JP6778924B2 - Wave measuring device, wave measurement information transmission system, and floating body - Google Patents

Description

The present invention relates to a wave measuring device, a wave measuring information transmission system, and a floating body.

Information on waves is important information for floating bodies such as ships and marine structures to avoid danger, for example. Since the floating body is shaken by the waves, it is necessary to consider the shaking of the floating body when measuring the waves around the floating body using a sensor.
For example, in Patent Document 1, a water level sensor is used to measure the relative water levels of three or more points separated from each other of the hull, and if the water level sensor is of a type that cannot cancel the influence of the hull posture, a further calculation is performed to perform a relative water level. The method of estimating the wave height and wave direction of the incident wave from the measured values of is described. Although the hull motion detecting means is described in Patent Document 1, the relationship between the wave height and the wave direction of the incident wave is not described at all from the measured value of the relative water level.
Further, in Patent Document 2, from the detection signals of vertical acceleration, pitching and rolling detected at a predetermined part of the hull, the error due to the displacement of the vertical movement of the ship is removed from the wave height detected at an arbitrary part of the hull. In the ultrasonic wave height meter, the displacement due to the vertical movement at the mounting location of the ultrasonic sensor installed at an arbitrary location is calculated from the shaking detected at one point, and the displacement is transmitted by the ultrasonic sensor so that this displacement can be removed. It is described that the timing or the reception timing is corrected.
Further, in Patent Document 3, the average wave length, the wavelength and frequency of the spectrum peak are calculated based on the measurement data from the vertical acceleration sensor and the wave height meter attached to the bow, and the wave characteristics can be extracted. The wave characteristic pouring device is described.
Further, in Patent Document 4, the response characteristics of at least three of the up-and-down movement, the left-right movement, the front-back movement, the roll-up, the pitch-swing, and the bow-swing of a large floating body are estimated in advance by simulation, water tank experiment, etc. Describes a method for measuring wave height, wave direction, wave period, etc. by obtaining a response characteristic curve, measuring the vertical acceleration of an actual floating body, and performing calculations based on the acceleration data and the sway response characteristic curve. Has been done.

Japanese Unexamined Patent Publication No. 2011-21391 Japanese Unexamined Patent Publication No. 5-34450 Japanese Patent No. 2934564 Japanese Unexamined Patent Publication No. 2002-13923

However, the estimation method of Patent Document 1 requires complicated arithmetic processing.
Further, in the case of correction using the vertical acceleration measured as in Patent Document 2 or 3, that is, in the ship 300 provided with the accelerometer 301 and the wave height meter 302 as shown in FIG. 7, the wave height meter 302 to the ultrasonic wave 303 When the wave height measured by irradiating the sea surface toward the sea surface is corrected by the measured value of the accelerometer 301, it is necessary to provide an automatic horizontal table 304 or the like to remove the influence of the inclination of the accelerometer 301.
Further, FIG. 6 is a schematic side view showing a ship equipped with a wave measuring device examined by the inventors during the research of the present invention. As shown in FIG. 6, in a ship 200 equipped with a GPS receiver 201 and a plurality of wave height meters 202, the displacement of the entire hull is acquired by a gyro and an accelerometer, and the displacement of each wave height meter 202 is obtained from the gyro and the accelerometer data. And using the calculation result, it is conceivable to irradiate the wave height meter 202 toward the sea surface to correct the measured wave height. In this way, the vertical displacement of the wave height meter 202 is corrected for the hull. When calculating from the total displacement, the hull may be distorted by a dozen millimeters due to waves, resulting in a large error and poor measurement accuracy.

Therefore, an object of the present invention is to provide a wave measuring device, a wave measurement information transmission system, and a floating body capable of accurately measuring waves when the floating body is navigating or anchored.

In the wave measuring device corresponding to the first aspect, the attitudes of the liquid level detecting means for detecting the change in the height of the liquid level around the floating body and the liquid level detecting means arranged in the vicinity of the liquid level detecting means are measured. a movement measuring means comprises angle adjusting means for adjusting the angle between the liquid surface and the liquid surface detecting means, is corrected on the basis of the detection result of the liquid level detecting means to the angle measurements and angle adjusting means movement measuring means It is characterized in that the wave is measured and the angle is changed by the angle adjusting means within the range of the liquid level where the wave generated from the floating body can be avoided as the floating body navigates .
Here, the "range of the liquid level that can avoid the waves generated from the floating body" is a range that is not affected by the waves created by the floating body.
According to the first aspect of the present invention, the angle adjusting means for adjusting the detection result of the liquid level detecting means with the measurement result of the motion measuring means arranged in the vicinity thereof and the angle formed by the liquid level and the liquid level detecting means. By correcting the angle and measuring the waves, it is possible to avoid the influence of the waves caused by the hull and measure accurately. On the other hand, when the posture of the floating body is measured and the detection value of the liquid level detecting means is corrected based on the result as in the conventional case, an error caused by the position of the measuring means of the floating body posture and the position of the liquid level detecting means may occur. The measurement accuracy of waves is inferior due to the influence of strain generated on the floating body due to waves. Further, if the liquid level detecting means is not accompanied by the angle adjusting means, the angle cannot be adjusted according to the shaking of the floating body, and it is difficult to avoid the influence of the wave generated by the floating body itself.
Further, for example, the influence of the wake wave (Kelvin wave) generated by the floating body can be reduced and the wave can be measured more accurately. The wake is created in a range that is 19.5 degrees to the left and right of the central axis of the floating body from the front of the floating body (tip during navigation) regardless of the speed and size of the floating body, so it is outside this wave. By measuring the wave, it is possible to avoid the influence of the wake wave and the wave reflected from the floating body and detect an accurate change in the liquid level.
Further, by changing the angle of the motion measuring means, it is possible to detect an object other than the wave within the detection range, so that it can be applied to obstacle detection other than the wave measurement. For example, it is possible to prevent a collision by detecting the approach of a small vessel such as a fishing boat.

The present invention according to claim 2 is characterized in that the angle adjusting means simultaneously changes the angle of the motion measuring means with respect to the liquid surface.
According to the second aspect of the present invention, the wave is further increased by simultaneously changing the angle of the motion measuring means with respect to the liquid surface and performing correction to eliminate the sway of the floating body and the influence of the wave caused by the floating body due to the angle adjustment. It can be measured accurately .

請Motomeko 3 invention described is characterized to adjust the liquid level detecting means at an angle to detect the water level of the floating body at an angle adjusting means when the floating body stops.
According to the third aspect of the present invention, the liquid level detecting means can be switched to a measurement point different from that at the time of cruising when stopped. For example, when a floating body is navigating, it is possible to measure the trim angle, heel angle (lateral inclination), rolling, pitching, heave (vertical sway), etc. during navigation. Further, when the floating body is not navigating (during berthing, etc.), the trim angle, heel angle, etc. of the floating body can be measured. By obtaining this information, it goes without saying that the measurement results can be used for the navigation of floating bodies, and for example, it is possible to take measures against load collapse and load in a well-balanced manner, which is useful for avoiding the danger of floating bodies.

The present invention according to claim 4 is characterized in that the detection result of the liquid level detecting means is corrected based on the adjusted angle of the angle adjusting means.
According to the fourth aspect of the present invention, the liquid level detecting means applies the detection result obtained at an angle to the liquid level to the measurement directly obtained by the wave height measurement, and converts it into an appropriate value. be able to.

The present invention according to claim 5 is characterized in that the angle adjusting means changes the angle so that the measurement points of the liquid level become the same point when the floating body is shaken.
According to the fifth aspect of the present invention, even if the floating body is shaken, by measuring the same point on the liquid surface, more accurate wave height measurement at the same place becomes possible.

The present invention according to claim 6 is characterized in that the liquid level detecting means, the motion measuring means, and the angle adjusting means are configured as one module.
According to the sixth aspect of the present invention, modularization facilitates the installation and maintenance of the device.

The present invention according to claim 7 is characterized in that three or more modules are installed on a floating body.
According to the seventh aspect of the present invention, the wave direction spectrum can be calculated by processing the detection result of the liquid level detecting means and the measurement result of the motion measuring means for each module.

The present invention according to claim 8 is characterized in that the module is installed in front of a floating body.
According to the eighth aspect of the present invention, the degree of freedom in the installation position of other modules can be increased by installing the module in front of the floating body. Further, for example, it is possible to measure waves closer to the hull within a range in which the wake wave (Kelvin wave) generated by the floating body does not spread.

The present invention according to claim 9 is characterized in that microwaves are used as the liquid level detecting means.
According to the ninth aspect of the present invention, it is not affected by air bubbles generated by the navigation of the floating body as in the case of using ultrasonic waves. Further, unlike the case of using a light wave, there is no phenomenon that the light wave is not reflected from the sea surface because it is highly transmitted to the seawater, and the change in the liquid level can be detected accurately and surely. Further, since it can be detected if it is a microwave reflector, it is possible to detect obstacles other than waves.

The invention of claim 10, wherein the information about the future of wave from wave measurement result or ocean wave measurement result obtained from the wave measurement device as recited in one of claims 1 to 10, to the floating body of the occupant or passenger It is characterized by being provided with a means for transmitting information.
According to the tenth aspect of the present invention, the measurement result can be notified to the occupant or the passenger. Based on the results, the occupants or passengers can take appropriate risk avoidance actions, for example.

The present invention of claim 11 wherein is characterized by mounting the wave measuring apparatus or wave measurement information transmission system according to the floating body to one of the claims 11 claim 1.
According to the eleventh aspect of the present invention, it is possible to provide a floating body provided with a wave measuring device capable of accurately measuring waves.

According to the wave measuring device of the present invention, when the liquid level detecting means, the motion measuring means arranged in the vicinity thereof, and the angle adjusting means for adjusting the angle formed by the liquid level detecting means are provided, the liquid level detecting means The hull causes the wave by correcting the detection result based on the measurement result of the motion measuring means arranged in the vicinity thereof and the angle of the angle adjusting means for adjusting the angle formed by the liquid level and the liquid level detecting means. It is possible to avoid the influence of waves and measure waves accurately.
In addition, when the angle is changed by the angle adjusting means to the range of the liquid level where the wave generated from the floating body can be avoided due to the navigation of the floating body, the wake wave or the floating body is measured by measuring the wave outside this wave. It is possible to avoid the influence of waves reflected from the surface and detect accurate changes in liquid level.

In addition, when the angle adjusting means changes the angle of the motion measuring means with respect to the liquid surface at the same time, the correction that reduces the measurement error of the motion measuring means due to the angle adjustment and eliminates the shaking of the floating body and the influence of the wave caused by the floating body. By performing this, the waves can be measured more accurately .

Also, when adjusting the liquid level detecting means at an angle to detect the water level of the floating body when the floating body of the stop at an angle adjusting means, to switch the liquid level detecting means or running at a different measurement point in stopping, floating body It is possible to measure the trim angle, heel angle, etc. By obtaining this information, it goes without saying that the measurement results can be used for the navigation of floating bodies, and for example, it is possible to take measures against load collapse and load in a well-balanced manner, which is useful for avoiding the danger of floating bodies.

Further, when the detection result of the liquid level detecting means is corrected based on the angle adjusted by the angle adjusting means, the detection result obtained by the liquid level detecting means at a certain angle with respect to the liquid level is measured. It can be applied to the measurement obtained directly in and converted to an appropriate value.

In addition, when the angle adjusting means changes the angle so that the measurement points on the liquid level are the same when the floating body is shaken, the same points on the liquid surface are measured even if the floating body is shaken. , More accurate liquid level measurement at the same location becomes possible.

Further, when the liquid level detecting means, the motion measuring means, and the angle adjusting means are configured as one module, the installation and maintenance of the device becomes easy.

Further, when three or more modules are installed on the floating body, the wave direction spectrum can be calculated by processing the detection result of the liquid level detecting means and the measurement result of the motion measuring means.

Further, when the module is installed in front of the floating body, the degree of freedom in the installation position of other modules can be increased. For example, it is possible to measure waves closer to the hull outside the range in which the wake waves (Kelvin waves) generated by the floating body spread.

Further, when microwaves are used as the liquid level detecting means, changes in the liquid level can be detected accurately and reliably without being affected by air bubbles generated during the navigation of the floating body.

In addition, when the wave measurement information transmission system provided with the wave measurement result obtained from the wave measurement device or the information regarding future waves from the wave measurement result is transmitted to the occupants or passengers of the floating body, the measurement result is obtained. Can be reported to the occupants or passengers, and the occupants or passengers can take appropriate risk avoidance actions based on the results, for example.

Further, when the wave measuring device or the wave measurement information transmission system is mounted on the floating body, it is possible to provide the floating body provided with the wave measuring device capable of accurately measuring the wave.
In addition, the wave measurement results can be used to improve the efficiency of cargo handling and maintain safety during voyage.

Schematic side view showing a ship provided with a wave measuring device according to an embodiment of the present invention. Schematic perspective view showing a ship provided with a wave measuring device according to another embodiment of the present invention. The figure which shows the connection of each device in the wave measurement information transmission system of this invention. Perspective view of the module of the wave measuring device of the present invention The figure which shows the connection and information transmission of each device in the wave measurement information transmission system of this invention. Schematic side view showing a ship equipped with a wave measuring device examined in the process of the present invention. Schematic side view showing a ship equipped with a conventional wave measuring device

The wave measuring device according to the embodiment of the present invention and the floating body including the wave measuring device will be described below.

FIG. 1 is a schematic side view showing a floating body including a wave measuring device according to an embodiment of the present invention. In FIG. 1, the right side surface of the floating body (ship) 1 is visible. The wave measuring device according to the present embodiment includes a plurality of water level sensors (liquid level detecting means) 11 for detecting changes in the liquid level (sea level) height around the ship 1. The water level sensor 11 is a microwave water level sensor using a patch antenna and irradiates the microwave 16 toward the liquid surface. It is possible to use ultrasonic waves or light waves (lasers), but by using microwaves 16, the bubbles generated during the cruising of the ship 1 are not affected as in the case of using ultrasonic waves. Further, unlike the case where a light wave is used, the transmission to the seawater is large and the liquid wave is not reflected from the sea surface, and the change in the liquid level can be detected accurately and surely. The microwave water level sensor is realized by using, for example, a microwave 16 in the 24 GHz band.

A gyro sensor 12 (motion measuring means) is arranged in the vicinity of each water level sensor 11, and a computer 13 is arranged in the vicinity of the water level sensor 11 and the gyro sensor 12. Further, an angle adjusting means 18 for adjusting the angle of the water level sensor 11 with respect to the liquid level (sea level) is arranged.
The water level sensor 11, the gyro sensor 12, the computer 13, the network communication means 14 such as a router, and the angle adjusting means 18 are configured as one module 10. Modularization facilitates the installation and maintenance of the device.
Two modules 10 are arranged on the right side surface of the ship 1 at predetermined intervals in the front-rear direction, and two modules 10 are also arranged symmetrically with the right side surface on the left side surface of the ship 1. When there is a height from the sea surface to the freeboard like a PCC (car carrier), the effect of seawater injection is small, so it can be attached to the side of the hull as shown in Fig. 1, but a ship with a low freeboard such as a tanker. Then, it is preferable to install it above the side of the hull in order to avoid the influence of seawater injection.
The total of four modules 10 are networked by connecting via their respective network communication means 14. The communication between the modules 10 may be wired or wireless. By modularizing each water level sensor 11 and mounting the network communication means 14, the water level sensor 11 (module 10) can be easily added.

The gyro sensor 12 is an ultra-compact 6-DOF gyro such as a MEMS (Micro Electro Mechanical Systems), and measures the posture of the water level sensor 11.
The computer 13 processes the detection result of the water level sensor 11, the measurement result of the gyro sensor 12, and the angle of the angle adjusting means 18 to measure the wave. That is, the computer 13 removes the influence of the sway (tilt or rotational movement) of the ship 1 based on the posture of the water level sensor 11 measured by the gyro sensor 12 from the change in the liquid level measured by the water level sensor 11, and the angle. Accurate wave measurement is performed by correcting the influence of the angle adjustment based on the angle of the adjusting means 18.
By removing the influence of the sway of the ship 1 and the influence of the angle adjustment of the angle adjusting means 18 from the change in the liquid level measured by the water level sensor 11 in this way, the wave can be accurately measured. If the angle adjusting means 18 adjusts the angle of the water level sensor 11 with respect to the liquid level (sea level), the detection result of the water level sensor 11 will be different even if the wave height is the same. Therefore, in order to accurately measure the waves, it is necessary to correct the detection result of the water level sensor according to the angle of the angle adjusting means 18. This correction is performed by the computer 13 together with the correction of the influence of the sway when the ship 1 is shaken by the wave and the detection result of the water level sensor 11 is different even if the height of the wave is the same.
Further, by using the gyro sensor, a horizontal holding device such as an automatic horizontal table, which is required when using an accelerometer, becomes unnecessary. Further, since the posture of the water level sensor 11 used as the correction value can be accurately measured by directly measuring it with the gyro sensor 12 arranged in the vicinity thereof, the wave can be accurately measured. On the other hand, when the posture of the entire ship 1 is measured and the detected value of the water level sensor 11 is corrected based on the result as in the conventional case, the position of the posture measuring means of the ship 1 and the position of the water level sensor 11 are set. The measurement accuracy of the wave is inferior due to the influence of the hull strain generated on the ship 1 due to the error caused by the distance and the wave. For example, if an acceleration sensor is provided near the center point of pitching or rolling of the hull as a means for measuring the attitude of the ship 1, the detection value as the acceleration sensor becomes small because there is little shaking near the center point. However, since the water level sensor 11 is provided at a position away from the center point, the acceleration is large and the displacement is large. Therefore, if the acceleration sensor and the water level sensor 11 are separated from each other, correct correction cannot be performed. In addition, the hull may be distorted by a dozen millimeters due to the waves, which increases the error and deteriorates the measurement accuracy. Further, the computer 13 calculates based on the posture of the water level sensor 11 measured by the gyro sensor 12 of the angle adjusting means 18, adjusts so as to eliminate the influence of the sway (tilt or rotational movement) of the ship 1, and adjusts the water level sensor 11. The measurement points can be kept constant at all times.
Further, since the computer 13 is arranged in the vicinity of the water level sensor 11, the gyro sensor 12, and the angle adjusting means 18, the detection result of the water level sensor 11, the measurement result of the gyro sensor 12, and the adjustment of the angle adjusting means 18 are adjusted for each module 10. Waves can be measured by processing the angle.

Further, the computer 13 measures the wave direction by analyzing the temporal change of the change in the liquid level measured by the plurality of water level sensors 11. By analyzing the temporal change of the detection result of the water level sensor 11 in this way, it is possible to measure the wave direction and predict the development of the wave, for example, to help avoid the danger of the ship 1.

The result (measurement data) of measuring the wave (including the wave direction) is stored in a storage unit such as a memory of the computer 13 for each module 10, and is transmitted by the network communication means 14 to the computer connected to the network. 13 are exchanged with each other. The exchanged data is also stored in the storage unit of the computer 13 of each module 10. In this way, the wave measurement data can be transmitted to the outside of the module 10 by the network communication means 14. Further, by exchanging and sharing the wave measurement data between the computers 13, it is possible to create a backup in case of data loss.
When the bridge or the like is provided with a main computer that controls the computer 13, the wave measurement data may be transmitted to the main computer and stored in the storage unit of the main computer.

Further, the computer 13 is provided with a failure detection function of another module 10 by communication of the network communication means 14. For example, the presence or absence of a response signal when a confirmation signal is periodically transmitted from the main computer or the soundness confirmation unit of each module 10 to another module 10, or the exchange of wave measurement data is completed normally. Whether or not all of the plurality of other modules 10 in the network are operating normally is determined based on whether or not the modules are operating normally.
When the failure detection function determines that a failure has occurred in some of the modules 10 in the network, the computer 13 of the other healthy module 10 performs a process of excluding or substituting the failed module 10 from the wave measurement. , Continue wave measurement with other healthy modules 10.
In this way, the module 10 is provided with a failure detection function, and when it is detected that a failure has occurred in any of the modules 10, the function of measuring waves in the other sound module 10 is maintained, so that the network Even if a part of the modules 10 fails, the wave measurement can be continued by another sound module. Therefore, it is possible to construct a highly reliable system that is resistant to failure.

Further, the computer 13 measures the posture or sway of the ship 1 based on the measurement result of the gyro sensor 12. That is, the inclination and rotational motion of the ship 1 can be measured from the posture of the water level sensor 11 measured by the gyro sensor 12. For example, when the ship 1 is sailing, it is possible to measure the trim angle, heel angle, rolling, pitching, heave (vertical swing), and the like during sailing. Further, when the ship 1 is moored, the trim angle, heel angle, etc. of the ship 1 can be measured. By obtaining this information, the measurement results can be used for the navigation of the ship 1, and for example, measures against collapse of cargo and well-balanced loading can be taken to help avoid the danger of the ship 1. At the time of berthing, the angle adjusting means 18 can change the measurement direction of the module 10 to a substantially vertical direction so that the measurement point of the water level sensor 11 is optimal for measuring the trim angle, heel angle, and the like.
Further, the measurement direction of the module 10 is directed to a substantially vertical direction, and the height of the water level sensor 11 from the liquid level (sea level) can be measured more accurately, which can be useful for calculating the draft of the ship 1. Accurately grasping the height of the water level sensor 11 from the liquid level (sea level) is useful for accurate wave measurement.

The computer 13 can also measure the trim angle and the heel angle in addition to the draft of the ship 1. That is, the change in attitude is measured from each draft detected by the four water level sensors 11 during cargo handling of the ship 1 using the water level sensor 11. By grasping the change in posture (trim angle, heel angle) due to the cargo handling of the berthed ship 1, the measurement result can be useful for performing well-balanced loading and the like when the ship 1 is berthed. Further, in obtaining the change in draft during cruising, correction can be performed based on both or one of the measurement result of the angle adjusting means 18 and the measurement result of the gyro sensor 12.

Further, the ship 1 is provided with a display device (information transmission means) 15. The wave measurement results of the plurality of modules 10 are transmitted to the display device 15 via the network communication means 14 and displayed on the display device 15. By installing the display device 15 on, for example, a bridge, it is possible to immediately notify the occupants of the result of wave measurement. The crew can use the result to help the ship 1, for example, to avoid danger.
The display device 15 may also be installed in the cabin so that the passengers can be notified of the result of the wave measurement. In this case, it is possible to alert the passengers based on the result of the wave measurement, for example, by displaying that the wave height is high and prohibiting them from appearing on the deck.

The computer 13 measures the power spectrum of the wave by analyzing the temporal change of the detection result of the water level sensor 11. Waves may be measured by this. In this case, the significant wave height (statistically processed wave height, which is close to the visual wave height) is obtained from the 0th-order moment of the wave power spectrum, and the 0th-order moment of the wave power spectrum and 2 Find the average wave period from the next moment.
In addition, the visiting direction of the wave can be known by obtaining the direction spectrum. Furthermore, it is possible to predict the development of waves from the temporal changes of the significant wave height and the average wave period. Based on the significant wave height, average wave period, wave visit direction, and development prediction, it can be useful for avoiding danger of ship 1, for example.

As described above, the ship 1 uses a plurality of modules 10 to measure wave height, wave period, wave direction, trim angle, heel angle, rolling, pitching, heave (up and down), etc. during navigation. However, at the time of berthing, the draft, heel angle, trim angle, etc. can be measured, and the information can be reported to the occupants and the like by the display device 15. In addition, the measurement results can be processed to predict the significant wave height, average wave period, wave visit direction, development prediction, and the like.
Therefore, the ship 1 can notify the crew and passengers of the measurement result and the processing result, or reflect the measurement result and the processing result in the control of the ship 1, and take an appropriate danger avoidance action such as changing the route while avoiding the dangerous sea area. In addition, the measurement results and prediction results can be useful for accumulating marine image data in the sea area.

Next, a floating body including a wave measuring device and a wave measuring device according to another embodiment of the present invention will be described with reference to FIG.
FIG. 2 is a schematic perspective view showing a floating body including the wave measuring device according to the present embodiment. The same functional members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.
Vessel 100 is a tanker and has a protrusion (bridge wing) 101 on the bridge. Of the four water level sensors 11, the water level sensors 11A and 11B on the rear side are attached to the bridge wing 101. Since the bridge wing 101 projects laterally from the side surface of the hull of the ship 100, the water level sensors 11A and 11B can detect a change in the liquid level away from the ship 100 within a predetermined range. Further, by attaching the water level sensors 11A and 11B to the bridge wing 101, the influence of seawater injection can be avoided.
Here, the "predetermined range" is, for example, a range affected by the waves produced by the ship 100. Since the wake wave (Kelvin wave) 102 generated by the ship 100 is in a range opened 19.5 degrees to the left and right from the front of the bow regardless of the speed and size of the ship, by measuring the waves outside this wave, Accurate changes in liquid level can be detected.
The adjustment angles of the water level sensors 11C and 11D on the front side and the water level sensors 11A and 11B on the rear side are directed to an angle avoiding the wake wave (Kelvin wave) 102 at each position, that is, toward the liquid level away from the ship 100 by a predetermined range. It is set outward and downward from the hull. Therefore, the predetermined range is different between the front side and the rear side, and the adjustment angles of the front side water level sensors 11C and 11D and the rear side water level sensors 11A and 11B are different.
The angle adjusting means 18 adjusts the angles of the water level sensors 11C and 11D and the water level sensors 11A and 11B so as to avoid the wake wave (Kelvin wave) 102.
The wake wave (Kelvin wave) 102 generated by the cruising of the floating body spreads to the left and right with the traveling direction of the floating body as the apex. Therefore, the angle adjusting means 18 is set so that the angle formed by the water level sensors 11A and 11B and the side surface of the hull is larger than the angle formed by the water level sensors 11C and 11D and the side surface of the hull.
Therefore, the microwave 16 is irradiated obliquely downward from the water level sensor 11 toward the liquid surface. Since the water level sensors 11A and 11B on the rear side are provided on the bridge wing 101, it is necessary to increase the angle of the water level sensors 11A and 11B on the rear side so much even in the rear where the width of the cruising wave (Kelvin wave) 102 is widened. It disappears and measurement becomes possible without reducing the returning microwave 16. Irradiating the microwave 16 from the water level sensor 11 diagonally downward toward the liquid surface also leads to avoiding the reflected wave of the hull where the wave hits the hull and bounces off.
Further, since the wake wave (Kelvin wave) 102 is not generated while the ship 100 is moored, the adjustment angle of the water level sensors 11C and 11D on the front side facing outward is angled when measuring the draft during mooring. It is changed inward by the adjusting means 18, and a change in the height of the liquid level closer to the hull is detected. Similarly for the water level sensors 11A and 11B on the rear side, when measuring the draft while moored, the adjustment angle that was directed outward is changed inward to change the height of the liquid level closer to the hull. To detect. In this way, while moored, the adjustment angle of the water level sensor 11 is changed inward to detect a change in the height of the liquid level substantially directly below the water level sensor 11, but the water level sensor 11 is placed in a portion of the hull where there is no flare. When attaching the water level sensor 11 to the bridge wing 101 which is about the same length as the ship width, there is an obstacle below the water level sensor 11 that interferes with the measurement, and the change in the height of the liquid level directly below can be seen. If it cannot be detected, the adjustment angle is set to an oblique direction slightly outward from directly below, and a change in the height of the liquid level slightly away from the ship 100 is detected.
Further, in the present embodiment, although the gyro sensor 12 is arranged in the vicinity of the water level sensor 11, it is not integrated, but it may be integrated in the same manner as in the above-described embodiment.

Next, the connection of each device such as the module 10 will be described with reference to FIG.
FIG. 3 is a diagram showing the connection of each device in the wave measurement information transmission system of the present invention. The connection of each device shown in FIG. 3 can be applied to both the wave measuring device of the embodiment described with reference to FIG. 1 and the wave measuring device of the embodiment described with reference to FIG.
The four modules 10 included in the ship 1 each have a water level sensor 11, a gyro sensor 12, a computer 13, a network communication means 14, and an angle adjusting means 18, respectively, and have a wired inboard LAN (Local Area Network) via the network communication means 14. ) It is connected to 20. Further, the computer 13 has a storage unit 17 such as a memory for storing the result of measuring the wave. The angle adjusting means 18 is attached to the floating body as a part of the module 10. The angle adjusting means 18 can change the angle of the module 10 to adjust the angle formed by the water level sensor 11 with respect to the liquid level (sea level).
Although a wireless LAN can be used for the inboard LAN 20, it is preferable to use a wired LAN from the viewpoint of ensuring communication reliability.
Further, electric power is supplied to each module 10 through the inboard LAN 20. As for the power supply, various methods can be adopted without using the onboard LAN 20.

A display device 15, a central control device 30, and a setting means 40 are provided on the bridge of the ship 1.
The central control device 30 includes a main computer 31 and a network communication means 32. The central control device 30 is connected to the inboard LAN 20 via the network communication means 32.
Measurement results (measurement data) such as wave height, wave period, wave direction, trim angle, heel angle, rolling, pitching, and heave (vertical sway) of ship 1 measured by each module 10 during cruising, and at berth. Measurement results (measurement data) such as draft, heel angle, and trim angle are stored in the respective storage units 17 and transmitted to the central control device 30. The transmitted measurement result (measurement data) is processed by the main computer 31 of the central control device 30, and the processing result is stored in the storage unit 33 such as the memory of the main computer 31 and displayed on the display device 15. ..
In addition, the main computer 31 processes the measurement result (measurement data) to predict the significant wave height, the average wave period, the wave visit direction, the development prediction, and the like. That is, the significant wave height is obtained from the 0th-order moment of the wave power spectrum, the average wave period is obtained from the 0th-order moment and the 2nd-order moment of the wave power spectrum, and the direction spectrum is obtained to predict the wave visiting direction. Predict wave development from significant wave height and mean wave period temporal changes.

The setting means 40 sets the start or stop of the entire wave measuring device, sets the measurement contents at the time of cruising and berthing of the wave measuring device, sets the switching, and the like. The setting contents of the setting means 40 are transmitted to the central control device 30, and the central control device 30 controls and controls each module 10 according to the received setting contents.

It should be noted that the processing of the measurement result (measurement data) such as the wave height and the prediction of the significant wave height etc. performed by processing the measurement result (measurement data) should be arbitrarily shared by each module 10 and the central control device 30. Can be done.
Further, the computer 13 may not be provided in each module 10, and the measurement result (measurement data) may be processed by the central control device 30.
In addition, the central control device 30 is not provided, and each module 10 can share the processing of the measurement result (measurement data).

Next, the connection of each device of the module 10 will be described with reference to FIG. FIG. 4 is a diagram showing a configuration of a device (module) constituting a part of the wave measurement information transmission system of the present invention. The module 10 has a water level sensor 11, a gyro sensor 12, a computer 13, a network communication means 14, and an angle adjusting means 18, and is connected to a wired inboard LAN (Local Area Network) 20 via the network communication means 14. .. Further, the computer 13 has a storage unit 17 such as a memory for storing the result of measuring the wave. Of the above functions, the gyro sensor 12 and the computer 13 are provided in either the main body of the containment vessel 50 or the angle adjusting means 18 having waterproof performance. In FIG. 4, as shown by the solid line, the gyro sensor 12 is provided in the main body of the angle adjusting means 18, and the computer 13 is provided in the containment vessel 50. As shown by the dotted line, the gyro sensor 12 and the computer 13 may be arranged in reverse. Further, both may be provided on either the main body of the angle adjusting means 18 or the containment vessel 50.
The angle adjusting means 18 includes a driving electric motor 51, a rotation decelerating means 52, and a rotation angle detector 53, and the main body may also include a gyro sensor 12, a computer 13, and a network communication means 14. In this case, it is connected to the wired inboard LAN (Local Area Network) 20 via the network communication means 14. Further, electric power is supplied to each module 10 through the inboard LAN 20. As for the power supply, various methods can be adopted without using the onboard LAN 20.

The connection of each of the above devices will be described with reference to FIG. FIG. 5 is a diagram showing information transmission of the wave measurement information transmission system of the present invention. Each of the modules 10 is connected to a wired inboard LAN (Local Area Network) 20 via a network communication means 14. The module 10 is connected to the central control device 30 through the inboard LAN. The central control device 30 sets control conditions by the setting means 40, and processes the information obtained from the module 10 according to the settings. The central control device 30 has functions of noise processing, sensor correction processing, wave height calculation processing, directional wave calculation processing, wave avoidance direction calculation processing, and wave information transmission processing (hull sway information, wave visit direction, avoidance support information, etc.). ing. The central control device transmits wave visit direction avoidance support information, hull sway information, and safety information to the display devices 15 (15A, 15B) through the inboard LAN 20, respectively. There is no restriction on what is displayed on the display devices 15A and 15B for the wave visit direction avoidance support information, hull sway information, and safety information. Further, the display devices 15A and 15B may be either one, or may be installed in another place such as an engine room.

Since the wave measuring device of the present invention can measure waves with high accuracy, it is possible to accurately measure waves and maintain the safety of the floating body by coping with changes in waves by mounting it on a floating body such as a ship or an offshore structure. Can be done. It can also be applied to measure waves using a floating model in a large actual sea area water tank or the like, and can also be applied to wave measurement in a water tank using a liquid in which various adjusting agents are mixed with water.

1 Ship (floating body)
10 Module 11 Water level sensor (liquid level detection means)
12 Gyro sensor (motion measuring means)
13 Computer 14 Network communication means 15 Display device (information transmission means)
16 Microwave 18 Angle adjusting means 50 Containment vessel

Claims (11)

A liquid level detecting means for detecting a change in the height of the liquid level around the floating body, a motion measuring means for measuring the movement of the liquid level detecting means arranged in the vicinity of the liquid level detecting means, and the liquid level and the liquid. An angle adjusting means for adjusting the angle formed by the surface detecting means is provided, and the detection result of the liquid level detecting means is corrected based on the measurement result of the motion measuring means and the angle of the angle adjusting means to measure the wave . Moreover, the wave measuring device is characterized in that the angle is changed by the angle adjusting means within the range of the liquid level that can avoid the wave generated from the floating body as the floating body navigates . The wave measuring device according to claim 1, wherein the angle adjusting means simultaneously changes the angle of the motion measuring means with respect to the liquid surface. The wave measuring device according to claim 1 or 2 , wherein the angle adjusting means adjusts the liquid level detecting means to the angle at which the water level of the floating body is detected when the floating body is stopped. Detection result, wave measuring apparatus as recited in one of claims 1 to 3, characterized in that the correction based on the adjusted the angle of the angle adjusting means of the liquid level detecting means. The wave according to any one of claims 1 to 4 , wherein the angle adjusting means changes the angle so that the measurement points of the liquid level become the same point when the floating body is shaken. Measuring device. The wave measuring device according to any one of claims 1 to 5 , wherein the liquid level detecting means, the motion measuring means, and the angle adjusting means are configured as one module. The wave measuring device according to claim 6 , wherein three or more of the modules are installed on the floating body. The wave measuring device according to claim 6 or 7 , wherein the module is installed in front of the floating body. Wave measuring apparatus as recited in one of claims 1 to 8, characterized in that using a microwave as said level detecting means. A means for transmitting information regarding a wave measurement result obtained from the wave measurement device according to claim 1 to claim 9 or information on future waves from the wave measurement result to the occupant or passenger of the floating body. A wave measurement information transmission system characterized by the fact that. A floating body characterized in that the wave measuring device or the wave measurement information transmission system according to claim 1 to claim 10 is mounted on the floating body.