JPS6412288A - Detecting method of stratum surface and underground object and its apparatus - Google Patents
Detecting method of stratum surface and underground object and its apparatusInfo
- Publication number
- JPS6412288A JPS6412288A JP62168095A JP16809587A JPS6412288A JP S6412288 A JPS6412288 A JP S6412288A JP 62168095 A JP62168095 A JP 62168095A JP 16809587 A JP16809587 A JP 16809587A JP S6412288 A JPS6412288 A JP S6412288A
- Authority
- JP
- Japan
- Prior art keywords
- spectrum
- direct current
- current component
- underground
- reflecting
- 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.)
- Granted
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
PURPOSE:To detect stratum interface precisely and highly accurately by computing spectrum peak frequency, direct current component ratio and half width from the spectrum distribution of a received reflected signal. CONSTITUTION:When elastic waves are radiated into the underground 8 by the use of an excitating device 1, reflecting waves which are reflected from various stratum interfaces in the underground 8 are received by a receiver 2 as a observation signal, namely, a reflecting signal having wideband frequency characteristics. This observation signal is transmitted to an arithmetic unit 4, a power spectrum is called for by converting it into a frequency domain by the means of high speed conversion processing. Next, spectrum frequency fP, spectrum strength IP, direct current component strength Idc and half width W are read from the spectrum distribution and direct current component ratio Rdc is computed. After spectrum peak frequency fP, direct current component ratio Rdc and peak width at half height W are obtained, the distribution of said value is examined, unnecessary reflecting signals are removed, and the reflecting signals from the stratum interface and the cross section of the underground are shown in a display.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62168095A JPH077066B2 (en) | 1987-07-06 | 1987-07-06 | Method and apparatus for detecting formation interface and buried object |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62168095A JPH077066B2 (en) | 1987-07-06 | 1987-07-06 | Method and apparatus for detecting formation interface and buried object |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6412288A true JPS6412288A (en) | 1989-01-17 |
JPH077066B2 JPH077066B2 (en) | 1995-01-30 |
Family
ID=15861749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62168095A Expired - Fee Related JPH077066B2 (en) | 1987-07-06 | 1987-07-06 | Method and apparatus for detecting formation interface and buried object |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH077066B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2759459A1 (en) * | 1997-02-13 | 1998-08-14 | Elf Aquitaine | METHOD OF AUTOMATIC FREQUENTIAL BANDWIDTH ANALYSIS OF RECORDED SIGNALS |
CN106324663A (en) * | 2015-06-17 | 2017-01-11 | 中国石油化工股份有限公司 | Method for obtaining quality factor |
JP2020148649A (en) * | 2019-03-14 | 2020-09-17 | 日本電気株式会社 | Device and method for estimating state of soil and program |
-
1987
- 1987-07-06 JP JP62168095A patent/JPH077066B2/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2759459A1 (en) * | 1997-02-13 | 1998-08-14 | Elf Aquitaine | METHOD OF AUTOMATIC FREQUENTIAL BANDWIDTH ANALYSIS OF RECORDED SIGNALS |
WO1998036293A1 (en) * | 1997-02-13 | 1998-08-20 | Elf Exploration Production | Method for the automatic analysis of frequency passband of recorded signals |
CN106324663A (en) * | 2015-06-17 | 2017-01-11 | 中国石油化工股份有限公司 | Method for obtaining quality factor |
CN106324663B (en) * | 2015-06-17 | 2018-10-02 | 中国石油化工股份有限公司 | A kind of acquisition methods of quality factor |
JP2020148649A (en) * | 2019-03-14 | 2020-09-17 | 日本電気株式会社 | Device and method for estimating state of soil and program |
Also Published As
Publication number | Publication date |
---|---|
JPH077066B2 (en) | 1995-01-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |