USH465H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acousto-ultrasonic monitoring
Assignee: United States, UNITED STATES AIR FORCE THE, Secretary of
•
Filing: 1987-05-12
•
Granted: 1988-05-03
•
Expires: 2007-05-12
Abstract
Abstract An ultrasonic nondestructive system and method for monitoring resin cure during composite sheet material fabrication is described which comprises a first transducer for directing a plurality of ultrasonic pulses of preselected pulse frequency along a selected propagation axis onto a first surface of the material during the curing of the resin, a second transducer near the second surface of the material for receiving transmitted pulses and for providing output signals characteristic of the transmitted pulses, and electronic signal processor and display equipment responsive to signals from the second transducer for analyzing the signals and providing output corresponding to the amplitude and duration of the transmitted pulses.
Inventors
- 👤 Scott C. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:36
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/36; G01N29/38; G01N29/04; G01N29/11; G01N2291/00; G01N2291/02; G01N2291/023; G01N2291/0231; G01N2291/0237; G01N2291/025; G01N2291/0251; G01N2291/04; G01N2291/048
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A system for monitoring resin cure in the fabrication of composite sheet material, comprising: (a) first transducer means for directing a plurality of ultrasonlc pulses of preselected pulse frequency along a selected propagation axis onto a first surface of composite sheet material containing resin for curing; (b) second transducer means disposed along said axis near the second surface of said material for receiving the ultrasonic pulses transmitted through said material and for providing output signals characteristic of the transmitted pulses received by said second transducer means; and (c) electronic means responsive to said signals from said second transducer means for analyzing said signals and providing output corresponding to the amplitude and duration of said transmitted pulses.
Claim 2
Independent Claim
116 words
A system for monitoring resin cure in the fabrication of composite sheet material, comprising: (a) first transducer means for directing a plurality of ultrasonlc pulses of preselected pulse frequency along a selected propagation axis onto a first surface of composite sheet material containing resin for curing; (b) second transducer means disposed along said axis near the second surface of said material for receiving the ultrasonic pulses transmitted through said material and for providing output signals characteristic of the transmitted pulses received by said second transducer means; and (c) electronic means responsive to said signals from said second transducer means for analyzing said signals and providing output corresponding to the amplitude and duration of said transmitted pulses.
Claim 3
Dependent Claim
22 words
The system recited in claim 1 wherein said preselected frequency is in the range of from about 100 to about 300 KHz.
Claim 4
Independent Claim
81 words
A method for monitoring resin cure in the fabrication of composite sheet material comprising the steps of: (a) directing a plurality of ultrasonic pulses of preselected pulse frequency along a selected propagation axis onto a first surface of composite sheet material containing resin for curing; (b) receiving the ultrasonic pulses transmitted through said material and providing output signals characteristic of the transmitted pulses; and (c) analyzing said signals and providing output corresponding to the amplitude and duration of said transmitted pulses.
Claim 5
Independent Claim
81 words
A method for monitoring resin cure in the fabrication of composite sheet material comprising the steps of: (a) directing a plurality of ultrasonic pulses of preselected pulse frequency along a selected propagation axis onto a first surface of composite sheet material containing resin for curing; (b) receiving the ultrasonic pulses transmitted through said material and providing output signals characteristic of the transmitted pulses; and (c) analyzing said signals and providing output corresponding to the amplitude and duration of said transmitted pulses.
Claim 6
Dependent Claim
22 words
The method recited in claim 3 wherein said preselected frequency is in the range of from about 100 to about 300 KHz.
References Cited (Backward Citations)
US3654072A
Cited
US4327587A
Cited
US4325255A
Cited
US4428237A
Cited
US4469450A
Cited
US4494408A
Cited
US4552781A
Cited
US4590803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |