JP3573796B2 - Aircraft landing guidance light and aircraft landing guidance system - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aircraft landing guidance light used for safely guiding a runway when an aircraft lands at an airport or the like, and an aircraft landing guidance system.
[0002]
[Prior art]
Conventionally, as an apparatus for guiding the aircraft to the runway when landing, as shown in FIG. 8, for example, a plurality of display lamps 102 are turned on along the runway 101 to which the aircraft is guided. Was like that.
[0003]
[Problems to be solved by the invention]
However, in the case of the conventional aircraft guidance device as described above, in a region with a lot of snowfall, the indicator lamp is buried due to snow on the runway, and the pilot of the aircraft alone uses the indicator lamp as it is. Visual recognition of the runway prevented a safe landing.
[0004]
In order to avoid this, the snow on the display lamp must be removed manually or the snow buried in the runway must be melted to remove the snow.
[0005]
In addition, since a normal runway generally extends for about 4 km, an enormous number of display lamps have to be arranged, which increases the construction cost and is troublesome to maintain.
[0006]
Further, the above-mentioned conventional display lamps are semi-permanently arranged on the runway, and changing the layout thereof involves a great deal of manpower and cost.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide an aircraft landing guide light that can be laid easily and that can safely and reliably guide an aircraft by three primary color laser beams emitted along a runway in order to solve the above problems. The purpose is to do.
[0008]
Another object of the present invention is to provide a control device that can select an optimal landing path according to the situation by using three primary color laser beams emitted along a selected runway, and can provide agile and elasticity. It is an object of the present invention to provide an aircraft landing guidance system capable of performing a general aircraft landing guidance.
[0009]
[Means for Solving the Problems]
The present invention, in order to achieve the above object,
(A) In an aircraft landing guidance light, a high-power laser device and a laser beam from the laser device are guided to pass through the threshold body laid at the end of the aircraft landing runway and the threshold body. Thereafter, each of the laser beam axis of the three primary colors laser light; and a three primary color laser beam projection device for projecting light in a horizontal direction along the runway surface.
[0010]
The high-power laser device has a laser light source, means for reflecting the laser light from the laser light source, and means for condensing the laser light from the reflection means.
[0011]
The laser light source has a iodine laser source, a wavelength conversion device for converting the wavelength of the laser beam from the iodine laser source, and a Ar laser over source.
[0012]
It said reflecting means comprises a total reflection mirror for reflecting the laser from the wavelength converting device, and a dichroic mirror for reflecting the laser from an Ar laser over source while transmitting the laser from the total reflection mirror.
[0013]
The condensing means is a Cassegrain-type parallel beam condensing mirror for large diameter.
[0014]
The three primary color laser light projecting device includes a light projecting mirror for making a beam passing through the threshold body parallel to an aircraft approach path.
[0015]
The threshold beam is used as an aircraft landing line.
[0016]
The threshold beam is a plate-like beam that has passed through a cylindrical lens.
[0017]
The threshold main body has a shutter, and the threshold main body is extended by the shutter so as to be retractable and detachable.
[0018]
The threshold beam is a circular beam.
[0019]
The threshold body is formed of a transparent closed container.
[0020]
The light projecting mirror has a dichroic mirror that reflects blue laser light, a dichroic mirror that reflects green laser light, and a total reflection mirror that reflects red laser light.
[0021]
(B) In an aircraft landing guidance system capable of selecting a plurality of landing routes, a high-power laser device, a threshold body that guides laser light from the laser device and is laid at an end of the aircraft landing runway; After passing through the threshold main body, the three primary color laser beams are projected along the runway, and the three primary color laser beams are projected along the runway. and a control unit for selecting a light projecting device and adapted to throw light in the horizontal direction of each of the laser beam axis of the three primary laser beam from the light projection apparatus selected along the runway surface by the control device Things.
[0022]
The control device selects a light emitting device based on wind direction information from the control tower.
[0023]
[Action]
According to the present invention, as described above,
(A) In an aircraft landing guidance light, a high-power laser device and a laser beam from the laser device are guided to pass through the threshold body laid at the end of the aircraft landing runway and the threshold body. Thereafter, each of the laser beam axis of the three primary colors laser light. Thus provided with three primary laser beam projection device for projecting light in a horizontal direction along the runway surface, is simple laying, along the runway The aircraft can be guided safely and reliably by the three primary color laser beams emitted by the light source.
[0024]
(B) In the aircraft landing guidance system, the high power laser device, the laser beam from the laser device is guided, and the threshold body laid at the end of the aircraft landing runway and passed through the threshold body And a control device for selecting the three primary color laser light projectors corresponding to a plurality of landing paths, the three primary color laser light projectors projecting respective laser optical axes of the three primary color laser lights along the runway. comprising the door. Thus for projecting light of each laser beam axis of the three primary laser beam from the light projecting device selected by the control device along the runway, the control device, the runway surface which is selected the three primary color laser light for projecting light in a horizontal direction along, depending on the situation, it is possible to select the optimal landing path, the landing agile and resilient aircraft It can be electrically.
[0025]
【Example】
An embodiment of the present invention will be described with reference to the drawings.
[0026]
FIG. 1 is an overall configuration diagram of an aircraft landing guide light showing an embodiment of the present invention.
[0027]
In this figure, reference numeral 1 denotes a high-power laser device. The high-power laser device 1 includes a laser light source 2, a reflection device 13 for the laser light from the laser light source 2, and a collection of the laser light from the reflection device 13. And an optical device 14.
[0028]
Its laser light source 2 includes a power supply 3, switch 4, iodine lasers: and (COIL laser Chemical Oxygen-Iodine Laser) 5, a wavelength converter 6 for converting the wavelength of laser light from the iodine laser 5, Ar ⁺ laser over 7 is provided.
[0029]
Here, the iodine laser 5 outputs, for example, an infrared ray having an output of 1 kW and a wavelength of 1.315 μm by liquid nitrogen cooling, dry ice and alcohol cooling, or water cooling. The wavelength is changed into a 655.3 nm red laser beam [1.315 μm × 1/2, 100 W] as a wave and a 438.3 nm blue laser beam [1.315 μm × 1/3, 10 W] as a third harmonic. Convert.
[0030]
Then, the laser light output from the wavelength conversion device 6 is reflected by a total reflection mirror 18 which is a laser light reflection device 13, and the reflected laser light is passed through a dichroic mirror 19 to a laser light focusing device 14. Through a large-diameter Cassegrain-type parallel beam converging mirror 20 as shown in FIG.
[0031]
Here, a large-diameter Cassegrain-type parallel beam focusing mirror 20 as the laser beam focusing device 14 will be described. As shown in FIG. 2, the large-diameter Cassegrain-type parallel beam focusing mirror 20 includes a convex mirror 20a. And the concave mirror 20b, the laser light incident through the dichroic mirror 19 reaches a convex mirror 20a having a reflectivity of 80 to 70% and a transmittance of 20 to 30%, and the laser light reflected by the convex mirror 20a is reflected. The laser beam is reflected by the concave mirror 20b having a rate of 100% and emitted together with the laser beam transmitted through the convex mirror 20a, so that a uniform and large-diameter beam can be formed.
[0032]
On the other hand, Ar ⁺ laser over 7, for example, and outputs an output 20W, green laser light having a wavelength 0.5145Myu m in a water-cooled, the green laser light is reflected by the dichroic mirror 19, Cassegrain type for the large-diameter The laser beam is guided to a threshold and three primary color laser beam projecting device 21 through a parallel beam focusing mirror 20.
[0033]
Here, the threshold main body 22 has a cylindrical lens 23 at the entrance end in order to form a plate-shaped beam, and surrounds a plate-shaped threshold beam 24 as shown in FIG. The laser light projecting device, that is, a transparent sealed container for preventing contamination of mirror surfaces such as a dichroic mirror and a total reflection mirror.
[0034]
Thus, the plate-shaped threshold beam 24 has a threshold function for visually recognizing the start of the aircraft runway.
[0035]
Therefore, as shown in FIG. 3, by laying the threshold main body 22 composed of a plate-shaped closed container, a low-height landing line can be configured, which hinders the landing of the aircraft at all. I try not to.
[0036]
In addition, the threshold body 22, that is, the outer surface of the transparent closed container is configured so that when snow is accumulated, snow can be removed by spraying water or using a heater.
[0037]
In addition, the transparent enclosure is made of soft material that does not damage the aircraft wheels in the event of a landing aircraft wheel contact.
[0038]
Further, a shutter 25 is disposed in the threshold main body 22 in front of a three-primary-color laser beam projecting device, which will be described later. The shutter 25 allows the threshold main body 22 to be extended, freely retracted, and configured to be detachable. be able to.
[0039]
Next, the three primary color laser light projecting device 26 includes a light projecting mirror for making the beam passing through the threshold main body 22 parallel to the aircraft approach path. That is, the light projecting mirror has a first dichroic mirror 27 that reflects blue laser light, a second dichroic mirror 28 that reflects green laser light, and a total reflection mirror 29 that reflects red laser light.
[0040]
Usually, the length of the runway 31 on which the aircraft lands is 4 km, and the width of the runway 31 needs to be 50 m. Therefore, the blue laser light 32 and the green laser light 33 are emitted by the three primary color laser light projecting devices 26 within the width 50 m of the runway 31. A red laser beam 34 is projected along the runway 31 over a length of 4 km, which is the length of the runway 31.
[0041]
FIG. 4 is an overall configuration diagram of an aircraft landing guide light showing another embodiment of the present invention.
[0042]
In this figure, the configuration of the high-power laser device 1 is the same as that of the above embodiment. However, in the above embodiment, the case where the threshold body 22 has the plate-shaped threshold beam 24 has been described. However, in this embodiment, the Cassegrain-type parallel beam condensing mirror for large diameter (the reflectance of the convex mirror) is used. 80-70%, transmittance 20-30%, reflectivity of concave mirror 100%) The laser beam passing through 20 does not pass through the cylindrical lens 23 (see FIG. 1), and is a threshold and three primary color laser beam projector. Lead to 41. Here, as shown in FIG. 5, the threshold body 42 constitutes a circular threshold beam 43 that is directly guided from the large-diameter Cassegrain-type parallel beam converging mirror 20, and is a circular beam. Can be.
[0043]
That is, as shown in FIG. 4, the threshold main body 42 has a circular threshold beam 43 made of a transparent sealed container, and the laser passes through the large-diameter Cassegrain-type parallel beam focusing mirror 20. A transparent sealed container is provided to directly guide light and prevent contamination of mirror surfaces of the three primary color laser light projecting devices 45, that is, the first dichroic mirror 46, the second dichroic mirror 47, and the total reflection mirror 48. Reference numeral 44 denotes a shutter.
[0044]
Therefore, by activating the high-power laser device 1, the blue laser light 52, the green laser light 53, and the red laser light 54 can be projected from the three primary color laser light projecting devices 45 along the runway 51. .
[0045]
In this case, as shown in FIG. 5, the height H of the circular threshold main body 42 is desirably 50 cm or less so as not to hinder landing of the aircraft. That is, a large-diameter beam having a diameter of about 50 cm is used.
[0046]
Further, since the transparent sealed containers forming the threshold main bodies 22 and 42 also serve as passages of the threshold beams 24 and 43, a gas or an optical fiber group for favorably generating laser light scattering. To be filled.
[0047]
It is desirable that the above-described high-power laser device 1 operates only when necessary and does not hinder the flight. Therefore, it is desirable that the high-power laser device 1 uses an instantaneous activation type that can be activated within a few minutes.
[0048]
Further, in order to minimize harm to the eyes of pilots and pedestrians on the ground, protective covers, for example, eaves 30 and 49, are arranged at the laser beam emitting ports of the three primary color laser beam projectors 26 and 45. It is desirable to do. The laser light is projected in the approach direction of the aircraft, and care is taken to prevent the laser light projected to the pilot's eyes from entering.
[0049]
As described above, since the landing guidance is performed using the three primary color laser beams, the pilot can safely and reliably land the aircraft.
[0050]
That is, in an airfield, various illumination lights and search lights are often turned on. In such a case, there is a concern that it is difficult to discriminate between the light for landing guidance and the disturbance light in the guidance using the monochromatic or two-color laser light. The landing can prevent landing mistakes and promote landing by safe and reliable guidance.
[0051]
In addition, there is an advantage that reliable landing guidance can be performed by a laser beam of three primary colors even on a runway with deep fog. In this case, visual recognition can be facilitated by simultaneously operating two opposite landing guide lights as described later. In this case, a safety measure is taken so that the laser beam projected from the side facing the pilot's eyes by the eaves 30 and 49 is not incident, and there is no problem at all.
[0052]
FIG. 6 is an overall configuration diagram of an aircraft landing guidance system showing an embodiment of the present invention.
[0053]
As shown in this figure, an aircraft landing guidance system is constructed in which the above-mentioned aircraft landing guidance lights are installed at a plurality of locations on an airfield so that an approach direction can be selected based on information from a control tower.
[0054]
In FIG. 6, 1A is a first high-power laser device, 1B is a second high-power laser device, 61 is a control tower, 62 is a control device, and other portions are the same as those shown in the above-described embodiment. The description is omitted here.
[0055]
In this embodiment, as shown in FIG. 6, the above-mentioned aircraft landing guide lights are arranged at two opposing locations. That is, the threshold and the three primary color laser light emitting devices 21 laid at the south end of the runway 31 facing north and south, the threshold and the three primary colors with the threshold body 42 laid at the north end. The laser light projecting devices 41 are arranged respectively.
[0056]
Therefore, for example, when the landing permission of the aircraft is made from the south direction to the north direction, the switch 4 of the power supply 3 of the first high-power laser device 1A is turned on by the output signal from the control device 62, The first large-power laser device 1A is activated, and the three-primary-color laser light projecting device 21 emits the three-primary-color laser light in the north direction.
[0057]
Accordingly, the pilot can enter the runway 31 while checking the drawn three primary color laser beams, that is, the blue laser beam 32, the green laser beam 33, and the red laser beam 34.
[0058]
When the landing permission of the aircraft is given from the north direction to the south direction, the switch 4 of the power supply 3 of the second high-power laser device 1B is turned on by the output signal from the control device 62, and the second Is activated, and the three-primary-color laser light projecting device 41 emits the three-primary-color laser light in the south direction.
[0059]
As described above, since the landing guidance is performed using the three primary color laser beams, the pilot can safely and reliably land the aircraft.
[0060]
FIG. 7 is an overall configuration diagram of an aircraft landing guidance system showing another embodiment of the present invention.
[0061]
In this figure, 1C is a third high-power laser device, 1D is a fourth high-power laser device, 71 is a control tower, 72 is a control device, and other parts are the same as those in the above-described embodiment. Is omitted.
[0062]
In this embodiment, the above-described threshold and three primary color laser light projectors 21 and 41 are arranged in north, south, east and west so that an appropriate approach direction of the aircraft can be selected in consideration of the wind direction. .
[0063]
In other words, if it is safer to land in the north-south direction, for example, if a strong wind is blowing from the north-south direction, if you try to approach from the east-west direction, you will receive the strong wind from the north-south direction as a crosswind As a result, the aircraft loses balance and is likely to deviate from the predetermined approach course. Therefore, in such a case, if the approach in the north-south direction is permitted by a command from the control tower 71 so that the approach in the north-south direction can be made, the control device 72 sets a value when the aircraft is on the south side. The first high-power laser device 1A is activated so as to enter from the south direction to the north direction, and the three primary color laser beams are emitted from the threshold and three primary color laser beam projecting devices 21 toward the north. Light can be emitted and guided to the runway 81.
[0064]
Similarly, when approaching from the north direction to the south direction, the second high-power laser device 1B is activated, and the threshold and the three-primary-color laser light projecting device 41 are moved toward the south from the three-primary-color laser device 1B. Light can be emitted and guided to the runway 82.
[0065]
When entering from the east to the west, the third high-power laser device 1C is activated, and the threshold and the three-primary-color laser light projecting device 21 are used to drive the three-primary-color laser beam toward the west. Light can be emitted and guided to the runway 83.
[0066]
Further, when entering from the west to the east, the fourth high-power laser device 1D is activated, and the threshold and the three-primary-color laser light projecting device 41 are used to drive the three primary-color lasers toward the east. Light can be emitted and guided to the runway 84.
[0067]
In this way, it is possible to select a safer approach direction in consideration of the wind direction and perform a reliable landing.
[0068]
In addition, it is possible to freely specify the runway to be used regardless of the wind direction, taking into account the usage efficiency of the airfield, and it is possible to select the optimal landing route according to the situation, Can guide the elastic aircraft landing.
[0069]
Furthermore, when arranging the high-power laser device, it is possible to increase the degree of utilization of the space above the ground by burying it underground or the like and not to impair the aesthetic appearance.
[0070]
In particular, as described above, the threshold and the three primary color laser light projecting devices allow the threshold main body to be extended by the shutter, to be rollable, and to be detachable, that is, to be laid freely. Unlike the indicator lamps which are permanently arranged in the airport, there is also an advantage that the layout of the runway of the airfield can be easily changed.
[0071]
Also, the arrangement and combination of the projected laser beams can be variously modified.
[0072]
Further, when there are a plurality of runways, if a runway name representing the runway, for example, characters such as N, S, W, and E is drawn on each runway, the characters are emitted. It is illuminated and displayed by the three primary color laser beams, so that the runway can be confirmed more reliably.
[0073]
It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.
[0074]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained.
[0075]
(1) According to the first to tenth aspects of the present invention, the laying is simple, and the aircraft can be guided safely and reliably by the three primary color laser beams emitted along the runway.
[0076]
(2) According to the thirteenth and fourteenth aspects, the control device can select an optimal landing route according to the situation by using the three primary color laser beams projected along the selected runway, An agile and flexible aircraft landing can be guided.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of an aircraft landing guide light showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a large-diameter Cassegrain-type parallel beam focusing mirror of an aircraft landing guide light according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating an approach state of an aircraft to an aircraft landing guide light according to the embodiment of the present invention.
FIG. 4 is an overall configuration diagram of an aircraft landing guide light showing another embodiment of the present invention.
FIG. 5 is a diagram showing an approach state of an aircraft to an aircraft landing guide light according to another embodiment of the present invention.
FIG. 6 is an overall configuration diagram of an aircraft landing guidance system showing an embodiment of the present invention.
FIG. 7 is an overall configuration diagram of an aircraft landing guidance system showing another embodiment of the present invention.
FIG. 8 is an overall configuration diagram of a conventional aircraft landing guide light.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 High power laser apparatus 1A 1st high power laser apparatus 1B 2nd high power laser apparatus 1C 3rd high power laser apparatus 1D 4th high power laser apparatus 2 Laser light source 3 Power supply 4 Switch 5 Iodine laser (COIL laser) )
6 wavelength converter 7 Ar ⁺ laser over
13 Reflecting device 14 Condensing device 18, 29, 48 Total reflection mirror 19 Dichroic mirror 20 Cassegrain type parallel beam condensing mirror 20a for large aperture Convex mirror 20b Concave mirror 21, 41 Threshold and three primary color laser beam projector 22, 42 Threshold Shode body 23 Cylindrical lens 24 Plate-shaped threshold beam 25, 44 Shutter 26, 45 Three primary color laser light projecting device 27, 46 First dichroic mirror 28, 47 Second dichroic mirror 30, 49 Eaves 31, 51, 81, 82, 83, 84 Runway 32, 52 Blue laser light 33, 53 Green laser light 34, 54 Red laser light 43 Circular threshold beam 61, 71 Control tower 62, 72 Controller

Claims (14)

(A) a high-power laser device;
(B) guiding a laser beam from the laser device, and a threshold body laid at an end of an aircraft landing runway;
(C) after passing the threshold body, each of the laser beam axis of the three primary colors laser light, aircraft landing guidance comprising the three primary colors laser light projection device for projecting light in a horizontal direction along the runway surface light. The high power laser device,
(I) a laser light source;
(Ii) means for reflecting laser light from the laser light source;
3. The aircraft landing guide light according to claim 1, further comprising: (iii) means for condensing the laser beam from the reflection means. The laser light source,
(I) an iodine laser source;
(Ii) a wavelength converter for converting the wavelength of the laser light from the iodine laser source;
(Iii) aircraft landing guidance lamp according to claim 2, further comprising a Ar laser over source. It said reflecting means, and a total reflection mirror for reflecting the laser from the wavelength conversion device, according to claim 3, further comprising a dichroic mirror for reflecting the laser from an Ar laser over source while transmitting the laser from total reflection mirror Aircraft landing guidance light. 3. The aircraft landing guide light according to claim 2, wherein the condensing means is a Cassegrain-type parallel beam condensing mirror for large diameter. 2. The aircraft landing guide light according to claim 1, wherein the three primary color laser light projecting device includes a light projecting mirror for making a beam passing through the threshold body parallel to an aircraft approach path. The aircraft landing guide light according to claim 1, wherein the threshold beam is used as an aircraft landing line. The aircraft landing guide light according to claim 1, wherein the threshold beam is a plate-like beam that has passed through a cylindrical lens. 9. The aircraft landing guide light according to claim 8, wherein the threshold main body has a shutter, and the shutter is used to extend the threshold main body so as to be retractable and detachable. The aircraft landing guide light according to claim 1, wherein the threshold beam is a circular beam. The aircraft landing guide light according to claim 1, wherein the threshold body is formed of a transparent sealed container. 7. The aircraft landing guide light according to claim 6, wherein the light projecting mirror includes a dichroic mirror that reflects blue laser light, a dichroic mirror that reflects green laser light, and a total reflection mirror that reflects red laser light. In an aircraft landing guidance system that can select multiple landing routes,
(A) a high-power laser device;
(B) guiding a laser beam from the laser device, and a threshold body laid at an end of an aircraft landing runway;
(C) after passing the threshold body, each of the laser beam axis of the three primary colors laser light, and the three primary colors laser light projection device for projecting light in a horizontal direction along the runway surface,
(D) a control device for selecting the three primary color laser beam projectors corresponding to a plurality of landing paths,
(E)該制aircraft landing guidance system, characterized by projecting light in a horizontal direction each laser beam axis of the three primary laser beam from the selected light emitting device along the runway surface by control device. 14. The aircraft landing guidance system according to claim 13, wherein the control device selects a floodlight device based on wind direction information from a control tower.

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