CN108415091B - Towed marine electromagnetic data acquisition cable - Google Patents
Towed marine electromagnetic data acquisition cable Download PDFInfo
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- CN108415091B CN108415091B CN201810271044.6A CN201810271044A CN108415091B CN 108415091 B CN108415091 B CN 108415091B CN 201810271044 A CN201810271044 A CN 201810271044A CN 108415091 B CN108415091 B CN 108415091B
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- 239000003990 capacitor Substances 0.000 claims abstract description 37
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 35
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 25
- 230000003287 optical effect Effects 0.000 claims description 23
- 230000005684 electric field Effects 0.000 claims description 17
- 238000013500 data storage Methods 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000010287 polarization Effects 0.000 abstract description 3
- 230000005672 electromagnetic field Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 6
- 239000013535 sea water Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
- G01V3/165—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat operating with magnetic or electric fields produced or modified by the object or by the detecting device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a towed marine electromagnetic data acquisition cable, which comprises an acquisition cable jacket, wherein the acquisition cable jacket is a long-strip-shaped hollow cavity, one end of the cavity is provided with a cable hole communicated with the inside of the cavity, a nonmagnetic cable and a cable are arranged in the cable hole, one end of the nonmagnetic cable is connected with an inner cavity of one end of the cavity far away from the cable hole, the other end of the nonmagnetic cable is arranged outside the cavity through the cable hole, n electrode brackets are uniformly distributed in the cavity, n is a positive integer, the electrode brackets are connected with the inner wall of the cavity, at least one electrode mounting hole which is transparent inside and outside is arranged at the position of each electrode bracket corresponding to the acquisition cable jacket, a tantalum capacitor unpolarized electrode connected with the corresponding electrode bracket is arranged in the electrode mounting hole, and a signal acquisition unit is arranged between the two electrode brackets in the cavity. The invention has the advantages of reducing electrode polarization effect, reducing noise level and being convenient for detecting weak ocean electromagnetic field signals.
Description
Technical Field
The invention relates to the technical field of marine exploration, in particular to a towed marine electromagnetic data acquisition cable.
Background
Ocean contains abundant resources, 70% of the earth surface is covered by ocean, and various mineral resources such as petroleum, natural gas and rare metals have extremely abundant reserves on the ocean floor, and the resources are to be ascertained, developed and utilized. In the technical field of marine exploration, marine electromagnetic data has important significance for exploration and comprehensive evaluation of submarine minerals, oil and gas resources and the like.
The existing marine electromagnetic data acquisition modes mainly comprise two types: the first type is that a marine electromagnetic data acquisition cable is towed to advance in sea water or is laid on the sea bottom, a marine electromagnetic (current) excitation source is towed in the water to be excited, and the towed marine electromagnetic data acquisition towing cable or the electromagnetic data acquisition cable laid on the sea bottom is submerged to synchronously acquire the marine electromagnetic data. The second type is that the independent ocean electromagnetic data acquisition station sinks, and an ocean electromagnetic (current) excitation source is dragged and excited in water, and the electromagnetic data acquisition station of the sink acquires ocean electromagnetic data.
The current electrode for measuring the electric field component along the cable direction by using the marine electromagnetic towing cable in the industry is a common metal ring electrode, and a non-polarized electrode is not adopted, so that the electrode has a large polarization effect, the noise level of the electrode is high, and the detection of a weak marine electric field signal of a deep stratum with a large offset distance or below the sea bottom is not facilitated. The silver chloride unpolarized electrode widely used in the submerged ocean electromagnetic data acquisition station is required to be soaked in seawater or brine for preservation all the time, and the special cylindrical structure of the silver chloride unpolarized electrode is not applicable to a towed ocean electromagnetic data acquisition cable for measuring ocean electric field components along the cable direction.
Disclosure of Invention
The invention aims to solve the defects of the technology and provides a towing type marine electromagnetic data acquisition cable with stable performance and reliable quality.
