KR102334625B1 - Monitoring method of periphyton and cleaning method for hull using the same - Google Patents

Abstract

The present invention relates to a technology for removing the attached organisms (PERIPHYTON) attached to the hull 200 (HULL) anchored in the ship manufacturing process, and more specifically, the hull cleaning by determining the optimal time to perform the hull cleaning It relates to a monitoring method for hull-attached organisms and a hull cleaning method using the same to improve the efficiency of the ship and to minimize damage to the film of paint that occurs during hull cleaning.
To this end, the present invention provides the steps of monitoring an underwater image around the hull 200, analyzing the underwater image to measure the amount of distribution of larvae compared to seawater of attached organisms, and comparing the measured distribution of larvae with a predetermined set value. It provides a method for monitoring a hull attached organism, comprising the step of determining the hull cleaning time of the hull.

Description

Monitoring method for hull attached organisms and hull cleaning method using the same

The present invention relates to a technology for removing PERIPHYTON attached to a hull (HULL) anchored in the ship manufacturing process, and more particularly, the efficiency of hull cleaning by determining the optimal time to perform hull cleaning It relates to a monitoring method for hull-attached organisms and a hull cleaning method using the same to improve the hull and minimize damage to the film of paint that occurs during hull cleaning.

After launching the ship, it is moored on the pier for subsequent processes such as installation of equipment, and although there is a difference depending on the seasonal factors of the mooring period, marine bacteria and diatoms (PLEUROSIGMA SPP) Not only SLIME, but also animal and vegetable marine organisms such as barnacles (BARNACLE), oysters, mussels, green laver, and seaweed attach to the surface of the hull.

In particular, in the case of barnacles, it is important to remove them at the early stage of attachment because the roots grow while digging into the hull's coating layer.

Once the coating layer is dug, damage to the coating film is unavoidable for complete removal, and repair work for damage to the coating film is impossible in water, so in most cases, the root part is left on the surface of the coating film.

The remaining root part increases the surface roughness of the hull and acts as a cause of lowering the speed toward the hull, which increases the risk of not meeting the guaranteed ship speed during short-term test operation.

In addition, in the long term, it causes an increase in fuel cost according to the operation of the vessel.

For this reason, some ship owners require re-painting of the damaged coating after complete removal and removal of the root part after re-docking, which causes very high additional costs and delays in the production process.

In order to prevent these additional costs and delays in the process, we are currently conducting periodic hull inspection and cleaning about twice a month to prevent attachment of organisms attached to the hull shell.

However, performing such investigation and cleaning work on all ships moored at the quay wall is not only practically impossible, but also entails enormous cost, considering the process of the quay wall, the number of mooring ships, and the number of workers to be put in. . In addition, there is a problem in that detailed work cannot be performed due to the greatly increased amount of work.

In order to solve this problem, equipment such as “underwater robot for cleaning and inspection of ship bottom” described in Patent Publication No. 2008-0093536 was developed and put into operation, thereby quickly cleaning the hull and repairing the damaged part of the shell plate. It is designed to quickly identify and reduce the cost of barnacle removal. (Refer to Korean Patent Publication No. 2008-0093536)

However, even if such an underwater robot is applied, a huge cost is incurred for periodically operating expensive equipment, and damage to the hull shell plate occurs due to hull cleaning, so there is a problem that the work to repair the hull coating film damage is followed. .

Laid-open Patent Publication No. 2008-0093536 (published date: October 22, 2008)

The present invention for solving the above problems of the prior art is based on the analysis result of the biological (BIOLOGICAL) characteristics of the attached organism, the maximum attachment point of the attachment organism attached to the hull during mooring on the quay wall and the optimal point of time according to the prediction result of the attachment amount of the hull By having the survey and cleaning be carried out, the number of hull cleaning and the cost thereof are reduced, and the cost for repainting and the delay of the entire process in case of damage to the hull coating film due to hull cleaning can be dramatically reduced. An object of the present invention is to provide a method for monitoring hull-attached organisms and a hull cleaning method using the same.

According to the present invention for achieving the above object, monitoring the underwater image around the hull, analyzing the underwater image to measure the larval distribution compared to the seawater of the attached organism, and the measured larval distribution is determined in advance A method for monitoring hull adherent organisms is provided, comprising determining an optimal hull cleaning timing compared to a set point.

The measuring of the larval distribution amount of the adherent organism may be configured to measure the distribution amount of the cypris larvae, which is a step in which the adherent organism larva finds an appropriate substrate and prepares for epiphysis on the surface of the hull.

The measuring of the larval distribution of the adherent organism may be configured to periodically repeat the measurement at least once a day when the larval distribution of the adherent organism relative to seawater is less than 30%.

In addition, according to another aspect of the present invention, monitoring an underwater image around the hull, analyzing the underwater image to measure the amount of larval distribution compared to seawater of the attached organism, and the measured larval distribution is a predetermined set value There is provided a hull cleaning method using the monitoring of hull-attached organisms comprising the steps of executing a hull survey when exceeding

After executing the hull cleaning, the method may further include recording the state of the hull by the hull cleaning and the distribution of larvae in the database.

The step of recording the state of the hull and the distribution of larvae in the database may be configured to record the distribution of nauplius larvae, which is a step before preparing for implantation on the hull.

The executing of the hull survey may be configured to perform partial hull survey for a main area of the hull when the larval distribution relative to the seawater of the attached organism is within the range of 30% to 60%.

In the step of executing the hull survey, when the larval distribution of the attached organisms to seawater is within the range of 30% to 60%, a partial hull survey for the main area of the hull is performed, and the work schedule and process for cleaning the hull may be configured to establish.

The step of executing the hull survey may be configured to perform hull survey for the entire area of the hull when the larval distribution relative to the seawater of the attached organism exceeds 60%.

The executing the hull cleaning may be configured to execute the hull cleaning when it is determined that the hull cleaning is necessary through the executing the hull survey.

According to the monitoring method and hull cleaning method of the hull-attached organism of the present invention, the maximum attachment point and attachment amount are predicted through the analysis of the distribution and distribution of larvae compared to the seawater in the step of preparing the epiphysis on the surface of the hull by the attachment organism to investigate and clean the hull By analyzing the adhesion amount and distribution of the larval stage before the preparation for epiphysis and preparing for the preparation and countermeasures for the hull cleaning, the efficiency of hull cleaning is improved, and the number of hull cleaning is reduced. Costs can be greatly reduced.

In addition, based on the analyzed larval distribution, it is possible to clean the hull at the initial stage when the attached organisms are attached to the hull, so it is possible to completely remove the attached organisms without damage to the hull coating surface. It is possible to dramatically reduce the docking cost and the delay of the ship's production process.

1 is a flowchart of a method for monitoring a hull attached organism according to an embodiment of the present invention;
2 is a conceptual diagram showing an example in which a monitoring means for monitoring an attached organism of the present invention is installed;
3 is a photograph showing the form of the metamorphosis stage of the attached organism larvae used for monitoring the attached organism of the present invention;
4 is a flowchart showing a hull cleaning method according to another embodiment of the present invention,
5 is a flowchart showing a detailed process of the hull cleaning method shown in FIG.

Hereinafter, the technical configuration of the hull-attached organism monitoring method and the hull cleaning method using the same according to the accompanying drawings will be described in detail as follows.

1 shows a sequence of a method for monitoring a hull attached organism according to an embodiment of the present invention, and FIG. 2 shows an example in which a monitoring means 220 for the attached organism monitoring method of the present invention is installed.

Referring to FIG. 1, the method for monitoring an organism attached to a hull 200 (refer to FIG. 2) of the present invention includes the steps of monitoring an underwater image around the hull 200 (S110), and analyzing the underwater image to attach against seawater It includes the step of measuring the distribution of larvae of living things (S120) and the step of determining the optimal hull cleaning time by comparing the measured amount of distribution of the larvae with a predetermined set value (S130).

As shown in FIG. 2, the monitoring of the hull-attached organism includes a device capable of photographing the underwater environment around the hull 200 in the water of the quay 20 where the ship 200 is launched, and the photographed underwater image. It can be implemented by installing the monitoring means 220 equipped with the analyzing device to monitor and analyze the image captured by the above-described monitoring means 220 .

On the other hand, Figure 3 shows the form of the metamorphosis stage of the attached organism larvae monitored in the step of monitoring the underwater image.

As shown in FIG. 3 , the larval stage of attachment organisms can be largely divided into NAUPLIUS, which is a floating stage before epiphysis, and CYPRIS, which finds an appropriate substrate and prepares for epiphysis.

Nauplius larvae go through 6 metamorphoses, and Cypris larvae go through 2 metamorphosis.

Each metamorphic stage has morphological characteristics, and these morphological characteristics provide information to distinguish each larval stage.

In the step of measuring the distribution amount of the larvae of the attachment organisms, the distribution amount of the cypris larvae prepared for epiphysis on the hull 200 among the larvae of the attachment organisms shown in FIG. 3 in seawater is measured.

The attachment organism monitoring method of the present invention determines the maximum attachment time and amount of attachment organisms attached to the hull 200 through an underwater image around the hull 200 moored on the quay wall 20 based on the biological characteristics analysis result of the attachment organisms predict

In other words, it is possible to predict the maximum amount and time of attachment by analyzing the distribution and distribution of cypris larvae in seawater, which is a step to find an appropriate substrate and prepare for epiphysis on the surface through the metamorphosis step-by-step morphology analysis of the adherent larvae.

4 shows a step-by-step sequence of a hull cleaning method according to another aspect of the present invention, and the following description will further enhance understanding of the hull-attached organism monitoring method described above.

In this embodiment, by using the monitoring method of the hull-attached organism as described above to determine the timing to perform the hull investigation and hull cleaning, the hull can be cleaned easily and efficiently, and at the same time, the number of times can be reduced.

4 , the hull cleaning method according to this embodiment includes the steps of monitoring an underwater image (S410), measuring the larval distribution compared to seawater (S420), and executing the hull survey (S430) and the hull and performing cleaning (S440).

In this embodiment, the step (S410) of monitoring the underwater image and the step (S420) of measuring the larval distribution of the attached organism are the same as the configuration (S110, S120) of the method for monitoring the attached organism on the hull described above. Possible explanations will be omitted.

Referring to FIG. 4 , after the step (S420) of measuring the larval distribution of the attached organisms as described in the preceding method for monitoring the hull attached organisms, the step of executing the hull survey (S430) and the step of executing the hull cleaning (S440) is executed

Such hull irradiation and hull cleaning are preferably performed sequentially, but either one may be omitted depending on the measured larval distribution amount.

In the step of performing the hull survey (S430), the hull survey is performed when the distribution amount of cypris larvae measured in the above-described larval distribution measurement step (S420) exceeds a preset setting value.

The investigation of the hull may be carried out by a method such as direct inspection by a direct operator by diving, and may be carried out step by step with a part or all of the hull 200 according to the distribution amount of the cypris larvae described above.

That is, if the measured cypris larval distribution of the attached organism is only a small amount less than the set value, the step (S420) of measuring the larval distribution of the organism is repeatedly performed, and the cypris larval distribution of the attached organism exceeds the preset set value If so, the hull survey and cleaning (S430, S440) is performed in stages.

In the step (S440) of executing the hull cleaning, the operator dives into the water and removes the attached organisms directly, as in the conventionally known method, or by applying the recently developed hull cleaning robot and hull cleaning system. can be executed

In addition, after the hull cleaning is performed, the step of recording and updating the hull state after hull cleaning and the larval distribution amount and distribution of the attached organisms in the database (S450) may be further included.

In this step (S450), by measuring the distribution amount and the distribution of the nauplius larval stage together before the preparation for epiphysis and making it a database, it is possible to prepare in advance preparations and countermeasures to prevent adhesion of attached organisms before carrying out hull cleaning.

Figure 5 shows the detailed process of the hull cleaning method of the present invention shown in Figure 4, through which the detailed configuration of the hull cleaning method of the present invention will be described in more detail.

Referring to FIG. 5 , first, the underwater image is monitored and analyzed (S410) to measure the larval distribution compared to seawater (S420), and compare whether the measured larval distribution exceeds a predetermined set value (S421).

For reference, the above-described underwater image monitoring (S410) and larval distribution measurement (S420) are continuously performed until the entire process of the hull cleaning method of the present invention is completed when the vessel is anchored.

The larval distribution measured in the larval distribution measurement step (S420) measures the cypris larval distribution, which is a step to prepare an epiphysis on the surface of the hull 200 by finding an appropriate substrate through morphological analysis of the larval metamorphosis of the attached organism.

In the step (S421) of comparing whether the measured larval distribution with respect to seawater exceeds a predetermined set value, a preset set value as a comparison target may be set to, for example, 30% compared to seawater.

As a result of comparing the measured larval distribution with the set value, if the measured larval distribution does not exceed a predetermined set value, the step of measuring the larval distribution is repeated without proceeding to the next step ( S420 ).

At this time, it is preferable to measure the amount of larval distribution regularly at least once a day.

On the other hand, if the amount of larval distribution in seawater exceeds 30%, it is compared whether it falls within the range of 30% to 60%, which is a preset value (S422).

As a result of comparison, if the measured larval distribution relative to seawater falls within the range of 30% to 60%, the hull survey is performed for a main area corresponding to a certain part of the hull 200 (S430).

On the other hand, when the larval distribution relative to seawater exceeds the range of 30% to 60%, and after the hull survey is performed for the main area of the hull 200, the larval distribution amount exceeds a preset setting value of 60%, respectively. (S431).

At this time, if the amount of larval distribution relative to seawater does not exceed 60%, the step of comparing the distribution of larvae with the set value without moving on to the next step (S431) is repeated.

On the other hand, if it exceeds 60%, the hull survey is carried out with the naked eye or other methods for the epiphyte attached to the entire area of the hull 200 (S432).

In the step (S432) of executing such a hull survey, a work schedule and process establishment for hull cleaning execution may be executed at the same time.

After the hull investigation for the entire area of the hull 200 is executed (S432), it is determined whether or not the hull cleaning is required based on the investigation result (S433).

At this time, if it is determined that hull cleaning is necessary, equipment such as a worker or hull cleaning robot is put in to perform hull cleaning to remove attached organisms, etc. attached to the hull 200 (S440), otherwise, hull cleaning is required The process of determining whether or not (S433) is repeated.

According to the present invention, as described above, when the larval distribution compared to the seawater measured by the cypris larvae of the attached organism exceeds 60%, the hull survey is performed on the entire area of the hull 200 to determine whether the hull cleaning is necessary, and then immediately By allowing the hull cleaning to be carried out, it is possible to carry out cleaning operations at the initial stage of attachment of attached organisms.

That is, in this step, there is a large amount of attached organisms attached to the hull 200 in an excited state, thereby maximizing the efficiency of hull cleaning.

In addition, since the number of hull cleaning can be minimized and the complete removal operation can be easily made, damage to the coating surface of the hull 200 can be minimized.

After the hull cleaning is performed, the hull condition and larval distribution after cleaning are recorded in the database ( 4550 ), and the process returns to monitoring the underwater image ( 4510 ).

According to the monitoring and hull cleaning method of the hull-attached organism of the present invention as described above, the optimal time based on quantitative and objective analysis results for hull investigation and cleaning, which was excessively performed simply depending on seasonal and environmental experience values And it can be performed according to the number of times, so that it is possible to achieve cost reduction and minimize delay in the quay wall process.

In the long term, damage to the coating film due to the removal of attached organisms and re-painting and re-docking to repair them by deriving the optimal time for the prevention and complete removal of the attached organisms attached to the shell plate of the hull 200 It can provide a fundamental solution that can dramatically reduce costs and delays in the production process.

Until now, the monitoring method of hull-attached organisms and the hull cleaning method using the same according to the present invention have been described with reference to the embodiments shown in the drawings, but these are only exemplary, and any person skilled in the art can perform various modifications and equivalent other implementations therefrom It will be appreciated that examples are possible. Accordingly, the true scope of technical protection should be determined by the technical spirit of the appended claims.

20: quay wall
200: hull
220: monitoring means

Claims (10)

delete delete delete monitoring an underwater image around the hull 200;
analyzing the underwater image to measure the amount of larvae distribution compared to the seawater of the attached organisms;
executing a hull survey when the measured larval distribution exceeds a predetermined set value; and
performing hull cleaning when it is determined that it is necessary by the execution of the hull survey; is made, including
After executing the hull cleaning, recording the state of the hull 200 by the hull cleaning and the distribution of larvae in the database; further comprising,
The step of recording the state of the hull 200 and the distribution of larvae in the database,
A hull cleaning method using monitoring of attached organisms, characterized in that the distribution of nauplius larvae, a step before preparing for implantation in the hull 200, is recorded together. delete delete 5. The method of claim 4,
The step of carrying out the hull survey is,
Hull cleaning using the monitoring of attached organisms, characterized in that partial hull investigation of the main area of the hull 200 is performed when the larval distribution compared to the seawater of the attached organisms is within the range of 30% to 60% Way. 5. The method of claim 4,
The step of carrying out the hull survey is,
When the distribution of larvae compared to seawater of the attached organisms is within the range of 30% to 60%, partial hull investigation of the main area of the hull 200 is performed, and a work schedule and process for hull cleaning are established, characterized in that A hull cleaning method using the monitoring of adherent organisms. 5. The method of claim 4,
The step of carrying out the hull survey is,
A hull cleaning method using the monitoring of adherent organisms, characterized in that the hull survey is carried out for the entire area of the hull 200 when the larval distribution compared to the seawater of the attached organisms exceeds 60%. 5. The method of claim 4,
The step of performing the hull cleaning includes:
A hull cleaning method using the monitoring of attached organisms, characterized in that the hull cleaning is executed when it is determined that the hull cleaning is necessary through the step of executing the hull survey.

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