CN108776359A - The measurement bearing calibration of the small loop line transient electromagnetic system of transceiver - Google Patents
The measurement bearing calibration of the small loop line transient electromagnetic system of transceiver Download PDFInfo
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- CN108776359A CN108776359A CN201810770218.3A CN201810770218A CN108776359A CN 108776359 A CN108776359 A CN 108776359A CN 201810770218 A CN201810770218 A CN 201810770218A CN 108776359 A CN108776359 A CN 108776359A
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Abstract
The invention discloses a kind of measurement bearing calibrations of the small loop line transient electromagnetic system of transceiver, including choose reference point；Overhead horizontal observation is carried out in reference point using transceiving integrated antenna and obtains the first actual measurement transient electromagnetic signal；Vertical Observation is carried out in point to be observed using transceiving integrated antenna and obtains the second actual measurement transient electromagnetic signal；Calculate the transient electromagnetic signal after correction.The present invention by way of measuring twice, the small loop line transient electromagnetic systematic observation signal of transceiver is corrected, signal cable coupled noise, transmitting-receiving Mutual Inductance Coupling noise and instrument host noise are eliminated by surveying to correct, therefore the method for the present invention can be corrected the measurement result of the small loop line transient electromagnetic system of transceiver, to obtain the geoinduction signal for including ground resistivity information of more high s/n ratio.
Description
Technical field
Present invention relates particularly to a kind of measurement bearing calibrations of the small loop line transient electromagnetic system of transceiver.
Background technology
With the development and the improvement of people's living standards of economic technology, electromagnetic survey field has also obtained more and more
Pay attention to and develops.
The small loop line transient electromagnetic system of transceiver has flexible and convenient feature of constructing, in city, railway, highway subgrade
It is widely used in equal shallow layer explorations, but the small loop line transient electromagnetic system oscillation coupled noise enhancing of transceiver, it observes
Voltage signal is in addition to comprising geoinduction signal, further comprising inductively making an uproar between signal cable coupling, reception and transmitting
Sound and instrument host noise.Although the prior art is eliminated in terms of antenna structure changes and emission current corrects two or correction wink
Mutual inductance signal between becoming Electromagnetic Launching and receiving, partly solves the problems, such as the mutual inductance between dual-mode antenna, but it is not
Correct cable and instrument host noise.Signal cable coupled noise, host noise are still signal black box, at present still without specific
Bearing calibration.
Invention content
The purpose of the present invention is to provide it is a kind of can to the measurement result of the small loop line transient electromagnetic system of transceiver into
Row correction, to the transceiver small loop line wink of the geoinduction signal comprising ground resistivity information of acquisition more high s/n ratio
Become the measurement bearing calibration of electromagnetic system.
The measurement bearing calibration of the small loop line transient electromagnetic system of this transceiver provided by the invention, including walk as follows
Suddenly：
S1. reference point is chosen；
S2. the reference point chosen in step S1 using transceiving integrated antenna carries out overhead horizontal observation, to acquisition the
One actual measurement transient electromagnetic signal；
S3. Vertical Observation is carried out in point to be observed using transceiving integrated antenna, to obtain the second actual measurement transient electromagnetic
Signal；
S4. the second actual measurement transient electromagnetic obtained according to the first obtained actual measurement transient electromagnetic signals of step S2 and step S3
Signal calculates the transient electromagnetic signal after correction.
Selection reference point described in step S1 is specially chosen using following rule：
R1. reference point is in ground depletion region (have no occluder in R1 meters of ranges of ground distance reference point), distance reference point
Non-electromagnetic field source (such as aerial, ground, underground commercial power facility) in R1 meters of (spherical surface) ranges；
R2. laterally electric structure is uniform for the underground below reference point；
R3. in R2 meters of ranges of distance reference point, electromagnetism lossy medium not in addition to the earth (such as aerial, ground or
Metallic object, the magnetic substance of underground).
The value of the R1 is 200.
The value of the R2 is 10 times of the outer diameter of transceiving integrated antenna.
The reference point using transceiving integrated antenna in selection described in step S2 carries out overhead horizontal observation, specially will
Transceiving integrated antenna is positioned over the surface of reference point in vertical direction, and transceiving integrated antenna is not less than with surface distance
N times of antenna outer diameter；It is horizontal direction that the vertical direction, which is defined as antenna axis direction,.
The value of the N is 2.
The transceiving integrated antenna of use described in step S3 carries out Vertical Observation in point to be observed, specially according to following rule
Then carry out Vertical Observation：
If A. point to be observed is on ground, transceiving integrated antenna is positioned over ground right over point to be observed in the horizontal direction
Table is observed；The horizontal direction is defined as antenna axis straight down；
If B. point to be observed is in tunnel, transceiving integrated antenna is subjected to Vertical Observation, and antenna axis in tunnel
The vertical the earth region to be measured of line.
The transient electromagnetic signal after calculating correction described in step S4, specially calculates the wink after correction using following formula
Become electromagnetic signal：
εCorrection=εVertically-εIt is horizontal
ε in formulaCorrectionFor the transient electromagnetic signal after correction, εVerticallyFor the second actual measurement transient electromagnetic signal；εIt is horizontalFor the first actual measurement
Transient electromagnetic signal.
The measurement bearing calibration of the small loop line transient electromagnetic system of this transceiver provided by the invention, by measuring twice
Mode, the small loop line transient electromagnetic systematic observation signal of transceiver is corrected, that is, pass through survey correction eliminate signal wire
Cable coupled noise, transmitting-receiving Mutual Inductance Coupling noise and instrument host noise, therefore the method for the present invention can be to the small loop line of transceiver
The measurement result of transient electromagnetic system is corrected, to obtain the earth sense for including ground resistivity information of more high s/n ratio
Induction signal.
Description of the drawings
Fig. 1 is the method flow diagram of the method for the present invention.
Fig. 2 is the schematic diagram that the overhead horizontal of the method for the present invention is observed.
Fig. 3 is the signal component schematic diagram that the overhead horizontal of the method for the present invention is observed.
Fig. 4 is the schematic diagram of the ground Vertical Observation of the method for the present invention.
Fig. 5 is the signal component schematic diagram of the ground Vertical Observation of the method for the present invention.
Fig. 6 is the signal correction result schematic diagram of the method for the present invention.
Specific implementation mode
It is the method flow diagram of the method for the present invention as shown in Figure 1：The small loop line transition of this transceiver provided by the invention
The measurement bearing calibration of electromagnetic system, includes the following steps：
S1. reference point is chosen；The selection principle of reference point is as follows：
R1. reference point have no occluder in ground depletion region, R1 meters of (such as 200m) ranges of ground distance reference point, away from
Non-electromagnetic field source (such as aerial, ground, underground commercial power facility) in R1 meters from reference point (spherical surface) ranges；
R2. laterally electric structure is uniform for the underground below reference point；
R3. in R2 meters of distance reference point (for 10 times of dual-mode antenna outer diameter) range, the electromagnetism consumption not in addition to the earth
Dispersion media (such as aerial, ground or underground metallic object, magnetic substance).
S2. the reference point chosen in step S1 using transceiving integrated antenna carries out overhead horizontal observation, to acquisition the
One actual measurement transient electromagnetic signal；Transceiving integrated antenna is specially positioned over to the surface of reference point in vertical direction, and is received
It sends out N times (2 times can be chosen for) that integral antenna is not less than antenna outer diameter with surface distance；The vertical direction is defined as
Antenna axis direction is horizontal direction；
Overhead horizontal is observed obtaining εIt is horizontal, then decomposed to obtain：
εIt is horizontal=εGreatly (level)+εTransmitting-receiving+εCable+εHost+εEnvironment (level)
ε in formulaTransmitting-receivingTo receive and dispatch mutual inductance signal, εCableFor signal cable noise, εHostFor instrument host noise, and εGreatly (level)With
εEnvironment (level)For useful signal；
S3. Vertical Observation is carried out in point to be observed using transceiving integrated antenna, to obtain the second actual measurement transient electromagnetic
Signal；Vertical Observation is specially carried out according to following rule：
If A. point to be observed is on ground, transceiving integrated antenna is positioned over ground right over point to be observed in the horizontal direction
Table is observed；The horizontal direction is defined as antenna axis straight down；
If B. point to be observed is in tunnel, transceiving integrated antenna is subjected to Vertical Observation, and antenna axis in tunnel
Vertically (such as tunnel axis vertical face when visiting in advance, axis is perpendicular when surveying deeper underground in tunnel for the earth region to be measured for line
It is straight downward, axis vertical tunnel both sides when surveying tunnel both sides)；
Vertical Observation obtains εVertically, then decomposed to obtain：
εVertically=εGreatly (vertical)+εTransmitting-receiving+εCable+εHost+εEnvironment (vertical)
ε in formulaTransmitting-receivingTo receive and dispatch mutual inductance signal, εCableFor signal cable noise, εHostFor instrument host noise, and εGreatly (vertical)With
εEnvironment (vertical)For useful signal；
S4. the second actual measurement transient electromagnetic obtained according to the first obtained actual measurement transient electromagnetic signals of step S2 and step S3
Signal calculates the transient electromagnetic signal after correction；The transient electromagnetic signal after correction is specially calculated using following formula：
εCorrection=εVertically-εIt is horizontal=[εGreatly (vertical)-εGreatly (level)]+[εEnvironment (vertical)-εEnvironment (level)]
ε in formulaCorrectionFor the transient electromagnetic signal after correction, εVerticallyFor the second actual measurement transient electromagnetic signal；εIt is horizontalFor the first actual measurement
Transient electromagnetic signal；
Meanwhile if when laterally electric structure is uniform for underground below measuring point, for receiving and dispatching coplanar coaxial system, and it is equivalent
Anti- magnetic flux receive-transmit system, there is εGreatly (level)=0, so obtaining：
εCorrection=εVertically-εIt is horizontal=εGreatly (vertical)+[εEnvironment (vertical)-εEnvironment (level)]
Meanwhile if can ignore when noise level is smaller, approximation obtains pure geoinduction signal vertical component, i.e.,
εCorrection=εVertically-εIt is horizontal≈εGreatly (vertical)。
Hereinafter, by taking equivalent anti-magnetic flux transient electromagnetic system as an example, the method for the present invention is further described：
First, reference point is chosen；
Secondly, reference point overhead horizontal observes (as shown in Figure 2)：Transceiving integrated antenna is uprightly being positioned over reference point just
Top (antenna axis is horizontal), antenna outer diameter 1m obtains the first actual measurement transient electromagnetic signal epsilon with surface distance 2mIt is horizontal, then right
εIt is horizontalIt is decomposed (as shown in Figure 3)；
Then, to be observed ground Vertical Observation (as shown in Figure 4)：Transceiving integrated antenna is horizontally arranged (antenna axis
Vertically) the earth's surface right over point to be observed, obtains the second actual measurement transient electromagnetic signal epsilonVertically, then to εVerticallyDecomposed (such as Fig. 5
It is shown)；
Finally, correction signal (as shown in Figure 6) is obtained.
Claims (8)
1. a kind of measurement bearing calibration of the small loop line transient electromagnetic system of transceiver, includes the following steps：
S1. reference point is chosen；
S2. the reference point chosen in step S1 using transceiving integrated antenna carries out overhead horizontal observation, real to obtain first
Survey transient electromagnetic signal；
S3. Vertical Observation is carried out in point to be observed using transceiving integrated antenna, to obtain the second actual measurement transient electromagnetic signal；
S4. the second actual measurement transient electromagnetic letter obtained according to the first obtained actual measurement transient electromagnetic signals of step S2 and step S3
Number, calculate the transient electromagnetic signal after correction.
2. the measurement bearing calibration of the small loop line transient electromagnetic system of transceiver according to claim 1, it is characterised in that
Selection reference point described in step S1 is specially chosen using following rule：
R1. reference point non-electromagnetic field source in ground depletion region, R1 meters of ranges of distance reference point；
R2. laterally electric structure is uniform for the underground below reference point；
R3. in R2 meters of ranges of distance reference point, the electromagnetism lossy medium not in addition to the earth.
3. the measurement bearing calibration of the small loop line transient electromagnetic system of transceiver according to claim 2, it is characterised in that
The value of the R1 is 200.
