JP2017091714A - Airplane warning light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a long-life, lightweight and high-luminous aviation obstruction light satisfying specifications as a high-luminosity aviation obstruction light using an LED. SOLUTION: A storage body 3 for storing an LED substrate 2 for mounting an LED module 1 configured by connecting a plurality of LEDs in series and an opening 3a of the storage body are arranged and the light of the LED is directed in the vertical direction. A plurality of light sources having a condensing lens 4 for condensing light and a diffusing lens 5 which is superposed on the condensing lens and diffuses LED light in the horizontal direction, and which adjusts the light distribution characteristics in the vertical direction and the light distribution characteristics in the horizontal direction. The devices 3A, 3B, and 3C are provided, and the light source devices of the plurality of light source devices are arranged at predetermined angles with respect to the circumferential direction in the horizontal direction and are connected to each other. [Selection diagram] Fig. 1

Description

  The present invention relates to an aviation obstacle light used to indicate the presence of a building or the like that interferes with an aircraft flying in the daytime, twilight, or nighttime.

  Conventionally, aviation obstruction lights have been used to indicate the presence of high-rise structures (excluding high-rise buildings) that interfere with aircraft flying in the daytime, twilight, and nighttime. Aviation obstruction lights have light distribution specifications. Conventional high-luminance aviation obstruction lights use a xenon lamp as a light emitter, and use a reflector to obtain specified optical characteristics. However, since the xenon lamp has a lifetime, it is necessary to replace the lamp about every one year. Therefore, aviation obstacle lights using light emitting diodes (LEDs) have been proposed.

  In Cited Document 1, LEDs with different vertical light distribution spread and horizontal light distribution spread are arranged to equalize the luminous intensity in the entire circumferential direction while satisfying the light distribution specification in the vertical direction. Aircraft obstruction lights that can be described.

  Patent Documents 2 and 3 describe aviation obstacle lights that use a light source in which light distribution is adjusted by reflecting light from a light emitting element using a reflector. A plurality of light sources are arranged around and emit light in the entire circumferential direction.

  In Patent Document 4, as a method for adjusting the light distribution of an illumination device using LEDs as a light source, bare chips of a plurality of LEDs are sealed with a sealing material, and the upper surface of the sealing material has a concave shape and a convex shape. A lighting device that diffuses or collects light emitted from a light emitting element is described.

  Aviation obstruction lights are specified by the specifications of the Aviation Bureau, and the main optical characteristics of the high intensity aviation obstruction lights are shown in Table 1.

  The beam angle is defined as a value at which the effective luminous intensity for each mode is equal to 50% of the minimum allowable value of the peak value. The vertical light distribution need not be symmetric with respect to the vertical angle at which the peak luminous intensity occurs. For each mode of daytime, twilight, and nighttime, the peak value is shown as a ratio to the maximum allowable value at the same horizontal angle. For each mode, it is shown as the ratio of the peak value to the lowest allowable value at the same horizontal angle.

JP 2011-204433 A Japanese Unexamined Patent Publication No. 2013-197018 JP 2014-182961 A JP 2011-199211 A

  However, since Patent Document 1 uses a bullet-type LED having different light distribution characteristics, it is considered that the LED cannot sufficiently dissipate heat, and is not suitable for a high-luminance aviation obstacle light that requires high light intensity.

  Patent Documents 2 and 3 are difficult to manufacture because the reflecting surface of the reflector needs to be a highly accurate curved surface. Patent Document 4 can easily diffuse or condense the light of the LED, but in order to ensure the accuracy of light distribution in which the vertical direction and the horizontal direction are significantly different, the concave shape or the convex shape of the upper surface of the sealing material Is difficult to create accurately.

  An object of the present invention is to provide a aviation obstacle light that satisfies specifications as a high-luminance aviation obstacle light using LEDs, has a long life, is light, and has a high luminosity.

  In order to solve the above-mentioned problems, an aviation obstacle light according to the present invention is disposed in a housing body that houses an LED board that mounts an LED module configured by connecting a plurality of LEDs in series and an opening of the housing body. And a light condensing lens for condensing the light of the LED in the vertical direction and a diffusion lens superimposed on the condensing lens and diffusing the light of the LED in the horizontal direction. A plurality of light source devices for adjusting the light distribution characteristics of the plurality of light source devices, wherein each of the light source devices is arranged at a predetermined angle with respect to the circumferential direction of the horizontal direction and connected to each other. It is characterized by.

  According to the present invention, when the diffusion characteristic of the diffusing lens is widened, the luminous intensity is lowered. However, by arranging a plurality of light source devices on the circumference in the horizontal direction, the luminous intensity is reduced with respect to the horizontal direction of 360 degrees without reducing the luminous intensity. Light distribution characteristics can be satisfied. Therefore, the specification as a high-luminance aviation obstacle light using LEDs can be satisfied, and a long-life, lightweight, high-luminance aviation obstacle light can be provided.

It is a figure which shows the light distribution characteristic of the vertical direction of the aviation obstacle light which concerns on this invention. It is a figure which shows the light distribution characteristic of the horizontal direction of the aviation obstacle light which concerns on this invention. It is a figure which shows the structure of the aviation obstacle light which concerns on Example 1 of this invention. It is a figure which shows the structure of the aviation obstacle light which concerns on Example 2 of this invention. It is a figure which shows the structure of the aviation obstacle light which concerns on Example 3 of this invention. It is a figure which shows the structure of the aviation obstacle light which concerns on Example 4 of this invention. It is a figure which shows the structure of the aviation obstacle light which concerns on Example 5 of this invention. It is a figure which shows the structure of the aviation obstacle light which concerns on Example 6 of this invention. It is a figure which shows the structure of the aviation obstacle light which concerns on Example 7 of this invention.

  Hereinafter, an aviation obstacle light according to an embodiment of the present invention will be described in detail with reference to the drawings.

  First, the high-luminance aviation obstacle light needs to satisfy the light distribution characteristics shown in Table 1. As shown in FIG. 1, the light distribution characteristic in the vertical direction is 50% to 75% of the ratio of the effective light intensity to the minimum allowable value of the peak value at a vertical angle of -1 ° (ie, 1 ° downward) from the center of the light source. To lower. Furthermore, at a vertical angle of −10 ° from the center of the light source (that is, downward by 10 °), the effective luminous intensity is set to 3% or less of the ratio of the peak value to the minimum allowable value.

  Further, as shown in FIG. 2, the light distribution characteristic in the horizontal direction is required to have a luminous intensity of 50% or more and 75% or less of the ratio of the peak value to the minimum allowable value in the horizontal direction with a beam angle of ± 60 ° from the light source. The Further, the beam angle in the vertical direction is required that 50% of the minimum allowable peak value is 3 ° or more and 7 ° or less in the vertical direction.

  3A is a perspective view of the aviation obstacle light according to the first embodiment of the present invention, FIG. 3B is a horizontal sectional view of the aviation obstacle light, and FIG. 3C is a vertical section of the aviation obstacle light. FIG.

  In order to satisfy the above-mentioned light distribution characteristics, as shown in FIG. 3, an LED module 1 configured by connecting a plurality of LEDs in series is mounted on an LED substrate 2. The quantity of LEDs is determined by the required light intensity.

  The LED board 2 is attached to one surface of the case 3 (corresponding to the storage body of the present invention) so that the longitudinal direction of the LED module 1 is horizontal. The case 3 is formed with an opening 3a having an opening on one surface from which the light of the LED module 1 is emitted.

  Cooling fins 10 are attached to the back surface of the LED substrate 2 or the back surface of the case 3.

  The LED module 1 is mounted on the surface of the case 3 that faces the opening 3a. Although not shown, the LED module 1 is connected to wiring for supplying a drive current from the outside.

  As shown in FIG. 3C, a plate-like condensing lens 4 that condenses light from the LED module 1 in the vertical direction is attached to the opening 3 a of the case 3. As the condenser lens 4, for example, a Fresnel lens made of acrylic resin or polycarbonate is used. As shown in FIG. 3C, light is emitted in parallel by the condenser lens 4 and adjusted so as not to diffuse in the vertical direction.

  Instead of the condenser lens 4, the LED itself having the condenser lens 4 may be used.

  It suffices that the effective luminous intensity is reduced from 50% to 75% of the peak value in the direction downward by 1 ° from the center position of the LED module 1. For this reason, the separation distance between the LED module 1 and the condenser lens 4 is adjusted to the focal length of the condenser lens 4. That is, the lateral width of the case 3 is determined by the focal length of the condenser lens 4.

  Further, a diffuser lens 5 made of a plate-like sheet lens is attached at a position farther from the LED module 1 than the condenser lens 4 and overlaps the condenser lens 4. As the diffusion lens 5, for example, a Fresnel lens made of acrylic resin or polycarbonate is used. As shown in FIG. 3B, the diffusing lens 5 is adjusted so that the luminous intensity is 50% or more and 75% or less of the peak value with respect to the horizontal direction of ± 60 ° from the LED as the light source.

  The condensing lens 4 and the diffusing lens 5 may be a single compound lens.

  As described above, the condensing lens 4 that condenses the light of the LED in the vertical direction and the diffusion lens 5 that diffuses the light of the LED in the horizontal direction are used, and the condensing lens 4 is disposed on the LED module 1 side. The light distribution characteristic in the vertical direction can be easily adjusted by disposing 5 on the outside of the condensing lens 4 and setting the distance between the condensing lens 4 and the diffusing lens 5 and the LED module 1 as the focal length. Moreover, desired light distribution characteristics can be easily obtained by changing the characteristics of the diffusing lens 5 and the condenser lens 4.

  Therefore, the effective luminous intensity is reduced from 50% of the peak value at a vertical angle of -1 ° (ie, 1 ° downward) from the center of the LED as the light source, while the vertical light distribution characteristic is 100% or more at a vertical angle of 0 °. The effective luminous intensity can be reduced to 3% or less of the peak value at a vertical angle of −10 ° (that is, downward by 10 °). Further, the light distribution characteristic in the horizontal direction can be set to 50% or more and 75% or less of the peak value with respect to the direction of ± 60 ° from the LED as the light source.

  For this reason, the specification as a high-luminance aviation obstacle light using LEDs can be satisfied, and a long-life, lightweight, high-luminance aviation obstacle light can be provided.

  If the diffusing lens 5 is arranged on the LED module 1 side, the light is diffused and then condensed, so that the light is not sufficiently collected. For this reason, the condensing lens 4 is arrange | positioned at the LED module 1 side.

  Also, a plurality of light source devices each having a case 3 for housing the LED substrate 2 on which the LED module 1 is mounted, a condenser lens 4 and a diffusing lens 5 are arranged at predetermined angles in the horizontal circumferential direction, and the beam angle Can be set to 120 °.

  For example, as shown in FIG. 3D, a light source device having a case 3 for housing an LED substrate 2 on which the LED module 1 is mounted, a condenser lens 4 and a diffusing lens 5 is 45 ° in the horizontal circumferential direction. Three (predetermined angles) are arranged and connected to each other. The three light source devices 3A, 3B, 3C have a beam angle of 120 °. Note that the predetermined angle may be within a range of 30 ° to 60 °.

  As a result, a portion where the light overlaps between the three light source devices 3A, 3B, 3C is generated, and the luminous intensity is added. By arranging three or four sets of these high-luminance aviation obstacle lights in the horizontal direction, the luminous intensity does not decrease over the entire circumference in the horizontal direction.

  In FIG. 3D, three light source devices 3A, 3B, and 3C are used, but one light source device may be used as long as the horizontal light distribution characteristic of the LED module 1 is obtained.

  FIG. 4 shows a configuration of an aircraft obstacle light according to the second embodiment. The aircraft obstacle light according to the second embodiment shown in FIG. 4 is provided with an LED control circuit 10A. The LED control circuit 10A controls the light source devices 3A, 3C on the left and right sides of the three light source devices 3A, 3B, 3C so as to make the LED current smaller than the LED current of the central light source device 3B. To do.

