KR102003290B1 - Portable axle weighing scale and image processing applied vessel draft measuring apparatus and overload monitoring method using the same - Google Patents

Abstract

The present invention identifies overload by monitoring draft of a ship during shipment, comprises a portable axial load scale (10), a camera (21), a water gauge (22) and a computer connected therewith and receiving a measured value, monitors lifting movement of the ship through an image processing method of the computer (20) in real time, revise the same in accordance with a change of a water level, and compares the measured value of the axial load scale (10), thereby being possible to identify an exact shipment situation. Accordingly, the present invention is possible to precisely monitor the shipment situation of the ship during anchoring in real time, is possible to exactly identify the change of the draft in accordance with the shipment and progress thereof, and is possible to effectively monitor shipment fraudulent act such as draft rigging through discharge of ballast water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a ship draft monitoring apparatus and a ship overload monitoring apparatus using the same,

The present invention relates to a portable shaft relay 10, a camera 21, a water level meter 22 and a computer 20 connected to these and receiving a measurement value, And it is possible to grasp the accurate loading situation by real time monitoring the elevation behavior of the ship by the image processing technique of the computer 20, correcting it according to the water level fluctuation and checking the measured values of the shaft relay 10.

Overloads exceeding the appropriate load in ship operation may cause serious damage to the ship, which may lead to serious accidents. In particular, fleet ships carrying freight and passengers may cause large-scale casualties. It is necessary to actively monitor and crack down on overtime.

Overhauling of vessels during berths is mainly carried out during the shipment process, in which the method of comparing the declared shipments with the weight of the shipments actually shipped is the dominant mode, and related prior art is disclosed in Published Patent Application No. 2016-23944 have.

Conventional maritime surveillance techniques, including Laid-Open Patent No. 2016-23944, are carried out in such a manner that the weight of the individual cargo shipped to an anchored vessel is measured and the measured values are accumulated. However, there is a limit to the actual grasp of illegal shipment, including overload, unless precise grasp of shipments on board ship is preceded.

In particular, information on shipments on board vessels can not but be relied on to report vessel operators, such as shipping companies. If the shipper carries a reduced declaration, Can be avoided.

In order to monitor such illegal shipments, it is possible to consider, for example, inspecting vessels departing from each ship through visual inspection or inspection equipment, but it is necessary to increase the number of skilled investigators In addition, there is a problem that a considerable cost is required for personnel and equipment operation.

In particular, the above-mentioned illegal shipment behavior can not be accurately grasped by a single or intermittent inspection of the ship draft because the draft can be arbitrarily controlled through discharge of the ballast water.

Therefore, it is possible to consider a method of resident surveyor during the shipment work of a ship. However, as the ship becomes larger in size, it takes a long time for the shipment work, and there is a limit in accuracy and reliability in monitoring the draft through visual or manual equipment. The effect could not be expected.

SUMMARY OF THE INVENTION In view of the above-described problems, it is an object of the present invention to enable accurate real-time monitoring of a ship draft, and to precisely determine whether an overload or an unauthorized shipment by accurately considering various factors such as water level fluctuation and actual loaded cargo weight And a lamp 30 connected to both sides of the pressure reduction plate 11. The vessel 20 is provided with a computer 20, A camera 21 which is connected to the computer 20 as a digital imaging device for photographing the ship to transmit image information, a non-contact type And a portable water gauge (22) connected to the computer (20) as a water level measuring device for transmitting the elevator which is the displacement of the water surface per unit time. It is the vessel draft sensing device.

A vertical groove 52 connecting the upper surface and the lower surface and a horizontal groove 51 connecting the vertical groove 52 and the side edge are formed at the end of the pressure sensitive plate 11 and the end of the ramp 30, A coupling hole 50 is formed in the joining portion of the horizontal groove 51 and the vertical groove 52 and a connecting portion 41 connecting the pair of insertion portions 42 and the insertion portions 42 as a U- When the coupling rods 40 of the coupling rods 40 are arranged in a single straight line and the coupling rods 40 of the coupling rods 40 are connected to the horizontal grooves 50 And the connecting portion 41 of the binding rod 40 is coupled to the vertical groove 52 when the pressure sensitive plate 11 and the lamp 30 are stacked. This is the draft sensing device.

In addition, in the ship overhaul method using the portable axial relay and image processing application ship draft inspection apparatus, image information picked up by the camera 21 is transmitted from the camera 21, An input step S11 in which the lift elevator as a displacement of the water surface is sent out from the water level meter 22 and the axle relay 10 is sent out from the shaft relay 10 and inputted to the computer 20, A program storage step S12 of storing image information, elevator, and arithmetic data per viewpoint in the storage device; and a step of extracting image information from the storage device and binarizing the image information to generate binary image information per viewpoint A binarization step (S21), a position extraction step (S22) in which the detection program extracts the mark position information per view from the binary image information and stores it in a storage device, A displacement calculation step (S23) of calculating a landmark displacement, which is a variance of the landmark landmark information, for each point of view, and storing the landmark displacement in a storage device; and calculating a correction displacement for each point by subtracting the ascending / And a detection step (S41) of detecting a time point of shipment using a point value per viewpoint by the detection program. The ship's draft inspection apparatus according to claim 1, It is an oversight method.

The present invention can precisely monitor the shipment condition of a ship in berth in real time, accurately grasp the variation and trend of the draft according to the shipment, and in particular, You can effectively monitor your actions.

Therefore, it is possible to stipulate the overload of the ship, thereby making it possible to secure the safe operation of the ship and to prevent a marine accident.

Brief Description of the Drawings Fig.
Fig. 2 is a block diagram
Fig. 3 is an axial cross-sectional perspective view of the present invention
Figure 4 is a flow chart
5 is a computer screen example of the present invention
6 is an explanatory diagram of an axial relay assembly method according to the present invention
7 is an explanatory diagram of an axis relay decomposition and reduction method of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, FIG. 1 exemplifies the performance of the present invention, including a ship in shipment, a shaft relay 10 for winding the cargo loaded vehicle, a camera 21 for shooting the ship, There is shown a computer 20 which is connected to a water level meter 22 and these axis relay 10, camera 21 and water level meter 22 in a wired or wireless manner to receive various information.

That is, as shown in FIG. 2, the ship draft monitoring apparatus of the present invention includes a portable axial relay 10 for measuring the weight of a vehicle loaded with a ship loaded cargo, a camera 21 as a digital imaging device for shooting a ship, A portable water level meter 22 such as an ultrasonic water level meter 22 and the like are electrically connected to these axis relay 10, the camera 21 and the water level meter 22 to receive image information and various measured values, And a computer 20 on which a detection program is installed.

3, the axial relay 10 according to the present invention is a portable device including a pressure sensitive plate 11 for detecting the wheel load of the wheel and a ramp (not shown) connected to both sides of the pressure reducing plate 11 30, and a pressure sensor is built in the pressure-sensitive plate 11 to measure the radii of the vehicle stopped on the pressure-sensitive plate 11. FIG.

The camera 21 applied to the present invention is installed in a ground fixing means such as a tripod as shown in FIG. 1 so that a draft indicator or the like displayed on the ship can be photographed. Thus, It reflects the lift of the ship.

However, if the ship is floated on the sea surface and the water level fluctuates due to the tide or wave, the elevation of the ship also has to fluctuate. Therefore, the camera 21 fixed on the ground will be referred to as the absolute position of the ship, It is possible to grasp only the variation of the position.

However, in the present invention, the water level gauge 22 is connected to the computer 20 so as to grasp the real-time water level fluctuation, This can be used to calculate the relative position of the ship.

2, a non-contact type level measuring instrument such as an ultrasonic level gauge 22 is applied and connected to the computer 20 so as to be able to ascend / .

As shown in FIG. 4, the ship surveillance monitoring method using the ship draft monitoring apparatus of the present invention is a method in which image information captured by a camera 21 is transmitted from a camera 21, The lift and elevator which is the displacement is sent out from the water level meter 22 and started to the input step S11 in which the cormorant value measured at the shaft relay 10 is sent out from the shaft relay 10 and inputted to the computer 20.

