JP2004132818A - Surface pressure detector of machine body panel for ejection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the damage to a pressure detection part mounted on a machine body side when a machine body panel is ejected. <P>SOLUTION: The detector is provided with a tube 5 to which a detection hole 3a formed on the machine body panel 3 goes through, the pressure detection part 6 connected to the tube 5 and mounted on the machine body 4, and a rubber bushing 11 fixed to the machine body panel 3 so as to close the detection hole 3a and goes through the tube 5 so as to close the tube 5. When the machine body panel 3 is ejected, the tube 5 is removed from the rubber bushing 11. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a surface pressure detecting device for detecting a pressure on a surface side of a body panel which can be ejected from a body of a body.
[0002]
[Prior art]
In the development stage of an aircraft, it is necessary to measure the surface pressure of the aircraft at various locations of the aircraft in order to grasp the aerodynamic characteristics. As a data collection method, a method of repeatedly performing a flight test using an unmanned aerial vehicle or the like and collecting pressure data is general.
[0003]
In an aircraft, a device using a pitot tube is generally used as a device for detecting pressure (for example, see Patent Literature 1). In particular, as a device for detecting pressure on the surface of a fuselage, a detection hole is formed in a fuselage panel. It is known to provide a stainless steel tube formed and inserted through a detection hole to communicate between the inside and outside of the body panel. In this surface pressure detecting device, the stainless steel tube is adhered to the inside of the detecting hole to keep the airframe panel airtight. Further, this surface pressure detecting device has a pressure detecting unit that communicates with the stainless steel tube via the resin tube. With this configuration, the pressure on the surface of the body panel is measured.
[0004]
By the way, the body of the aforementioned unmanned aerial vehicle is provided with a parachute storage. When the flight test is completed, deploy this parachute and lower the drone. In an unmanned aerial vehicle, when deploying a parachute for descent provided above the fuselage, a body panel serving as an outer plate at a position corresponding to the parachute storage is ejected.
[0005]
[Patent Document 1]
JP-A-8-268391
[Problems to be solved by the invention]
By the way, when collecting the data of the surface pressure on the body panel of the parachute hangar, in the surface pressure detection device, at the time of injection of the body panel, the resin tube does not separate from the stainless steel tube due to the effect of the atmospheric pressure difference, etc. As a result, a large load is applied to the measuring device from the body panel, and the pressure detecting unit is damaged. As a result, the pressure detector must be replaced with a new one each time a flight test is performed, and there is a problem that the development cost of the aircraft increases.
[0007]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a surface of an injection body panel that does not damage a pressure detection unit mounted on the body body side during injection of the body panel. It is to provide a pressure detecting device.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, in the invention according to claim 1, a pressure on a surface side of a body panel which can be ejected from a body of the body is detected, and a detection hole formed in the body panel, A pipe portion that penetrates the air hole and communicates with the outside air, a pressure detection portion mounted on the body body connected to the tube portion and detecting the pressure of the outside air through the tube portion, and the detection panel mounted on the body panel. A fixing member that is fixed in a state where the hole is closed, and a fixing member that is inserted in a state in which the tube portion is in close contact with the tube portion, the tube portion is configured to be pulled out of the fixing member when the body panel is ejected. Features.
[0009]
According to the first aspect of the present invention, in a state in which the body panel does not separate from the body body, the pressure on the surface of the body panel can be measured by measuring the pressure of the outside air through the pipe by the pressure detection unit. . At this time, the detection hole of the body panel is closed by the fixing member, and the airtightness of the inside and outside of the body panel is accurately maintained because the pipe and the fixing member are in close contact.
When the fuselage panel is ejected from the fuselage main body, the pipe section is pulled out from the fixing member, so that the fuselage panel and the fixing member are separated from the fuselage main body, and the pipe body is connected to the pressure detection unit side in a state where the pipe body is connected to the pressure detection unit side. Remains on the side. That is, since the pipe section is pulled out of the fixing member without any trouble, an excessive load is not transmitted from the pipe section to the pressure detecting section side.
[0010]
Therefore, the pressure detecting section is not damaged by the load from the pipe section when the body panel is ejected. That is, for example, after the body of the unmanned aerial vehicle is recovered, or after returning to the manned aircraft, for example, a new body panel and a fixing member are prepared, the body panel is attached to the body of the body, and the pipe is inserted through the fixing member. By doing so, pressure measurement using the pressure detecting unit can be performed again. Thereby, the surface pressure of the body panel can be repeatedly measured without replacing the pressure detection unit, and the development cost of the aircraft can be significantly reduced. If the tube is damaged during the injection of the body panel, it may be replaced with a new tube.
[0011]
According to a second aspect of the present invention, in the surface pressure detecting device for an injection body panel according to the first aspect, the fixing member is a rubber bush that is inserted through the pipe and adhered to the body panel. Features.
[0012]
According to the second aspect of the present invention, in addition to the function of the first aspect, by pressing the pipe portion into the rubber bush, the pipe portion can be attached to the body panel side in close contact with the rubber bush. The connection between the panel side and the tube is easy. Also, when a predetermined frictional force is generated between the tube and the rubber bush at the time of injection of the body panel, the tube is smoothly pulled out of the rubber bush.
[0013]
Therefore, when a new body panel is attached to the body after injection of the body panel, the apparatus can be reconfigured only by press-fitting the tube into the rubber bush, which is extremely convenient for practical use. Further, an excessive load is not applied to other portions at the time of injection of the body panel, and the pipe portion can be smoothly separated from the body panel side.
In addition, since the rubber bush is fixed to the body panel by bonding, the measurement location can be selected relatively freely. That is, the degree of freedom in selecting measurement points does not decrease, for example, as in the case of performing boss processing on a body panel.
[0014]
According to a third aspect of the present invention, in the surface pressure detecting device for an injection body panel according to the first or second aspect, the pipe portion is interposed between the pressure detecting section side and the body panel side. It is characterized by having a manifold part fixed to the body body side.
[0015]
According to the third aspect of the present invention, in addition to the operation of the first or second aspect, the manifold portion is fixed to the body main body side, so that when the body panel is ejected, the pulling direction applied from the body panel to the pipe portion is reduced. The load is received by the manifold section and is not transmitted to the pressure detecting section side.
Also, in the unlikely event that the fixing member and the pipe do not come off, a load is applied to the connection between the manifold in the pipe and the pipe on the body panel side, and the manifold is fixed to the body of the body from the side of the manifold. The piping part is separated, and the body panel side is separated from the body body side.
[0016]
Therefore, even a relatively small load at the time of ejection from the body panel is not transmitted to the pressure detection unit side. That is, no stress or the like is repeatedly generated from the manifold portion to the pressure detecting portion side, and the reliability and durability of the pressure detecting portion are significantly improved.
Further, even when the fixing member and the tube do not separate from each other, the load from the tube can be received by the manifold, and the pressure detection unit can be properly protected. In such a case, it is preferable that the connection between the pipe portion and the manifold portion is released by a predetermined pulling force so that deformation of the manifold portion and the like can be prevented.
[0017]
According to a fourth aspect of the present invention, in the surface pressure detecting device for an injection body panel according to the third aspect, the pipe section is provided on the body panel side and the metal pipe inserted through the fixing member; And a resin tube for connecting the tube and the manifold section.
[0018]
According to the fourth aspect of the invention, in addition to the function of the third aspect, the body panel side that is in close contact with the fixing member is formed of a relatively rigid metal tube, whereby the metal tube is caused by vibration of the body and the like. There is no significant deformation, and the airtightness between the fixing member and the metal tube is not impaired. The manifold side is made of a resin tube having relatively low rigidity and relatively light weight. As a result, the metal tube vibrates integrally with the body panel due to the vibration of the body or the like, but a relatively small relative movement between the metal tube and the manifold portion is allowed by the elastic deformation of the resin tube.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
1 and 2 show an embodiment of a surface pressure detecting device for an injection fuselage panel according to the present invention. FIG. 1A shows an entire aircraft in a state where the injection fuselage panel is attached to the fuselage body side. FIG. 1B is an overall view of an aircraft in a state where an injection fuselage panel is ejected from the fuselage body side, and FIG. 2 is a schematic diagram of a surface pressure detecting device of the injection fuselage panel.
[0020]
1A and 1B show an aircraft 2 on which a surface pressure detecting device 1 is mounted. As shown in FIG. 1A, the aircraft 2 is an unmanned aerial vehicle, and when descending, deploys a parachute as shown in FIG. 1B. The body panel 3 forming an outer plate at a position corresponding to the parachute hangar is ejected from the body body 4 when the parachute is deployed. The surface pressure detecting device 1 of the present embodiment detects the surface pressure of the body panel 3.
[0021]
As shown in FIG. 2, the surface pressure detecting device 1 includes a detection hole 3 a formed in the body panel 3, a pipe portion 5 that is inserted through the detection hole 3 a and communicates with the outside air, And a pressure detector 6 connected to and mounted on the machine body 4. The pressure detector 6 has the same configuration as that of a conventionally known pressure detector, and will not be described in detail here.
[0022]
Further, in the present embodiment, the tube portion 5 is a metal tube 7 fixed to the body panel 3 side, a manifold portion 8 fixed to the body body 4 side, and a second tube connecting the metal tube 7 and the manifold portion 8. It has one resin pipe 9 and a second resin pipe 10 connecting the manifold section 8 and the pressure detecting section 6. The metal tube 7 is made of, for example, stainless steel.
[0023]
The detection hole 3a is formed to have a larger diameter than the metal tube 7, and the detection hole 3a and the metal tube 7 are separated from each other. A rubber bush 11 that covers the detection hole 3a is provided on the back surface of the body panel 3, and the metal tube 7 is inserted through the hole 11a of the rubber bush 11. Thus, airtightness around the detection hole 3a of the body panel 3 is ensured.
[0024]
The first resin pipe 9 is made of, for example, a fluororesin, and one end side is connected to the metal pipe 7 by an adapter or the like. The other end of the first resin tube 9 is connected to the manifold 8 by an adapter or the like. In the present embodiment, one end of the first resin tube 9 extends from the metal tube 7 side in a direction perpendicular to the body panel 3, the center side extends in a direction parallel to the body panel 3, and the other end side Are formed to extend in a direction perpendicular to the body panel 3. That is, as shown in FIG. 2, the first resin pipe 9 is formed in a crank shape.
[0025]
The manifold 8 is made of metal, and is fixed to the body 4 by, for example, bolts and nuts. The manifold section 8 is formed to extend in a predetermined direction, and in the present embodiment, extends in a direction perpendicular to the body panel 3.
[0026]
The second resin tube 10 is made of, for example, a fluororesin, and has one end connected to the manifold unit 8 and the other end connected to the pressure detection unit 6. That is, the pressure detecting unit 6 and the front side of the body panel 3 communicate with each other by the pipe part 5 including the metal pipe 7, the first resin pipe 9, the manifold part 8, and the second resin pipe 10, and Pressure measurement becomes possible.
[0027]
The rubber bush 11 as a fixing member is fixed to the body panel 3 by bonding in a state where the detection hole 3a is closed. In the present embodiment, the rubber bush 11 is manufactured by cutting and drilling a general-purpose rubber material. The metal tube 7 is press-fitted into the hole 11 a of the rubber bush 11, and the rubber bush 11 is inserted through the metal tube 7 of the tube portion 5 in close contact. That is, by pressing the metal tube 7 into the rubber bush 11, the metal tube 7 and the rubber bush 11 can be attached to the body panel 3 side in close contact, and the connection between the body panel 3 side and the metal tube 7 is easy. It is.
[0028]
According to the surface pressure detecting device 1 configured as described above, when the body panel 3 is not detached from the body main body 4, the pressure detection unit 6 measures the pressure of the outside air through the pipe part 5, so that the body panel 3 is measured. The pressure on the surface can be measured. At this time, the detection hole 3a of the body panel 3 is closed by the rubber bush 11, and since the pipe portion 5 and the rubber bush 11 are in close contact with each other, the airtightness inside and outside the body panel 3 is accurately maintained. It is.
[0029]
In the present embodiment, the side of the body panel 3 that is in close contact with the rubber bush 11 is constituted by the metal pipe 7 having a relatively high rigidity. The airtightness between 11 and the metal tube 7 is not impaired. Further, the manifold section 8 side is constituted by the first resin pipe 9 having relatively low rigidity and relatively light weight. As a result, the metal tube 7 vibrates integrally with the body panel 3 due to the vibration of the body and the like, but the first resin tube 9 is elastically deformed, so that a relatively small relative movement between the metal tube 7 and the manifold portion 8 is caused. Permissible.
[0030]
When the body panel 3 is ejected from the body main body 4, the pipe part 5 withdraws from the rubber bush 11, so that the body panel 3 and the rubber bush 11 are separated from the body main body 4, and the pipe part 5 is connected to the pressure detecting part 6. And remains on the fuselage body 4 side while being connected to the side. In the present embodiment, when a predetermined frictional force is generated between the metal tube 7 and the rubber bush 11, the metal tube 7 is smoothly removed from the rubber bush 11. Thus, an excessive load is not transmitted from the pipe section 5 to the pressure detecting section 6 side.
[0031]
At this time, since the manifold section 8 is fixed to the body body 4 side, the load in the pulling direction applied from the body panel 3 to the pipe section 5 is received by the manifold section 8 and is not transmitted to the pressure detection section 6 side. .
[0032]
Also, if the rubber bush 11 and the metal tube 7 of the tube portion 5 do not separate from each other, a load is applied to the connection portion of the tube portion 5 between the manifold portion 8 and the first resin tube 9 which is a piping portion. The first resin pipe 9 is detached from the manifold section 8 fixed to the body body 4 side, or the metal pipe 7 and the first resin pipe 9 are detached. In any case, the pipe portion on the body panel 3 side is separated from the manifold section 8 fixed on the body body 4 side, and the body panel 3 side is separated from the body body 4 side.
[0033]
As described above, according to the surface pressure detection device 1 of the present embodiment, when the body panel 3 is ejected, the load from the pipe unit 5 is not transmitted to the pressure detection unit 6 side. No damage from the load from 5. That is, after the flight experiment is completed and the body 4 is collected, a new body panel 3 and a rubber bush 11 are prepared, the body panel 3 is attached to the body 4, and the tube 5 is inserted through the rubber bush 11. Thereby, the pressure measurement using the pressure detection unit 6 can be performed again. Accordingly, the surface pressure of the body panel 3 can be measured without replacing the pressure detection unit 6, and the development cost of an aircraft or the like can be significantly reduced. If the tube 5 is damaged when the body panel 3 is ejected, it may be replaced with a new tube 5.
[0034]
Further, according to the surface pressure detection device 1 of the present embodiment, when the new body panel 3 is mounted on the body body 4 after the body panel 3 is injected, only the metal pipe 7 is pressed into the rubber bush 11, The device 1 can be reconfigured, which is extremely convenient for practical use. Further, an excessive load is not applied to other portions when the body panel 3 is ejected, and the metal pipe 7 can be smoothly separated from the body panel 3 side.
In addition, since the rubber bush 11 is fixed to the body panel 3 by bonding, a measurement location can be selected relatively freely. That is, for example, unlike the case where the boss processing is performed on the body panel 3, the degree of freedom in selecting the measurement location does not decrease.
Furthermore, since the general-purpose rubber material is cut and drilled, the rubber bush 11 can be manufactured relatively inexpensively.
[0035]
Further, according to the surface pressure detecting device 1 of the present embodiment, since the manifold portion 8 fixed to the body main body 4 is interposed between the pressure detecting portion 6 side and the body panel 3 side, from the body panel 3 side. Is not transmitted to the pressure detecting unit 6. That is, no stress or the like is repeatedly generated from the manifold section 8 to the pressure detecting section 6 side, and the reliability and durability of the pressure detecting section 6 are remarkably improved.
[0036]
Further, according to the surface pressure detecting device 1 of the present embodiment, even when the metal pipe 7 and the rubber bush 11 do not separate from each other when the body panel 3 is injected, the manifold section 8 can detect the body pressure from the body panel 3 side. The load can be received, and the pressure detection unit 6 can be properly protected. In such a case, the connection between the first resin pipe 9 and the manifold section 8 or the first resin pipe 9 and the metal pipe can be prevented by a predetermined pulling force so as to prevent deformation of the manifold section 8 and the like. It is desirable that the connection to the connection 7 be released.
[0037]
In the above embodiment, the aircraft 2 is an unmanned aerial vehicle. However, it is needless to say that the aircraft 2 may be a manned aircraft. In this case, after the flight test is completed and the aircraft returns, the device is reconfigured with a new body panel or the like.
[0038]
Further, in the above-described embodiment, the pipe part 5 is configured by the metal pipe 7, the first resin pipe 9, the manifold part 8, and the second resin pipe 10, but the pipe part 5 is formed by the body panel 3 and the pressure. Any configuration may be used as long as it communicates with the detection unit 6 and inserts the fixing member. Further, the first resin pipe 9 is formed in a crank shape, but may be formed in a straight shape.
[0039]
In the above embodiment, the rubber bush 11 is used as the fixing member. However, a resin material other than rubber, such as urethane, may be used. That is, the fixing member is not limited to the rubber bush 11 as long as the tube portion 5 is pulled out when the body panel 3 is ejected.
[0040]
Further, for example, a rubber material may be provided inside the detection hole 3a, and it goes without saying that a specific detailed structure and the like can be appropriately changed.
[0041]
【The invention's effect】
According to the first aspect of the present invention, when the body panel is ejected, the pipe is pulled out from the fixing member fixed to the body panel, so that the pressure detection unit connected to the pipe is excessively large. The load is not transmitted, and the pressure detecting section is not damaged by the load from the pipe section. Thereby, the surface pressure of the body panel can be repeatedly measured without replacing the pressure detection unit, and the development cost of the aircraft can be significantly reduced.
[0042]
According to the second aspect of the present invention, since the fixing member is a rubber bush, the tube portion can be smoothly pulled out of the rubber bush when the body panel is injected. In addition, since the rubber bush is fixed to the body panel by bonding, the measurement location can be selected relatively freely. Furthermore, when a new body panel is attached to the body after injection of the body panel, the apparatus can be reconfigured only by press-fitting the tube into the rubber bush, which is extremely convenient for practical use.
[0043]
According to the third aspect of the present invention, since the pipe section has the manifold section fixed to the body body side, the load in the pulling direction applied to the pipe section from the body panel at the time of injection of the body panel is applied to the pressure detection section side. No transmission is performed, and the reliability and durability of the pressure detection unit are significantly improved. If the fixing member and the pipe do not separate from each other, the piping on the body panel side is separated from the manifold part fixed to the body body side, and the body panel side is separated from the body body side. Therefore, the pressure detecting section can be properly protected.
[0044]
According to the invention as set forth in claim 4, the metal tube is used for the portion of the tube portion that is in close contact with the fixing member, and the manifold and the metal tube are connected by the resin tube. There is no deformation and the airtightness between the fixing member and the metal tube is not impaired, and relatively small relative movement between the metal tube and the manifold is allowed by the elastic deformation of the resin tube.
[Brief description of the drawings]
1A and 1B show an embodiment of the present invention, wherein FIG. 1A is an overall view of an aircraft with an injection fuselage panel attached to a fuselage body, and FIG. FIG. 1 is an overall view of an aircraft in a state where it is ejected from a vehicle.
FIG. 2 is a schematic view of a surface pressure detecting device of an injection body panel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Surface pressure detection apparatus 2 Aircraft 3 Airframe panel 3a Detection hole 4 Airframe main body 5 Tube section 6 Pressure detection section 7 Metal pipe 8 Manifold section 9 First resin pipe 11 Rubber bush 11a Hole section

Claims (4)

It detects the pressure on the surface side of the body panel that can be ejected from the body of the body,
A detection hole formed in the body panel,
A pipe portion that penetrates the detection hole and communicates with outside air,
A pressure detection unit connected to the pipe unit to detect a pressure of outside air through the pipe unit, and mounted on the body of the body;
A fixing member fixed to the body panel in a state where the detection hole is closed, and a fixing member that is inserted in a state in which the tube portion is in close contact with the body panel,
A surface pressure detecting device for an injection body panel, wherein the pipe section is detached from the fixing member when the body panel is injected. The surface pressure detecting device for an injection body panel according to claim 1, wherein the fixing member is a rubber bush that is inserted through the pipe portion and adhered to the body panel. The injection body according to claim 1, wherein the pipe section has a manifold section interposed between the pressure detection section side and the body panel side and fixed to the body body side. 4. Panel surface pressure detector. The pipe section includes:
A metal tube disposed on the body panel side and penetrating the fixing member,
A resin tube connecting the metal tube and the manifold portion,
The surface pressure detecting device for an injection body panel according to claim 3, comprising:

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