The technical scheme of the invention is as follows:
the utility model provides a towed marine electromagnetic data acquisition cable, includes gathers the cable overcoat, gather the cable overcoat and be rectangular shape and inside hollow cavity, cavity one end is equipped with the communicating cable hole in with the cavity, be equipped with non-magnetic cable and cable in the cable hole, the one end of non-magnetic cable links to each other with the inner chamber that cable hole one end was kept away from to the cavity, the other end of non-magnetic cable passes through the cable hole and establishes in the cavity outside, the inside equipartition of cavity is equipped with n electrode holder, n is the positive integer, electrode holder links to each other with the cavity inner wall, and every electrode holder corresponds to gather cable overcoat position and is equipped with at least one inside and outside penetrating electrode mounting hole, be equipped with the tantalum capacitor unpolarized electrode that links to each other with corresponding electrode holder in the electrode mounting hole, be equipped with electric field signal acquisition unit in the cavity between two electrode holders, electric field signal acquisition unit links to each other with the cable, gather cable overcoat and non-magnetic cable, capacitor holder and cable seal formation sealed cavity.
The electrode mounting hole is an annular hole, the tantalum capacitor unpolarized electrode is annular, and the inner circle of the tantalum capacitor unpolarized electrode is sleeved on the outer circle of the corresponding electrode bracket.
The tantalum capacitor unpolarized electrode is rectangular, the electrode mounting holes are rectangular holes uniformly distributed, and the tantalum capacitor unpolarized electrode is arranged in the rectangular holes and is connected with the outer circle surface of the electrode support.
The acquisition cable jacket comprises a guide cable jacket and a signal cable jacket, the guide cable jacket is a hemisphere, the signal cable jacket is a cylinder, the diameter of the hemisphere is equal to that of the cylinder, the center surface of the hemisphere is connected with one end of the cylinder, and the electrode support is arranged inside the signal cable jacket.
The surface that tantalum capacitor unpolarized electrode and electrode support link to each other is equipped with the electrode lead, the signal acquisition unit is equipped with electric field signal amplifier, analog-to-digital conversion module, three component attitude sensor, three component magnetic field sensor, warm salt depth record appearance, data storage module and data transmission module, electrode lead between two adjacent tantalum capacitor unpolarized electrodes links to each other with electric field signal amplifier's input, electric field signal amplifier's output, three component attitude sensor's signal output part and three component magnetic field sensor's signal output part respectively with analog-to-digital conversion module's input correspondence link to each other, analog-to-digital conversion module's output and warm salt depth record appearance's signal output part link to each other with data storage module's input, data storage module's output links to each other with data transmission module's input.
The optical cable is arranged in the cable hole, the signal acquisition unit is further provided with an acquisition cable photoelectric conversion transmission module, the acquisition cable photoelectric conversion transmission module is provided with an electric signal input end and an optical signal output end, the electric signal input end of the acquisition cable photoelectric conversion transmission module is connected with the input end of the data transmission module, and the optical signal output end of the acquisition cable photoelectric conversion transmission module is correspondingly connected with the optical cable.
The outer surface of the acquisition cable is uniformly provided with buoys, the distance range between the buoys is 100m-500m, a GPS timing positioning module is arranged in the buoys, and the GPS timing positioning module is correspondingly connected with the input end of a data storage module in the acquisition cable through a cable.
The width of the electrode support is larger than or equal to that of the tantalum capacitor unpolarized electrode, and the outer surface of the tantalum capacitor unpolarized electrode and the outer surface of the corresponding position of the acquisition cable jacket are positioned on the same horizontal plane.
The electrode support is characterized in that a reinforcing support is arranged between the inner side walls of the electrode support, the reinforcing support is in a crisscross shape, a fixing hole is formed in the center of the reinforcing support, 4 ends of the reinforcing support are connected with the inner side walls of the electrode support, a non-magnetic cable penetrates through the fixing hole and then is connected with an inner cavity of one end, far away from the cable hole, of the cavity, and the collecting unit is bound on the non-magnetic cable through a binding belt or a cable.
The distance between the two adjacent electrode supports is in the range of 10m-100m.
The beneficial effects of the invention are as follows: the electrode polarization effect of the towed marine electromagnetic data acquisition cable can be reduced, the noise level of the electrode is reduced, the detection of weak marine electromagnetic field signals of a large offset distance or deep stratum below the seabed is facilitated, and the quality and reliability of marine electromagnetic data acquired by the towed marine electromagnetic data acquisition cable are greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
FIG. 4 is a cross-sectional view of a ring electrode and electrode holder;
FIG. 5 is a cross-sectional view of a rectangular electrode with a collection cable jacket and electrode support;
FIG. 6 is a schematic representation of the use of the present invention;
FIG. 7 is a block diagram of a signal transmission system of the present invention;
fig. 8 is a system block diagram of a signal acquisition unit of the present invention.
The marks in the figure: 1. the system comprises a collecting cable jacket, a non-magnetic cable, a signal collecting system, a tantalum capacitor non-polarized electrode, an electrode bracket, 6, sea water, 7, a buoy, 8, a towing current source, 9, a marine electromagnetic towing vessel, 11, a guiding cable jacket, 12, a signal cable jacket, 41, an electrode lead, 51, a connecting part, 52, a reinforcing support, 53, a fixing hole, 54, a second sealing layer, 71, a buoy cable, 111, a cable hole and 112, and a first sealing layer.
Detailed Description
The invention will be further described with reference to the drawings and specific examples to aid in understanding the context of the invention.
As shown in fig. 1-3, the invention provides a towed marine electromagnetic data acquisition cable, which is provided with an acquisition cable jacket 1, wherein the acquisition cable jacket 1 is a long-strip-shaped cavity with a hollow inside.
The acquisition cable jacket 1 is provided with a guide cable jacket 11 and a signal cable jacket 12, the guide cable jacket 11 may be a hemispherical body or a semi-elliptical body, and the signal cable jacket 12 may be a cylindrical body or an elliptical body with one end open.
The inner cavity of the signal cable jacket 12 is provided with n electrode brackets 5, n is a positive integer, n is more than or equal to 2, the electrode brackets 5 are matched with the acquisition cable jacket 1 for use, and if the guide cable jacket 11 adopts a semi-ellipsoid, the signal cable jacket 12 adopts an ellipsoid, the electrode brackets 5 adopt an ellipsoid ring structure; the guiding cable jacket 11 adopts a hemispheroid, the signal cable jacket 12 adopts a cylinder, and the electrode bracket 5 adopts a torus structure.
In this embodiment, the guiding cable sheath 11 is a hemisphere, the signal cable sheath 12 is a cylinder, and the electrode support 5 is a torus structure.
The diameter of the hemisphere is equal to that of the cylinder, the center surface of the hemisphere is connected with one end of the opening of the cylinder, and one end of the guide cable jacket 11 far away from the signal column jacket 12 is provided with a cable hole 111 communicated with the cavity.
The electrode bracket 5 is provided with a connecting part 51, the connecting part 51 is a torus, the diameter of the outer circle of the connecting part 51 is smaller than or equal to the diameter of the inner circle of the signal cable jacket 12, the outer circle of the connecting part 51 is matched with the diameter of the inner circle of the signal cable jacket 12, the inner circle side wall of the connecting part 51 is provided with a reinforcing support 52, the reinforcing support 52 is in a cross shape, the center of the reinforcing support 52 is provided with a fixing hole 53, and the 4 end parts of the reinforcing support are respectively and vertically connected with the inner circle side wall of the connecting part 51.
The connecting portion 51 of each electrode holder 5 is provided with at least one electrode mounting hole penetrating inside and outside corresponding to the signal cable jacket 12.
The electrode mounting holes may be annular grooves, or may be a plurality of holes formed in the signal cable jacket 12 and communicating with the cavity.
The electrode mounting hole is internally provided with a tantalum capacitor unpolarized electrode 4, the tantalum capacitor unpolarized electrode 4 is connected with the outer circular side wall of the connecting part 51, and the tantalum capacitor unpolarized electrode 4 is arranged in the electrode mounting hole through a second sealing layer 54.
As shown in fig. 4, the electrode mounting hole is an annular groove formed in the signal cable jacket 12, the inner cavity of the annular groove collecting cable jacket 1 is transparent, the tantalum capacitor unpolarized electrode 4 is annular, the tantalum capacitor unpolarized electrode 4 is sleeved on the outer circle of the connecting portion 51, and the tantalum capacitor unpolarized electrode 4 is sealed and arranged in the annular groove through the second sealing layer 54 by the tantalum capacitor unpolarized electrode 4, so that the tightness of the inner cavity of the collecting cable jacket 1 is ensured.
As shown in fig. 5, the electrode mounting holes are 4 rectangular holes which are all arranged on the signal cable jacket 12, the rectangular holes are transparent to the inner cavity of the acquisition cable jacket 1, and the tantalum capacitor electric unpolarized electrode 4 is hermetically arranged in the rectangular holes through the second sealing layer 54 by the tantalum capacitor electric unpolarized electrode 4, so that the tightness of the inner cavity of the acquisition cable jacket 1 is ensured.
The distance between the outer surface of the tantalum capacitor unpolarized electrode 4 and the center of the signal cable jacket 12 is smaller than or equal to the distance between the outer wall of the signal cable jacket 12 and the center of the signal cable jacket 12.
Preferably, the outer surface of the tantalum capacitor unpolarized electrode 4 is at the same level as the outer surface of the corresponding position of the signal cable jacket 12.
The cable hole 111 is internally provided with a nonmagnetic cable 2, a cable and an optical cable, one end of the nonmagnetic cable 2 is connected with an inner cavity of the signal cable jacket 12 far away from one end of the cable hole 111 after passing through the fixing hole 53 in the center of each reinforcing support 52, and the other end of the nonmagnetic cable 2 is arranged outside the acquisition cable jacket 1 through the cable hole 111.
The nonmagnetic cable 2, the electric cable and the optical cable keep the inner cavity of the collecting cable jacket 1 sealed by the first sealing layer 112.
The first seal layer 112 and the second seal layer 54 are formed by adhesive bonding.
A signal acquisition unit 3 is arranged between the two electrode brackets 5, the signal acquisition unit 3 is bundled on the nonmagnetic cable 2 through a binding belt or a cable, and one end of the cable arranged in the inner cavity of the acquisition cable jacket 1 is correspondingly connected with the acquisition system 3.
Preferably, the signal acquisition unit 3 is arranged in a central position between the two electrode holders 5.
The distance between two adjacent electrode holders 5 ranges from 10m to 100m.
As shown in fig. 6, buoys 7 are uniformly distributed on the outer surface of the collecting cable, a GPS timing positioning module is arranged in each buoy 7, the distance between two adjacent buoys 7 is 100m-500m, the GPS timing positioning module is provided with an antenna, the buoys 7 are connected with the collecting cable through a buoy cable 71, and the length of the buoy cable 71 is the depth of the collecting cable in the seawater 6.
The acquisition cable is connected to a streamer vessel 9 by a non-magnetic cable 2, the streamer vessel 9 being provided with a towed current source 8 through the current source cable.
The surface of the tantalum capacitor unpolarized electrode 4 connected with the electrode bracket 5 is provided with an electrode lead 41.
As shown in fig. 7 and 8, the marine electromagnetic streamer operation ship 9 is provided with a control center and a control center photoelectric conversion module, and the control center photoelectric conversion module is provided with an optical signal input end and an electric signal output end.
The signal acquisition unit 3 between two adjacent electrode brackets 5 is provided with an electric field signal amplifier, an analog-to-digital conversion module, a three-component attitude sensor, a three-component magnetic field sensor, a temperature and salt depth recorder, a data storage module, a data transmission module and an acquisition cable photoelectric conversion transmission module, the acquisition cable photoelectric conversion transmission module is provided with an electric signal input end and an optical signal output end, electrode leads 41 between two adjacent tantalum capacitor unpolarized electrodes 4 are connected with the input end of the electric field signal amplifier, the output end of the electric field signal amplifier, the signal output end of the three-component attitude sensor and the signal output end of the three-component magnetic field sensor are respectively connected with the input end of the analog-to-digital conversion module correspondingly, the output end of the analog-to-digital conversion module and the signal output end of the temperature and salt depth recorder are respectively connected with the input end of the data storage module, the output end of the data storage module is connected with the input end of the data transmission module, the optical signal output end of the acquisition cable photoelectric conversion transmission module is connected with one end of the acquisition cable photoelectric conversion transmission module, the optical signal output end of the acquisition cable photoelectric conversion transmission module is correspondingly connected with one end of the optical cable in the acquisition cable, one end of the optical cable is connected with one end of the optical cable far away from the cable, the control center is connected with the optical signal conversion module is connected with the control center through the optical cable.
The signal end of the GPS timing positioning module is connected with the input end of the data storage module of the nearest signal acquisition unit.
Preferably, the analog-to-digital conversion module adopts a 9-channel 32-bit analog-to-digital conversion module.
The tantalum capacitor unpolarized electrode 4 transmits electric field signals to the analog-to-digital conversion module after amplifying and filtering the electric field signals through the electric field signal amplifier, the three-component attitude sensor and the three-component magnetic field sensor transmit corresponding signals to the analog-to-digital conversion module, the analog-to-digital conversion module converts the analog signals into digital signals and transmits the digital signals to the corresponding data storage module, the GPS timing positioning module and the temperature and salt depth recorder transmit corresponding digital electric signals to the corresponding data storage module, the data storage module transmits the internally stored digital electric signals to the corresponding data transmission module, the data transmission module between two adjacent electrode brackets 5 transmits the received digital electric signals to the acquisition cable photoelectric conversion transmission module, the acquisition cable photoelectric conversion transmission module converts the received digital signals into optical signals and transmits the optical signals to the control center photoelectric conversion module through the optical cable, and the control center photoelectric conversion module converts the received optical signals into digital electric signals and transmits the digital electric signals to the control center, and the control center stores the acquired various signals and processes and analyzes the digital signals.
When the marine electromagnetic data acquisition operation is carried out, the marine electromagnetic towing cable operation ship 9 tows the towing current source 8 and the acquisition cable slowly forwards, the towing current source 8 continuously transmits low-frequency domain or time domain current signals into water through two power supply electrodes (transmitting antennas) which are hundreds of meters away, the transmitted current waveform can be sine waves, square waves, positive and negative square waves with the duty ratio of 1 and the like, the underwater towing current source 8 transmits current into water, two adjacent tantalum capacitor unpolarized electrodes 4 on the acquisition cable acquire controllable source electric field data along the cable direction, the three-component magnetic field sensor acquires controllable source three-component magnetic field data, the temperature and salt depth recorder and the three-component attitude sensor in the towing cable synchronously acquire temperature and salt depth data and three-component attitude data of the acquisition cable, and the GPS timing positioning module transmits real-time and position data to a control center through the acquisition cable for later towing electromagnetic data processing and comprehensive interpretation.
It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the above description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
However, the foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention are intended to fall within the scope of the claims.
Claims (9)
1. A towed marine electromagnetic data acquisition cable, characterized by: the device comprises a collecting cable jacket, wherein the collecting cable jacket is a long-strip-shaped hollow cavity, one end of the cavity is provided with a cable hole communicated with the inside of the cavity, a nonmagnetic cable and a cable are arranged in the cable hole, one end of the nonmagnetic cable is connected with an inner cavity of one end of the cavity far away from the cable hole, the other end of the nonmagnetic cable is arranged outside the cavity through the cable hole, n electrode brackets are uniformly distributed in the cavity, n is a positive integer, the electrode brackets are connected with the inner wall of the cavity, each electrode bracket is provided with at least one electrode mounting hole which is transparent inside and outside corresponding to the position of the collecting cable jacket, a tantalum capacitor unpolarized electrode connected with the corresponding electrode bracket is arranged in the electrode mounting hole, a signal collecting unit is arranged between two electrode brackets in the cavity, an electrode lead is arranged on the surface of the tantalum capacitor unpolarized electrode connected with the electrode bracket, and an electrode between two adjacent tantalum capacitor unpolarized electrodes are connected with the signal collecting unit; a reinforcing support is arranged between the inner side walls of the electrode brackets, the reinforcing support is in a crisscross shape, and a fixing hole is formed in the center of the reinforcing support; the acquisition cable jacket is sealed with the nonmagnetic cable, the capacitor bracket and the cable to form a sealed cavity;
the optical cable is arranged in the cable hole, the signal acquisition unit is further provided with an acquisition cable photoelectric conversion transmission module, the acquisition cable photoelectric conversion transmission module is provided with an electric signal input end and an optical signal output end, the electric signal input end of the acquisition cable photoelectric conversion transmission module is connected with the input end of the data transmission module, and the optical signal output end of the acquisition cable photoelectric conversion transmission module is correspondingly connected with the optical cable.
2. The towed marine electromagnetic data acquisition cable of claim 1, wherein: the electrode mounting hole is an annular hole, the tantalum capacitor unpolarized electrode is annular, and the inner circle of the tantalum capacitor unpolarized electrode is sleeved on the outer circle of the corresponding electrode bracket.
3. The towed marine electromagnetic data acquisition cable of claim 1, wherein: the tantalum capacitor unpolarized electrode is rectangular, the electrode mounting holes are rectangular holes uniformly distributed, and the tantalum capacitor unpolarized electrode is arranged in the rectangular holes and is connected with the outer circle surface of the electrode support.
4. The towed marine electromagnetic data acquisition cable of claim 1, wherein: the acquisition cable jacket comprises a guide cable jacket and a signal cable jacket, the guide cable jacket is a hemisphere, the signal cable jacket is a cylinder, the diameter of the hemisphere is equal to that of the cylinder, the center surface of the hemisphere is connected with one end of the cylinder, and the electrode support is arranged inside the signal cable jacket.
5. The towed marine electromagnetic data acquisition cable of any of claims 1-4, wherein: the signal acquisition unit is provided with an electric field signal amplifier, an analog-to-digital conversion module, a three-component attitude sensor, a three-component magnetic field sensor, a temperature and salt depth recorder, a data storage module and a data transmission module, wherein the output end of the electric field signal amplifier, the signal output end of the three-component attitude sensor and the signal output end of the three-component magnetic field sensor are respectively and correspondingly connected with the input end of the analog-to-digital conversion module, the output end of the analog-to-digital conversion module and the signal output end of the temperature and salt depth recorder are respectively connected with the input end of the data storage module, and the output end of the data storage module is connected with the input end of the data transmission module.
6. The towed marine electromagnetic data acquisition cable of claim 5, wherein: the outer surface of the acquisition cable is uniformly provided with buoys, the distance range between the buoys is 100m-500m, a GPS timing positioning module is arranged in the buoys, and the GPS timing positioning module is correspondingly connected with the input end of a data storage module in the acquisition cable through a cable.
7. The towed marine electromagnetic data acquisition cable of claim 5, wherein: the width of the electrode support is larger than or equal to that of the tantalum capacitor unpolarized electrode, and the outer surface of the tantalum capacitor unpolarized electrode and the outer surface of the corresponding position of the acquisition cable jacket are positioned on the same horizontal plane.
8. The towed marine electromagnetic data acquisition cable of claim 7, wherein: the non-magnetic cable is connected with the inner cavity of one end of the cavity far away from the cable hole after penetrating through the fixing hole, and the acquisition unit is bundled on the non-magnetic cable through a binding belt or a cable.
9. The towed marine electromagnetic data acquisition cable of claim 8, wherein: the distance between the two adjacent electrode supports is in the range of 10m-100m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810271044.6A CN108415091B (en) | 2018-03-29 | 2018-03-29 | Towed marine electromagnetic data acquisition cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810271044.6A CN108415091B (en) | 2018-03-29 | 2018-03-29 | Towed marine electromagnetic data acquisition cable |
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| CN108415091A CN108415091A (en) | 2018-08-17 |
| CN108415091B true CN108415091B (en) | 2024-04-05 |
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| CN201810271044.6A Active CN108415091B (en) | 2018-03-29 | 2018-03-29 | Towed marine electromagnetic data acquisition cable |
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| CN110261914B (en) * | 2019-05-23 | 2024-08-16 | 西安深维智能科技有限公司 | Underwater electromagnetic detector capable of distinguishing azimuth |
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