Patent US5609605A successfully refreshed from Google Patents.
US4004454A
Expired / Lapsed
US
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Ultrasonic inspection method of pulse reflection defect detection using a thru-transmission automatic distance-amplitude compensation
Assignee: Ex-Cell-O Corp
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Filing: 1975-05-07
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Granted: 1977-01-25
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Expires: 1995-05-07
Abstract
Abstract An automatic distance amplitude correction device for automatically correcting for amplitude variations and signals caused by the attenuation of sound propagating through a test specimen wherein a signal is transmitted through a test specimen and the reflection is detected and furthermore, a through signal is detected after the signal has passed through the test specimen only a single time and utilized to provide improved automatic distance amplitude compensation.
Inventors
- 👤 Istvan M. Matay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:53
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/52; G01S7/52004; G01N; G01N29/00; G01N29/04; G01N29/06; G01N29/0609; G01N29/0645; G01N29/36; G01N29/40; G01N29/44; G01N29/4463
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
93 words
A pulse echo inspection device including a receiver having variable gain control means for testing a specimen comprising, first transducer means for periodically transmitting a signal into said specimen from one side thereof, and supplying echoes to said receiver, a second transducer means mounted on the opposite side of said specimen and receiving directly transmitted signals from said first transducer means, and an automatic distance-amplitude correcting device receiving the output of said second transducer means and producing a gain control signal which is supplied to said variable gain control means of said receiver.
Claim 2
Dependent Claim
93 words
A pulse echo inspection device including a receiver having variable gain control means for testing a specimen comprising, first transducer means for periodically transmitting a signal into said specimen from one side thereof, and supplying echoes to said receiver, a second transducer means mounted on the opposite side of said specimen and receiving directly transmitted signals from said first transducer means, and an automatic distance-amplitude correcting device receiving the output of said second transducer means and producing a gain control signal which is supplied to said variable gain control means of said receiver.
Claim 3
Dependent Claim
21 words
A device according to claim 1 including means for indicating defects in said specimen connected to the output of said receiver.
Claim 4
Dependent Claim
46 words
A device according to claim 1 wherein said specimen is of a size and attenuation such that echoes from its center return to said first transducer means with sufficient intensity to be consistently detected and said second transducer means consistently detects energy from said first transducer.
Claim 5
Dependent Claim
41 words
A device according to claim 1 including a peak detector connected to said second transducer and a sample hold circuit connected to said peak detector, a distance amplitude correcting device, said sample hold circuit connected to said distance amplitude correcting device.
Claim 6
Dependent Claim
64 words
A device according to claim 4 including means for pulsing said first transducer means, a gated amplifier between said second transducer and said automatic distance amplitude correcting device and said gated amplifier passing signals during times when said second transducer means expects to receive energy from said first transducer means and said gated amplifier controlled by said means for pulsing said first transducer means.
Claim 7
Dependent Claim
31 words
A device according to claim 4 including a sample duration generator connected to said sample hold circuit to reset it, and means connecting said sample duration generator to said second transducer.
Claim 8
Dependent Claim
35 words
A device according to claim 6, including a time generator connected to said means for pulsing, a duration generator forming a part of said automatic distance amplitude correcting device and connected to said time generator.
Claim 9
Dependent Claim
26 words
A device according to claim 7 including, a delay generator forming a part of said automatic distance amplitude correcting device and connected to said time generator.
Claim 10
Independent Claim
57 words
The method of testing specimens comprising, transmitting ultrasonic energy into said specimen from one side and detecting echoes at said one side, detecting ultrasonic energy on the other side of said specimen, amplifying the echoes received on said one side and adjusting the amplifying gain as a function of the ultrasonic energy detected on said other side.
Claim 11
Independent Claim
57 words
The method of testing specimens comprising, transmitting ultrasonic energy into said specimen from one side and detecting echoes at said one side, detecting ultrasonic energy on the other side of said specimen, amplifying the echoes received on said one side and adjusting the amplifying gain as a function of the ultrasonic energy detected on said other side.
Claim 12
Dependent Claim
23 words
The method of claim 9 wherein detecting energy on said other side occurs during periods when energy from said one side is expected.
References Cited (Backward Citations)
US3033029A
Cited
US3690153A
Cited
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 |