JP2019169325A - Aviation sign lights and dimming systems - Google Patents

Abstract

To provide an aviation sign light and a dimming system that can adjust the intensity of light emitted from the aviation sign light.SOLUTION: An aviation sign light according to an embodiment includes a light source having a light emitting element, and a light control circuit that adjusts a luminous intensity of light emitted from the light emitting element on the basis of a control value input from outside controls dimming on the basis of the adjusted luminous intensity.SELECTED DRAWING: Figure 7

Description

  Embodiments described herein relate generally to an aircraft sign light and a dimming system.

Aviation sign lights are embedded in road surfaces such as airport taxiways. The air traffic sign lamp includes an upper lamp body protruding from the road surface. The upper lamp body is provided with a light projection window. The light projection window is made of a light-transmitting material such as glass. A light source having a plurality of light emitting diodes is provided inside the upper lamp body. The light emitted from the light source is emitted to the outside of the upper lamp body through the light projection window.
Here, the light emission efficiency of the light emitting diode is improved year by year. For this reason, depending on the time of manufacture of the air marker lamp, light with an intensity greater than necessary may be emitted from the air marker lamp. Further, the light emission efficiency of the light emitting diode has a variation of about 10% to 20%. If the luminous efficiency varies, the luminous intensity of the light emitted from the air traffic light will vary.

On the other hand, if the light projection window becomes dirty or damaged, the luminous intensity of the light emitted from the aerial beacon lamp may become a specified value or less. Conventionally, light of a predetermined luminous intensity is emitted by exchanging the light projection window. However, the projection window is an expensive part. Also, replacing the floodlight window requires disassembling and reassembling the air traffic light. For this reason, there is a risk that the maintenance period will be long and the cost may increase.
Therefore, it has been desired to develop a technique capable of adjusting the luminous intensity of the light emitted from the aviation beacon lamp.

Japanese Patent Laying-Open No. 2015-65045

  The problem to be solved by the present invention is to provide an aerial beacon lamp and a dimming system capable of adjusting the luminous intensity of light emitted from the aerial beacon lamp.

  An air traffic sign lamp according to an embodiment includes: a light source having a light emitting element; and adjusting a luminous intensity of light emitted from the light emitting element based on a control value input from outside, and adjusting light based on the adjusted luminous intensity A dimming circuit for controlling;

  According to the embodiment of the present invention, it is possible to provide an aerial beacon lamp and a dimming system capable of adjusting the luminous intensity of light emitted from the aerial beacon lamp.

1 is a schematic plan view of an air traffic sign lamp according to the present embodiment. It is a schematic cross section of an aviation beacon lamp. It is a model perspective view of an upper lamp body. It is a model side view for illustrating a light emitting module. It is a model perspective view for illustrating arrangement of a light emitting element and a lens. It is a model side view for illustrating arrangement of a light emitting element and a lens. It is a block diagram for illustrating a lighting circuit. It is a schematic cross section for illustrating the section of a lens. It is a mimetic diagram for illustrating the light control system concerning this embodiment.

  Hereinafter, embodiments will be illustrated with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.

(Aviation beacon light)
FIG. 1 is a schematic plan view of an aerial beacon lamp 1 according to the present embodiment.
FIG. 2 is a schematic cross-sectional view of the aviation beacon lamp 1.
FIG. 3 is a schematic perspective view of the upper lamp body 10.
As shown in FIGS. 1 to 3, the air traffic sign lamp 1 is provided with an upper lamp body 10, a lower lamp body 20, a light source 30, a lens 40, and an installation unit 50.

  The appearance of the upper lamp body 10 has a substantially disk shape. The thickness of the central region 13 of the upper lamp body 10 is thicker than the thickness of the outer peripheral edge 14. The position of the upper surface of the central region 13 is above the position of the upper end of the outer peripheral edge 14. The upper surface of the central region 13 is a substantially flat surface. The upper surface between the central region 13 and the outer peripheral edge 14 is an inclined surface. The inclined surface is inclined in a direction approaching the road surface 100 toward the outer peripheral edge 14 side. Therefore, it is possible to mitigate the impact that occurs when an aircraft or the like rides on the aviation beacon lamp 1.

The upper lamp body 10 is provided with a recess 11. The recess 11 is open on the surface of the upper lamp body 10 on the lower lamp body 20 side. Inside the recess 11, the light emitting element 36, the lens 37, the lens 40, and the like are housed.
The upper lamp body 10 is provided with an emission port 12 that penetrates between the inner wall and the outer wall of the upper lamp body 10. At least one emission port 12 can be provided. In this case, if a plurality of exits 12 are provided at equal intervals around the central axis 10a of the upper lamp body 10, even if the aircraft operator views the aviation sign lamp 1 from a random direction, the aviation sign lamp It becomes easy to visually recognize the light emitted from 1. The number and arrangement of the outlets 12 can be changed as appropriate according to the place where the air traffic light 1 is installed. The central axis 10a of the upper lamp body 10 can be substantially overlapped with the central axis 1a of the air traffic sign lamp 1.

For example, as shown in FIGS. 1 and 2, the upper lamp body 10 can be provided with two emission ports 12. The two emission ports 12 can be provided so as to face each other with the central axis 10a interposed therebetween.
The length (width dimension) around the central axis 10a of the emission port 12 is longer than the length (height dimension) in the direction of the central axis 10a. For example, the horizontal dimension of the emission port 12 is longer than the vertical dimension.

  In the vicinity of the outer peripheral edge 14 of the upper lamp body 10, a concave portion 16 connected to the emission port 12 is provided. The recess 16 is open to the side surface and the upper surface of the upper lamp body 10. An emission port 12 is open on the side surface of the recess 16 on the central region 13 side. Therefore, a part of the lens 40 is exposed from the emission port 12. The light emitted from the lens 40 exposed from the emission port 12 is emitted to the outside through the recess 16.

  A plurality of concave portions 15 are provided in the vicinity of the outer peripheral edge 14 of the upper lamp body 10. The recess 15 is open to the side surface of the upper lamp body 10. A screw hole penetrating in the thickness direction is provided on the bottom surface of the recess 15. The screw hole is provided at a position corresponding to the female screw provided in the lower lamp body 20. The recess 15 has such a depth that a fastening member such as a bolt or a cap nut does not protrude from the upper surface of the upper lamp body 10.

  Here, if the width dimension of the emission port 12 is increased, it is easy to obtain a light distribution that is wide in the horizontal direction and narrow in the vertical direction. However, if the width dimension of the emission port 12 is increased, the width dimension of the recess 16 is increased. When the width dimension of the recess 16 is increased, an aircraft tire, a snowplow of a snowplow, or the like easily collides with the lens 40 exposed from the emission port 12. If a tire, a snow drain plate, or the like collides with the lens 40, the lens 40 may be damaged or dirty.

Therefore, a rib 17 is provided on the bottom surface of the recess 16. The rib 17 has a plate shape and has an inclined upper surface. The position and inclination angle of the upper surface of the rib 17 are substantially the same as the position and inclination angle of the upper surface between the central region 13 and the outer peripheral edge 14. If the ribs 17 are provided, it is possible to prevent the tires, the snow drainage plate, and the like from colliding with the lens 40. However, if the rib 17 is provided, the light emitted from the lens 40 is blocked. Therefore, it is preferable that the number of ribs 17 be the minimum necessary. For example, as shown in FIGS. 1 and 2, one rib 17 can be provided in the center of the recess 16 in the width direction.
The material of the upper lamp body 10 can be a metal such as an aluminum alloy, for example. However, the material of the upper lamp body 10 is not limited to that illustrated.

  The appearance of the lower lamp body 20 is substantially ring-shaped. The thickness of the inner peripheral edge of the lower lamp body 20 is thicker than the thickness of the outer peripheral edge. The upper surface between the inner peripheral edge and the outer peripheral edge is an inclined surface. The inclined surface is inclined in a direction approaching the road surface 100 toward the outer peripheral edge side. The inclination angle of the inclined surface of the lower lamp body 20 is substantially the same as the inclination angle of the inclined surface of the upper lamp body 10. The upper end of the inner peripheral edge is substantially at the same position as the upper end of the outer peripheral edge 14 of the upper lamp body 10. Further, the upper end of the outer peripheral edge 14 is substantially at the position of the road surface 100. Therefore, a substantially continuous inclined surface can be provided between the road surface 100 and the central region 13 of the upper lamp body 10.

The lower lamp body 20 is provided on the upper surface of the adjustment ring 53.
A concave portion 21 is provided in the central region of the lower lamp body 20. The recess 21 is open on the surface (upper surface) of the lower lamp body 20 on the upper lamp body 10 side. Inside the recess 21, a light source 30 (housing 31) is provided. The opening size of the recess 21 is slightly longer than the planar size of the flange 31 a of the housing 31. Therefore, by providing the light source 30 inside the recess 21, the light source 30 and the lower lamp body 20 can be aligned, and the lens 37 and the lens 40 can be aligned.
A plurality of female screws are provided on the bottom surface of the recess 21. The female screw is provided at a position corresponding to the screw hole of the upper lamp body 10.

  The lower lamp body 20 is provided with a plurality of recesses 22. A screw hole penetrating in the thickness direction is provided on the bottom surface of the recess 22. A convex portion 23 is provided on the lower surface of the lower lamp body 20. The convex portion 23 has a ring shape and is provided in the hole of the adjustment ring 53. The outer diameter dimension of the convex portion 23 is slightly shorter than the inner diameter dimension of the hole of the adjustment ring 53. Therefore, by providing the convex portion 23 in the hole of the adjustment ring 53, the lower lamp body 20 and the installation portion 50 can be aligned.

  The lower lamp body 20 is provided with a recess 24. The recess 24 is provided at a position corresponding to the recess 16 of the upper lamp body 10. The recess 24 opens to the inner periphery and the outer periphery of the lower lamp body 20. The recess 24 and the recess 16 provide a substantially continuous groove between the emission port 12 and the outer peripheral edge of the lower lamp body 20.

Ribs 25 are provided on the bottom surface of the recess 24. In plan view, the rib 25 is provided at a position corresponding to the rib 17. The rib 25 has a plate shape. The thickness of the rib 25 is substantially the same as the thickness of the rib 17. The rib 25 has an inclined upper surface. The inclined surface of the rib 25 has a position and an inclined angle that are continuous with the inclined surface of the rib 17. The upper end of the rib 25 on the outer peripheral edge side is substantially at the position of the road surface 100. Therefore, a substantially continuous inclined surface can be provided between the road surface 100 and the upper end of the rib 17 on the central region 13 side.
The material of the lower lamp body 20 can be a metal such as an aluminum alloy, for example. However, the material of the lower lamp body 20 is not limited to that illustrated.

As shown in FIG. 2, the light source 30 is provided inside the recess 21 of the lower lamp body 20. The central axis 30 a of the light source 30 can be substantially overlapped with the central axis 10 a of the upper lamp body 10.
An upper lamp body 10 is provided on the light source 30. The light source 30 and the upper lamp body 10 are fixed to a female screw provided on the bottom surface of the recess 21 by bolts. The light source 30 and the lens 40 are removable from the upper lamp body 10 and the lower lamp body 20.

The light source 30 includes a housing 31, a lid 32, and a light emitting module 33.
The housing 31 includes a flange 31a and a storage portion 31b.
The flange 31a has a plate shape. A screw hole penetrating in the thickness direction is provided in the vicinity of the outer peripheral edge of the flange 31a. The screw hole is provided at a position corresponding to the female screw provided in the lower lamp body 20. A hole 31a1 penetrating in the thickness direction is provided in the central region of the flange 31a. Inside the hole 31a1, a convex portion 34b of the base 34, a substrate 35, a light emitting element 36, and a lens 37 are provided.

  The storage part 31b is provided on the surface of the flange 31a opposite to the upper lamp body 10 side. The accommodating part 31b has the recessed part 31b1 opened to the end surface on the opposite side to the flange 31a side. A hole 31a1 is opened on the bottom surface of the recess 31b1. The internal space of the recess 31b1 and the hole 31a1 are connected. A female screw is provided around the hole 31a1 on the bottom surface of the recess 31b1.

The lid 32 has a plate shape and closes the opening of the recess 31b1. For example, the lid 32 can be screwed to the end surface of the storage portion 31b opposite to the flange 31a side. The lid 32 can be provided with a hole for passing the wiring.
The material of the housing 31 and the lid 32 can be a metal such as an aluminum alloy, for example. However, the materials of the housing 31 and the lid 32 are not limited to those illustrated.

FIG. 4 is a schematic side view for illustrating the light emitting module 33.
FIG. 5 is a schematic perspective view for illustrating the arrangement of the light emitting elements 36 and the lenses 37.
FIG. 6 is a schematic side view for illustrating the arrangement of the light emitting element 36 and the lens 37.
As shown in FIG. 4, the light emitting module 33 includes a base 34, a substrate 35, a light emitting element 36, a lens 37, and a lighting circuit 38.
The base 34 has a flange 34a and a convex portion 34b.
The flange 34 a is provided below the upper lamp body 10. The flange 34a has a plate shape. A screw hole penetrating in the thickness direction is provided in the vicinity of the outer peripheral edge of the flange 34a. The screw hole is provided at a position corresponding to the female screw provided around the hole 31a1 on the bottom surface of the recess 31b1. The light emitting module 33 is screwed inside the recess 31b1.

The convex portion 34b is provided on the surface of the flange 34a on the upper lamp body 10 side. The convex portion 34b is provided in the central region of the flange 34a. The convex portion 34 b has a side surface 34 b 1 that faces the emission port 12. The side surface 34b1 of the convex portion 34b is an inclined surface. The side surface 34b1 is inclined in a direction approaching the central axis 30a as the distance from the flange 34a increases. The side surface 34b1 can be a flat surface. As shown in FIG. 2, the side surface 34 b 1 faces the emission port 12. The convex portion 34b can be screwed to the flange 34a, or the convex portion 34b and the flange 34a can be integrally formed.
The material of the flange 34a and the convex portion 34b can be a metal such as an aluminum alloy, for example. However, the material of the flange 34a and the convex part 34b is not limited to what was illustrated.

  The board | substrate 35 exhibits plate shape and is provided in the side surface 34b1 of the convex part 34b. The substrate 35 can be screwed to the side surface 34b1 or can be bonded. The planar shape of the substrate 35 can be a square, for example. There is no particular limitation on the material of the substrate 35. The material of the substrate 35 can be, for example, ceramics such as aluminum oxide, a metal plate whose surface is covered with an insulating material, or an organic material such as glass epoxy resin. However, in consideration of heat radiation generated in the light emitting element 36, the material of the substrate 35 is preferably a material having high thermal conductivity. The material having high thermal conductivity can be, for example, ceramics, a metal plate whose surface is covered with an insulating material, or the like.

At least one light emitting element 36 can be provided for one emission port 12. The light emitting element 36 is provided inside the upper lamp body 10 and can emit light in the direction of the emission port 12. When a plurality of light emitting elements 36 are provided, the plurality of light emitting elements 36 can be provided side by side in the width direction of the emission port 12.
As shown in FIG. 5, for example, the plurality of light emitting elements 36 can be provided in a line in the width direction of the emission port 12. The plurality of light emitting elements 36 are electrically connected to a wiring pattern provided on the surface of the substrate 35. The plurality of light emitting elements 36 are connected in series. The light emitting element 36 can be, for example, a light emitting diode, an organic light emitting diode, a laser diode, or the like.
The form of the light emitting element 36 is not particularly limited. For example, the light emitting element 36 may be a surface mount type light emitting element. For example, the light emitting element 36 may be a chip-like light emitting element mounted by COB (Chip On Board). If a surface-mounted light-emitting element or a chip-shaped light-emitting element mounted by COB can be used, the mounting density can be increased, and the light-emitting module 33 can be downsized.

  Note that in the case of the chip-like light emitting element 36 mounted by COB, a wiring that electrically connects the light emitting element 36 and the wiring pattern, and a sealing portion that has translucency and covers the light emitting element 36 and the wiring. Or the like can be provided on the substrate 35. In this case, the sealing portion can include a phosphor. The phosphor is not particularly limited and can be appropriately changed so that a desired emission color can be obtained.

As shown in FIG. 6, the lens 37 is provided on the light emission side of the light emitting element 36. The lens 37 is provided with a support portion 37 a, and the support portion 37 a is connected to the substrate 35. For example, the support portion 37 a can be bonded to the substrate 35. That is, the light emitting element 36 and the lens 37 are provided on the side surface 34b1.
One lens 37 is provided for one light emitting element 36. When a plurality of light emitting elements 36 are provided side by side, a plurality of lenses 37 can be integrally provided as shown in FIG. The dimension (cross-sectional dimension) in the direction orthogonal to the central axis 37b of the lens 37 becomes longer as it becomes the light emission side. For example, the outer shape of the lens 37 can be a substantially truncated cone shape.

The lens 37 condenses the light emitted from the light emitting element 36. For example, as shown in FIG. 6, the light L1 incident on the position of the central axis 37b of the lens 37 is emitted in the direction of the central axis 37b. The light L2 incident on the side surface of the lens 37 is reflected at the interface between the side surface of the lens 37 and the outside air, and is emitted in a direction substantially parallel to the central axis 37b. That is, the lens 37 is provided between the lens 40 and the light emitting element 36 and can collect light emitted from the light emitting element 36.
The lens 37 can be formed from a translucent material such as glass or transparent resin.

FIG. 7 is a block diagram for illustrating the lighting circuit 38.
As shown in FIGS. 4 and 7, the lighting circuit 38 includes an insulating transformer 38a and a constant current output circuit 38b.
The lighting circuit 38 is provided on the opposite side of the flange 34a from the convex portion 34b side.
The insulation transformer 38a is electrically connected to a constant current power supply device 200 provided outside the aircraft sign lamp 1 via wiring, a connector, or the like. The insulating transformer 38a steps down the AC voltage supplied from the constant current power supply device 200 to a predetermined voltage. The insulating transformer 38a is fixed to the surface of the flange 34a opposite to the convex portion 34b. The insulating transformer 38a can be screwed to the flange 34a, for example. In the case where a constant voltage circuit or the like is provided in the constant current output circuit 38b, the insulating transformer 38a can be omitted.

  The input side of the constant current output circuit 38b is electrically connected to the insulation transformer 38a. The output side of the constant current output circuit 38b is electrically connected to a wiring pattern provided on the substrate 35. The constant current output circuit 38b is fixed to the flange 34a via a spacer. The constant current output circuit 38b converts an AC constant current into a DC constant current. The constant current output circuit 38b converts the AC constant current stepped down to a predetermined voltage by the insulating transformer 38a into a DC constant current. The converted DC constant current is supplied to the light emitting element 36.

Further, the lighting circuit 38 can further include a dimming circuit 38c. Moreover, the terminal 39 which electrically connects the light control circuit 38c and the external control apparatus (control part 62) can be provided. The terminal 39 can be fixed to, for example, the storage portion 31b. For example, the terminal 39 is preferably a connector that can be easily attached and detached.
The dimming circuit 38c adjusts the luminous intensity of light emitted from the light emitting element 36 based on a control value input from the outside via the terminal 39, and performs dimming control based on the adjusted luminous intensity. There is no particular limitation on the light control method. The dimming method can be, for example, PWM dimming or phase control dimming. Details of the operation of the light control circuit 38c will be described later.
As shown in FIG. 7, the dimming circuit 38c can be provided on the same substrate as the constant current output circuit 38b, or the dimming circuit 38c can be provided on a substrate different from the constant current output circuit 38b.
In addition, metal fittings for fixing wiring, connectors, and the like can be appropriately provided.

The lens 40 is sandwiched between the upper lamp body 10 and the casing 31 through packing or the like.
The lens 40 has a ring shape. The lens 40 is provided inside the upper lamp body 10, and a part thereof is exposed from the emission port 12. The dimension (cross-sectional dimension) in the direction orthogonal to the central axis of the lens 40 becomes shorter as it goes upward. For example, the outer shape of the lens 40 can be a substantially truncated cone.
FIG. 8 is a schematic cross-sectional view for illustrating a cross section of the lens 40.
As shown in FIG. 8, the outer surface 40a of the lens 40 can be a convex curved surface. The inner surface of the lens 40 has a first incident surface 40b and a second incident surface 40c.
The first incident surface 40b is provided in the upper region of the inner surface. The first incident surface 40b can be a convex curved surface. The second incident surface 40c is provided below the first incident surface 40b. The second incident surface 40c is provided near the lower end of the inner surface. The second incident surface 40c can be a concave curved surface. The lower end of the first incident surface 40b and the upper end of the second incident surface 40c are smoothly connected.
Note that the inner side surface of the lens 40 may be formed of only the first incident surface 40b. For example, the inner surface of the lens 40 can be a convex curved surface.
That is, the outer surface and inner surface of the lens 40 include convex curved surfaces.
In addition, if the 2nd entrance plane 40c is provided, the light radiate | emitted above the road surface 100 can be increased.
The lens 40 can be formed from a translucent material such as glass or transparent resin.

  If the lens 40 includes convex curved surfaces on the outer side surface and the inner side surface, the light emitted from the plurality of lenses 37 can be diffused in the direction around the central axis 1 a of the air traffic light 1. That is, the lens 40 can emit light in a range that is wide in the horizontal direction and narrow in the vertical direction. In this case, since the light emitted from the lens 40 is emitted to the outside through the emission port 12, it is easy to emit the light in a wide range in the horizontal direction and in a narrow range in the vertical direction.

Here, as described above, the light-emitting element 36 can be a surface-mounted light-emitting element or a chip-shaped light-emitting element. The light distribution of the surface-mounted light-emitting element and the chip-shaped light-emitting element is a Lambertian light distribution. By using a light emitting element with Lambert light distribution and a light projection window having a rectangular opening, if light is emitted in a range that is wide in the horizontal direction and narrow in the vertical direction, much of the light emitted from the light emitting element is obtained. The light is not emitted from the projection window. For this reason, it becomes difficult to satisfy the total luminous flux required for an air traffic sign lamp. In this case, when the number of light emitting elements is increased, the power consumption is increased and the size of the aviation sign lamp is increased.
In addition, when the light emitted from the light emitting element is condensed using a reflecting mirror, it is necessary to provide a large reflecting mirror inside the air traffic light. Therefore, there is a possibility that the internal structure of the aviation beacon lamp becomes complicated and the size of the aviation beacon lamp increases.

Therefore, in the air traffic light 1 according to the present embodiment, the lens 37 and the lens 40 cooperate to control light distribution. For example, the lens 37 condenses the light emitted from the light emitting element 36. In this case, it is preferable to emit light in a direction substantially parallel to the central axis 37b of the lens 37. The lens 40 diffuses the light emitted from the lens 37 in the direction around the central axis 1 a of the air traffic light 1. Therefore, light can be emitted in a range that is wide in the horizontal direction and narrow in the vertical direction. That is, the lens 40 and the lens 37 cooperate to make the horizontal dimension of the irradiation range longer than the vertical dimension.
Further, since the light emitted from the light emitting element 36 is collected by the lens 37, the utilization efficiency of the light emitted from the light emitting element 36 or the light extraction efficiency from the air traffic light 1 can be improved. Therefore, power saving can be achieved. Further, since the number of the light emitting elements 36 and the lenses 37 can be reduced, it is possible to reduce the size and the price.

  As described above, the light emitting module 33 includes the base 34, the substrate 35, the light emitting element 36, the lens 37, and the lighting circuit 38. That is, an element related to light emission is provided in one light emitting module 33. Further, the light emitting module 33 can be detached from the upper lamp body 10 and the lower lamp body 20. That is, the flange 34 a, the convex portion 34 b, the light emitting element 36, the lens 37, and the lighting circuit 38 can be integrally detached from the inside of the upper lamp body 10. It is considered that most of the problems related to light emission are caused by the light emitting module 33. Therefore, if the light emitting module 33 can be removed, the light emitting module 33 can be easily replaced and maintained.

In addition, in the present situation, there are cases where an air traffic sign lamp provided with a discharge lamp is used. If a light emitting element is used as the light source, power saving and longer life can be achieved as compared with the discharge lamp. Conventionally, it has been necessary to replace the entire aerial beacon lamp having a discharge lamp with an aerial beacon lamp having a light emitting element. Therefore, the construction period was prolonged and the cost was increased.
Since the light emitting module 33 according to the present embodiment is provided with all the elements relating to light emission, it is easy to replace the light source with a discharge lamp. Therefore, it becomes easy to divert the upper lamp body, the lower lamp body, and the installation part provided in the air traffic sign lamp provided with the discharge lamp as they are. As a result, the construction period can be shortened and the cost can be reduced.

As shown in FIG. 2, the installation unit 50 is embedded in a road surface 100 such as an airport runway or taxiway.
The installation unit 50 includes a base 51, a spacer 52, and an adjustment ring 53.
The spacer 52 is provided on the base 51. The adjustment ring 53 is provided on the spacer 52.

The base 51 has a cylindrical shape. One end of the base 51 is closed. The other end of the base 51 is open.
The spacer 52 has an annular shape. Both end portions of the spacer 52 are open. An end of the spacer 52 on the base 51 side is fitted into the opening of the base 51. Therefore, the spacer 52 can be provided concentrically with the base 51.

The adjustment ring 53 has an annular shape. Both ends of the adjustment ring 53 are open. A male screw is formed on the outer surface of the adjustment ring 53. On the inner surface of the spacer 52, a female screw that matches the male screw of the adjustment ring 53 is formed. Therefore, by screwing the adjustment ring 53 into the spacer 52 and rotating the adjustment ring 53, the position of the adjustment ring 53 relative to the road surface 100, and consequently the upper lamp body 10, the lower lamp body 20, the light source 30, and the lens 40. The position with respect to the road surface 100 can be adjusted. In addition, the adjustment ring 53 is provided with a female screw that penetrates between the inner surface and the outer surface. And the unintended rotation of the adjustment ring 53 is prevented from occurring by the bolt screwed into the female screw.
A female screw is provided on the upper surface of the adjusting ring 53, and the lower lamp body 20 is fixed to the upper surface of the adjusting ring 53 by a bolt screwed into the female screw.

  The material of the base 51, the spacer 52, and the adjustment ring 53 can be, for example, a metal such as an aluminum alloy. However, the materials of the base 51, the spacer 52, and the adjustment ring 53 are not limited to those illustrated.

(Dimming system)
FIG. 9 is a schematic diagram for illustrating the dimming system 60 according to the present embodiment.
As shown in FIG. 9, the dimming system 60 includes a measurement unit 61, a control unit 62, a display unit 63, and an input unit 64.
The measuring unit 61 measures the luminous intensity of the light emitted from the air traffic sign lamp 1. For example, the measurement unit 61 can convert the intensity of incident light into an electrical signal. The measurement unit 61 can be, for example, a photometer.
The control unit 62 is electrically connected to a terminal 39 provided on the aircraft sign lamp 1. The control unit 62 is detachably connected to the terminal 39.
The control unit 62 calculates a control value for the dimming circuit 38 c based on the electrical signal from the measurement unit 61. That is, the control unit 62 calculates a control value for the dimming circuit 38 c provided in the aviation beacon lamp 1 based on the measurement value obtained by the measurement unit 61. For example, when the luminous intensity of the light emitted from the aviation sign lamp 1 is less than a predetermined range or exceeds the predetermined range, the control unit 62 determines that the luminous intensity of the light emitted from the aviation sign lamp 1 is within the predetermined range. The control value of the dimming circuit 38c is changed so as to be within. For example, the control unit 62 changes the pulse width in PWM dimming based on the electrical signal from the measurement unit 61. The changed control value is input to the dimming circuit 38c via the terminal 39. The dimming circuit 38c controls the constant current output circuit 38b based on the input control value. For example, the dimming circuit 38c controls the output from the constant current output circuit 38b based on the changed pulse width. By controlling the output from the constant current output circuit 38b, the luminous intensity of the light emitted from the light emitting element 36, and hence the luminous intensity of the light emitted from the aviation beacon lamp 1, become appropriate.
The control unit 62 can be, for example, a personal computer.

The display unit 63 displays information such as measured light intensity values, calculated control values, and commands input from the input unit 64. The display unit 63 can be, for example, a flat panel display.
The input unit 64 inputs information such as a command to the control unit 62. The input unit 64 can be, for example, a keyboard or a mouse.

Here, the luminous efficiency of the light emitting element 36 is improved year by year. Therefore, depending on the manufacturing time of the air marker lamp 1, light with an intensity greater than necessary may be emitted from the air marker lamp 1. There is no problem in the standard of the aviation beacon lamp 1 even if light with an intensity greater than necessary is emitted from the aviation beacon lamp 1. However, if the luminous intensity of the emitted light is lowered to be within a predetermined range, power saving can be achieved.
Further, the light emission efficiency of the light emitting element 36 has a variation of about 10% to 20%. If the luminous efficiency varies, the luminous intensity of the light emitted from the aviation beacon lamp 1 varies. If the variation of the light intensity is too large, the quality of the aviation sign lamp 1 may become a problem.

  In addition, aircraft signs ride on the aircraft beacon lamp 1, and snowplows of snowplows collide. Therefore, the lens 40 may become dirty or damaged. If the lens 40 is soiled or damaged, the luminous intensity of the light emitted from the aerial beacon lamp 1 may become a specified value or less. In this case, if the lens 40 is replaced, light having a predetermined luminous intensity is emitted. However, the lens 40 which is an optical component is expensive. In addition, the replacement of the lens 40 requires disassembling and reassembling the aerial beacon lamp 1. For this reason, there is a risk that the maintenance period will be long and the cost may increase.

Since the air traffic light 1 according to the present embodiment is provided with the light control circuit 38c, the luminous intensity of the light emitted from the air traffic light 1 can be adjusted as necessary.
In addition, since the aviation beacon lamp 1 is provided with a terminal 39 for electrically connecting the light control circuit 38c and the external control unit 62, it is easy to input a control value to the light control circuit 38c. .
Further, in order to adjust the light intensity, it is not necessary to replace the optical parts and disassemble and reassemble the aviation beacon lamp 1. Therefore, it is possible to shorten the maintenance work period and reduce the cost.

  Since the measuring unit 61 and the control unit 62 are provided in the light control system 60 according to the present embodiment, it is easy to make the luminous intensity of the light emitted from the aviation beacon lamp 1 appropriate. For example, the control value of the dimming circuit 38 c can be calculated based on the measurement value obtained by the measurement unit 61, and the light intensity based on the control value can be measured by the measurement unit 61. If the value measured by the measurement unit 61 is appropriate, the light intensity adjustment operation can be terminated. When the value measured by the measurement unit 61 is not appropriate, the calculation of the control value and the measurement of the luminous intensity can be repeated.

  As mentioned above, although several embodiment of this invention was illustrated, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and equivalents thereof. Further, the above-described embodiments can be implemented in combination with each other.

DESCRIPTION OF SYMBOLS 1 Aviation beacon lamp, 1a Central axis, 10 Upper lamp, 12 Outlet, 20 Lower lamp, 30 Light source, 31 Housing, 33 Light emitting module, 34 Base, 34a Flange, 34b Convex part, 35 Substrate, 36 Light emitting element , 37 lens, 38 lighting circuit, 38 b constant current output circuit, 38c dimming circuit, 39 terminal, 40 lens, 50 installation unit, 60 dimming system, 61 measuring unit, 62 control unit

Claims (5)

A light source having a light emitting element;
A dimming circuit that adjusts the luminous intensity of light emitted from the light emitting element based on a control value input from the outside, and performs dimming control based on the adjusted luminous intensity;
Aviation sign lights equipped with.   The aviation beacon lamp according to claim 1, further comprising a terminal for electrically connecting the dimming circuit and an external control device. A measuring unit for measuring the luminous intensity of the light emitted from the aerial marker lamp according to claim 1;
A control unit that calculates a control value for a dimming circuit provided in the aviation beacon lamp based on a measurement value by the measurement unit;
Dimming system equipped with   The said control part is a light control system of Claim 3 electrically connected with the terminal provided in the aircraft sign light of Claim 2. The light control system according to claim 4, wherein the control unit is detachably connected to the terminal.

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