CN209446506U - Seepage from dykes channel Three-Dimensional Magnetic measuring resistance rate detection device - Google Patents
Seepage from dykes channel Three-Dimensional Magnetic measuring resistance rate detection device Download PDFInfo
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- CN209446506U CN209446506U CN201822094105.4U CN201822094105U CN209446506U CN 209446506 U CN209446506 U CN 209446506U CN 201822094105 U CN201822094105 U CN 201822094105U CN 209446506 U CN209446506 U CN 209446506U
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Abstract
Three-Dimensional Magnetic measuring resistance rate detection device in seepage from dykes channel designed by the utility model, its electric field cathode rod and electric field anode bar is separately positioned on the inside of levee body and on the outside of levee body, the positive pumping signal communication ends of pumping signal sending device connect electric field cathode rod, the cathode pumping signal communication ends of pumping signal sending device connect electric field anode bar, magnetic field measurement system is arranged in the top of levee body, magnetic field measurement system is moved along survey line group, and the full extent of space changing magnetic field data due to caused by the power supply electric field change of pumping signal sending device are received in each measuring point of survey line group, and the position location data of place measuring point, survey line group is located at the top of levee body and moves towards arrangement along dyke；Magnetic field measurement system carries out magnetic data for the magnetic field data of each measuring point based on the received and location data and handles to obtain each point position location information and the corresponding magnetic resistivity value of each measuring point.The utility model can accurately obtain leakage passage position.
Description
Technical field
The utility model relates to geophysical probing technique fields, in particular to a kind of seepage from dykes channel three-dimensional magnetic survey electricity
Resistance rate detection device.
Background technique
Dyke building quality and safety runs the relationship people across the Straits security of the lives and property, but since dike structure is complicated, repairs
Build of the remote past, the security risks such as generally existing leakage.To leakage passage detection be always dyke defect detecting emphasis and
Difficult point.Hidden leakage defect detection method can be divided into three classes at present: first is that the electrical property difference based on leakage passage and surrounding medium, that is, seep
The good electric conductivity of leak finds out leakage distribution situation using electrical prospecting, mainly have transient electromagnetic method, High Density Resistivity,
Flow field method etc..There are detection blind areas for transient electromagnetic method, it is difficult to effectively identification superficial layer hidden leakage defect.High Density Resistivity volume
Effect is obvious, and longitudinal resolution is not high.Flow field method can not determine channel and flow direction of the percolating water inside levee body.Second class method
It is to utilize the physics chemical action of percolating water, including tracer method, nuclear magnetic resonance method and acoustic-emission.Tracer method
It is suitable for the detailed of hidden danger by the movement and leakage states, this method of natural or artificial radioactivity tracer measurement subsurface flow
It looks into, but lacks quantitative interpretation.The interference that nuclear magnetic resonance method needs that river is overcome to detect percolating water.Acoustic-emission is according to dyke
When leaking, there are water flow sound and water and soil body grating, are positioned with sound emission to leakage passage, but this method can only also determine
Property description.Third class method is to monitor the dynamic changing process of seepage from dykes using detection is repeated several times, track seepage from dykes
Generation and development process, but embankment safety monitoring is long process, it is difficult to play the role of emergency repair.
In general, the method and technology for being currently used in seepage from dykes detection respectively has advantage and disadvantage, though certain achievement is obtained, it is right
There are still many deficiencies for the research work such as the accurate positionin in seepage from dykes channel and the quantitative interpretation of detection result.
Summary of the invention
The purpose of this utility model seeks to provide a kind of seepage from dykes channel Three-Dimensional Magnetic measuring resistance rate detection device, the dress
It sets by forming alternating electromagnetic field abnormal law caused by current loop as leakage passage in dyke surface measurement, confirmation is seeped
Channel position is leaked, while passing through detection different times leakage anomaly distributional pattern, dynamic tracing leakage passage evolutionary process.
In order to achieve this, a kind of seepage from dykes channel Three-Dimensional Magnetic measuring resistance rate detection dress designed by the utility model
It sets, which is characterized in that it includes electric field cathode rod, electric field anode bar, pumping signal sending device and magnetic field measurement system,
In, the electric field cathode rod and electric field anode bar are separately positioned on the inside of levee body and on the outside of levee body, pumping signal sending device
Positive pumping signal communication ends connect electric field cathode rod, and the cathode pumping signal communication ends of pumping signal sending device connect electric field
Magnetic field measurement system is arranged in the top of anode bar, levee body, and magnetic field measurement system is moved along survey line group, and in each survey of survey line group
Point receives full extent of space changing magnetic field data and institute due to caused by the power supply electric field change of pumping signal sending device
In the position location data of measuring point, the survey line group is located at the top of levee body and moves towards arrangement along dyke；Magnetic field measurement system is used
Magnetic data is carried out in the magnetic field data of each measuring point based on the received and location data to handle to obtain each point position
Location information and the corresponding magnetic resistivity value of each measuring point.
Compared to existing dam leakage detecting devices, the beneficial effects of the utility model are mainly manifested in:
1, seepage from dykes channel is current collection region, using the utility model, according to leakage anomaly and supply current shape
At current loop caused by anomalous field distribution, can quickly find out the three-dimensional spatial distribution situation in seepage from dykes channel, have
Have the advantages that detection efficient is high, investigation depth is big, no ground electrode.
2, using the utility model, the magnetic field of measurement is not influenced by low-resistance coating, and more adaptation background resistivity is relatively
Low dyke soil body environment.Different frequency electric field signal can be emitted, anomalous field value is corrected by static magnetic field, can effectively be avoided
Scene interference, the device strong antijamming capability, detection result are accurate and reliable.
3, using the utility model, when live host detection may be implemented, real-time display detection result, detection efficient height.
Therefore, the device of the utility model has the advantages that operability is high, practical, for country Seawall safety and
The people's lives and property provides safeguard safely.
Detailed description of the invention
Fig. 1 is the utility model Three-Dimensional Magnetic measuring resistance rate detection device schematic diagram top view；
Fig. 2 is the utility model Three-Dimensional Magnetic measuring resistance rate detection device schematic diagram front view；
Fig. 3 is the utility model magnetic field measurement system structural block diagram.
1-levee body, 2-levee bodys inside, 3-levee bodys outside, 4-electric field cathode rods, 5-electric field anode bars, 6-excitation letters
Number sending device, 7-magnetic field measurement systems, 7.1-data processors, 7.2-three-dimensional magnetometers, 7.3-GPS navigations positioning dress
It sets, doubtful leakage is logical in 7.4-calculators, 8-static magnetic field receivers, 9-service cables, 10-survey line groups, 11-dikes
Road.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
A kind of seepage from dykes channel Three-Dimensional Magnetic measuring resistance rate detection device of the utility model design, as shown in Figures 1 to 3,
It includes electric field cathode rod 4, electric field anode bar 5, pumping signal sending device 6 and magnetic field measurement system 7, wherein the electric field
Cathode rod 4 and electric field anode bar 5 are separately positioned on 3 on the outside of levee body inside 2 and levee body, and the anode of pumping signal sending device 6 swashs
Encourage signal communication end connection electric field cathode rod 4, the cathode pumping signal communication ends connection electric field anode of pumping signal sending device 6
Magnetic field measurement system 7 is arranged in the top of stick 5, levee body 1, and magnetic field measurement system 7 is moved along survey line group 10, and in the every of survey line group 10
A measuring point receives the full extent of space changing magnetic field number due to caused by the power supply electric field change of pumping signal sending device 6
According to and place measuring point position location data, the survey line group 10 be located at the top of levee body 1 and along dyke to be measured move towards arrangement；
Magnetic field measurement system 7 is carried out for the magnetic field data (three-dimensional magnetic field data) of each measuring point based on the received and location data
Magnetic data handles to obtain each point position location information and the corresponding magnetic resistivity value of each measuring point.
In above-mentioned technical proposal, the pumping signal sending device 6, electric field cathode rod 4, doubtful 11 and of leakage passage in dike
Electric field anode bar 5 is formed for electric field circuit.Doubtful leakage passage position current density in the electric field circuit inside levee body is aobvious
It writes and increases, magnetic field strength enhances therewith, significantly increases in levee crown along the magnetic field levels component that line direction measures, and presents apparent
Magnetic field spatial abnormal feature, so as to quick delineation abnormality distributing position.
In above-mentioned technical proposal, the magnetic field measurement system 7 is led including data processor 7.1, three-dimensional magnetometer 7.2, GPS
Positioning device 7.3 of navigating and calculator 7.4, the total space of the output end connection data processor 7.1 of the three-dimensional magnetometer 7.2
The magnetic field data input terminal of range, the number of position fixes of the output end connection calculator 7.4 of GPS navigation positioning device 7.3
According to input terminal, the imaging of the magnetic resistivity distribution of the data output end connection calculator 7.4 of data processor 7.1 shows that data are defeated
Enter end.
In above-mentioned technical proposal, it further includes static magnetic field receiver 8, and the top of levee body 1 is arranged in static magnetic field receiver 8
Portion, the static magnetic field data input pin of the signal output end connection data processor 7.1 of the static magnetic field receiver 8 are static
Magnetic field receiver 8 is for monitoring before background magnetic field at the appointed time goes into operation (in one day) in search coverage, work neutralizes when knocking off
Change procedure in time range, and the data for characterizing the change procedure of background magnetic field within a specified time are transferred to magnetic field and are surveyed
Amount system 7 is for magnetic field data received by magnetic field for correcting measuring system 7.The static magnetic field receiver 8 is placed in dyke
Top without electromagnetic interference at, for monitoring change procedure of the background magnetic field at one day in search coverage, magnetic field for correcting measurement system
Changes of magnetic field situation received by system 7, provides condition for further Inversion Calculation.
In above-mentioned technical proposal, the spacing range between the electric field cathode rod 4 and electric field anode bar 5 is 600~800
Rice, specific view detected object and task determine, to expand current supply circuit range as far as possible, reduce the interference of service cable as original
Then.
In above-mentioned technical proposal, the pumping signal sending device 6 is provided with direct current/alternating current to for electric field circuit,
Due to the good electric conductivity of leakage passage, Electrical distribution is uneven inside dyke, electric current can be made to concentrate in leakage passage, electric current is close
Degree increases.Therefore there is abnormal magnetic field strength in leakage passage surrounding space, the horizontal component for showing as magnetic field significantly increases.
In above-mentioned technical proposal, the survey line group 10 includes that more surveys line of parallel arrangement, every survey line are moved towards along dyke
Middle measuring point spacing is equal and measuring point spacing range is 0.5~1 meter (accuracy for guaranteeing leakage passage positioning).Survey line length for
The minimum principle of the interference of electrical cables 9.
In above-mentioned technical proposal, on the inside of levee body 2 leakage water outlet position, electric field anode bar 5 is arranged in electric field cathode rod 4
On the outside of levee body 3 bottom is set.Electric current is that cathode is flowed to by anode, and the leakage water outlet on the outside of levee body is unknown at the beginning
, negative pole end is placed on the known water outlet on the inside of levee body, it is ensured that being formed by current loop is by leakage passage shape
At.
A kind of seepage from dykes channel detection method using above-mentioned apparatus, it includes the following steps:
Step 1: pumping signal sending device 6 is provided with alternating current to for electric field circuit, and alternating current will be empty around
Between generate anomalous field；
Step 2: magnetic field measurement system 7 is moved along survey line group 10, and is received in each measuring point of survey line group 10 due to excitation
The position of full extent of space changing magnetic field data caused by the power supply electric field change of sender unit 6 and place measuring point
Location data；
Step 3: static magnetic field receiver 8 monitors change procedure of the background magnetic field in time of measuring in search coverage, and
The background magnetic field average value for characterizing change procedure of the background magnetic field in time of measuring is transferred to magnetic field measurement system 7 for school
The magnetic field data of each measuring point, specifically may be expressed as: received by positive flux field measuring system 7
In formula,Static magnetic field receiver surveys magnetic field before being gone into operation by seepage from dykes channel detection, when work neutralization is knocked off
Average value, R be on dyke surface vertical range of the static magnetic field receiver 8 apart from positive and negative electrode line, I be for electric field
Supply current in circuit, then the magnetic field value observed on each measuring point is just obtained into corrected magnetic multiplied by correction coefficient C
Field intensity value；
When underground is uniform dielectric, the normal magnetic field intensity along line direction be may be expressed as:
In formula, HnFor levee crown in uniform dielectric, along the arbitrary point that line direction is surveyed, normal magnetic field theoretical value, I are power supply electricity
Supply current in circuit, x are the azimuthal coordinates value of line direction, and y is positive the side of electrode bar and negative electrode stick line direction
Position coordinate value, coordinate origin are located at the midpoint of positive and negative electrode；
Occurring leakage passage inside dyke, leakage passage position forms good conductor, and dike structure becomes heterogeneous body, on
The normal distribution form for stating uniform magnetic field will be destroyed, and abnormal magnetic field strength is generated at leakage passage position, by
The situation of change of levee crown measurement magnetic field strength, so that it may determine the distributing position of leakage passage；
Step 4: according to the magnetic field value after the correction of each measuring point, calculating the corresponding underground magnetic of each measuring point using following formula
Resistivity value:
Wherein, MMR indicates the corresponding dyke inner magnet resistivity value of each measuring point, described in magnetic resistivity and electrical prospecting
Resistivity is different, and it is using percentage value table that it, which is the ratio for indicating the exceptional value of magnetic field strength relative to normal magnetic field theoretical value,
The parameter shown, in formula, HnFor normal magnetic field theoretical value in above-mentioned dyke uniform dielectric,For the magnetic field after the correction of each measuring point
Value, I are for the power supply current value in electric field circuit, and l is the half of electric field cathode rod 4 and 5 distance of electric field anode bar；
Step 5: according to the position location information of each measuring point and the corresponding underground magnetic resistivity value of each measuring point obtain to
Survey region magnetic resistivity Distribution value figure, and according to magnetic resistivity value exceptional value in magnetic resistivity Distribution value figure in region to be measured (with it is equal
The corresponding point position normal magnetic field theoretical value that levee crown is surveyed along line direction in even medium is different for exceptional value) corresponding position is fixed
Position information determines the position of leakage passage.And encryption observation is repeated in abnormal location, by changing frequency of supply, voltage, encryption
The methods of survey line further finds out the authenticity of exceptional value.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (8)
1. a kind of seepage from dykes channel Three-Dimensional Magnetic measuring resistance rate detection device, which is characterized in that it include electric field cathode rod (4),
Electric field anode bar (5), pumping signal sending device (6) and magnetic field measurement system (7), wherein the electric field cathode rod (4) and electricity
Field anode bar (5) is separately positioned on (2) and levee body outside (3) on the inside of levee body, the positive pole excitation letter of pumping signal sending device (6)
Signal communication end connects electric field cathode rod (4), the cathode pumping signal communication ends connection electric field anode of pumping signal sending device (6)
Magnetic field measurement system (7) are arranged in the top of stick (5), levee body (1), and magnetic field measurement system (7) is moved along survey line group (10), and is being surveyed
Each measuring point of line group (10) receives the full extent of space due to caused by the power supply electric field change of pumping signal sending device (6)
The position location data of changing magnetic field data and place measuring point, the survey line group (10) are located at the top of levee body (1) and along dikes
It is anti-to move towards arrangement；Magnetic field measurement system (7) is carried out for the magnetic field data of each measuring point based on the received and location data
Magnetic data handles to obtain each point position location information and the corresponding magnetic resistivity value of each measuring point.
2. Three-Dimensional Magnetic measuring resistance rate detection device in seepage from dykes channel according to claim 1, it is characterised in that: described to swash
Encourage sender unit (6), electric field cathode rod (4), doubtful leakage passage (11) and electric field anode bar (5) form power supply electricity in dike
Field circuit.
3. Three-Dimensional Magnetic measuring resistance rate detection device in seepage from dykes channel according to claim 1, it is characterised in that: the magnetic
Field measurement system (7) includes data processor (7.1), three-dimensional magnetometer (7.2), GPS navigation positioning device (7.3) and calculator
(7.4), the full extent of space changing magnetic field number of output end connection data processor (7.1) of the three-dimensional magnetometer (7.2)
According to input terminal, the position location data input terminal of output end connection calculator (7.4) of GPS navigation positioning device (7.3), data
The imaging of the magnetic resistivity distribution of data output end connection calculator (7.4) of processor (7.1) shows data input pin.
4. Three-Dimensional Magnetic measuring resistance rate detection device in seepage from dykes channel according to claim 3, it is characterised in that: it is also wrapped
It includes static magnetic field receiver (8), static magnetic field receiver (8) is arranged in the top of levee body (1), the static magnetic field receiver
(8) the static magnetic field data input pin of signal output end connection data processor (7.1), static magnetic field receiver (8) are used for
The change procedure of background magnetic field within a specified time in search coverage is monitored, and the change of background magnetic field within a specified time will be characterized
The data of change process are transferred to magnetic field measurement system (7) for magnetic field data received by magnetic field for correcting measuring system (7).
5. Three-Dimensional Magnetic measuring resistance rate detection device in seepage from dykes channel according to claim 1, it is characterised in that: the electricity
Spacing range between field cathode rod (4) and electric field anode bar (5) is 600~800 meters.
6. Three-Dimensional Magnetic measuring resistance rate detection device in seepage from dykes channel according to claim 2, it is characterised in that: described to swash
It encourages sender unit (6) and is provided with alternating current to for electric field circuit, alternating current will generate anomalous field in surrounding space.
7. Three-Dimensional Magnetic measuring resistance rate detection device in seepage from dykes channel according to claim 1, it is characterised in that: the survey
Line group (10) includes that more surveys line of parallel arrangement are moved towards along dyke, and measuring point spacing is equal in every survey line and measuring point spacing range
It is 0.5~1 meter.
8. Three-Dimensional Magnetic measuring resistance rate detection device in seepage from dykes channel according to claim 1, it is characterised in that: electric field is negative
The leakage water outlet position of (2) is arranged on the inside of levee body in pole stick (4), and the bottom of (3) is arranged on the outside of levee body in electric field anode bar (5)
Portion.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668938A (en) * | 2018-12-13 | 2019-04-23 | 长江水利委员会长江科学院 | Seepage from dykes channel Three-Dimensional Magnetic measuring resistance rate detection device and method |
| CN114114433A (en) * | 2021-12-08 | 2022-03-01 | 黄河勘测规划设计研究院有限公司 | Full-tensor gradient dam body leakage channel detection device and method |
-
2018
- 2018-12-13 CN CN201822094105.4U patent/CN209446506U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668938A (en) * | 2018-12-13 | 2019-04-23 | 长江水利委员会长江科学院 | Seepage from dykes channel Three-Dimensional Magnetic measuring resistance rate detection device and method |
| CN109668938B (en) * | 2018-12-13 | 2024-01-09 | 长江水利委员会长江科学院 | Device and method for detecting three-dimensional magnetic resistivity of embankment leakage channel |
| CN114114433A (en) * | 2021-12-08 | 2022-03-01 | 黄河勘测规划设计研究院有限公司 | Full-tensor gradient dam body leakage channel detection device and method |
| CN114114433B (en) * | 2021-12-08 | 2023-12-05 | 黄河勘测规划设计研究院有限公司 | Device and method for detecting leakage channel of dam body with full tensor gradient |
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