KR20170004559A - Waveform image analysis device for hull design verification of the vessel - Google Patents

Abstract

The present invention relates to a waveform image analysis device for verifying a hull design of a vessel, which is to determine adequacy of a hull design of a vessel currently sailing, by obtaining a waveform image in an actual vessel sailing situation and comparing the obtained waveform image with a model test image and an analysis result of computational fluid dynamics (CFD). The waveform image analysis device for verifying a waveform image of a sailing vessel includes: a photographing unit installed in the vessel and photographing waveforms when the vessel is sailing; and a waveform image analysis unit correcting the waveform image obtained by the photographing unit, comparing the corrected waveform image with the analysis result of the CFD, the model test image registered in advance, and the corrected waveform image, and outputting a comparison result as similarity for verifying the hull design of the vessel sailing.

Description

Technical Field [0001] The present invention relates to a waveform image analysis apparatus for hull design verification of a vessel,

The present invention relates to waveform image analysis for verifying a linear design of a ship, and more particularly, to a waveform image analysis method for acquiring a waveform image in an actual ship operating situation and analyzing the obtained waveform image with a model test image and CFD (Computational Fluid Dynamics) And more particularly to a waveform image analyzing apparatus for verifying linear design of a ship capable of judging appropriateness of a linear design of a ship currently in operation.

In the above, the waveform refers to the shape of the part where the ship meets the wave or the tide.

In the operation of offshore structures, ocean currents and tidal currents will inevitably exert internal and external forces on offshore structures. Especially, it is essential to control the marine fixed structures that are moored for long periods at certain points in the ocean to minimize the effects of currents and tidal currents. to be.

For ships under sailing, the effects of waves, tides, and winds are different depending on the shape of the hull, which in turn changes the efficiency of the ship. Therefore, when the hull shape is badly influenced by waves, algae, and wind, the efficiency of ship operation is adversely affected, and the fuel consumption rate of the ship is increased and the operation cost of the ship is increased.

In addition, it is urgent to solve the problem of overturning of ships or collapse of shipments due to external force and hull stress in hydrodynamic environments during the operation of offshore structures.

These problems and forecasts of linear design before shipbuilding to minimize the influence of offshore structures, especially ships, by ocean currents and tidal currents. And builds the ship on the basis of the predicted linear design.

Conventional technologies for detecting and analyzing offshore structures and ocean-related information and applying them to the safe operation and maintenance of offshore structures are disclosed in the following Patent Documents 1 to 3.

The prior art disclosed in Patent Document 1 includes a user terminal device that requests specific ocean information analysis or visualization corresponding to a user operation; A maritime information analyzing device for collecting marine observation information from one or more marine observation equipment in response to the request, performing marine information analysis based on the collected observation information, and a marine information analyzing device for receiving and displaying the marine information analysis result from the analyzing device It is equipped with a visualization device and supports marine fusion research to remote marine experts based on cloud computing.

The prior art disclosed in Patent Document 2 is to measure the internal and external forces using a flight time method in the actual navigation of an offshore structure and form a database to look at data on the internal and external forces applied to the offshore structures - Up table. Based on the stored information, the change in inclination, draft, corrosion, erosion, crack, pressure, stress, vibration, frequency, etc. applied to the suspended body of the ocean due to external force in the gas- Control structures to provide fuel savings, safe operation and maintenance information.

The prior art disclosed in Patent Document 3 is to measure the internal and external forces using a flight time method in the actual navigation of an offshore structure and form a database to look at data on the internal and external forces applied to the offshore structure obtained through linear test in a water tank - Up table. Based on the stored information, the change in inclination, draft, corrosion, erosion, crack, pressure, stress, vibration, and frequency applied to the suspended matter of the ocean due to external force in the hydrodynamic environment is measured synthetically, Control structures to provide fuel savings, safe operation and maintenance information.

Korean Patent Publication No. 10-2014-0047980 (published April 24, 2014) Korean Patent Publication No. 10-2013-0135137 (Dec. 10, 2013) Korean Patent Laid-Open No. 10-2013-0135138 (Dec. 10, 2013)

However, since the conventional technique as described above measures the performance of the solid line using only the sensor information provided on the ship, corrects the measured value, and verifies the flight performance by comparing with the model test and the CFD analysis result, It lacked accuracy to apply to design predictions.

Especially, since the navigation performance of the ship is verified using only the sensor information, there is a lack of accuracy and feedback on the linear design of the ship is impossible.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and apparatus for acquiring a waveform image in an actual ship navigation situation and transmitting the acquired waveform image to a model test image and a computational fluid dynamics The present invention provides a waveform image analyzing apparatus for verifying a linear design of a ship, which is capable of judging the suitability of a linear design of a ship currently operating in comparison with an analysis result.

In order to achieve the above object, a waveform image analyzing apparatus for verifying a linear design of a ship according to the present invention comprises: photographing means installed on a ship for photographing a waveform at the time of ship operation; A waveform image obtained by correcting the waveform image obtained by the photographing means, comparing the corrected waveform image with the pre-registered model test image and the CFD analysis result, and outputting the comparison result as similarity for linear design verification of the ship in operation And the like.

The waveform image analyzing apparatus for verifying the linear design of a ship according to the present invention may further include a photographing means mounting unit for mounting the photographing means on the ship.

Wherein the photographing means mounting portion comprises: a post fixed to the ship; An angle adjusting unit coupled to one end of the post and adjusting an angle of photographing of the photographing unit; And a camera support portion coupled to an end of the angle adjusting portion to fix the photographing means.

Wherein at least one photographing means is provided on the operating vessel.

The waveform image analyzing apparatus for verifying the linear design of a ship according to the present invention is interposed between the photographing means and the waveform image analyzing unit and collects the waveform image photographed by the photographing means and transmits the collected waveform image to the waveform image analyzing unit And a network for transmitting the photographing means control signal generated by the waveform image analyzing unit to the photographing means.

The waveform image analyzing apparatus for verifying the linear design of a ship according to the present invention further comprises a display device for displaying the similarity on the screen, which is the analysis result outputted from the waveform image analyzing unit.

The waveform image analyzing unit includes a camera controller for controlling the photographing operation, enlargement and reduction of the photographing means based on the user's operation information through the input device, and collecting the waveform image photographed by the photographing means do.

The waveform image analyzing unit may include an image processor for correcting the waveform image collected by the camera controller; An image comparing unit comparing the waveform image of the ship operated by the image processing unit with the pre-registered model test image and the CFD analysis result and outputting the comparison result; And an analysis result output unit for outputting the comparison result output from the image comparison unit as a similarity degree for linear design verification of the ship.

The image processing unit includes a video input module receiving a waveform image output from the camera controller; A noise detection module for detecting noise from a waveform image input through the image input module or a waveform image of the entire ship; And a noise removal module for removing the noise detected by the noise detection module, wherein the noise includes at least one of cloudy image, water droplet, and mist.

The image processing unit may further include an image combining module that combines the partial waveform images of the ship obtained from the respective photographing units output from the camera controller to convert the partial waveform images of the ship into waveform images of the entire ship.

The image comparison unit may include a video input module receiving a waveform image of the ship being output from the image processing unit; A comparison information storage module for storing a model test image and a CFD analysis result for verifying a waveform image of the ship; The image comparing module compares the waveform image of the ship and the model test image stored in the comparison information storage module and outputs the result.

The image comparison module compares the waveforms of the waveform image of the ship and the model test image and outputs the result as the shape similarity value of the waveform.

In the above, the image comparator compares the CFD analysis result of the derived vessel with the CFD analysis result stored in the comparison information storage module by performing the CFD analysis from the waveform image of the ship, derives the CFD analysis result, And a CFD comparison module for outputting the CFD comparison result.

In the above, the CFD comparison module compares the period and the amplitude of the waveform image.

The image comparing unit may further include an analysis result calculating module that calculates the similarity degree of the waveforms output from the image comparing module and the CFD comparing module, the periodicity and the amplitude similarity of the waveform, as a waveform image analysis result for verification of the linear design of the ship .

The analysis result calculation module calculates the image comparison result and the CFD comparison result as the numerical similarity value.

According to the present invention, there is an advantage that verification and feedback of the linear design of the ship currently operating can be performed by comparing the actual operation image with the model experiment and the CFD analysis model.

In addition, since it is possible to verify the linear design of the ship currently in operation, it can be used for ship operation, thereby improving the operational efficiency, thereby reducing the fuel cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic block diagram of a waveform image analyzing apparatus for verifying a linear design of a ship according to a preferred embodiment of the present invention;
FIG. 2 is a block diagram of an embodiment of the image processing unit of FIG.
FIG. 3 is a block diagram of an embodiment of the image comparing unit of FIG. 1;
FIG. 4A is a waveform image of a ship taken through a photographing means in the present invention,
FIG. 4B is a waveform image after correcting the waveform image of the ship obtained in FIG. 4A,
FIG. 5 is a diagram showing a comparison between a waveform image acquired in the present invention and a waveform image acquired in a model test. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A waveform image analyzing apparatus for verifying a linear design of a ship according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic block diagram of a waveform image analyzing apparatus for verifying a linear design of a ship according to a preferred embodiment of the present invention.

The waveform image analyzing apparatus for verifying the linear design of a ship according to the present invention includes a photographing means (20) and a waveform image analyzing unit (30).

In addition, the waveform image analyzing apparatus for verifying linear design of a ship according to the present invention may further include a photographing means mounting unit 10, a display device 40, and a network.

The photographing means 20 is installed on the ship 1 and photographs a waveform at the time of ship operation, and a normal camera can be used.

It is preferable that at least one such photographing means 20 is provided on the operating vessel. Particularly, it is preferable to install it on the left side, the right side, the stern, or the head of the ship.

The photographing means mounting portion 10 is for mounting the photographing means 20 on the ship 1 and comprises a post 11 fixed to the ship 1; An angle adjusting unit (12) coupled to one end of the post (11) and adjusting an angle of photographing of the photographing means (20); And a camera supporting part 13 coupled to an end of the angle adjusting part 12 for fixing the photographing device 20.

The waveform image analyzing unit 30 corrects the waveform image acquired by the photographing unit 20, compares the corrected waveform image with the pre-registered model test image and the CFD analysis result, And outputs the similarity for linear design verification.

The waveform image analyzing unit 30 controls the photographing operation, enlargement and reduction of the photographing means 20 based on the operation information of the user through an input device (not shown in the figure) A camera control unit 31 for collecting a waveform image photographed by the camera control unit 31; An image processor 32 for correcting the waveform image collected by the camera controller 31; An image comparing unit 33 for comparing the waveform image of the ship operated by the image processing unit 32 with the previously registered model test image and the CFD analysis result and outputting the comparison result; And an analysis result output unit 34 for outputting the comparison result value output from the image comparison unit 33 as a similarity degree for linear design verification of the ship 1.

Here, the image processing unit 32 includes a video input module 32a receiving a waveform image output from the camera control unit 31; A noise detection module 32b for detecting noise from the waveform image input through the image input module 32a or the waveform image of the entire ship; And a noise removing module 32c for removing the noise detected by the noise detecting module 32b. The noise includes at least one of cloudy image, water droplet, and mist.

The image processing unit 32 combines the partial waveform images of the ship 1 acquired from the respective photographing means 20 outputted from the camera control unit 31 to generate a video image And may further include a coupling module 32d.

The image comparison unit 33 includes a video input module 33a receiving a waveform image of the ship being output from the video processing unit 32; A comparison information storage module (33b) for storing a model test image and a CFD analysis result for verifying a waveform image of the ship; An image comparison module 33c for comparing the waveform image of the ship with the model test image stored in the comparison information storage module 33b and outputting the result; The CFD analysis result is derived from the waveform image of the operating vessel, the CFD analysis result is derived, the CFD analysis result of the derived vessel is compared with the CFD analysis result stored in the comparison information storage module 33b, and the result is output A CFD comparison module 33d; An analysis result calculation module 33e for calculating the shape similarity degree of the waveforms output from the image comparison module 33c and the CFD comparison module 33d and the periodicity and amplitude similarity degree of the waveform as the waveform image analysis results for verification of the ship's linear design, ).

The image comparison module 33c compares the waveform of the ship model and the model test image, and outputs the result as the shape similarity value of the waveform. The CFD comparison module 33d compares the waveform of the ship, , And the analysis module 33e may calculate the image comparison result and the CFD comparison result as the numerical similarity value.

In addition, the waveform image analyzing apparatus for linear design verification according to the present invention may further include a display device 40 for displaying the degree of similarity, which is the analysis result outputted from the waveform image analyzing unit 30, on the screen. The display device 40 may be implemented as a liquid crystal display device, a touch screen, or the like.

The waveform image analyzing apparatus for verifying the linear design of a ship according to the present invention includes a waveform image analyzing unit 20 interposed between the photographing unit 20 and the waveform image analyzing unit 30, To the waveform image analyzing unit 30 and transmitting the image capturing means control signal generated by the waveform image analyzing unit 30 to the image capturing means 20. Such networks can be implemented wired or wireless.

The operation of the waveform image analyzer for verifying the linear design of the ship according to the present invention will be described in detail as follows.

First, a photographing means 20 for photographing a waveform, which is a shape of a portion where a ship and a wave or an algae meet, is provided at a predetermined position of the ship 1. The number of the photographing means 20 is not limited, and it is preferable that the photographing means 20 is provided in a number for acquiring a waveform image of the entire ship.

The photographing means 20 is fixedly mounted on the ship 1 by using the photographing means mounting section 10 in order to mount the photographing means 20 at a predetermined position on the ship 1. [ For example, the post 11 is fixed to the ship 1, and one end of the post 11 and one end of the camera supporting part 13 are provided with an angle adjusting part 12 to adjust the angle of the photographing device 20 . Here, it is preferable to use a known length adjusting means or angle adjusting means capable of adjusting the length of the angle adjusting portion 12 and adjusting the photographing angle. By using the length adjusting means, the photographing means 20 can be moved to the outside of the hull, and a waveform image at a desired position can be obtained.

The manager controls the photographing means 20 through the input device connected to the waveform image analyzing section 30 in a state in which the photographing means 20 is installed on the ship 1.

The camera control unit 31 generates a control signal for controlling the photographing means and outputs the control signal to the photographing means 20 to the photographing means 20 through the input device . It is preferable that the photographing means control signal is transmitted to each photographing means through the network. When there are a plurality of photographing means, the photographing means is distinguished by using a unique number (ID) for each photographing means. Thus, a plurality of photographing means can be individually controlled.

The waveform image photographed by the photographing means 20 is transmitted to the waveform image analysis unit 30 through the network.

The waveform image received through the camera control unit 31 of the waveform image analysis unit 30 is transmitted to the image processing unit 32.

The image input module 32a of the image processing unit 32 receives the waveform image output from the camera control unit 31 and transmits the waveform image to the noise detection module 32b. The noise detection module 32b detects noise from the waveform image inputted through the image input module 32a or the waveform image of the entire ship. Here, the waveform image photographed from each photographing means is a waveform image for a part of the ship rather than the entire image of the ship. Therefore, it is possible to analyze the waveform image of a part of a ship, but sometimes it is also possible to analyze the waveform image of the entire ship. When the user (manager) requests the waveform image of the entire ship through the input device, the image combining module 32d combines the captured waveform image from each photographing means. The image combining is preferably performed using a conventional image combining technique. Here noise refers to shaken images, images with water droplets, fogged images, and so on. The noise can be detected by using a color value, a brightness value, or the like for each pixel. Since the noise detection method uses a well-known noise detection method in the image processing technique, a detailed description thereof will be omitted.

Next, when noise is detected by the noise detection module 32b, the noise removal module 32c removes noise from the waveform image including the noise to correct the waveform image. Here, the noise removal can use a noise filter used in an image processing technique. FIG. 4A is a waveform image obtained by photographing a ship being operated through a photographing means, and the waveform image is a combination of a waveform image photographed by each photographing means, in an image combining manner. 4A, reference numeral 41 denotes a fog, and reference numeral 42 denotes a water droplet. FIG. 4B shows a waveform image corrected by removing noise such as fog and water droplet from the waveform image.

The waveform image having the image corrected through the above process is transmitted to the image comparator 33.

The image input module 33a of the image comparison unit 33 receives the waveform image of the ship being operated by the image processing unit 32 and delivers the waveform image to the image comparison module 33c and the CFD comparison module 33d.

The image comparison module 33c compares the model test image for verifying the waveform image of the operating vessel with the waveform image of the ship and the model test image stored in the comparison information storage module 33b storing the CFD analysis result, . Here, the image comparison module 33c compares the waveforms of the waveform image of the ship and the model test image, and outputs the shape similarity value (%) of the waveform as a result.

Next, the CFD comparison module 33d derives the CFD analysis result from the CFD analysis from the waveform image of the running vessel, and compares the CFD analysis result of the derived vessel with the CFD analysis result stored in the comparison information storage module 33b The analysis result is compared, and the result is converted into a similarity value, and the result is output. Here, the CFD comparison module 33d preferably compares the period and the amplitude of the waveform image. Fig. 5 compares the waveform of the ship in operation with the model test image. Here, the portion expressed by the dotted line is the waveform image.

By comparing the shape of the waveform with the image through the waveform image and comparing the period and amplitude of the waveform, it can be confirmed whether the linear design prediction of the model test in the manufacturing of the ship is performed properly. This feedback of the linear design is possible, so that it can be utilized at the time of ship building later. In addition, by applying the results of the linear design verification on the operating vessel to the operating vessel, it is possible to improve the operational efficiency of the vessel. As a result, improved fuel efficiency can be achieved.

Meanwhile, the analysis result calculating module 33e calculates similarity values of the image comparison results obtained by the image comparison module 33c and the CFD comparison module 33d and the similarity values of the CFD comparison results to the connected display device 40 Display.

This allows the user to easily check the results of the linear design verification of the current ship.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The present invention is effectively applied to a technique for verifying the linear design of a ship in operation and for enhancing the efficiency of ship operation with the banner.

1: Ships
10:
20: photographing means
30: Waveform image analysis unit
31: Camera control unit
32:
32a: image input module
32b: Noise detection module
32c: Noise canceling module
32d: image combining module
33:
33a: image input module
33b: comparison information storage module
33c: Image comparison module
33d: CFD comparison module
33e: Analysis result calculation module
34: Output of analysis result
40: Display device

Claims (16)

An apparatus for verifying a waveform image of a ship,
A photographing means installed on the ship for photographing a waveform at the time of ship operation; And
A waveform image obtained by correcting the waveform image obtained by the photographing means, comparing the corrected waveform image with the pre-registered model test image and the CFD analysis result, and outputting the comparison result as similarity for linear design verification of the ship in operation And a waveform image analyzing device for verifying the linear design of the ship.
The apparatus according to claim 1, further comprising a photographing means mounting portion for mounting the photographing means on a ship.
The image pickup apparatus according to claim 2, wherein the photographing means mounting portion comprises: a post fixed to the ship; An angle adjusting unit coupled to one end of the post and adjusting an angle of photographing of the photographing unit; And a camera support unit coupled to an end of the angle adjusting unit to fix the photographing unit.
The apparatus according to claim 1 or 2, wherein at least one of the photographing means is provided in a navigation ship.
The image pickup apparatus according to claim 1, wherein the waveform image analyzing unit is interposed between the photographing unit and the waveform image analyzing unit, collects the waveform image photographed by the photographing unit and transfers the waveform image to the waveform image analyzing unit, And a network for transmitting the waveform image to the imaging means.
The waveform image analyzing apparatus according to claim 1, further comprising a display device for displaying the similarity as an analysis result output from the waveform image analyzing unit on a screen.
The waveform image analyzing unit includes a camera control unit for controlling the photographing operation, enlargement and reduction of the photographing unit based on the user's operation information through the input device, and collecting the waveform image photographed by the photographing unit And a waveform image analyzing device for verifying the linear design of the ship.
[14] The apparatus of claim 7, wherein the waveform image analyzer comprises: an image processor for correcting the waveform image collected by the camera controller; An image comparing unit comparing the waveform image of the ship operated by the image processing unit with the pre-registered model test image and the CFD analysis result and outputting the comparison result; Further comprising an analysis result output unit for outputting the comparison result output from the image comparison unit as similarity for linear design verification of the ship.
The image processing apparatus of claim 8, wherein the image processing unit comprises: a video input module receiving the waveform image output from the camera control unit; A noise detection module for detecting noise from a waveform image input through the image input module or a waveform image of the entire ship; And a noise removing module for removing the noise detected by the noise detecting module, wherein the noise includes at least one of cloudy image, water droplet, and mist. .
The image processing apparatus according to claim 9, wherein the image processing unit further includes an image combining module that combines the partial waveform images of the ship obtained from the respective photographing units output from the camera control unit to produce a waveform image of the entire ship. Waveform image analysis device for design verification.
The image comparison unit may include: a video input module receiving a waveform image of the ship being output from the image processing unit; A comparison information storage module for storing a model test image and a CFD analysis result for verifying a waveform image of the ship; And an image comparison module for comparing the waveform image of the navigation ship with the model test image stored in the comparison information storage module and outputting the resultant value.
[Claim 11] The image comparison module of claim 11, wherein the image comparison module compares waveforms of the waveform image of the ship and the model test image, and outputs the waveform shape similarity value as a result, .
The image comparing unit compares the CFD analysis result of the derived ship with the CFD analysis result stored in the comparison information storage module by performing the CFD analysis from the waveform image of the running vessel to derive the CFD analysis result, And a CFD comparison module for outputting the result of the comparison.
[13] The apparatus of claim 13, wherein the CFD comparison module compares the period and amplitude of the waveform image.
The image comparison unit may further include an analysis result calculation module for calculating the shape similarity of the waveforms output from the image comparison module and the CFD comparison module, the periodicity and the amplitude similarity of the waveforms as waveform image analysis results for verification of the linear design of the ship, And a waveform image analyzer for linear verification of the ship.
[15] The apparatus of claim 15, wherein the analysis module calculates the image comparison result and the CFD comparison result as numerical similarity values.

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