  Thereby, it can be made to conform to the specification of horizontal 0 ° shown in Table 1 and the specification of ± 60 °.

  Instead of providing the LED control circuit 10A, each of the three light source devices 3A, 3B, 3C may control the current of its own LED.

  Further, the light source devices 3A and 3C on the left and right sides may have a light intensity smaller than that of the central light source device 3B. Thereby, it can be made to conform to the specification of horizontal 0 ° shown in Table 1 and the specification of ± 60 °.

  Further, the light source devices 3A, 3C on the left and right sides may have a smaller number of LEDs than the central light source device 3B. Thereby, it can be made to conform to the specification of horizontal 0 ° shown in Table 1 and the specification of ± 60 °.

  Further, instead of changing the absolute value of the LED current value, the LED current may be apparently changed by PWM control.

  The high-luminance aviation obstacle light is configured by arranging a total of nine light source devices in three sets of three in the circumferential direction in the horizontal direction. However, depending on the LED module 1, the light intensity may be insufficient.

  FIG. 5 shows the configuration of an aircraft obstacle light according to the third embodiment. The aviation obstacle light according to the third embodiment shown in FIG. 5 has a plurality of, for example, three, light source devices arranged in the circumferential direction. In the third embodiment shown in FIG. 5, the three-stage light source devices 3A1, 3A2, and 3A3 are shown for the light source device 3A shown in FIG.

  In addition, a three-stage light source device can be arranged for each of the light source device 3B and the light source device 3C shown in FIG.

  As described above, by arranging a plurality of stages for each of the light source devices 3A, 3B, and 3C arranged in the circumferential direction, it is possible to realize a higher-luminance aviation obstacle light.

  As shown in FIG. 5, when a plurality of light source devices are arranged, the light distribution characteristics in the vertical direction may not satisfy the specifications. In this case, the light distribution characteristic in the vertical direction is adjusted by changing the position of the LED module 1 for each stage of the light source device.

  FIG. 6 shows an example in which the LED position is slightly lowered or raised with respect to the center position in the vertical direction of the condenser lens 4 of the aircraft obstacle light according to the fourth embodiment.

  In FIG. 6B, the central position O of the condenser lens 4 in the vertical direction and the middle position O of the LED in the vertical direction are on the same line. In this case, light is emitted horizontally with respect to the vertical direction.

  On the other hand, FIG. 6A shows the LED in which the vertical position of the LED is slightly raised with respect to the vertical center position O of the condenser lens 4 and emits light downward. Further, FIG. 6C shows a state where the vertical position of the LED is slightly lowered with respect to the vertical center position O of the condenser lens 4 and emits light upward.

  FIG. 6D shows a configuration in which three-stage light source devices 3A1, 3A2, and 3A3 are arranged. The LED module 1B in the middle light source device 3A2 emits light horizontally with respect to the vertical direction.

  The LED module 1 </ b> A in the upper light source device 3 </ b> A <b> 1 slightly raises the vertical position of the LED with respect to the vertical center position of the condenser lens 4 and emits light downward with respect to the vertical direction. The LED module 1C in the lower light source device 3A3 slightly lowers the vertical position of the LED with respect to the central position O of the condenser lens 4 in the vertical direction, and emits light upward in the vertical direction. Thereby, the light distribution characteristic 7b in the vertical direction can be obtained.

  That is, by arranging a plurality of light source devices and adjusting the position of the LED module 1, the light distribution characteristic in the vertical direction can be easily adjusted.

  Even when three light source devices are stacked in the vertical direction as described above, the light distribution characteristics in the vertical direction change, so that the vertical angle is -1 °, -10 °, and the vertical angle of the beam is 3 ° to 7 °. The specification can be satisfied.

  In order to satisfy the specifications shown in Table 1, the light source device for turning the light beam upward or downward may be any of the upper, middle, and lower light source devices.

