CN117288372A - Towed marine controllable source electromagnetic acquisition device and system - Google Patents
Towed marine controllable source electromagnetic acquisition device and system Download PDFInfo
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- CN117288372A CN117288372A CN202311246723.5A CN202311246723A CN117288372A CN 117288372 A CN117288372 A CN 117288372A CN 202311246723 A CN202311246723 A CN 202311246723A CN 117288372 A CN117288372 A CN 117288372A
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- 230000005684 electric field Effects 0.000 claims abstract description 84
- 238000005259 measurement Methods 0.000 claims abstract description 31
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 17
- 229910052759 nickel Inorganic materials 0.000 claims description 17
- 239000010408 film Substances 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000013535 sea water Substances 0.000 claims description 9
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- 229920000271 Kevlar® Polymers 0.000 claims description 7
- 239000004761 kevlar Substances 0.000 claims description 7
- 229910052772 Samarium Inorganic materials 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 6
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000005672 electromagnetic field Effects 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 4
- 239000004700 high-density polyethylene Substances 0.000 claims description 4
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- 239000000758 substrate Substances 0.000 claims description 3
- 238000003306 harvesting Methods 0.000 claims 1
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- 230000009286 beneficial effect Effects 0.000 abstract description 2
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- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
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- 238000012545 processing Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
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- 238000005260 corrosion Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
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- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
-
- 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
Abstract
The invention discloses a towing type ocean controllable source electromagnetic acquisition device and a towing type ocean controllable source electromagnetic acquisition system. The towing type ocean controllable source electromagnetic acquisition device has the capability of single-point electric field measurement, can exist in a smaller volume through a cable shape and measure triaxial orthogonal electric fields, greatly improves the number of receiving nodes in towing electric field acquisition, is beneficial to improving weak anomaly detection capability, and can improve the resolution of a submarine target through acquired multi-component electric field data, so that the towing type ocean controllable source electromagnetic acquisition device has important significance for cost reduction and synergy of ocean oil and gas exploration.
Description
Technical Field
The invention relates to the field of geophysics, in particular to a towed marine controllable source electromagnetic acquisition device and system.
Background
The ocean electric method is one of a plurality of branch methods for ocean geophysical exploration, is used for finding out the electric structure below the seabed, and is widely applied to the field of mineral resource detection and structural geological research.
The common ocean electric method is divided into active source and passive source. The active source excites an electromagnetic field by means of a manual field source, and the receiving device observes the electromagnetic field to acquire the electrical information of the underground medium, so that the device has the advantages of high operation efficiency and high shallow resolution. The acquisition system towed at the stern of the ship comprises a transmitting source and hundreds of observation nodes, has the characteristics of high resolution and high efficiency, but can only observe an axial component electric field, cannot acquire a horizontal orthogonal component electric field and a vertical component electric field, and has insufficient weak target identification capability due to limited acquired data. The dual-ship towing controllable source electromagnetic detection system developed in China, namely a stern towing acquisition system, comprises a transmitting towed body and a plurality of receiving nodes, and is shown in figure 1. The receiving nodes of 3 (maximally supporting 5) deep towing electric fields are positioned at the offshore bottom to carry out towing measurement, and a single receiving node realizes triaxial orthogonal electric field components, but the method is limited by an electric field measurement mode, the polar distance of a pair of electric field sensors is about 2-5m, so that the receiving nodes are large in size, more receiving nodes are difficult to support for synchronous measurement during towing measurement, and the offshore operation efficiency is also influenced.
Therefore, according to the requirements of high resolution, multi-component observation and efficient operation of ocean electric detection, the current acquisition system is continuously subjected to technical innovation, and the data acquisition capacity of equipment is improved.
Disclosure of Invention
The invention provides a towing type ocean controllable source electromagnetic acquisition device and a towing type ocean controllable source electromagnetic acquisition system, which are used for solving the problem that the size is large due to the fact that a receiving node is limited by an electrode distance in the method for measuring triaxial orthogonal electric field components in the prior art, and influencing the offshore operation efficiency.
The invention relates to a towing ocean controllable source electromagnetic acquisition device which is in a cable type, wherein a plurality of receiving nodes connected in series are integrated in the acquisition device and are used for measuring the change of a triaxial orthogonal electric field in seawater, and the receiving nodes are connected with a cable through connectors.
Optionally, the receiving node includes: the measuring circuit is electrically connected with the miniature triaxial electric field sensor, and the miniature triaxial electric field sensor is loaded at the bottom of the receiving node.
Alternatively, the miniature triaxial electric field sensor includes three orthogonal electric field sensors to assume a cubic configuration, the electric field sensors being nickel-based oxide thin film sensors.
Optionally, the nickel-based oxide film sensors on the surfaces of the miniature triaxial electric field sensor are in contact with seawater in towing.
Optionally, the nickel-based oxide thin film sensor at least includes: the nickel acid samarium film is arranged on the ceramic substrate.
Optionally, a gap between the miniature triaxial electric field sensor and the measuring circuit is filled with an HDPE porous water permeable material.
Optionally, the measurement circuit includes:
the power supply module is used for supplying power to the measuring circuit;
the amplifier is used for receiving and amplifying the voltage signals acquired by the miniature triaxial electric field sensor;
the measuring module is used for receiving the amplified voltage signal and transmitting the amplified voltage signal to the microcontroller to process and store the voltage signal;
and the communication module is connected with a communication line in the acquisition device so as to communicate with the shipboard terminal.
Optionally, the method further comprises: the outer protective layer, the Kevlar rope and 4 pairs of twisted copper wires; the outer protection layer wraps the Kevlar rope and the acquisition device, and the 4 pairs of twisted copper wires are located in the outer protection layer.
Optionally, the 4 pairs of twisted copper wires include: and the pair of power lines is used for supplying power to the receiving node, and the two pairs of Ethernet lines and the pair of serial lines are used for realizing data communication between the receiving node and the shipboard terminal.
The invention discloses a towed marine controllable source electromagnetic acquisition system, which comprises:
one end of the transmitting towed body is connected with the shipborne terminal and is used for generating a high-power controllable source electromagnetic field;
the collecting device according to the previous claim, wherein the collecting device is connected with the other end of the emitting towed body.
According to the invention, a nickel-based oxide electric field sensor is introduced into an electric field towing cable acquisition device, triaxial electric field measurement is realized under the constraint of small volume, and the target detection capability is improved; more measuring nodes (comprising electrodes) are connected in series, so that the transverse resolution is improved; the microelectrode is integrated to the towing rope, so that the offshore operation efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art towed electromagnetic acquisition system;
FIG. 2 is a diagram of an electric field measurement in an embodiment of the invention;
FIG. 3 is a block diagram of a measurement circuit in an embodiment of the invention;
FIG. 4 is a schematic cross-sectional view of an acquisition device in an embodiment of the invention;
fig. 5 is a schematic structural diagram of a towed marine controllable source electromagnetic acquisition system in accordance with an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The invention provides a towed marine controllable source electromagnetic acquisition device, which is in a cable type, wherein a plurality of receiving nodes connected in series are integrated in the acquisition device and are used for measuring the change of a triaxial orthogonal electric field in seawater, and the receiving nodes are connected with a cable through connectors. Specifically, in the measurement operation mode, a plurality of receiving nodes are used for measurement, the receiving nodes are limited by electrode distances, the size is large, and more nodes are difficult to support for synchronous measurement during towing measurement. In the invention, a cable type acquisition device is adopted, and a plurality of receiving nodes connected in series are integrated in the acquisition device to ensure that the acquisition device is miniaturized enough, wherein the receiving nodes are used for measuring the change of the triaxial orthogonal electric field in the seawater so as to realize the electromagnetic acquisition of the ocean controllable source. Specifically, the receiving nodes are connected with the cables in series through connectors, which is equivalent to connecting a section of receiving nodes with a section of wires, and sequentially connecting a plurality of sections of cables with the receiving nodes together to realize mutual serial connection. A single receiving node realizes synchronous observation of three-component electric field data. Preferably, in the specific embodiment of the present invention, more receiving nodes (including electrodes) are connected in series, so as to improve the lateral resolution; the microelectrode is integrated into a cable-type acquisition device to improve the offshore operation efficiency.
The towing type ocean controllable source electromagnetic acquisition device provided by the embodiment of the invention has the capability of single-point electric field measurement, can exist in a smaller volume through a cable shape and measure triaxial orthogonal electric fields, greatly improves the number of receiving nodes in towing electric field acquisition, is beneficial to improving weak anomaly detection capability, and the acquired multi-component electric field data can improve the resolution of a submarine target, so that the towing type ocean controllable source electromagnetic acquisition device has important significance for cost reduction and synergy of ocean oil and gas exploration.
The towing ocean controllable source electromagnetic acquisition device according to the embodiment of the invention preferably, the receiving node includes: the measuring circuit is electrically connected with the miniature triaxial electric field sensor, and the miniature triaxial electric field sensor is loaded at the bottom of the receiving node. Specifically, the sensor in the receiving node adopts the miniature triaxial electric field sensor, so that the volume of the acquisition device can be reduced to the greatest extent, wherein the measurement mode of the miniature triaxial electric field sensor is different from the traditional electric field mode, the traditional electric field measurement is used for measuring the potential difference between the two sensors by means of the two electric field sensors, and the electric field intensity is obtained by dividing the pole pitch by the potential difference. In order to improve the measurement accuracy, the polar distance between the sensors is increased, the triaxial orthogonal electric field measurement is realized, the sensor distribution is more complex, and the volume of the measurement equipment is larger. The miniature triaxial electric field sensor adopted in the invention can directly perform triaxial orthogonal electric field measurement. The miniature triaxial electric field sensor is embedded in the bottom of the measuring unit, so that the miniature triaxial electric field sensor is prevented from being easily influenced by external factors in the towing and releasing processes of the towing rope.
In the towed marine controllable source electromagnetic acquisition device according to the embodiment of the present invention, preferably, the micro triaxial electric field sensor includes three orthogonal electric field sensors to form a cubic structure, and the electric field sensors are nickel-based oxide film sensors. Specifically, the measuring mode of the nickel-based oxide film sensor is to simulate the electric field sensing principle of marine organisms, and the novel underwater electric field sensor based on the rare earth nickel-based oxide senses the electric field intensity by detecting the resistance change rate caused by the fact that the electric field of the marine environment triggers the hydrogen induced phase change of samarium nickelate (ReNiO 3). Compared with the traditional AgCl electrode, the novel electrode has the characteristics of low noise and wide frequency band, has the advantages of strong ocean current interference resistance, small volume, no maintenance and long service life, and is particularly suitable for towing motion towing cable measurement application scenes. In addition, the miniature triaxial electric field sensor comprises a cube-shaped structure, and a nickel-based oxide film is arranged on the surface of the miniature triaxial electric field sensor, so that electric field measurement in the normal direction is realized by a single film, and finally three orthogonal electric field measurements are carried out. As shown in fig. 2, the electric fields Ex, ey, ez to be measured are distributed in three directions. In the specific embodiment of the invention, the miniature samarium nickelate film electric field sensor is introduced into the electric field towing cable acquisition device, so that triaxial electric field measurement can be realized under the constraint of small volume, and the target detection capability is improved. The excitation source of the circuit module in the receiving node provides excitation signals for the miniature triaxial electric field sensor under the control of the main control, and the output voltage signals are received by the measuring circuit after being amplified.
In the towing ocean controllable source electromagnetic acquisition device according to the embodiment of the invention, preferably, the nickel-based oxide film sensors on the surfaces of the miniature triaxial electric field sensor are in contact with seawater during towing. Preferably, the gap between the miniature triaxial electric field sensor and the measuring circuit is filled with HDPE porous material, so that the samarium nickelate film electric field sensor on each surface of the miniature triaxial electric field sensor in a towed neutral cube shape can be contacted with seawater, and the measurement of triaxial electric field in seawater is completed. Specifically, the HDPE porous water permeable material has the advantages of large water seepage amount, high strength, corrosion resistance and long service life, and the filling material is filled with water in the ocean towing process to assist in electric field conduction, so that the nickel-based oxide film sensors on each surface of the cubic miniature triaxial electric field sensor can measure electric field change.
The towing ocean controllable source electromagnetic acquisition device according to the embodiment of the invention preferably, the nickel-based oxide film sensor at least comprises: the nickel acid samarium film is arranged on the ceramic substrate. In a preferred embodiment, the miniature triaxial electric field sensor formed by the three orthogonal electric field sensors further comprises an excitation constant current source, a chopper amplifier and the like, wherein the weak excitation constant current source is applied to the vertical direction of the electric field to be detected, the resistance in the vertical current direction changes along with the electric field to be detected, and the chopper amplifier converts the change into voltage output.
In the towing ocean controllable source electromagnetic acquisition device according to the embodiment of the present invention, preferably, as shown in fig. 3, the measurement circuit includes:
the power supply module 301 is configured to supply power to the measurement circuit, so as to implement a power management function;
the amplifier 302 is configured to receive and amplify the voltage signal collected by the micro triaxial electric field sensor 200;
a measurement module 303 for receiving the amplified voltage signal and transmitting to the microcontroller 304;
a microcontroller 304 for processing and storing the received voltage signal;
and the communication module 305 is used for being connected with a communication line in the acquisition device so as to perform communication with the shipboard terminal.
In the towing ocean controllable source electromagnetic acquisition device according to the embodiment of the present invention, preferably, as shown in fig. 4, the acquisition device further includes: an outer sheath 401, a Kevlar rope 402 and 4 pairs of twisted copper wires; the outer protection layer wraps the Kevlar rope and the acquisition device, and the 4 pairs of twisted copper wires are located in the outer protection layer. Specifically, the outer protective layer is used for ensuring that each cable adapts to external working conditions, maintaining the stability of physical and mechanical properties, prolonging the service life and ensuring the reliability of operation; the Kevlar rope has the advantages of high temperature resistance, light weight, corrosion resistance, abrasion resistance, good mechanical property and the like, and is used for receiving the dragging of the cable.
