GB1365381A - Methods for a determining the electrical resistivity of the subsoil and for apparatus therefor - Google Patents
Methods for a determining the electrical resistivity of the subsoil and for apparatus thereforInfo
- Publication number
- GB1365381A GB1365381A GB3849871A GB3849871A GB1365381A GB 1365381 A GB1365381 A GB 1365381A GB 3849871 A GB3849871 A GB 3849871A GB 3849871 A GB3849871 A GB 3849871A GB 1365381 A GB1365381 A GB 1365381A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reference signal
- transmitter
- subsoil
- determining
- methods
- 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
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/12—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with electromagnetic waves
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
1365381 Prospecting COMPAGNIE D'APPLICATIONS ET DE DIFFUSION DE TECHNIQUES NOUVELLES SarL 17 Aug 1971 [5 Oct 1970] 38498/71 Heading G1N The method of measuring sub-soil resistivity by transmitting an electromagnetic wave from a remote point to the point at which the sub-soil resistivity is to be determined, is characterized in that the received signal 1, Fig. 1 after amplification 2 and filtering 4 is multiplied 6 by a reference signal 8 of the same frequency as the transmitted signal and the phase of the reference signal is adjusted to maximize the output of the multiplier which is passed to a measuring circuit. The reference signal generator can be linked to the transmitter at the remote point, but if the distance is too great it is adequate to control both the transmitter and the reference signal generator by matched crystal oscillators. The received signal may be recorded on magnetic tape before being replayed (possibly at a higher speed) to the processing circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7035879A FR2109154A5 (en) | 1970-10-05 | 1970-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1365381A true GB1365381A (en) | 1974-09-04 |
Family
ID=9062271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3849871A Expired GB1365381A (en) | 1970-10-05 | 1971-08-17 | Methods for a determining the electrical resistivity of the subsoil and for apparatus therefor |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS477603A (en) |
| AU (1) | AU3385371A (en) |
| BR (1) | BR7106084D0 (en) |
| CA (1) | CA977417A (en) |
| DE (1) | DE2149354A1 (en) |
| FR (1) | FR2109154A5 (en) |
| GB (1) | GB1365381A (en) |
| HU (1) | HU166508B (en) |
| NL (1) | NL7112667A (en) |
| ZA (1) | ZA715853B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51109251A (en) * | 1975-03-22 | 1976-09-28 | Dengensha Mfg Co Ltd | Teikoyosetsunyoru kinzokukoirunomakidomehoho |
| DE4133863A1 (en) * | 1991-10-12 | 1993-04-15 | Falko Dr Kuhnke | RF subterranean electrical resistance measuring appts. - has electrical and magnetic field sensors, superheterodyne signal processing and evaluation of amplitude and phases by sample=and=hold system |
| WO2019151422A1 (en) * | 2018-01-31 | 2019-08-08 | キヤノン電子株式会社 | Inspection device |
-
1970
- 1970-10-05 FR FR7035879A patent/FR2109154A5/fr not_active Expired
-
1971
- 1971-08-17 GB GB3849871A patent/GB1365381A/en not_active Expired
- 1971-09-01 ZA ZA715853A patent/ZA715853B/en unknown
- 1971-09-07 CA CA122,259A patent/CA977417A/en not_active Expired
- 1971-09-15 NL NL7112667A patent/NL7112667A/xx unknown
- 1971-09-16 BR BR6084/71A patent/BR7106084D0/en unknown
- 1971-09-23 AU AU33853/71A patent/AU3385371A/en not_active Expired
- 1971-10-02 DE DE19712149354 patent/DE2149354A1/en active Pending
- 1971-10-04 HU HUTE619A patent/HU166508B/hu unknown
- 1971-10-06 JP JP7827671A patent/JPS477603A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BR7106084D0 (en) | 1973-03-29 |
| ZA715853B (en) | 1973-06-27 |
| JPS477603A (en) | 1972-04-24 |
| DE2149354A1 (en) | 1972-05-31 |
| CA977417A (en) | 1975-11-04 |
| AU3385371A (en) | 1973-03-29 |
| HU166508B (en) | 1975-03-28 |
| NL7112667A (en) | 1972-04-07 |
| FR2109154A5 (en) | 1972-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2431854A (en) | Apparatus for suppressing reverberation | |
| FR2368048A1 (en) | CONTINUOUS DIRECT MEASUREMENT AND RECEPTION DEVICE OF MAGNETIC ELECTRIC SIGNALS. | |
| US3105934A (en) | Method and apparatus for the remote detection of ore bodies utilizing pulses of short duration to induce transient polarization in the ore bodies | |
| GB1365282A (en) | Tunnel location and plotting method | |
| ES386865A1 (en) | Induction logging methods and apparatus using more than one phase component of the received signal | |
| GB1011604A (en) | Method and apparatus for geophysical exploration | |
| GB1531827A (en) | Alarm system for detecting disturbance of a solid medium | |
| GB1456009A (en) | Method for exciting and detecing resonant oscillations from electronic conductors in the earth | |
| FR2433789A1 (en) | METHOD AND SYSTEM FOR CONTROLLING THE PERFORMANCE OF AN ELECTRONIC DEVICE, SUCH AS A SEMICONDUCTOR LASER | |
| ES369155A1 (en) | Geophysical prospecting with electromagnetic waves of extremely low frequency | |
| GB1365381A (en) | Methods for a determining the electrical resistivity of the subsoil and for apparatus therefor | |
| GB1294484A (en) | Method of electromagnetic prospecting | |
| FR2371091A1 (en) | PHASE CONTROL DEVICE OF A CARRIER WAVE AND SIDE BANDS GENERATED BY A TRANSMITTER, IN PARTICULAR BY A RADIONAVIGATION TRANSMITTER, AND RADIONAVIGATION TRANSMITTER INCLUDING SUCH A DEVICE | |
| GB2012422A (en) | Apparatus and Method for Determining Velocity of Acoustic Waves in Earth Formations | |
| ES8308459A1 (en) | A method of bringing an oscillator into phase with an incoming signal and an apparatus for carrying out the method. | |
| GB1351912A (en) | Method and device for determining the depth of a magnetic anomaly | |
| CA1008131A (en) | Apparatus for determining electromagnetic characteristics of earth formations using constant flux field generators | |
| US3551798A (en) | Method for geophysical exploration with signals conforming to an exponential law | |
| GB1390016A (en) | Method of fault location on electric transmission and distribution systems | |
| GB1251810A (en) | ||
| US3801896A (en) | Method for determining the electrical resistivity of the subsoil by electromagnetic surface waves and apparatus for subsoil prospecting by measuring electromagnetic fields | |
| JP3130442B2 (en) | Underground electromagnetic exploration method and apparatus in front of tunnel face | |
| JPS5341744A (en) | Anomalousness detector for transmission signal | |
| JPS5635002A (en) | Meandering detector for metal strip | |
| SU409169A1 (en) | DEVICE FOR REGISTRATION OF EXTREME SEASMIC SIGNAL |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |