CN216332651U - Ship state monitoring system - Google Patents
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- CN216332651U CN216332651U CN202122323884.2U CN202122323884U CN216332651U CN 216332651 U CN216332651 U CN 216332651U CN 202122323884 U CN202122323884 U CN 202122323884U CN 216332651 U CN216332651 U CN 216332651U
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Abstract
This application is applicable to boats and ships safety technical field, provides a boats and ships condition monitoring system, including target terminal equipment and with a plurality of boats and ships condition monitoring terminal of target terminal equipment wireless connection, boats and ships condition monitoring system includes: the state monitoring circuit is used for acquiring the attitude information of the ship; the main control circuit is connected with the state monitoring circuit and used for determining the driving state of the ship according to the attitude information and generating early warning information when the driving state is an abnormal state; the wireless communication circuit is connected with the main control circuit and used for sending early warning information to the target terminal equipment; the emergency communication circuit is connected with the main control circuit and used for sending early warning information to the target terminal equipment based on the short message communication technology when the wireless communication circuit is abnormal; and the power supply circuit is used for supplying power to the state monitoring circuit, the master control circuit, the wireless communication circuit and the emergency communication circuit, so that a ship manager or the outside can timely know the abnormal state of the ship, and the occurrence of ship safety accidents is avoided.
Description
Technical Field
The application belongs to the technical field of ship safety, and particularly relates to a ship state monitoring system.
Background
At present, with the continuous development of economy and transportation industry, water traffic is increasingly busy. Statistically, more than 140 million ships around the world are responsible for transporting 80% of trade goods around the world every day, which makes the safety of water traffic a serious challenge. In recent years, accidents such as the ship on water turns over and sinks and the like happen, and serious life and property losses are caused. In order to reduce the occurrence of accidents such as the overturn and sinking of a ship on water and improve the safety of water traffic, a ship state monitoring system can be usually arranged on the ship to monitor the running state of the ship, so that early warning prompt is carried out when the ship is abnormal, a ship manager or the outside can timely know the abnormal state of the ship, and the accident can be prevented by timely taking corresponding measures.
The existing ship condition monitoring system generally adopts a traditional wireless communication module (for example, a mobile communication module) to send an early warning signal to the outside. When an accident occurs to a ship and a wireless communication module in the ship state monitoring system is damaged, the ship state monitoring system cannot send out an early warning signal, so that a ship manager or the outside cannot know the abnormal state of the ship and serious safety accidents are caused.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present application provides a ship state monitoring system, so as to solve the technical problem that a serious safety accident is caused because the existing ship state monitoring system cannot send out an early warning signal when a wireless communication module inside the existing ship state monitoring system is damaged.
The embodiment of the application provides a ship state monitoring system, including target terminal equipment and with a plurality of ship state monitoring terminal of target terminal equipment wireless connection, ship state monitoring terminal includes:
the state monitoring circuit is used for acquiring the attitude information of the ship;
the main control circuit is connected with the state monitoring circuit and used for determining the running state of the ship according to the attitude information and generating early warning information when the running state is an abnormal state;
the wireless communication circuit is connected with the main control circuit and used for sending the early warning information to target terminal equipment;
the emergency communication circuit is connected with the main control circuit and used for sending the early warning information to the target terminal equipment based on a short message communication technology when the wireless communication circuit is abnormal;
and the power supply circuit is used for supplying power to the state monitoring circuit, the master control circuit, the wireless communication circuit and the emergency communication circuit.
Optionally, the ship state monitoring terminal further includes an early warning circuit connected to the main control circuit; the early warning circuit is used for sending out an early warning signal based on the early warning information.
Optionally, the power supply circuit includes a first battery pack, and the power supply circuit is configured to supply power to the state monitoring circuit, the main control circuit, the wireless communication circuit, and the emergency communication circuit based on a power signal provided by the first battery pack.
Optionally, the power supply circuit includes:
the first voltage conversion circuit is connected with an alternating current power supply in the power supply device, and is used for converting an alternating current signal output by the alternating current power supply into a direct current signal and supplying power to the state monitoring circuit, the main control circuit, the wireless communication circuit and the emergency communication circuit based on the direct current signal;
and the second voltage conversion circuit is connected with a second battery pack in the power supply device, and is used for supplying power to the state monitoring circuit, the main control circuit, the wireless communication circuit and the emergency communication circuit based on a direct current signal provided by the second battery pack when the alternating current power supply does not output an alternating current signal.
Optionally, the state monitoring circuit includes:
the acceleration sensor is connected with the main control circuit and used for acquiring an actual acceleration value of the ship in the running process and sending the actual acceleration value to the main control circuit;
correspondingly, the main control circuit is specifically configured to determine the driving state of the ship based on the actual acceleration value and a preset acceleration value.
Optionally, the state monitoring circuit includes:
the angular velocity sensor is connected with the main control circuit and used for acquiring an actual angular velocity value of the ship in the driving process and sending the actual angular velocity value to the main control circuit;
correspondingly, the main control circuit is specifically configured to determine the driving state of the ship based on the actual angular velocity value and a preset angular velocity value.
Optionally, the state monitoring circuit further includes:
and the positioning unit is connected with the main control circuit and is used for acquiring the position information of the ship state monitoring system and sending the position information to the main control circuit.
Optionally, the early warning circuit includes:
and the buzzer is connected with the main control circuit and used for carrying out early warning prompt based on a preset early warning strategy when receiving the early warning instruction.
Optionally, the early warning circuit includes:
the manual early warning circuit is connected with the main control circuit and used for sending a first control instruction to the main control circuit when detecting that a preset early warning control is triggered, and the first control instruction is used for indicating the main control circuit to generate an early warning instruction.
Optionally, the ship state monitoring system further includes a tamper circuit connected to the main control circuit.
The ship state monitoring system provided by the embodiment of the application has the following beneficial effects:
the ship state monitoring system that this application embodiment provided, except including wireless communication circuit, still include emergency communication circuit, emergency communication circuit can be when wireless communication circuit is unusual, send early warning signal to target terminal equipment based on short message communication technique, and like this, even the ship takes place the accident and leads to the wireless communication circuit among the ship state monitoring system to damage, emergency communication unit among the ship state monitoring system also can send early warning signal for target terminal equipment, thereby can make ship administrator or the external world in time learn the abnormal state of ship, the possibility that the safety accident takes place for the ship has been reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a ship condition monitoring system according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a ship state monitoring terminal according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a ship state monitoring terminal according to another embodiment of the present application;
fig. 4 is a schematic structural diagram of a ship state monitoring terminal according to yet another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It is noted that the terminology used in the description of the embodiments of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application. In the description of the embodiments of the present application, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an associative relationship describing an association, meaning that there may be three relationships, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more, and "at least one", "one or more" means one, two or more, unless otherwise specified.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a ship state monitoring system according to an embodiment of the present disclosure. As shown in fig. 1, the ship condition monitoring system may include a target terminal device 300 and a plurality of ship condition monitoring terminals 100 wirelessly connected to the target terminal device 300. The plurality of ship state monitoring terminals 100 may be provided on a ship.
In the embodiment of the present application, the target terminal device 300 may be a terminal device mounted with a ship monitoring platform installed on shore, or may be a terminal device such as a computer on the ship or a mobile phone of a ship manager, and is not particularly limited herein. The target terminal device 300 may be configured to receive the warning signal or the ship attitude information transmitted by the ship state monitoring terminal 100.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a ship state monitoring terminal according to an embodiment of the present disclosure. As shown in fig. 2, the ship condition monitoring terminal 100 may include: the device comprises a state monitoring circuit 11, a main control circuit 12, a wireless communication circuit 13, an emergency communication circuit 14 and a power supply circuit 15. Wherein:
and the state monitoring circuit 11 is used for acquiring the attitude information of the ship.
And the main control circuit 12 is connected with the state monitoring circuit 11, and the main control circuit 12 is used for determining the driving state of the ship according to the attitude information and generating early warning information when the driving state is an abnormal state.
The wireless communication circuit 13 is connected to the main control circuit 12, and is configured to send the warning information to the target terminal device 300.
The emergency communication circuit 14 is connected to the main control circuit 12, and is configured to send the warning information to the target terminal device 300 based on the short message communication technology when the wireless communication circuit 13 is abnormal.
And the power supply circuit 15 is connected with the state monitoring circuit 11, the main control circuit 12, the wireless communication circuit 13 and the emergency communication circuit 14 and is used for supplying power to the state monitoring circuit 11, the main control circuit 12, the wireless communication circuit 13 and the emergency communication circuit 14.
In this embodiment, the attitude information of the ship may include, but is not limited to, an actual acceleration value, an actual angular velocity value, position information, and the like of the ship. After acquiring the attitude information of the ship, the state monitoring circuit 11 may send the attitude information of the ship to the main control circuit 12.
After receiving the attitude information sent by the state monitoring circuit 11, the main control circuit 12 may compare the actual acceleration value of the ship sent by the state monitoring circuit 11 with a preset acceleration value, and determine that the running state of the ship is an abnormal state when the actual acceleration value of the ship is greater than the preset acceleration value. Or, the main control circuit 12 may compare the actual angular velocity value of the ship sent by the state monitoring circuit 11 with a preset angular velocity value, and determine that the driving state of the ship is an abnormal state when the actual angular velocity value of the ship is greater than the preset angular velocity value. Alternatively, the main control circuit 12 may determine whether the ship deviates from the course based on the position information of the ship sent by the state monitoring circuit 11, and determine that the driving state of the ship is an abnormal state when the ship deviates from the course. The main control circuit 12 can generate the early warning information when determining that the driving state of the ship is abnormal, and send the early warning information to the target terminal through the wireless communication circuit.
In particular applications, the wireless communication circuit 13 may include, but is not limited to: a mobile communication module or a wireless fidelity (WIFI) module, etc.
The mobile communication module may be a mobile communication module based on a second generation mobile communication technology (2th generation mobile communication technology, 2G), a fourth generation mobile communication technology (4th generation mobile communication technology, 4G), a fifth generation mobile communication technology (5th generation mobile communication technology, 5G), and the like, and is not particularly limited herein.
In a specific application, the emergency communication circuit 14 may be a radio positioning satellite system (RDSS), and an RDSS radio frequency transceiver chip, an RDSS baseband chip, a power amplifier chip, and other Low Noise Amplifier (LNA) circuits are integrated therein, and a passive antenna is disposed on the RDSS radio frequency transceiver chip to implement short message communication common connection and satellite positioning functions of the RDSS.
Above can see, the ship state monitoring system that this embodiment provided, except including wireless communication circuit, still include emergency communication circuit, emergency communication circuit can send early warning signal to target terminal equipment based on short message communication technique when wireless communication circuit is unusual, like this, even the ship takes place the accident and leads to the wireless communication circuit among the ship state monitoring system to damage, the emergency communication unit among the ship state monitoring system also can send early warning signal to target terminal equipment, thereby can make the ship administrator or the external world in time learn the abnormal state of ship, reduced the possibility that the incident takes place for the ship.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a ship state monitoring terminal according to another embodiment of the present application. As shown in fig. 3, compared to the embodiment shown in fig. 1, the ship state monitoring system 100 in this embodiment may further include an early warning circuit 16 connected to the main control circuit 12, where the early warning circuit 16 is configured to send an early warning signal based on the early warning information generated by the main control unit.
Referring to fig. 3, in another embodiment of the present application, the state monitoring circuit 11 may specifically include an acceleration sensor 111 connected to the main control circuit 12.
Specifically, the acceleration sensor 111 is configured to collect an actual acceleration value of the ship during driving, and send the actual acceleration value to the main control circuit. Correspondingly, the main control circuit 12 may compare the actual acceleration value with a preset acceleration value, and determine that the running state of the ship is an abnormal state when the actual acceleration value is greater than the preset acceleration value; and determining that the running state of the ship is a normal state when the actual acceleration value is smaller than the preset acceleration value.
In one possible implementation, the preset acceleration value may include a first acceleration value and a second acceleration value. And the second acceleration value is greater than the first preset acceleration value.
In this implementation, main control circuit 12 can all compare the actual acceleration value of boats and ships in the driving process with first acceleration value and second acceleration value, when this actual acceleration value is greater than first acceleration value and is less than the second acceleration value, outputs first early warning instruction to early warning circuit 16, when this actual acceleration value is greater than the second acceleration value, outputs second early warning instruction to early warning circuit 16.
Referring to fig. 3, in another embodiment of the present application, the state monitoring circuit 11 may specifically include an angular velocity sensor 112 connected to the main control circuit 12.
Specifically, the angular velocity sensor 111 is configured to collect an actual angular velocity value of the ship during driving, and send the actual angular velocity value to the main control circuit. Correspondingly, the main control circuit 12 may compare the actual angular velocity value with the preset angular velocity value, and determine that the running state of the ship is an abnormal state when the actual angular velocity value is greater than the preset angular velocity value; and determining that the running state of the ship is a normal state when the actual angular velocity value is smaller than the preset angular velocity value.
In one possible implementation, the preset angular velocity value may include a first angular velocity value and a second angular velocity value. The second angular velocity value is greater than the first preset angular velocity value.
In this implementation manner, the main control circuit 12 may compare an actual angular velocity value of the ship during the driving process with both the first angular velocity value and the second angular velocity value, output a first warning instruction to the warning circuit 16 when the actual acceleration value is greater than the first angular velocity value and smaller than the second angular velocity value, and output a second warning instruction to the warning circuit 16 when the actual angular velocity value is greater than the second angular velocity value.
Referring to fig. 3, in another embodiment of the present application, the status monitoring circuit 11 may specifically include a positioning unit 113 connected to the main control circuit 12.
The positioning unit 113 is configured to collect position information of the ship state monitoring system 100 and send the position information to the main control circuit 12.
In a specific application, the positioning unit 113 may be a positioning unit based on a beidou navigation satellite system (BDS), a positioning unit based on a Global Positioning System (GPS), or the like, and a specific positioning manner of the positioning unit 113 is not particularly limited herein.
Referring to fig. 3, in another embodiment of the present application, the warning circuit 16 may specifically include a buzzer 161 connected to the main control circuit 12. The buzzer 161 is configured to perform an early warning prompt based on a preset early warning policy when receiving an early warning instruction.
Specifically, the buzzer 161 may perform the warning prompt based on the first preset warning strategy when receiving the first warning instruction. The buzzer 161 may perform the warning prompt based on the second preset warning policy when receiving the second warning instruction. Wherein, the first early warning strategy may be: emitting an alarm sound based on a first preset frequency; the second warning strategy may be: and sending out an alarm sound based on the second preset frequency. The second predetermined frequency is greater than the first predetermined frequency.
With continued reference to fig. 3, in another embodiment of the present application, the warning circuit 16 may further include a manual warning circuit 162 connected to the main control circuit 12. The manual warning circuit 162 includes a preset warning control (not shown). The manual early warning circuit 162 is configured to send a first control instruction to the main control circuit 12 when detecting that the preset early warning control is triggered, so as to instruct the main control circuit 12 to generate an early warning instruction.
In this embodiment, when a ship manager finds that the running state of the ship is abnormal, a preset early warning control in the manual early warning circuit 162 may be manually triggered to control the early warning circuit 16 to send out an early warning signal.
Referring to fig. 3, in another embodiment of the present application, the power supply circuit 15 may specifically include: a first voltage conversion circuit 151 and a second voltage conversion circuit 152.
Specifically, the first voltage conversion circuit 151 is connected to the ac power supply 21 in the power supply device 200, and the first voltage conversion circuit 151 is configured to convert an ac signal output by the ac power supply 21 into a dc signal and supply power to the state monitoring circuit 11, the main control circuit 12, the wireless communication circuit 13, the emergency communication circuit 14, and the warning circuit 16 based on the dc signal.
The second voltage conversion circuit 152 is connected to the second battery pack 22 in the power supply device 200, and the second voltage conversion circuit is configured to supply power to the state monitoring circuit 11, the main control circuit 12, the wireless communication circuit 13, the emergency communication circuit 14, and the early warning circuit 16 based on a dc electrical signal provided by the second battery pack 22 when the ac power supply 21 does not output an ac electrical signal.
In a specific application, the first voltage converting circuit 151 may include an ac-dc converter circuit, a voltage dropping circuit (not shown), and the like. The ac-dc converter circuit is used to convert an ac signal output from the ac power supply 21 into a dc signal. The voltage reduction circuit can perform voltage conversion on the direct current signal to obtain a direct current signal required by the work of the state monitoring circuit 11, the main control circuit 12, the wireless communication circuit 13, the emergency communication circuit 14 and the early warning circuit 16, and further supply power to the state monitoring circuit 11, the main control circuit 12, the wireless communication circuit 13, the emergency communication circuit 14 and the early warning circuit 16.
It can be seen from the above that, according to the ship monitoring terminal provided by this embodiment, when the ac power supply in the power supply device of the ship is abnormal, each circuit in the ship state monitoring system may be powered on based on the second battery pack in the power supply device, so that under the condition that the power supply device of the ship is normal, the electric energy of the ship monitoring terminal may be saved.
With continued reference to fig. 3, in yet another embodiment of the present application, the vessel condition monitoring system 100 may further include a tamper unit 17 connected to the main control circuit 12. The anti-dismantling unit 17 may be formed by combining a plurality of strong magnets and anti-dismantling devices, and when detecting that the force for forcibly dismantling the ship state monitoring system 100 exceeds the attractive force of the strong magnets, the anti-dismantling unit 17 may send an alarm instruction to the control circuit 12 to instruct the control circuit 12 to control the alarm circuit to give an alarm prompt.
Above can see that the ship state monitoring system that this embodiment provided can prevent that ship state monitoring system from being demolishd by force, and then can prevent that ship state monitoring system from being stolen.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a ship state monitoring terminal according to another embodiment of the present application. As shown in fig. 4, the power supply circuit 15 in the present embodiment may include a first battery pack 153, as compared to the embodiment corresponding to fig. 1. The power supply circuit 15 may supply power to the state monitoring circuit 11, the main control circuit 12, the wireless communication circuit 13, the emergency communication circuit 14, the early warning circuit 16, and the tamper-proof circuit 17 based on the power supply signal provided by the first battery pack 153.
In a particular application, the first battery pack 153 may be a rechargeable battery, such as a lithium battery.
It should be noted that other circuits in this embodiment are the same as those in fig. 2, and reference may be specifically made to the description of the relevant circuit in fig. 2, which is not repeated herein.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. The ship state monitoring system is characterized by comprising a target terminal device and a plurality of ship state monitoring terminals in wireless connection with the target terminal device, wherein each ship state monitoring terminal comprises:
the state monitoring circuit is used for acquiring the attitude information of the ship;
the main control circuit is connected with the state monitoring circuit and used for determining the running state of the ship according to the attitude information and generating early warning information when the running state is an abnormal state;
the wireless communication circuit is connected with the main control circuit and used for sending the early warning information to target terminal equipment;
the emergency communication circuit is connected with the main control circuit and used for sending the early warning information to the target terminal equipment based on a short message communication technology when the wireless communication circuit is abnormal;
and the power supply circuit is used for supplying power to the state monitoring circuit, the master control circuit, the wireless communication circuit and the emergency communication circuit.
2. The ship state monitoring system of claim 1, wherein the ship state monitoring terminal further comprises an early warning circuit connected with the main control circuit; the early warning circuit is used for sending out an early warning signal based on the early warning information.
3. The system of claim 1, wherein the power supply circuit comprises a first battery pack, and the power supply circuit is configured to supply power to the status monitoring circuit, the master control circuit, the wireless communication circuit, and the emergency communication circuit based on a power signal provided by the first battery pack.
4. The ship condition monitoring system of claim 1, wherein the power supply circuit comprises:
the first voltage conversion circuit is connected with an alternating current power supply in a power supply device, and is used for converting an alternating current signal output by the alternating current power supply into a direct current signal and supplying power to the state monitoring circuit, the main control circuit, the wireless communication circuit and the emergency communication circuit based on the direct current signal;
and the second voltage conversion circuit is connected with a second battery pack in the power supply device, and is used for supplying power to the state monitoring circuit, the main control circuit, the wireless communication circuit and the emergency communication circuit based on a direct current signal provided by the second battery pack when the alternating current power supply does not output an alternating current signal.
5. The marine vessel condition monitoring system of claim 1, wherein the condition monitoring circuit comprises:
the acceleration sensor is connected with the main control circuit and used for acquiring an actual acceleration value of the ship in the running process and sending the actual acceleration value to the main control circuit;
correspondingly, the main control circuit is specifically configured to determine the driving state of the ship based on the actual acceleration value and a preset acceleration value.
6. The marine vessel condition monitoring system of claim 1, wherein the condition monitoring circuit comprises:
the angular velocity sensor is connected with the main control circuit and used for acquiring an actual angular velocity value of the ship in the driving process and sending the actual angular velocity value to the main control circuit;
correspondingly, the main control circuit is specifically configured to determine the driving state of the ship based on the actual angular velocity value and a preset angular velocity value.
7. The marine vessel condition monitoring system of claim 1, wherein the condition monitoring circuit further comprises:
and the positioning unit is connected with the main control circuit and is used for acquiring the position information of the ship state monitoring system and sending the position information to the main control circuit.
8. The ship condition monitoring system of claim 2, wherein the early warning circuit comprises:
and the buzzer is connected with the main control circuit and used for carrying out early warning prompt based on a preset early warning strategy when receiving the early warning information.
9. The ship condition monitoring system of claim 2, wherein the early warning circuit comprises:
the manual early warning circuit is connected with the main control circuit and used for sending a first control instruction to the main control circuit when detecting that a preset early warning control is triggered, and the first control instruction is used for indicating the main control circuit to generate an early warning instruction.
10. The vessel condition monitoring system according to any one of claims 1 to 9, further comprising a tamper circuit connected to the main control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122323884.2U CN216332651U (en) | 2021-09-24 | 2021-09-24 | Ship state monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122323884.2U CN216332651U (en) | 2021-09-24 | 2021-09-24 | Ship state monitoring system |
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| CN216332651U true CN216332651U (en) | 2022-04-19 |
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| CN202122323884.2U Active CN216332651U (en) | 2021-09-24 | 2021-09-24 | Ship state monitoring system |
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