The towing ocean controllable source electromagnetic acquisition device according to the embodiment of the invention is preferably characterized in that the 4 pairs of twisted copper wires comprise: a pair of power lines 4031 for powering the receiving node, two pairs of ethernet lines 4032 and a pair of serial lines 4033 for enabling the receiving node to communicate data with the on-board terminal.
The embodiment of the invention also provides a towed marine controllable source electromagnetic acquisition system, as shown in fig. 5, which comprises:
one end of the transmitting towed body 501 is connected with the shipboard terminal and is used for generating a high-power controllable source electromagnetic field;
and the acquisition device 502 is connected with the other end of the emission towed body.
According to the towed marine controllable source electromagnetic acquisition device and system, measurement is performed in the marine towed controllable source electromagnetic towing cable based on the miniature triaxial electric field sensor, so that on one hand, the marine electromagnetic data acquisition capability is improved, the detection resolution is improved, and the weak abnormality recognition capability is improved; on the other hand, the offshore operation efficiency is improved, and the offshore operation cost is reduced. Has important significance for pushing the offshore deep water oil gas exploration and the hydrate investigation.
It should be understood that, in the various embodiments herein, the sequence number of each process described above does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments herein.
Embodiments of the present invention also provide a computer readable storage medium storing one or more programs executable by one or more processors to implement the steps of the method for evaluating on-orbit spectral stray light based on mercury lamp characteristic spectral lines as described in any of the above embodiments.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (10)
1. The towed marine controllable source electromagnetic acquisition device is characterized in that the acquisition device is in a cable type, a plurality of receiving nodes connected in series are integrated in the acquisition device, the receiving nodes are used for measuring the change of a triaxial orthogonal electric field in seawater, and the receiving nodes are connected with a cable through connectors.
2. The towed marine controllable source electromagnetic acquisition device of claim 1, wherein said receiving node includes: the measuring circuit is electrically connected with the miniature triaxial electric field sensor, and the miniature triaxial electric field sensor is loaded at the bottom of the receiving node.
3. The towed marine controlled source electromagnetic acquisition device of claim 2, wherein said miniature triaxial electric field sensor includes three orthogonal electric field sensors to assume a cubic configuration, said electric field sensors being nickel-based oxide thin film sensors.
4. A towed marine controllable source electromagnetic acquisition device of claim 3, wherein the nickel-based oxide film sensors on each surface of said miniature triaxial electric field sensor are in contact with seawater during towing.
5. A towed marine controllable source electromagnetic acquisition device according to claim 3, wherein said nickel-based oxide thin film sensor includes at least: the nickel acid samarium film is arranged on the ceramic substrate.
6. The towed marine controllable source electromagnetic acquisition device of claim 2, wherein a void between said miniature triaxial electric field sensor and said measurement circuit is filled with an HDPE porous water permeable material.
7. The towed marine controllable source electromagnetic acquisition device of claim 2, wherein said measurement circuit includes:
the power supply module is used for supplying power to the measuring circuit;
the amplifier is used for receiving and amplifying the voltage signals acquired by the miniature triaxial electric field sensor;
the measuring module is used for receiving the amplified voltage signal and transmitting the amplified voltage signal to the microcontroller to process and store the voltage signal;
and the communication module is connected with a communication line in the acquisition device so as to communicate with the shipboard terminal.
8. The towed marine controllable source electromagnetic acquisition device of claim 2, further comprising: the outer protective layer, the Kevlar rope and 4 pairs of twisted copper wires; the outer protection layer wraps the Kevlar rope and the acquisition device, and the 4 pairs of twisted copper wires are located in the outer protection layer.
9. The towed marine controllable source electromagnetic acquisition device of claim 8, wherein said 4 pairs of twisted copper wires include: and the pair of power lines is used for supplying power to the receiving node, and the two pairs of Ethernet lines and the pair of serial lines are used for realizing data communication between the receiving node and the shipboard terminal.
10. A towed marine controllable source electromagnetic acquisition system, said system comprising:
one end of the transmitting towed body is connected with the shipborne terminal and is used for generating a high-power controllable source electromagnetic field;
a harvesting device as claimed in any one of claims 1 to 9, connected to the other end of the emitting towed body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311246723.5A CN117288372A (en) | 2023-09-26 | 2023-09-26 | Towed marine controllable source electromagnetic acquisition device and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311246723.5A CN117288372A (en) | 2023-09-26 | 2023-09-26 | Towed marine controllable source electromagnetic acquisition device and system |
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| CN117288372A true CN117288372A (en) | 2023-12-26 |
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|---|---|---|---|
| CN202311246723.5A Pending CN117288372A (en) | 2023-09-26 | 2023-09-26 | Towed marine controllable source electromagnetic acquisition device and system |
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| Country | Link |
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| CN (1) | CN117288372A (en) |
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2023
- 2023-09-26 CN CN202311246723.5A patent/CN117288372A/en active Pending
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