CN207096467U - A kind of near Sea Bottom hydrate detection system - Google Patents
A kind of near Sea Bottom hydrate detection system Download PDFInfo
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- CN207096467U CN207096467U CN201720554957.XU CN201720554957U CN207096467U CN 207096467 U CN207096467 U CN 207096467U CN 201720554957 U CN201720554957 U CN 201720554957U CN 207096467 U CN207096467 U CN 207096467U
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Abstract
The utility model discloses a kind of near Sea Bottom hydrate detection system, and the detection system includes boat-carrying part and drags part deeply；The boat-carrying part includes：Comprehensively monitoring main frame, monitoring host computer send triggering collection pulse signal, and transmit to deep and drag part；And the deep near Sea Bottom information for dragging part to gather is received, and the near Sea Bottom situation is determined according near Sea Bottom information；Drag part to include data acquisition unit deeply, according to triggering collection pulse signal, gather the near Sea Bottom information of current position；Spark source, electric spark vibration signal is produced according to triggering collection pulse signal；Multi-channel data acquisition electronic compartment, it is connected respectively with comprehensively monitoring main frame, data acquisition unit and spark source, by triggering collection pulse signal transmission to spark source and data acquisition unit；And the near Sea Bottom information transfer of data acquisition unit collection, so as to reduce fresnel radius, is improved into the resolution ratio of detection to comprehensively monitoring main frame.
Description
Technical Field
The utility model relates to a marine exploration technical field especially relates to a coastal waters bottom hydrate detection system.
Background
The natural gas hydrate resource exploration is generally based on the mineral exploration geological theory, and the means of combining the geophysics with the geochemistry is comprehensively adopted, so that the deep-towed seismic exploration and the offshore bottom in-situ geochemical analysis are the most effective means. The hydrate resource exploration in the main sea area of China gradually enters the stages of detailed exploration and trial exploitation, the conventional multi-channel seismic system has insufficient resolution and is difficult to meet the requirement of finely depicting the spatial distribution of ore bodies, and the conventional underground measuring equipment has poor precision and low efficiency and cannot identify and indicate weak abnormality of the ore bodies. In addition, due to attenuation of acoustic waves (particularly high frequency components) by seawater, the detection resolution and penetration depth of deep sea formations by conventional seismic equipment are reduced; and the fresnel radius is large and the resolution is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an offshore bottom hydrate detection system can reduce the Fresnel radius, improves the resolution ratio of surveying.
In order to achieve the above object, the utility model provides a following scheme:
an offshore bottom hydrate detection system, the detection system comprising a shipborne section and a deep towed section; wherein,
the on-board portion includes: the comprehensive monitoring host is used for sending out a trigger acquisition pulse signal and transmitting the trigger acquisition pulse signal to the deep dragging part; receiving offshore bottom information acquired by the deep-towed part, and determining the offshore bottom condition according to the offshore bottom information;
the deep-towed section includes:
the data acquisition unit is used for acquiring the offshore bottom information at the current position according to the trigger acquisition pulse signal;
the electric spark vibration source is used for generating an electric spark vibration signal according to the trigger acquisition pulse signal so as to vibrate the seawater;
the multi-channel data acquisition electronic cabin is respectively connected with the comprehensive monitoring host, the data acquisition unit and the electric spark source and is used for transmitting a trigger acquisition pulse signal to the electric spark source and the data acquisition unit; and transmitting the offshore information acquired by the data acquisition unit to the integrated monitoring host.
Optionally, the electric spark source includes:
the control module is connected with the multi-channel data acquisition electronic cabin and used for outputting a vibration control signal according to the trigger acquisition pulse signal;
the discharging module is connected with the control module and used for discharging under the control of the vibration control signal to generate an electric spark vibration signal;
and the energy storage module is connected with the discharging module and used for providing discharging energy for the discharging module.
Optionally, the electric spark source further includes:
and the charging module is connected with the energy storage module and is used for charging the energy storage module.
Optionally, the data acquisition unit includes:
the digital receiving cable is connected with the multi-channel data acquisition electronic cabin and used for receiving the reflection information of the near-seabed stratum after the seawater is vibrated and sending the reflection information to the multi-channel data acquisition electronic cabin;
the responder is connected with the multi-channel data acquisition electronic cabin and used for determining the current position information close to the seabed and sending the position information to the multi-channel data acquisition electronic cabin;
the attitude sensor is connected with the multi-channel data acquisition electronic cabin and used for detecting the current three-dimensional motion attitude of the digital receiving cable and sending the attitude to the multi-channel data acquisition electronic cabin;
the depth measurer is connected with the multi-channel data acquisition electronic cabin, is used for measuring the depth of the digital receiving cable penetrating into the near seabed, and sends the depth to the multi-channel data acquisition electronic cabin;
the height measurer is connected with the multi-channel data acquisition electronic cabin, is used for measuring the linear length of the digital receiving cable, and sends the linear length to the multi-channel data acquisition electronic cabin;
the multi-channel data acquisition electronic cabin is also used for arranging and sorting the reflection information, the position information, the depth and the straight line length and converting the reflection information, the position information, the depth and the straight line length into optical signals.
Optionally, the deep-dragging part further includes:
and the photoelectric composite connector is arranged between the multi-channel data acquisition electronic cabin and the digital receiving cable.
Optionally, the digital receiving cable includes:
a streamer body;
a hydrophone array, equally spaced within the streamer body, for receiving reflected waves from the offshore floor formation;
the filter amplifier is connected with the hydrophone array and used for filtering and amplifying the reflected wave;
and the A/D conversion module is respectively connected with the filter amplifier and the multi-channel data acquisition electronic cabin and is used for converting the analog signals of the reflected waves processed by the filter amplifier into digital signals and sending the digital signals to the multi-channel data acquisition electronic cabin.
Optionally, the arrangement distance of the hydrophone array is 50 m.
Optionally, the detection system further comprises a towed body, and the deep towed part is fixed on the towed body;
the towed body comprises a main body frame, a flow guide cover and a balance tail wing;
the head end of the main body frame is provided with the air guide sleeve, the electric spark source is arranged inside the main body frame, and two sides of the tail of the main body frame are provided with balance tail wings;
the inside of kuppe is provided with the data acquisition unit.
Optionally, the shipborne part further comprises: the GPS navigation unit, the ultra-short baseline positioning unit, the storage unit and the display array are respectively connected with the comprehensive monitoring host.
Optionally, the detection system further includes:
and the photoelectric composite towing cable is arranged between the comprehensive monitoring host and the data acquisition unit and is used for information interaction.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model discloses coastal waters bottom hydrate detection system can survey coastal waters bottom information in coastal waters bottom position through setting up deep dragging partial data acquisition unit, electric spark source and multichannel data acquisition electronic cabin, reduces target layer department fresnel radius; the noise of the offshore environment is low, and the signal to noise ratio can be improved; and then set up the comprehensive monitoring host computer through the shipborne part, can confirm the offshore situation accurately, improve the resolution ratio to the survey of the mineral distribution of hydration.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic block diagram of an embodiment of the present invention;
FIG. 2 is a block diagram of an electrical spark source of an embodiment of the present invention for an underwater hydrate detection system;
FIG. 3 is an assembled view of the mop body and the deep mop.
Description of the symbols:
1-shipborne part, 11-integrated monitoring host, 12-GPS navigation unit, 13-ultrashort baseline positioning unit, 14-storage unit, 15-display array, 2-deep dragging part, 21-data acquisition unit, 210-transponder, 211-depth measurer and height measurer, 212-photoelectric composite connector, 213-electric junction box, 22-electric spark source, 220-main control circuit board, 221-IGBT thyristor, 222-switch trigger, 223-discharge switch, 224-discharge electrode, 225-energy storage capacitor, 226-transformer, 227-AD/DC converter, 228-resonance circuit, 229-filter capacitor, 23-multichannel data acquisition electronic cabin, 3-photoelectric composite dragging cable, 41-main body frame, 42-empennage guiding cover, 43-balance.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing an offshore bottom hydrate detection system, through setting up the data acquisition unit, electric spark source and the multichannel data acquisition electronic cabin of deep-dragging part, can survey offshore bottom information in offshore bottom position, reduce the Fresnel radius of target layer department; the noise of the offshore environment is low, and the signal to noise ratio can be improved; and then set up the comprehensive monitoring host computer through the shipborne part, can confirm the offshore situation accurately, improve the resolution ratio to the survey of the mineral distribution of hydration.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the offshore hydrate detection system of the present invention comprises a shipborne part 1 and a deep towing part 2; the shipborne part 1 and the deep towing part 2 are connected through a photoelectric composite towing cable 3 to carry out information interaction.
