Flying device and weather observation device

Abstract

To provide a flying device which uses a balloon used for weather observation etc. and enables proper adjustment of a flight altitude.SOLUTION: A flying device includes: a baloon in which a gas for generating a buoyant force is stored and a powder anti-adhesion agent for preventing adhesion of an inner surface adheres to the inner surface; and a gas discharge part which discharges the gas from the inside of the ballon to the outside through a mouth part in a lower part of the ballon. A suction port for suctioning the gas of the gas discharge part is located above a lowermost part in a ballon internal space.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a flying device using a balloon for carrying out meteorological observations and the like. [Background technology]

[0002] Conventionally, various observations and measurements, such as meteorological observations, have been carried out by using balloons to send instruments such as radiosondes into the atmosphere. In the case of unmanned balloons used for meteorological observations, the observations are usually carried out while ascending, and then the balloon bursts in the sky and descends gently using a parachute (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-143916 A Summary of the Invention [Problem to be solved by the invention]

[0004] Even in flying devices that use balloons for weather observations, such as those described above, there is a demand for the ability to appropriately control the flight altitude in order to maintain the flight altitude while conducting observations and to control the landing point.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a flying device that uses a balloon for use in meteorological observation and the like, and that is capable of appropriately adjusting the flight altitude. [Means for solving the problem]

[0006] The present invention has been made to solve the above problems, and the gist of the invention is as follows.

[0007] (1) A balloon containing a gas that generates buoyancy and having a powdered anti-adhesive agent attached to its inner surface to prevent the inner surface from sticking together; a gas exhaust section that exhausts the gas from inside the balloon to the outside through an opening at the bottom of the balloon, A flying device characterized in that a suction port of the gas exhaust section for sucking in the gas is located above the lowest part of the internal space of the balloon.

[0008] (2) The gas exhaust unit has a gas exhaust pipe that is inserted into the opening and exhausts the gas, The flying device described in (1) above, characterized in that the suction port arranged inside the balloon of the gas exhaust pipe is located above the lowest part.

[0009] (3) a plug is placed in the mouth portion; The flying device described in (2) above, characterized in that the gas exhaust pipe is inserted through the plug, and the suction port is located above the upper end of the plug.

[0010] (4) A controller for controlling the gas discharge process by the gas discharge unit, the gas exhaust unit further includes a gas on-off valve that opens and closes a gas flow path of the gas exhaust pipe, The flying device described in (2) or (3) above, wherein the controller controls the opening and closing of the gas on-off valve.

[0011] (5) Equipped with a position information measuring device that acquires at least flight altitude information of the flight device; The flying device described in (4) above, characterized in that the controller controls the opening and closing of the gas on-off valve based on the flight altitude information to control the flight altitude.

[0012] (6) a plug is placed in the mouth portion; A gas exhaust hole serving as the gas exhaust portion is formed in the plug, The flying device described in (1) above, characterized in that the suction port of the gas exhaust hole located inside the balloon is located above the lowest part.

[0013] (7) The flying device according to (2) or (6) above, characterized in that a filter that prevents the passage of powder is disposed at the suction port.

[0014] (8) A balloon containing a liquid and a gas that generates buoyancy, and having a powdered anti-adhesive agent attached to the inside to prevent the inner surface from sticking together; a liquid discharge part that discharges the liquid from inside the balloon to the outside through a mouth part at a lower part of the balloon, A flying device characterized in that a liquid suction port for sucking the liquid of the liquid discharge portion is located above the lowest part of the internal space of the balloon.

[0015] (9) The liquid discharge portion has a liquid discharge pipe that is inserted into the mouth portion and discharges the liquid, The flying device described in (8) above, characterized in that the liquid suction port arranged inside the balloon of the liquid discharge pipe is located above the lowest part.

[0016] (10) A plug is placed in the mouth portion, The flying device described in (9) above, wherein the liquid discharge pipe is inserted through the plug, and the liquid suction port is located above an upper end of the plug.

[0017] (11) A flight device according to any one of (1) to (8) above, A weather sensor for performing weather observation; A weather observation device comprising: Effect of the Invention

[0018] According to the present invention, it is possible to provide a flying device that uses a balloon for use in meteorological observation and the like, and that is capable of appropriately adjusting the flight altitude. [Brief description of the drawings]

[0019] [Figure 1] 1 is a schematic diagram of a flying device according to an embodiment. [Diagram 2] 10 is a flowchart showing a process for adjusting the flight altitude of a flying device. [Diagram 3] FIG. 2 is a schematic diagram of a flying device according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] (First embodiment) The flying device of this embodiment will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing the configuration of the flying device 1 of this embodiment. In this embodiment, the flying device 1 is described as being applied to a meteorological observation device that performs meteorological observation during flight. Note that the use of the flying device 1 of this embodiment is not limited to meteorological observation, and it may be used for other purposes.

[0021] The flying device 1 includes a balloon 10, a weather observation device 20 having a weather sensor 22 and the like, and a rope 30. The flying device 1 also includes a gas exhaust unit. The gas exhaust unit includes a gas exhaust pipe 40 and a gas on-off valve 42 and the like.

[0022] The balloon 10 generates buoyancy for flying the flying device 1. Gas G that generates buoyancy for the flying device 1 is contained inside the balloon 10. The balloon 10 is formed, for example, from an elastic material, and the size of the balloon 10 can be changed according to the amount of gas G contained therein. Also, a balloon of an appropriate size can be selected according to the type and amount of gas G contained, the flying altitude, and the like. The material of the balloon 10 is not limited as long as it is elastic, and it can be formed, for example, from rubber (natural rubber or synthetic rubber).

[0023] The gas G is not particularly limited as long as it generates buoyancy in the flight device 1, and for example, helium gas or hydrogen gas can be used. The amount of gas G to be stored can be appropriately determined according to the flight altitude, etc. The gas G may be filled from the mouth of the balloon, and the gas G may be filled using the gas exhaust pipe 40.

[0024] In this embodiment, a plug 14 is inserted into the mouth tube 10a, which is the mouth of the balloon 10. The mouth tube 10a is a tubular part at the bottom of the balloon 10, and is a part that does not expand even when filled with gas G. If a gas on-off valve 42, which will be described later, is closed, the mouth of the balloon 10 can be closed and sealed by the plug 14 inserted into the mouth tube 10a. The mouth tube 10a and the plug 14 may be fixed with a clamp or string so that the plug 14 does not come off. A gas exhaust pipe 40 is inserted into the plug 14, and the gas G is exhausted to the outside only when the gas on-off valve 42 is open.

[0025] The rope 30 connects the balloon 10 and the meteorological observation instrument 20 to support the meteorological observation instrument 20. Any suitable type of rope used to connect a balloon to an onboard device such as a radiosonde can be used as the rope 30. The rope 30 only needs to be fixed to the nozzle 10a (or plug 14) so ​​that it does not come off the balloon 10.

[0026] The gas exhaust section will be described. The gas exhaust section in this embodiment is a gas exhaust pipe 40 and a gas on-off valve 42, and exhausts the gas G from inside the balloon 10 to the outside through a mouth part at the bottom of the balloon 10. The gas exhaust pipe 40 is a pipe for exhausting the gas G inside the balloon 10 to the outside of the balloon 10. The gas exhaust pipe 40 has an intake port 40a inside the balloon 10 through which the gas is sucked in when the gas is exhausted, and an exhaust port 40b for exhausting the gas to the outside on the outside side of the balloon 10. More specifically, the exhaust port 40b is on the outside (atmosphere side) of the plug 14 attached to the mouth pipe 10a of the balloon 10. A gas on-off valve 42 is attached to the exhaust port 40b, and when the valve is closed, the balloon is kept sealed.

[0027] The suction port 40a is located above the lowest position (lowest part) in the internal space of the balloon 10 when the balloon 10 is filled with gas G and floating. Specifically, it is located above the position of the mouth (mouth tube 10a) in the balloon 10. In the present embodiment, the lowest part in the interior of the balloon 10 is the upper end (upper surface) of the plug 14 placed in the mouth, so the suction port 40a of the gas exhaust tube 40, which is the gas exhaust part, may be located above the position of the upper end of the plug 14. In other words, in the present embodiment, the upper end of the plug 14 is the upper end position of the mouth tube 10a, so the suction port 40a may be located above the (upper end of) the mouth tube 10a. Note that, if the position of the upper end of the plug 14 is located below the upper end of the mouth tube 10a, the suction port 40a may be located above the upper end of the plug 14.

[0028] The reason for the placement of the suction port 40a will be explained. In the case of a balloon made of rubber or the like, in order to prevent the inner surfaces of the balloon 10 from sticking together and becoming stuck together, powder of an anti-adhesive agent (anti-sticking agent) is attached to the inner surface of the balloon 10. Powders such as talc, starch, and mica are used as the anti-adhesive agent. Some of the powder may fall from the inner surface of the balloon 10 and fall downward inside the balloon 10, and may accumulate at the bottom of the balloon during flight. Therefore, for example, if the configuration of this embodiment is not provided and a suction port for discharging gas is located at the upper end of the plug 14, the suction port may be blocked by the powder accumulated on the plug 14, and the gas G may not be properly discharged from the balloon 10. If the gas G cannot be discharged, it is difficult for the flying device 1 to control the altitude.

[0029] Furthermore, when a gas exhaust section is formed at the mouth at the bottom of the balloon and the gas on-off valve is disposed below the balloon, as in the balloon 10 of this embodiment, powder that falls from the inner surface of the balloon is likely to flow into the gas on-off valve. If powder adheres to the gas on-off valve, the airtightness of the gas on-off valve is impaired, making it difficult to properly exhaust the gas G.

[0030] In contrast, in this embodiment, the suction port 40a of the gas exhaust pipe 40 is located above the lowest part inside the balloon 10 where the powder accumulates. With this configuration, the suction port 40a is not blocked or is unlikely to be blocked even if powder accumulates around the mouth, which is the lowest part inside the balloon. In addition, since the suction port 40a is located above the lowest part, it is possible to effectively prevent the powder that has fallen and accumulated from entering the gas opening / closing valve 42, and the airtightness of the valve can be maintained. Therefore, the gas G can be stably discharged during flight, and the flight altitude can be appropriately controlled continuously during flight.

[0031] The position of the suction port 40a may be appropriately set based on the height of the powder that may accumulate at the mouth. The above effect can be obtained as long as the suction port 40a is at least above the lowest part where the powder accumulates. In other words, the suction port 40a should be located at the top (inside the balloon 10) so that it is not blocked by the powder when the powder accumulates around the mouth. In addition, it is preferable to place the suction port 40a at a position higher than the maximum height of the powder that is predicted when the powder in the balloon 10 falls and accumulates at the mouth, since this can more reliably prevent the powder from blocking the suction port. The height of the powder that may accumulate can be determined from the structure and size of the mouth of the balloon 10 and its surroundings, the amount of powder used as an adhesion inhibitor, and the like.

[0032] The method of positioning the suction port 40a of the gas exhaust part above the lowest part (mouth part) in the balloon is not limited to the method of arranging the gas exhaust pipe 40 as shown in FIG. 1, and can be appropriately changed depending on the configuration of the mouth part and the gas exhaust part. For example, if the gas exhaust pipe 40 is not arranged and a gas exhaust hole as a gas exhaust part is formed in the plug 14 to discharge the gas G, the upper end part of the gas exhaust hole becomes the suction port. In this case, if the position of the upper end of the plug 14 is arranged above the mouth pipe 10a, the effect of preventing blocking by the accumulated powder can be obtained. In this case, the gas opening and closing valve 42 may be arranged at a position such as the outlet side of the gas exhaust hole with respect to the plug 14.

[0033] As another configuration of the port, the gas exhaust pipe 40 may be inserted directly into the port tube 10a without using the plug 14, and then the port tube 10a and the gas exhaust pipe 40 may be fixed with a band or the like to form a sealed state. In this case, too, by locating the suction port 40a above the port tube 10a, it is possible to prevent the suction port 40a from being blocked by powder accumulated at the bottom.

[0034] The gas on-off valve 42 is a valve that controls the discharge of the gas G, and opens (open state) when the gas G is discharged from the gas discharge pipe 40, and closes (closed state) when the gas G is not discharged. A solenoid valve that opens and closes under the control of the controller 21 can be used as the gas on-off valve 42. The gas on-off valve 42 is attached to the discharge port 40b of the gas discharge pipe 40. The position at which the gas on-off valve 42 is disposed is not particularly limited as long as it can control the discharge of the gas G, and may be disposed, for example, midway through the gas discharge pipe 40.

[0035] When the gas on-off valve 42 is open, if the pressure of the gas G inside the balloon 10 is higher than the external pressure (atmospheric pressure), the gas G is discharged outside the balloon 10. When the gas G is discharged, the amount of gas inside the balloon 10 decreases, and the buoyancy decreases. If the balloon 10 is rising, the decrease in buoyancy reduces the rising speed. As a result, the balloon will rise more slowly than before the discharge, will hover at a constant altitude, or will change to a descending state. Furthermore, if the gas G is discharged while the balloon is hovering at a constant altitude, it will enter a descending state. If the gas G is discharged while the balloon is descending, the descent speed will increase further. On the other hand, when the gas on-off valve 42 is closed, the gas G can be kept inside the balloon 10.

[0036] The meteorological observation instrument 20 is an on-board device mounted on the flying device 1 of this embodiment, and is an object to be flown in the atmosphere. The meteorological observation instrument 20 performs meteorological observation processing such as temperature and transmission processing of measurement data. In this embodiment, the meteorological observation instrument 20 also performs control processing of the flight altitude of the flying device 1. Specifically, the meteorological observation instrument 20 has a controller 21, a weather sensor 22, a position information measuring instrument 23, and a transmitter 24.

[0037] The controller 21 controls the gas discharge unit to control the flight altitude of the flight device 1 of this embodiment. Specifically, the controller 21 controls the opening and closing of the gas on-off valve 42 to perform the gas G discharge process. The controller 21 can control the opening and closing of the gas on-off valve 42 to perform the gas discharge process based on altitude information obtained from the position information measuring device 23 or the like in order to fly at a predetermined flight altitude according to an altitude control program previously stored in a memory or the like. The controller 21 transmits a signal to the gas on-off valve 42 via the signal line 42a to control it. The controller 21 may obtain a control signal from an external device such as an observation station via wireless communication, and open and close the gas on-off valve 42 based on the signal, thereby controlling the flight altitude from the outside.

[0038] The controller 21 further controls the weather sensor 22 and the position information measuring device 23 to perform meteorological observation processing during flight. The controller 21 also controls the transmitter 24 to perform transmission processing to transmit measurement data from the weather sensor 22 and position information measured by the position information measuring device 23 to a predetermined destination such as an observation station.

[0039] The controller 21 is a control device capable of executing the above-mentioned processes. The controller 21 is composed of a processing circuit such as a CPU, a memory, and the like. The controller 21 executes programs stored in the memory to perform advanced control processes (gas discharge processes), meteorological observation processes, measurement data transmission processes, and the like. The controller 21 may include an ASIC (application specific integrated circuit), and some or all of the functions realized by the CPU executing the programs stored in the memory may be realized by the ASIC. The memory of the controller 21 may store measurement data measured by the meteorological sensor 22, etc.

[0040] The weather sensor 22 is a sensor that measures meteorological elements such as temperature, humidity, and air pressure. The weather sensor 22 may be configured with necessary sensors and measuring devices depending on the purpose of observation and the meteorological elements to be measured. The measurement data measured by the weather sensor 22 is stored in memory by the controller 21 and transmitted by the transmitter 24.

[0041] The position information measuring device 23 acquires the position information of the flight device 1. The position information only needs to include at least altitude information during flight in order to control the altitude of the flight device 1, but in the present embodiment in which the weather observation device 20 is mounted, it is sufficient that the position information includes three-dimensional position information including position information other than altitude (e.g., longitude and latitude). The position information measuring device 23 is, for example, a GPS (Global Positioning System) sensor (GPS module). The controller 21 executes altitude control processing based on the altitude information measured by the position information measuring device 23. In addition, the controller 21 can transmit the measurement data of the weather sensor 22 to the observation station in association with the position information of the position information measuring device 23.

[0042] The measurement of the flight altitude of the flight device 1 is not limited to the measurement method using a GPS sensor, and other known measurement methods may be used. For example, a barometer may be provided as the weather sensor 22, and the controller 21 may obtain the altitude from the data from the barometer. In addition, if position information other than altitude information is not required, a device capable of acquiring and measuring only flight altitude information may be used as the position information measurement device.

[0043] The transmitter 24 transmits the measurement data from the weather sensor 22 and the position information measuring device 23 to a receiver such as an observation station. The transmitter 24 can transmit the measurement data by a known wireless communication method. In addition, when the flying device 1 receives a signal from the outside, the transmitter 24 may be a transceiver.

[0044] When the flying device 1 is used for a purpose other than meteorological observation, an appropriate device corresponding to that purpose may be mounted instead of the meteorological observation device 20. For example, a mobile phone, a photographing device that photographs an object from the sky and generates an image (visible image or infrared image), a radar that irradiates radio waves from the sky and observes the radio waves reflected by an object, a repeater that receives a signal transmitted from a transmitting station on the ground and transmits it to a receiving station on the ground, etc. may be mounted.

[0045] In the present embodiment, the controller 21 controls all of the meteorological observation process, the data transmission process, and the altitude control process by controlling the gas on-off valve 42, but this is not limited to the above. A control unit that performs meteorological observation process and a control unit that performs flight altitude control process may be provided as separate control devices (controllers).

[0046] The above is the configuration of the flight device 1 of this embodiment. Next, the flow of the control process of the flight altitude by the flight device 1 will be described.

[0047] A flowchart showing the flow of the flight altitude control process is shown in Fig. 2. The process shown in Fig. 2 is executed by the controller 21 at a predetermined cycle. First, in step 101, the controller 21 measures the current flight altitude of the flight device 1 using the position information measuring device 23.

[0048] In step 102, the controller 21 drives the gas on-off valve 42 to discharge the gas G as necessary to control the flight altitude based on the flight altitude measured in the process of step 101. For example, when the ascent speed determined based on the altitude information is too fast, the controller 21 can open the gas on-off valve 42 to discharge the gas G and reduce (adjust) the ascent speed. Also, when a preset flight altitude threshold (such as an upper limit value) is exceeded, the controller 21 drives the gas on-off valve 42 to discharge gas and can lower the altitude to below the threshold. Also, when the target altitude is approaching, the controller 21 drives the gas on-off valve 42 to appropriately discharge gas to adjust the ascent speed and control the flight device 1 to fly at the target altitude. Also, for example, the controller 21 can drive the gas on-off valve 42 to discharge gas and adjust the descent speed so that the flight device 1 descends to a predetermined target point.

[0049] The opening and closing control of the gas on-off valve 42 (timing of opening and closing, time for discharging gas in the open state, etc.) may be appropriately performed according to the details of these altitude controls. Moreover, the details of these altitude controls are stored in advance in the memory of the controller 21 as an altitude control program, and can be performed by the controller 21 executing the program during flight. The above is an example of the flow of the control process for the flight altitude of the flying device 1 of this embodiment.

[0050] According to the flying device 1 of the present embodiment described above, when a gas exhaust unit for exhausting the gas G of the balloon to the outside is provided to adjust the altitude, the suction port 40a for the gas G in the balloon 10 is located above the mouth of the balloon 10, so that even if powder on the surface of the balloon 10 falls and accumulates at the mouth, the suction port 40a can be prevented from being blocked. In addition, the powder can be prevented from flowing into the gas opening and closing valve 42. Therefore, the flying device 1 can stably exhaust gas during flight and can appropriately control the flight altitude.

[0051] In this embodiment, the gas exhaust pipe 40 of the flight device is described as being provided with a gas on-off valve 42 whose opening and closing is controlled by the controller 21, but this is not limited thereto. For example, instead of the gas on-off valve, a check valve that allows the gas G to be discharged when the pressure inside the balloon 10 rises may be provided. In this case as well, the position of the suction port 40a of the gas exhaust pipe 40 is higher than the mouth of the balloon 10, so that the suction port 40a is not blocked by powder and the inflow of powder into the valve can be prevented, and the gas G can be stably discharged during flight.

[0052] A filter for preventing the inflow of powder may be disposed at the suction port 40a of the gas exhaust pipe 40. By providing a filter at the suction port 40a, the inflow of powder from the suction port 40a can be further prevented, and the airtightness of the gas opening / closing valve 42 can be more reliably prevented from being impaired. Thus, the gas G can be discharged more stably. The filter is not particularly limited as long as it is breathable and can reduce the passage of powder, and for example, a fibrous filter such as a nonwoven fabric filter or a porous filter made of foamed resin can be used. In addition, the filter may be disposed so as to cover the suction port 40a, or a cylindrical filter, for example, that matches the cross-sectional shape of the gas exhaust pipe 40, may be inserted into the gas exhaust pipe 40a.

[0053] Second embodiment The flying device 100 of the second embodiment will be described. Fig. 3 is a schematic diagram showing the configuration of the flying device 100 of this embodiment. Description of the same configuration as the flying device 1 of the first embodiment will be omitted.

[0054] In addition to gas G that generates buoyancy, the flying device 100 contains liquid L in the balloon 10 for adjusting the weight of the flying device 100 (balloon 10). The flying device 100 has a liquid discharge unit that discharges the liquid L. The liquid discharge unit discharges the liquid L from inside the balloon 10 to the outside through a mouth at the bottom of the balloon 10. Discharging the liquid L reduces the weight of the flying device 100 (balloon 10) and increases buoyancy, making it possible to adjust the flight altitude.

[0055] In this embodiment, the liquid discharge section includes a liquid discharge pipe 43, a connecting pipe 44, a liquid pump 45, etc. One end of the connecting pipe 44 arranged outside the plug 14 is connected to the lower end of the liquid discharge pipe 43. The other end of the connecting pipe 44 is connected to the liquid pump 45 arranged in the meteorological observation instrument 20 or the like. Note that the liquid discharge pipe 43 and the connecting pipe 44 may be configured as an integrated unit.

[0056] As in the discharge of gas G in the first embodiment, the controller 21 controls the liquid pump 45 to discharge the liquid L based on altitude information acquired from the position information measuring device 23 in accordance with the altitude control program stored in the memory. Discharge of the liquid L makes the balloon 10 lighter, and it is possible to increase the altitude and the ascent speed of the flight device 100. Also, the flight device 100 can adjust the altitude by discharging the gas G using the gas discharge unit (gas discharge pipe 40, gas on-off valve 42, etc.) described in the first embodiment.

[0057] The liquid discharge pipe 43 is a pipe that discharges the liquid L filled in the balloon 10 to the outside of the balloon 10 (into the atmosphere). The liquid L is sucked in and discharged from the liquid suction port 43a at the upper end of the liquid discharge pipe 43. The position of the liquid suction port 43a is located below the liquid level (initial position) after the balloon 10 is filled with the liquid L so that the liquid L can be discharged.

[0058] In this embodiment, the liquid suction port 43a of the liquid discharge pipe 43 is located above the lowest position (lowest part) in the internal space of the balloon 10 when the balloon 10 is floating. Specifically, it is located above the position of the mouth (mouth tube 10a) in the balloon 10. In this embodiment, the lowest part in the interior of the balloon 10 is the upper end (upper surface) of the plug 14 placed in the mouth, so the liquid suction port 43a of the liquid discharge pipe 43 may be located above the position of the upper end of the plug 14. In other words, in this embodiment, the upper end of the plug 14 is the upper end position of the mouth tube 10a, so the liquid suction port 43a may be located above the (upper end of) the mouth tube 10a. Note that, if the position of the upper end of the plug 14 is located below the upper end of the mouth tube 10a, the liquid suction port 43a may be located above the upper end of the plug 14.

[0059] In the case of the balloon 10 filled with the liquid L of this embodiment, the powder of the adhesion inhibitor on the inner surface of the balloon 10 may also fall, sink into the liquid L, and accumulate around the mouth. In contrast, by arranging the liquid suction port 43a as described above, the liquid suction port 43a is not blocked or is unlikely to be blocked even if the powder accumulates around the mouth, which is the lowest part inside the balloon, as in the first embodiment. Therefore, the liquid L can be stably discharged during flight, and the flight altitude can be appropriately controlled.

[0060] In this embodiment, the suction port 40a of the gas exhaust pipe 40 is disposed above the liquid level of the liquid L (initial position after filling with the liquid) so as to be able to exhaust the gas G. Therefore, similar to the first embodiment, the suction port 40a of the gas exhaust pipe 40 is not blocked even if powder accumulates at the mouth of the balloon 10, and the gas G can be stably exhausted.

[0061] According to the above embodiment, in the flight device 100 in which the balloon 10 is filled with liquid L and the liquid L is discharged through the liquid discharge pipe 43 to control the altitude, the liquid suction port 43a is located above the mouth of the balloon 10, so that the liquid suction port 43a can be prevented from being blocked even if the powder of the adhesion prevention agent falls and accumulates near the mouth. Therefore, the flight device 1 can stably discharge the liquid L during flight and appropriately control the flight altitude.

[0062] In this embodiment, the flight device 100 is equipped with both a liquid discharge section (liquid discharge pipe 43, connecting pipe 44, liquid pump 45, etc.) and a gas discharge section (gas discharge pipe 40, gas on-off valve 42, etc.), but it may be configured to only have a liquid discharge section without having a gas discharge section. [Explanation of symbols]

[0063] 1, 100 flight equipment 10. Balloon 10a Oral canal 20 Weather Station 30 Rope 40 Gas exhaust pipe 40a Suction port 40b outlet 42 Gas on-off valve 43 Liquid drain pipe 43a Liquid suction port 44 Connecting pipe 45 Liquid Pump

Claims

1. A balloon that contains a gas that generates buoyancy and has a powdered anti-adhesive agent attached to its inner surface to prevent the inner surface from sticking together; a gas exhaust section that exhausts the gas from inside the balloon to the outside through an opening at the bottom of the balloon, A flying device characterized in that a suction port of the gas exhaust section for sucking in the gas is located above the lowest part of the internal space of the balloon.

2. the gas exhaust section has a gas exhaust pipe inserted into the opening section and configured to exhaust the gas, 2. The flying device according to claim 1, wherein a suction port of the gas exhaust pipe arranged inside the balloon is located above the lowermost portion.

3. A plug is disposed in the mouth portion; 3. The flight device according to claim 2, wherein the gas exhaust pipe is disposed to pass through the plug, and the suction port is located above an upper end of the plug.

4. A controller for controlling the gas discharge process by the gas discharge unit is further provided. the gas exhaust unit further includes a gas on-off valve that opens and closes a gas flow path of the gas exhaust pipe, 4. The flight device according to claim 2, wherein the controller controls opening and closing of the gas on-off valve.

5. A position information measuring device is provided for acquiring flight altitude information of the flight device, 5. The flying device according to claim 4, wherein the controller controls the flight altitude by controlling the opening and closing of the gas on-off valve based on the flight altitude information.

6. A plug is disposed in the mouth portion; A gas exhaust hole serving as the gas exhaust portion is formed in the plug, 2. The flight device according to claim 1, wherein the suction port of the gas exhaust hole in the balloon is located above the lowermost part.

7. 7. The flying device according to claim 2 or 6, characterized in that a filter that prevents the passage of powder is disposed in the suction port.

8. A balloon that contains a liquid and a gas that generates buoyancy and has a powdered anti-adhesive agent attached to its inner surface to prevent the inner surface from sticking together; a liquid discharge part that discharges the liquid from inside the balloon to the outside through a mouth part at a lower part of the balloon, A flying device characterized in that a liquid suction port for sucking the liquid of the liquid discharge portion is located above the lowest part of the internal space of the balloon.

9. the liquid discharge portion has a liquid discharge pipe that is inserted into the mouth portion and discharges the liquid, 9. The flying device according to claim 8, wherein a liquid suction port of the liquid discharge pipe arranged inside the balloon is located above the lowermost part.

10. A plug is disposed in the mouth portion; 10. The flight device according to claim 9, wherein the liquid discharge pipe is disposed to pass through the plug, and the liquid suction port is located above an upper end of the plug.

11. A flying device according to claim 1 or 8; A weather sensor for performing weather observation; A weather observation device comprising:

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