JP6640421B1 - Elastic wave exploration apparatus including self-buoyancy type elastic wave exploration module and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic wave exploration apparatus including a buoyancy type elastic wave exploration module and a method thereof. SOLUTION: An elastic wave generating unit towed at the tail of a ship, and a buoyancy-type elastic wave exploration module for receiving elastic waves towed at the tail of the elastic wave generating unit and reflected from the sea bottom, The self-buoyancy-type elastic wave exploration module is located so as to be immersed below the sea surface, and is coupled to a vibration receiving unit that receives elastic waves reflected from the sea bottom via a coupling unit with the vibration receiving unit, A buoyancy unit that provides buoyancy so that the unit is immersed below the sea level, wherein the vibration receiving unit is formed in the vibration receiving housing having a space for containing water therein, And a buoyancy housing having a space for accommodating a buoyancy body therein, the buoyancy unit comprising: an outflow / inflow opening through which water flows in and out; Body and the buoyancy A connection rod insertion opening formed on a side surface of the housing. [Selection diagram] Fig. 1

Description

  The present invention relates to an elastic wave exploration system including a buoyancy-type elastic wave exploration module capable of stably performing a three-dimensional exploration even in a shallow coastal area.

  Recently, as economic and industrial activities such as the construction of offshore wind parks and marine piers in coastal waters have increased, the need for high-quality ocean ground information in coastal waters has been increasing.

  Generally, ocean ground information is obtained through elastic wave exploration. The elastic wave exploration is performed by installing a sound source unit and a vibration receiving unit on a ship. That is, an elastic wave is generated from the sound source unit during the voyage of the ship, the generated elastic wave is reflected from the sea floor and reaches the geophone, and the received signal is analyzed to obtain marine ground information.

Exploration using the elastic wave exploration system is divided into two-dimensional exploration and three-dimensional exploration.
The two-dimensional exploration is performed using one streamer in which at least one or more geophones are arranged in the navigation direction of the ship.

  In contrast, three-dimensional exploration is performed using several streamers. In particular, three-dimensional exploration has the advantage of being able to visualize even more complex structures than two-dimensional exploration, but it has been mainly performed only on large vessels because of the need to withdraw a lot of equipment.

  However, exploration using large vessels is very restrictive in shallow coastal waters. In other words, in the case of a large spacecraft, a normal three-dimensional exploration can be performed only at a water depth exceeding a minimum of 20 m in consideration of a draft reaching 6 to 7 m and operation of equipment such as an air garn and a streamer. In other words, there is a need for an elastic wave system that can be used even for small ships so that three-dimensional exploration can be performed even in a shallow sea area at a depth of about 20 m.

  However, in Non-Patent Document 1, a streamer is installed on a small vessel and three-dimensional elastic wave exploration is performed on rivers and coasts. However, in a coastal area where tidal currents occur, the interval between streamers is not constant in the exploration process, It has failed to obtain a precise three-dimensional elastic wave stereoscopic image.

  In order to solve such a problem, Patent Literature 1 provides an apparatus using a block type frame in which the position of a geophone is fixed. However, the above exploration apparatus provided buoyancy so that the buoyancy board part was installed on the upper part of the receiving block part composed of a frame to provide the buoyancy so that the receiving block part was immersed below the sea surface. Therefore, there is a problem that the rolling phenomenon on the sea surface, that is, the phenomenon of swaying right and left, is vulnerable.

  On the other hand, Patent Literature 2 also provides a fixed elastic wave exploration device for a small boat including a structure for keeping a relative position between buoyancy receiving boards constant. However, the above exploration device also has a problem that the center of gravity is still high, and the vulnerable to the rolling phenomenon on the sea surface, because the vibration receiving box body is merely made of reinforced plastic.

Korean Registered Patent No. 10-1605406 Korean Registered Patent No. 10-1591753

VHR Marine 3D Seismics for Shallow Water Investigations; Some Practical Guidelines (Springer 2005, Tine Missien)

  SUMMARY OF THE INVENTION The present invention is directed to solving the above-described problems, and is a buoyancy-type elastic wave exploration module having a structure that is robust against rolling phenomena at sea level and has a structure capable of ensuring the stability of exploration, and an elastic wave including the module. Attempt to provide an exploration system.

  On the other hand, other objects of the present invention not explicitly stated should be additionally considered within a range that can be easily deduced from the following detailed description and other effects.

  According to one embodiment of the present invention, there is provided a self-buoyancy-type elastic wave exploration apparatus for achieving the above object, comprising: an elastic wave generator towed at the tail of a ship; and a tow at the tail of the elastic wave generator. A self-buoyancy type elastic wave exploration module that receives elastic waves reflected from the sea surface, the self-buoyancy type elastic wave detection module is located so as to be immersed below the sea surface, and transmits the elastic wave reflected from the sea bottom. A vibration receiving unit coupled to the vibration receiving unit via a connecting portion, the buoyancy unit providing buoyancy to immerse the vibration receiving unit below the sea level, wherein the vibration receiving unit has water inside; A vibration receiving housing having a space for accommodating therein, an outflow / inlet formed in the vibration receiving housing, and through which external water flows in and out, and at least one or more vibration receivers installed at a lower portion of the vibration receiving housing, The buoyancy unit Tsu DOO is characterized in that it comprises a buoyant casing having a space for accommodating the buoyant body therein, a connecting rod insertion port formed on a side surface of the buoyancy housing, a.

  In one example, the connection portion has a plate shape protruding outward from the vibration receiving housing and the buoyancy housing.

  In one example, a lower part of the vibration receiving housing further includes a truncated cone-shaped vibration receiver installation tool that protrudes inward and decreases in diameter in an inward direction. At this time, the receiver further includes a geophone case installed at one end of the geophone receiver, and a geophone cover, and a lower portion of the inner portion of the geophone case is provided to prevent the geophone from being detached outward. A step is formed, and a geophone exposing hole is formed on an upper portion of the geophone lid. When the geophone is coupled with the geophone case by screwing, the geophone installed in the geophone case is pressurized and fixed. It is characterized by doing.

  In one example, a plurality of the geophones are arranged in a line in a direction from a stern to a stern.

  In one example, a connecting rod is inserted into the connecting rod insertion port to connect a buoyancy type elastic wave exploration module or an auxiliary buoyancy module in the vertical direction of the traveling direction of the ship to additionally expand the module. At this time, when the self-buoyancy type elastic wave exploration module is expanded into a plurality through a connecting rod, only one or two of the plurality of self-buoyancy type elastic wave exploration modules are used only for the self-buoyancy type elastic wave exploration module. By installing the GPS, the position information of each of the plurality of self-buoyancy type elastic wave exploration modules is obtained.

  According to another embodiment of the present invention, there is provided an elastic wave exploration method including: providing the above-described elastic wave exploration apparatus; and connecting the elastic wave generation unit and the elastic wave exploration module to a ship. An elastic wave exploration device installation step including a step of floating on a sea surface and a step of filling water through an outflow / inlet of the vibration receiving unit for a predetermined time; An elastic wave transmitting / receiving step of towing the module, generating an elastic wave from the elastic wave generator on the sea floor, and receiving the three-dimensional elastic wave reflected from the sea bottom by the elastic wave exploration module, and transmitting the received elastic wave to a signal. An elastic wave analysis step of processing to obtain ocean ground information.

  The self-buoyancy type elastic wave exploration module according to an embodiment of the present invention is configured such that water flows into and out of the vibration receiving unit, and the elastic wave is generated by the water flowing into the vibration receiving unit during the exploration. By making the center of gravity of the exploration module low, robustness against the rolling phenomenon on the sea surface can be ensured.

  Further, since the fluid flows into the inside of the vibration receiving unit, the whole vibration receiver installed inside the vibration receiving unit is stabilized in water, and the transmission rate of the sound wave increases.

  On the other hand, in the process of moving and installing the elastic wave exploration module, the inside of the vibration receiving unit is an empty space, and thus has an advantage that it can be easily moved and installed.

  On the other hand, even if the effects are not explicitly mentioned here, the effects described in the following specification and the provisional effects expected from the technical features of the present invention are not described in the specification of the present invention. Note that it will be treated as described.

FIG. 1 is a schematic diagram of an elastic wave exploration apparatus including a self-buoyancy type elastic wave exploration module according to an embodiment of the present invention, in which an 8-channel receiving system is constructed. It is a schematic perspective view of an elastic wave exploration module of an example of the present invention. 1 is a schematic exploded perspective view of an elastic wave exploration module according to an example of the present invention. FIG. 2 is a schematic enlarged cross-sectional view of a portion where an example of the present invention is installed. It is a schematic flowchart of the elastic wave exploration method of another example of this invention.

  It is apparent that the accompanying drawings are illustrated by reference for the understanding of the technical idea of the present invention, and the scope of the present invention is not limited thereby.

  In describing the present invention, a detailed description will be omitted when it is determined that the related functions are obvious to a person skilled in the art and may make the gist of the present invention unclear. .

  On the other hand, the shallow sea area means a shallow sea within a continental shelf with a water depth of about 130 to 200 m in natural geography, but may be defined differently depending on the field. Therefore, in the present invention, the shallow sea area is not defined lexicographically, but is defined as a concept relating to the operation of an exploration ship and the characteristics of an elastic wave sound source. Defined as shallow waters.

  FIG. 1 is a schematic diagram of an elastic wave exploration apparatus including a self-buoyancy type elastic wave exploration module 100 according to an embodiment of the present invention, which constructs an 8-channel receiving system.

  Referring to FIG. 1, according to one embodiment of the present invention, an elastic wave exploration apparatus includes an elastic wave generator 2 towed at the tail of a ship 1 and a buoyancy type towed at the tail of the elastic wave generator 2. The elastic wave exploration module 100 is included.

  A reference GPS for providing a reference position of the elastic wave exploration device is installed in the ship 1 and the elastic wave generator 2. In particular, the reference GPS installed in the elastic wave generator 2 acquires the position information of the elastic generator 2 and uses it for the elastic wave analysis while performing the elastic wave exploration on the seabed topography.

  The elastic wave generation unit 2 is configured to generate an elastic wave for obtaining marine ground information such as a seabed topography. For example, the elastic wave generator 2 generates an elastic wave using an air garn, a Boomer, a Sparker, a SBP (Sub-Bottom Profilers), a chirp signal generator, or the like. I do.

  The elastic wave generated from the elastic wave generator 2 is reflected from the sea floor and then received by a receiver installed in the buoyancy type elastic wave exploration module 100 itself.

  In general, the elastic wave exploration analyzes the traveling speed and the waveform of the elastic wave to obtain the ocean ground information. However, the position of the elastic wave exploration module 100 changes regularly or irregularly due to the rolling phenomenon of the ship. . Particularly in coastal shallow waters, the sea surface is more disturbed than in deep waters due to the influence of the sea bottom.

  Conventionally, signal distortion due to a rolling phenomenon or the like has been post-corrected through various signal processing methods. However, if a signal can be received stably during a search process, a more accurate search should be performed.

  Therefore, the elastic wave exploration apparatus according to one embodiment of the present invention uses an elastic wave exploration module described later so that signals can be received more stably in the exploration process.

  FIG. 2 is a schematic perspective view of an elastic wave exploration module according to an example of the present invention, and FIG. 3 is a schematic exploded perspective view of the elastic wave exploration module according to an example of the present invention.

  With reference to FIGS. 2 and 3, the structure and function of the elastic wave exploration module 100 according to an example of the present invention will be described.

  The elastic wave exploration module 100 according to an example of the present invention includes a vibration receiving unit 100 and a buoyancy unit 30.

  The receiving unit 10 is located so as to be immersed below the sea surface during the exploration process, and serves to receive elastic waves reflected from the sea bottom.

  To this end, the buoyancy unit 30 is coupled to the vibration receiving unit 10 via the connection part 50 and provides buoyancy so that the vibration receiving unit is immersed below the sea level.

  The vibration receiving unit 10 includes a vibration receiving housing 11 having a space 13 for storing water therein. The elastic wave exploration module 100 according to an example of the present invention stores water in the space 13 of the vibration receiving housing 11 during the exploration process, and lowers the center of gravity of the elastic wave exploration module 100. Accordingly, in a search process using the elastic wave search module 100, distortion of a received signal due to a rolling phenomenon is reduced.

  However, the water contained in the space 13 of the vibration receiving housing 11 should flow in the exploration process for convenience when the acoustic wave exploration module 100 is moved and installed. Making the receiving unit 10 itself heavy or installing a separate weight to lower the center of gravity greatly wastes manpower and cost. This is especially true for small vessels. For this purpose, an outflow / inlet 15 is formed in the vibration receiving housing 11 according to an example of the present invention. At this time, a plurality of outlets 15 are arranged so that water can flow in and out.

  The shape of the vibration receiving housing 11 is a shape in which the ship width gradually increases in the stern direction from the head, like the shape of the head of the research ship, in order to move straight forward in the search process.

  A geophone box 20 is disposed below the vibration housing 11.

  FIG. 4 is a schematic enlarged sectional view of the geophone box 20.

  Referring to FIG. 4, a truncated cone-shaped receiver installation tool 17 that protrudes inward, that is, in the direction of the space 13, and has a smaller diameter is formed below the vibration receiving housing 11. At this time, the geophone 21 is disposed at one end of the geophone installation tool 17, but due to the shape of the geophone installation tool 17, noise other than the signal reflected from the sea surface flows into the geophone 21. Can be prevented.

  On the other hand, the geophone 21 is installed inside the geophone case 22. In order to prevent the geophone 21 from being detached to the outside, a segregation prevention step 23 is formed at a lower portion inside the geophone receiver 22.

  In order to fix the geophone 21, a geophone cover 24 is disposed above the geophone case 22. The geophone lid 24 is screw-coupled to the geophone case 22 and presses and fixes the geophone 21. In addition, a geophone exposure hole 25 is arranged at an upper portion of the geophone case 22. The water that has flowed into the space 13 of the vibration receiver casing 11 through the vibration receiver exposure hole 25 and the water outside the vibration receiver casing 11 maintain the state in which the vibration receiver is completely immersed in water, Improve the transmission of sound waves.

  Further, since the water at the position where the exploration is performed flows into the space 13 of the vibration receiving housing 11 through the outflow / inlet 15, an unexpected error due to a water component, a temperature change, and the like can be minimized.

  In one example of the present invention, a plurality of the geophones 21 are arranged in a line in the stern direction from the head, but for example, three may be arranged as illustrated.

  The receiver 21 may use, but is not limited to, a directional hydrophone or an omnihydrophone.

  On the other hand, the vibration receiving unit 100 of the elastic wave exploration module 100 according to an example of the present invention is provided with buoyancy by the buoyancy unit 30.

  For this purpose, the buoyancy unit 30 includes a buoyancy housing 31 in which a buoyancy body can be accommodated. At this time, the buoyant body has buoyancy floating on water, and uses air or styrofoam.

  The buoyancy housing 31 has a shape in which the width of the buoyancy housing 31 gradually increases in the direction from the head to the stern, like the shape of the head of the exploration vessel, in order to advance straight forward in the exploration process, similarly to the above-described vibration receiving housing 11. .

  A connection rod insertion port 35 is formed on a side surface of the buoyancy housing 31. The connecting rod C is inserted and fixed in the connecting rod insertion port 35, and the additional elastic wave exploration module 100 is additionally extended through the connecting rod C in the vertical direction of the traveling direction of the boat 1 as shown in FIG. .

  Alternatively, an auxiliary buoyancy module may be additionally extended in place of the additional acoustic wave exploration module 100. In the process of performing an exploration, it is necessary to adjust the depth at which the exploration is performed, but the elastic wave exploration device according to an example of the present invention adjusts the depth at which the exploration is performed by adding an auxiliary buoyancy module. .

  Further, the stability of the elastic wave exploration module 100 may be increased by using the auxiliary buoyancy module. By using the auxiliary buoyancy module to increase the overall length of the elastic wave exploration module 100 in the direction perpendicular to the traveling direction of the ship 1, the robustness against the rolling phenomenon is increased.

  A plurality of connection rod insertion ports 35 are arranged in the buoyancy housing 31, but the number is not limited thereto. That is, a sufficient number of connection rod insertion holes 35 for fixing adjacent modules may be formed. Similarly, the connecting rods C may be arranged not in a straight line but in an intersecting manner. However, by setting the connecting rod C above the sea surface, it is possible to prevent unnecessary resistance from being generated in the exploration process.

  On the upper part of the buoyancy housing 31, a communication installation tool 37 and a signal connector 39 are arranged. A communication unit 71 is connected to the communication installation tool 37 by an installation rod 72. The communication unit 71 includes a GPS for confirming a position where a search is performed, but may further include Bluetooth (Bluetooth (registered trademark)) capable of short-range communication. The GPS and Bluetooth of the communication unit 71 transmit and receive information via the antenna 73.

  The elastic wave exploration device according to one embodiment of the present invention is configured such that the communication unit 71 is not installed on the communication installation tool 37 of all the elastic wave exploration modules 100, and only a part of the plurality of elastic wave The position of all the elastic wave exploration modules 100 is confirmed by setting the position 71. Preferably, the communication unit 71 is installed only in one elastic wave exploration module 100, and the positions of all the elastic wave exploration modules 100 are confirmed. This is because the respective elastic wave exploration modules 100 are located at a preset distance from each other by the connecting rod C as described above.

  On the other hand, the vibration receiving unit 10 and the buoyancy unit 30 are connected via the connecting portion 50. For example, the vibration receiving unit 10 and the buoyancy unit 30 are flange-connected via the connecting portion 50.

  At this time, the connecting portion 50 has a plate shape protruding outward from the vibration receiving housing 11 and the buoyancy housing 31. In other words, when the connecting portion 50 is formed in a plate shape and the elastic wave detecting module 100 is operated, the connecting portion 50 functions as a horizontal wing, thereby reducing the rolling phenomenon of the elastic wave detecting module 100.

  Further, auxiliary buoyancy bodies are additionally connected to the connecting portions 50 on both sides of the elastic wave exploration module 100, and one elastic wave exploration module 100 stably performs two-dimensional elastic wave exploration.

In the elastic wave exploration device of one embodiment of the present invention, although one elastic wave exploration module 100 has buoyancy itself, water flows in the process of installing the exploration device inside the vibration receiving unit 10, This has the effect of lowering the center of gravity and reducing the rolling phenomenon.
In addition, the elastic wave exploration module 100 is additionally extended using the connecting rod C, and the depth at which the measurement is performed is adjusted using the auxiliary buoyancy module.

  An elastic wave exploration method using the elastic wave exploration apparatus according to one embodiment of the present invention described above will be described.

  FIG. 5 is a schematic flowchart of an elastic wave exploration method M100 according to another example of the present invention.

  Referring to FIG. 5, an elastic wave exploration method M100 according to another embodiment of the present invention includes an elastic wave exploration apparatus installation step S10, an elastic wave transmission / reception step S20, and an elastic wave analysis step S30.

  First, in the installation step S10 of the elastic wave exploration apparatus, the step S11 of providing the above-described elastic wave exploration apparatus of one embodiment of the present invention is performed. At this time, if the elastic wave exploration is performed in multiple channels, the elastic wave exploration modules are connected and fixed to each other by using a connecting rod as needed. Next, Step S12 of connecting the elastic wave generation unit and the elastic wave exploration module to the ship and floating on the sea surface is performed. Next, step S13 of filling the water into the vibration receiving unit through the outflow / inlet port for a predetermined time is performed.

  In the elastic wave transmission / reception step S20, as the ship progresses, the elastic wave generator generates an elastic wave on the sea floor while towing the elastic wave generator and the elastic wave exploration module, and the three-dimensional elastic wave reflected from the sea floor. Is received by the elastic wave exploration module. At this time, the position where the elastic wave is transmitted and received acquires the position information of the entire elastic wave search module through a communication unit installed in any one of the plurality of elastic wave search modules.

  The elastic wave analysis step S30 extracts and analyzes only necessary information from a signal received to obtain marine ground information through a signal processing process such as removal of influence of waves, removal of noise, and filtering. Done in a way.

  The scope of protection of the invention is not limited to the description and representation of the embodiments explicitly described above. It is further added that the protection scope of the present invention is not limited by obvious changes and substitutions in the technical field to which the present invention belongs.

Claims (8)

An elastic wave generator towed at the tail of the ship,
A buoyancy-type elastic wave exploration module itself towed at the tail of the elastic wave generator,
The buoyancy elastic wave exploration module itself,
A receiving unit that is located so as to be immersed below the sea surface and receives elastic waves reflected from the sea floor,
A buoyancy unit coupled to the vibration receiving unit via a connection unit, the buoyancy unit providing buoyancy to immerse the vibration receiving unit below the sea level,
The vibration receiving unit includes:
A vibration receiving housing having a space for containing water inside,
An outflow / inlet formed in the vibration receiving housing and through which external water flows in and out;
And a geophone installed at the lower part of the vibration housing,
The buoyancy unit,
A buoyancy housing having a space for accommodating a buoyancy body therein;
An elastic wave exploration device comprising: a connection rod insertion opening formed on a side surface of the buoyancy housing.   The elastic wave exploration device according to claim 1, wherein the connecting portion has a plate shape protruding outward from the vibration receiving housing and the buoyancy housing.   The elastic wave exploration device according to claim 1, further comprising a truncated cone-shaped geophone receiver that protrudes inward and decreases in diameter in an inward direction, at a lower portion of the vibration receiver housing. A geophone case, which is installed at one end of the geophone installation tool, and a geophone cover,
A detachment prevention step is formed at an inner lower part of the geophone case to prevent the geophone from being detached outward,
A geophone exposure hole is formed in an upper part of the geophone lid, and when the geophone is coupled with the geophone case by screwing, the geophone installed in the geophone case is pressurized and fixed. The elastic wave exploration device according to claim 3 which performs.   The elastic wave exploration device according to claim 1, wherein a plurality of the geophones are arranged in a line in a direction from a stern to a stern.   2. The stub according to claim 1, wherein a buoyancy-type elastic wave exploration module or an auxiliary buoyancy module is connected in the vertical direction of the ship by inserting a connecting rod into the connecting rod insertion port. 3. Elastic wave exploration equipment. In the case where the self-buoyancy type elastic wave exploration module is expanded into a plurality through a connecting rod,
Obtaining positional information of each of the plurality of self-buoyant elastic wave exploration modules by installing GPS only in one or two of the self-buoyant elastic wave exploration modules among the plurality of self-buoyant elastic wave modules. The elastic wave exploration device according to claim 6, wherein: Providing the elastic wave exploration device according to any one of claims 1 to 7, connecting the elastic wave generation unit and the elastic wave exploration module to a ship, and floating the sea wave surface on a sea surface; Filling the water through the outflow inlet of the vibration receiving unit during time; and
Propagating the ship, towing the elastic wave generator and the elastic wave exploration module, generating an elastic wave on the sea floor from the elastic wave generator, and receiving the three-dimensional elastic wave reflected from the sea bottom with the elastic wave exploration module An elastic wave transmitting / receiving step;
An elastic wave analysis step of performing signal processing on the received elastic wave to obtain ocean ground information.

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