Mooring rope tension monitoring system

Abstract

A mooring rope tension monitoring system according to one embodiment includes a processing circuit that calculates mooring rope tensions of a plurality of mooring machines (2) on the basis of detection values of load cells provided to each mooring machine (2). The processing circuit displays, on a display unit (7), the mooring rope tensions at a reference time and the current mooring rope tensions for each mooring machine (2). Additionally, the processing circuit displays, on the display unit (7), change tendencies of the current mooring rope tensions with respect to the mooring rope tensions at the reference time for each mooring machine (2).

Description

Mooring line tension monitoring system

[0001] The present disclosure relates to a mooring line tension monitoring system.

[0002] When a ship is moored to a fixed structure such as a quay or an offshore base, multiple mooring lines are used. The end of each mooring line is fastened to a mooring post on the fixed structure, and the mooring lines are let out and reeled in by a mooring machine installed on the ship's deck.

[0003] While a ship is moored, the tension on the mooring lines increases or decreases depending on changes in sea conditions, weather, or draft. For this reason, it is advisable to periodically check the tension of the mooring lines while the ship is moored, and crew members patrol the deck using their five senses, including sight and touch. If the mooring lines are found to be too tight or too loose, the crew will operate the mooring machine to readjust the tension of the mooring lines.

[0004] Japanese Patent Application Laid-Open No. 2007-69718

[0005] However, the above-mentioned patrol work by the crew and the work of readjusting the tension of the mooring lines place a heavy burden on the crew.

[0006] Therefore, an object of the present disclosure is to provide a mooring rope tension monitoring system that can reduce the burden on crew members.

[0007] From a first aspect, the present disclosure provides a mooring line tension monitoring system comprising: a processing circuit that calculates the mooring line tensions of a plurality of mooring machines based on detection values ​​of load cells provided in each mooring machine and displays the calculated mooring line tensions on a display, wherein the processing circuit displays the mooring line tensions at a reference time and the current mooring line tensions of each of the plurality of mooring machines on the display.

[0008] From a second aspect, the present disclosure provides a mooring line tension monitoring system comprising: a processing circuit that calculates the mooring line tension of a plurality of mooring machines based on the detection values ​​of load cells provided in each mooring machine, and the processing circuit displays on the display the trend of change in the current mooring line tension relative to the mooring line tension at a reference time for each of the plurality of mooring machines.

[0009] According to the present disclosure, a mooring line tension monitoring system is provided that can reduce the burden on crew members.

[0010] FIG. 4 is a plan view of a ship equipped with a mooring line tension monitoring system according to a first embodiment; FIG. 5 is a front view of a mooring machine; FIG. 6 is a side view of a band brake; FIG. 7 is a diagram showing the home screen of a display; FIG. 8 is an enlarged view of a portion of FIG. 4; FIG. 9 is a graph showing the relationship between the number of winding layers and the design load of a mooring machine; FIG. 10 is a diagram showing individual screens for each mooring machine on the display; and FIG. 11 is a diagram showing the home screen of a display in a mooring line tension monitoring system according to a second embodiment.

[0011] 1 shows a ship 11 equipped with a mooring line tension monitoring system 1 according to a first embodiment. The ship 11 is moored to a fixed structure 14, such as a quay or an offshore base, using a plurality of mooring lines 13. The tip of each mooring line 13 is fastened to one of a plurality of mooring posts 15 arranged on the fixed structure 14. The mooring post 15 may be, for example, a bitt, a bollard, or a quick-release hook.

[0012] The mooring line tension monitoring system 1 includes a control device 5 that controls a plurality of mooring machines 2 installed on a deck 12 of a ship 11. Each mooring machine 2 reels in and pays out one or more corresponding mooring lines 13.

[0013] In this embodiment, eight mooring units 2, No. 10-17, are arranged on the deck 12. The mooring units 2 are numbered clockwise from the bow. That is, mooring units 2 No. 10-12 are arranged at the bow, mooring units 2 No. 13 and 14 are arranged on the starboard side, and mooring units 2 No. 15-17 are arranged at the stern. However, the number and arrangement of the mooring units 2 are not limited to this and can be changed as appropriate.

[0014] As shown in Figure 2, each mooring device 2 includes at least one drum 24 around which the mooring line 13 is wound, a motor 21 that rotates the drum 24 via a reducer 22 and a rotating shaft, and a band brake 3 that switches between allowing and prohibiting rotation of the drum 24. Note that the mooring line 13 is not shown in Figure 2 to simplify the drawing.

[0015] The rotating shaft passes through the drum 24, one end of which is rotatably supported by a support base 25, and the other end of which is connected to the output shaft of the reducer 22 via a clutch 23. The band brake 3 is disposed between the drum 24 and the clutch 23. The motor 21 may be a hydraulic motor or an electric motor.

[0016] In this embodiment, as shown in Figure 1, mooring units 2 Nos. 10, 11, and 15-17 each include one drum 24, and mooring units 2 Nos. 12-14 each include two drums 24. The drums 24 of mooring units 2 Nos. 10-17 are labeled A-K in the order of the mooring unit 2 numbers.

[0017] However, the number of drums 24 in each mooring unit 2 is not limited to this. For example, all mooring units 2 may include one drum 24, or at least one mooring unit 2 may include three drums 24.

[0018] When the mooring device 2 includes two drums 24, the mooring device 2 also includes two band brakes 3. Each band brake 3 is switchable between a locked state that prohibits rotation of the corresponding drum 24 and an open state that allows rotation of the drum 24.

[0019] 3, the band brake 3 includes a brake drum 31 that rotates together with the drum 24, and a pair of arc-shaped bands 32, 33 that fit along the outer peripheral surface of the brake drum 31. One ends of the bands 32, 33 are pivotally connected to each other via a pin 40. Brackets 34, 35 are provided at the other ends of the bands 32, 33, respectively.

[0020] The band brake 3 also includes a bracket 36 that rises from the deck 12 of the ship 11, a link mechanism 4 that connects the bracket 36 to brackets 34 and 35, and a band support 30 that is interposed between the lower band 32 and the deck 12.

[0021] The link mechanism 4 includes a tension bar 41, a substantially triangular first link 43, and a rod-shaped second link 45. The tension bar 41 extends upward from bracket 36 to bracket 35, and the lower part of the tension bar 41 is swingably connected to bracket 36 via a pin-type load cell 61. In other words, the load cell 61 is incorporated into the band brake 3. The load cell 61 detects the band tension acting on the bands 32, 33 in a restrained state. The upper part of the tension bar 41 is swingably connected to bracket 35 and first link 43 via pin 42. Furthermore, the first link 43 is swingably connected to second link 45 via pin 44, and the second link 45 is swingably connected to bracket 34 via pin 46.

[0022] In this embodiment, the band brake 3 includes a handle 39, and the band brake 3 is switched between a locked state and a released state by manually operating the handle 39. However, the band brake 3 may also include an actuator, and the band brake 3 may be switched between a locked state and a released state by remotely operating the actuator.

[0023] A male screw is formed at the tip of the handle 39, and this male screw is threaded into a nut portion 38 provided on the upper band 33. The above-mentioned substantially triangular first link 43 extends upward from the pins 42, 44 to a height approximately equal to that of the nut portion 38, and a handle support 47 is provided at the top of the first link 43 to support the handle 39 rotatably but immovably.

[0024] When the handle 39 is rotated in one direction, the pins 42, 46 move away from each other, forming a small gap between the bands 32, 33 and the brake drum 31, and the band brake 3 is in an open state. When the handle 39 is rotated in the opposite direction, the pins 42, 46 move closer to each other, the bands 32, 33 tighten the brake drum 31, and the band brake 3 is in a locked state.

[0025] As shown in Figure 2, the load cell 61 of each mooring device 2 is electrically connected to the control device 5. The control device 5 is also electrically connected to a winding number detector 62 provided for each drum 24, and the display device 7. Each winding number detector 62 detects the number of windings of the mooring rope 13 on the corresponding drum 24. For example, the winding number detector 62 converts the position of the outermost surface of the mooring rope 13 wound around the drum 24 into the number of windings. The display device 7 is installed, for example, in the bridge, the cargo handling monitoring room, a living room, or on the deck 12.

[0026] The control device 5 includes a processing circuit 51. The functions of the elements disclosed herein can be performed using circuits or processing circuits, including general-purpose processors, special-purpose processors, integrated circuits, ASICs (Application Specific Integrated Circuits), conventional circuits, and / or combinations thereof, configured or programmed to perform the disclosed functions. A processor is considered a processing circuit or circuit because it includes transistors and other circuitry. In this disclosure, a circuit, unit, or means is hardware that performs the recited functions or hardware that is programmed to perform the recited functions. The hardware may be hardware disclosed herein or other known hardware that is programmed or configured to perform the recited functions. Where hardware is a processor, which is considered a type of circuit, the circuit, means, or unit is a combination of hardware and software, and the software is used to configure the hardware and / or processor.

[0027] 4, the processing circuit 51 displays on the display 7 the positions of the mooring bollards 15 in the mooring area of ​​the ship 11 on the fixed structure 14 and the positions of the mooring machines 2 on the ship 11. The processing circuit 51 also displays on the display 7 which mooring bollards 15 the mooring lines 13 from each drum 24 of all the mooring machines 2 are fastened to, that is, the fastening pattern between all the mooring machines 2 and the mooring bollards 15 in the mooring area. Furthermore, the processing circuit 51 calculates the mooring line tensions of all the mooring machines 2 and displays the calculated mooring line tensions on the display 7.

[0028] In this embodiment, the locking pattern is displayed in the upper part of the screen of the display 7, and the mooring line tensions of all the mooring units 2 are displayed in the lower part of the screen. However, contrary to this embodiment, the locking pattern may be displayed in the lower part of the screen of the display 7, and the mooring line tensions of all the mooring units 2 may be displayed in the upper part of the screen. In this way, if the locking pattern is displayed in one of the upper and lower parts of the screen of the display 7, and the mooring line tensions of all the mooring units 2 are displayed in the other part, the crew can understand which mooring line 13 coming out of which mooring unit 2 is hanging on which mooring bollard 15, which helps the crew make a decision on which mooring line tension of which mooring line 13 they should pay particular attention to.

[0029] Each mooring line 13 extends from a mooring hardware of the ship 11 toward a mooring bollard 15. For example, the processing circuit 51 determines to which mooring bollard 15 each mooring line 13 extends from the corresponding mooring hardware based on bollard coordinate information indicating the position coordinates of the bollards 15 in the absolute coordinate system, ship coordinate information indicating the position coordinates of the ship 11 in the absolute coordinate system, and mooring hardware coordinate information indicating the position coordinates of the mooring hardware in the relative coordinate system on the ship 11. Alternatively, the processing circuit 51 may pre-store a locking pattern between the mooring machine 2 and the mooring bollard 15 for each fixed structure 14. Alternatively, the processing circuit 51 may determine to which mooring bollard 15 each mooring line 13 is to be locked by analyzing images of the deck 12 of the ship 11 and the surrounding area of ​​the ship 11 captured by a camera provided on the ship 11 or the fixed structure 14, or by using LiDAR (Light Detection and Ranging), a remote sensing technology.

[0030] The processing circuit 51 switches the screen displayed on the display 7 between the home screen 8 shown in Fig. 4 and an individual screen 9 shown in Fig. 7 corresponding to each mooring unit 2, i.e., for each mooring unit 2. The above-mentioned display of the locking pattern between the mooring unit 2 and the mooring bollard 15 and the mooring line tension are displayed on the home screen 8.

[0031] The processing circuit 51 calculates the mooring line tensions T of all mooring units 2 based on the detection values ​​of the load cells 61 provided in each mooring unit 2. More specifically, the processing circuit 51 calculates the mooring line tensions T from the band tensions detected by the load cells 61 for each mooring unit 2. If the mooring unit 2 includes multiple drums 24, the calculation of the mooring line tensions T is performed for each drum 24.

[0032] For example, the processing circuit 51 calculates the mooring line tension T using the following formula: F: Band tension [N] detected by the load cell 61 Ｄ d: Diameter of the mooring rope winding part of the drum 24 [mm] Ｒ : diameter of mooring rope 13 [mm] L: horizontal distance from the center of drum 24 to the center of load cell 61 [mm] N: number of winding layers detected by winding layer number detector 62 [-]

[0033] Furthermore, the processing circuit 51 displays the reference mooring line tension To and the current mooring line tension Tn for each mooring machine 2 on the home screen 8. For example, the reference time is after the mooring operation is completed or after the mooring line tension has been readjusted during mooring.

[0034] 4, the home screen 8 includes, at the bottom, mooring unit display frames 81 arranged in the horizontal direction, the same number as the number of mooring units 2. At the top of each mooring unit display frame 81, the number of the corresponding mooring unit 2 is written.

[0035] Each mooring unit display frame 81 includes tension display frames 82, the same number as the drums 24 of the corresponding mooring unit 2, that display the mooring line tension of the corresponding mooring unit 2. In this embodiment, the tension display frames 82 are vertically long rectangular. The name of the corresponding drum 24 is written above each tension display frame 82. As shown in FIG. 5, within each tension display frame 82, the reference mooring line tension To for the corresponding drum 24 is displayed by a horizontal line 85, and the current mooring line tension Tn is displayed by a bar 83. In other words, the position of the top end of the bar 83 indicates the current mooring line tension Tn. The current mooring line tension Tn is also displayed numerically immediately above each tension display frame 82. Note that in FIG. 4, the reference mooring line tension To and current mooring line tension Tn for mooring units 2 No. 10-12 and 15-17 are omitted from display.

[0036] In this embodiment, the processing circuit 51 displays the current mooring line tension Tn in a color corresponding to the mooring line tension Tn. A design load β that is lower than the breaking load α of the mooring line 13 is set for each mooring unit 2. For example, the design load β is within a range of 70% to 90% of the breaking load α.

[0037] As shown in Figure 6, the design load β of each mooring unit 2 decreases as the number of winding layers on the drum 24 increases. In this embodiment, the tension range R up to the design load β of the mooring unit 2 is divided into four regions R1-R4. However, the number of divided regions may be two or three, or may be five or more.

[0038] Regions R1-R4 are assigned different colors. For example, region R1, which has the highest tension, is colored red, region R2, which has the second highest tension, is colored yellow, region R3, which has the third highest tension, is colored green, and region R4, which has the lowest tension, is colored blue.

[0039] The processing circuit 51 determines which of the regions R1-R4 the current mooring line tension Tn belongs to for each mooring unit 2, and displays the current mooring line tension Tn in the color of the region to which the mooring line tension Tn belongs. In other words, the color of the bar 83 is set to one of the colors of the regions R1-R4.

[0040] As shown in FIG. 5 , a scale 84 is provided on the side of each tension display frame 82. That is, the processing circuit 51 displays not only the tension display frame 82 but also the scale 84 on the display 7. The scale 84 is divided into two or more regions, and the two or more regions are colored differently from each other. The different colors can be arbitrarily set by the crew. In this embodiment, the scale 84 is divided into the four regions R1-R4 described above, and the four regions R1-R4 are displayed in the colors to which they belong. That is, the color of the bar 83 is the same as the color of the scale 84 at the same position as the top end of the bar 83 indicating the current mooring line tension Tn. In other words, the processing circuit 51 displays the bar 83 indicating the current mooring line tension Tn within the tension display frame 82 in the same color as the corresponding region of the scale 84.

[0041] For example, the display 7 is a touch screen. When any of the mooring machine display frames 81 on the home screen 8 is touched, the processing circuit 51 switches the screen displayed on the display 7 to the individual screen 9 shown in Fig. 7 of the mooring machine 2 corresponding to the touched mooring machine display frame 81.

[0042] Each individual screen 9 includes a mooring unit number display frame 91, a drum graphic 93 indicating the drum 24 included in the mooring unit 2 corresponding to the individual screen 9, and a virtual home button 92. For example, the design load is indicated numerically within the drum graphic 93. When the home button 92 is touched, the processing circuit 51 switches the screen displayed on the display 7 to the home screen 8 shown in FIG.

[0043] Furthermore, the individual screen 9 includes a graph 94 with time on the horizontal axis and rope tension on the vertical axis. The processing circuit 51 displays the progress of the mooring rope tension T of the mooring unit 2 corresponding to the individual screen 9 on the graph 94 on the individual screen 9, and also displays a predicted future change in the mooring rope tension T with an arrow. Therefore, by looking at the individual screen 9 of each mooring unit 2, the crew can understand how the mooring rope tension T will change in the future.

[0044] If the mooring unit 2 includes multiple drums 24, the progress of the mooring line tension T of the mooring unit 2 is displayed for each drum 24. For example, since Fig. 7 shows the individual screen 9 for the mooring unit 2 No. 13, the graph 94 includes a progress 95 of the mooring line tension T of the drum 24 named E and a progress 96 of the mooring line tension T of the drum 24 named F.

[0045] Regarding prediction of future changes in mooring line tension T, the processing circuit 51 predicts future changes in mooring line tension T based on at least one of sea condition information and weather information. Alternatively, the processing circuit 51 may predict future changes in mooring line tension T based on at least one of sea condition information and weather information and the change in mooring line tension T from the present to a predetermined time ago. In this case, the accuracy of prediction of future changes in mooring line tension T can be improved.

[0046] For example, the processing circuit 51 may predict future changes in mooring line tension T based on at least one of sea condition information and weather information, and then correct the obtained predicted change in mooring line tension T based on the change in mooring line tension T from the present to a predetermined time ago.

[0047] In this embodiment, the processing circuit 51 predicts future changes in mooring line tension T based on tidal change prediction information as the sea condition information. The processing circuit 51 also displays, on the same graph 94 on the individual screen 9, the progress of the mooring line tension T of the mooring machine 2 corresponding to that individual screen 9 and the tidal change 97 included in the tidal change prediction information. In other words, the vertical axis of the graph 94 is also the tide level. Therefore, when the crew looks at the graph 94 on the individual screen 9, they can understand the relationship between the progress of the mooring line tension T and the tidal change.

[0048] As described above, in the mooring line tension monitoring system 1 of this embodiment, a crew member can grasp how much the current mooring line tensions Tn have changed from the reference time for all mooring machines 2 simply by looking at the home screen 8 of the display 7, and can determine whether or not readjustment of the mooring line tensions T is necessary. This eliminates the need for the crew member to periodically patrol the deck 12, thereby reducing the burden on the crew member.

[0049] Furthermore, in this embodiment, the current mooring line tension Tn is displayed in one of the colors of regions R1-R4, so that the crew can determine from the color whether the current mooring line tension Tn is in a safe area or a severe area.

[0050] Furthermore, in this embodiment, a bar 83 indicating the current mooring line tension Tn is displayed within the tension display frame 82 in the same color as the area of ​​the corresponding scale 84, so the scale 84 makes it clear when the color of the current mooring line tension Tn will change, making it easier for crew members to understand the situation.

[0051] Second Embodiment In this embodiment, the processing circuit 51 switches the screen displayed on the display 7 between a home screen 8A shown in Fig. 8 and an individual screen 9 shown in Fig. 7 for each mooring unit 2. In other words, the only difference between this embodiment and the first embodiment is the home screen 8A of the display 7.

[0052] As in the first embodiment, the processing circuit 51 displays on the home screen 8A the positions of the mooring bollards 15 in the mooring area of ​​the ship 11 on the fixed structure 14, the positions of the mooring units 2 on the ship 11, and the mooring patterns between all the mooring units 2 and the mooring bollards 15 in the mooring area. Meanwhile, the processing circuit 51 displays the change trend of the current mooring line tension Tn relative to the reference mooring line tension To for each mooring unit 2. For example, the change trend includes an increase or decrease in the current mooring line tension Tn relative to the reference mooring line tension To, and the amount or rate of change of the current mooring line tension Tn relative to the reference mooring line tension To.

[0053] The processing circuit 51 displays the change trend of the current mooring rope tension Tn relative to the reference mooring rope tension To at each mooring machine 2 in the corresponding tension display frame 82 using a symbol 87 corresponding to the change trend.

[0054] The processing circuit 51 changes the size, shape or color of the symbol 87 according to the change trend of the current mooring line tension Tn relative to the mooring line tension To at the reference time at each mooring unit 2. In this embodiment, the symbol 87 is an arrow, and the processing circuit 51 changes the size and shape of the symbol 87, i.e., the length and direction of the arrow, according to the change trend of the current mooring line tension Tn relative to the mooring line tension To at the reference time at each mooring unit 2.

[0055] More specifically, if the current mooring line tension Tn increases relative to the reference mooring line tension To, the processing circuit 51 displays an upward arrow as symbol 87, and if the current mooring line tension Tn decreases relative to the reference mooring line tension To, the processing circuit 51 displays a downward arrow as symbol 87. The processing circuit 51 also sets the length of the arrow to a length corresponding to the increase or rate of increase or the decrease or rate of decrease of the current mooring line tension Tn relative to the reference mooring line tension To.

[0056] In Fig. 8, the starting points of all the arrows are located at the same height, but the starting points of each arrow may be located at a height corresponding to the reference mooring line tension To, and the tip of each arrow may be located at a height corresponding to the current mooring line tension Tn.

[0057] However, the symbol 87 does not necessarily have to be an arrow, and may be a triangle pointing upward or downward. In this case, the processing circuit 51 displays an upward-pointing triangle as the symbol 87 when the current mooring line tension Tn increases relative to the reference mooring line tension To, and displays a downward-pointing triangle as the symbol 87 when the current mooring line tension Tn decreases relative to the reference mooring line tension To. The processing circuit 51 also sets the length of the triangle to a length corresponding to the increase or increase rate, or the decrease or decrease rate, of the current mooring line tension Tn relative to the reference mooring line tension To. Alternatively, the symbol 87 may be a character such as "large," "small," "increase," or "decrease." Furthermore, a combination of multiple symbols including characters may be displayed, such as an upward-pointing triangle combined with the character "increase."

[0058] Furthermore, as in the first embodiment, the processing circuit 51 determines which of the regions R1-R4 shown in Fig. 6 the current mooring line tension Tn belongs to, and displays the current mooring line tension Tn in the color of the region to which the mooring line tension Tn belongs. In other words, the color of the symbol 87 is set to one of the colors of the regions R1-R4.

[0059] As described above, in this embodiment, the crew can grasp the trend of change in the current mooring line tension Tn relative to the reference mooring line tension To for all mooring devices 2 simply by looking at the home screen 8A of the display 7, and can determine whether or not readjustment of the mooring line tension T is necessary. This eliminates the need for the crew to periodically patrol the deck 12, thereby reducing the burden on the crew.

[0060] Furthermore, in this embodiment, the change trend of the current mooring line tension Tn relative to the reference mooring line tension To at each mooring machine 2 is displayed using a symbol 87 corresponding to the change trend, so that the crew can determine the change trend of the current mooring line tension To relative to the reference mooring line tension To using the symbol 87.

[0061] Furthermore, in this embodiment, the current mooring line tension Tn is displayed in one of the colors of regions R1-R4, so that the crew can determine from the color whether the current mooring line tension Tn is in a safe area or a severe area.

[0062] <Modification> The processing circuit 51 may blink the arrow symbol 87 when the amount of change or rate of change in the current mooring line tension Tn relative to the reference mooring line tension To at each mooring machine 2 exceeds a predetermined value.

[0063] The processing circuit 51 may change only the shape of the symbol 87, i.e., the direction of the arrow, depending on the trend of change in the current mooring line tension Tn relative to the reference mooring line tension To at each mooring machine 2.

[0064] The processing circuit 51 may change only the size of the symbol 87 according to the changing trend of the current mooring line tension Tn relative to the mooring line tension To at the reference time in each mooring machine 2. For example, if the symbol 87 is a circle, the processing circuit 51 may set the diameter of the circle to a predetermined value when the current mooring line tension Tn is approximately equal to the mooring line tension To at the reference time, make the diameter of the circle larger than the predetermined value when the current mooring line tension Tn has increased compared to the mooring line tension To at the reference time, and make the diameter of the circle smaller than the predetermined value when the current mooring line tension Tn has decreased compared to the mooring line tension To at the reference time.

[0065] The processing circuit 51 may change only the color of the symbol 87 according to the trend of change in the current mooring line tension Tn relative to the reference mooring line tension To at each mooring unit 2. For example, an upward arrow and a downward arrow of constant size and shape may be displayed as the symbol 87 within each tension display frame 82, and both arrows may be colorless when the current mooring line tension Tn is approximately equal to the reference mooring line tension To, only the upward arrow may be colored red when the current mooring line tension Tn increases relative to the reference mooring line tension To, and only the downward arrow may be colored blue when the current mooring line tension Tn decreases relative to the reference mooring line tension To.

[0066] Furthermore, the processing circuit 51 may display on the home screen 8A the change trend of the current mooring line tension Tn relative to the reference mooring line tension To at each mooring unit 2 using only a color corresponding to the change trend, without using the symbol 87. For example, the tension display frame 82 may be filled with a single color, and the color may be changed to display the change trend of the current mooring line tension Tn relative to the reference mooring line tension To.

[0067] When the tension display frame 82 is filled in a single color, for example, it may be black if the current mooring line tension Tn is approximately equal to the reference mooring line tension To, orange if the increase or rate of increase in the current mooring line tension Tn relative to the reference mooring line tension To is small, and red if it is large, and light blue if the decrease or rate of decrease in the current mooring line tension Tn relative to the reference mooring line tension To is small, and blue if it is large.

[0068] If the trend of change in the current mooring line tension Tn relative to the reference mooring line tension To at each mooring machine 2 is displayed in color, crew members can determine the trend of change in the current mooring line tension To relative to the reference mooring line tension To by color.

[0069] Other Embodiments The present disclosure is not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present disclosure.

[0070] <Summary> In a first aspect, the present disclosure provides a mooring line tension monitoring system that includes a processing circuit that calculates the mooring line tensions of a plurality of mooring machines based on detection values ​​of load cells provided in each mooring machine and displays the calculated mooring line tensions on a display, and the processing circuit displays the mooring line tensions at a reference time and the current mooring line tensions of each of the plurality of mooring machines on the display.

[0071] With the above configuration, crew members can simply look at the display to see how much the current mooring line tension has changed from the reference time for all mooring devices, and can determine whether the mooring line tension needs to be readjusted. This means that crew members do not need to patrol the deck regularly, reducing the burden on crew members.

[0072] In a second aspect, in the first aspect, the processing circuit may display on a display the positions of a plurality of mooring bollards arranged on a fixed structure, display the mooring line tensions of the plurality of mooring lines in one of the upper and lower parts of the screen of the display, and display the mooring pattern between the plurality of mooring units and the plurality of mooring bollards in the other of the upper and lower parts of the screen. With this configuration, the mariner can know which mooring line coming out of which mooring unit is attached to which mooring bollard, which helps the mariner make a decision as to which mooring line tensions he should pay particular attention to.

[0073] In a third aspect, from the second aspect, the present disclosure provides a mooring line tension monitoring system comprising a processing circuit that calculates the mooring line tension of a plurality of mooring machines based on the detection values ​​of load cells provided in each mooring machine, and the processing circuit displays on a display the trend of change in the current mooring line tension relative to the mooring line tension at a reference time in each of the plurality of mooring machines.

[0074] With the above configuration, crew members can grasp the trend of changes in the current mooring line tension relative to the reference mooring line tension for all mooring devices simply by looking at the display, and can determine whether the mooring line tension needs to be readjusted. This means that crew members do not need to patrol the deck regularly, reducing the burden on crew members.

[0075] In a fourth aspect, in the third aspect, the change trend may include an increase or decrease in the current mooring line tension relative to the reference mooring line tension, and an amount or rate of change in the current mooring line tension relative to the reference mooring line tension, and the processing circuit may display the change trend on the display using a symbol corresponding to the change trend. With this configuration, the mariner can determine the change trend of the current mooring line tension relative to the reference mooring line tension from the symbol.

[0076] As a fifth aspect, in the fourth aspect, for example, the processing circuit may change the size, shape, or color of the symbol depending on the change trend.

[0077] In a sixth aspect, in the third aspect, the change trend may include an increase or decrease in the current mooring line tension relative to the reference mooring line tension, and an amount or rate of change in the current mooring line tension relative to the reference mooring line tension, and the processing circuit may display the change trend on the display in a color corresponding to the change trend. With this configuration, the crew can distinguish the change trend of the current mooring line tension relative to the reference mooring line tension from the color.

[0078] As a seventh aspect, in any of the first to sixth aspects, the reference time may be, for example, after completion of mooring work or after readjustment of mooring rope tension during mooring.

[0079] In an eighth aspect, in any of the first to seventh aspects, the processing circuit may switch the screen to be displayed on the display between a home screen and an individual screen corresponding to each of the multiple mooring units, and may display on the home screen the positions of the multiple mooring units on the ship and the mooring line tension at a reference time and the current mooring line tension for each of the multiple mooring units, or may display on the individual screen the position of the multiple mooring units on the ship and the trend of change in the current mooring line tension relative to the mooring line tension at a reference time for each of the multiple mooring units, and may display on the individual screen the progress of the mooring line tension of the mooring unit corresponding to that individual screen and a predicted change in the mooring line tension using an arrow. With this configuration, the crew can understand how the mooring line tension will change in the future by looking at the individual screen of each mooring unit.

[0080] As a ninth aspect, in the eighth aspect, for example, the processing circuit may predict future changes in mooring line tension based on at least one of sea state information and weather information.

[0081] In a tenth aspect, in the ninth aspect, the processing circuit may predict future changes in mooring line tension based on tidal change prediction information as the sea condition information, and display on the individual screen the progress of the mooring line tension of the mooring machine corresponding to that individual screen and the tidal changes included in the tidal change prediction information in the same graph. With this configuration, when a crew member looks at the graph on the individual screen, he or she can understand the relationship between the progress of the mooring line tension and the tidal changes.

[0082] In an eleventh aspect, in any of the eighth to tenth aspects, the processing circuit may predict future changes in mooring line tension based on at least one of sea state information and weather information and the transition of mooring line tension from the present to a predetermined time ago. This configuration improves the accuracy of predictions of future changes in mooring line tension.

[0083] In a twelfth aspect, in any of the first to eleventh aspects, the processing circuit may determine, for each of the plurality of mooring units, which of a plurality of regions the tension range up to the design load of the mooring unit falls into, and the plurality of regions may be assigned different colors, and the current mooring line tension may be displayed in the color of the region it falls into. With this configuration, the crew can determine from the color whether the current mooring line tension is in a safe region or a severe region.

