A ship body structure state monitoring method, device, storage medium and server

Abstract

Embodiments of the present application provide a ship structure state monitoring method and device, a storage medium and a server, the method comprising: determining an external force received by a ship structure in a preset first time period, and determining that a fine crack has occurred in the ship structure if the external force does not exceed a preset threshold; evaluating a repair time of the ship structure according to a fatigue crack propagation rate of the fine crack that has occurred in the ship structure; and determining that the ship does not meet a navigation standard, locking a power device of the ship, and issuing an alarm that the ship structure needs to be repaired if a current time reaches the repair time of the ship structure. Thus, the repair time of the ship structure is evaluated based on the fatigue crack propagation rate of the fine crack that has occurred in the ship structure, and the ship structure is prompted to be repaired if the current time reaches the repair time of the ship structure, so that a shipping accident caused by untimely repair of the ship structure can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent ship control, and in particular to a ship structure state monitoring method and device, a storage medium and a server. BACKGROUND

[0002] An intelligent ship refers to a ship that utilizes sensor, communication, Internet of Things, Internet and other technical means to automatically perceive and obtain information and data of the ship itself, the marine environment, logistics, a port and the like, and realizes intelligent operation in ship navigation, management, maintenance, cargo transportation and the like based on computer technology, automatic control technology and big data processing and analysis technology, so as to make the ship safer, more environmentally friendly, more economical and more reliable.

[0003] With the continuous development of intelligent ships, at present, the maintenance of the ship structure is basically based on experience to maintain the ship structure, but often because the maintenance of the ship structure is not timely, the ship structure is damaged, so as to cause the ship to overturn and the like when the ship sails in the open sea. SUMMARY

[0004] In order to solve the above technical problem that the ship structure is damaged because the maintenance of the ship structure is not timely, so as to cause the ship to overturn and the like when the ship sails in the open sea, the present application provides a ship structure state monitoring method and device, a storage medium and a server, and a storage medium. The specific technical solutions are as follows:

[0005] In the first aspect of the embodiment of the present application, a ship structure state monitoring method is first provided, and the method comprises:

[0006] determining an external force received by the ship structure in a preset first time period, and determining a fine crack that has appeared in the ship structure in a case where the external force does not exceed a preset threshold value;

[0007] evaluating a maintenance time of the ship structure according to a fatigue crack propagation speed of the fine crack that has appeared in the ship structure;

[0008] in a case where the current time reaches the maintenance time of the ship structure, determining that the ship does not meet a navigation standard, the ship power equipment is self-locked, and an alarm that the ship structure needs to be maintained is issued.

[0009] In an optional embodiment, the determination of the external force received by the ship structure in the preset first time period comprises:

[0010] acquiring a circuit signal collected for the ship structure through a sensor arranged on the ship structure in the preset first time period;

[0011] Separating differential mode signals from the circuit signals and removing common mode signals by using a preset filter circuit;

[0012] Inputting the differential mode signals into a processor to continuously analyze and convert the signal waveforms into external forces received by the ship body structure.

[0013] In an optional implementation, the separating differential mode signals from the circuit signals and removing common mode signals by using a preset filter circuit comprises:

[0014] Separating differential mode signals from the circuit signals and removing common mode signals by using a preset differential filter circuit.

[0015] In an optional implementation, the evaluating the repair time of the ship body structure according to the fatigue crack propagation rate of the fine cracks already appeared in the ship body structure comprises:

[0016] Determining the damage times of the ship body structure by using an S-N curve method according to the fatigue crack propagation rate of the fine cracks already appeared in the ship body structure;

[0017] Determining the damage nautical miles of the ship body structure by performing a probability analysis on the damage and voyage of the ship body structure within a preset second time period;

[0018] Evaluating the repair time of the ship body structure based on the damage times and the damage nautical miles.

[0019] In an optional implementation, the S-N curve method comprises:

[0020]

[0021] The N is a stress amplitude, the S is a damage times caused by a constant amplitude stress, and the m is an inverse of a slope of an S-N mean line;

[0022] The is The a is a constant, the d is a constant of a standard deviation under a mean value, and the σ is a standard deviation.

[0023] In an optional implementation, the determining the damage nautical miles of the ship body structure by performing a probability analysis on the damage and voyage of the ship body structure within a preset second time period comprises:

[0024] Performing a probability analysis on the damage and voyage of the ship body structure within a preset second time period in a normal distribution manner to determine the damage nautical miles of the ship body structure.

[0025] In an optional implementation, the method further comprises:

[0026] determine that the hull structure suffers damage when the external force exceeds the preset threshold value;

[0027] issue an alarm that the hull structure suffers damage when the hull structure suffers damage.

[0028] In an optional embodiment, the method further comprises:

[0029] determine that the hull meets the navigation standard to enable the ship to navigate when the maintenance time of the hull structure is not reached at the current time;

[0030] monitor whether the hull structure is damaged during navigation of the ship;

[0031] determine the damage degree of the hull structure if the hull structure is damaged;

[0032] determine whether the hull structure is in a high-risk state according to the damage degree;

[0033] issue a high-risk alarm of the hull structure if it is determined that the hull structure is in a high-risk state.

[0034] In a second aspect of the embodiments of the present application, a hull structure state monitoring device is further provided, and the device comprises:

[0035] an external force determination module configured to determine the external force received by the hull structure within a preset first time period;

[0036] a crack determination module configured to determine the fine cracks that have occurred in the hull structure when the external force does not exceed the preset threshold value;

[0037] a time evaluation module configured to evaluate the maintenance time of the hull structure according to the fatigue crack propagation rate of the fine cracks that have occurred in the hull structure;

[0038] an alarm issuing module configured to determine that the hull does not meet the navigation standard and the hull power equipment is self-locked when the maintenance time of the hull structure is reached at the current time, and issue an alarm that the hull structure needs to be maintained.

[0039] In a third aspect of the embodiments of the present application, a server is further provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;

[0040] the memory is configured to store a computer program;

[0041] the processor is configured to execute the program stored on the memory to implement the hull structure state monitoring method in any of the first aspect.

[0042] In a fourth aspect of the embodiments of the present application, a storage medium is also provided, which stores instructions that, when executed on a computer, cause the computer to perform the hull structure state monitoring method of any one of the first aspect.

[0043] In a fifth aspect of the embodiments of the present application, a computer program product containing instructions is also provided, which, when executed on a computer, cause the computer to perform the hull structure state monitoring method of any one of the above.

[0044] The technical solution provided by the embodiments of the present application determines the external force received by the hull structure within a preset first time period, determines the fine crack that has appeared in the hull structure in the case that the external force received by the hull structure does not exceed a preset threshold, evaluates the repair time of the hull structure according to the fatigue crack propagation speed of the fine crack that has appeared in the hull structure, determines that the hull does not meet the navigation standard in the case that the current time reaches the repair time of the hull structure, self-locks the hull power equipment, and issues an alarm that the hull structure needs to be repaired. In this way, the repair time of the hull structure is evaluated based on the fatigue crack propagation speed of the fine crack that has appeared in the hull structure, and in the case that the current time reaches the repair time of the hull structure, it is determined that the hull does not meet the navigation standard, the hull power equipment is self-locked, and an alarm is issued that the hull structure needs to be repaired, prompting the hull structure to be repaired, which can avoid the occurrence of shipping accidents caused by the hull structure not being repaired in time. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the specification.

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those drawings can also help to obtain other drawings without creative labor for those skilled in the art.

[0047] Figure 1 An implementation flowchart of a hull structure state monitoring method shown in the embodiments of the present application;

[0048] Figure 2 An implementation flowchart of a hull structure external force determination method shown in the embodiments of the present application;

[0049] Figure 3 A schematic diagram of a differential filter circuit shown in the embodiments of the present application;

[0050] Figure 4 FIG. 1 is a structural schematic diagram of a hull structure state monitoring device according to an embodiment of the present application;

[0051] Figure 5 FIG. 1 is a structural schematic diagram of a hull structure state monitoring device according to an embodiment of the present application; DETAILED DESCRIPTION

[0052] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0053] As shown in FIG. 1, an embodiment of the present application provides an implementation flowchart of a hull structure state monitoring method, which is applied to a server and can specifically include the following steps: Figure 1

[0054] S101, determining an external force received by a hull structure in a preset first time period, and determining a fine crack that has occurred in the hull structure in a case where the external force does not exceed a preset threshold.

[0055] In the embodiment of the present application, before starting a ship, a self-checking action of a hull as a whole before sailing is performed by a system, an external force received by a hull structure is determined in a preset first time period, and whether the hull structure has a loss is determined according to the external force received by the hull structure.

[0056] Specifically, as shown in FIG. 1, an embodiment of the present application provides an implementation flowchart of a method for determining an external force received by a hull structure, which can specifically include the following steps: Figure 2

[0057] S201, acquiring a circuit signal collected for the hull structure through a sensor arranged on the hull structure in a preset first time period.

[0058] In the embodiment of the present application, a sensor can be arranged on the hull structure in advance, so that a circuit signal collected for the hull structure is acquired through the sensor arranged on the hull structure in a preset first time period.

[0059] For example, in the embodiment of the present application, a sensor can be arranged on the hull structure in advance, so that a circuit signal collected for the hull structure is acquired through the sensor arranged on the hull structure in the last half hour.

[0060] ​​Specifically, the pressure-sensitive deformation sensor can be inlaid on the hull structure in advance, and the circuit signal collected for the hull structure can be acquired by the pressure-sensitive deformation sensor arranged on the hull structure within a preset first time period.

[0061] In S202, a differential mode signal is separated from the circuit signal by using a preset filter circuit, and a common mode signal is removed.

[0062] Because the ship will be subjected to the hull deformation caused by the wave impact on the hull in the water, the electrical signal in the control system is an interference signal, which needs to be filtered. In the filtering process, the filtering mode that can be performed is that a differential mode signal is separated from the circuit signal by using a preset filter circuit, and a common mode signal is removed.

[0063] Specifically, a differential mode signal is separated from the circuit signal by using a preset differential filter circuit, and a common mode signal is removed. Thus, a relatively stable signal data can be extracted, and the specific definition method is to define the value according to the critical value of the stress that will cause damage to the hull structure.

[0064] As shown in FIG. 1, a differential filter circuit schematic diagram provided by an embodiment of the present application is shown, and the output voltage value obtained by the differential filter circuit can be calculated according to the following formula. Figure 3

[0065]

[0066]

[0067]

[0068] In S203, the differential mode signal is input into a processor, and a signal waveform is continuously analyzed and converted into an external force received by the hull structure.

[0069] For the differential mode signal, the differential mode signal can be input into a processor, and a signal waveform is continuously analyzed and converted into an external force received by the hull structure.

[0070] The main data type is to convert the electrical signal of the force measured by the pressure-sensitive deformation sensor into a force value according to the analog quantity 0-10V voltage.

[0071] Thus, the external force received by the hull structure can be determined by the above steps. For the external force received by the hull structure, if the external force received by the hull structure exceeds a preset threshold, it is determined that the hull structure is damaged, that is, the external force received by the hull structure exceeds the maximum value in a short time, thereby causing damage to the hull structure of the ship. ​

[0072] Thus, in the case of the ship structure suffering damage, an alarm is sent that the ship structure has damage, and an external force factor such as a large damage caused by a collision pair causes great damage in a short time.

[0073] In the case where the external force on the ship structure does not exceed the preset threshold, it can be determined that the ship structure has not suffered damage, and thus it is determined whether the ship meets the navigation standard. In order to determine whether the ship meets the navigation standard, it is necessary to determine the fine cracks that have occurred in the ship structure.

[0074] When the ship is long-term sailing in the sea and the metal shell is subjected to uncertain factors such as impact of sea waves or floating debris in the sea, the ship structure of the ship is damaged to a certain extent, at this time the ship will not appear any condition in a short time, but the metal of the ship structure will be subjected to metal fatigue, that is, fine cracks will occur in the metal of the ship structure.

[0075] S102, according to the fatigue crack propagation rate of the fine cracks that have occurred in the ship structure, evaluating the repair time of the ship structure.

[0076] In the embodiment of the application, the repair time of the ship structure can be evaluated according to the fatigue crack propagation rate of the fine cracks that have occurred in the ship structure, so that when repair is needed, relevant personnel are prompted to repair, thereby avoiding the occurrence of shipping accidents caused by the ship structure due to untimely repair.

[0077] Among them, for the fatigue crack propagation rate of the fine cracks that have occurred in the ship structure, the S-N curve method is used to determine the damage times of the ship structure, the damage and the distance of the ship structure suffered in a preset second time period are analyzed, the damage nautical miles of the ship structure are determined, and the repair time of the ship structure is evaluated based on the damage times and the damage nautical miles.

[0078] For the S-N curve method, it can specifically include:

[0079]

[0080] The N is the stress amplitude, the S is the number of times of damage caused by constant amplitude stress, and the m is the inverse of the slope of the S-N mean line;

[0081] The is The a is a constant, the d is a constant of the standard deviation of the mean, and the sigma is the standard deviation.

[0082] According to the formula, it can be concluded that the metal fatigue state of the ship body reaches the peak state after a certain number of damages, thereby causing irreversible damage to the overall structure of the ship body, that is, the fatigue crack propagation speed of the fine cracks in the ship body structure is determined by using the S-N curve method.

[0083] In addition, the damage and the distance of the ship body structure in a preset second time period are analyzed by using a normal distribution method to determine the damage distance of the ship body structure, so that the maintenance time of the ship body structure can be evaluated based on the damage number and the damage distance, and the maintenance time is the recommended maintenance time.

[0084] S103, in the case that the current time reaches the maintenance time of the ship body structure, it is determined that the ship body does not meet the navigation standard, the ship body power equipment is self-locked, and an alarm is issued that the ship body structure needs to be maintained.

[0085] In the embodiment of the present application, the current time can be determined, and in the case that the current time reaches the maintenance time of the ship body structure, it can be determined that the ship body does not meet the navigation standard, the ship body power equipment is self-locked, and an alarm is issued that the ship body structure needs to be maintained.

[0086] In the embodiment of the present application, in the case that the current time does not reach the maintenance time of the ship body structure, it is determined that the ship body meets the navigation standard, so that the ship can navigate, and in the case that the navigation permission is obtained, the ship body can navigate.

[0087] In the process of ship body navigation, the embodiment of the present application can obtain the circuit signal collected for the ship body structure by the sensor arranged on the ship body structure, separate the differential mode signal from the circuit signal by using the preset filter circuit and remove the common mode signal, input the differential mode signal into the processor, continuously analyze the signal waveform and convert it into the external force received by the ship body structure.

[0088] Thus, based on the external force, it is determined whether the ship body structure is damaged, the damage degree of the ship body structure is determined according to the damage degree, whether the ship body structure is in a high-risk state is determined according to the damage degree, and if it is determined that the ship body structure is in a high-risk state, a high-risk alarm of the ship body structure is issued.

[0089] Through the description of the technical solutions provided by the embodiments of the present application, by determining the external force received by the ship body structure in a preset first time period, in the case that the external force received by the ship body structure does not exceed a preset threshold, the fine cracks that have appeared in the ship body structure are determined, the maintenance time of the ship body structure is evaluated according to the fatigue crack propagation rate of the fine cracks that have appeared in the ship body structure, in the case that the current time reaches the maintenance time of the ship body structure, it is determined that the ship body does not meet the navigation standard, the ship body power equipment is self-locked, and an alarm that the ship body structure needs to be maintained is issued.

[0090] Thus, based on the fatigue crack propagation rate of the fine cracks that have appeared in the ship body structure, the maintenance time of the ship body structure is evaluated, in the case that the current time reaches the maintenance time of the ship body structure, it is determined that the ship body does not meet the navigation standard, the ship body power equipment is self-locked, and an alarm that the ship body structure needs to be maintained is issued, so as to prompt the maintenance of the ship body structure, and the occurrence of shipping accidents caused by the delayed maintenance of the ship body structure can be avoided.

[0091] Corresponding to the method embodiments, the embodiments of the present application also provide a ship body structure state monitoring device, as shown in Figure 4 The device can include an external force determination module 410, a crack determination module 420, a time evaluation module 430, and an alarm issuing module 440.

[0092] The external force determination module 410 is configured to determine the external force received by the ship body structure in a preset first time period.

[0093] The crack determination module 420 is configured to determine the fine cracks that have appeared in the ship body structure in the case that the external force does not exceed a preset threshold.

[0094] The time evaluation module 430 is configured to evaluate the maintenance time of the ship body structure according to the fatigue crack propagation rate of the fine cracks that have appeared in the ship body structure.

[0095] The alarm issuing module 440 is configured to determine that the ship body does not meet the navigation standard, the ship body power equipment is self-locked, and issue an alarm that the ship body structure needs to be maintained in the case that the current time reaches the maintenance time of the ship body structure.

[0096] In the specific embodiments of the present application, the external force determination module 410 specifically includes:

[0097] The signal acquisition sub-module is configured to acquire the circuit signal collected for the ship body structure through the sensor arranged on the ship body structure in a preset first time period.

[0098] The signal filtering sub-module is configured to separate the differential mode signal from the circuit signal and remove the common mode signal by using a preset filter circuit.

[0099] The external force determination sub-module is configured to input the differential mode signal into a processor, and convert the signal waveform into the external force received by the ship body structure through continuous analysis.

[0100] In the embodiment of the present application, the signal filtering sub-module is configured to:

[0101] The preset differential filtering circuit is used to separate the differential mode signal from the circuit signal and remove the common mode signal.

[0102] In the embodiment of the present application, the time evaluation module 430 specifically includes:

[0103] The number of times determination sub-module is configured to determine the number of times of damage of the ship body structure by using the S-N curve method according to the fatigue crack propagation rate of the fine crack that has appeared in the ship body structure.

[0104] The sea mile number determination sub-module is configured to determine the damage sea mile number of the ship body structure by performing probability analysis on the damage and the voyage of the ship body structure within a preset second time period.

[0105] The time determination sub-module is configured to evaluate the repair time of the ship body structure based on the number of times of damage and the damage sea mile number.

[0106] In the embodiment of the present application, the S-N curve method includes:

[0107]

[0108] The N is a stress amplitude, the S is a number of times of damage caused by a constant amplitude stress, and the m is an inverse of a slope of an S-N mean line.

[0109] The is The a is a constant, the d is a constant of a standard deviation, and the sigma is a standard deviation.

[0110] In the embodiment of the present application, the sea mile number determination sub-module is configured to:

[0111] The damage sea mile number of the ship body structure is determined by performing probability analysis on the damage and the voyage of the ship body structure within a preset second time period in a normal distribution manner.

[0112] In the embodiment of the present application, the device further includes:

[0113] The loss warning module is configured to determine that the ship body structure is damaged when the external force exceeds a preset threshold.

[0114] In the event of damage to the hull structure, an alarm will be issued indicating that the hull structure is damaged.

[0115] In a specific embodiment of the present invention, the device further includes:

[0116] The high-risk alarm module is used to determine that the hull meets navigation standards if the maintenance time for the hull structure has not yet arrived at the current time, so that the ship can proceed with navigation.

[0117] During the ship's voyage, monitor whether the hull structure is damaged;

[0118] If the hull structure is damaged, determine the extent of the damage to the hull structure;

[0119] Determine whether the hull structure is in a high-risk condition based on the degree of damage.

[0120] If the hull structure is determined to be in a high-risk state, a high-risk alarm for the hull structure is issued.

[0121] This invention also provides a server, such as... Figure 5 As shown, it includes a processor 51, a communication interface 52, a memory 53, and a communication bus 54. The processor 51, the communication interface 52, and the memory 53 communicate with each other through the communication bus 54.

[0122] Memory 53 is used to store computer programs;

[0123] When processor 51 executes the program stored in memory 53, it performs the following steps:

[0124] Within a preset first time period, the external forces acting on the hull structure are determined, and if the external forces do not exceed a preset threshold, microcracks that have appeared in the hull structure are identified. Based on the fatigue crack propagation rate of the microcracks that have appeared in the hull structure, the maintenance time of the hull structure is assessed. If the maintenance time of the hull structure is reached at the current time, it is determined that the hull does not meet the navigation standards, the hull power equipment is self-locked, and an alarm is issued that the hull structure needs maintenance.

[0125] The communication bus mentioned in the above server can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0126] The communication interface is configured to communicate between the server and other devices.

[0127] The memory can include a random access memory (RAM) and can also include a non-volatile memory such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor.

[0128] The processor described above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc. It can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0129] In yet another embodiment provided by the present application, a storage medium is also provided, which stores instructions, when running on a computer, causes the computer to execute the ship structure state monitoring method described in any of the above embodiments.

[0130] In yet another embodiment provided by the present application, a computer program product containing instructions is also provided, when running on a computer, causes the computer to execute the ship structure state monitoring method described in any of the above embodiments.

[0131] In the embodiments described above, all or some of the steps can be implemented by hardware, software, firmware or any combination thereof. When implemented in software, all or some of the steps can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed by a computer, all or some of the computer instructions can generate the processes or functions described in the embodiments of the present application. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a storage medium or transmitted from one storage medium to another storage medium, for example, the computer instructions can be transmitted from a website site, a computer, a server or a data center to another website site, a computer, a server or a data center through a wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as DVD), or semiconductor media (such as solid state disk (SSD)) and the like.

[0132] It should be noted that, in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0133] Each of the embodiments in the specification is described in a related manner, and the same or similar parts between each of the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiment.

[0134] The above only describes the preferred embodiments of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for monitoring the structural condition of a ship, characterized in that, The method includes: Within a preset first time period, determine the external force on the hull structure, and if the external force does not exceed a preset threshold, determine the micro-cracks that have appeared in the hull structure. The timing of repairs for the hull structure is assessed based on the fatigue crack propagation rate of the fine cracks that have already appeared in the hull structure. If the maintenance time for the hull structure is reached at the current moment, it is determined that the hull does not meet the navigation standards, the hull power equipment is automatically locked, and an alarm is issued that the hull structure needs maintenance. Within a preset first time period, sensors installed on the hull structure acquire circuit signals for the hull structure; using a preset filtering circuit, differential mode signals are separated from the circuit signals, and common mode signals are removed; the differential mode signals are input to a processor, and the signal waveform is continuously analyzed and converted into external forces acting on the hull structure. The assessment of the repair readiness of the hull structure based on the fatigue crack propagation rate of the microcracks that have already appeared in the hull structure includes: For the fatigue crack propagation rate of the microcracks that have appeared in the hull structure, the number of damages to the hull structure is determined using the SN curve method; based on the damage suffered by the hull structure and the voyage within a preset second time period, a probability analysis is performed to determine the damage nautical miles of the hull structure; and the repair time of the hull structure is evaluated based on the number of damages and the damage nautical miles.

2. The method according to claim 1, characterized in that, The step of using a preset filtering circuit to separate the differential-mode signal from the circuit signal and remove the common-mode signal includes: using a preset differential filtering circuit to separate the differential-mode signal from the circuit signal and remove the common-mode signal.

3. The method according to claim 1, characterized in that, The SN curve method includes: N represents the stress amplitude, S represents the number of times damage is caused by constant amplitude stress, and m is the reciprocal of the slope of the SN mean line; for The The constant is the stated The standard deviation is a constant under the mean. The standard deviation is denoted as .

4. The method according to claim 1, characterized in that, The step of determining the number of nautical miles of damage to the hull structure by performing a probability analysis based on the damage suffered by the hull structure and the voyage within a preset second time period includes: using a normal distribution to perform a probability analysis on the damage suffered by the hull structure and the voyage within the preset second time period to determine the number of nautical miles of damage to the hull structure.

5. The method according to any one of claims 1 to 4, characterized in that, The method further includes: determining that the hull structure has been damaged when the external force exceeds a preset threshold; and issuing an alarm indicating that the hull structure has been damaged when the hull structure has been damaged.

6. The method according to any one of claims 1 to 5, characterized in that, The method further includes: determining that the hull meets navigation standards so that the ship can navigate if the maintenance time for the hull structure has not yet been reached at the current time; monitoring whether the hull structure is damaged during the ship's navigation; determining the degree of damage to the hull structure if the hull structure is damaged; determining whether the hull structure is in a high-risk state based on the degree of damage; and issuing a high-risk alarm for the hull structure if the hull structure is determined to be in a high-risk state.

7. A hull structure condition monitoring device, wherein the hull structure condition monitoring device is used to implement the method according to any one of claims 1-6, characterized in that, The device includes: an external force determination module for determining the external force on the hull structure within a preset first time period; a crack determination module for determining microcracks that have appeared in the hull structure when the external force does not exceed a preset threshold; a time evaluation module for evaluating the maintenance time of the hull structure based on the fatigue crack propagation rate of the microcracks that have appeared in the hull structure; and an alarm issuance module for determining that the hull does not meet navigation standards, the hull power equipment self-locks, and issuing an alarm indicating that the hull structure needs maintenance when the current time reaches the maintenance time of the hull structure.

8. A server, characterized in that, The system includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; the memory is used to store computer programs; and the processor, when executing the program stored in the memory, implements the steps of the method described in any one of claims 1-6.

9. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1-6.

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