The shipborne part 1 comprises a comprehensive monitoring host 11, a GPS navigation unit 12, an ultra-short baseline positioning unit 13, a storage unit 14 and a display array 15. The GPS navigation unit 12, the ultra-short baseline positioning unit 13, the storage unit 14, and the display array 15 are respectively connected to the integrated monitoring host 11. The monitoring host 11 is used for sending out a trigger acquisition pulse signal and transmitting the trigger acquisition pulse signal to the deep dragging part 2; and receiving the offshore floor information collected by the deep towed part 3 and determining the offshore floor condition according to the offshore floor information.
The deep-drawing part 2 comprises a data acquisition unit 21, an electric spark source 22 and a multi-channel data acquisition electronic cabin 23, wherein the data acquisition unit 21 acquires information of the offshore bottom at the current position according to a trigger acquisition pulse signal; the electric spark vibration source 22 generates an electric spark vibration signal according to the trigger acquisition pulse signal to vibrate the seawater; the multi-channel data acquisition electronic cabin 23 is respectively connected with the comprehensive monitoring host 11, the data acquisition unit 21 and the electric spark source 22, and transmits a trigger acquisition pulse signal to the electric spark source 22 and the data acquisition unit 21; and transmits the offshore information collected by the data collection unit 21 to the integrated monitoring host 11.
The data acquisition unit 21 includes a digital receiving cable, a transponder, an attitude sensor, a depth measurer, and a height measurer, and the digital receiving cable, the transponder, the attitude sensor, the depth measurer, and the height measurer are respectively connected to the multi-channel data acquisition electronic cabin 23. After the seawater is vibrated, the digital receiving cable receives reflection information of the offshore stratum and sends the reflection information to the multi-channel data acquisition electronic cabin; the transponder determines the current position information close to the sea bottom and sends the current position information to the multi-channel data acquisition electronic cabin; the attitude sensor detects the current three-dimensional motion attitude of the digital receiving cable and sends the attitude to the multi-channel data acquisition electronic cabin; the depth measurer measures the depth of the digital receiving cable penetrating into the near seabed and sends the depth to the multi-channel data acquisition electronic cabin; the height measurer measures the linear length of the digital receiving cable and sends the linear length to the multi-channel data acquisition electronic cabin; the multi-channel data acquisition electronic cabin is also used for arranging and sorting the reflection information, the position information, the depth and the straight line length and converting the reflection information, the position information, the depth and the straight line length into optical signals. Further, the deep-drawing part 2 further comprises a photoelectric composite connector 212, which is arranged between the multi-channel data acquisition electronic cabin 23 and the digital receiving cable. In this embodiment, the transponder is a USBL transponder.
Specifically, the main interfaces arranged on the multi-channel data acquisition electronic cabin 23 include 5 serial ports 232, a connection USBL responder, a connection height measurer, a connection depth measurer, 2 reserved inside, and an optical fiber hybrid interface, and are connected with the electrical junction connection box 213, and used for supplying power, controlling the electric spark source 22, communicating, and the like. The photoelectric composite connector 212 is connected with a digital receiving cable, comprises two pairs of LVDS6 twisted-pair wires, two power lines, two ground lines and two waterfowl lines, completes the centralized power supply of the acquisition unit, sends commands and receives acquired data, and the transmission mode of the data and the commands is a long-distance customized protocol LVDS.
The comprehensive monitoring host receives multi-channel seismic data (namely reflected wave information), attitude data, height data and depth data uploaded by the deep-towed part; distributing the multi-channel seismic data to a storage unit 14 and a display array 15, and respectively carrying out data real-time processing and display on the storage unit and the display array; and distributing the attitude data to a position attitude inversion unit (not shown in the figure), resolving and obtaining the attitude of the carrier through the position attitude inversion unit, and further simulating and drawing the running state of the streamer in the three-dimensional direction. That is to say, the comprehensive monitoring host receives the depth of the digital receiving cable, the linear length of the digital receiving cable, the distance between the acquisition units of the digital receiving cable, the offset degree of the digital receiving cable relative to the track of the tugboat and the like at the same time besides receiving and acquiring effective data.
Specifically, the digital receiving cable comprises a towrope body, a hydrophone array, a filter amplifier and an A/D conversion module. Wherein the hydrophone arrays are equidistantly arranged within the streamer body for receiving reflected waves from the offshore floor formation; the filter amplifier is connected with the hydrophone array and is used for filtering and amplifying the reflected wave; the A/D conversion module is respectively connected with the filter amplifier and the multi-channel data acquisition electronic cabin and is used for converting analog signals of reflected waves processed by the filter amplifier into digital signals and sending the digital signals to the multi-channel data acquisition electronic cabin. Preferably, the arrangement interval of the hydrophone array is 50m, three sections are arranged, and the total length is 150 m. The hydrophone array is 5 per channel, and the AD conversion module is 32 bits.
In addition, the digital receiving cable further comprises an array spacing monitoring module, an array depth control module and a data transmission node module. The array spacing monitoring module is used for monitoring the array spacing of the hydrophone array and sending the array spacing to the multi-channel data acquisition electronic cabin, so that the multi-channel data acquisition electronic cabin can arrange according to the monitored hydrophone array; the array depth control module is used for controlling the arrangement depth of the hydrophone array; the data transmission node module comprises a plurality of transmission nodes, and each transmission node correspondingly transmits a group of data.
In practical marine environments, there are various disturbances, and the streamer body often deviates from the expected depth and horizontal position due to its own buoyancy, sea surface waves, currents, etc., and such deviation degrades the quality of data acquired by the seafloor high-resolution seismic exploration system. And when the streamer operates near the offshore area with the depth of about 2000m, sea wave has small influence on the streamer, but the influence of the self-negative buoyancy and the transverse sea current of the streamer on the streamer attitude is serious. In order to improve the detection resolution, the digital receiving cable further comprises a detection module which is embedded into the streamer body, measures the attitude of the digital receiving cable, and corrects the acquired seismic data by using the attitude information in the subsequent seismic data processing, so that the quality of the seismic section data is improved.
Further, the electric spark source comprises a control module, a discharging module, an energy storage module and a charging module; the control module and the multi-channel data acquisition electronic cabin are used for outputting a vibration control signal according to the trigger acquisition pulse signal; the discharging module is connected with the control module and used for discharging under the control of the vibration control signal to generate an electric spark vibration signal; the energy storage module is connected with the discharging module and used for providing discharging energy for the discharging module; the charging module is connected with the energy storage module and used for charging the energy storage module.
The electric spark seismic source works under the condition of high hydrostatic pressure. In this embodiment, the energy of the electric spark source is 2000 joules. Specifically, the 2000-joule electric spark seismic source is used for high-precision data acquisition control, real-time high-speed transmission and monitoring test, and has an auxiliary peripheral intelligent support function, a transmission communication function, easy software maintenance, function expansion and version upgrading. The monitoring test comprises system test software, fault diagnosis software, hydrophone full-performance analysis software and the like.
As shown in fig. 2, the control module includes a main control circuit board 220 and an IGBT thyristor 221, the IGBT thyristor 221 is turned on after receiving the trigger acquisition pulse signal, and the main control circuit board 220 starts to operate. The discharge module includes a switch trigger 222, a discharge switch 223 and a discharge electrode 224, under the control of the main control circuit board 220, the switch trigger 222 triggers, the discharge switch 223 closes, and the discharge electrode 224 starts to discharge. The charging module comprises a transformer 226, an AD/DC converter 227, a resonant circuit 228 and a filter capacitor 229, an external power supply provides an alternating voltage through the transformer 226, the alternating voltage is subjected to alternating current and direct current conversion through the AD/DC converter 227 to obtain a direct current voltage, and further, interference signals are eliminated through the resonant circuit 228 and the filter capacitor 229, so that the direct current voltage is input to the energy storage module for charging. In this embodiment, the energy storage module may be an energy storage capacitor 225.
Preferably, the utility model discloses coastal waters bottom hydrate detection system still includes the towed body, be fixed with on the towed body drag the part deeply. Specifically, the towed body comprises a main body frame 41, a flow guide cover 42 and a balance tail wing 43; the air guide sleeve 42 is arranged at the head end of the main body frame 41, the electric spark source 22 is arranged in the main body frame, and balancing tail wings 43 are arranged on two sides of the tail of the main body frame 42; the data acquisition unit 21, specifically a depth measurer and a height measurer 211, is arranged inside the air guide sleeve 42; the main body frame is fixedly provided with a USBL responder; and the tail part of the main body frame is provided with a wiring port of a data acquisition unit 23. The main frame 41 is made of a stainless steel plate and a bar material, so that the main frame has good machining process performance on the basis of ensuring sufficient rigidity and corrosion resistance.
The mop body is designed to be semi-open, and is permeable up and down, so that the stability of the distribution and recovery process of the mop body is improved.
Further, the utility model discloses design auxiliary stay frame on main body frame basis, fix on main body frame for carry out auxiliary stay to the equipment that drags the body and carry on, for drag transportation, equipment carry on etc. provide multiple possibility. The deep towed body positioning system is based on an ultra-short baseline, a height measurer and a depth measurer, equipment is fixed on a main body frame of the towed body, relevant weak current signals are transmitted to a data processing unit on the towed body, and finally the weak current signals are uniformly transmitted to a shipborne part.
During actual work, the system adopts the combination modes of ship-based GPS, ship-based electronic compass, sonar secondary positioning, towing cable node attitude detection, depth sensor matching and the like to jointly complete accurate positioning of towing cable depth and operation attitude for the position of the towing cable body.
The utility model discloses coastal waters base hydrate detection system is for tradition sea pull-type seismic exploration system, and coastal waters base detection system more is close to the target layer, can reduce target layer department fresnel radius, improves submarine stratum detection's resolution ratio by a wide margin, especially transverse resolution, and coastal waters base environmental noise is low moreover, has improved the SNR, can more effectual meticulous depicting hydrate ore body distribution.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. An offshore bottom hydrate detection system, characterized in that the detection system comprises a shipborne part and a deep towed part; wherein,
the on-board portion includes: the comprehensive monitoring host is used for sending out a trigger acquisition pulse signal and transmitting the trigger acquisition pulse signal to the deep dragging part; receiving offshore bottom information acquired by the deep-towed part, and determining the offshore bottom condition according to the offshore bottom information;
the deep-towed section includes:
the data acquisition unit is used for acquiring the offshore bottom information at the current position according to the trigger acquisition pulse signal;
the electric spark vibration source is used for generating an electric spark vibration signal according to the trigger acquisition pulse signal so as to vibrate the seawater;
the multi-channel data acquisition electronic cabin is respectively connected with the comprehensive monitoring host, the data acquisition unit and the electric spark source and is used for transmitting a trigger acquisition pulse signal to the electric spark source and the data acquisition unit; and transmitting the offshore information acquired by the data acquisition unit to the integrated monitoring host.
2. The offshore subsurface hydrate detection system of claim 1, wherein the electrical spark source comprises:
the control module is connected with the multi-channel data acquisition electronic cabin and used for outputting a vibration control signal according to the trigger acquisition pulse signal;
the discharging module is connected with the control module and used for discharging under the control of the vibration control signal to generate an electric spark vibration signal;
and the energy storage module is connected with the discharging module and used for providing discharging energy for the discharging module.
3. The offshore subsurface hydrate detection system of claim 2, wherein the electrical spark source further comprises:
and the charging module is connected with the energy storage module and is used for charging the energy storage module.
4. The offshore bottom hydrate detection system of claim 1, wherein the data acquisition unit comprises:
the digital receiving cable is connected with the multi-channel data acquisition electronic cabin and used for receiving the reflection information of the near-seabed stratum after the seawater is vibrated and sending the reflection information to the multi-channel data acquisition electronic cabin;
the responder is connected with the multi-channel data acquisition electronic cabin and used for determining the current position information close to the seabed and sending the position information to the multi-channel data acquisition electronic cabin;
the attitude sensor is connected with the multi-channel data acquisition electronic cabin and used for detecting the current three-dimensional motion attitude of the digital receiving cable and sending the attitude to the multi-channel data acquisition electronic cabin;
the depth measurer is connected with the multi-channel data acquisition electronic cabin, is used for measuring the depth of the digital receiving cable penetrating into the near seabed, and sends the depth to the multi-channel data acquisition electronic cabin;
the height measurer is connected with the multi-channel data acquisition electronic cabin, is used for measuring the linear length of the digital receiving cable, and sends the linear length to the multi-channel data acquisition electronic cabin;
the multi-channel data acquisition electronic cabin is also used for arranging and sorting the reflection information, the position information, the depth and the straight line length and converting the reflection information, the position information, the depth and the straight line length into optical signals.
5. The offshore bottom hydrate detection system of claim 4, wherein the deep towed section further comprises:
and the photoelectric composite connector is arranged between the multi-channel data acquisition electronic cabin and the digital receiving cable.
6. The offshore bottom hydrate detection system of claim 4, wherein the digital receiving cable comprises:
a streamer body;
a hydrophone array, equally spaced within the streamer body, for receiving reflected waves from the offshore floor formation;
the filter amplifier is connected with the hydrophone array and used for filtering and amplifying the reflected wave;
and the A/D conversion module is respectively connected with the filter amplifier and the multi-channel data acquisition electronic cabin and is used for converting the analog signals of the reflected waves processed by the filter amplifier into digital signals and sending the digital signals to the multi-channel data acquisition electronic cabin.
7. The offshore bottom hydrate detection system of claim 6, wherein the hydrophone array is arranged at a pitch of 50 m.
8. The offshore bottom hydrate detection system of claim 1, further comprising a towed body to which the deep towed portion is secured;
the towed body comprises a main body frame, a flow guide cover and a balance tail wing;
the head end of the main body frame is provided with the air guide sleeve, the electric spark source is arranged inside the main body frame, and two sides of the tail of the main body frame are provided with balance tail wings;
the inside of kuppe is provided with the data acquisition unit.
9. The offshore bottom hydrate detection system of claim 1, wherein the onboard portion further comprises: the GPS navigation unit, the ultra-short baseline positioning unit, the storage unit and the display array are respectively connected with the comprehensive monitoring host.
10. Offshore bottom hydrate detection system according to any of the claims 1-9, wherein the detection system further comprises:
and the photoelectric composite towing cable is arranged between the comprehensive monitoring host and the data acquisition unit and is used for information interaction.
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| CN201720554957.XU CN207096467U (en) | 2017-05-18 | 2017-05-18 | A kind of near Sea Bottom hydrate detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108609136A (en) * | 2018-04-25 | 2018-10-02 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of continuous motor driven hydro section detection sampler can be applied to complicated marine site |
| CN109239782A (en) * | 2018-08-30 | 2019-01-18 | 广州海洋地质调查局 | A kind of fine seismic prospecting system and method for gas hydrates |
-
2017
- 2017-05-18 CN CN201720554957.XU patent/CN207096467U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108609136A (en) * | 2018-04-25 | 2018-10-02 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of continuous motor driven hydro section detection sampler can be applied to complicated marine site |
| CN109239782A (en) * | 2018-08-30 | 2019-01-18 | 广州海洋地质调查局 | A kind of fine seismic prospecting system and method for gas hydrates |
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