[0084] As a thirteenth aspect, in any of the first, second, and seventh to twelfth aspects, the processing circuit may display on the display a scale divided into two or more areas to the side of a tension display frame that displays the mooring line tension of each mooring machine, the two or more areas being colored differently from each other, and may display a bar indicating the current mooring line tension within the tension display frame in the same color as the corresponding scale area. With this configuration, the scale shows when the color of the current mooring line tension will change, making it easier for the crew to understand the situation.

Claims

1. A mooring line tension monitoring system comprising a processing circuit that calculates the mooring line tension of multiple mooring machines based on the detection values ​​of load cells provided on each mooring machine and displays the calculated mooring line tension on a display, said processing circuit displaying the reference mooring line tension and the current mooring line tension of each of said multiple mooring machines on said display.

2. A mooring line tension monitoring system as claimed in claim 1, wherein said processing circuit displays on a display the positions of a plurality of mooring bollards arranged on a fixed structure, displays the mooring line tensions of said plurality of mooring lines in one of the upper and lower parts of the screen of said display, and displays the engagement pattern between said plurality of mooring machines and said plurality of mooring bollards in the other of the upper and lower parts of the screen.

3. A mooring line tension monitoring system comprising a processing circuit that calculates the mooring line tension of multiple mooring machines based on the detection values ​​of load cells provided on each mooring machine, said processing circuit displaying on a display the trend of change in the current mooring line tension relative to the reference mooring line tension at each of said multiple mooring machines.

4. A mooring line tension monitoring system as described in claim 3, wherein the change trend includes an increase or decrease in the current mooring line tension relative to the mooring line tension at the reference time, and the amount or rate of change in the current mooring line tension relative to the mooring line tension at the reference time, and the processing circuit displays the change trend on the display using a symbol corresponding to the change trend.

5. A mooring line tension monitoring system as set forth in claim 4, wherein said processing circuitry varies the size, shape or color of said symbol depending on said change trend.

6. A mooring line tension monitoring system as described in claim 3, wherein the change trend includes an increase or decrease in the current mooring line tension relative to the mooring line tension at the reference time, and the amount or rate of change of the current mooring line tension relative to the mooring line tension at the reference time, and the processing circuit displays the change trend on the display in a color corresponding to the change trend.

7. A mooring rope tension monitoring system as claimed in any one of claims 1 to 6, wherein the reference time is after completion of mooring operations or after readjustment of mooring rope tension during mooring.

8. A mooring line tension monitoring system as claimed in any one of claims 1 to 6, wherein the processing circuit switches the screen to be displayed on the display between a home screen and an individual screen corresponding to each of the plurality of mooring units, and displays on the home screen the positions of the plurality of mooring units on the ship and the mooring line tension at the reference time and the current mooring line tension at each of the plurality of mooring units, or displays on the home screen the positions of the plurality of mooring units on the ship and the trend in the current mooring line tension relative to the mooring line tension at the reference time at each of the plurality of mooring units, and displays on the individual screen the progress of the mooring line tension of the mooring unit corresponding to the individual screen, and displays a predicted change in the mooring line tension in the future with an arrow.

9. A mooring line tension monitoring system as set forth in claim 8, wherein the processing circuit predicts future changes in mooring line tension based on at least one of sea state information and weather information.

10. A mooring line tension monitoring system as described in claim 9, wherein the processing circuit predicts future changes in mooring line tension based on tidal change prediction information as the sea condition information, and displays on the individual screen the progress of the mooring line tension of the mooring machine corresponding to that individual screen and the tidal changes included in the tidal change prediction information on the same graph.

11. A mooring line tension monitoring system as described in claim 8, wherein the processing circuit predicts future changes in mooring line tension based on at least one of sea condition information and weather information and the change in mooring line tension from the present to a predetermined time ago.

12. A mooring line tension monitoring system as claimed in any one of claims 1 to 6, wherein the processing circuit determines, for each of the plurality of mooring units, which of the tension ranges up to the design load of the mooring unit is divided into a plurality of regions to which the current mooring line tension belongs, the plurality of regions being assigned different colours, and the current mooring line tension is displayed in the colour of the region to which the mooring line tension belongs.

13. A mooring line tension monitoring system as claimed in claim 1 or 2, wherein the processing circuit displays on the display a scale divided into two or more areas to the side of a tension display frame that displays the mooring line tension of each mooring unit, with the two or more areas being coloured differently from each other, and displays a bar indicating the current mooring line tension within the tension display frame in the same colour as the corresponding scale area.

Images