4. the measurement bearing calibration of the small loop line transient electromagnetic system of transceiver according to claim 3, it is characterised in that
The value of the R2 is 10 times of the outer diameter of transceiving integrated antenna.
5. the measurement bearing calibration of the small loop line transient electromagnetic system of transceiver according to one of Claims 1 to 4, special
Sign is to carry out overhead horizontal observation in the reference point of selection using transceiving integrated antenna described in step S2, will specially receive
Hair integral antenna is positioned over the surface of reference point in vertical direction, and transceiving integrated antenna is not less than day with surface distance
N times of line outer diameter；It is horizontal direction that the vertical direction, which is defined as antenna axis direction,.
6. the measurement bearing calibration of the small loop line transient electromagnetic system of transceiver according to claim 5, it is characterised in that
The value of the N is 2.
7. the measurement bearing calibration of the small loop line transient electromagnetic system of transceiver according to one of Claims 1 to 4, special
Sign is that the transceiving integrated antenna of use described in step S3 carries out ground Vertical Observation in point to be observed, specially according to as follows
Rule carries out Vertical Observation：
If A. point to be observed is on ground, by transceiving integrated antenna be positioned in the horizontal direction right over point to be observed earth's surface into
Row observation；The horizontal direction is defined as antenna axis straight down；
If B. point to be observed is in tunnel, transceiving integrated antenna is subjected to Vertical Observation in tunnel, and antenna axis hangs down
It waits until and surveys the earth region.
8. the measurement bearing calibration of the small loop line transient electromagnetic system of transceiver according to one of Claims 1 to 4, special
Sign is the transient electromagnetic signal after the calculating correction described in step S4, and the transition after correction is specially calculated using following formula
Electromagnetic signal：
εCorrection=εVertically-εIt is horizontal
ε in formulaCorrectionFor the transient electromagnetic signal after correction, εVerticallyFor the second actual measurement transient electromagnetic signal；εIt is horizontalFor the first actual measurement transition
Electromagnetic signal.
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| CN101382070A (en) * | 2007-09-03 | 2009-03-11 | 中国石油天然气集团公司 | Electromagnetical method for dynamically monitoring oil reservoir injection-production |
| CN103837899A (en) * | 2014-03-14 | 2014-06-04 | 长沙五维地科勘察技术有限责任公司 | Transient electromagnetic measurement device and method |
| CN103955003A (en) * | 2014-05-09 | 2014-07-30 | 中国科学院上海微系统与信息技术研究所 | Noise suppression method for superconducting transient electromagnetic application |
| CN105549097A (en) * | 2015-12-22 | 2016-05-04 | 吉林大学 | Transient electromagnetic signal power frequency and harmonic interference elimination method and apparatus thereof |
| CN108008451A (en) * | 2018-01-30 | 2018-05-08 | 安徽惠洲地质安全研究院股份有限公司 | A kind of transient electromagnetic detection device and the method for eliminating inductive interferences |
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2018
- 2018-07-13 CN CN201810770218.3A patent/CN108776359A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382070A (en) * | 2007-09-03 | 2009-03-11 | 中国石油天然气集团公司 | Electromagnetical method for dynamically monitoring oil reservoir injection-production |
| CN101281255A (en) * | 2008-06-04 | 2008-10-08 | 河北煤炭科学研究所 | Method for detecting down-hole instant changeable electromagnetic ultralong distance |
| CN103837899A (en) * | 2014-03-14 | 2014-06-04 | 长沙五维地科勘察技术有限责任公司 | Transient electromagnetic measurement device and method |
| CN103955003A (en) * | 2014-05-09 | 2014-07-30 | 中国科学院上海微系统与信息技术研究所 | Noise suppression method for superconducting transient electromagnetic application |
| CN105549097A (en) * | 2015-12-22 | 2016-05-04 | 吉林大学 | Transient electromagnetic signal power frequency and harmonic interference elimination method and apparatus thereof |
| CN108008451A (en) * | 2018-01-30 | 2018-05-08 | 安徽惠洲地质安全研究院股份有限公司 | A kind of transient electromagnetic detection device and the method for eliminating inductive interferences |
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Application publication date: 20181109 |