That is, the image information obtained by photographing the draft indicator displayed on the ship by the camera 21, the elevator measured by the water level meter 22 and the corridor value measured by the shaft relay 10 are input to the computer 20 in real time, The image information input here is digital image information, and the elevator and pedestrian value are digital numerical value information.

In the input step S11, the ascending and descending values of the information inputted to the computer 20 have numerical information in common in that they are numerical information. However, the ascending and descending means is information indicating the ascending and descending of the water level, ) Is an absolute value used to correct the displacement calculated on the basis of the image information, whereas the root value is an absolute value indicating the weight actually sensed by the pressure sensitive plate 11. [

Further, as described above, the camera 21 of the present invention is a digital image pickup apparatus with an image pickup device incorporated therein. The camera 21 processes raw image pickup information generated by the image pickup device to generate image information at a time point at a unit time interval, And transmitted to the computer 20 in real time.

That is, if the camera 21 performs shooting of 100 frames per second or the camera 21 performs continuous shooting of still images, if 100 frames per second are performed, 0.01 second.

When the input step S11 is completed, a storage step S12 of storing the image information, elevator and pedestrian value per viewpoint is performed in the storage device mounted on the computer 20, A program for receiving and processing information sent from the camera 21, the water level meter 22 and the axis relay 10 in performing the invention and performing image processing such as binarization, which will be described later, The computer 20 is mounted as an operating system application format.

After the storage step S12 is performed, the computer 20 extracts image information from the storage device and binarizes the image information to generate binarized image information per viewpoint, and a binarization step (S21) A position extracting step (S22) for extracting the point-by-point marker position information from the information and storing the point-in-time marker position information in the storage device is performed.

The image information captured by the camera 21 and input to the computer 20 in the input step S11 includes the markers displayed on the hull of the ship. In the binarization step S21 for processing input and stored image information, And the position extracting step S22 are illustrated in Fig.

That is, FIG. 5 shows an execution screen of a detection program for carrying out the present invention, in which the image information captured by the camera 21 is output before and after the binarization process on the upper side in the drawing, Are displayed in a graph format.

The image information input to the computer 20 in the input step S11 is bit map image-based information obtained from the image pickup element of the camera 21, and in the binarization step S21, The binary image information is generated for each time point, and a detailed process thereof is illustrated in the upper part of FIG.

The binarization of the image information is processing for maximizing the contrast by dividing the pixel value of the image (image) constituting the image information by a value lower than a value exceeding a certain reference value, thereby obtaining the visual information Is converted into binary information for each of the plane coordinates, and the succeeding position extraction step S22 can be performed.

In the meantime, since the sign applied to the present invention is advantageous in the process of binarization and the like in which a hue or lightness contrasted with surrounding objects is clearly provided, the draft indicator displayed on the hull is generally in contrast to the peripheral portion, It is preferable to apply a draft indicator as a marker to be applied to the subject of the camera 21. [

Also, as shown in FIG. 5, the binarization may be performed by crop processing to cut out the local region including the marker before binarization.

In the position extracting step (S22) in which the detection program extracts the marker position information from the binary image information after the completion of the binarization step (S21) and stores the marker position information in the storage device, the marker position information is the image plane of the marker The positional information can be expressed as numerical information, that is, the plane coordinate of the landmark.

Although the landmark position information extracted in the position extracting step S22 may be two-dimensional plane coordinates on the image plane, the interest of the present invention is the lifting and lowering behavior of the ship, and the camera 21 has a fixed position and angle of view The sign on the hull is photographed. If the hull side vibration is neglected, the landmark on the image plane is vertically elevated, so that the landmark position information may be simplified to the vertical line position.

In particular, in the case where the mark position information is converted into the vertical position, which is the one-dimensional information, in the position extracting step S22, the amount of information to be processed and the computational resources can be saved.

When the position extracting step (S22) is completed, a displacement calculating step (S23) is performed in which the detecting program calculates the landmark displacement, which is the variance of the landmark position information per unit time, , Thereby obtaining a landmark displacement indicated by an imaginary line in the graph shown in the lower part of FIG.

In the graph of FIG. 5, the landmark displacement indicated by the imaginary line is the displacement of the hull detected based on the ground, reflecting not only the draft due to the shipment but also the lift of the sea surface itself due to tide or wave.

In other words, even when the ship is not completely loaded, the absolute value of the landmark displacement is unconditionally detected when the sea level is changed by tide or wave and the ship is raised or lowered accordingly. Can not be accurately grasped.

Accordingly, in the present invention, after the completion of the displacement calculation step (S23), the detection program subtracts the ascending / descending per view point from the landmark displaced point by point to calculate the correction displacement at each point of time, The actual draft change is detected.

In the graph of Fig. 5, the correction displacement is indicated by a solid line, and it can be confirmed that the correction displacement is generated by subtracting the lift indicated by the dashed line on the graph from the landmark displacement before correction indicated by the imaginary line.

Thereafter, a detection step S41 is performed in which the detection program detects the shipping time point by using a point-of-view value at the point of time. In the detecting step S41, as indicated by an inverted triangle in the graph of FIG. 5, .

In FIG. 5, the mark displacement and the correction displacement graph indicated by the imaginary line and the solid line, respectively, are shaken immediately after the point of time of the shipment indicated by the inverted triangle is due to the dropping of the cargo or the impact occurring when the car is loaded, Is determined by the graph at the time of returning to the stable state immediately after the steep rise.

As described above, through the detection step S41, it is possible to grasp the shipment time at which the cargo is loaded on the ship, and thereby to detect an abnormal change in the draft. First, when the correction displacement is formed in the negative direction, Can be regarded as a change in the abnormal draft at the time of shipment, and if there is no increase or insignificant increase in the draft after the point of shipment, it can also be regarded as a change in the abnormal draft.

For example, assuming an illegal shipping situation in which the equilibrium water of the ship is discharged at the same time as the shipment and the increase in the draft is suppressed, the correction displacement is not sufficiently raised in spite of the detection of the shipping point in the detecting step S41, And at this time, the inspection program outputs an alarm signal or the like so that the practitioner of the present invention as a port management subject can grasp it.

Particularly, the above-mentioned subtle unauthorized shipment behavior can not be grasped at all in the prior art, and a significant effect can be obtained through the present invention in the shipment management work such as oversight.

3, the axial relay 10 according to the present invention is a portable axial relay 10, which comprises a pressure reducing plate 11 for detecting the wheel load of the wheel, And a lamp 30 connected to both sides of the pressure-sensitive plate 11 for advancement.

The shaft relay 10 according to the present invention which is the portable axial relay 10 needs to assemble and disassemble the pressure reducing plate 11 and the lamp 30 constituting the shaft relay 10 as necessary. A horizontal groove 51, a vertical groove 52 and a coupling hole 50 are formed in the pressure sensitive plate 11 and the lamp 30 as shown in Figs. 6 and 7, and the U- The shaft relay 10 can be easily assembled and disassembled and the space required for transportation and storage of the shaft relay 10 can be minimized.

6 shows a state in which the lamp 30 is connected to one end of the pressure reducing plate 11. The end of the pressure reducing plate 11 and the end of the lamp 30 are provided with vertical grooves 52 for connecting the upper surface and the lower surface, And a horizontal groove 51 connecting the vertical groove 52 and the side edge are formed and a coupling hole 50 is formed at the junction of the horizontal groove 51 and the vertical groove 52.

That is, the T-shaped horizontal grooves 51 and the vertical grooves 52, which are entirely conducted to the ends of the pressure sensitive plate 11 and the ramp 30, are formed as in the excerpted enlarged portion of FIG. 6, The horizontal grooves 51 and the engaging holes 50 formed in the horizontal grooves 51 and the vertical grooves 52 are formed in the contact holes 50 in the U- A coupling rod 40 composed of a pair of insertion portions 42 and a coupling portion 41 connecting the insertion portions 42 is coupled.

One end of the U-shaped connecting rod 40 is coupled to the coupling hole 50 of the pressure sensitive plate 11 and the other end of the other end of the U- Is coupled with the coupling hole 50 of the lamp 30 so that the pressure sensitive plate 11 and the lamp 30 are coupled to each other. The connecting portion 41 of the binding rod 40 is coupled to the horizontal groove 51 and the pressure reducing plate 11 and the lamp 30 The connecting portion 41 of the binding rod 40 is coupled to the vertical groove 52. [

That is, when the pressure reducing plate 11 and the lamp 30 shown in the upper part of FIG. 7 are arranged in a single straight line, the axial relay 10 is used in the field, Is coupled to the pressure relief plate 11 and the horizontal grooves 51 of the lamp 30 to firmly maintain the linear connection state of the pressure sensitive plate 11 and the lamp 30, When the plate 11 and the lamp 30 are stacked, the connecting portion 41 of the binding rod 40 is connected to the pressure reducing plate 11 and the lamp 30 The pressure accumulating plate 11 and the lamp 30 laminated body can be maintained in a closely stacked state and the required space can be minimized.

10: Axis relay
11: Pressure sensitive plate
20: Computer
21: Camera
22: Water gauge
30: Lamp
40:
41:
42:
50: coupling ball
51: Horizontal groove
52: Vertical groove
S11: Input step
S12:
S21: binarization step
S22: Location extraction step
S23: Displacement calculation step
S31: Displacement correction step
S41: Detection step

Claims (3)

delete The ship draft inspection apparatus using the shaft relay 10 is composed of a pressure sensitive plate 11 for sensing the weight of the oil and a lamp 30 connected to both sides of the pressure sensitive pressure plate 11 and connected to the computer 20, A camera 21 which is connected to the computer 20 as a digital imaging device for photographing a ship and transmits image information and a computer 20 as a non-contact level measuring device And a portable water gauge (22) connected to the water level sensor (22) to transmit a lift, which is a displacement of the water surface per unit time, in a portable shaft relay and image processing application vessel draft inspection apparatus,
At the end of the pressure sensitive plate 11 and the end of the lamp 30, a vertical groove 52 connecting the upper surface and the bottom surface, and a horizontal groove 51 connecting the vertical groove 52 and the side end are formed;
A coupling hole (50) is formed at a junction of the horizontal groove (51) and the vertical groove (52);
A binding rod (40) composed of a pair of insertion portions (42) and a connection portion (41) connecting these insertion portions (42) as a U - shaped hook is coupled to the coupling hole (50);
When the pressure sensitive plate 11 and the lamp 30 are arranged in a single straight line, the connecting portion 41 of the binding rod 40 is coupled to the horizontal groove 51, and the pressure sensitive plate 11 and the lamp 30 are stacked The connection portion 41 of the binding rod 40 is coupled to the vertical groove 52. [0030] In the present invention,
The ship draft inspection apparatus using the shaft relay 10 is composed of a pressure sensitive plate 11 for sensing the weight of the oil and a lamp 30 connected to both sides of the pressure sensitive pressure plate 11 and connected to the computer 20, A camera 21 which is connected to the computer 20 as a digital imaging device for photographing a ship and transmits image information and a computer 20 as a non-contact level measuring device And a portable water gauge (22) connected to the water level sensor (22) for transmitting a lift, which is a displacement of the water surface per unit time, the method comprising the steps of:
The image information picked up by the camera 21 is transmitted from the camera 21 and ascending and descending as the displacement of the water surface per unit time measured by the water level meter 22 is transmitted from the water level meter 22, 10) and input to the computer 20 (step S11);
A storing step (S12) of storing, in a storage device, a detection program mounted on the computer (20), image information, elevator and pedestrian value per viewpoint;
A binarization step (S21) of extracting image information from the storage device and binarizing the image information to generate binary image information per viewpoint;
A position extracting step (S22) of extracting the mark position information per view from the binary image information and storing the mark position information in the memory device;
A displacement calculating step (S23) of calculating a landmark displacement, which is a variance of the landmark position information per unit time, at each point of time using the landmark position information of the detection program, and storing the landmark displacement in the storage device;
A displacement correction step (S31) of subtracting the ascending / descending step by point from the pointed marker displacement at the point of time and calculating a correction displacement at each point of time and storing the calculated displacement into the storage device;
And a detecting step (S41) of detecting a loading time by using a point-of-view value by the detecting program.

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