JP5769850B1 - Moored balloon - Google Patents

Abstract

To provide a moored balloon that is less likely to increase the inclination of the balloon even when the balloon receives an air flow. A mooring balloon 1 according to the present invention includes a balloon 10, a plurality of mooring lines 30 to 33 each having one end connected to the surface of the balloon 10, and a line length adjusting unit 50. The cable length adjusting unit 50 adjusts the length of any of the plurality of mooring cables 30 to 33 according to the wind speed of the airflow received by the balloon 10. The mooring balloon 10 according to the present invention may further include a film-like scoop 20 that is joined to the surface of the balloon 10 and connected to the mooring line whose length is adjusted by the rope length adjusting unit 50. [Selection] Figure 1

Description

  The present invention relates to a mooring balloon.

  When the operation of the base station is stopped due to a disaster or the like, a communication failure that prevents communication of a mobile terminal such as a mobile phone occurs in an area covered by the base station that has stopped the operation. When a communication failure occurs, it is required to quickly recover the base station that has stopped operating to eliminate the communication failure. However, there are cases where it is difficult to quickly restore the functions of the base station, such as when the base station collapses.

  On the other hand, a mooring balloon having a balloon and a mooring line connected to the balloon for mooring the balloon is known. Moored balloons are used for surveying the wind speed in the sky when constructing large structures such as wind power generators, surveying the vertical distribution of wind speed and temperature, etc., and taking pictures to check the damage situation at the time of disaster It is known. However, the mooring balloon may not be able to maintain an appropriate position when subjected to strong winds.

  Patent Document 1 describes a mooring balloon that can be positioned appropriately even when subjected to strong winds. The mooring balloon described in Patent Document 1 includes a balloon and a mooring line connected to the balloon, and also has a scoop that functions to keep the balloon in an appropriate position even when the balloon receives a strong wind. The scoop is formed of a porous material so as to provide the balloon with the appropriate air resistance to keep the balloon in place.

US Pat. No. 5,065,163

  The inventor of the present application covers a base station that has stopped operating by installing a relay station that replaces the function of the base station in a balloon when it is difficult to quickly recover the base station that has stopped operating due to a disaster or the like. I found that I could quickly recover from the communication failure in my area. By raising the balloon carrying the relay station to an altitude of about 100 [m] and mooring it, a relay station covering an area with a radius of 3 [km] or more can be realized.

  However, when a flat balloon is used as a balloon on which a relay station is mounted, the balloon may be tilted when the balloon receives an air current. Flat-shaped balloons preferably have a projected area as seen from the direction of the airflow received by the balloon, but the inclination of the balloon increases by receiving the airflow, and the projected area as seen from the direction of the airflow increases. To do.

  An object of the present invention is to provide a moored balloon that is less likely to increase the inclination of the balloon even when the balloon receives airflow.

  In order to achieve the above object, a mooring balloon according to the present invention includes a balloon that becomes flat when gas is filled therein, a plurality of mooring lines each having one end connected to the surface of the balloon, and the balloon A cable length adjusting unit that adjusts the length of any of the plurality of mooring lines according to the wind speed of the received airflow.

  In the mooring balloon according to the present invention, it is preferable that the rope length adjusting unit includes an elastic member that adjusts the length of any one of the plurality of mooring lines.

  In the mooring balloon according to the present invention, the length of the elastic member when any tension is not applied to the elastic member is shorter than the length of the predetermined portion of any one of the plurality of mooring lines. Are preferably connected in parallel.

  In the mooring balloon according to the present invention, the elastic member has a hollow portion formed therein, and when tension is not applied to the elastic member, a predetermined portion of the mooring lines connected in parallel is arranged in the hollow portion. It is preferable.

  Further, in the moored balloon according to the present invention, the rope length adjusting unit detects the inclination angle of the balloon with respect to a predetermined direction, and the length of the mooring line is determined according to the inclination angle detected by the inclination detection unit. It is preferable to have a cable length determining unit to determine and a cable length changing unit to change the length of the mooring cable so as to have the length determined by the cable length determining unit.

  Moreover, it is preferable that the mooring balloon according to the present invention further includes a film-like scoop that is joined to the surface of the balloon and connected to the mooring line whose length is adjusted by the rope length adjusting unit.

  According to the present invention, there is provided a moored balloon that is less likely to increase the inclination of the balloon even when the balloon receives an airflow.

It is a perspective view of the mooring balloon which concerns on 1st Embodiment located in the air. (A) is a partial cross-sectional side view of the balloon shown in FIG. 1, and (b) is a bottom view of the balloon shown in (a). It is a top view of the scoop shown in FIG. It is a figure which shows the connection relation of the cable length adjustment member which concerns on 1st Embodiment, and the mooring line to which the cable length adjustment member was connected, (a) is a figure which shows the state by which the tension | tensile_strength is not applied to the mooring line. (B) is a figure which shows the state in which the tension | tensile_strength is applied to the mooring cable. It is a figure which shows the comparison with the conventional mooring balloon and the mooring balloon which concerns on embodiment, (a) shows the case where the conventional balloon receives little airflow from a horizontal direction, (b) is the case of (a) 2 shows a projection plane of a balloon viewed from the airflow direction of FIG. 1. (c) shows a case where a conventional balloon receives an airflow with a high wind speed from the horizontal direction, and (d) shows from the airflow direction at (c). The balloon projection plane is shown, (e) shows the case where the balloon receives little airflow from the horizontal direction, (f) shows the balloon projection plane seen from the airflow direction at (e), (f) Indicates a case where the balloon receives an air flow with a high wind speed from the horizontal direction, and (g) indicates a projection plane of the balloon viewed from the air flow direction at (f). It is a figure which shows the connection relation of the cable length adjustment member which concerns on 2nd Embodiment, and the mooring line to which the cable length adjustment member was connected, (a) is a figure which shows the state by which the tension | tensile_strength is not applied to the mooring line. Yes (b) is a diagram showing a state in which tension is applied to the mooring line. It is a figure which shows the connection relation of the rope length adjustment apparatus which concerns on 3rd Embodiment, and the mooring line to which the rope length adjustment apparatus was connected, (a) is a figure which shows the state in which the tension | tensile_strength is not applied to the mooring line. (B) is a figure which shows the state in which the tension | tensile_strength is applied to the mooring cable. It is a functional block diagram of the cable length adjustment system which concerns on 4th Embodiment.

  A mooring balloon according to the present invention will be described with reference to the following drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, and extends to equivalents to the invention described in the claims.

  The mooring balloon according to the embodiment adjusts the length of one of the mooring lines according to the wind speed of the airflow so as to keep the inclination of the balloon constant regardless of the wind speed of the airflow received by the flat balloon. It has an adjustment part. One example of the cord length adjusting unit is an elastic member that adjusts the length of any one of a plurality of mooring cords, and another example of the cord length adjusting unit is the length of the mooring cord according to the inclination angle of the balloon with respect to a predetermined direction. It is a cable length adjustment system that changes the height. In the mooring balloon according to the embodiment, the rope length adjusting unit adjusts the length of the mooring line according to the wind speed of the airflow, so that the inclination of the balloon can be kept constant.

  FIG. 1 is a perspective view of a mooring balloon according to a first embodiment located in the air.

  The mooring balloon 1 includes a balloon 10, a scoop 20, first to third mooring lines 30 to 32, a main mooring line 33, a relay station 40, and a rope length adjusting member 50.

  FIG. 2A is a partial cross-sectional side view of the balloon 10 filled with gas inside, and FIG. 2B is a bottom view of the balloon 10 filled with gas inside.

  The balloon 10 includes an outer bag 11, a helium storage bag 12, an air storage bag 13, a payload dome 14, and three mooring line attachment portions 15. Since the balloon 10 has a double structure of the helium storage bag 12 and the air storage bag 13 and the outer bag 11, the outer bag 11 does not need to be formed of a material having gas barrier properties. The outer bag 11 is formed of a rigid, lightweight and air-tight material such as synthetic fiber. The helium storage bag 12 is a bag filled with helium, and is formed of a material that is lower in strength and durability than the outer bag 11 and is light in weight. For example, the helium storage bag 12 is formed by welding a plastic film. The air storage bag 13 is made of a lightweight material that has lower strength and durability than the outer bag 11. Similar to the helium storage bag 12, the air storage bag 13 is formed by welding a plastic film. The payload dome 14 is a cylindrical member with a bottom, and is arranged so that the bottom is in contact with the air storage bag 13. The payload dome 14 is made of a rigid and lightweight material such as polystyrene foam. A relay station 40 is disposed in the concave portion of the payload dome 14.

  The balloon 10 has a spheroid shape having a minor axis in the height direction when the helium storage bag 12 is filled with helium and the air storage bag 13 is filled with air. That is, when the inside is filled with gas, the balloon 10 has a flat shape having a circular plane shape and an elliptical front shape. In one example, the balloon 10 has a circular planar shape with a diameter of 4.6 [m], and an elliptical front shape with a major axis of 4.6 [m] and a minor axis of 2.66 [m].

  The three mooring line attachment portions 15 are arranged on the surface of the balloon 10 so as to follow the long diameter when viewed from the front. Each of the three mooring line attachment portions 15 is connected to one end of any one of the first to third mooring lines 30 to 32. One end of the first mooring line 30 is connected to the mooring line attachment part 15 arranged at a position close to the part to which the scoop 20 is joined, and the second mooring line 31 is connected to the other two mooring line attachment parts 15. And one end of the 3rd mooring line 32 is connected, respectively.

  FIG. 3 is a plan view of the scoop 20.

  The scoop 20 is a film material having a flexible surface 21 formed of polyester woven so as to transmit air from one surface to the other surface. The scoop 20 is also referred to as a posture stabilizing film. The scoop 20 includes a base 23, a first equilateral side 24 and a second equilateral side 25 connected at one end at an apex angle 28 positioned opposite to the base 23, and a first equilateral side 24 and a second equilateral side 25 from both ends of the base 23. It has a shape surrounded by a first cutout side 26 and a second cutout side 27 that extend to the other end. The first equal side 24 and the second equal side 25 are equal in length to each other, and the first cut-out side 26 and the second cut-out side 27 are equal in length to each other. That is, the scoop 20 is formed in an isosceles triangle shape with a base corner portion notched. The scoop 20 is joined to the balloon 10 in the vicinity of the base 23, the first cut-out side 26, and the second cut-out side 27. A connection line 29 that connects the scoop 20 and the first mooring line 30 is connected to the apex angle 28 of the scoop 20. By connecting the apex angle 28 of the scoop 20 and the first mooring line 30 via the connection line 29, when the mooring balloon 1 is raised in the air, the scoop 20 receives wind like a sail of a yacht. Thus, the mooring balloon 1 is stabilized in the wind so that the scoop 20 becomes leeward.

  Each of the first to third mooring lines 30 to 32 is formed of a material that is not cut by the tension caused by the airflow received when the mooring balloon 1 is in the air. One end of the first mooring line 30 is connected to the mooring line attaching part 15 disposed at a position close to the portion where the scoop 20 is joined, and one end of each of the second mooring line 31 and the third mooring line 32 is the other. Connected to the two mooring line attachment portions 15. The other ends of the first to third mooring lines 30 to 32 are connected to one end of the main mooring line 33 at the node 34. In one example, the other end of each of the first to third mooring lines 30 to 32 at the node 34 and one end of the main mooring line 33 are connected via a connection fitting. The first mooring line 30 is connected to the apex angle of the scoop 20 via the connection line 29. In one example, the first mooring line 30 and the connection line 29 are connected via a connection fitting.

  The length of the first mooring line 30 is longer than the lengths of the second mooring line 31 and the third mooring line 32, and the lengths of the second mooring line 31 and the third mooring line 32 are equal to each other.

  Similar to the first to third mooring lines 30 to 32, the main mooring line 33 is formed of a material that is not cut by the tension caused by the airflow received when the mooring balloon 1 is in the air. The other end of the main mooring line 33 is connected to a winch (not shown). When the main mooring line 33 is unwound from the winch connected to the other end of the main mooring line 33, the mooring balloon 1 rises in the air according to the unwinding amount, and when the main mooring line 33 is wound from the winch, The mooring balloon 1 descends from the air according to the winding amount.

  The relay station 40 has a relay antenna and a mobile station antenna (not shown), and is between a base station connected to the mobile communication network and a mobile terminal located in an area covered by the base station. A communication network.

  The cord length adjusting member 50 is an elastic member that is connected to a position near the node 34 of the first mooring line 30 so as to be parallel to a part of the first mooring line 30. In one example, the cord length adjusting member 50 may be formed of a flat rubber string also called flat rubber or coal rubber, or may be formed of a spring.

  FIG. 4 is a diagram showing a connection relationship between the first mooring line 30 and the line length adjusting member 50. FIG. 4A is a diagram showing a state in which no tension is applied to the first mooring line 30, and FIG. 4B is a diagram showing a state in which a tension is applied to the first mooring line 30.

  The cable length adjusting member 50 is connected in parallel to the first mooring cable 30 at the first connection part 51 and the second connection part 52. Since the rope length adjusting member 50 is connected in parallel with the first mooring line 30, when a tension is applied to the first mooring line 30, the tension is also applied to the rope length adjusting member 50. The length between the 1st connection part 51 and the 2nd connection part 52 of the cable length adjustment member 50 when tension is not applied is La. Further, the length between the first connection portion 51 and the second connection portion 52 of the first mooring line 30 is longer than the length La between the first connection portion 51 and the second connection portion 52 of the rope length adjusting member 50. Is also a long Lb. Since the length La between the connecting portions of the cable length adjusting member 50 when no tension is applied is shorter than the length Lb between the connecting portions of the first mooring cable 30, when the tension is not applied, The part between the connection parts of the 1 mooring line 30 is slack.

  The length La between the connecting portions of the rope length adjusting member 50 is the length between the mooring rope attaching portion 15 and the first connecting portion 51 and the second connecting point 34 and the second when the balloon 10 is not receiving airflow. The sum of the length between the connecting portion 52 and the connecting portion 52 is defined to be equal to the length of the second mooring line 31 and the third mooring line 32. The length Lb between the connecting portions of the first mooring line 30 is set so that the length of the line length adjusting member 50 becomes a desired length when the balloon 10 receives an air flow at a predetermined wind speed. It is defined in consideration of the Young's modulus of the material forming the film. In one example, the length Lb between the connecting portions of the first mooring line 30 is such that when the balloon 10 receives an air flow with a wind speed of 5 [m / s] from the horizontal direction, the major axis direction of the balloon 10 becomes the horizontal direction. It is prescribed as follows. In this specification, when the balloon receives airflow from the horizontal direction, it means that the airflow received by the balloon has a horizontal component, and when the balloon does not receive the balloon from the horizontal direction, the airflow received by the balloon is horizontal. It means having no ingredients. In addition, when the balloon receives an airflow of wind speed X [m / s] from the horizontal direction, it means that the horizontal component of the airflow received by the balloon is X [m / s] regardless of the direction of the airflow.

  When the tension applied by the airflow received by the balloon 10 increases, the cord length adjusting member 50 increases the length according to the applied tension. And if the length of the cord length adjusting member 50 becomes equal to the length Lb between the first connecting portion 51 and the second connecting portion 52 of the first mooring cord 30, even if the applied tension increases, The length of the cord length adjusting member 50 does not increase. Further, when the tension applied by the air flow received by the balloon 10 decreases, the cord length adjusting member 50 shortens the length from Lb according to the applied tension. When the applied tension becomes zero, the length of the cord length adjusting member 50 returns to La.

  FIG. 5 is a diagram showing a comparison between the conventional mooring balloon and the mooring balloon 1 according to the embodiment. FIG. 5A shows a case where a conventional balloon receives almost no airflow from the horizontal direction, and FIG. 5B shows a projection plane of the balloon viewed from the airflow direction in FIG. 5A. . FIG. 5 (c) shows a case where a conventional balloon receives an air flow having a high wind speed from the horizontal direction, and FIG. 5 (d) shows a projection plane of the balloon viewed from the air flow direction in FIG. 5 (c). It is. FIG. 5E shows a case where the balloon 10 receives almost no airflow from the horizontal direction, and FIG. 5F shows a projection plane of the balloon 10 viewed from the airflow direction in FIG. . FIG. 5 (f) shows a case where the balloon 10 receives an air flow having a high wind speed from the horizontal direction, and FIG. 5 (g) shows a projection plane of the balloon 10 viewed from the air flow direction in FIG. 5 (f). It is. 5 (a), 5 (c), 5 (e), and 5 (g), the arrows indicate the airflow received by the balloon. In FIG. 5 (d), the solid line shows the projection plane of the balloon viewed from the airflow direction in FIG. 5 (c), and the broken line shows from the airflow direction in FIG. 5 (a) shown in FIG. 5 (b). Shows the projection plane of the balloon. In FIG. 5 (h), the solid line indicates the projection plane of the balloon 10 viewed from the airflow direction in FIG. 5 (g), and the broken line indicates the airflow direction in FIG. 5 (e) shown in FIG. 5 (f). Shows the projected plane of the balloon.

  The conventional mooring balloon 101 is different from the mooring balloon 1 in that it does not have the cord length adjusting member 50. The conventional mooring balloon 101 differs from the mooring balloon 1 in that the first to third mooring lines 130 to 132 are equal in length.

  In the conventional mooring balloon 101, the lengths of the first to third mooring lines 130 to 132 are equal to each other, so that the balloon 110 is positioned so that the major axis is in the horizontal direction when receiving almost no airflow from the horizontal direction. When the airflow is hardly received from the horizontal direction, the balloon 110 is positioned so that the major axis is in the horizontal direction. Therefore, the projection plane 190 of the balloon 10 viewed from the airflow direction is a projection plane when the balloon 10 is viewed from the front. Is approximately the same. However, the conventional tethered balloon 101 is inclined because the airflow received by the scoop 20 increases as the wind speed of the airflow received from the horizontal direction increases, and the projection plane of the balloon 110 viewed from the airflow direction as the wind speed of the airflow increases. 191 becomes larger.

  When the mooring balloon 1 receives almost no airflow from the horizontal direction, the balloon 110 is positioned so that the major axis is in the horizontal direction, like the conventional tethered balloon 101, and the projection plane 90 of the balloon 10 viewed from the airflow direction is , Substantially coincides with the projection plane when the balloon 10 is viewed from the front. In the mooring balloon 1, the rope length adjustment member 50 extends as the wind speed of the airflow received from the horizontal direction increases, so that the balloon 10 is connected to the first connection portion 51 and the second connection portion 52 of the rope length adjustment member 50. The balloon 110 maintains the state where the major axis is in the horizontal direction until the length between them becomes Lb. In the mooring balloon 1, the balloon 10 maintains a state in which the major axis is in the horizontal direction even when the wind speed of the air current increases. Therefore, the projection surface 91 of the balloon 10 viewed from the air flow direction is the balloon even if the wind speed of the air current increases. 10 substantially coincides with the projection plane when viewed from the front.

  In the mooring balloon 1, the cord length adjusting member 50 that extends as the wind speed of the airflow received by the balloon 10 increases is connected in parallel to a predetermined portion of the first mooring line 30 connected to the scoop 20. The rope length adjustment member 50 extends as the wind speed of the air current increases, so that the balloon 10 can maintain a constant inclination regardless of the wind speed of the air current received by the balloon 10.

  FIG. 6 is a diagram illustrating a connection relationship between the cable length adjusting member according to the second embodiment and the first mooring cable 30 to which the cable length adjusting member is connected. FIG. 6A is a view showing a state in which no tension is applied to the first mooring line 30, and FIG. 6B is a view showing a state in which a tension is applied to the first mooring line 30.

  In the second embodiment, instead of the cable length adjusting member 50, a cable length adjusting member 60 having a shape different from that of the cable length adjusting member 50 is connected in parallel to the first mooring cable 30.

  The cord length adjusting member 60 according to the second embodiment is an elastic member, like the cord length adjusting member 50, but the cord length adjusting member is formed with a through hole 61 penetrating from one surface to the other surface. 50. The first mooring line 30 is connected to the line length adjusting member 60 in the vicinity of one through surface of the through hole 61, and the line length adjustment of the first mooring line 30 is inserted into the through hole 61 of the line length adjusting member 50. A portion connected in parallel to the member 60 is connected to the cord length adjusting member 60 at the end of the through hole 61 and arranged. The length of the cord length adjusting member 60 when no tension is applied is La, and the length of the portion of the first mooring cord 30 connected in parallel to the cord length adjusting member 60 is Lb. The length La of the cord length adjusting member 50 is the same as the length La between the connecting portions of the cord length adjusting member 50, and the first mooring cord 30 via the cord length adjusting member 60 when the balloon 10 is not receiving airflow. Is defined to be equal to the lengths of the second mooring line 31 and the third mooring line 32. The length Lb of the portion connected in parallel to the cable length adjusting member 60 of the first mooring line 30 is the same as the length Lb between the connecting parts of the first mooring cable 30 and is made of the material forming the cable length adjusting member 50. It is defined in consideration of Young's modulus.

  In the rope length adjusting member 60, a portion connected in parallel to the rope length adjusting member 60 of the first mooring line 30 is disposed inside the through hole 61, so that it is connected in parallel to the rope length adjusting member 60 of the first mooring line 30. There is no fear that the part to be entangled with other cords. Further, in the rope length adjusting member 60, when the balloon 10 is wound down by a winch (not shown) and the balloon 10 is lowered from the air, a portion connected in parallel to the rope length adjusting member 60 of the first mooring line 30 is caught in the winch. There is no fear.

  In the rope length adjusting member 60, a through hole 61 penetrating from one surface to the other surface is formed, but the embodiment is not limited to the through hole 61, and the rope length adjusting member 60 of the first mooring line 30 is formed. It is only necessary that a space in which a portion connected in parallel is arranged in the cord length adjusting member 60.

  FIG. 7 is a diagram illustrating a connection relationship between the cable length adjusting device according to the third embodiment and the first mooring cable 30 to which the cable length adjusting device is connected. FIG. 7A is a view showing a state in which no tension is applied to the first mooring line 30, and FIG. 7B is a view showing a state in which a tension is applied to the first mooring line 30.

  In the third embodiment, a cable length adjusting device 70 is connected to the first mooring cable 30 instead of the cable length adjusting member 50.

  The cable length adjusting device 70 has a circular rotating part 71 joined to the first mooring cable 30. The rotating portion 71 has a mainspring spring 72 that functions to adjust the length of the first mooring line 30. When the applied tension increases, the rotating unit 71 unwinds the first mooring line 30 wound around the outer periphery. Moreover, when the tension | tensile_strength applied reduces, the rotation part 71 winds around the outer periphery and winds up the 1st mooring line 30. FIG. The rope length adjusting device 70 rotates the first mooring line 30 so that the length of the first mooring line 30 is equal to the length of the second mooring line 31 and the third mooring line 32 when no tension is applied. It is wound around the outer periphery of the part 71.

  FIG. 8 is a functional block diagram of a cable length adjustment system according to the fourth embodiment.

  In the fourth embodiment, a cable length adjusting system 80 that adjusts the length of the first mooring cable 30 according to the inclination angle of the balloon 10 is arranged instead of the cable length adjusting member 50 that is a cable elastic member.

  The cable length adjusting system 80 unwinds and winds the cable length control unit 81 disposed in the concave portion of the payload dome 14 of the balloon 10 adjacent to the relay station 40 and the first mooring cable 30. A cable length changing unit 82 for changing the length of the mooring cable 30; The cable length control unit 81 includes an inclination detection unit 811, a storage unit 812, a cable length determination unit 813, a cable length transmission unit 814, and a bus 815. The cable length changing unit 82 includes a cable length receiving unit 821, a motor driving unit 822, and a motor 823. In one example, the cable length changing unit 82 is a winch that unwinds and winds the first mooring cable 30 by the motor 823.

  The tilt detection unit 811 detects the tilt angle of the balloon 10 with respect to the horizontal direction, and outputs a tilt angle signal indicating the detected tilt angle to the storage unit 812. The storage unit 812 stores a tilt angle corresponding to the tilt angle signal input from the tilt detection unit 811 and a computer program (also referred to as a program in this specification) for the rope length determination unit 813 to execute processing. Remember. The rope length determining unit 813 is a length for unwinding or winding the first mooring cable 30 so that the major axis direction of the balloon 10 is horizontal, based on the program stored in the storage unit 812 and the inclination angle of the balloon. Is determined, and a cable length signal indicating the determined length is generated and output to the cable length transmitter 814. The cable length transmitting unit 814 modulates the cable length signal input from the cable length determining unit 813 into a radio signal, and transmits the radio signal to the cable length receiving unit 821 of the cable length changing unit 82. The bus 815 connects the inclination detection unit 811, the storage unit 812, the cable length determination unit 813, and the cable length transmission unit 814 to each other, and the inclination detection unit 811, the storage unit 812, the cable length determination unit 813, and the cable length transmission unit 814. Transmit signals between.

  The cable length receiving unit 821 demodulates the radio signal received from the cable length transmitting unit 814 into a cable length signal and outputs the signal to the motor driving unit 822. The motor drive unit 822 drives the motor 823 so as to unwind or wind up the first mooring line 30 having a length corresponding to the line length signal input from the line length transmission unit 814. The motor 823 unwinds or winds up the first mooring line 30 by the motor driving unit 822 so that the direction of the major axis of the balloon 10 is horizontal.

  In the cable length adjusting system 80, the cable length determining unit 813 determines the length of the first mooring line 30 according to the inclination angle detected by the inclination detecting unit 811, and the cable length changing unit 82 is used for the first mooring line 30. The length of the mooring line is changed so that the length becomes the length determined by the cable length determination unit 813.

  The cable length adjusting system 80 is formed so as to change the length of the first mooring line 30 connected to the scoop 20, but the cable length adjusting system is not the first mooring line 30 but the second mooring line 31. And you may form so that the length of the 3rd mooring line 32 may be changed. Moreover, you may form a rope length adjustment system so that the length of all the 3 mooring lines of the 1st mooring line 30, the 2nd mooring line 31, and the 3rd mooring line 32 may be changed.

  In the moored balloon according to the embodiment, since a constant inclination can be maintained with respect to the airflow received from the horizontal direction regardless of the wind speed of the airflow received by the balloon 10, the projected area of the balloon 10 with respect to the airflow is not substantially changed. In the moored balloon according to the embodiment, since the projected area of the balloon 10 with respect to the airflow received from the horizontal direction does not substantially change, the attitude of the balloon 10 can be maintained in an optimum state regardless of the wind speed of the airflow received by the balloon 10. The change in the posture of the balloon 10 when the balloon blows can be reduced. Further, in the moored balloon according to the embodiment, the posture of the balloon 10 can be maintained in an optimum state regardless of the wind speed of the airflow received by the balloon 10, so that there is no apparent instability when the balloon 10 is in the air. In the moored balloon according to the embodiment, the flat-shaped balloon 10 is substantially constant from the horizontal direction up to 20 [m / s] when the wind speed of the airflow received by the balloon 10 from the horizontal direction exceeds 5 [m / s]. It has been confirmed that the weather is stable with inclination.

  In the mooring balloon according to the embodiment, the cord length adjusting members 50 and 60, the cord length adjusting device 70, and the cord length adjusting system 80 function so that the direction of the major axis of the balloon 10 becomes the horizontal direction. However, the cord length adjusting members 50 and 60, the cord length adjusting device 70, and the cord length adjusting system 80 may be configured such that the direction of the major axis of the balloon 10 has a predetermined inclination with respect to the horizontal direction. For example, the length La between the connecting portions of the cord length adjusting member 50 is set to be the length of the first mooring cord 30 through the cord length adjusting member 50 when the balloon 10 is not receiving the air current, You may prescribe | regulate so that it may be shorter than the length of 3 mooring lines 32. By defining the length La between the connecting portions of the rope length adjusting member 50 in this way, the head 10 is in a head-up state in which the wind upper end of the balloon 10 is located above the wind lower end where the scoop 20 is disposed. Can do.

  In the moored balloon according to the embodiment, the balloon 10 has a spheroid shape having a minor axis in the height direction when the gas is filled therein, and the scoop 20 is joined. The embodiment is not limited to such an embodiment. For example, the shape of the balloon may be streamlined or donut-shaped, and may have a shape having a vertical tail or a shape having a vertical tail and a horizontal tail so as to stabilize the weather. In the case of having a structure for stabilizing the weather such as the scoop 20, the vertical tail and the horizontal tail, the rope length adjusting members such as the rope length adjusting members 50 and 60 are moored arranged on the leeward side of the first mooring line 30 and the like. It may be connected in parallel to the cable. When the structure for stabilizing the weather is not provided, the length adjusting members such as the length adjusting members 50 and 60 may be connected in parallel to all the first to third mooring lines 30 to 32.

  In the mooring balloon according to the embodiment, the balloon 10 is moored by the first to third mooring lines 30 to 32, but two or four or more mooring lines are used instead of the first to third mooring lines 30 to 32. May be arranged. In this case, the cable length adjusting members 50 and 60 are connected in parallel to either two or four or more mooring cables. The balloon 10 may be moored on the winch by the first to third mooring lines 30 to 32 without having the main mooring line 33.

DESCRIPTION OF SYMBOLS 1 Mooring balloon 10 Balloon 20 Scoop 30-34 Mooring cable 50, 60 Cable length adjustment member 70 Cable length adjustment apparatus 80 Cable length adjustment system

Claims (2)

A balloon that becomes flat when filled with gas,
A plurality of mooring lines, one end of which is connected to the surface of the balloon;
A cable length adjustment unit that adjusts the length of any of the plurality of mooring lines according to the wind speed of the airflow received by the balloon,
The cord length adjusting unit has an elastic member that adjusts the length of any one of the plurality of mooring cords,
The elastic member is connected in parallel to a predetermined portion of any one of the plurality of mooring lines so that the length when no tension is applied to the elastic member is shorter than the length of the predetermined portion. ,
A mooring balloon, wherein the elastic member has a hollow portion formed therein, and the predetermined portion is disposed in the hollow portion when no tension is applied to the elastic member. Wherein while being bonded to the surface of the balloon, further comprising a film-like scoop connected to the mooring lines to be adjusted in length by the cord length adjusting unit, tethered balloon according to claim 1.

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