Abnormality detection device, method and equipment for ship propeller and medium

Abstract

The invention discloses an anomaly detection device, method and equipment for a ship propeller and a medium, and belongs to the technical field of ship propelling devices. The device comprises a target speed determination module used for calculating the target navigation speed of a ship according to the rotating speed data of a propeller of the ship, the self-weight data of the ship, the water flow data and the wind power data; the actual speed determination module is used for determining the actual navigation speed of the ship through the positioning data; and the defect abnormity identification module is used for generating inspection prompt information of propeller defects if the actual navigation speed is identified to be inconsistent with the target navigation speed. According to the technical scheme, whether the propeller is in a normal working state or not can be determined according to the collected environmental parameters and the working parameters of the propeller under the condition that the ship is not stopped, abnormity of the propeller is found, the abnormity type of the propeller is determined, workers are reminded to repair and maintain the propeller in time, and normal and stable operation of the ship is ensured.

Description

Technical Field

[0001] This application belongs to the technical field of ship propulsion devices, and particularly relates to an abnormal detection device, method, equipment and medium for ship propellers. Background Art

[0002] As a ship propulsion device, if the propeller is damaged, the normal operation of the ship will be seriously affected. During long-term use, the propeller may experience phenomena such as blade structure deformation, fracture, and cavitation, which seriously threaten the safety of ship navigation.

[0003] Currently, the abnormal detection of ship propellers is often carried out at fixed intervals and when the ship is docked, which may lead to a problem of inspection lag once an abnormality occurs. Moreover, the existing inspection methods mainly rely on manual inspection, which may result in missed inspections due to incomplete inspections and problems with inconsistent inspection standards due to subjective factors. Summary of the Invention

[0004] The objective of the embodiments of this application is to provide an abnormal detection device, method, equipment and medium for ship propellers, aiming to perform real-time detection on the ship propellers, help the staff promptly discover the abnormal conditions of the propellers, and perform professional maintenance operations based on different abnormal types to ensure the operating performance of the propellers.

[0005] In a first aspect, the embodiments of this application provide an abnormal detection device for ship propellers, the device includes:

[0006] A parameter data acquisition module, configured to acquire the ship's deadweight data, as well as the water flow data and wind force data during ship operation;

[0007] A target speed determination module, configured to read the rotational speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotational speed data, the ship's deadweight data, the water flow data, and the wind force data;

[0008] An actual speed determination module, configured to determine the actual navigation speed of the ship through positioning data;

[0009] A defect abnormality identification module, configured to generate an inspection prompt message for propeller defects if it is identified that the actual navigation speed does not match the target navigation speed.

[0010] In a second aspect, the embodiments of this application provide an abnormal detection method for ship propellers, the method includes:

[0011] Acquire the ship's deadweight data, as well as the water flow data and wind force data during ship operation;

[0012] Read the rotational speed data of the propeller of the ship, and calculate the target sailing speed of the ship according to the rotational speed data, the ship's own weight data, the water flow data, and the wind force data;

[0013] Determine the actual sailing speed of the ship through positioning data;

[0014] If it is recognized that the actual sailing speed does not match the target sailing speed, a check prompt message for propeller defects is generated.

[0015] In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the method described in the second aspect are implemented.

[0016] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the second aspect are implemented.

[0017] In a fifth aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the second aspect.

[0018] In the embodiment of the present application, a parameter data acquisition module is used to acquire the ship's own weight data, the water flow data, and the wind force data during the ship's operation; a target speed determination module is used to read the rotational speed data of the propeller of the ship, and calculate the target sailing speed of the ship according to the rotational speed data, the ship's own weight data, the water flow data, and the wind force data; an actual speed determination module is used to determine the actual sailing speed of the ship through positioning data; a defect anomaly recognition module is used to generate a check prompt message for propeller defects if it is recognized that the actual sailing speed does not match the target sailing speed. Through the above abnormal detection method of the ship propeller, it is possible to determine whether the propeller is in a normal working state, detect propeller anomalies and determine their anomaly types, and timely remind the staff to repair and maintain the propeller according to the collected environmental parameters and propeller working parameters without stopping the ship, ensuring the normal and stable operation of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an abnormal detection device for a ship propeller provided in Embodiment 1 of the present application;

[0020] Figure 2 is a schematic structural diagram of an abnormal detection device for a ship propeller provided in Embodiment 2 of the present application;

[0021] Figure 3 It is a schematic structural diagram of the abnormal detection device for a ship propeller provided in Embodiment 3 of the present application;

[0022] Figure 4 It is a schematic structural diagram of the abnormal detection device for a ship propeller provided in Embodiment 4 of the present application;

[0023] Figure 5 It is a schematic structural diagram of the abnormal detection device for a ship propeller provided in Embodiment 5 of the present application;

[0024] Figure 6 It is a schematic structural diagram of the abnormal detection device for a ship propeller provided in Embodiment 6 of the present application;

[0025] Figure 7 It is a schematic flowchart of the abnormal detection method for a ship propeller provided in Embodiment 7 of the present application;

[0026] Figure 8 It is a schematic structural diagram of the electronic device provided in Embodiment 8 of the present application. Detailed implementation manners

[0027] In order to make the objectives, technical solutions, and advantages of the present application clearer, the following further describes the specific embodiments of the present application in detail with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the sake of description, only parts related to the present application are shown in the drawings rather than all the content. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of the operations can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. When the operations are completed, the process can be terminated, but there can also be additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0028] The following will clearly describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0029] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0030] The following will combine the accompanying drawings and through specific embodiments and their application scenarios to elaborate in detail on the abnormal detection device, method, equipment and medium for ship propellers provided by the embodiments of this application.

[0031] Embodiment 1

[0032] Figure 1 It is a schematic structural diagram of an abnormal detection device for a ship propeller provided by Embodiment 1 of this application.

[0033] As Figure 1 shown, the device includes:

[0034] A parameter data acquisition module 110, configured to acquire the ship's deadweight data, as well as the water flow data and wind force data during the ship's operation;

[0035] A target speed determination module 120, configured to read the rotational speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotational speed data, the ship's deadweight data, the water flow data, and the wind force data;

[0036] An actual speed determination module 130, configured to determine the actual navigation speed of the ship through positioning data;

[0037] A defect abnormality identification module 140, configured to generate a check prompt message for propeller defects if it is identified that the actual navigation speed does not match the target navigation speed.

[0038] This application is applicable to the scenario of real-time abnormal detection of ship propellers by collecting environmental data and propeller working data without affecting the normal navigation of the ship.

[0039] Based on the above usage scenario, it can be understood that the execution subject of this application can be an intelligent terminal device for real-time abnormal detection, such as a desktop computer, a laptop computer, a mobile phone, a tablet computer, and an interactive multimedia device, etc., which is not limited here.

[0040] The parameter data acquisition module 110 may be composed of a current meter, an anemometer, and a microprocessing chip of a computer, etc., and is used to acquire the ship's deadweight data, as well as the water flow data and wind force data during the ship's operation.

[0041] The ship's deadweight data may be the mass value of the entire ship, and the unit may be ton (t). The water flow data may be the flow velocity value of the water flow where the ship is located. Specifically, it may be the distance that the water quality point moves within a unit time, and its unit may be kilometer per hour (km / h). The wind force may be the magnitude of the force exerted by the wind on the ship, which is divided into 13 levels in total, with the minimum being level 0 and the maximum being level 12. The wind force data may be represented by the wind speed data, that is, the value of the air flow velocity in the ship's surrounding environment, and the unit may be kilometer per hour (km / h).

[0042] The method for acquiring the ship's deadweight data may be to find the light ship displacement recorded by the staff during the factory inspection of the ship, and the above light ship displacement is the ship's deadweight data. It can be understood that the ship's deadweight here may be the ship's weight obtained according to the displacement under the condition of the ship being empty or fully loaded. The light ship displacement may be the mass of the water of the same volume displaced by the ship when it is not loaded with any personnel and objects. The method for acquiring the water flow data may be to insert a current meter into the water flow to measure the flow velocity of the water flow. The current meter may be an instrument used to measure the fluid velocity. The method for acquiring the wind force data may be to insert an anemometer into the air outside the ship's cabin to measure the wind speed. The anemometer may be an instrument that compresses the air flow by using a rotating blade and detects the flow rate of the compressed air through a sensor.

[0043] The target speed determination module 120 may be composed of a propeller tachometer or a propeller rotation sensor and a microprocessing chip of a computer, etc., and is used to read the rotation speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotation speed data, the ship's deadweight data, the water flow data, and the wind force data.

[0044] The rotation speed data may be the number of self-rotation circles of the ship's propeller within a unit time, and the unit may be revolutions per second (r / s). The target navigation speed may be the ideal moving speed calculated according to the rotation speed data of the ship's propeller, the ship's deadweight data, the water flow data, and the wind force data, and the unit may be kilometer per hour (km / h).

[0045] The method of reading the rotational speed data can be measured by devices such as a propeller tachometer or a propeller speed sensor. The propeller tachometer can be a mechanical instrument that directly measures the rotational speed of the propeller. The propeller speed sensor can be an electronic device that measures the rotational speed of the propeller by sensing the electromagnetic field around the propeller. These devices are usually installed in the control room or the cockpit of the ship so that the staff can monitor the rotational speed of the propeller at any time.

[0046] The method of calculating the target navigation speed can be calculated by using the speed calculation model program in the computer. The calculation steps of the speed calculation model include: calculating the water flow resistance according to the water flow data; calculating the wind resistance according to the wind data; calculating the propulsion force of the ship according to the rotational speed data of the ship's propeller and the ship's own weight data; calculating the target navigation speed according to the above water flow resistance, wind resistance and propulsion force, and the calculation formula is as follows:

[0047]

[0048] Among them, represents the influence of the propulsion force on the speed; represents the influence of the ship's own weight on the speed; represents the influence of the water flow resistance on the speed; represents the influence of the wind resistance on the speed.

[0049] The actual speed determination module 130 can be composed of a microprocessor chip of a computer, etc., and is used to determine the actual navigation speed of the ship through the positioning data.

[0050] The positioning data can be the coordinates of the ship in the geocentric coordinate system used by the GPS positioning system. The positioning data can be obtained by using the ship's GPS receiver to receive the signals sent by multiple GPS satellites, and calculating the distances from the ship to each GPS satellite according to the time difference between the sending time and the receiving time of each signal. The actual navigation speed can be the positioning movement speed of the ship, that is, the actual displacement distance of the ship's positioning per unit time, and the unit can be kilometers per hour (km / h). The method of determining the actual navigation speed can be to obtain the positioning data for the ship every 30 seconds or every 1 minute, and calculate the actual distance between the two positioning data, and finally calculate the actual navigation speed.

[0051] The defect and anomaly identification module 140 can be composed of a microprocessor chip of a computer, etc., and is used to generate a check prompt message for the propeller defect if it is identified that the actual navigation speed does not match the target navigation speed.

[0052] The inspection prompt information can be information that prompts the staff to repair and maintain the ship's propeller. Its content can include the type of propeller abnormality, as well as the water flow data, wind data, rotational speed data of the propeller, target sailing speed, and actual sailing speed of the ship during the above steps. For example, the display of the intelligent terminal device real-time displays the water flow data, wind data, rotational speed data of the propeller, target sailing speed, and actual sailing speed of the ship. When the target sailing speed and the actual sailing speed do not match, a prompt window pops up, and the speaker plays a prompt audio to prompt the staff in both visual and auditory aspects.

[0053] The method for identifying whether the actual sailing speed is consistent with the target sailing speed can be to define a Boolean parameter with an initial value of "yes" and a loop comparison program by the computer. When the ship is running, the actual sailing speed parameter and the target sailing speed parameter in the program are updated in real time and compared. When the actual sailing speed parameter and the target sailing speed parameter are inconsistent, the program jumps out of the loop and changes the Boolean parameter to "no".

[0054] In the example of this application, the parameter data acquisition module is used to acquire the ship's self-weight data, as well as the water flow data and wind data during the ship's operation; the target speed determination module is used to read the rotational speed data of the ship's propeller, and calculate the target sailing speed of the ship according to the rotational speed data, the ship's self-weight data, the water flow data, and the wind data; the actual speed determination module is used to determine the actual sailing speed of the ship through positioning data; the defect abnormality identification module is used to generate inspection prompt information for propeller defects if it is identified that the actual sailing speed does not match the target sailing speed. This technical solution can determine whether the propeller is in a normal working state, detect propeller abnormalities and determine their abnormal types without the ship stopping, and timely remind the staff to repair and maintain the propeller to ensure the normal and stable operation of the ship.

[0055] Embodiment 2

[0056] Figure 2 It is a schematic structural diagram of the abnormal detection device for the ship's propeller provided in Embodiment 2 of this application. This solution makes a better improvement to the above embodiment. The specific improvement is that the prompt information generation module includes: an abnormal type determination unit, which is used to determine the abnormal type of the propeller according to the speed difference information between the actual sailing speed and the target sailing speed if it is identified that the actual sailing speed does not match the target sailing speed; wherein, the abnormal types include fracture abnormality, bending abnormality, notch abnormality, and corrosion abnormality; a prompt information generation unit, which is used to generate inspection prompt information for propeller defects according to the abnormal type.

[0057] As shown Figure 2 below, the device includes:

[0058] A parameter data acquisition module 210, configured to acquire the deadweight data of the ship, as well as the water flow data and wind force data during the ship's operation;

[0059] A target speed determination module 220, configured to read the rotational speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotational speed data, the deadweight data of the ship, the water flow data, and the wind force data;

[0060] An actual speed determination module 230, configured to determine the actual navigation speed of the ship through positioning data;

[0061] A defect anomaly identification module 240, configured to generate a check prompt message for propeller defects if it is identified that the actual navigation speed does not match the target navigation speed.

[0062] Among them, the defect anomaly identification module 240 includes:

[0063] An anomaly type determination unit 2401, configured to determine the anomaly type of the propeller according to the speed gap information between the actual navigation speed and the target navigation speed if it is identified that the actual navigation speed does not match the target navigation speed; among them, the anomaly type includes fracture anomaly, bending anomaly, notch anomaly, and corrosion anomaly;

[0064] A prompt message generation unit 2402, configured to generate a check prompt message for propeller defects according to the anomaly type.

[0065] The speed gap information may be a value obtained by subtracting the actual navigation speed from the target navigation speed, such as -3 knots, +2 knots, +4 km / h, -5 km / h, etc.

[0066] The fracture anomaly of the ship's propeller refers to the situation where the propeller breaks or is damaged during navigation. The propeller is an important power device of the ship. If the propeller breaks or is damaged, it will cause the propulsion force of the ship to decrease or be completely lost, seriously affecting the driving and safety of the ship. The fracture anomaly of the propeller is usually caused by the following reasons:

[0067] Propeller quality problems: Due to reasons such as unqualified quality and improper manufacturing process, there are defects or material fatigue inside the propeller, and fractures or damages will occur after long-term use.

[0068] Propeller installation problems: Problems such as loose installation of the propeller and loose fastening bolts may also cause fracture anomalies of the propeller.

[0069] Ship collision: When a ship collides or runs aground during navigation, it may also cause the propeller to break abnormally.

[0070] If the propeller breaks abnormally, the propulsion of the ship will be affected. The ship may lose control and even be in danger. Therefore, the crew must always pay attention to the working condition of the propeller, detect and repair potential problems in time to ensure the safe navigation of the ship.

[0071] The bending abnormality of the ship's propeller refers to the situation where the propeller is distorted or deformed during navigation. The propeller is an important propulsion device of the ship. Once the propeller shows bending abnormality, it will lead to a decrease in the ship's propulsion ability, a slower ship speed, and even affect the safe navigation of the ship. The bending abnormality of the propeller is usually caused by the following reasons:

[0072] Propeller quality problems: Reasons such as the propeller manufacturing material not meeting the standards and improper manufacturing process will cause the propeller to show bending abnormality during use.

[0073] Excessive force on the propeller: Environmental factors such as water flow and air flow acting on the propeller during navigation will exert force on the propeller. If the force on the propeller is too large, it may cause the propeller to show bending abnormality.

[0074] Propeller collision: When the ship passes through narrow waterways, ports and other areas during navigation, the propeller may collide with the bottom or other obstacles, which may also cause the propeller to show bending abnormality.

[0075] If the propeller shows bending abnormality, the propulsion ability of the ship will be affected. Measures must be taken in time for repair or replacement. Before navigation, the crew must check the condition of the propeller to ensure that it has no bending or other abnormal conditions to ensure the safe navigation of the ship.

[0076] The notch abnormality of the ship's propeller refers to the damage situation such as notches or scratches on the surface of the propeller. The propeller is an important propulsion device of the ship. If the propeller shows notch abnormality, it may cause problems such as unstable propeller operation, decreased propulsion force, and increased noise. In severe cases, it may even cause the propeller to break, threatening the safe navigation of the ship. The notch abnormality of the propeller is usually caused by the following reasons:

[0077] The propeller is collided or impacted by external objects: When the ship is navigating, if the propeller is collided or impacted by underwater obstacles, floating objects, etc., it may cause notch abnormality on the surface of the propeller.

[0078] Propeller quality problems: Reasons such as the propeller manufacturing material not meeting the standards and improper manufacturing process will cause notches or other damage on the surface of the propeller.

[0079] Propeller fatigue after long-term use: After long-term use of the propeller, due to the influence of environmental factors such as water flow and air flow during operation, there may also be abnormal notches.

[0080] If there are abnormal notches on the propeller, the crew must check and repair it in time to ensure the normal working condition of the propeller and guarantee the safe navigation of the ship. Before sailing, the crew must check whether there are notches or other abnormal conditions on the surface of the propeller to ensure the safe navigation of the ship.

[0081] Corrosion abnormality of the ship's propeller refers to the corrosion on the surface or inside of the propeller. Corrosion means that the metal surface reacts chemically with the surrounding environment, resulting in the loss and damage of the metal surface. The propeller is an important propulsion device of the ship. If there is corrosion abnormality on the propeller, it will lead to unstable working condition of the propeller, decreased propulsion force, slower ship speed, and even may cause the propeller to fail, posing a threat to the safe navigation of the ship. The corrosion abnormality of the propeller is usually caused by the following reasons:

[0082] Long-term immersion in seawater: Long-term immersion of the propeller in seawater easily causes corrosion on the surface or inside of the propeller.

[0083] Corrosion of the propeller surface covering: The propeller surface is covered with an anti-fouling coating or other chemical materials, and these materials may corrode due to long-term use or environmental factors, etc., resulting in abnormal corrosion on the propeller surface.

[0084] Water quality problems: If the water quality problems in the navigation waters are relatively serious, such as containing acidic substances or other harmful substances, it will also exacerbate the corrosion of the propeller.

[0085] If there is corrosion abnormality on the propeller, the crew must check and repair it in time to ensure the normal working condition of the propeller and guarantee the safe navigation of the ship. Before sailing, the crew must check whether there is corrosion, wear or other abnormal conditions on the surface of the propeller. For propellers with relatively serious corrosion, anti-corrosion measures should be taken, such as regular cleaning, spraying anti-corrosion coatings, etc.

[0086] In this solution, the type of propeller abnormality can be determined by the difference between the target speed and the actual speed of the ship. For example, through experiments, it is obtained that when the hull propeller breaks abnormally, the actual navigation speed will have a large difference from the target navigation speed. For example, when the navigation speed of the ship reaches 50 km / h, the difference between the actual navigation speed and the target navigation speed can reach -7.5 km / h, or more. Then, when the above speed difference information is satisfied, it can be determined that there is a propeller break abnormality. For the case of propeller notch abnormality, its manifestation in terms of speed difference information will be much smaller. For example, when the navigation speed of the ship reaches 50 km / h, the difference between the actual navigation speed and the target navigation speed can reach -2.5 km / h, or less.

[0087] For bending abnormality and corrosion abnormality, they will cause the rotation speeds of multiple propellers of the hull to be inconsistent. There is not much numerical difference between the actual navigation speed and the target navigation speed, but there will be a difference in the direction of the speed. For example, originally sailing due north, because there is a bending abnormality in the right propeller, the hull sails in the direction of 3.5° east of north. Or because there is a corrosion abnormality in the left propeller, the lateral resistance it brings is greater at the same rotation speed, forming a lateral drag force, resulting in a left deviation of the course. Furthermore, it can be determined which of the two abnormalities, bending abnormality and corrosion abnormality, caused the deviation based on the sailing trajectory.

[0088] The method of generating inspection prompt information can generate corresponding communication information based on the number of the abnormality type and provide it to the corresponding staff through wired or wireless means. After receiving this information, the staff can carry out targeted processing for the corresponding abnormality type, such as performing corrosion resistance treatment on the propeller through electrochemistry reaction, etc.

[0089] The advantage of this technical solution is that it can determine the type of hull propeller abnormality based on the speed difference information and make corresponding treatments according to the abnormality type, which can improve the work efficiency of the staff, and at the same time avoid the subjective error caused by the subjective evaluation of the staff, and improve the safety of the ship during navigation.

[0090] Embodiment III

[0091] Figure 3It is a schematic structural diagram of an abnormal detection device for a ship propeller provided in Embodiment 3 of the present application. This solution makes a better improvement to the above embodiment. The specific improvement is as follows: The abnormal type determination unit is specifically configured to: obtain at least one predetermined specific speed value; when the target navigation speed is the specific speed value, subtract the obtained actual navigation speed from the target navigation speed to obtain speed difference information; determine the abnormal type of the propeller according to the speed difference information obtained at at least one specific speed value.

[0092] As Figure 3 shown, the device includes:

[0093] A parameter data acquisition module 310, configured to acquire the ship's own weight data and the water flow data and wind force data during the ship's operation;

[0094] A target speed determination module 320, configured to read the rotation speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotation speed data, the ship's own weight data, the water flow data, and the wind force data;

[0095] An actual speed determination module 330, configured to determine the actual navigation speed of the ship through positioning data;

[0096] A defect abnormality identification module 340, configured to generate a check prompt message for propeller defects if it is identified that the actual navigation speed does not match the target navigation speed.

[0097] Among them, the defect abnormality identification module 340 includes:

[0098] An abnormal type determination unit 3401, configured to determine the abnormal type of the propeller according to the speed difference information between the actual navigation speed and the target navigation speed if it is identified that the actual navigation speed does not match the target navigation speed; where the abnormal type includes fracture abnormality, bending abnormality, notch abnormality, and corrosion abnormality;

[0099] A prompt message generation unit 3402, configured to generate a check prompt message for propeller defects according to the abnormal type.

[0100] Among them, the abnormal type determination unit 3401 is specifically configured to: obtain at least one predetermined specific speed value; when the target navigation speed is the specific speed value, subtract the obtained actual navigation speed from the target navigation speed to obtain speed difference information; determine the abnormal type of the propeller according to the speed difference information obtained at at least one specific speed value.

[0101] The specific speed value can be a speed value used to determine the type of anomaly. For example, a certain speed range within which the type of anomaly of the propeller can be determined. The method of obtaining the specific speed value can be through experiments or theoretical model calculations to determine in which speed range each type of anomaly shows a distinguishable difference in speed compared to other types of anomalies. For example, for a fracture anomaly, the speed difference formed between 50 km / h and 70 km / h is relatively large, while the speed differences formed by other types of anomalies in this range are relatively small. Then, a range can be determined, or a value, such as 60 km / h, can be selected as the specific speed value. Similarly, the specific speed values corresponding to other types of anomalies can be determined.

[0102] The speed difference information can be the difference between the actual navigation speed and the target navigation speed. This difference can be a numerical difference or a vector difference. The method of obtaining the speed difference information can be to input two variables into a preset calculation formula, and then the speed difference information can be obtained.

[0103] Here, the specific speed value can be one or multiple. For example, at a certain speed value V1, the performances of the four types of anomalies in terms of speed difference information are all distinct from each other. Then, one specific speed value can be used to determine the type of anomaly. If only one type of anomaly can be distinguished at V1, when other types of anomalies need to be distinguished, V2 and V3 may be needed for assistance. The method of determining the type of anomaly can be to determine the specific speed value corresponding to the type of anomaly. For example, when there is a notch anomaly in the propeller, its performance in terms of speed difference information is different from the other three types of anomalies at V2. Then, it can be determined as a notch anomaly. Thus, even when the type of anomaly is unknown, the type of anomaly can be gradually determined based on the speed difference information obtained by selecting different specific speed values.

[0104] The advantage of this technical solution is that different specific speed values can be determined in advance to accurately judge various different types of anomalies. In addition, it can also be used to judge the situation where multiple anomalies occur simultaneously. In this way, the type of anomaly can be accurately determined without the need for on-site inspection by the staff, providing an accurate data basis for subsequent maintenance work.

[0105] Embodiment 4

[0106] Figure 4It is a schematic structural diagram of an abnormal detection device for a ship propeller provided in Embodiment 4 of the present application. This solution makes a better improvement to the above embodiment. The specific improvement is as follows: The abnormal type determination unit is specifically used for: when the propeller has breakage abnormality, bending abnormality, notch abnormality, and corrosion abnormality respectively, collecting the comparison record result of the actual navigation speed and the target navigation speed; according to the comparison record result, determining the speed value of the target navigation speed that has a differential manifestation among different abnormalities as a specific speed value.

[0107] As Figure 4 shown, the device includes:

[0108] A parameter data acquisition module 410, configured to acquire the ship's own weight data and the water flow data and wind force data during the ship's operation;

[0109] A target speed determination module 420, configured to read the rotation speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotation speed data, the ship's own weight data, the water flow data, and the wind force data;

[0110] An actual speed determination module 430, configured to determine the actual navigation speed of the ship through positioning data;

[0111] A defect abnormality identification module 440, configured to generate an inspection prompt message for the propeller defect if it is identified that the actual navigation speed does not match the target navigation speed.

[0112] Among them, the defect abnormality identification module 440 includes:

[0113] An abnormal type determination unit 4401, configured to determine the abnormal type of the propeller according to the speed difference information between the actual navigation speed and the target navigation speed if it is identified that the actual navigation speed does not match the target navigation speed; among them, the abnormal type includes breakage abnormality, bending abnormality, notch abnormality, and corrosion abnormality;

[0114] A prompt message generation unit 4402, configured to generate an inspection prompt message for the propeller defect according to the abnormal type.

[0115] Among them, the abnormal type determination unit 4401 is specifically used for: when the propeller has breakage abnormality, bending abnormality, notch abnormality, and corrosion abnormality respectively, collecting the comparison record result of the actual navigation speed and the target navigation speed; according to the comparison record result, determining the speed value of the target navigation speed that has a differential manifestation among different abnormalities as a specific speed value.

[0116] The comparison record result can be a data table used to record various anomalies. In this data table, the impacts of various anomalies on the actual navigation speed at different speeds can be recorded, and the current actual target speed can be recorded, so as to calculate the difference to determine different types of comparison record results.

[0117] The method of collecting the comparison record result can be the method of inputting by combining a computer with a speed sensor. Using this method can avoid the errors caused by manual input by staff, and at the same time reduce the dependence on staff in the process of generating the comparison record result.

[0118] Combined with the above example, the differential manifestation can be used to reflect the greatest difference in the manifestation of different anomaly types at which speed value. For example, at V1, among the four anomaly types, only the fracture anomaly is the most prominent in terms of speed difference information. For example, the difference between the actual navigation speed and the target navigation speed can reach -7.5 km / h, and the other anomaly types are all between -3 km / h and 0 km / h. Then it can be determined that V1 is the speed value of the target navigation speed at which there is a differential manifestation between different anomalies as a specific speed value. Similarly, at V2, V3 and V4 can be further determined.

[0119] The advantage of setting the present technical solution in this way is that multiple specific speed values can be obtained through experiments or mathematical model calculations, which can help to judge whether there are anomalies in the propeller during actual navigation and the anomaly types in case of anomalies.

[0120] Embodiment Five

[0121] Figure 5 It is a structural schematic diagram of an abnormal detection device for a ship propeller provided by Embodiment Five of the present application. This solution makes a better improvement to Embodiment One. The specific improvement is that the target speed determination module is specifically used to: input the rotation speed data, the ship self-weight data, the water flow data, and the wind force data into a speed calculation model, and determine the target navigation speed according to the output result of the speed calculation model.

[0122] As Figure 5 shown, the device includes:

[0123] A parameter data acquisition module 510, which is used to acquire the ship self-weight data and the water flow data and wind force data during the operation of the ship;

[0124] A target speed determination module 520, which is used to read the rotation speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotation speed data, the ship self-weight data, the water flow data, and the wind force data;

[0125] An actual speed determination module 530 for determining the actual navigation speed of the ship through positioning data;

[0126] A defect anomaly identification module 540 for generating a check prompt message for propeller defects if it is identified that the actual navigation speed does not match the target navigation speed.

[0127] Among them, the target speed determination module 520 is specifically configured to: input the rotation speed data, the ship's own weight data, the water flow data, and the wind force data into a speed calculation model, and determine the target navigation speed according to the output result of the speed calculation model.

[0128] The speed calculation model can be obtained in advance through training or parameter design, and is a model for calculating the theoretical navigation speed of the ship according to input parameters. The output result of this model can be the specific value of the target navigation speed. In this solution, variables can be set, and the values of each variable can be obtained by data reading or manual entry by staff, and the values are input into the speed calculation model.

[0129] The following is a simple example code demonstrating how to input the rotation speed data, the ship's own weight data, the water flow data, and the wind force data into the speed calculation model, and determine the target navigation speed according to the output of the model.

[0130]

[0131]

[0132] The advantage of setting this technical solution is that by using the speed calculation model, various information in the ship operation environment can be combined to accurately determine the theoretical navigation speed during the ship's navigation. Furthermore, based on this, the magnitude of the deviation of the ship's current actual navigation speed can be determined to determine whether there are defects in the propeller.

[0133] Embodiment Six

[0134] Figure 6 is a schematic structural diagram of an abnormal detection device for a ship propeller provided in Embodiment Six of the present application. This solution makes a better improvement to Embodiment One. The specific improvement is that the device further includes: a power compensation coefficient calculation module for calculating the power compensation coefficient of the ship at different target navigation speeds according to the actual navigation speed and the target navigation speed; a power control module for providing the power compensation coefficient to the power system of the ship propeller to control the propeller.

[0135] As Figure 6 shown, the device includes:

[0136] A parameter data acquisition module 610, configured to acquire the deadweight data of the ship, as well as the water flow data and wind force data during the operation of the ship;

[0137] A target speed determination module 620, configured to read the rotational speed data of the propeller of the ship, and calculate the target navigation speed of the ship according to the rotational speed data, the deadweight data of the ship, the water flow data, and the wind force data;

[0138] An actual speed determination module 630, configured to determine the actual navigation speed of the ship through positioning data;

[0139] A defect anomaly identification module 640, configured to generate a check prompt message for propeller defects if it is identified that the actual navigation speed does not match the target navigation speed.

[0140] A power compensation coefficient calculation module 650, configured to calculate the power compensation coefficient of the ship at different target navigation speeds according to the actual navigation speed and the target navigation speed;

[0141] A power control module 660, configured to provide the power compensation coefficient to the power system of the ship's propeller to control the propeller.

[0142] The power compensation coefficient can be provided to the motor of the propeller or the fuel engine, so as to increase or decrease the rotational speed of the propeller, making the actual navigation speed of the ship consistent with the theoretical navigation speed. The method of calculating the power compensation coefficient can be calculated using a simulated data calculation model. For example, by inputting the current speed and the target speed, the output power of the motor of the propeller or the fuel consumption of the fuel engine can be output.

[0143] In this solution, specifically, the power compensation factor of the ship refers to a parameter considered in ship design to ensure sufficient propulsion force during ship navigation. It is the ratio of the thrust of the propeller to the output power of the turbine, and is usually used to evaluate whether the power of the ship's main engine is sufficient. When designing a ship, it is necessary to determine an appropriate power compensation coefficient according to the ship type and speed requirements of the ship to achieve ideal navigation performance.

[0144] The following is a simple example code demonstrating how to calculate the power compensation coefficient of a ship at different target navigation speeds based on the actual navigation speed and the target navigation speed.

[0145]

[0146] The power system can be a system that provides power for the rotation of the propeller, such as an electric motor system or a fuel engine system. The way to provide the power compensation coefficient can be that after the computer calculates the corresponding value, it transmits this value to the control chip in the power system. By parsing this value, the control chip can obtain the target power and control the electric motor or fuel engine to work according to the target power. After the electric motor or fuel engine starts working according to the target power, the rotational speed of the propeller will be correspondingly reflected, such as an increase or decrease in rotational speed.

[0147] In a feasible embodiment, the staff can control the ship's propeller by operating the ship control system. Generally speaking, modern ships use an electronic control system to control the propeller. The staff can adjust the rotational speed and direction of the propeller by operating the console of the electronic control system, so as to control the actions of the ship such as moving forward, backward, and turning.

[0148] The advantage of setting the technical solution in this way is that by determining the power compensation coefficient, the ship can ensure stable operation in the case of abnormal propellers.

[0149] Embodiment Seven

[0150] Figure 7 It is a flowchart showing the abnormal detection method of the ship propeller provided in Embodiment Seven of the present application.

[0151] As Figure 7 shown, it specifically includes the following steps:

[0152] S701. Obtain the ship's self-weight data, water flow data, and wind force data during ship operation;

[0153] S702. Read the rotational speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotational speed data, the ship's self-weight data, the water flow data, and the wind force data;

[0154] S703. Determine the actual navigation speed of the ship through positioning data;

[0155] S704. If it is recognized that the actual navigation speed does not match the target navigation speed, generate a check prompt message for propeller defects.

[0156] In an embodiment of the present application, the deadweight data of the ship, as well as the water flow data and wind force data during the ship's operation, are acquired; the rotational speed data of the ship's propeller is read, and based on the rotational speed data, the deadweight data of the ship, the water flow data, and the wind force data, the target navigation speed of the ship is calculated; the actual navigation speed of the ship is determined through positioning data; if it is recognized that the actual navigation speed does not match the target navigation speed, a check prompt message for propeller defects is generated. Through the above abnormal detection method for the ship's propeller, according to the collected environmental parameters and propeller working parameters, it is possible to determine whether the propeller is in a normal working state without the ship stopping, detect propeller abnormalities and determine their abnormal types, and timely remind the staff to repair and maintain the propeller to ensure the normal and stable operation of the ship.

[0157] The abnormal detection method for the ship's propeller provided in the embodiment of the present application and the abnormal detection device based on the ship's propeller provided in the above embodiment have the same functional modules and beneficial effects. To avoid repetition, they will not be elaborated here.

[0158] Embodiment Eight

[0159] As Figure 8 shown, an embodiment of the present application further provides an electronic device 800, including a processor 801, a memory 802, a program or instruction stored on the memory 802 and executable on the processor 801. When the program or instruction is executed by the processor 801, it implements each process of the above embodiment of the abnormal detection device for the ship's propeller and can achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0160] It should be noted that the electronic device in the embodiment of the present application includes the above-mentioned mobile electronic device and non-mobile electronic device.

[0161] Embodiment Nine

[0162] An embodiment of the present application further provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, it implements each process of the above embodiment of the abnormal detection device for the ship's propeller and can achieve the same technical effects. To avoid repetition, they will not be elaborated here.

[0163] Among them, the processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs, etc.

[0164] Embodiment Ten

[0165] Another embodiment of the present application provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is configured to run programs or instructions to implement each process of the above-mentioned embodiment of the abnormal detection device for ship propellers, and can achieve the same technical effects. To avoid repetition, details are not described here again.

[0166] It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, system chip, chip system, or system-on-a-chip, etc.

[0167] It should be noted that in this text, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be pointed out that the methods and devices in the embodiments of the present application are not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0168] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions for causing a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present application.

[0169] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the spirit and scope protected by the claims of the present application, can still make many forms, all of which fall within the protection scope of the present application.

[0170] The above are only the preferred embodiments of the present application and the technical principles applied. The present application is not limited to the specific embodiments described herein. Various obvious changes, re-adjustments, and substitutions that can be made by those skilled in the art will not depart from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments. Without departing from the concept of the present application, more other equivalent embodiments can be included, and the scope of the present application is determined by the scope of the claims.

Claims

1. An abnormal detection device for a ship propeller, characterized in that, The device includes: A parameter data acquisition module, configured to acquire the deadweight data of the ship, as well as the water flow data and wind force data during the operation of the ship; A target speed determination module, configured to read the rotational speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotational speed data, the deadweight data of the ship, the water flow data, and the wind force data; An actual speed determination module, configured to determine the actual navigation speed of the ship through positioning data; A defect anomaly identification module, configured to generate a check prompt message for propeller defects if it is identified that the actual navigation speed does not match the target navigation speed.

2. The abnormal detection device for a ship propeller according to claim 1, wherein, The defect anomaly identification module includes: An anomaly type determination unit, configured to determine the anomaly type of the propeller according to the speed gap information between the actual navigation speed and the target navigation speed if it is identified that the actual navigation speed does not match the target navigation speed; wherein, the anomaly type includes fracture anomaly, bending anomaly, notch anomaly, and corrosion anomaly; A prompt message generation unit, configured to generate a check prompt message for propeller defects according to the anomaly type.

3. The abnormal detection device for a ship propeller according to claim 2, characterized in that, The anomaly type determination unit is specifically configured to: Obtain at least one predetermined specific speed value; When the target navigation speed is the specific speed value, calculate the difference between the obtained actual navigation speed and the target navigation speed to obtain the speed gap information; Determine the anomaly type of the propeller according to the speed gap information obtained at at least one specific speed value.

4. The abnormal detection device for a ship propeller according to claim 3, wherein, The anomaly type determination unit is specifically configured to: Collect the comparison record results of the actual navigation speed and the target navigation speed when the propeller has fracture anomaly, bending anomaly, notch anomaly, and corrosion anomaly respectively; According to the comparison record results, determine the speed value of the target navigation speed that has a differential manifestation among different anomalies as the specific speed value.

5. The abnormal detection device for a ship propeller according to claim 1, characterized in that, The target speed determination module is specifically configured to: Input the rotational speed data, the deadweight data of the ship, the water flow data, and the wind force data into a speed calculation model, and determine the target navigation speed according to the output result of the speed calculation model.

6. The abnormal detection device for a ship propeller according to claim 1, characterized in that The device further includes: A power compensation coefficient calculation module, configured to calculate the power compensation coefficient of the ship at different target navigation speeds according to the actual navigation speed and the target navigation speed; A power control module, configured to provide the power compensation coefficient to the power system of the ship's propeller to control the propeller.

7. An abnormal detection method for a ship propeller, characterized in that, The method includes: Acquire the deadweight data of the ship, as well as the water flow data and wind force data during the operation of the ship; Read the rotational speed data of the ship's propeller, and calculate the target navigation speed of the ship according to the rotational speed data, the deadweight data of the ship, the water flow data, and the wind force data; Determine the actual navigation speed of the ship through positioning data; If it is identified that the actual navigation speed does not match the target navigation speed, generate a check prompt message for propeller defects.

8. The abnormal detection method of a ship propeller according to claim 7, characterized in that, If it is identified that the actual navigation speed does not match the target navigation speed, generating a check prompt message for propeller defects includes: If it is recognized that the actual navigation speed does not match the target navigation speed, determine the abnormal type of the propeller according to the speed difference information between the actual navigation speed and the target navigation speed; wherein, the abnormal types include fracture abnormality, bending abnormality, notch abnormality, and corrosion abnormality; Generate inspection prompt information for propeller defects according to the abnormal type.

9. An electronic device, characterized in that, It includes a processor, a memory, and a program or instruction stored on the memory and executable on the processor. When the program or instruction is executed by the processor, the steps of the abnormal detection method for a ship propeller as described in any one of claims 7-8 are implemented.

10. A readable storage medium, characterized in that, A program or instruction is stored on the readable storage medium. When the program or instruction is executed by the processor, the steps of the abnormal detection method for a ship propeller as described in any one of claims 7-8 are implemented.

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