JPH0848300A - Parachute tester - Google Patents

Abstract

PURPOSE:To prevent the occurrence of energy loss and human error by previously setting a time taken for fixing the whole pressure in a wind tunnel after start and outputting a timer signal to a shooting means after a set time to shoot a parachute when a running button is depressed. CONSTITUTION:A running button 10 in a wind tunnel 12 is connected to a solenoid valve 7 through a timer 9. A stopper 6 operated by a spring 6 and the solenoid valve 7 is provided in the rear part of a model 13. A time taken for fixing the whole pressure in the wind tunnel 12 after start is set to the timer 9. When a running button 10 is depressed, the wind tunnel 12 is operated while the timer 9 is operated. The timer 9 sends a signal to the solenoid valve 7 after the elapse of a predetermined time to operate the solenoid valve 7. The solenoid valve 7 is operated to shoot a parachute 2. Thus, the parachute 2 is shot automatically to prevent useless operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parachute test apparatus used in a high speed intermittent wind tunnel.

[0002]

2. Description of the Related Art When an air vehicle 29 is flying at a high speed as shown in FIG. 9 and it is necessary to reduce its flight speed (in the case of collecting or reducing the impact of collision with the sea surface or the ground). Etc.), the parachute 34 is ejected from the rear portion of the flight vehicle 29 to the outside of the flight vehicle 29, and the speed of the flight vehicle 29 is reduced by utilizing the action of the air resistance of the parachute.

In order to investigate the effect of a parachute on a high-speed air vehicle at high speed, a wind tunnel test is carried out using a model in an intermittent high-speed wind tunnel.

A conventional test apparatus is shown in FIG. High speed wind tunnel 1
The model 13 is set in 2. At the rear of the model 13 there is an axial hole 8. A spring 5 is arranged at the front end of the hole 8 in a state of being compressed by a stopper 6. The parachute 2 is housed behind the stopper 6.
The stopper 6 operates via a solenoid valve 7, and the solenoid valve 7 is connected to a switch 28 outside the wind tunnel. Further, a wind tunnel total pressure monitoring device (not shown) is provided.

In the above, at the time of the test, looking at the graph (FIG. 8) of the wind tunnel total pressure monitor (recording by pen writing) after the start, when the total pressure becomes constant, the operator 11 pushes the switch 28, and the electromagnetic The stopper 6 operates via the valve 7, and the parachute 2 is ejected by the force of the spring 5.

[0006]

In the above-mentioned conventional device,
The operator pressed a switch while watching the wind tunnel total pressure monitor (pen writing record), so there was a risk that the parachute would be ejected before the wind tunnel total pressure had settled to a certain value (in such a case, It will deteriorate the accuracy of the wind tunnel test). On the contrary, there was a risk that the chute would be ejected after a sufficient time had elapsed after the total pressure in the wind tunnel had settled (in such a case, high pressure air would be used more than necessary, resulting in energy loss. Was).
Furthermore, since a human operator operates the switch,
There was a risk of human error.

[0007]

The present invention employs the following means to solve the above-mentioned problems. That is, (1) a model having a parachute set in the high-speed wind tunnel, an ejection means for the parachute provided in the model, and a timer connected to the operation button of the high-speed wind tunnel to send an output to the ejection means. And. (2) A model having a parachute set in the high-speed wind tunnel, an injection means for the parachute provided in the model, a total pressure detection sensor provided in the high-speed wind tunnel, and a total pressure detection sensor And an arithmetic means for transmitting an injection signal to the injection means when the output reaches a predetermined total pressure.

[0008]

[Action]

(1) In the above means 1, the timer is set in advance to a time at which the total pressure in the wind tunnel becomes constant (steady) after the start.

During the test, pressing the run button activates the high speed wind tunnel and sends a signal to the timer. Then, after a predetermined time, a signal is sent from the timer to the ejection means,
The ejection means operates to eject the parachute.

In this way, the parachute can be ejected after the wind tunnel has always started and the total pressure has become constant. Therefore, the test can be surely performed without wasteful driving of the wind tunnel. (2) In the above means 2, when the high speed wind tunnel is started, the total pressure is detected by the total pressure detection sensor and sent to the calculation means. The computing means sends an ejection signal to the ejection means when the input becomes constant (steady). After that, the same operation as in the above 1 is performed. The effect is almost the same.

[0011]

【Example】

(1) An embodiment of the present invention 1 described above will be described with reference to FIGS. It should be noted that the parts described in the conventional example are denoted by the same reference numerals and the description thereof is omitted, and the parts relating to the present invention will be mainly described.

In FIG. 1, a wind tunnel operating button 10 is connected to a solenoid valve 7 via a timer 9. A stopper 6 which is operated by a spring 5 and a solenoid valve 7 is provided at the rear of the model 13. These are the ejection means. The timer 9 is a time t at which the total pressure in the wind tunnel 12 becomes constant (settled) as shown in FIG.
Set to ₀ .

In the above, during the test, the driving button 10
When is pressed, the high speed wind tunnel 12 is activated and a signal is sent to the timer 9. Then, after a predetermined time t ₀ , the timer 9
Sends a signal to the solenoid valve 7, which operates the solenoid valve 7 to eject the parachute 2.

In this way, the parachute can be automatically ejected after the wind tunnel is always started and the total pressure becomes constant. Therefore, the test can be surely performed without wasteful driving of the wind tunnel.

It should be noted that the timer operating time is set based on the conventional results so that the total time of the wind tunnel is settled sufficiently (for example, about 10 seconds).

In the above, the spring, the stopper, and the solenoid valve were used as the injection means, but as shown in FIG.
Explosive powder 25 and heater 26 may be used. As a result, the storage hole 8 of the parachute 2 can be made small. (2) The invention 2 described above will be described with reference to FIGS. The description of the part described in (1) above is omitted.

In FIG. 4, the total pressure detecting sensor 1 is installed in the wind tunnel 12.
9 is provided, and its output is sent to the solenoid valve 7 via the computer 17.

In the above, when the high speed wind tunnel 12 is started, the total pressure is detected by the total pressure detection sensor 19 and sent to the computer 17. The computer 17 sends an injection signal to the solenoid valve 7 when the input becomes constant (within the allowable range ΔP). The processing flow of the computer 17 is shown in FIG. After that, the same operation as in the above 1 is performed. The effect is almost the same. Also in this case, the explosive 25 and the heater 26 may be used as the ejection means as shown in FIG.

[0019]

According to the present invention as described above,
When the total pressure in the high-speed wind tunnel has settled, the parachute will be automatically launched. Therefore, a test can be performed reliably and with good operation efficiency.

[Brief description of drawings]

FIG. 1 is a configuration system diagram of an embodiment of the present invention 1. FIG.

FIG. 2 is an explanatory view of the operation of the same embodiment.

FIG. 3 is a configuration system diagram of another example of Invention 1;

FIG. 4 is a structural system unit of an embodiment of the present invention 2;

FIG. 5 is an explanatory view of the operation of the embodiment.

FIG. 6 is a processing flowchart of the embodiment.

FIG. 7 is a configuration system diagram of a conventional example.

FIG. 8 is an operation explanatory view of the conventional example.

FIG. 9 is an explanatory diagram of the conventional example.

[Explanation of symbols]

 2 Parachute 5 Spring 6 Stopper 7 Solenoid valve 9 Timer 10 Wind tunnel operation button 11 Operator 12 Wind tunnel 13 Model 17 Computer 19 Total pressure detection sensor 25 Explosive 26 Heater 28 Switch 29 Aircraft 34 Parachute

Claims (2)

[Claims] 1. A model having a parachute set in a high-speed wind tunnel, injection means for the parachute provided in the model, and a driving button of the high-speed wind tunnel,
A parachute test device comprising a timer for sending an output to the ejection means. 2. A model having a parachute set in the high speed wind tunnel, an injection means for the parachute provided in the model, a total pressure detection sensor provided in the high speed wind tunnel, and a total pressure detection. A parachute test apparatus comprising: an arithmetic unit that sends an injection signal to the injection unit when the output of the sensor reaches a predetermined total pressure.