CN114137621A - Method, system and medium for detecting hidden danger of dragging type dam - Google Patents
Method, system and medium for detecting hidden danger of dragging type dam Download PDFInfo
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- CN114137621A CN114137621A CN202111242120.9A CN202111242120A CN114137621A CN 114137621 A CN114137621 A CN 114137621A CN 202111242120 A CN202111242120 A CN 202111242120A CN 114137621 A CN114137621 A CN 114137621A
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
Abstract
The embodiment of the invention discloses a method, a system and a medium for detecting hidden dangers of a dragging type dam; the system comprises: the device comprises a signal receiving device, signal processing equipment, a transmitting signal front-end device and a transmitting antenna array; the signal receiving device is arranged on a dam to be detected, and the signal processing equipment and the signal front-end device are arranged on a measuring ship staying in a water area where the dam to be detected is located; the transmitting antenna array floats on the water surface of the water area; the signal receiving device is connected with the signal processing equipment through a cable; the transmitting antenna array is connected with the transmitting signal front-end device through a cable, and the transmitting antenna array moves in a dragging mode along with the movement of the measuring ship.
Description
Technical Field
The embodiment of the invention relates to the technical field of geophysical detection of hydraulic engineering, in particular to a method, a system and a medium for detecting hidden dangers of a dragging type dam.
Background
With the rapid development of major foundation engineering construction such as national hydraulic and hydroelectric engineering and the like, the number of reservoir dams in China is in the leading position of the world, but as the construction period is long, and raw materials, tools and process levels adopted in the construction era are limited, a plurality of dam reservoirs have serious hidden dangers such as cracks, loose soil bodies, weak interlayers, ant holes and the like, so that the reservoir is formed into a sick dam reservoir; and most of the current dangerous dam reservoirs are located in mountainous and rural areas of China, are aggravated by factors such as management and monitoring conditions, natural environment and the like, and are easy to burst major dangerous situations such as piping, landslide and even bank break. Therefore, timely detection of hidden dam hazards becomes a key task in flood control projects.
At present, the conventional detection scheme of hidden dam danger is mostly carried out on land, and the main common schemes comprise a high-density resistivity method, a geological radar measurement method and a transient electromagnetic method. The application range of the high-density resistivity method is greatly restricted by longitudinal resolution, the method is more suitable for hidden dangers of dams with shallow burial depth and large hole diameter, and the problems of high detection cost, incomplete detection result and damage to the dam body to a certain extent exist; the geological radar measuring device is bulky, heavy and inconvenient to operate, and as the frequency of electromagnetic waves emitted by the radar is higher, the electromagnetic waves are more attenuated in an underground medium, so that the problems of smaller detection distance and lower resolution are caused, and in addition, the interference of other objects such as ground metal bodies, electric wires and the like exists, the measurement result of the geological radar has the defects of multi-solution and uncertainty of the direction of a target body, and the processing of image data obtained by measurement and geological interpretation need to be further improved; in recent years, the transient electromagnetic method is widely applied to detection of hidden dangers of dams, but due to the fact that hidden dangers in dams are small in structure, a certain contradiction exists between the conventional transient electromagnetic method and the exploration depth and the resolution ratio, and the detection requirement is difficult to meet.
Disclosure of Invention
In view of this, the embodiments of the present invention are intended to provide a method, a system and a medium for detecting hidden dangers of a towed dam; the working process can be simplified, the construction difficulty is reduced, and the detection efficiency is improved; and by changing the array parameters of the underwater transmitting antenna, the strength of a transmitting field source can be increased, the exploration depth and the exploration precision are improved, and the rapid and lossless fine detection of the hidden danger of the dam is realized.
The technical scheme of the embodiment of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a system for detecting hidden dangers of a towed dam, where the system includes: the device comprises a signal receiving device, signal processing equipment, a transmitting signal front-end device and a transmitting antenna array; the signal receiving device is arranged on a dam to be detected, and the signal processing equipment and the signal front-end device are arranged on a measuring ship staying in a water area where the dam to be detected is located; the transmitting antenna array floats on the water surface of the water area; wherein the content of the first and second substances,
the signal receiving device is connected with the signal processing equipment through a cable; the transmitting antenna array is connected with the transmitting signal front-end device through a cable, and the transmitting antenna array moves in a dragging mode along with the movement of the measuring ship.
In a second aspect, an embodiment of the present invention provides a towed dam potential hazard detection method, where the method is applied to the towed dam potential hazard detection system in the first aspect, and the method includes:
after the transmitting signal front-end device and the transmitting antenna array are powered on, based on measurement requirements, transmitting parameters of transmitting signals are set through the transmitting signal front-end device, and the transmitting signals which accord with the set transmitting parameters are transmitted to the transmitting antenna array to generate an alternating electric field to radiate outwards;
the signal receiving device collects radiation echoes based on synchronous control signals generated by the transmitting signals and transmits the radiation echoes to the signal processing equipment;
and performing signal processing based on the radiation echo through signal processing equipment, and forming image data for representing the hidden danger of the dam to be detected.
In a third aspect, an embodiment of the present invention provides a computer storage medium, where a towed-type dam potential hazard detection program is stored, and when being executed by at least one processor, the computer storage medium implements the steps of the towed-type dam potential hazard detection method according to the second aspect.
The embodiment of the invention provides a method, a system and a medium for detecting hidden dangers of a dragging type dam; the transmitting antenna array used for radiating signals outwards is arranged on the water surface and can move in a dragging mode along with the movement of the measuring ship, so that the transmitting signals can be flexibly arranged, the dam body cannot be affected or damaged in the detection process, and the dam can be rapidly and nondestructively and finely detected.
Drawings
Fig. 1 is a schematic diagram illustrating a towed dam hidden danger detection system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a front-end device for transmitting signals according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the floating frame assembly provided by an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a frame suspension bar according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an internal bracket suspension rod according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an antenna mast structure according to an embodiment of the present invention;
fig. 7 is a schematic flow chart of a method for detecting hidden dangers of a towed dam according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a dual piping channel model according to an embodiment of the present invention;
FIG. 9 is a diagram showing simulation results of a conventional scheme;
fig. 10 is a schematic diagram of a simulation result obtained by using the technical solution of the embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, a scenario that can be applied to the technical solution of the embodiment of the present invention is illustrated, in the embodiment of the present invention, a measuring ship stays on a water surface of a water area where a dam to be detected (as shown by cross line filling in fig. 1) is located, and in order to realize rapid and lossless fine detection of hidden dangers of the dam to be detected, as shown in fig. 1, the embodiment of the present invention provides a towed dam hidden danger detection system 1 applied to the scenario illustrated in fig. 1, where the system 1 includes: a signal receiving device 11, a signal processing device 12, a transmitting signal front-end device 13 and a transmitting antenna array 14; the signal receiving device 11 is arranged on a dam to be tested, and the signal processing equipment 12 and the transmitting signal front-end device 13 are arranged on a measuring ship staying in a water area where the dam to be tested is located; the transmit antenna array 14 floats on the surface of the body of water; wherein the content of the first and second substances,
the signal receiving device 11 is connected with the signal processing equipment 12 through a cable 15; the transmitting antenna array 14 is connected with the transmitting signal front-end device 13 through a cable 15, and the transmitting antenna array moves in a dragging mode along with the movement of the measuring ship.
With respect to the system 1 shown in fig. 1, it should be noted that, because the transmitting antenna array 14 for radiating signals outwards is placed on the water surface and can move in a towing manner along with the movement of the measuring vessel, the transmitting signals can be flexibly arranged, and the dam body itself is not affected or damaged in the detection process, so that the dam can be finely detected quickly and nondestructively.
For the system 1 shown in fig. 1, in some possible implementations, the transmit signal front-end apparatus 13 is configured to provide an excitation signal radiated outwards for the transmit antenna array 14, and specifically, referring to fig. 2, the transmit signal front-end apparatus 13 includes: a waveform generator 131, a current amplifier 132, and a synchronous detection module 133; wherein the content of the first and second substances,
the waveform generator 131 configured to generate a raw excitation signal of a duty ratio that satisfies a measurement requirement;
the current amplifier 132 is configured to amplify the original excitation signal according to the measurement requirement for the transmitting antenna array 14 to radiate outwards;
the synchronization detection module 133 is configured to detect the original excitation signal and generate a synchronization control signal for receiving synchronization.
For the above implementation, the waveform generator 131 can generate different forms of excitation signals, such as square wave signals, according to the measurement requirements, and can adjust the duty ratio of the excitation signals; the original excitation signal generated by the waveform generator 131 is rectified and amplified by the current amplifier 132 to generate a strong current signal, so that the transmitting antenna array 14 can meet the detection requirement of a long-distance and small target body when radiating outwards; furthermore, the synchronization detection module 133 is configured to detect the original excitation signal generated by the waveform generator, so as to generate a synchronization control signal for controlling the signal receiving device 11 on the receiving channel.
For the system 1 shown in fig. 1, in some possible implementations, referring to fig. 3, the transmit antenna array 14 is placed on a floating support 2 floating on the surface of the body of water; the floating support 2 comprises an extensible and lengthened frame suspension rod 21, an inner support suspension rod 22 and an air bag 23 which can enable the floating support 2 to be suspended on the water surface; wherein the content of the first and second substances,
the rim suspension rods 21 form a frame body of the floating frame 2, and the inner frame suspension rods 22 are arranged in the frame body; the air bag 23 is bound to the frame suspension rod 21; the frame suspension rod 21 and the inner support suspension rod 22 are hollow, and power lines for providing power for the transmitting antenna array 14 are distributed in the cavity; with continued reference to fig. 4, a set number of waterproof joints 27 are vertically disposed on the frame suspension rod 21 at regular intervals and in a staggered manner, wherein the waterproof joints 27-a along the horizontal direction (as shown by the dotted line) are used for assembling and installing the inner support suspension rod 22, and each waterproof joint 27-b along the vertical direction is connected to an antenna column 141 constituting the transmitting antenna array 14.
For the above implementation manner, in detail, in this embodiment, the frame suspension rod 21 and the inner support suspension rod 22 may be supported by a non-conductive lightweight pvc material, and are hollow inside, so as to form a cavity for routing a power line, and the power line may implement an electrical connection between the antenna column 141 in the transmitting antenna array 14 and the transmitting signal front-end device 13 through the waterproof joint 27. In addition, the air bag 23 can be made of polystyrene foaming material, and the air bag 23 is inflated to be convenient for suspension during measurement; after the measurement is finished, the air in the air bag 23 can be discharged, so that the device is convenient to store and store. In addition, in practice, the air bag 23 may be bound to the rim suspension rod 21 by a ring 26.
For the above implementation, in connection with fig. 3, the floating frame 2 further comprises a straight connector 24 and a quarter-turn connector 25; wherein, the straight line connector 24 can connect a plurality of straight bars to extend the lengths of the frame suspension bar 21 and the inner frame suspension bar 22; the quarter-turn connectors 25 are capable of forming a closed connection of the vertical frame suspension rods 21 to form a suspension frame of the floating frame 2. In the specific implementation process, the frame suspension rod 21 can be continuously extended and lengthened through the linear connector 24 as required to meet the actual measurement requirement.
For the above implementation, referring to fig. 5, the inner bracket suspension rod 22 is uniformly provided with waterproof joints 27 along the vertical direction for connecting the antenna posts 141 constituting the transmitting antenna array 14 to form an encrypted transmitting array.
For the above technical solution, in some possible implementations, the transmitting antenna array 141 includes antenna pillars 141 arranged according to a set regular shape, referring to fig. 6, each of the antenna pillars 141 may include two copper bars 61 installed inside the antenna pillar 141 in parallel, a sliding sheet 62 vertically contacting with the copper bars 61, a sliding groove 63 disposed outside the antenna pillar 141, and a clamping groove 64 disposed at a side of the sliding groove 63; wherein the content of the first and second substances,
the slider 62 can move in the sliding groove 63 in the vertical direction, and the slider 62 can be snapped into the slot 64 to fix the length of the copper bar as an effective line source in the antenna column 141.
For the above implementation, it should be noted that, the effective length of the line source of the antenna column 141 can be changed along with moving the sliding piece 62, and when the size of the detection target is large and is close to the transmitting antenna array 14, the detection purpose is achieved by using a shorter line source; when the detection target body is far away from the transmitting antenna array 14, a long line source can be adopted, and the purpose of long-distance and high-resolution exploration is achieved.
Based on the above implementation, in some examples, during the towed movement of the transmitting antenna array 14, the coherence of the electromagnetic waves radiated by the antenna column 141 is utilized to maximize the energy concentration on the dam body to be detected.
For the above example, it should be noted that, according to the technical solution of the embodiment of the present invention, the suspension rods can be combined at will according to the measurement requirement, so as to form the transmitting antenna array 14 in a regular arrangement, when the antenna columns 141 of the transmitting antenna array 14 transmit simultaneously, the coherent characteristic of the electromagnetic wave is utilized, so that the energy is concentrated on the dam body itself to the maximum extent, and the depth of detection and the measurement accuracy are effectively improved through the array measurement.
Based on the same inventive concept of the foregoing technical solution, referring to fig. 7, a method for detecting hidden danger of a towed dam according to an embodiment of the present invention is shown, where the method can be applied to the towed dam hidden danger detection system 1 in the foregoing technical solution, and before the method is executed, based on the towed dam hidden danger detection system 1, a frame suspension rod 21 and an inner frame suspension rod 2 may be connected according to measurement requirements to form a frame net of a floating frame 2; then, the antenna column 141 is connected as required, and the sliding sheet 62 is pushed to move in the sliding groove 63, so that the effective length of the line source of the antenna column 141 is adjusted, and the transmitting antenna array 141 is formed; then, the air cells 23 are inflated, and the floating scaffold 2 is put into the water. After the preparation work is completed, the method shown in fig. 7 is executed, which may include:
s701: after the transmitting signal front-end device and the transmitting antenna array are powered on, based on measurement requirements, transmitting parameters of transmitting signals are set through the transmitting signal front-end device, and the transmitting signals which accord with the set transmitting parameters are transmitted to the transmitting antenna array to generate an alternating electric field to radiate outwards;
s702: the signal receiving device collects radiation echoes based on synchronous control signals generated by the transmitting signals and transmits the radiation echoes to the signal processing equipment;
s703: and performing signal processing based on the radiation echo through signal processing equipment, and forming image data for representing the hidden danger of the dam to be detected.
For the above technical solution, specifically, the transmission parameters may include, but are not limited to, parameters such as a transmission signal waveform, a duty cycle, and a current intensity; after the transmitting signal front-end device 13 generates the transmitting signal, the transmitting signal is sent to the floating support 2 through the cable 15, and a detection alternating electric field is generated near the antenna column 141 through a loop connected by the frame suspension rod 21, the support suspension rod 22 and the antenna column 141 of the floating support 2. Then, the signal receiving apparatus transmits the acquired echo signal to the signal processing device 12 through the cable 15 under the control of the synchronization control signal, thereby performing signal processing and generating image data.
Based on the foregoing technical solutions, the embodiment of the present invention explains the technical effects of the technical solutions of the embodiments of the present invention through simulation examples, and takes the dual piping channel model shown in fig. 8 as an example, and the dual piping channel port in fig. 8 is shown as framed in an oval circle in fig. 8. In the conventional scheme, under the condition that a transmitting signal source formed by a transmitting signal front-end device 13 and a transmitting antenna array 14 is arranged at the center of the top surface of the dam to be tested, a numerical simulation mode is used for simulation, and a visual resistivity imaging method is used for explaining data, so that a simulation result for a double-piping channel is obtained as shown in fig. 9; by adopting the technical scheme adopted by the embodiment of the invention, the simulation is carried out by using a numerical simulation mode, and the data is explained by using an apparent resistivity imaging method, so that the simulation result for the double piping channel is obtained as shown in fig. 10. As can be seen from comparison between fig. 9 and fig. 10, by adopting the technical scheme adopted in the embodiment of the present invention, the transmission signal source is arranged on the water surface, and compared with the conventional scheme in which the transmission signal source is arranged on the top surface ground of the dam to be measured, the simulation result obtained by the method has higher precision and higher resolution.
It can be understood that, in this embodiment, the above technical solutions may also be implemented in the form of software functional modules. If the software module is implemented as a software functional module and is not sold or used as a standalone product, the software module may be stored in a computer readable storage medium, and based on the understanding, a part of the technical solution of the present embodiment or all or part of the technical solution may be embodied in a software product stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Therefore, the present embodiment provides a computer storage medium, which stores a towed-type dam potential hazard detection program, and when the towed-type dam potential hazard detection program is executed by at least one processor, the steps of the towed-type dam potential hazard detection method in the above technical solution are implemented.
It should be noted that: the technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A towed dam hazard detection system, the system comprising: the device comprises a signal receiving device, signal processing equipment, a transmitting signal front-end device and a transmitting antenna array; the signal receiving device is arranged on a dam to be detected, and the signal processing equipment and the signal front-end device are arranged on a measuring ship staying in a water area where the dam to be detected is located; the transmitting antenna array floats on the water surface of the water area; wherein the content of the first and second substances,
the signal receiving device is connected with the signal processing equipment through a cable; the transmitting antenna array is connected with the transmitting signal front-end device through a cable, and the transmitting antenna array moves in a dragging mode along with the movement of the measuring ship.
2. The system of claim 1, wherein the transmit signal front-end means comprises: the device comprises a waveform generator, a current amplifier and a synchronous detection module; wherein the content of the first and second substances,
the waveform generator configured to generate a raw excitation signal of a duty cycle that meets measurement requirements;
the current amplifier is configured to amplify the original excitation signal according to the measurement requirement so as to enable the transmitting antenna array to radiate outwards;
the synchronization detection module is configured to detect the original excitation signal and generate a synchronization control signal for receiving synchronization.
3. The system of claim 1, wherein the transmit antenna array is disposed on a floating support floating on the surface of the body of water; the floating support comprises a frame suspension rod and an inner support suspension rod which can be extended and lengthened, and an air bag which can enable the floating support to be suspended on the water surface; wherein the content of the first and second substances,
the frame suspension rod forms a frame body of the floating support, and the inner support suspension rod is arranged in the frame body; the air bag is bound on the frame suspension rod; the frame suspension rod and the inner support suspension rod are hollow, and power lines for supplying power to the transmitting antenna array are distributed in the cavity; the frame hangs even and crisscross perpendicular arrangement of interval on the pole and has set for the waterproof joint of quantity, wherein, along the waterproof joint of horizontal direction be used for the aggregate erection inside support hangs the pole, every waterproof joint along the vertical direction is connected with and constitutes antenna column among the transmitting antenna array.
4. The system of claim 3, wherein the inner frame suspension rods are uniformly provided with waterproof joints along the vertical direction for connecting antenna columns constituting the transmitting antenna array to form a encrypted transmitting array.
5. The system of claim 3, wherein the floatation support further comprises a straight connector and a quarter-turn connector; the straight line connector can be connected with a plurality of straight bars so as to prolong the lengths of the frame suspension rod and the inner support suspension rod; the right-angled connector can form a closed connection of the vertical frame suspension rods to form a suspension frame body of the floating support
6. The system of claim 1, wherein the transmitting antenna array comprises antenna columns arranged according to a set regular shape, each of the antenna columns comprises two copper bars arranged in parallel inside the antenna column, a sliding sheet vertically contacting with the copper bars, a sliding groove arranged outside the antenna column, and a slot arranged at the edge of the sliding groove; wherein the content of the first and second substances,
the sliding piece can be moved in the sliding groove along the vertical direction, and the sliding piece can be clamped into the clamping groove to fix the length of the copper strip serving as an effective line source in the antenna column.
7. The system of claim 6, wherein coherence of electromagnetic waves radiated from the antenna column is utilized to maximize energy concentration to the dam under test while the transmitting antenna array is moved in a towed manner.
8. A towed dam hazard detection method applied to the towed dam hazard detection system of any one of claims 1 to 7, the method comprising:
after the transmitting signal front-end device and the transmitting antenna array are powered on, based on measurement requirements, transmitting parameters of transmitting signals are set through the transmitting signal front-end device, and the transmitting signals which accord with the set transmitting parameters are transmitted to the transmitting antenna array to generate an alternating electric field to radiate outwards;
the signal receiving device collects radiation echoes based on synchronous control signals generated by the transmitting signals and transmits the radiation echoes to the signal processing equipment;
and performing signal processing based on the radiation echo through signal processing equipment, and forming image data for representing the hidden danger of the dam to be detected.
9. The method of claim 8, wherein prior to powering up the transmit signal front-end device and the transmit antenna array, the method further comprises:
connecting the frame suspension rods and the inner support suspension rods according to measurement requirements to form a support frame net of the floating support 2;
connecting the antenna column according to the measurement requirement, and pushing the sliding sheet to move in the sliding groove, so that the effective length of a line source of the antenna column is adjusted, and a transmitting antenna array is formed;
inflating the balloon and placing the floating scaffold in water.
10. A computer storage medium storing a towed dike hazard detection program that when executed by at least one processor implements the steps of the towed dike hazard detection method of claim 8 or 9.
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| CN202111242120.9A CN114137621B (en) | 2021-10-25 | 2021-10-25 | Method, system and medium for detecting hidden danger of trailing dam |
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| CN202111242120.9A CN114137621B (en) | 2021-10-25 | 2021-10-25 | Method, system and medium for detecting hidden danger of trailing dam |
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