JPH08299516A - Free fall simulator - Google Patents

Abstract

PURPOSE: To provide a free fall simulator which is capable of reproducing the wind receiving state at the time of actual fall by changing the flow velocity of ascending air current according to the positions in the horizontal direction of a floating space and enables a swimmer to train fall under the conditions approximate to the actual conditions. CONSTITUTION: A blast passage 19 extended downward at the lower side of the floating space 10 is provided with a blast device 30 for blowing up the ascending air current to hold the swimmer in the swimming chamber 10 in a floating state. This blast device 30 is composed of plural blast fans 31, 32 which are arranged in juxtaposition within the same plane orthogonal with the blast passage 19 and are rotationally driven by respectively independent motors 30A and a controller 35 which independently controls the operation and number of revolutions of the respective motors 30A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to form an ascending air current from a lower part of a floating space to an upper part thereof by blowing air from an air blowing device, and the ascending air current keeps a swimmer in a floating state in the floating space. The present invention relates to a free fall simulated experience device.

[0002]

2. Description of the Related Art In the descent by a parachute, the descent path is controlled by the posture in a free descent state before the parachute is opened to reach near the descent target point, and then the parachute is opened to descend and land.
Conventionally, the practice of posture during the free descent was to actually descend after performing basic practice on the ground, but it is completely different from the practice on the ground and the actual free descent state. An accident sometimes happened during the descent practice.

Therefore, recently, a free descent simulation experience device which enables a simulated experience of a free descent state has been developed and used for practicing the free descent state. This is configured by guiding the air blown from the blower so that it passes from the lower part of the floating space to the upper part, and by making the wind speed approximately equal to the relative speed of the human and air during free fall, the practitioner can The buoyancy of the wind makes it possible to float in a floating space. As a result, it was possible to experience and practice the actual descent condition for a long time, and it became possible to acquire techniques that were not possible on the ground.

As such a wind tunnel device, there is, for example, one disclosed in Japanese Patent Application No. 3-116883, which is provided in the blower circulation path 90 as shown in the conceptual diagram of FIG. The air blower circulates in the air circulation path 90 by the blower 91 (air blower), and a swimming area 93 (floating space) is provided at the rising air blowing portion. In the configuration shown in the figure, a bypass air passage 94 connects the diagonally lower side of the swimming area 93 and the circulation passage 90 on the upstream side, and a small blower 95 is provided in the bypass air passage 94. The wind is allowed to flow into the swimming area 93 from diagonally below by the driving of the above, and a crosswind state can be generated.

In the circulation type wind tunnel device which circulates the air in the circulation path as described above, there is a problem that the temperature of the circulating air rises due to the heat generated by the blower device, and therefore the wind tunnel device for a free-fall simulation experience. As such, a non-circulating type which does not have such a problem is suitable. As a non-circulating wind tunnel device for a free-fall simulation experience, an outer wall structure surrounds an internal structure that forms a floating space to form an air intake passage between the two, and the entire circumference of the outer wall structure is surrounded. An air intake is provided over the air, so that the air introduced from the air intake by the air blower provided under the floating space passes through the air intake passage from below to above the floating space and is then discharged. There is one configured in.

[0006]

However, the above-mentioned conventional free-fall simulation experience device holds a swimmer in a floating state by a uniform upward airflow in a floating space, which is in the air in a completely windless state. Although it corresponds to the descent, the descent under such conditions was extremely rare and different from the actual descent situation. That is, ascending and descending airflows are generated in the atmosphere due to temperature and topography, and when descending the boundary region between such ascending and descending airflows, the distribution of the ascending wind velocity is uneven. And the body of the descendant rotates.

That is, the ascending wind received by the descendant is not simple, changes variously with the descent and the movement in the horizontal direction, and the state in which it is not constant depending on the body part may occur. Practicing for the situation could not be done with the conventional free descent simulation experience device.

