CN114758281A - Fender device impact test method, device, equipment and medium - Google Patents
Fender device impact test method, device, equipment and medium Download PDFInfo
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- CN114758281A CN114758281A CN202210458155.4A CN202210458155A CN114758281A CN 114758281 A CN114758281 A CN 114758281A CN 202210458155 A CN202210458155 A CN 202210458155A CN 114758281 A CN114758281 A CN 114758281A
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Abstract
The embodiment of the application provides a fender device impact testing method, a fender device impact testing device, equipment and a medium, and belongs to the technical field of computers. The method comprises the following steps: collecting a video of the whole process of ship stopping and landing; intercepting a plurality of target pictures from the video; selecting a first picture from the multiple target pictures according to the time sequence as a reference picture, and taking the target pictures except the reference picture as comparison pictures; extracting a reference area in the reference picture and a comparison area in each comparison picture, wherein the reference area and the comparison area both comprise a mark area preset on the fender device; and determining a time-stress curve graph of the fender device in the whole process of the ship stopping and landing according to the reference area and the comparison area. The application saves the economic cost brought by installing a large-scale sensor, is not influenced by temperature and energy loss, and improves the precision of load measurement.
Description
Technical Field
The application relates to the technical field of computers, in particular to a fender device impact testing method, device, equipment and medium.
Background
The process of berthing the ship at the wharf is influenced by a plurality of factors such as wind conditions and waves of a port area, and the process needs the cooperation of a ship side and a wharf side, so that the technical proficiency of related personnel is tested. In recent years, with the prosperous development of shipping industry, the arrival frequency of ships at large ports is increasing. Due to the complexity of berthing operations, the incident of an uncontrolled berthing vessel colliding against the dock occurs at times. In order to reduce the collision force, a fender device is often arranged on the wharf, and is used for buffering the impact, protecting the wharf and the ship from collision and prolonging the service life of the wharf. The structural stress analysis of the impact effect of the fender device is a key theoretical link for evaluating the overall safety of the structure under the impact accidental working condition, and is also an important basic condition for subsequent structure repair.
At present, the existing method for measuring the impact force is mainly to directly receive the load brought by the ship through a force transducer arranged at a fender device. However, since the collision position of the ship against the dock cannot be predicted in advance, the cost of the sensor is high, and large-scale laying cannot be performed. In addition, the resistor adhered on the elastic sheet can generate temperature change during working, and the temperature change is fed back to the resistor to cause the resistance value of the resistor to change. Even with the temperature trimmer, the influence of the temperature trimmer cannot be eliminated. And loss is generated in the process of converting the external force into the electric signal and then converting the electric signal into the digital signal, so that the generated curve diagram error is large, and the measurement precision is low.
Therefore, how to solve the above problems is a problem that needs to be solved at present.
Disclosure of Invention
The application provides a fender device impact testing method, a fender device impact testing device, equipment and a medium, and aims to solve the problems.
In a first aspect, the application provides a fender device impact testing method, which includes: collecting a video of the whole process of stopping and landing a ship; intercepting a plurality of target pictures from the video; selecting a first picture from the multiple target pictures according to the time sequence as a reference picture, and taking the target pictures except the reference picture as comparison pictures; extracting a reference area in the reference picture and a comparison area in each comparison picture, wherein the reference area and the comparison area both comprise a mark area preset on the fender device; and determining a time-stress curve graph of the fender device in the whole process of the ship stopping and landing according to the reference area and the comparison area.
In a possible embodiment, the marker region comprises an array of speckles.
In a possible embodiment, said determining a time-stress curve of said fender device over the course of said ship stopping on the shore from said reference area and said comparison area comprises: calculating reference coordinates for each speckle in the reference region; calculating the comparison coordinate of each speckle in the comparison area in each comparison picture; respectively calculating a deformation displacement value between the comparison coordinate in each comparison picture and the corresponding reference coordinate; determining the loads borne by the fender device at different time points according to the deformation displacement values; and generating a time-stress curve graph of the fender device in the whole process of the ship stopping and landing according to the time sequence and the load.
In a possible embodiment, the method further comprises: acquiring a preset stress interval of the fender device; and determining the working state of the fender device according to the time-stress curve graph.
In a possible embodiment, the determining, according to the deformation displacement value, the loads borne by the fender device at different time points includes: acquiring a stiffness coefficient corresponding to the fender device; and multiplying the stiffness coefficient with each deformation displacement value respectively to obtain the load borne by the fender device at different time points.
In a possible embodiment, the capturing a video of the whole process of the ship stopping and landing comprises: and controlling a first camera and a second camera to acquire the video of the whole process of ship berthing, wherein the included angle between the first camera and the second camera is less than or equal to 15 degrees, and the first camera and the second camera are both right opposite to the fender device.
In a possible embodiment, the marked area is located in a central area of the reference picture and/or the comparison picture.
In a second aspect, the present application provides a fender device impact testing device, the device includes: the acquisition module is used for acquiring a video of the whole process of ship berthing; the image processing module is used for intercepting a plurality of target pictures from the video; the image screening module is used for selecting a first image from the target images according to the time sequence as a reference image and taking the target images except the reference image as comparison images; the characteristic extraction module is used for extracting a reference area in the reference picture and a comparison area in each comparison picture, and the reference area and the comparison area respectively comprise a mark area preset on the fender device; and the impact testing module is used for determining a time-stress curve graph of the fender device in the whole process of stopping and landing the ship according to the reference area and the comparison area.
In a third aspect, the present application provides an electronic device, including: a memory for storing executable instructions; a processor for implementing the fender device impact testing method according to any one of the first aspect when executing the executable instructions stored in the memory.
In a fourth aspect, the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processing apparatus, performs the steps of the fender device impact testing method according to any one of the first aspects.
According to the fender device impact testing method, the fender device impact testing device, the fender device impact testing equipment and the fender device impact testing medium, the fender device impact testing method, the fender device impact testing device, the equipment and the medium are characterized in that a video mode of the whole process that a ship stops on the shore is acquired, frames in the video are intercepted to obtain a plurality of target pictures, then reference pictures and comparison pictures are determined from the plurality of target pictures, and the time-stress curve graph of the fender device in the whole process that the ship stops on the shore is determined according to the reference areas and the comparison areas through extracting the mark areas of the reference pictures and the comparison pictures, so that the economic cost caused by the installation of large-scale sensors on the fender device is saved, the influence caused by temperature and energy loss is avoided, and the accuracy of load measurement is effectively improved. Meanwhile, the stress image with the instantaneous structure can be displayed for a user, the problem of difficulty in time-varying analysis is solved, and the observability is strong.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an electronic device according to a first embodiment of the present application;
FIG. 2 is a flow chart of a fender impact testing method according to a second embodiment of the present application;
fig. 3 is a functional block diagram of a fender device impact testing device according to a third embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
First embodiment
Fig. 1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application, and in the present application, an electronic device 100 for implementing an example of a fender device impact testing method and device according to an embodiment of the present application may be described by using the schematic diagram shown in fig. 1.
As shown in fig. 1, an electronic device 100 includes one or more processors 102, one or more memory devices 104, an image capture device 106, and an output device 108, which are interconnected via a bus system and/or other type of connection mechanism (not shown). It should be noted that the components and structure of the electronic device 100 shown in fig. 1 are only exemplary and not limiting, and the electronic device may have some of the components shown in fig. 1 and may also have other components and structures not shown in fig. 1, as desired.
The processor 102 may be a Central Processing Unit (CPU) or other form of processing unit having data processing capabilities and/or instruction execution capabilities, and may control other components in the electronic device 100 to perform desired functions.
It should be understood that the processor 102 in the embodiments of the present application may be a Central Processing Unit (CPU), and the processor may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 104 may include one or more computer program products that may include various forms of computer-readable storage media.
It should be appreciated that the storage 104 in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and direct bus RAM (DR RAM).
On which one or more computer program instructions may be stored that may be executed by processor 102 to implement the client functionality (implemented by the processor) in the embodiments of the application described below, and/or other desired functionality. Various applications and various data, such as various data used and/or generated by the applications, may also be stored in the computer-readable storage medium.
The image capturing device 106 may be a device, such as a camera, for capturing video of the whole process of the ship stopping and landing.
The output device 108 may be a display screen for outputting the time-stress curve chart, or may be a wireless sensing device for transmitting the time-stress curve chart to other terminals.
The second embodiment:
referring to a flow chart of a fender device impact testing method shown in fig. 2, the method specifically includes the following steps:
step S201, collecting the video of the whole process of stopping and landing the ship.
The whole process of ship berthing comprises the processes before berthing, during berthing and after berthing.
It will be appreciated that during docking, the vessel may impact the fender.
Alternatively, the fender means may be a rubber-like fender member.
As an embodiment, step S201 includes: and controlling a first camera and a second camera to acquire videos of the whole process that the ship stops on the shore, wherein an included angle between the first camera and the second camera is smaller than or equal to 15 degrees, and the first camera and the second camera are both right opposite to the fender device.
In the implementation process, the included angle of the two cameras is controlled to be smaller than or equal to 15 degrees, so that the collected video is more accurate, more accurate image data is improved, and finally the measured impact force is more accurate.
Step S202, a plurality of target pictures are intercepted from the video.
In one embodiment, a plurality of target pictures are cut from the video based on frames at predetermined intervals. For example, the predetermined interval frame may be 50 frames, wherein a time of 25 frames is one second.
Of course, in practical use, the predetermined interval frame may be larger than 50 frames, such as 60 or 100 frames. Or less than 50 frames, such as 25 frames. Here, the number of the carbon atoms is not particularly limited.
Step S203, selecting a first picture from the multiple target pictures according to the time sequence as a reference picture, and taking the target pictures except the reference picture as comparison pictures.
The time sequence refers to the time sequence when the video is collected, namely the sequence from the front to the back of the ship in the process of the ship landing.
For example, a first picture is selected from the target pictures according to the time sequence as a reference picture.
It should be understood that the first image herein refers to the first frame image at the beginning of the video.
Step S204, extracting a reference region in the reference picture and a comparison region in each comparison picture.
The reference area and the comparison area respectively comprise a mark area preset on the fender device.
Optionally, the marker region comprises an array of speckles.
It will be appreciated that the array of speckles is provided on the surface of the fender so that when a ship impacts the fender, the impact force can be measured through the displacement changes of the speckles. In addition, the measurement difficulty can be lower through array arrangement, so that the measurement accuracy is improved.
As an embodiment, the speckles may be uniformly marked with a matte black marker when the fender device is painted with white base and the surface of the fender device is polished to draw the speckles.
It should be understood that the speckle marking method described above is only one method of marking, and is not a condition for limiting the scope of the present application.
Optionally, the marked region is located in a central region of the reference picture and/or the comparison picture.
That is, the speckle plane should be as centered as possible in the frame.
As an embodiment, the pre-trained neural network model may be used to extract the labeled regions (i.e., the reference region and the comparison region) on each picture, which is not limited in this respect.
And S205, determining a time-stress curve graph of the fender device in the whole process of the ship stopping and landing according to the reference area and the comparison area.
The time-stress curve diagram is used for describing the stress (namely the borne load) process of the fender device along with the change of time in the process of landing of the ship.
It should be understood that the time here corresponds to the time of the comparison picture in the video.
For example, if a comparison picture is located at the 100 th frame (1 second per 25 frames) in the video and the video start time is t0, the comparison picture corresponds to time t0+4 seconds.
As an embodiment, step S205 includes: calculating reference coordinates for each speckle in the reference region; calculating the comparison coordinate of each speckle in the comparison area in each comparison picture; respectively calculating a deformation displacement value between the comparison coordinate in each comparison picture and the corresponding reference coordinate; determining the loads borne by the fender device at different time points according to the deformation displacement values; and generating a time-stress curve graph of the fender device in the whole process of the ship stopping and landing according to the time sequence and the load.
It should be understood that when calculating the deformation displacement value, a one-to-one comparison principle is followed, i.e. the coordinate of a certain speckle in the reference region is calculated with the comparison coordinate of the speckle in the comparison picture to obtain the deformation displacement value.
Optionally, respectively calculating a deformation displacement value between the comparison coordinate in each comparison picture and the corresponding reference coordinate, including: respectively calculating an initial deformation displacement value between each comparison coordinate in each comparison picture and the corresponding reference coordinate; and filtering the maximum value in the plurality of initial deformation displacement values, and averaging the rest initial deformation displacement values to obtain the deformation displacement value.
Of course, in actual use, all the initial deformation displacement values may be directly averaged without removing the maximum value, so as to obtain the deformation displacement value.
In a possible embodiment, the method further comprises: acquiring a preset stress section of the fender device; and determining the working state of the fender device according to the time-stress curve graph.
The preset stress interval can be set by a user based on the performance of the fender device.
In the implementation process, the working state of the fender device is determined, so that the fender device can be maintained in time when being abnormal, and the service life of the fender device and the safety coefficient of ships and docks are prolonged.
In a possible embodiment, the determining, according to the deformation displacement value, the loads borne by the fender device at different time points includes: acquiring a stiffness coefficient corresponding to the fender device; and multiplying the stiffness coefficient with each deformation displacement value respectively to obtain the load borne by the fender device at different time points.
In a possible embodiment, the method further comprises: determining the accuracy of the deformation displacement values.
Alternatively, the resulting deformation displacement value may be compared to the actual displacement to obtain the accuracy of the deformation displacement value.
It should be noted that the actual displacement may be actually measured in an auxiliary manner, for example, the actual displacement may be measured by a force applying device and a displacement meter.
In the embodiment, the method comprises the steps of acquiring a video of the whole process of ship berthing and berthing, intercepting frames in the video to obtain a plurality of target pictures, determining a reference picture and a comparison picture from the plurality of target pictures, and extracting the marked regions of the reference picture and the comparison picture, so that the time-stress curve graph of the fender device in the whole process of ship berthing and berthing is determined according to the reference region and the comparison region, thereby saving the economic cost caused by mounting a large-scale sensor on the fender device, being not influenced by temperature and energy loss, and effectively improving the precision of load measurement. Meanwhile, the stress image with the instantaneous structure can be displayed for a user, the problem of difficulty in time-varying analysis is solved, and the observability is strong.
The third embodiment:
referring to fig. 3, a fender impact testing apparatus 500 includes: an acquisition module 510, an image processing module 520, an image screening module 530, a feature extraction module 540, and an impact testing module 550.
The acquisition module 510 is used for acquiring videos of the whole process of stopping and landing a ship;
an image processing module 520, configured to capture multiple target pictures from the video;
an image filtering module 530, configured to select a first image from the multiple target images according to a time sequence as a reference image, and use the target images except the reference image as comparison images;
a feature extraction module 540, configured to extract a reference region in the reference picture and a comparison region in each comparison picture, where the reference region and the comparison region both include a mark region preset on the fender device;
and the impact testing module 550 is used for determining a time-stress curve graph of the fender device in the whole process of stopping and landing the ship according to the reference area and the comparison area.
It should be noted that, in order to avoid redundant description of the specific functions of the fender device impact testing device 500, reference is made to the description of the above method embodiment, and therefore, redundant description is not repeated herein.
Further, the present embodiment also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processing device, the computer program performs the steps of any one of the fender device impact testing methods provided by the above embodiments.
The computer program product of the impact testing method and device for the fender device provided by the embodiment of the application comprises a computer readable storage medium storing program codes, wherein instructions included in the program codes can be used for executing the method described in the foregoing method embodiment, and specific implementation can refer to the method embodiment, and is not described herein again.
It should be noted that the above embodiments may be wholly or partially implemented by software, hardware (e.g., circuit), firmware or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., infrared, wireless, microwave, etc.). The computer-readable 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., that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In addition, the "/" in this document generally indicates that the former and latter associated objects are in an "or" relationship, but may also indicate an "and/or" relationship, which may be understood with particular reference to the former and latter text.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply any order of execution, and the order of execution of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (10)
1. A fender impact testing method, characterized in that the method comprises:
collecting a video of the whole process of stopping and landing a ship;
intercepting a plurality of target pictures from the video;
selecting a first picture from the multiple target pictures according to the time sequence as a reference picture, and taking the target pictures except the reference picture as comparison pictures;
extracting a reference area in the reference picture and a comparison area in each comparison picture, wherein the reference area and the comparison area both comprise a mark area preset on the fender device;
and determining a time-stress curve graph of the fender device in the whole process of the ship stopping and landing according to the reference area and the comparison area.
2. The method of claim 1, wherein the marker region comprises an array of speckles.
3. The method of claim 2, wherein the determining a time-force profile of the fender device over the course of the ship docking according to the reference region and the comparison region comprises:
calculating reference coordinates for each speckle in the reference region;
calculating the comparison coordinate of each speckle in the comparison area in each comparison picture;
respectively calculating a deformation displacement value between the comparison coordinate in each comparison picture and the corresponding reference coordinate;
determining the loads borne by the fender device at different time points according to the deformation displacement values;
and generating a time-stress curve graph of the fender device in the whole process of the ship stopping and landing according to the time sequence and the load.
4. The method of claim 3, further comprising:
acquiring a preset stress interval of the fender device;
and determining the working state of the fender device according to the time-stress curve graph.
5. The method according to claim 3, wherein the determining the load on the fender device at different time points according to the deformation displacement value comprises:
acquiring a stiffness coefficient corresponding to the fender device;
and multiplying the stiffness coefficient with each deformation displacement value respectively to obtain the load borne by the fender device at different time points.
6. The method according to any one of claims 1 to 5, wherein the step of acquiring video of the whole process of ship berthing on the shore comprises the following steps:
and controlling a first camera and a second camera to acquire the video of the whole process of ship berthing, wherein the included angle between the first camera and the second camera is less than or equal to 15 degrees, and the first camera and the second camera are both right opposite to the fender device.
7. The method according to claim 6, wherein the marked region is located in a central region of the reference picture and/or the comparison picture.
8. A fender impact testing apparatus, the apparatus comprising:
the acquisition module is used for acquiring a video of the whole process of ship berthing;
the image processing module is used for intercepting a plurality of target pictures from the video;
the image screening module is used for selecting a first image from the target images according to the time sequence as a reference image and taking the target images except the reference image as comparison images;
the characteristic extraction module is used for extracting a reference area in the reference picture and a comparison area in each comparison picture, and the reference area and the comparison area both comprise a mark area preset on the fender device;
and the impact testing module is used for determining a time-stress curve graph of the fender device in the whole process of stopping and landing the ship according to the reference area and the comparison area.
9. An electronic device, comprising:
a memory for storing executable instructions;
a processor for implementing the fender device impact testing method according to any one of claims 1 to 7 when executing the executable instructions stored in the memory.
10. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when being executed by a processing device, carries out the steps of the fender assembly impact testing method according to any one of claims 1 to 7.
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| CN202210458155.4A CN114758281A (en) | 2022-04-28 | 2022-04-28 | Fender device impact test method, device, equipment and medium |
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