JP2019006361A - Buoyancy adjuster and drone with gas-closed vessel - Google Patents

Abstract

To provide a drone that can fly and hover in the air while loading a heavy object or weighing heavy.SOLUTION: A drone includes: a gas-closed vessel 1 in which gas with a specific gravity that is lighter than earth atmosphere is hermetically closed; and a buoyancy adjustor 5 capable of adjusting buoyancy using a substance with a specific gravity that is heavier than the earth atmosphere, as a weight, thereby acquiring buoyancy and adjusting the buoyancy. Thus, the drone readily flies or hovers in the air while avoiding a possibility of out of control.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a drone with a buoyancy regulator and a gas sealer for flying and floating in the air while carrying a heavy object or with a heavy weight of the drone itself.

  The problem to be solved is that the buoyancy obtained by the propulsion unit provided by the drone when flying and levitating while carrying a heavy object or with the heavy weight of the drone itself is not sufficient for buoyancy. It is to solve the problem when levitation is impossible.

  The present invention enables flying and floating in the air even when the buoyancy obtained by the propulsion device provided by the drone is insufficient when a heavy object is loaded or the drone itself is heavy and flying and floating in the air. Therefore, the drone is equipped with a gas seal that seals a gas whose specific gravity is lighter than the earth's atmosphere in a drone, and a buoyancy regulator that makes it possible to adjust the buoyancy as a weight using a substance whose specific gravity is heavier than the earth's atmosphere. The most important feature is that the buoyancy can be adjusted.

  Since the buoyancy regulator and the drone with the gas sealer of the present invention can obtain buoyancy not only by the buoyancy provided by the drone but also by the gas sealer itself, only the buoyancy of the propulsion device provided by the drone can fly. And, even when levitation is impossible, there is an advantage that they are possible and the buoyancy can be adjusted.

The side view of a drone with a buoyancy regulator and a gas sealer, which has a gas sealer at the top and a buoyancy regulator at the bottom and is connected to a drone in the center. (Example 1)

  The objective of obtaining buoyancy using a gas with a specific gravity lower than that of the Earth's atmosphere and adjusting the buoyancy using a substance with a specific gravity higher than that of the Earth's atmosphere was achieved with the minimum number of parts and without compromising the functions of the drone.

  FIG. 1 is a side view of an embodiment of the apparatus of the present invention, where 1 is a gas seal, 2 is a drone propulsion device, 3 is a drone motor, 4 is a drone housing and control unit, and 5 is a buoyancy adjustment. It is a vessel.

  The material and shape of the gas sealer 1 are not limited as long as they satisfy the purpose of sealing and storing gas. The material and shape of the buoyancy adjuster 5 are not limited as long as they satisfy the purpose of the weight. Arrangement of 1 gas sealer, 2 drone propulsion device, 3 drone motor, 4 drone housing and control unit and 5 buoyancy adjuster is free as long as there is no hindrance to flight and air levitation. It is. The case and the control unit of the gas sealer 1 and the drone 4 can be either fixed or loosely connected by a wire or the like. Similarly, the case and the control unit of the drone 4 and the buoyancy adjuster 5 can be either fixed or loosely connected by a wire or the like. The method of fixing or connecting is also free as long as it does not hinder flight and levitation.

  As an example, when helium gas is used as a gas having a specific gravity lighter than the Earth's atmosphere, and water with a specific gravity of 1 is used as the weight of the buoyancy regulator, a drone with a buoyancy regulator and a gas sealer is used and is 100 kg in an environment with a temperature of 15 degrees. The following calculation shows the volume of helium gas required when flying and levitating while holding a heavy object, and in that case, how much buoyancy adjustment is required by the buoyancy regulator.

  The gas seal is assumed to be a spherical balloon, and the buoyancy regulator is assumed to be a poly tank. In this case, the weight of the gas sealer and the buoyancy adjuster is calculated as follows.

Assuming that the balloon diameter is 8 m and the balloon is a perfect sphere, the surface area Sb of the balloon is
If the weight per square meter of the balloon fabric is 0.3 kg / m ^ 2, the weight Mf of the 8 m diameter balloon itself is
Assuming that the polytank is a cubic polytank with a side of 1 m (capacity 1000 liters), the surface area Sp of this polytank is
If the weight per square meter of the plastic tank is 0.5 kg / m ^ 2, the weight Mp of the cubic plastic tank itself with a side of 1 meter is
If the weight of the drone itself is assumed to be 20 kg, the weight Mn is Mn = Mf + Mp + 20 kg when the weight of a balloon with a diameter of 8 m and a cubic poly tank with a side of 1 m is added up.
Therefore, 83.288 kg is the empty weight of the drone with the buoyancy regulator and the gas sealer in the above case.

Next, the buoyancy of helium gas filled in an 8 m diameter balloon is calculated as follows. When the temperature is 0 degree and 1 atmosphere, the density of the earth atmosphere is 1.293 kg / m ^ 3, and the density of helium gas is 0.178 Kg / m ^ 3. Therefore, the density Da of the earth atmosphere and the density Dh of helium gas when the temperature is 15 degrees are
Therefore, the buoyancy Bh per m ^ 3 in helium gas at a temperature of 15 degrees is
Since the volume of the balloon is V = 4 / 3πr3, the volume Va of the balloon with a diameter of 8 m is
In other words, the buoyancy Bh 'of the 8m diameter balloon filled with helium gas is
Since the empty weight Mn of the drone with the buoyancy regulator and the gas sealer is 83.288 kg, when a balloon with an diameter of 8 m filled with the above helium gas is used as the gas sealer, a heavy object of 100 kg is mounted on the balloon. The weight of Mg is
In this case, the buoyancy of the helium gas is Bh ′ = 284.0235 kg, so that Bh ′> Mn and the buoyancy is too strong. In this case, the buoyancy adjuster and the drone with the gas sealer may rise without permission and may become uncontrollable. Therefore, the buoyancy is adjusted with the buoyancy adjuster.

If the buoyancy that needs to be adjusted is Bc
That is, by applying a weight load of 100.7355 kg or more with the buoyancy adjuster, it is possible to avoid the possibility that the buoyancy adjuster and the drone with the gas sealer will rise without permission and become uncontrollable. Here, let Mc be the required weight load. Here, it is assumed that a cubic poly tank (capacity 1000 liters) with a side of 1 m is used as the buoyancy regulator, and water having a specific gravity of 1 is used as the weight of the buoyancy regulator. Therefore, if water of specific gravity 1 with Mc = 101 liters is injected into the plastic tank, it functions as a buoyancy regulator in the above case.
The total weight Mg 'in the above case is
The weight Md that the drone needs to lift is Bh ′ = 284.0235Kg.
In other words, in the above case, the weight that needs to be lifted by the propulsion unit included in the drone itself is only 0.2645 kg.

  Since the capacity of the buoyancy regulator can be adjusted with respect to the capacity of the gas seal that is arbitrarily determined according to the weight of the heavy object, there is a risk that the buoyancy regulator and the drone with the gas seal will be out of control. While avoiding, even when a heavy object is mounted or when the weight of the drone itself is heavy, it is possible to easily realize flying and levitation by the drone.

Claims (1)

  To fly and levitate even when the buoyancy provided by the propulsion unit provided by the drone is insufficient when flying and levitating while carrying a heavy object or when the drone itself is heavy And a buoyancy adjuster for adjusting buoyancy using a substance having a heavier specific gravity than the earth atmosphere, and flying and levitating in the air. Drone with buoyancy regulator and gas seal