US4004464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and transducer and apparatus for selectively measuring oscillation components from an oscillation spectrum
Assignee: Gebr Hofmann GmbH and Co KG Maschinenfabrik
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Filing: 1975-08-12
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Granted: 1977-01-25
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Expires: 1995-08-12
Abstract
Abstract A method and apparatus for selectively measuring oscillation components and vectors in a spectrum, particularly produced by detecting unbalance of a rotary body, with a transducer which includes a pair of coils which move in an alternating magnetic field having an adjustable frequency and an integrating circuit connected to the transducer output so that the desired components are selected in the transducer and integrating circuit.
Inventors
- 👤 Gunther Himmler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:00
CPC Classifications
G; G01; G01H; G01H1/00; G01H1/003; G01H11/00; G01H11/02; G01M; G01M1/00; G01M1/14; G01M1/16; G01M1/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A method of selectively measuring oscillation components and oscillation vectors of a rotor in an oscillation spectrum with a transducer, comprising the steps of applying the oscillation movement to an induction device forming part of the transducer, providing a magnetic alternating field having an adjustable frequency which is kept constant at an integral multiple of the rotor frequency, producing from the operating movement of the induction device in the magnetic field an electrical alternating current voltage and integrating said voltage to produce a signal which is proportional to the amplitude of the oscillation component which is selected by the set adjustment of said constant frequency.
Claim 2
Independent Claim
105 words
A method of selectively measuring oscillation components and oscillation vectors of a rotor in an oscillation spectrum with a transducer, comprising the steps of applying the oscillation movement to an induction device forming part of the transducer, providing a magnetic alternating field having an adjustable frequency which is kept constant at an integral multiple of the rotor frequency, producing from the operating movement of the induction device in the magnetic field an electrical alternating current voltage and integrating said voltage to produce a signal which is proportional to the amplitude of the oscillation component which is selected by the set adjustment of said constant frequency.
Claim 3
Dependent Claim
54 words
A method according to claim 1, further including producing a sine-related and a cosine-related reference voltage by detecting the output of the transducer produced by said rotor and combining said sine-related and cosine-related voltages with the integrated voltages to produce electrical alternating-current voltages at unbalance measuring frequency and to determine two unbalance vector components.
Claim 4
Dependent Claim
53 words
A method according to claim 2 including producing and vectorially adding two said electrical alternating-current voltages at unbalance-measuring frequency, which respectively represent said two unbalance vector components, and determining the phase position of the unbalance by phase comparison of the signal produced from the vectorial addition operation, with one of said reference voltages.
Claim 5
Dependent Claim
87 words
Apparatus for selectively measuring oscillation components and oscillation vectors of a rotor in an oscillation movement spectrum comprising: a transducer for sensing the oscillation movements of said rotor, said transducer including means for producing an alternating magnetic field and at least one moving coil operatively connected to the alternating magnetic field, the frequency of the alternating magnetic field being adjustable to a constant value at an integral multiple of the rotor frequency; and integrating means connected to the output of the transducer for providing an integrated signal.
Claim 6
Dependent Claim
87 words
Apparatus for selectively measuring oscillation components and oscillation vectors of a rotor in an oscillation movement spectrum comprising: a transducer for sensing the oscillation movements of said rotor, said transducer including means for producing an alternating magnetic field and at least one moving coil operatively connected to the alternating magnetic field, the frequency of the alternating magnetic field being adjustable to a constant value at an integral multiple of the rotor frequency; and integrating means connected to the output of the transducer for providing an integrated signal.
Claim 7
Dependent Claim
23 words
Apparatus according to claim 4, wherein the transducer includes means for producing a sine-related voltage and a cosine-related reference voltage from said rotor.
Claim 8
Dependent Claim
56 words
Apparatus according to claim 5 wherein said integrating means produces a plurality of current voltage outputs further including multiplying means connected to the output of said integrating means for multiplying the direct-current voltages delivered at the respective outputs of the integrating means by said sine and cosine alternating-current reference voltages corresponding to the rotary body frequencies.
Claim 9
Dependent Claim
64 words
Apparatus according to claim 6 further including summing means connected to the output of the multiplying means for geometrically summing the alternating-current voltages delivered by the multiplying means; and phase comparison means connected to the output of said summing means, for determining the phase position of the unbalance of the rotary body from the phase relation between said reference voltages and the summed voltages.
Claim 10
Dependent Claim
38 words
Apparatus according to claim 4 including two induction coils for forming two alternating magnetic fields which lie in mirror image to each other, and two moving coils which are movable in equal phase in the alternating magnetic fields.
Claim 11
Dependent Claim
37 words
Apparatus according to claim 8 wherein said moving coils are arranged on a common sensing rod and are arranged symmetrically with respect to a central plane that is perpendicular to the longitudinal dimension of the sensing rod.
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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |