CN210608485U - Underwater wireless communication device - Google Patents
Underwater wireless communication device Download PDFInfo
- Publication number
- CN210608485U CN210608485U CN201921001318.6U CN201921001318U CN210608485U CN 210608485 U CN210608485 U CN 210608485U CN 201921001318 U CN201921001318 U CN 201921001318U CN 210608485 U CN210608485 U CN 210608485U
- Authority
- CN
- China
- Prior art keywords
- base
- wireless communication
- communication device
- underwater
- transceiver
- 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.)
- Expired - Fee Related
Links
- 238000004891 communication Methods 0.000 title claims abstract description 92
- 239000011241 protective layer Substances 0.000 claims abstract description 12
- 230000003139 buffering effect Effects 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 239000004575 stone Substances 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000001788 irregular Effects 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 9
- 239000013535 sea water Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 238000012876 topography Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000257465 Echinoidea Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model provides an underwater wireless communication device, include: the cable duct comprises a base, a cable duct and a transceiver, wherein the transceiver is wrapped with a protective layer. The utility model discloses technical scheme's base can set up the bottom at rivers, lakes and seas, for example, the base can adopt the heavier material of weight, for example metal or stone mound etc, guarantee that wireless communication device sets up behind the bottom under water, can not shift etc. easily, and simultaneously, in order to prevent submarine biological attack or mistake, wireless communication device has the protective layer with transceiver parcel under water, for example, have the structure of spine, perhaps can set to irregular structure, therefore, through above design, be fixed in behind the bottom of the water at the base, regard as power transmission part through cable duct, provide the power for the transceiver, guarantee whole wireless communication device's under water normal operating, and simultaneously, there is the protective layer through transceiver parcel, prevent that submarine biological mistake from eating wireless communication device under water.
Description
Technical Field
The utility model relates to the field of communication technology, in particular to wireless communication device under water.
Background
The underwater communication technology is a bottleneck for restricting the development of underwater detection and underwater communication network systems. Water, which is a dielectric medium, allows high-frequency electromagnetic wave signals to be rapidly attenuated under water due to a "shielding effect" and "eddy current loss", so that propagation of high-frequency electromagnetic waves in seawater is limited and is difficult to be applied to data communication. Due to the problems of light focusing, light reflection, water turbidity and the like, the laser communication technology is difficult to be applied to underwater communication. At present, there are two relatively feasible technical development directions, namely underwater communication technology based on acoustic signals. Another ultra low frequency (ELF) communication technology, in which 7.83-56Hz low frequency waves have the following technical advantages: 1. the material has penetrability to objects; 2. travel rapidly around the earth and without attenuation; 3. has a secure transmission characteristic; 4. has no electromagnetic pollution to the environment, and is beneficial and harmless to human body.
However, the communication devices currently applied to the water bottom are easily eaten by the benthos by mistake, which causes damage to the equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an underwater wireless communication device aims at solving the technical problem that current underwater wireless communication device can't be long-term at complicated underwater environment operations such as submarine.
In order to achieve the above object, the utility model provides an underwater wireless communication device, include: a base;
the cable duct is arranged at the upper end of the base;
the transceiver is arranged at one end, far away from the base, of the cable duct, and the transceiver is wrapped with a protective layer.
Preferably, the transceiver is a sphere, the sphere is fixed at one end of the cable duct far away from the base, and the protective layer is a spine portion.
Preferably, a buffering mechanism is arranged between the cable duct and the base, and the buffering mechanism is used for buffering impact force applied to the cable duct underwater.
Preferably, the buffer gear is a universal joint, and the universal joint is arranged between the cable pipeline and the base and used for buffering impact force applied to the cable pipeline under water.
Preferably, the base is externally wrapped with a pressure-resistant sealing layer.
Preferably, the base is a pyramidal structure.
Preferably, a plurality of regions are arranged in the base, and a battery pack is arranged in the region of the base close to the bottom.
Preferably, several areas within the base are detachable structures.
The utility model discloses technical scheme's base sets up on the seabed, for example, the base can adopt the heavier material of weight, for example metal or stone mound etc, guarantee that wireless communication device sets up behind the seabed under water, can not shift easily etc, and simultaneously, in order to prevent that benthos from eating by mistake wireless communication device under water, there is the protective layer with the transceiver parcel, for example, have the structure of spine, or can set to irregular structure, therefore, through above design, after the base is fixed in on the seabed, as power transmission part through cable duct, for the transceiver provides the power, guarantee whole normal function of wireless communication device under water, and simultaneously, there is the protective layer through transceiver parcel, prevent that benthos from eating by mistake under water wireless communication device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of the underwater wireless communication device of the present invention.
The reference numbers illustrate:
reference numerals | Name (R) | Reference numerals | Name (R) |
10 | |
20 | Cable conduit |
30 | Transceiver | 31 | |
32 | |
40 | |
50 | Battery pack |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
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 efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Underwater communication is an important technology for ocean and underwater development, plays a vital role in aspects such as ocean environment monitoring, ocean military and the like, and is mainly in fresh water and seawater compared with land and space communication; the prior art can realize free communication on land and in space, but the realization of underwater free communication is difficult, underwater communication modes are divided into wired communication and wireless communication, underwater wired communication can be realized by laying submarine cables, and high-frequency electromagnetic waves have great attenuation in water, therefore, the wide-spread high-frequency electromagnetic wave communication on land is limited in underwater application, the underwater wireless communication mainly refers to underwater acoustic communication technology, which is the most mature technology of wireless communication between underwater targets at present, but the sound wave is greatly attenuated in water, the attenuation is in direct proportion to the square of the sound wave frequency, so that the underwater sound communication technology is low in propagation speed, the acoustic equipment is large in size and high in cost, the requirements on small size and low cost in underwater communication application cannot be met, and the underwater wireless communication device cannot structurally work in underwater environments such as the sea bottom and the like for a long time;
in view of this, the present invention provides an underwater wireless communication device, comprising a base 10; the cable duct 20, the cable duct 20 is arranged at the upper end of the base 10; the transceiver 30 is arranged at one end of the cable duct 20 far away from the base 10, and the transceiver 30 is wrapped with a protective layer.
It is to be understood that the underwater wireless communication device may be one of a sonar communication device, a low-frequency communication device, and the like, or may be other underwater communication equipment, and such equipment is disposed underwater. As shown in fig. 1, the underwater wireless communication device is disposed on the sea floor, and a plurality of underwater wireless communication devices communicate with each other, so that a communication network between the plurality of underwater wireless communication devices is distributed, and real-time detection or communication transmission is facilitated for the whole sea area, and therefore, it is necessary to prevent the benthonic organisms from attacking or eating the underwater wireless communication device by mistake for the underwater wireless communication device disposed in the sea floor, and therefore, in the underwater wireless communication device of the present invention, the base 10 is disposed on the sea floor, for example, the base 10 may be made of a heavy material such as metal or stone mound, or a fixing device may be disposed at the bottom of the base 10, and the base 10 is directly fixed on the rock on the sea floor, so as to ensure that the underwater wireless communication device is not easily displaced after being disposed on the sea floor, and at the same time, in order to prevent the benthonic organisms from eating the underwater wireless communication, the transceiver 30 is wrapped by the protective layer, such as a structure with spikes, or may be configured as an irregular structure, so that, by the above design, after the base 10 is fixed on the seabed, the transceiver 30 is powered by arranging a watertight cable in the cable conduit 20 as a power transmission component, thereby ensuring the normal operation of the whole underwater wireless communication device, and simultaneously, the underwater wireless communication device is prevented from being attacked or eaten by the seabed organisms through the protective layer of the transceiver 30;
as a preferable scheme, the underwater wireless communication device of the present invention employs an ultra low frequency (ELF) communication device, which employs a 7.83-56Hz low frequency wave communication signal, having various advantages, for example, having penetrability to an object; travel rapidly around the earth and without attenuation; has a secure transmission characteristic; has no electromagnetic pollution to the environment, and is beneficial and harmless to human body.
Specifically, the transceiver 30 is a sphere 31, the sphere 31 is fixed at an end of the cable duct 20 away from the base 10, and the protection layer is a spike 32. Based on the above structure, as a preferable scheme, the transceiver 30 is composed of the sphere 31 and the spine portion 32 disposed on the surface of the sphere 31, a sensor and other components are sealed in the sphere 31, the sphere 31 may be a sealed waterproof structure to ensure that seawater does not enter the sphere 31, and meanwhile, the spine portion 32 on the surface of the sphere may be fully distributed on the whole sphere 31, and the shape structure is like the shape of sea urchin, so as to effectively prevent the submarine living things from attacking or eating the underwater wireless communication device by mistake;
as a preferable scheme, the spine part 32 can effectively prevent the benthos from attacking or eating the underwater wireless communication device by mistake, and can also be used as a receiving and transmitting antenna, if the transmitting and receiving antenna is set to be spherical, the process of spherical omnidirectional transmitting and receiving signals is very power-consuming, and the signals are not transmitted far, and the sea urchin-shaped spine part 32 is used as the transmitting and receiving antenna, so that the power is very saved in the process of transmitting and receiving the signals, the energy is conveniently concentrated, and the signals are transmitted farther.
Specifically, a buffering mechanism 40 is disposed between the cable duct 20 and the base 10, and the buffering mechanism 40 is used for buffering an impact force applied to the cable duct 20 under water. Based on the above structure, the seabed environment is relatively harsh for the underwater electronic equipment, and the current change caused by storm such as dark current, tidal current and typhoon is hidden in the seabed, so in order to prevent the seabed current from damaging the underwater wireless communication device, the buffer mechanism 40 is adopted between the cable conduit 20 and the base 10 for buffering the impact force of the cable conduit 20 under the water, so as to prevent the underwater wireless communication device from being damaged;
in a most preferable scheme, the buffering mechanism 40 may be of a spring structure and is disposed between the cable duct 20 and the base 10, when a submarine current occurs, water flow generates an impact force on the cable duct 20, the impact force can be offset by the spring structure, and meanwhile, after the cable duct 20 is buffered and impacted, the cable duct 20 can be buffered to swing at multiple angles, and finally, the cable duct is reset by the spring structure, so that the operation of the whole underwater wireless communication device is not affected, and the maneuvering performance of the underwater wireless communication device is improved.
Specifically, the buffering mechanism 40 is a universal joint, and the universal joint is disposed between the cable duct 20 and the base 10 to buffer an impact force applied to the cable duct 20 under water. As preferred scheme, buffer gear 40 is preferred universal joint, when the peripheral sea area of wireless communication device takes place rivers and changes under water, this rivers change or the mobile power that the undercurrent produced passes through universal joint buffering conversion prevents that wireless communication device from suffering destruction under water.
Specifically, the base 10 is wrapped with a pressure-resistant sealing layer. Preferably, the base 10 is installed in the sea bottom for a long time, and in order to prevent the base 10 from being corroded by seawater and damaged by seawater pressure, it is preferable that the surface of the base 10 exposed to seawater is covered with a pressure-resistant sealing layer.
Specifically, the base 10 is a pyramid-shaped structure. Preferably, in order to further improve the stability of the base 10 on the seabed, the base 10 is configured as a pyramid structure, the horizontal cross-sectional area of the base 10 is gradually reduced from bottom to top, and the bottom of the base 10 may be further configured with a mounting structure, so that the base 10 can be conveniently mounted on a rugged seabed terrain through a seabed fixing device, and the stability of the underwater wireless communication device is improved.
Specifically, a plurality of regions are arranged in the base 10, and a battery pack 50 is arranged in a region of the base 10 close to the bottom. For the application of the base 10, the base 10 may be divided into a plurality of area modules, the area modules may coordinate with the pyramid structure, for example, the area modules may be distributed in a hierarchical manner, the bottom layer is a bottom area module of the pyramid structure, the battery pack 50 may be disposed in the area module, the battery pack 50 has a large weight, and the base 10 may be stably disposed on the sea floor, of course, the battery pack 50 may be an electrolysis power generation type battery pack 50 adapted to seawater, or may be of another battery type, and in addition, the base 10 itself may also be made of a material with a large mass, such as a metal material or a stone pier.
Specifically, several areas in the base 10 are detachable structures. Most preferably, the submarine topography is complex and variable, the topography is similar to the land, such as mountain, plateau, basin, hill, and other forms, for different topographic structures, the height of the base 10 is not uniform, for easy installation, several area modules of the base 10 are designed as detachable structures, so as to generate different series of the base 10 according to different submarine topography, meanwhile, for the base 10 with height requirement, the height of the base 10 can be increased by increasing the relevant area modules of the base 10, so as to adapt to different submarine topography, for example, several area modules of the base 10 are stacked by a plurality of modules with cavities inside, corresponding electronic components are arranged in the cavity of each module, and the adjacent two modules are electrically connected by plugging, still be provided with fixing device such as buckle between two adjacent modules, be convenient for fold at the multiunit module and establish the back, fix through fixing device such as buckle, be favorable to artifical maintenance in later stage and electric energy to supply.
Specifically, the number of the areas in the base 10 is three. Preferably, the base 10 may be divided into three area modules, the bottom area module of the base 10 may be set as the battery pack 50, the middle area module may be set as a power amplifier, and the topmost area module may be set as a multi-stage amplifier, for example, in low frequency communication, the battery pack 50 may provide sufficient power for the power amplifier module, and in order to make the transmission distance of the low frequency signal longer, the low frequency signal may be amplified by the multi-stage amplifier, and the requirement of the low frequency communication is sequentially satisfied.
As another example, a receiving sensor, such as a sonar sensor or a low-frequency signal sensor, and a signal transmitter are provided inside the spherical body 31. The battery pack 50 of the base 10 is used as a power carrier of the whole underwater wireless communication device, and provides power for electronic modules and the like in the whole underwater wireless communication device, the power is transmitted to a watertight cable through the microcontroller in the base 10, the ball 31 is communicated with the cable duct 20, and a receiving sensor and a signal transmitter in the ball 31 are connected with the watertight cable in the cable duct, in order to facilitate signal transmission on the seabed, a plurality of underwater wireless communication devices are distributed on the seabed of a certain sea area in a dot mode, and when a submarine or a ship sends a wireless communication signal in the sea area, for example, the signal of noise and underwater sound equipment generated by underwater targets such as ships and warships is identified by a microcontroller in the underwater wireless communication device, and then the direction of the targets is measured. Through the signal transmitter in the sphere 31 of the underwater wireless communication device, after the sphere 31 receives the wireless communication signal, the signal transmitter on the sphere 31 transmits coded address information to the next underwater wireless communication device, and the coded address information is transmitted through a plurality of underwater wireless communication devices and finally transmitted to a signal receiving station on land or on a ship, so that the positioning of suspicious targets in the sea on land, on the sea surface and in the air is realized;
as a further preferable mode, on the basis of the above-mentioned embodiment, in order to ensure that the wireless communication signal can be transmitted in a long distance under different depths of the sea, the longer the transmission distance is, the more power is required, and therefore, the power consumption is also large. In order to ensure that the power reserve of the underwater wireless communication device is suitable for the underwater complex environment, it is preferable to set a plurality of area modules in the base 10 as a detachable combination structure, especially, the area module of the battery pack 50 as a quick-release quick-assembly combination structure, so as to increase more battery packs 50, for example, the battery pack 50 is additionally installed at the bottom of the base 10, so that the number of the battery packs 50 of the base 10 is two, and the underwater wireless communication device can transmit a long-distance communication signal.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (8)
1. An underwater wireless communication device, comprising:
a base;
the cable duct is arranged on the base;
the transceiver is arranged at one end, far away from the base, of the cable duct, and the transceiver is wrapped with a protective layer.
2. The underwater wireless communication device of claim 1 wherein the transceiver is a sphere affixed to an end of the conduit remote from the base, and the protective layer is a spike.
3. The underwater wireless communication device of claim 2, wherein a buffering mechanism is disposed between the cable conduit and the base, the buffering mechanism being configured to buffer an impact force applied to the cable conduit underwater.
4. The underwater wireless communication device of claim 3, wherein the buffering mechanism is a universal joint disposed between the cable conduit and the base for buffering impact force applied to the cable conduit underwater.
5. The underwater wireless communication device of claim 1 wherein the base is externally wrapped with a pressure tight seal.
6. An underwater wireless communication device as in any of claims 1-5 wherein the base is a pyramidal structure.
7. The underwater wireless communication device of claim 6 wherein the base has a plurality of regions therein, and wherein a battery pack is disposed in a region of the base proximate the bottom.
8. An underwater wireless communication device as in claim 7 wherein the plurality of regions within the base are removable structures.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201921001318.6U CN210608485U (en) | 2019-06-28 | 2019-06-28 | Underwater wireless communication device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201921001318.6U CN210608485U (en) | 2019-06-28 | 2019-06-28 | Underwater wireless communication device |
Publications (1)
Publication Number | Publication Date |
---|---|
CN210608485U true CN210608485U (en) | 2020-05-22 |
Family
ID=70691005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201921001318.6U Expired - Fee Related CN210608485U (en) | 2019-06-28 | 2019-06-28 | Underwater wireless communication device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN210608485U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113050097A (en) * | 2021-03-26 | 2021-06-29 | 西京学院 | Seabed vacuum pipeline sonar system and working method |
-
2019
- 2019-06-28 CN CN201921001318.6U patent/CN210608485U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113050097A (en) * | 2021-03-26 | 2021-06-29 | 西京学院 | Seabed vacuum pipeline sonar system and working method |
CN113050097B (en) * | 2021-03-26 | 2024-06-07 | 西京学院 | Submarine vacuum pipeline sonar system and working method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104618032B (en) | The electromagnetic wave transmission system and method at a kind of water-air interface over strait | |
CN202624586U (en) | Online sea water quality monitoring buoy | |
Jindal et al. | Challenges and issues in underwater acoustics sensor networks: A review | |
CN109781382B (en) | Cable subsurface buoy ocean internal wave monitoring system based on vector sensor | |
CN104267643A (en) | Target positioning recognition system of underwater robot | |
CN104215988A (en) | Underwater target positioning method | |
CN101831923B (en) | Automatic monitoring technical method for marine structures with underwater wireless transmission system | |
CN111983563B (en) | Remote advanced anti-submarine early warning array and system based on distributed optical fiber acoustic wave sensing | |
CN108423140B (en) | Omnidirectional active acoustic fence system | |
CN115407404B (en) | Self-adaptive ocean mobile acoustic chromatography device | |
CN209321187U (en) | A kind of automatic tour marine float platform | |
CN205366005U (en) | Polygonized structure's marine floating nuclear electric power generation is equipped | |
CN210608485U (en) | Underwater wireless communication device | |
CN105501404A (en) | Oversea floating type nuclear power generating device of polygonal structure | |
CN111268035A (en) | Swinging type wave energy ocean comprehensive detection buoy | |
CN110707791B (en) | Ultrasonic wave-based remote high-power underwater wireless charging system | |
CN104765039B (en) | The method that passive sonar operating distance is improved using shallow sound field Spatial characteristic | |
CN108001627B (en) | Passive acoustic mooring system and submarine observation system | |
GB2504685A (en) | Environmental survey apparatus incorporating a buoy and mooring mounted sensors | |
CN110190898A (en) | A kind of communication means of control subsurface buoy long-range on the bank | |
CN211076276U (en) | Device for carrying out attitude conversion on tiny sonar array based on unmanned ship | |
CN217601330U (en) | Floating offshore installation | |
CN113391316B (en) | Underwater bottom-sinking suspension type acoustic marker | |
CN215169912U (en) | Seabed natural gas hydrate bubble leakage positioning device based on small array | |
CN213323584U (en) | Surveying and mapping device for ocean use |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200522 |