US4689993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring and mapping vibrations
Assignee: Individual
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Filing: 1986-06-18
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Granted: 1987-09-01
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Expires: 2006-06-18
Abstract
Abstract A method and a device for measuring and mapping vibrations wherein one or a number of local sensors and a measuring means can make local registrations and frequency decompositions of the vibrations of an oscillating object. The same sensors and measuring means may be used in combination with an image-forming unit and an associated measuring means for local and image-forming recording of the vibrations of an oscillating object, respectively. By oscillating an excitation source an object can be made to oscillate harmonically. Furthermore, the local and image-forming measurements are collocated with the aid of a means for calculation.
Inventors
- 👤 Gudmunn Slettemoen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:00
CPC Classifications
G; G01; G01H; G01H9/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
105 words
A method for measuring and mapping vibrations comprising the steps of: making local registrations and frequency decompositions of the vibrations of an oscillating object to be examined with at least one local sensor and a first means for measuring; causing the object to be examined to oscillate harmonically with aid of an oscillating source of excitation; using said local sensors and said first means for measuring in combination with an image-forming unit and a second associated means for measuring for local recording and image-forming recording of the vibrations of an oscillating object; and collocating said local recordings and image-forming recordings by a means for calculation.
Claim 2
Independent Claim
105 words
A method for measuring and mapping vibrations comprising the steps of: making local registrations and frequency decompositions of the vibrations of an oscillating object to be examined with at least one local sensor and a first means for measuring; causing the object to be examined to oscillate harmonically with aid of an oscillating source of excitation; using said local sensors and said first means for measuring in combination with an image-forming unit and a second associated means for measuring for local recording and image-forming recording of the vibrations of an oscillating object; and collocating said local recordings and image-forming recordings by a means for calculation.
Claim 3
Independent Claim
113 words
A device for measuring and mapping vibrations, comprising: at least one local sensor; a first means for measuring associated with said local sensor for making local registrations and frequency decompositions of the vibrations of an oscillating object to be examined; an image forming unit; a second means for measuring associated with said image forming unit to be used in combination with said local sensors and said first means for measuring to provide image-forming recording and local recording of the vibrations of an oscillating object, respectively; an oscillating source of excitation which causes the object to be examined to oscillate harmonically; and a means for calculation to collocate said local recordings and image-forming recordings.
Claim 4
Independent Claim
113 words
A device for measuring and mapping vibrations, comprising: at least one local sensor; a first means for measuring associated with said local sensor for making local registrations and frequency decompositions of the vibrations of an oscillating object to be examined; an image forming unit; a second means for measuring associated with said image forming unit to be used in combination with said local sensors and said first means for measuring to provide image-forming recording and local recording of the vibrations of an oscillating object, respectively; an oscillating source of excitation which causes the object to be examined to oscillate harmonically; and a means for calculation to collocate said local recordings and image-forming recordings.
Claim 5
Dependent Claim
13 words
A device according to claim 2 wherein said local sensor is a microphone.
Claim 6
Dependent Claim
13 words
A device according to claim 2 wherein said local sensor is an accelerometer.
Claim 7
Dependent Claim
14 words
A device according to claim 2 wherein said local sensor is a piezoelectric crystal.
Claim 8
Dependent Claim
15 words
A device according to claim 2 wherein said local sensor is an eddy current sensor.
Claim 9
Dependent Claim
14 words
A device according to claim 2 wherein said local sensor is a photomultiplier tube.
Claim 10
Dependent Claim
14 words
A device according to claim 2 wherein said local sensor is a semiconductor diode.
Claim 11
Dependent Claim
14 words
A device according to claim 2 wherein said image-forming unit is a free space.
Claim 12
Dependent Claim
16 words
A device according to claim 2 wherein said image-forming unit is a lens and mirror arrangement.
Claim 13
Dependent Claim
14 words
A device according to claim 2 wherein said image-forming unit is a mirror arrangement.
Claim 14
Dependent Claim
17 words
A device according to claim 2 wherein said second means for measuring is a TV-based holographic interferometer.
Claim 15
Dependent Claim
18 words
A device according to claim 2 wherein said second means for measuring is a film based holographic interferometer.
Claim 16
Dependent Claim
16 words
A device according to claim 2 wherein second means for measuring is a TV-base moire instrument.
Claim 17
Dependent Claim
17 words
A device according to claim 2 wherein said second means for measuring is a film-based moire instrument.
Claim 18
Dependent Claim
17 words
A device according to claim 2 wherein said second means for measuring is a stroboscopic image-forming mechanism.
Claim 19
Dependent Claim
21 words
A device according to claim 2 wherein an electronic spectrum analyzer performs the frequency decompositions in said first means for measuring.
Claim 20
Dependent Claim
22 words
A device according to claim 2 wherein a variably set electronic filter performs the frequency decompositions in said first means for measuring.
Claim 21
Dependent Claim
22 words
A device according to claim 2 wherein a firmly set electronic filter performs the frequency decompositions in said first means for measuring.
Claim 22
Dependent Claim
21 words
A device according to claim 2 wherein an electronic filter bank performs the frequency decompositions in said first means for measuring.
Claim 23
Dependent Claim
14 words
A device according to claim 2 wherein said means for calculation is a computer.
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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |