JP2007033360A - Structure of buoy for measurement of wave crest value - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buoy for measurement of a wave crest value, which is small-sized and low-cost and precisely measures the crest value. <P>SOLUTION: The fins 3 are provided under or on the flange 2 extending on the surface perpendicularly to the vertical axis from the circumference of the barrel 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a buoy that floats on the surface of the sea, and more particularly to the structure of a crest measuring buoy.

  Conventionally, buoys have been used that measure various data such as atmospheric pressure and water temperature floating on the surface of the sea, drifting to the sea surface, and obtaining their position with a GPS receiver and transmitting those data. An example of such a buoy is shown in FIG.

  The data measuring buoy 40 has a cylindrical body 1 with a body portion, and a flange 2 that extends horizontally from the draft line of the body portion so as not to be affected by wind and tidal currents. Such a buoy measures the atmospheric pressure, water temperature, position, etc. at sea and transmits from the antenna 4 provided on the top, and there are few that measure the wave height.

  Another example of a conventional data measurement buoy is shown in FIG. This data measurement buoy 50 also includes the same spherical body 1, flange 2 and antenna 4 as shown in FIG. 4, and further has bottom fins 11, 11,... Extending vertically downward from the bottom of the spherical body 1. It was provided.

  As shown in FIG. 7A, a buoy for measuring the crest value has a gyro sensor 14 (accelerometer) enclosed in a cylinder filled with oil in a cylindrical body 12 and is cylindrical. A flange 13 extending in the horizontal direction is provided around the cylindrical body 12, and a transmitting antenna 4 is provided at the center of the top of the cylindrical body 12. This buoy keeps the G-sensor (accelerometer) 14 with gyro itself stationary even if the cylindrical body 12 rotates about the vertical axis.

  When measuring the peak value, the buoy shown in FIG. 4 moves up and down so that the flange 2 follows the wavefront 5 as shown in FIG. 5A, and the arrow in FIG. The acceleration of the magnitude indicated by the length of G is applied.

  However, when the body portion 1 is affected by wind and waves and rotates around the central axis as shown in FIG. 5B, the acceleration caused by the rotation is added to the acceleration due to the up and down of the wavefront 5, and FIG. A large acceleration indicated by the length of the arrow G1 is applied to b). When the acceleration value is integrated twice in time, the wave height can be obtained. However, as described above, the conventional buoy shown in FIG. 4 is difficult to obtain the actual wave height value due to the influence of rotation. It was rarely used.

  The buoy proposed in Japanese Patent Application Laid-Open No. 61-212729 was also provided with a ring-shaped object (flange), but no fin was attached to the ring-shaped object.

  The conventional buoy described in FIG. 6 has a large buoy size when the diameter of the spherical body 1 is the same, and the fin is attached to the spherical surface, so that the strength of the fin is insufficient. Furthermore, since the fin is not attached to the flange portion, there is a problem that the strength of the flange is insufficient. Further, since the fins are located close to the central axis, there is a problem that the function as a damper for stopping the rotation cannot be sufficiently performed.

  7A, the conventional crest value measuring buoy is rotated as shown in FIG. 7B, and the acceleration of the cylindrical body 12 is large as indicated by the arrow G1. Even so, since the G sensor 11 with the gyroscope is not affected by the rotation, the acceleration of only the vertical movement indicated by the G arrow is measured. Then, peak value data that is not affected by rotation can be transmitted.

However, since the gyro of the G sensor 14 with the gyro has a large number of parts and requires assembling accuracy, a skilled assembling worker is required, and the manufacturing cost is increased and the gyro is also increased in weight. There was a problem of increasing the size.
JP-A-61-212729, specification, page 2, lower left column, FIG.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a peak value measuring buoy capable of measuring a peak value accurately with a small size and low manufacturing cost.

  In the buoy for measuring a peak value according to the present invention, a lower surface or an upper surface of a flange extending on the surface perpendicular to the vertical axis from the periphery of the body portion and a fin extending in the vertical direction from the surface of the body portion are provided.

  Further, in the structure of the peak value measuring buoy, the body portion is a prism or cylinder, the flange is formed to extend from the water line of the body portion, and the fin extends from the lower surface of the flange. It is formed.

  Further, in the structure of the same peak value measuring buoy, the body portion is spherical, the flange is formed in a donut-shaped disk shape coaxial with the body portion extending from the waterline of the body portion, and the fin is the flange. It is formed so as to extend from the lower surface.

  In addition, in the structure of each peak value measuring buoy, in addition to the flange extending from the waterline, a flange extending on the surface perpendicular to the vertical axis from the periphery of the trunk is provided in the underwater portion, and both of these flanges are provided. The fin is provided.

  According to the buoy for measuring a crest value of the present invention, the crest value can be accurately measured with a small size and a low manufacturing cost.

  The best mode for carrying out the present invention will be described below with reference to examples.

    1A is a front view showing a peak value measuring buoy 20 according to Embodiment 1 of the present invention, FIG. 1B is a bottom view showing the peak value measuring buoy 20, and FIG. It is a front view which shows the state which put the buoy 20 for a crest value measurement on the horizontal surface.

  Reference numeral 1 shown in the figure denotes a spherical body, an antenna 4 is provided on the top, and a donut-shaped disc-shaped flange 2 is provided so as to extend from the water line of the spherical body 1. Six substantially triangular fins 3, 3,... Are integrally formed at equal intervals in the circumferential direction between the lower surface of the flange 2 and the surface of the spherical body 1. As shown in FIG. 1, when the radius of the spherical body 1 is r, the radius of the flange 2 is 1.4r, the height and width of the fin 3 are 0.3r, and the distance from the center axis of the tip of the fin 3 is 1.3r.

  FIG. 1C shows a state where the peak value measurement buoy 20 is placed on a horizontal base. The spherical body 1 is supported by the surface of the spherical body 1 and the fins 3, and a clearance indicated by C is generated between the flange 2 and the horizontal base, and the flange 2 is deformed by the weight of the crest 20 for measuring the peak value. Is prevented.

  FIG. 2A is a front view showing a state in which the same peak value measuring buoy 20 is floated on the horizontal wavefront 5. FIG. 2B is a front view showing the same peak value measuring buoy 20 floating on the inclined wavefront 5. It is a front view which shows a state. As shown in FIG. 2B, even when the peak value measuring buoy 20 is moved up and down by the wave and receives a force in the rotational direction due to the wave, the fins 3, 3. First, acceleration of only substantially vertical movement indicated by the arrow G is measured, and peak value data that is not affected by rotation can be transmitted.

  The fins 3, 3... Serve as reinforcement of the flange 2, and the fins 3, 3... Are also supported so as to be sandwiched between the spherical body 1 and the flange 2, so that a large rigidity against deformation is obtained. Thus, since the crest for measuring the crest value of Example 1 does not use a gyro, it is small in size, the manufacturing cost is reduced, and an accurate crest value can be obtained.

  3A is a plan view showing a peak value measuring buoy 30 according to Embodiment 2 of the present invention, FIG. 3B is a front view showing the peak value measuring buoy 30, and FIG. It is a bottom view showing a peak value measurement buoy 30. In this example, as shown in FIG. 3B, four waterline flanges 7, 7... Extend from the waterline (on the wavefront 5) of the cylindrical body 6 at equal intervals in the circumferential direction.

  .. Are integrally formed between the lower surface of the waterline flanges 7, 7... And the surface of the cylindrical body 6. In this example, small underwater flanges 9, 9... Extending in the underwater portion are provided. .. Are integrally formed between the upper surface of the underwater flanges 9, 9... And the surface of the cylindrical body 6. Since the fins 10, 10... Also act as dampers with respect to the rotation of the cylindrical body 6, the effect of preventing the rotation is further enhanced.

  The embodiment is configured as described above, but the invention is not limited thereto. For example, the shape of the flange may be a square, a triangle, an ellipse, or the like, and even if the entire circumference is connected, it is notched. May be. Further, the effect of the present invention can be obtained even when the shape of the body of the buoy is a spherical shape, a conical shape other than a cylindrical shape, a spheroidal shape, a rectangular parallelepiped shape or the like.

1A is a front view showing a peak value measuring buoy according to Embodiment 1 of the present invention, FIG. 1B is a bottom view showing the peak value measuring buoy, and FIG. It is a front view which shows the state which set | placed the measurement buoy on the horizontal surface. 2A is a front view showing a state in which the same peak value measuring buoy is floating on a horizontal wavefront, and FIG. 2B is a front view showing a state in which the same peak value measuring buoy is floating on an inclined wavefront. FIG. 3 (a) is a plan view showing a peak value measuring buoy according to Embodiment 2 of the present invention, FIG. 3 (b) is a front view showing the same peak value measuring buoy, and FIG. 3 (c) is the same peak value. It is a bottom view showing a measurement buoy. It is a front view which shows the example of the conventional data measurement buoy. It is a front view which shows the example of the use condition of the buoy for data measurement. It is a front view which shows the other example of the conventional data measurement buoy. FIG. 7A is a front view showing an example of a conventional peak value measurement buoy. FIG.7 (b) is a front view which shows the example of the use condition of the buoy for the same peak value measurement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spherical trunk | drum 2 Flange 3 Fin 4 Antenna 5 Wavefront 6 Cylindrical trunk | drum 7 Waterline flange 8 Fin 9 Underwater flange,
10 Fin 11 Bottom Fin 12 Cylindrical Body 13 Flange 14 G Sensor with Gyro 20 High Value Measurement Buoy 30 High Value Measurement Buoy 40 Data Measurement Buoy 50 Data Measurement Buoy 60 Wave Height Measurement Buoy

Claims (4)

A structure of a peak value measurement buoy provided with a lower surface or an upper surface of a flange extending on a surface orthogonal to a vertical axis from the periphery of the body portion and fins extending in a vertical direction from the surface of the body portion. 2. The peak value measurement buoy according to claim 1, wherein the trunk portion has a prismatic shape or a cylindrical shape, the flange is formed so as to extend from a water line of the trunk portion, and the fin is formed so as to extend from a lower surface of the flange. Structure. The said trunk | drum is spherical, The said flange is formed in the donut-shaped disk shape coaxial with the said trunk | drum extended from the waterline of the said trunk | drum, The said fin was formed so that it might extend from the lower surface of the said flange. The structure of a buoy for measuring the crest value of. The flange extending from the periphery of the trunk portion on the surface orthogonal to the vertical axis in addition to the flange extending from the water line is provided, and the fins are provided on both of these flanges. Structure of a buoy for peak value measurement described in any one of the above.

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