  Further, instead of slightly raising and lowering the vertical position of the LED with respect to the vertical center position O of the condenser lens 4, the vertical center position O of the condenser lens 4 with respect to the vertical position of the LED. Even if it is changed, the same effect as described above can be obtained.

  The aviation obstacle light according to Embodiment 5 of the present invention is characterized in that the specifications in Table 1 are satisfied by arranging a plurality of light source devices in the vertical direction and changing the LED current value in the light source device at each stage. .

  For example, as shown in FIG. 7, three stages of light source devices 3A1, 3A2, and 3A3 are arranged, and the LED control circuit 11 uses the LED current value of the lower light source device 3A3 with respect to the LED current value of the middle light source device 3A2. And the LED current value of the upper light source device 3A1 is optimally controlled.

  As a result, the specifications shown in Table 1 can be satisfied with respect to vertical angles of −1 °, −10 °, and beam angles of vertical 3 ° to 7 °.

  In the above-described example, the LED current value of the lower light source device 3A3 is lowered. However, the present invention is not limited to this, and the upper, middle, and lower light sources are satisfied so as to satisfy the specifications in Table 1. The LED current value of the device may be changed. Further, the LED current may be apparently changed by PWM control.

  Further, at a vertical angle of −10 °, the light source device may be provided with a light shielding plate in the vertically downward direction so that the effective luminous intensity is 3% or less of the ratio of the peak value to the minimum allowable value. Thereby, the -10 degree direction inside an aircraft obstruction light can be suppressed.

  A light shielding plate may be attached outside the light source device. Alternatively, instead of the light shielding plate, an optical filter that attenuates light is provided in the light source device, so that the −10 ° direction inside the aviation obstacle light can be suppressed.

  FIG. 8 shows the configuration of an aircraft obstacle light according to Embodiment 6 of the present invention. In FIG. 8A, three high-luminance aviation obstacle lights 12a, 12b, and 12c attached to the high-rise building 20a are arranged around the high-rise building 20a and at substantially equal intervals in the horizontal direction. Since this high-rise structure 20a is cylindrical and has a diameter of less than 6 m, and the surroundings are within the specified range, three high-luminance aviation obstacle lights 12a, 12b, and 12c are arranged. Thereby, it can distribute light over the perimeter of the circumferential direction. Therefore, the specifications in Table 1 can be satisfied over the entire circumference in the circumferential direction.

  On the other hand, in FIG. 8B, four high-luminance aviation obstruction lights 12a, 12b, 12c, and 12d attached to the high-rise building 20b are arranged around the high-rise building 20b and at substantially equal intervals in the horizontal direction. doing. Since the high-rise structure 20b is cylindrical and has a diameter of 6 m or more and less than 30 m and the surrounding area is not less than a specified value, four high-luminance aviation obstacle lights 12a, 12b, 12c, and 12d are arranged. Thereby, it can distribute light over the perimeter of the circumferential direction. Therefore, the specifications in Table 1 can be satisfied over the entire circumference in the circumferential direction.

  Further, it is desirable that the flashes of the plurality of high-luminance aviation obstacle lights in the circumferential direction emit the same light in synchronization with each other. Further, when the high-rise structure has a small diameter or a high-luminance aviation obstruction light is installed above the high-rise structure, an omnidirectional apparatus in which a plurality of aviation obstruction light apparatuses are combined may be used.

  As described above, by optimizing the arrangement of the LED substrate 2, the arrangement of the condenser lens 4, the diffusing lens 5 and the LED module 1, the specifications in Table 1 are satisfied, the vertical direction is very narrow, and the horizontal direction is A wide range of highly accurate optical characteristics can be realized.

  FIG. 9 shows the configuration of an aircraft obstacle light according to the seventh embodiment. As shown in FIG. 9A, the three light source devices 3A, 3B, 3C are arranged at 45 ° intervals in the horizontal circumferential direction.

  The central light source device 3B has a plurality of LED module rows arranged at intervals adjusted with respect to the vertical direction of the condenser lens, the number of LEDs in each LED module row is different from each other, and the LED modules of the left and right light source devices 3A and 3C. More than the number.

  In the central light source device 3B, as shown in FIG. 9B, two rows of LED modules are arranged for each of the three stages with respect to the vertical direction of the condenser lens 4, and the left and right light source apparatuses 3A, 3C. As shown in FIG. 9A, one row of LED modules is arranged in the vertical direction of the condenser lens 4.

  Thereby, the specification of a light distribution characteristic can be satisfied. Note that all of the three light source devices 3A, 3B, 3C may have two rows of LED modules arranged in the vertical direction of the condenser lens 10. Alternatively, the central light source device 3 </ b> B may arrange one row of LED modules, and the left and right light source devices 3 </ b> A and 3 </ b> C may arrange two rows of LED modules with respect to the vertical direction of the condenser lens 10. Also in these cases, the specification of the light distribution characteristic can be satisfied by the combination.

  The present invention is not limited to the high-luminance aviation obstacle light shown in Table 1, but may be a medium-luminance aviation obstacle light.

DESCRIPTION OF SYMBOLS 1 LED module 2 LED board 3 Case 3a Opening part 3A, 3B, 3C Light source device 3A1, 3A2, 3A3 Multiple stage 4 Condensing lens 5 Diffusing lens 7a, 7b Light distribution characteristic 10A, 11 LED control circuit 12a, 12b, 12c, 12d Light source device 20a, 20b High-rise structure 10 Cooling fin

Claims (11)

A housing body that houses an LED substrate on which an LED module configured by connecting a plurality of LEDs in series is mounted, and a condensing lens that is disposed in an opening of the housing body and condenses the light of the LED in the vertical direction A plurality of light source devices that have a diffusion lens that is superimposed on the condenser lens and diffuses the light of the LED in the horizontal direction, and that adjusts the light distribution characteristic in the vertical direction and the light distribution characteristic in the horizontal direction;
Each of the light source devices of the plurality of light source devices is arranged at a predetermined angle with respect to the horizontal circumferential direction and is connected to each other. The plurality of light source devices includes three light source devices,
The aviation obstruction light according to claim 1, wherein the predetermined angle is an angle at which light in a horizontal direction of the light source device overlaps light in a horizontal direction of a light source device adjacent to the light source device.   The aircraft obstacle light according to claim 2, wherein the predetermined angle is in a range of 30 ° to 60 °.   The aviation obstruction light according to claim 2 or 3, wherein the light source devices on both sides of the central light source device among the three light source devices have a light intensity smaller than that of the central light source device.   5. The light source device on both sides with respect to the central light source device among the three light source devices has a smaller current for driving the LED than the central light source device. Aviation obstruction light according to item 1.   5. The light source device on both sides with respect to the central light source device among the three light source devices has a smaller number of LEDs than the central light source device. 6. The aviation obstruction light described.   Each of the light source devices is arranged in a plurality of stages with respect to the vertical direction, and for each light source device of each stage of the plurality of light source devices, with respect to a central position in the vertical direction of the condenser lens, The aircraft obstacle light according to any one of claims 1 to 6, wherein the vertical light distribution characteristic is adjusted by changing a vertical position of the LED module in the vertical direction.   Each of the light source devices includes an LED control circuit that is arranged in a plurality of layers in the vertical direction and adjusts a current for driving the LED for each light source device of the plurality of light source devices. The aviation obstruction light according to any one of claims 1 to 6.   The aviation obstruction light according to any one of claims 1 to 8, wherein each of the light source devices includes a light shielding portion in the vertically downward direction.   10. The light source device according to claim 1, wherein the plurality of light source devices are arranged around the high-rise structure in the horizontal direction, and distribute light over the entire circumference in the circumferential direction. The aviation obstruction light described.   One light source device of the central light source device and the light source devices on both sides of the three light source devices has a plurality of LED modules arranged at intervals adjusted in the vertical direction. The aviation obstacle light according to any one of claims 2 to 10, wherein the number of LEDs is different from each other, and the other light source device has the LED modules arranged in a row in the vertical direction.

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