The present invention has been made in view of the above problems, and can change the flow velocity of the ascending airflow depending on the horizontal position of the floating space to reproduce the wind receiving state during the actual descent, It is an object of the present invention to provide a free descent simulation experience device that can practice descent practice under conditions that are close to the actual conditions.

[0009]

A free-fall simulation experience device of the present invention that achieves the above object is provided with a blower device in a blower passage extending downward below a floating space. A free-fall simulation experience device configured to maintain a swimmer in a floating state in the floating space by an ascending air current that flows upward from below in the floating space, wherein the blower is the blower. A plurality of blower fans that are rotationally driven by independent drive systems are arranged in the same cross section that is orthogonal to the passage, and the operation and the rotation speed of each blower fan are independently operated by operating the respective drive systems. It is characterized by comprising a control means for controlling.

[0010]

The air blower of the air blower provided in the air blow passage is independently operated / inactivated or the number of rotations is made different by the control means controlling the drive system of the air blower, thereby making The flow velocity of the ascending airflow can be changed depending on the position, and the wind receiving state at the time of actual descent can be reproduced.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram corresponding to a vertical cross-sectional view of an embodiment of a free-fall simulation experience device according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA.

The illustrated free descent simulation experience device is a prism having a planar rectangular shape and a predetermined height as a whole, and its lower end is buried in the ground at a predetermined depth.

A swimming room 10 as a floating space is formed inside the upper part in the vertical direction, and is surrounded by an outer wall 11, and a ventilation port 13 is formed in the center of a floor 12 of the swimming room 10. . An exhaust duct 14 is provided in an opening above the swimming chamber 10 corresponding to the blower opening 13, and an ascending regulation net 15 is stretched below the opening of the exhaust duct 14.

An inner wall 16 having a predetermined height is erected on the lower surface of the floor 12 of the swimming room 10 with a communication space 18 between the inner wall 16 and the bottom inner surface 17, whereby the air passage 19 connected to the air outlet 13 is provided. And the outer surface of the inner wall 16 and the outer wall 11 are formed.
An intake passage 20 having a predetermined width is formed between the inner surface of the inner wall 16 and the inner surface of the inner wall 16.
7 communicate with each other via a communication space 18.

An air inlet 21 having a predetermined vertical width is formed along the circumferential direction at a position of the outer wall 11 corresponding to the upper end of the intake passage 20, and air is introduced from the air inlet 21 into the intake passage 20. Can be adopted.

The exhaust duct 14 is a vertical exhaust passage 14A.
Is extended outward from the upper end of the outer wall along the top surface, and is connected to an exhaust port 22 formed in the vicinity of the upper edge of the outer wall 11 at a predetermined vertical height along the circumferential direction.

Blower passage 19 formed by the inner wall 16
Is provided with a blower device 30 inside the lower end thereof, a rectifying honeycomb 23 is provided substantially in the center, and a fall prevention net 24 is doubly extended near the blower opening 13 on the side of the swimming room 10. It is set up.

In the blower device 30, as shown in FIG. 2, four blower fans 31, 32, 33 and 34, which are rotationally driven by motors 30A as independent drive systems, are orthogonal to the axial direction of the blower passage 19. The motors 30A of the blower fans 31, 32, 33, 34, which are arranged side by side on the same plane, are controlled to be ON / OFF by the control device 35 as control means and the rotational speed at the time of operation. It has become. That is, the blower fans 31, 32, 33, and 34 of the blower device 30 are controlled by the control device 35 to be turned on / off and variable in rotation speed independently.

In the free descent simulation experience device configured as described above, the intake passage 20 is driven by driving the blower device 30.
The air taken in from the air intake port 21 through the blower is blown up into the swimming chamber 10 from the blower port 13 into the swimming room 10 through the blowing passage, passes through the swimming chamber 10, and passes through the exhaust duct 1
It is discharged to the outside from the exhaust port 22 via 4. Swimming room 1
The ascending airflow blown up into the zero is the rectifying honeycomb 23.
The flow velocity in the swimming chamber 10 is set to about 70 m / sec, which is substantially equal to the relative velocity with the air during free fall. As a result, the swimmer located in the ascending airflow of the swimming room 10 is in a floating state in which it does not fall or rise, so that a free descent state can be simulated.

Here, the blower 30 by the controller 35
By controlling the driving of the blower fans 31, 32, 33, 34, it is possible to create a state in which the ascending airflow has strength depending on the horizontal position of the swimming space 10. That is, each blower fan 3
By rotating 1, 32, 33, 34 at the same number of revolutions, a rising airflow having a uniform flow velocity is generated in the floating space 10 in the horizontal direction.
By controlling the rotation of No. 4, the flow velocity of the ascending airflow in the swimming space 10 and the distribution state of the flow velocity region can be changed.

For example, four blower fans 31, 32, 3
By lowering the rotation speed of one of the blower fans 32 (the blower fan 32) out of 3, 34, the swimming chamber 10 corresponding to the line BB in FIG.
As shown in FIG. 3, the flow velocity profile of the ascending air flow in the region is such that the flow velocity in the region corresponding to the normally rotating blower fan 31 is strong and the flow velocity in the region corresponding to the low speed rotating blower fan 32 is weak. This is equivalent to encountering a downdraft during free descent. The intensity of the descending airflow can be appropriately set by changing the rotation speed of the blower fan 32, and in an extreme case, the blower fan 32 can be deactivated. On the contrary, a specific blower fan (31, 32, 3
It is possible to reproduce the state in which a local updraft is encountered by increasing the rotation speed of 3 or 34).

In this way, each blower fan 31, 32, 3
By appropriately setting the rotation speeds of 3, 34 independently, it is possible to change the flow velocity of the ascending air current depending on the horizontal position of the floating space to create a situation in which the intensity of the ascending air current is complicated and mixed. It is possible to reproduce a situation in which the relative updraft flow velocity encountered during actual free descent varies depending on the position. Further, by changing the setting of these rotational speeds in time series, it becomes possible to perform free descent practice even in a situation in which the airflow changes variously with the descent.

That is, according to the configuration of this embodiment, it is possible to learn a complicated and sophisticated free descent technique on the ground.

In the above embodiment, the blower unit 30 is provided in the blower passage 19 with four blower fans 31, 32, 33, 34.
However, the number of blower fans is not limited to this, and two or more can be appropriately set.

[0025]

As described above, according to the free-fall simulation experience device according to the present application, the blower fans arranged in the same cross section of the blower passage are operated and rotated independently by the control device. As a result, the velocity of the ascending airflow can be changed depending on the position in the horizontal plane in the floating space, and it is extremely practical and effective to create a state in which the relative ascending wind received by the descendant changes variously. This makes it possible to perform a typical descent practice on the ground.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram corresponding to a vertical cross-sectional view of a free-fall simulation experience device according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram showing a flow velocity profile of an ascending air flow in a BB cross section of FIG.

FIG. 4 is a conceptual diagram showing a conventional example.

[Explanation of symbols]

 10 Swimming Room (Floating Space) 19 Blower Passage 30 Blower 30A Motor (Drive System) 31, 32, 33, 34 Blower Fan 35 Control Device (Control Means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoyuki Matsumoto 3-2-16 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Toyosu General Office

Claims (1)

[Claims] 1. A blower is provided in a blower passage extending downward below the floating space, and the floating space is formed by an upward air flow from the lower side to the upper side in the floating space formed by the blower. A free-fall simulation experience device configured to keep a swimmer in a floating state, wherein the blowers are rotationally driven by independent drive systems in the same cross section orthogonal to the blow passage. And a control means for independently controlling the operation and rotation speed of each blower fan by operating the respective drive systems. Experience device.