CN108983294A - A kind of submarine seismograph electromagnetic release device and submarine seismograph - Google Patents
A kind of submarine seismograph electromagnetic release device and submarine seismograph Download PDFInfo
- Publication number
- CN108983294A CN108983294A CN201810649867.8A CN201810649867A CN108983294A CN 108983294 A CN108983294 A CN 108983294A CN 201810649867 A CN201810649867 A CN 201810649867A CN 108983294 A CN108983294 A CN 108983294A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic
- submarine seismograph
- release device
- iron core
- armature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
- G01V1/3843—Deployment of seismic devices, e.g. of streamers
- G01V1/3852—Deployment of seismic devices, e.g. of streamers to the seabed
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Oceanography (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (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 present invention relates to seismic detector technical field, a kind of submarine seismograph electromagnetic release device and submarine seismograph are disclosed.Submarine seismograph electromagnetic release device, comprising: electromagnetic releaser is fixed on seismic detector, and the electromagnetic releaser includes iron core, and the side of the iron core is equipped with copper coil, and the iron core is equipped with the watertight connector for copper coil to be connect with seismic detector controller；Armature is fixed in seismometer module, and the armature matches connection with the electromagnetic releaser.Submarine seismograph includes above-mentioned submarine seismograph electromagnetic release device.Submarine seismograph electromagnetic release device and submarine seismograph provided by the invention discharge seismometer module in a short time, seismometer module smoothly and are preferably coupled with seabed plane.
Description
Technical field
The present invention relates to seismic detector technical field more particularly to a kind of submarine seismograph electromagnetic release device and seabed
Shake instrument.
Background technique
Submarine seismograph is the instrument for needing to work in seabed, and each component needs to resist huge seawater pressure, while
Resist the corrosion of seawater.During submarine seismograph sinks in the seawater, generally for avoiding seismometer module from individually holding
By huge shock, can bottom out and then individually discharge seismometer module in submarine seismograph, make seismometer module effectively with
The coupling of seabed plane, and the relieving mechanism for discharging seismometer module generallys use Fuse Type release device, that is, passes through electrochemistry
Mode fuses for fixing the steel wire of seismometer module, to realize release seismometer module, the fusing process of steel wire needs 10-
15min, release time is long, it cannot be guaranteed that seismometer module can be coupled smoothly with seabed plane.
Summary of the invention
The purpose of the present invention is to provide a kind of submarine seismograph electromagnetic release device and submarine seismographs, in the short time
Interior release seismometer module, enables seismometer module smoothly and preferably to couple with seabed plane.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of submarine seismograph electromagnetic release device, comprising:
Electromagnetic releaser is fixed on seismic detector, and the electromagnetic releaser includes iron core, and the side of the iron core is equipped with copper
Coil, the iron core are equipped with the watertight connector for copper coil to be connect with seismic detector controller；
Armature is fixed in seismometer module, and the armature matches connection with the electromagnetic releaser.
As optimal technical scheme, the side of the iron core is provided with annular groove, and it is recessed that the copper coil is placed in the annular
In slot, and the copper coil is wound in the small circular side wall of the annular groove diameter.
As optimal technical scheme, it is filled between the big circular side wall of the diameter of the copper coil and the annular groove
Epoxide-resin glue.
As optimal technical scheme, the material of the iron core and the armature is electrical pure iron.
As optimal technical scheme, the side wall of the iron core offers the threaded hole for installing the watertight connector, institute
The junction for stating watertight connector and the iron core is equipped with sealing ring.
As optimal technical scheme, the material of the watertight connector is copper or stainless steel or titanium alloy.
As optimal technical scheme, the electromagnetic releaser with a thickness of 25-40mm.
As optimal technical scheme, the edge of the armature is equipped at intervals with multiple protrusions, the electromagnetic releaser with it is described
When armature connects, the electromagnetic releaser is placed in the space inner that multiple protrusions are surrounded with the armature.
As optimal technical scheme, the lateral wall of the iron core and the armature is coated with erosion resistant coating.
The present invention also provides a kind of submarine seismographs, including above-mentioned submarine seismograph electromagnetic release device.
Beneficial effects of the present invention: submarine seismograph of the present invention is used for electromagnetic release device by seismometer module
It is discharged into seabed plane from seismic detector, is cooperated using electromagnetic releaser and armature, electromagnetic releaser power-off can make armature de-
From electromagnetic releaser, and then seismometer module is discharged, shorten the time of seismometer module release, keeps seismometer module steady
And preferably coupled with seabed plane, the measurement accuracy of seismometer module is improved, seismographic reliability and data are improved
The quality of record.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that seismometer module is connect with submarine seismograph described in the embodiment of the present invention；
Fig. 2 is electromagnetic releaser schematic perspective view described in the embodiment of the present invention；
Fig. 3 is electromagnetic releaser sectional view described in the embodiment of the present invention；
Fig. 4 is armature structure schematic diagram described in the embodiment of the present invention；
Fig. 5 is armature described in the embodiment of the present invention and seismometer module connection structure schematic diagram.
In figure:
1, electromagnetic releaser；11, iron core；12, copper coil；13, watertight connector；14, sealing ring；15, the first mounting hole；
2, armature；21, raised；22, the second mounting hole；
3, seismic detector；
4, seismometer module.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.It is understood that
It is that specific embodiment described herein is used only for explaining the present invention rather than limiting the invention.It further needs exist for illustrating
, only the parts related to the present invention are shown for ease of description, in attached drawing and it is not all.
As shown in Figs. 1-5, a kind of submarine seismograph electromagnetic release device is present embodiments provided, for discharging seismometer
Module 4, but it is not limited to release seismometer module 4, it can be also used for the clump weight on release seismic detector 3.
The submarine seismograph electromagnetic release device includes electromagnetic releaser 1 and armature 2.The electromagnetic releaser 1 is solid
It is scheduled on seismic detector 3, the electromagnetic releaser 1 includes iron core 11, and the side of the iron core 11 is equipped with copper coil 12, the iron core
11 are equipped with the watertight connector 13 for copper coil 12 to be connect with seismic detector controller；The armature 2 is fixed on seismometer mould
On block 4, the armature 2 matches connection with the electromagnetic releaser 1.
In the present embodiment, iron core 11 is cylinder, and the armature 2 of matched connection is circular pan-like structure.Iron core 11
It may be set to be other shapes with armature 2, no longer describe herein.
Specifically, as shown in Fig. 2, the one side of iron core 11 is provided with annular groove, copper coil 12 is equipped in annular groove, and
Copper coil 12 is tightly wound around on the small side wall of diameter of annular groove, and the number of turns of the copper coil 12 of winding is more, corresponding to produce
Raw electromagnetic attraction is bigger.In order to make electromagnetic releaser 1 become the entirety of a solid core, in the straight of copper coil 12 and annular groove
It is filled with epoxide-resin glue between the big side wall of diameter, realizes the sealing of copper coil 12 in water, to realize that electromagnetic releasing fills
Set actuation and release in deep water or even seawater.The thickness of electromagnetic releaser 1 is set as 25-40mm, preferably 30mm simultaneously, electricity
Magnetic release 1 can resist the pressure more than 6000 meters of depth of water.It is filled out between the big side wall of the diameter of copper coil 12 and annular groove
The epoxide-resin glue filled can be replaced realizing electromagnetic releaser integral structure by other rubber, no longer be described herein.
As shown in Figures 2 and 3, threaded hole is opened up on the side wall of iron core 11, watertight connector 13 is threadedly connected to threaded hole
Interior, watertight connector 13 is equipped with the electric wire of connection copper coil 12 and seismic detector controller.The material of watertight connector 13 can for copper,
Stainless steel or titanium alloy, preferably metallic copper improve the corrosion resistance of watertight connector 13.As shown in figure 3, in the outside of iron core 11
The junction of wall and watertight connector 13 and iron core 11 is equipped with sealing ring 14, the preferred O-ring seal of sealing ring 14.Sealing ring 14 is set
It sets the inside for making iron core 11 and external environment completely cuts off, prevent from being corroded inside iron core 11.
As shown in figure 3, opening up the first mounting hole 15 in the middle part of the one end of iron core 11 far from copper coil 12, pass through bolt and
Iron core 11 is mounted on seismic detector 3 by the mating connection of one mounting hole 15.
As shown in figure 4, in the present embodiment, armature 2 is circular pan-like structure, at the edge interval of armature 2, setting is multiple
Protrusion 21, in 1 adhesive armature 2 of electromagnetic releaser, electromagnetic releaser 1 is placed in the space that multiple raised 21 surround with armature 2
Side can effectively prevent that opposite sliding occurs between armature 2 and electromagnetic releaser 1, be attracted so as to avoid electromagnetic releaser 1
It is skidded off when armature 2 from side and leads to be attracted object landing, improve the integrally-built reliability of seismic detector 3.
Multiple second mounting holes 22 are also provided on armature 2, in the present embodiment, the second mounting hole 22 offers three
A, the second mounting hole 22 is for connecting seismometer module 4.As shown in figure 5, armature 2 is mounted on seismometer module 4 by bolt
On.Copper coil 12 in electromagnetic releaser 1 is powered, and 1 adhesive armature 2 of electromagnetic releaser realizes seismometer module 4 and seismic detector 3
Connection；Copper coil 12 in electromagnetic releaser 1 powers off, and electromagnetic releaser 1 discharges armature 2, seismometer module 4 be released and with
The coupling of seabed plane.
In the present embodiment, the material of iron core 11 and armature 2 is electrical pure iron, and the magnetic property of electrical pure iron is good.For
It prevents iron core 11 and armature 2 to be corroded, in the lateral wall of iron core 11 and armature 2 is coated with erosion resistant coating.
Electromagnetic release device described in the present embodiment is mounted on seismic detector 3, sinks down into a few km depth of waters in seismic detector 3
When seabed, the power on/off of the device is controlled by seismic detector controller, controls its actuation and release to armature 2 to realize,
And then release of the realization to seismometer module 4, after seismic detector 3 can be made to reach seabed, seismometer module 4 individually discharges, more
Add and steadily, reliably coupled with seabed plane, promotes the reliability of instrument and the accuracy of data record.Simultaneously by fixation
The design of the structure of armature 2 on releasing object effectively prevents electromagnetic releaser 1 in attracting process, due to accident
It is skidded off from side and leads to be attracted the phenomenon that object slides, increase the reliability of seismic detector 3.
The present embodiment additionally provides a kind of submarine seismograph, including above-mentioned submarine seismograph electromagnetic release device.
Obviously, the above embodiment of the present invention is just for the sake of clearly illustrating examples made by the present invention, and being not is pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
1. a kind of submarine seismograph electromagnetic release device characterized by comprising
Electromagnetic releaser (1) is fixed on seismic detector (3), and the electromagnetic releaser (1) includes iron core (11), the iron core
(11) side is equipped with copper coil (12), and the iron core (11) is equipped with for copper coil (12) to be connect with seismic detector controller
Watertight connector (13)；
Armature (2) is fixed on seismometer module (4), and the armature (2) matches connection with the electromagnetic releaser (1).
2. submarine seismograph electromagnetic release device according to claim 1, which is characterized in that the one of the iron core (11)
Side is provided with annular groove, and the copper coil (12) is placed in the annular groove, and the copper coil (12) is wound in the ring
In the small circular side wall of connected in star diameter.
3. submarine seismograph electromagnetic release device according to claim 2, which is characterized in that the copper coil (12) with
Epoxide-resin glue is filled between the big circular side wall of the diameter of the annular groove.
4. submarine seismograph electromagnetic release device according to claim 1, which is characterized in that the iron core (11) and institute
The material for stating armature (2) is electrical pure iron.
5. submarine seismograph electromagnetic release device according to claim 1, which is characterized in that the side of the iron core (11)
Wall offers the threaded hole for installing the watertight connector (13), the connection of the watertight connector (13) and the iron core (11)
Place is equipped with sealing ring (14).
6. submarine seismograph electromagnetic release device according to claim 1, which is characterized in that the watertight connector (13)
Material be copper or stainless steel or titanium alloy.
7. submarine seismograph electromagnetic release device according to claim 1, which is characterized in that the electromagnetic releaser
(1) with a thickness of 25-40mm.
8. submarine seismograph electromagnetic release device according to claim 1, which is characterized in that the side of the armature (2)
Edge is equipped at intervals with multiple raised (21), when the electromagnetic releaser (1) connect with the armature (2), the electromagnetic releaser (1)
It is placed in the space inner that multiple raised (21) and the armature (2) surround.
9. submarine seismograph electromagnetic release device according to claim 1, which is characterized in that the iron core (11) and institute
The lateral wall for stating armature (2) is coated with erosion resistant coating.
10. a kind of submarine seismograph, which is characterized in that including the described in any item submarine seismograph electromagnetism of claim 1-9
Release device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810649867.8A CN108983294B (en) | 2018-06-22 | 2018-06-22 | Electromagnetic release device for submarine seismograph and submarine seismograph |
| PCT/CN2019/092242 WO2019242720A1 (en) | 2018-06-22 | 2019-06-21 | Electromagnetic release device for submarine seismograph, and submarine seismograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810649867.8A CN108983294B (en) | 2018-06-22 | 2018-06-22 | Electromagnetic release device for submarine seismograph and submarine seismograph |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108983294A true CN108983294A (en) | 2018-12-11 |
| CN108983294B CN108983294B (en) | 2023-07-28 |
Family
ID=64538054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810649867.8A Active CN108983294B (en) | 2018-06-22 | 2018-06-22 | Electromagnetic release device for submarine seismograph and submarine seismograph |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108983294B (en) |
| WO (1) | WO2019242720A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019242720A1 (en) * | 2018-06-22 | 2019-12-26 | 南方科技大学 | Electromagnetic release device for submarine seismograph, and submarine seismograph |
| CN111175811A (en) * | 2019-10-29 | 2020-05-19 | 自然资源部第二海洋研究所 | Ocean bottom seismograph equipment capable of improving signal-to-noise ratio |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112327351A (en) * | 2020-07-08 | 2021-02-05 | 中国地震台网中心 | Seismometer anti-vibration device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH168515A (en) * | 1933-06-29 | 1934-04-15 | Sulzer Ag | Device for the automatic regulation of the liquid level in the diving bell of an underwater motor. |
| JP2002061414A (en) * | 1998-01-06 | 2002-02-28 | Jiro Kitamura | Base isolation device, sliding bearing, and base isolation structure |
| CN101672927A (en) * | 2009-09-25 | 2010-03-17 | 北京港震机电技术有限公司 | Broadband ocean bottom seismograph |
| CN201654246U (en) * | 2010-04-23 | 2010-11-24 | 北京港震机电技术有限公司 | Short cycle submarine seismograph |
| CN103576184A (en) * | 2013-10-11 | 2014-02-12 | 赵明 | Impact type earthquake wave generator |
| CN103612730A (en) * | 2013-11-22 | 2014-03-05 | 华中科技大学 | Underwater automatic releasing device |
| CN106167079A (en) * | 2016-08-11 | 2016-11-30 | 浙江大学 | A kind of underground releaser for deep-sea Autonomous Underwater Vehicle |
| CN206696445U (en) * | 2017-04-14 | 2017-12-01 | 青岛海洋地质研究所 | The stable release of submarine seismograph |
| CN207173929U (en) * | 2017-09-12 | 2018-04-03 | 中国地质大学（北京） | One kind is without sealed electromagnetic iron acoustics release control circuit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2128350C1 (en) * | 1997-12-31 | 1999-03-27 | Бахарев Сергей Алексеевич | Underwater acoustic device for remote disconnection of underwater article and marking its location |
| CN106197384B (en) * | 2016-07-20 | 2018-05-08 | 浙江大学 | It is a kind of to sit bottom device for the releasable of profiler |
| CN108594291B (en) * | 2018-06-22 | 2023-08-22 | 南方科技大学 | Submarine seismograph |
| CN108983294B (en) * | 2018-06-22 | 2023-07-28 | 南方科技大学 | Electromagnetic release device for submarine seismograph and submarine seismograph |
-
2018
- 2018-06-22 CN CN201810649867.8A patent/CN108983294B/en active Active
-
2019
- 2019-06-21 WO PCT/CN2019/092242 patent/WO2019242720A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH168515A (en) * | 1933-06-29 | 1934-04-15 | Sulzer Ag | Device for the automatic regulation of the liquid level in the diving bell of an underwater motor. |
| JP2002061414A (en) * | 1998-01-06 | 2002-02-28 | Jiro Kitamura | Base isolation device, sliding bearing, and base isolation structure |
| CN101672927A (en) * | 2009-09-25 | 2010-03-17 | 北京港震机电技术有限公司 | Broadband ocean bottom seismograph |
| CN201654246U (en) * | 2010-04-23 | 2010-11-24 | 北京港震机电技术有限公司 | Short cycle submarine seismograph |
| CN103576184A (en) * | 2013-10-11 | 2014-02-12 | 赵明 | Impact type earthquake wave generator |
| CN103612730A (en) * | 2013-11-22 | 2014-03-05 | 华中科技大学 | Underwater automatic releasing device |
| CN106167079A (en) * | 2016-08-11 | 2016-11-30 | 浙江大学 | A kind of underground releaser for deep-sea Autonomous Underwater Vehicle |
| CN206696445U (en) * | 2017-04-14 | 2017-12-01 | 青岛海洋地质研究所 | The stable release of submarine seismograph |
| CN207173929U (en) * | 2017-09-12 | 2018-04-03 | 中国地质大学（北京） | One kind is without sealed electromagnetic iron acoustics release control circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019242720A1 (en) * | 2018-06-22 | 2019-12-26 | 南方科技大学 | Electromagnetic release device for submarine seismograph, and submarine seismograph |
| CN111175811A (en) * | 2019-10-29 | 2020-05-19 | 自然资源部第二海洋研究所 | Ocean bottom seismograph equipment capable of improving signal-to-noise ratio |
| CN111175811B (en) * | 2019-10-29 | 2022-03-15 | 自然资源部第二海洋研究所 | Ocean bottom seismograph equipment capable of improving signal-to-noise ratio |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019242720A1 (en) | 2019-12-26 |
| CN108983294B (en) | 2023-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108983294A (en) | A kind of submarine seismograph electromagnetic release device and submarine seismograph | |
| RU2604102C2 (en) | Sonde with integral pressure sensor and method | |
| EP3172790B1 (en) | Inductive power for seismic sensor node | |
| US20140174171A1 (en) | Portable self powered line mountable device for measuring and transmitting rainfall measurements | |
| EP3101449A1 (en) | Flat contact quick connect connection for an autonomous seismic node | |
| BR112012028017B1 (en) | SEISMIC CABLE RECORDING DEVICE IN THE OCEAN BACKGROUND, SEASONAL CABLE RECORDING DEVICE METHOD IN THE OCEAN BACKGROUND AND SEASONAL CABLE RECORDING METHOD IN THE OCEAN BACKGROUND | |
| US20080080318A1 (en) | Autonomous ocean bottom seismic node recording device | |
| MX2012007920A (en) | Ultrasonic flow meter and transducer assembly with isolated transformer capsule. | |
| ES2785604T3 (en) | Pressure vessel penetration element isolation device | |
| JP5218630B2 (en) | Radio wave receiving device and method of manufacturing radio wave receiving device | |
| EP3164738A2 (en) | Simultaneous charging of a plurality of autonomous seismic nodes | |
| CN208297752U (en) | A kind of submarine seismograph electromagnetic release device and submarine seismograph | |
| US20190334380A1 (en) | Electric power transmission device | |
| EP3069111A1 (en) | Radar level gauge system and reflector arrangement | |
| CN104149950B (en) | A kind of watertight joint sealing of acquisition system under water | |
| RU2563975C1 (en) | Electrically-insulating device for attachment of blanket module on vacuum housing of fusion-type reactor | |
| CN105514656B (en) | One kind shielding is without magnetic high-density probe array connector | |
| CN105334408B (en) | A kind of device of autonomous detection deep-sea watertight performance of connector | |
| CN116002025A (en) | Corrosion-resistant electromagnetic chuck device of full sea deep oil charge formula | |
| CN109471221A (en) | Round fiber electric connector | |
| CN201934676U (en) | Light residual-magnetism-preventive direct-acting electromagnetic valve | |
| KR101277850B1 (en) | A socket for a fish-luring light | |
| JP6497813B2 (en) | Underwater contactless power feeder | |
| RU2708377C1 (en) | Magnetic-mechanical device for connection of modular structures | |
| KR20190131256A (en) | Temporary Install Apparatus of Metallic Conductors for Anti-Corrosion in Ship |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20181211 Assignee: Shenzhen Heman Marine Technology Co.,Ltd. Assignor: SOUTH University OF SCIENCE AND TECHNOLOGY OF CHINA Contract record no.: X2021990000518 Denomination of invention: An electromagnetic release device for seabed seismograph and seabed seismograph License type: Exclusive License Record date: 20210823 |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |