US4060002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the determination of unbalance in rotating bodies
Assignee: Individual
•
Filing: 1975-06-12
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Granted: 1977-11-29
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Expires: 1995-06-12
Abstract
Abstract A balancing system for the determination of unbalance in rotating bodies in which noise problems are reduced by the formation of average values of the vibration signals generated by the rotating bodies, each average value corresponding to each of a number of angular positions of the rotating body. Transducers are used to convert the mechanical vibration of a rotating body to an electrical signal which is then periodically sampled with the value of the sample being stored in a memory cell. The samples for each revolution are then used to form either an average value or an exponential average value. The average values so obtained have a relatively high signal to noise ratio.
Inventors
- 👤 Angel J. Mortensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:26
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/14; G01M1/16; G01M1/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
An apparatus for determination of unbalance in rotating bodies consisting of: a test bench in which a body can be fixed and rotated, devices which measure the vibrations caused by the rotating body unbalances and convert mechanical vibrations or pressure variations to electrical signals, electronic instrument means to evaluate the amplitudes and angular positions of the unbalances from the electrical signals, said electronic instrument means comprising sampling circuits for sampling said signals, an angular position indicating device connected to said test bench and body which delivers corresponding signals for each of a predetermined number of angular positions, e.g. 100, to said sampling circuits for activating said circuits, and storing means in which predetermined fractions of the sampled signals are stored during a number of revolutions to form average values for each of the predetermined angular positions.
Claim 2
Independent Claim
136 words
An apparatus for determination of unbalance in rotating bodies consisting of: a test bench in which a body can be fixed and rotated, devices which measure the vibrations caused by the rotating body unbalances and convert mechanical vibrations or pressure variations to electrical signals, electronic instrument means to evaluate the amplitudes and angular positions of the unbalances from the electrical signals, said electronic instrument means comprising sampling circuits for sampling said signals, an angular position indicating device connected to said test bench and body which delivers corresponding signals for each of a predetermined number of angular positions, e.g. 100, to said sampling circuits for activating said circuits, and storing means in which predetermined fractions of the sampled signals are stored during a number of revolutions to form average values for each of the predetermined angular positions.
Claim 3
Dependent Claim
13 words
An apparatus according to claim 1, wherein the said storing means are capacitors.
Claim 4
Dependent Claim
14 words
An apparatus according to claim 1, wherein the said storing means are accumulating circuits.
Claim 5
Dependent Claim
17 words
An apparatus according to claim 3, comprising an analog-to-digital-converter to which the sampled instantaneous values are fed.
Claim 6
Dependent Claim
83 words
An apparatus according to claim 4, wherein the said angular position indicating device consists of a disc, or another body of revolution, which rotates with the rotating body and which has contact points placed at the points of intersection between concentric circles and radii for a disc, and between parallel perimeter lines and radial planes for a cylinder, said radii or radial planes corresponding to the predetermined angular positions so that the number and position of contact points correspond to the angular position.
Claim 7
Dependent Claim
27 words
An apparatus according to claim 5, wherein a synchronizing contact point is positioned at each point of intersection between one of the circles and the predetermined radii.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 5, comprising devices for display of the position of the said angular position indicating device, also during standstill.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |