ES473174A1 - Method and apparatus for acoustic signal detection - Google Patents
Method and apparatus for acoustic signal detectionInfo
- Publication number
- ES473174A1 ES473174A1 ES473174A ES473174A ES473174A1 ES 473174 A1 ES473174 A1 ES 473174A1 ES 473174 A ES473174 A ES 473174A ES 473174 A ES473174 A ES 473174A ES 473174 A1 ES473174 A1 ES 473174A1
- Authority
- ES
- Spain
- Prior art keywords
- transit time
- cycles
- acoustic signal
- negative
- zero crossing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
- G01V1/44—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging using generators and receivers in the same well
- G01V1/48—Processing data
- G01V1/50—Analysing data
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The disclosure relates to a method and apparatus for acoustic signal detection, adapted for use in acoustic velocity well logging to measure the difference in transit times of an acoustic signal between a transmitter and two or more receivers. In a preferred embodiment of the present invention two timing measurements of the signal R1s, R2s arriving at each of two receivers (R1, R2 Fig. 1, not shown) may be made by activating zero crossing detectors at the arrival of the first negative and first positive half- cycles at each receiver. A transit time is calculated from the zero crossing times following the first negative half-cycle. This first transit time A'-A may be checked for accuracy by comparing the first transit time with a second transit time B'-B calculated from zero crossing times following the first positive half-cycles, by comparing the first transit time to a previously measured transit time and/or by detecting the order of arrival of the negative and positive half-cycles to determine whether the half-cycles have been detected out of sequence at either receiver. Should the first transit time be determined to be inaccurate, the previously measured transit time or the second transit time may be substituted therefor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US83129577A | 1977-09-07 | 1977-09-07 | |
US05/937,251 US4223398A (en) | 1978-08-31 | 1978-08-31 | Method for acoustic signal detection |
Publications (1)
Publication Number | Publication Date |
---|---|
ES473174A1 true ES473174A1 (en) | 1979-10-16 |
Family
ID=27125430
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES473174A Expired ES473174A1 (en) | 1977-09-07 | 1978-09-07 | Method and apparatus for acoustic signal detection |
ES480170A Expired ES480170A1 (en) | 1977-09-07 | 1979-05-02 | Method and apparatus for acoustic signal detection |
ES480169A Expired ES480169A1 (en) | 1977-09-07 | 1979-05-02 | Method and apparatus for acoustic signal detection |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES480170A Expired ES480170A1 (en) | 1977-09-07 | 1979-05-02 | Method and apparatus for acoustic signal detection |
ES480169A Expired ES480169A1 (en) | 1977-09-07 | 1979-05-02 | Method and apparatus for acoustic signal detection |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU3962878A (en) |
CA (1) | CA1116737A (en) |
EG (1) | EG13408A (en) |
ES (3) | ES473174A1 (en) |
GB (1) | GB2011618B (en) |
NL (1) | NL7809088A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4852067A (en) * | 1983-05-31 | 1989-07-25 | Schlumberger Well Services | Low frequency sonic logging |
US4692905A (en) * | 1984-08-21 | 1987-09-08 | Institut Fiziki Zemli Imeni O.Ju. Shmidta Akademii Nauk Sssr | Method for geophysical prospecting of complex orebodies |
US4985873A (en) * | 1989-10-20 | 1991-01-15 | Schlumberger Technology Corporation | Method and apparatus for determining compressional first arrival times from waveform threshold crossings provided by apparatus disposed in a sonic well tool |
-
1978
- 1978-09-06 CA CA000310686A patent/CA1116737A/en not_active Expired
- 1978-09-06 NL NL7809088A patent/NL7809088A/en not_active Application Discontinuation
- 1978-09-07 GB GB7836037A patent/GB2011618B/en not_active Expired
- 1978-09-07 ES ES473174A patent/ES473174A1/en not_active Expired
- 1978-09-07 AU AU39628/78A patent/AU3962878A/en active Pending
- 1978-09-09 EG EG54978A patent/EG13408A/en active
-
1979
- 1979-05-02 ES ES480170A patent/ES480170A1/en not_active Expired
- 1979-05-02 ES ES480169A patent/ES480169A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA1116737A (en) | 1982-01-19 |
NL7809088A (en) | 1979-03-09 |
EG13408A (en) | 1981-12-31 |
AU3962878A (en) | 1980-03-13 |
GB2011618A (en) | 1979-07-11 |
ES480169A1 (en) | 1979-12-16 |
GB2011618B (en) | 1982-04-15 |
ES480170A1 (en) | 1979-12-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ATE59700T1 (en) | DIGITAL CIRCUIT FOR A FLOW METER AND METHOD OF FLOW MEASUREMENT. | |
US3437834A (en) | Circuit for detecting time of occurrence of signals having an amplitude which exceeds a predetermined level | |
EP0249292A3 (en) | Radio direction-finding using time of arrival measurements | |
JPS6468627A (en) | Acoustic high temperature measuring apparatus and method | |
KR910008387A (en) | Measuring system | |
ATE125075T1 (en) | METHOD AND DEVICE FOR DETERMINING GROUPS. | |
KR910005596A (en) | Radio receiver | |
ES473174A1 (en) | Method and apparatus for acoustic signal detection | |
SU941776A1 (en) | Device for automatic location of pipeline damages | |
NO892411L (en) | ECO-TRACKING SYSTEM FOR A ULTRAS SOUND MEASUREMENT OF THE MOBILE WALL POSITION. | |
JPS57179678A (en) | Ultrasonic method and device for detecting distance | |
SU1019321A1 (en) | Material acoustic emission checking device | |
JPS5587022A (en) | Leakage position detector | |
DK373388A (en) | PROCEDURE FOR RADIO-ELECTRIC LOCAL DETERMINATION OF A VESSEL WITH A RECEIVING DEVICE BY MEASURING THE DIFFERENCES BETWEEN THE RECEIPT OF RADIO-FREQUENT SIGNALS AND THE RECEIVING APPLICATION FOR EXCEPTION | |
SE9802394L (en) | Ways to measure the frequency of a sinusoidal signal | |
JPS6430127A (en) | Switching device operation time measuring system | |
JPH065253B2 (en) | Accident location method for cable tracks | |
SU1120269A1 (en) | Method of multichannel measurement of nuclear radiation intensity | |
GB1118504A (en) | Surface velocity measurement | |
SU1040418A1 (en) | Correlation-type speed meter | |
SU1624380A1 (en) | Method for remote optical sounding of scattering media | |
SU987393A1 (en) | Ultrasonic flow speed meter | |
SU650020A1 (en) | Switching meter of the difference on levels of two voltages of different frequencies | |
RU2658U1 (en) | DEVICE FOR MEASURING MATERIAL DEFORMATION SPEED | |
SU649013A1 (en) | Device for determining vehicle motion velocity |