Device for detecting an unbalance in a rotor of a centrifuge

Details Device for detecting an unbalance in a rotor of a centrifuge Device for detecting an unbalance in a rotor of a centrifuge

1998-01-16

2000-05-16

Williams, Hezron

Measuring and testing

Rotor unbalance

Dynamic

73 187, G01M 116

Patent

active

060620781

ABSTRACT:
The invention relates to an unbalance detector, such as for a centrifuge. The invention preferably comprises a pressure-sensitive static sensor, preferably in the form of a piezoelectric cable, which preferably is mounted on a stationary casing part and delivers an imbalance signal when it comes in mechanical contact with the rotor which has been deflected because of an imbalance. As an alternative, the sensor can also be mounted on the rotor and deliver the unbalance signal on coming in mechanical contact with the stationary casing part. According to another embodiment of the invention, the analysis stage for the unbalance signal has a test stage or simulation stage for testing the functionality of the unbalance detector.

REFERENCES:
patent: 3365934 (1968-01-01), Holz et al.
patent: 3422957 (1969-01-01), Fosler
patent: 4214179 (1980-07-01), Jacobson et al.
patent: 4491019 (1985-01-01), Wicki et al.
patent: 4972110 (1990-11-01), Gorodissky et al.
patent: 5659136 (1997-08-01), Koch et al.
Abstract of 2,619,214 FR.
Abstract of 412,885 EP.

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