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Patent US3746121A successfully refreshed from Google Patents.
US3746121A
Expired / Lapsed
US
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Ultrasound pulse echo method and apparatus for determining acoustic velocity of materials
Assignee: Individual
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Filing: 1970-10-14
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Granted: 1973-07-17
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Expires: 1990-10-14
Abstract
Abstract A method and apparatus for determining directly the acoustic velocity cm of a material from the comparison of the ultrasonic pulse echoes obtained from the material positioned on the bottom surface of a fluid bath container with the ultrasonic pulse echoes received from the bottom of the bath container with the material removed therefrom. A cathode ray display apparatus incorporating an expandable pusle echo time base and a fixed calibrated acoustic velocity scale are employed for a direct reading from the scale of the acoustic velocity of the material.
Inventors
- 👤 L Niklas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:15
CPC Classifications
G; G01; G01H; G01H5/00; G01N; G01N29/00; G01N29/04; G01N29/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
The method for determining the acoustic velocity of a sample material comprising the steps of irradiating the sample material on the bottom of a container of fluid which has a known acoustic velocity with an acoustic pulse to obtain both a pulse echo from the entry surface of the material and a pulse echo from the backwall of the material on a time base, irradiating the container fluid with another acoustic pulse with the sample material removed from the bath to obtain an echo pulse from the bottom surface of the container on said time base, aligniNg the zero value graduation of an acoustic velocity scale with the entry surface echo pulse on the time base, expanding the time base until the backwall echo pulse coincides with the graduation on the acoustic velocity scale designating the known acoustic velocity of the fluid, and obtaining the acoustic velocity reading of the material from the acoustic velocity scale at the position of the bottom echo pulse.
Claim 2
Independent Claim
164 words
The method for determining the acoustic velocity of a sample material comprising the steps of irradiating the sample material on the bottom of a container of fluid which has a known acoustic velocity with an acoustic pulse to obtain both a pulse echo from the entry surface of the material and a pulse echo from the backwall of the material on a time base, irradiating the container fluid with another acoustic pulse with the sample material removed from the bath to obtain an echo pulse from the bottom surface of the container on said time base, aligniNg the zero value graduation of an acoustic velocity scale with the entry surface echo pulse on the time base, expanding the time base until the backwall echo pulse coincides with the graduation on the acoustic velocity scale designating the known acoustic velocity of the fluid, and obtaining the acoustic velocity reading of the material from the acoustic velocity scale at the position of the bottom echo pulse.
Claim 3
Dependent Claim
85 words
The method as claimed in claim 1 comprising the step of generating a marker pulse delayed a selected time from the initial acoustic pulse, the marker pulse being made to coincide on said time base with said bottom echo pulse, said time base being expanded so that said backwall echo pulse on said time base coincides with said fluid acoustic velocity graduation on said scale, said marker pulse on said expanded time base coinciding with the acoustic velocity graduation of said material on said scale.
Claim 4
Dependent Claim
51 words
The method as claimed in claim 2 including the step of determining the transit time between the entry echo and the marker pulse, dividing this value by the transit time between the entry echo pulse and backwall echo pulse, and multiplying the result by the known acoustic velocity of the fluid.
Claim 5
Dependent Claim
171 words
Apparatus for determining the acoustic velocity of a sample material comprising means for irradiating the sample material on the bottom of a container of fluid which has a known acoustic velocity with an acoustic pulse to obtain both a pulse echo from the entry surface of the material and a pulse echo from the backwall of the material on a time base, said means operating to irradiate the container fluid with another acoustic pulse with the sample material removed from the bath to obtain an echo pulse from the bottom surface of the container on said time base, means for aligning the zero value graduation of an acoustic velocity scale with the entry surface echo pulse on the time base, and means for expanding the time base until the backwall echo pulse coincides with the graduation on the acoustic velocity scale designating the known acoustic velocity of the fluid, the acoustic velocity reading of the material being obtained from the acoustic velocity scale at the position of the bottom echo pulse.
Claim 6
Dependent Claim
171 words
Apparatus for determining the acoustic velocity of a sample material comprising means for irradiating the sample material on the bottom of a container of fluid which has a known acoustic velocity with an acoustic pulse to obtain both a pulse echo from the entry surface of the material and a pulse echo from the backwall of the material on a time base, said means operating to irradiate the container fluid with another acoustic pulse with the sample material removed from the bath to obtain an echo pulse from the bottom surface of the container on said time base, means for aligning the zero value graduation of an acoustic velocity scale with the entry surface echo pulse on the time base, and means for expanding the time base until the backwall echo pulse coincides with the graduation on the acoustic velocity scale designating the known acoustic velocity of the fluid, the acoustic velocity reading of the material being obtained from the acoustic velocity scale at the position of the bottom echo pulse.
Claim 7
Dependent Claim
42 words
Apparatus as claimed in claim 4 including means for displaying the pulses along said time base on a cathode ray screen, said velocity scale being superimposed on said screen such that said pulses may be aligned with selected graduation along said scale.
Claim 8
Dependent Claim
24 words
Apparatus as claimed in claim 5 wherein said scale is provided with a graduation at the point of the acoustic velocity of said fluid.
References Cited (Backward Citations)
US3088540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |