GB827842A - Improvements in or relating to apparatus for detecting and exploring electrically conductive bodies - Google Patents
Improvements in or relating to apparatus for detecting and exploring electrically conductive bodiesInfo
- Publication number
- GB827842A GB827842A GB3543/56A GB354356A GB827842A GB 827842 A GB827842 A GB 827842A GB 3543/56 A GB3543/56 A GB 3543/56A GB 354356 A GB354356 A GB 354356A GB 827842 A GB827842 A GB 827842A
- Authority
- GB
- United Kingdom
- Prior art keywords
- receiver
- coils
- difference
- transmitter
- rate
- 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
- G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
- G01V3/165—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat operating with magnetic or electric fields produced or modified by the object or by the detecting device
Abstract
827,842. Geophysical surveying. HEDSTROM, E. H. L., and TEGHOLM, R. V. Feb. 3, 1956 [Feb. 3, 1955], No. 3543/56. Drawings to Specification. Class 37. In an arrangement for geophysical surveying, a rotary field is produced by rotating a magnet or by feeding A.C. in quadrature to coils mounted at right angles and is measured at a distance. As shown, measurements are effected with the aid of two receivers each comprising two pick-up coils at right angles and, for example, carried in birds towed by an aircraft carrying the transmitter. The measurements proposed are in each receiver: (1) the difference between the voltages picked up by the two coils; (2) the rate of change of such difference; (3) the phase difference between the voltages picked up by the two coils : in one receiver only (4) the rate of change of phase difference: in the receivers jointly (5) the difference between the voltage differences (6) the rate of change of the last mentioned quantity (7) the difference between the phase differences (8) the rate of change of the last mentioned quantity. The orientation of the receiver coils is such that in the absence of distortion of the field by geological formations quantity (1) is zero. In addition, the voltage picked up by one coil only is indicated and serves as a measure of the distance between transmitter and receiver. This is desirable where the transmitter and receiver are on separate aircraft. It is also suggested that these aircraft could carry the receiver and transmitter of a second surveying system operating on a different frequency.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE827842X | 1955-02-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB827842A true GB827842A (en) | 1960-02-10 |
Family
ID=20349403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3543/56A Expired GB827842A (en) | 1955-02-03 | 1956-02-03 | Improvements in or relating to apparatus for detecting and exploring electrically conductive bodies |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB827842A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2507786A1 (en) * | 1981-06-10 | 1982-12-17 | Inst Gornictwa Naftowego Gaz | METHOD AND DEVICE FOR DIRECTLY PROSPECTING HYDROCARBON PITCHES |
| WO2014047730A1 (en) * | 2012-09-28 | 2014-04-03 | Fugro Canada Corp. | Multiple receivers for airborne electromagnetic surveying |
| CN113504573A (en) * | 2021-07-06 | 2021-10-15 | 北京航空航天大学 | Well circumference resistivity measuring device based on focusing magnetic field |
-
1956
- 1956-02-03 GB GB3543/56A patent/GB827842A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2507786A1 (en) * | 1981-06-10 | 1982-12-17 | Inst Gornictwa Naftowego Gaz | METHOD AND DEVICE FOR DIRECTLY PROSPECTING HYDROCARBON PITCHES |
| US4641100A (en) * | 1981-06-10 | 1987-02-03 | Instytut Gornictwa Naftowego I Gazownictwa | Multifrequency method for direct airborne electromagnetic prospecting of hydrocarbon deposits |
| WO2014047730A1 (en) * | 2012-09-28 | 2014-04-03 | Fugro Canada Corp. | Multiple receivers for airborne electromagnetic surveying |
| US9933540B2 (en) | 2012-09-28 | 2018-04-03 | Cgg Data Services Ag | Multiple receivers for airborne electromagnetic surveying |
| CN113504573A (en) * | 2021-07-06 | 2021-10-15 | 北京航空航天大学 | Well circumference resistivity measuring device based on focusing magnetic field |
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