James J.
Measuring and testing
Rotor unbalance
Dynamic
73 1B, G01M 122
Patent
active
RE0319716
ABSTRACT:
An off-the-car wheel unbalance measuring system has a rotationally driven wheel mounting shaft supported in a pedestal together with a pair of force transducers mounted in the pedestal adjacent to and spaced along the shaft. The force transducers are coupled mechanically to the shaft and provide periodic electrical output signals indicative of unbalance forces transmitted through the shaft when the shaft is driven rotationally. The angular position of the shaft is monitored with respect to an angular reference position at a predetermined number of angular increments during each full revolution of the shaft. The transducer output signals are converted in electrical circuitry within the system to digital form, and a multiplication operation is performed on the digitized signals at each angular increment using sine and cosine representative factors corresponding to that particular angular increment. The sine and cosine factors are stored in memory and are called up from storage in accordance with the monitored angular position of the shaft. The system circuitry operates to sum the digitized signals including sine and cosine factors thereby providing operating data from which unbalance force magnitude and angular position is calculated. Operation of the system while a known unbalance is mounted on the shaft and also while the shaft is running free provides data from which calibration constants for the system are calculated and thereafter applied to the operating data to correct unbalance measurements for shaft unbalance and transducer idiosyncrasies.
REFERENCES:
patent: 2243379 (1941-05-01), Johnson
patent: 2331733 (1943-10-01), Senger
patent: 3205713 (1965-09-01), Thomas et al.
patent: 3380286 (1968-04-01), Porter
patent: 3527103 (1970-09-01), Hale et al.
patent: 3680390 (1972-08-01), Bjorn
patent: 3751987 (1973-08-01), Whitmore
patent: 4015480 (1977-04-01), Giers
patent: 4018087 (1977-04-01), Wenz
patent: 4046017 (1977-09-01), Hill
patent: 4109312 (1978-08-01), Beutel
patent: 4169383 (1979-10-01), Guyot et al.
patent: 4173146 (1979-11-01), Kogler et al.
FMC Corporation
Gill James J.
Megley R. B.
Stanley H. M.
LandOfFree
Wheel unbalance measurement system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wheel unbalance measurement system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wheel unbalance measurement system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-552797