CN102435866A - Method for quickly identifying interference of ground object during archaeological detection of ground penetrating radar - Google Patents

Method for quickly identifying interference of ground object during archaeological detection of ground penetrating radar Download PDF

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CN102435866A
CN102435866A CN2011103701048A CN201110370104A CN102435866A CN 102435866 A CN102435866 A CN 102435866A CN 2011103701048 A CN2011103701048 A CN 2011103701048A CN 201110370104 A CN201110370104 A CN 201110370104A CN 102435866 A CN102435866 A CN 102435866A
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source
interference
ground
line
interference source
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田钢
林金鑫
王帮兵
石战结
赵文轲
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

The invention discloses a method for quickly identifying the interference of a ground object during archaeological detection of a ground penetrating radar. The problem of electromagnetic interference caused by the ground object cannot be well solved by the conventional archaeological detection operation of the ground penetrating radar. The method comprises the following steps of: firstly, establishing a space coordinate system for a detection area, and establishing a rectangular coordinate system by using a detection line where a transmitting antenna is positioned as an x axis, a starting point of the detection line as an original point, a ground line which is vertical to the detection line as a y axis and a downward line which is vertical to the ground as a z axis; secondly, acquiring position parameters of an interference source, and calculating an interference time distance curve; and finally, charting data which is obtained by the archaeological detection of a field ground penetrating radar, comparing a chart of the data with the chart of the interference time distance curve which is obtained by calculation, and identifying ground interference from an actually-detected section. The method is applicable to calculation and identification of the interference of the ground object, and has the advantages of quickness, simplicity, convenience, intuitive result and the like.

Description

The GPR archaeology is surveyed ground object and is disturbed method for quickly identifying
Technical field
The inventive method belongs to GPR archaeology exploration engineering field, relates in particular to the Electromagnetic Interference that the above object in a kind of ability quick identification ground produces.
Background technology
GPR becomes a kind of useful GEOPHYSICS FOR SHALLOW LAYER detection method in the science and technology archaeology with its high resolving power, advantage such as efficient, harmless.Because regular meeting adopted non-screened shielded antanna when the GPR archaeology was surveyed, the electromagnetic wave portion of energy of this kind antenna emission is aloft propagated.Electromagnetic wave attenuation is very little in the air.The Electromagnetic Interference of generations such as above object in ground such as iron block, electric wire, entanglement, buildings can be superimposed upon on the underground useful signal, and compares with useful signal, and interfering energy is strong, even might cover useful signal.Along with industrialization and quickening of urbanization process, the Electromagnetic Interference that the above object in ground produces is one of subject matter of facing of GPR archaeology investigation and prospecting.So need the technology of this interference of the easy quick identification of a kind of ability.
Summary of the invention
The purpose of this invention is to provide a kind of GPR and engage in archaeological studies when surveying, the method for the Electromagnetic Interference that the above interference source in ability quick identification ground produces.
Set up space coordinates to surveying the district; When coordinate system is set up with emitting antenna place survey line for
Figure 2011103701048100002DEST_PATH_IMAGE002
axle; The survey line starting point is an initial point; The vertical survey line in ground is
Figure 2011103701048100002DEST_PATH_IMAGE004
axle, vertical ground downwards for
Figure 2011103701048100002DEST_PATH_IMAGE006
axle set up rectangular coordinate system.
The practical implementation step of the inventive method:
Step (1). obtain the position of interference source parameter;
1-1. when interference source is the some Source Type; Point source interference source Q point coordinate is (
Figure 2011103701048100002DEST_PATH_IMAGE008
); Obtain point source interference source Q subpoint on survey line, and measure the position a of subpoint on survey line; Subpoint is to the distance b of survey line on the ground to measure point source interference source Q, and measurement point source interference source Q is to the vertical range c on ground;
1-2 When the interference source for the line source type, line source interference source used at any point on a line source
Figure 2011103701048100002DEST_PATH_IMAGE012
(
Figure 2011103701048100002DEST_PATH_IMAGE014
) and with a non-zero vector
Figure 2011103701048100002DEST_PATH_IMAGE016
parallel straight expression; online source of interference sources
Figure 362301DEST_PATH_IMAGE010
office to take some distance from two o'clock
Figure 217125DEST_PATH_IMAGE012
and
Figure 2011103701048100002DEST_PATH_IMAGE018
, then Refer to Step 1-1 point source interference source Q parameter acquisition obtained coordinates of two points
Figure 183812DEST_PATH_IMAGE012
(
Figure 579022DEST_PATH_IMAGE014
) and
Figure 331077DEST_PATH_IMAGE018
( ), a non-zero vector
Figure 841955DEST_PATH_IMAGE016
, the
Figure 2011103701048100002DEST_PATH_IMAGE022
（1）
The
Figure 2011103701048100002DEST_PATH_IMAGE024
,
Figure 2011103701048100002DEST_PATH_IMAGE026
,
Figure 2011103701048100002DEST_PATH_IMAGE028
as the unit direction vector;
1-3. when interference source is the face Source Type; The equation of face source interference source S is
Figure 2011103701048100002DEST_PATH_IMAGE030
, and is not 0 simultaneously; On the interference source S of face source, choose three the not point of conllinear
Figure 2011103701048100002DEST_PATH_IMAGE034
,
Figure 2011103701048100002DEST_PATH_IMAGE036
and
Figure 2011103701048100002DEST_PATH_IMAGE038
arbitrarily; Obtain coordinate
Figure 797404DEST_PATH_IMAGE034
(
Figure 2011103701048100002DEST_PATH_IMAGE040
),
Figure 183255DEST_PATH_IMAGE036
(
Figure 2011103701048100002DEST_PATH_IMAGE042
) and
Figure 789817DEST_PATH_IMAGE038
(
Figure 2011103701048100002DEST_PATH_IMAGE044
) then with reference to step 1-1 point source interference source Q parameter acquiring mode at 3, and obtain 4 parameters of face source interference source S through following system of equations:
Figure 2011103701048100002DEST_PATH_IMAGE046
（2）
According to the relevant mathematical theorem of plane equation; Can establish
Figure 2011103701048100002DEST_PATH_IMAGE052
in the above-mentioned system of equations,
Figure 2011103701048100002DEST_PATH_IMAGE054
for arbitrarily not being 0 constant.
Step (2). calculate and disturb T-X curve;
The GPR archaeology is surveyed and is adopted profile method to measure often, and the relative position of emitting antenna and receiving antenna remains unchanged, along the same moved further of survey line; The antenna distance of emitting antenna and receiving antenna is ; And the line of emitting antenna and receiving antenna is with axle clamp angle;
Figure 2011103701048100002DEST_PATH_IMAGE060
; If the emitting antenna coordinate is (
Figure 2011103701048100002DEST_PATH_IMAGE062
), the receiving antenna coordinate is (
Figure 2011103701048100002DEST_PATH_IMAGE064
).
2-1. if interference source is a Source Type,
（3）
Wherein
Figure 2011103701048100002DEST_PATH_IMAGE068
is the skyborne velocity of propagation of electromagnetic wave, the electromagnetic first break time of interference that produces for the point source interference source;
2-2. if interference source is the line source type,
Figure 2011103701048100002DEST_PATH_IMAGE072
（4）
Wherein: the electromagnetic first break time of interference that
Figure 2011103701048100002DEST_PATH_IMAGE074
produces for the line source interference source;
Figure 2011103701048100002DEST_PATH_IMAGE076
Figure 2011103701048100002DEST_PATH_IMAGE080
?
Figure 2011103701048100002DEST_PATH_IMAGE082
?
Figure 2011103701048100002DEST_PATH_IMAGE084
Figure 2011103701048100002DEST_PATH_IMAGE086
；
2-3. if interference source is the face Source Type,
When the both sides of emitting antenna and receiving antenna interference source or have one during in the face source in the face source;
Figure 2011103701048100002DEST_PATH_IMAGE088
When the homonymy of emitting antenna and receiving antenna interference source in the face source,
Figure 2011103701048100002DEST_PATH_IMAGE090
（5）
Wherein
Figure 2011103701048100002DEST_PATH_IMAGE092
is the electromagnetic first break time of interference that face source interference source produces;
Step (3). disturb on identification ground;
Open-air GPR archaeology detection gained data are carried out to figure disturb T-X curve to become figure to compare, and identify interference from measured section with the calculating gained.
The inventive method beneficial effect is following:
To calculating and the identification that ground object disturbs, have advantages such as quick, easy, visual result.Basically can when obtaining calculating parameter,, be easy to disturb identification at archaeology data acquisition scene with regard to the corresponding interference curve that calculates that can be fast and convenient.
Above-mentioned interferometer formula (3)～(5), in the time of can surveying for GPR archaeology, the compacting of the interference that the ground interference source produces provides the basis of usefulness.
Description of drawings
When Fig. 1 is image data, obtain the synoptic diagram of point source interference source parameter;
Fig. 2 is the situation of interference source in the instance 1;
Fig. 3 (a) is the section of archaeology GPR survey line gained among Fig. 2;
Fig. 3 (b) is according to formula (3) result calculated;
Fig. 4 is the situation of interference source in the instance 2;
Fig. 5 (a) is the section of archaeology GPR survey line gained among Fig. 4;
Fig. 5 (b) is according to formula (4) and formula (5) result calculated.
Embodiment
Below in conjunction with accompanying drawing the inventive method step is described further.
Set up space coordinates to surveying the district; When coordinate system is set up with emitting antenna place survey line for
Figure 58933DEST_PATH_IMAGE002
axle; The survey line starting point is an initial point; The vertical survey line in ground is
Figure 733628DEST_PATH_IMAGE004
axle, vertical ground downwards for
Figure 443964DEST_PATH_IMAGE006
axle set up rectangular coordinate system.
Step (1). obtain the position of interference source parameter.
1-1. when interference source is the some Source Type; Can as shown in Figure 1ly obtain point source interference source Q location parameter; Point source interference source Q point coordinate is (
Figure 873808DEST_PATH_IMAGE008
); Obtain point source interference source Q subpoint on survey line, and measure the position a of subpoint on survey line; Subpoint is to the distance b of survey line on the ground to measure point source interference source Q, and measurement point source interference source Q is to the vertical range c on ground;
1-2.? When the interference source is a line source type, you can get a line source as to the source of interference P positional parameters, line source interference source
Figure 115434DEST_PATH_IMAGE010
used at any point on a line source
Figure 328240DEST_PATH_IMAGE012
(
Figure 654267DEST_PATH_IMAGE014
) and with a non-zero vector
Figure 989434DEST_PATH_IMAGE016
parallel straight expression; Online source of interference sources
Figure 656039DEST_PATH_IMAGE010
office to take some distance from two points
Figure 734853DEST_PATH_IMAGE012
and
Figure 419781DEST_PATH_IMAGE018
, and then refer to step 1-1 point source interference source Q parameter to obtain the coordinates of points obtained
Figure 191428DEST_PATH_IMAGE012
( ) and
Figure 962255DEST_PATH_IMAGE018
(
Figure 3154DEST_PATH_IMAGE020
), a non-zero vector , the
Figure 321320DEST_PATH_IMAGE022
（1）
The
Figure 928888DEST_PATH_IMAGE024
,
Figure 401458DEST_PATH_IMAGE026
, as the unit direction vector;
1-3. when interference source is the face Source Type; Can obtain face source interference source S location parameter as getting off; The equation of face source interference source S is
Figure 66237DEST_PATH_IMAGE030
, and
Figure 290545DEST_PATH_IMAGE032
is not 0 simultaneously; On the interference source S of face source, choose three the not point of conllinear
Figure 289725DEST_PATH_IMAGE034
,
Figure 574075DEST_PATH_IMAGE036
and
Figure 173553DEST_PATH_IMAGE038
arbitrarily; Obtain coordinate
Figure 201552DEST_PATH_IMAGE034
(
Figure 320817DEST_PATH_IMAGE040
),
Figure 510490DEST_PATH_IMAGE036
(
Figure 36412DEST_PATH_IMAGE042
) and (
Figure 91141DEST_PATH_IMAGE044
) then with reference to step 1-1 point source interference source Q parameter acquiring mode at 3, and obtain 4 parameters of face source interference source S through following system of equations:
Figure 389399DEST_PATH_IMAGE046
Figure 776518DEST_PATH_IMAGE048
（2）
Figure 828875DEST_PATH_IMAGE050
According to the relevant mathematical theorem of plane equation; Can establish
Figure 719471DEST_PATH_IMAGE052
in the above-mentioned system of equations,
Figure 454209DEST_PATH_IMAGE054
for arbitrarily not being 0 constant.
Step (2). calculate and disturb T-X curve.
The GPR archaeology is surveyed and is adopted profile method to measure often, and the relative position of emitting antenna and receiving antenna remains unchanged, along the same moved further of survey line; The antenna distance of emitting antenna and receiving antenna is ; And the line of emitting antenna and receiving antenna is
Figure 434169DEST_PATH_IMAGE058
with
Figure 423488DEST_PATH_IMAGE002
axle clamp angle;
Figure 339808DEST_PATH_IMAGE060
; If the emitting antenna coordinate is (
Figure 435940DEST_PATH_IMAGE062
), the receiving antenna coordinate is (
Figure 835960DEST_PATH_IMAGE064
).
 
2-1. if interference source is a Source Type,
Figure DEST_PATH_IMAGE093
（3）
Wherein
Figure 638831DEST_PATH_IMAGE068
is the skyborne velocity of propagation of electromagnetic wave,
Figure DEST_PATH_IMAGE095
the electromagnetic first break time of interference that produces for the point source interference source;
2-2. if interference source is the line source type,
Figure 2011103701048100002DEST_PATH_IMAGE096
（4）
Wherein: the electromagnetic first break time of interference that
Figure 902322DEST_PATH_IMAGE074
produces for the line source interference source;
Figure 485750DEST_PATH_IMAGE076
Figure 423881DEST_PATH_IMAGE078
Figure 409155DEST_PATH_IMAGE080
?
Figure 656596DEST_PATH_IMAGE082
?
Figure 914271DEST_PATH_IMAGE084
；
2-3. if interference source is the face Source Type,
When the both sides of emitting antenna and receiving antenna interference source or have one during in the face source in the face source;
Figure 745141DEST_PATH_IMAGE088
When the homonymy of emitting antenna and receiving antenna interference source in the face source
Figure 2011103701048100002DEST_PATH_IMAGE098
（5）
Wherein
Figure 914216DEST_PATH_IMAGE092
is the electromagnetic first break time of interference that face source interference source produces;
Step (3). disturb on identification ground.
Open-air GPR archaeology is surveyed the gained data be carried out to figure, like Fig. 3 (a) and Fig. 5 (a).To calculate gained and disturb T-X curve to become figure, like Fig. 3 (b) and Fig. 5 (b).
Open-air GPR archaeology detection gained data are carried out to figure disturb T-X curve to become figure to compare, and identify ground from measured section and disturb with the calculating gained.
Embodiment 1:
As shown in Figure 2 is the instance that ground object disturbs quick identification when carrying out the detection of GPR archaeology in the Liang Zhu ruins.There are two wire posts on ground, survey line region, and its distance to survey line is respectively 30.5m and 36m, because the distance of their size much smaller than them to survey line, so can regard the point source interference source as.Can obtain the location parameter of two point source interference sources with reference to step 1-1; The parameter of interference source 1 is
Figure 2011103701048100002DEST_PATH_IMAGE100
; The parameter of interference source 2 is
Figure 2011103701048100002DEST_PATH_IMAGE102
; Two curves have been produced through calculating two point source interference sources; Like Fig. 3 (b); And two curve lineups are also arranged in the GPR archaeology measured section relevant position of Fig. 3 (a), should be the Electromagnetic Interference that these two wire columns produce.
Embodiment 2:
As shown in Figure 4 be another carry out in the Liang Zhu ruins GPR archaeology when surveying ground object disturb the instance of quick identification.The survey line region, on have an electric wire (the substantially parallel face of land) in vain, can regard the line source interference source as; Also have a building on the ground, can regard face source interference source as.Can obtain the location parameter
Figure 2011103701048100002DEST_PATH_IMAGE104
of line source interference source with reference to step 1-2; Can obtain the location parameter
Figure 2011103701048100002DEST_PATH_IMAGE106
of face source interference source with reference to step 1-3; Produced curve through calculating the line source interference source; Like Fig. 5 (b) is the oblique line that face source interference source produces; And also can find curve lineups and oblique line lineups in the GPR archaeology measured section relevant position of Fig. 5 (a); Wherein the curve lineups should be the Electromagnetic Interference from aerial electric wire, and the oblique line lineups are the Electromagnetic Interference of surface structures.

Claims (1)

1. the GPR archaeology is surveyed ground object and is disturbed method for quickly identifying, it is characterized in that following steps:
Step (1). obtain the position of interference source parameter;
1-1. when interference source is the some Source Type; Point source interference source Q point coordinate is (
Figure 2011103701048100001DEST_PATH_IMAGE001
); Obtain point source interference source Q subpoint on survey line, and measure the position a of subpoint on survey line; Subpoint is to the distance b of survey line on the ground to measure point source interference source Q, and measurement point source interference source Q is to the vertical range c on ground;
1-2 When the interference source for the line type, line source interference
Figure 129899DEST_PATH_IMAGE002
used at any point on a line source
Figure 2011103701048100001DEST_PATH_IMAGE003
(
Figure 470881DEST_PATH_IMAGE004
) and with a non-zero vector
Figure 2011103701048100001DEST_PATH_IMAGE005
line parallel expression; online source interference sources
Figure 729824DEST_PATH_IMAGE002
office to take some distance from two o'clock
Figure 671104DEST_PATH_IMAGE003
and
Figure 345799DEST_PATH_IMAGE006
, and then refer to step 1-1 point source interference source Q parameter acquisition obtained two point coordinate
Figure 557600DEST_PATH_IMAGE003
(
Figure 987444DEST_PATH_IMAGE004
) and
Figure 901174DEST_PATH_IMAGE006
(
Figure 2011103701048100001DEST_PATH_IMAGE007
), a non-zero vector , the
Figure 272298DEST_PATH_IMAGE008
（1）
The
Figure 2011103701048100001DEST_PATH_IMAGE009
,
Figure 545148DEST_PATH_IMAGE010
,
Figure 2011103701048100001DEST_PATH_IMAGE011
as the unit direction vector;
1-3. when interference source is the face Source Type; The equation of face source interference source S is
Figure 956625DEST_PATH_IMAGE012
, and
Figure 2011103701048100001DEST_PATH_IMAGE013
is not 0 simultaneously; On the interference source S of face source, choose three the not point of conllinear ,
Figure 2011103701048100001DEST_PATH_IMAGE015
and arbitrarily; Obtain coordinate
Figure 101802DEST_PATH_IMAGE014
(
Figure 2011103701048100001DEST_PATH_IMAGE017
),
Figure 6435DEST_PATH_IMAGE015
( ) and (
Figure 2011103701048100001DEST_PATH_IMAGE019
) then with reference to step 1-1 point source interference source Q parameter acquiring mode at 3, and obtain 4 parameters of face source interference source S through following system of equations:
Figure 308606DEST_PATH_IMAGE020
Figure 2011103701048100001DEST_PATH_IMAGE021
（2）
According to the relevant mathematical theorem of plane equation; Can establish
Figure 2011103701048100001DEST_PATH_IMAGE023
in the above-mentioned system of equations,
Figure 793257DEST_PATH_IMAGE024
for arbitrarily not being 0 constant;
Step (2). calculate and disturb T-X curve;
The GPR archaeology is surveyed and is adopted profile method to measure often, and the relative position of emitting antenna and receiving antenna remains unchanged, along the same moved further of survey line; The antenna distance of emitting antenna and receiving antenna is
Figure 2011103701048100001DEST_PATH_IMAGE025
; And the line of emitting antenna and receiving antenna is
Figure 2011103701048100001DEST_PATH_IMAGE027
with
Figure 203509DEST_PATH_IMAGE026
axle clamp angle;
Figure 176013DEST_PATH_IMAGE028
; If the emitting antenna coordinate is ( ), the receiving antenna coordinate is (
Figure 101244DEST_PATH_IMAGE030
);
2-1. if interference source is a Source Type,
Figure 2011103701048100001DEST_PATH_IMAGE031
（3）
Wherein
Figure 951651DEST_PATH_IMAGE032
is the skyborne velocity of propagation of electromagnetic wave,
Figure 2011103701048100001DEST_PATH_IMAGE033
the electromagnetic first break time of interference that produces for the point source interference source;
2-2. if interference source is the line source type,
Figure 465677DEST_PATH_IMAGE034
（4）
Wherein: the electromagnetic first break time of interference that produces for the line source interference source;
Figure 687711DEST_PATH_IMAGE036
Figure 907428DEST_PATH_IMAGE038
?
Figure 2011103701048100001DEST_PATH_IMAGE039
?
Figure 2011103701048100001DEST_PATH_IMAGE041
；
2-3. if interference source is the face Source Type,
When the both sides of emitting antenna and receiving antenna interference source or have one during in the face source in the face source;
Figure 602163DEST_PATH_IMAGE042
When the homonymy of emitting antenna and receiving antenna interference source in the face source,
Figure 2011103701048100001DEST_PATH_IMAGE043
（5）
Wherein
Figure 995098DEST_PATH_IMAGE044
is the electromagnetic first break time of interference that face source interference source produces;
Step (3). disturb on identification ground;
Open-air GPR archaeology detection gained data are carried out to figure disturb T-X curve to become figure to compare, and identify interference from measured section with the calculating gained.
CN2011103701048A 2011-11-21 2011-11-21 Method for quickly identifying interference of ground object during archaeological detection of ground penetrating radar Pending CN102435866A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103376443A (en) * 2013-07-09 2013-10-30 浙江大学 Ground penetrating radar terrestrial interference detecting and fast eliminating method
CN107356985A (en) * 2017-08-24 2017-11-17 浙江大学 The method that earthen ruins archaeological investigation is carried out using GPR wave impedance inversion
CN108646229A (en) * 2018-06-14 2018-10-12 北京师范大学 Underground column reflector inclination angle detection method

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Publication number Priority date Publication date Assignee Title
WO2002086542A2 (en) * 2001-04-20 2002-10-31 Witten Alan J A method and apparatus for identifying buried objects using ground penetrating radar
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103376443A (en) * 2013-07-09 2013-10-30 浙江大学 Ground penetrating radar terrestrial interference detecting and fast eliminating method
CN107356985A (en) * 2017-08-24 2017-11-17 浙江大学 The method that earthen ruins archaeological investigation is carried out using GPR wave impedance inversion
CN108646229A (en) * 2018-06-14 2018-10-12 北京师范大学 Underground column reflector inclination angle detection method

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Application publication date: 20120502