CN111578233A - Anti-collision lamp - Google Patents

Anti-collision lamp Download PDF

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Publication number
CN111578233A
CN111578233A CN202010328534.2A CN202010328534A CN111578233A CN 111578233 A CN111578233 A CN 111578233A CN 202010328534 A CN202010328534 A CN 202010328534A CN 111578233 A CN111578233 A CN 111578233A
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Prior art keywords
lens
light
total reflection
refraction
emergent
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Chinese (zh)
Inventor
胡民浩
赵艺多
李毅宏
奚健锋
乔晓涛
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Shaanxi Ruishi Electronic Technology Co ltd
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Shaanxi Ruishi Electronic Technology Co ltd
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Priority to CN202010328534.2A priority Critical patent/CN111578233A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/046—Refractors for light sources of lens shape the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/041—Optical design with conical or pyramidal surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/30—Use or application of lighting devices on or in particular types of vehicles for aircraft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention discloses an anti-collision lamp, relates to the technical field of electrical lighting of airplanes, and aims to solve the problems of overlarge power, insufficient uniformity of light in a space range, complex structure, poor weather resistance and the like of the traditional anti-collision lamp. The anti-collision lamp comprises a shell, a lens and an LED light source assembly, wherein the lens is embedded in the top of the shell, and the LED light source assembly is positioned in the shell and arranged below the lens; the lens is a rotating body, a conical groove is formed on the upper end surface of the lens, a flat groove is formed on the lower end surface of the lens, and the peripheral surface of the lens is transited from an inclined surface to a spherical surface from top to bottom; the angle range of total reflection of light emitted by the LED light source component through the lens is theta epsilon [0, 46.85 DEG ], and the angle range of refraction is theta epsilon [46.85 DEG, 90 ]. According to the invention, accurate light distribution of the Lambert light source is realized through the free-form surface in a total reflection and refraction mode, so that light distribution and light source protection of light emitted by the LED light source component are realized.

Description

Anti-collision lamp
Technical Field
The invention relates to the technical field of electric lighting of airplanes, in particular to an anti-collision lamp.
Background
When the airplane is in a running state, the anti-collision lamp emits flashing light with a certain frequency, so that clear position information is provided for other adjacent airplanes, and personnel and vehicles nearby on the ground prompt that an engine of the airplane is in a running state and pay attention to keeping a safe distance with the airplane.
At present, most of anti-collision lamps are still provided with traditional light sources, and the traditional light sources have the defects of low reliability, short service life, high power consumption and the like. With the development of the LED technology, the aircraft lamp using the LED as the light source has the advantages of low power consumption, less heat generation, long service life, firmness, durability and the like, so that the demand of applying the LED to the anti-collision lamp is increasingly strong. However, due to the light emitting mechanism of the LED light source, the emitted light is lambertian light intensity distribution, so that the LED light source cannot be directly used to replace the conventional light source for the application of the anti-collision lamp.
The existing LED anti-collision lamp product has the following problems: 1) most products are light distribution of the reflecting cup, and the coating of the reflecting cup is easy to oxidize and fall off, so that the light distribution efficiency and the light emitting effect are influenced; 2) the product cannot meet the uniformity of light intensity in an annular range in the horizontal direction; 3) the product grading system needs protective structure in addition, leads to crashproof lamp overall structure more complicated. There is an urgent need for an anti-collision lamp that can solve the above problems.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an anti-collision lamp, which is used to solve the problems of the conventional anti-collision lamp, such as excessive power, insufficient uniformity of light in a spatial range, complex structure, and poor weather resistance.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an anti-collision lamp comprises a shell, a lens and an LED light source assembly, wherein the lens is embedded in the top of the shell, and the LED light source assembly is positioned in the shell and arranged below the lens; the lens is a rotating body, a conical groove is formed on the upper end surface of the lens, a flat groove is formed on the lower end surface of the lens, and the peripheral surface of the lens is transited from an inclined surface to a spherical surface from top to bottom to form a total reflection area and a refraction area; the angle range of total reflection of light emitted by the LED light source component through the total reflection region is theta epsilon [0 degrees ] and 46.85 degrees ], and the angle range of refraction through the refraction region is theta epsilon [46.85 degrees ] and 90 degrees ].
Furthermore, the lens comprises a refraction incidence surface, a total reflection surface, a total reflection emergent surface, a transition surface and a refraction emergent surface, wherein the refraction incidence surface is a rotating surface with a demoulding inclination, the total reflection incidence surface is a plane perpendicular to the light emitting direction of the LED light source component, and the refraction incidence surface and the total reflection incidence surface are connected to form the flat groove; the total reflection reflecting surface is a rotating body with a curved bus and a downward vertex so as to form the conical groove; the total reflection emergent surface, the transition surface and the refraction emergent surface are positioned on the peripheral surface, the total reflection emergent surface is a cylindrical surface with a demoulding inclination, and the concave transition surface and the convex refraction emergent surface are sequentially arranged below the total reflection emergent surface.
Further, the release slope of the refraction incidence surface is 5 °.
Further, the LED light source assembly comprises a printed circuit board and a plurality of LED light sources, and the LED light sources are arranged on the printed circuit board in an array form; the LED light sources are red light sources or white light sources.
Further, still include to be located the drive power supply of casing, drive arrangement control connection the LED light source subassembly to control a plurality of LED light source scintillation, the flash of light frequency is 60 times/minute.
Furthermore, a plurality of cavities are arranged in the shell, and the driving power supply and the LED light source assembly are respectively positioned in different cavities.
Furthermore, a flange is further arranged on one circle of the bottom of the lens, a pressing ring is further fixedly connected to the shell, and the shell fixes the lens by pressing the flange with the pressing ring; and a sealing ring is also arranged between the flange and the pressing ring.
Furthermore, the section of the sealing ring along the longitudinal direction of the lens is U-shaped, and the sealing ring is made of silicon rubber; the lens is made of glass.
Furthermore, annular heat dissipation fins are uniformly distributed on the periphery of one end, close to the driving power supply, of the shell.
Further, the determination of the surface profile of the lens is:
dividing the angle theta of light rays incident to the lens into two parts, wherein the total reflection theta belongs to [0 DEG, 46.85 DEG ], and the refraction theta belongs to [46.85 DEG, 90 DEG ];
reflecting the totally reflected emergent light to alpha epsilon to [85 degrees, 90 degrees ], planning the emergent total reflection angle alpha to be a plurality of parts, and enabling the luminous fluxes in delta alpha to be equal to each other based on
Figure BDA0002464107060000031
Let Δ ΦLight source＝ΔΦReflective lensObtaining the angle corresponding relation between the incident light and the emergent light of the total reflection lens;
calculating to obtain the contour coordinate of the total reflection incident surface according to the unit vector of the emergent light of the incident surface and the geometric relation of the incident light;
using the law of refraction: n iso×sinθ＝ni×sinα
Wherein n isoIs the refractive index of air, niThe refractive index of the lens is theta, the included angle between the incident light and the normal of the incidence surface of the total reflection lens is theta, α is the included angle between the emergent light and the normal of the incidence surface, and the unit vector of the incident light of the total reflection surface is obtained;
when n isoIs the refractive index of air, niThe refractive index of the lens is theta, the included angle between the emergent light ray of the total reflection lens and the normal is theta, α is the included angle between the incident light ray of the emergent surface and the normal, and the unit vector of the emergent light ray of the total reflection surface is obtained;
combining the unit vector of the emergent ray of the total reflection reflecting surface and the unit vector of the emergent ray of the total reflection incident surface, and obtaining a normal vector of the total reflection reflecting surface corresponding to an incident point through a Snell formula:
Figure BDA0002464107060000041
wherein the content of the first and second substances,
Figure BDA0002464107060000042
is a unit vector of the outgoing light,
Figure BDA0002464107060000043
is the unit vector of the incident light ray,
Figure BDA0002464107060000044
is the normal vector at the point of incidence;
calculating the coordinate point of the totally reflected curved surface by using a tangent plane iteration method and the outline size of the lens:
Figure BDA0002464107060000045
wherein the content of the first and second substances,
Figure BDA0002464107060000046
the surface is a curved surface tangent line, and two adjacent points which are infinitely close can be approximately solved to obtain a set of all surface points of total reflection;
the starting point of the refraction incidence surface is a coordinate point of the total reflection incidence surface when the light source angle theta is 46.85 degrees, and the contour coordinate of the refraction incidence surface is obtained according to the determined demoulding inclination of the light chamber and the light source incidence angle;
the light flux that needs to be emitted by refraction is: phiRefractive lens＝ΦGeneral assembly-ΦTotal reflection lens
There are formulas for light sources;
Figure BDA0002464107060000047
so that Δ ΦLight source＝ΔΦRefractive lensObtaining the angle corresponding relation between the refraction incident light and the refraction emergent light, calculating the incident light angle and the unit vector of the refraction emergent surface according to the incident light angle and the refraction law, calculating the normal vector of the corresponding position of the refraction emergent surface by combining the incident light unit vector and the refraction emergent light unit vector of the refraction emergent surface, and obtaining the contour coordinate of the refraction emergent surface by utilizing tangent plane iteration;
and taking the light ray corresponding to the refracted emergent ray of 90 degrees when the emergent ray angle of the light source is 90 degrees as a calculation starting point to obtain a coordinate point of the surface contour of the lens.
Compared with the prior art, the invention has the beneficial effects that:
the invention designs a lens integrating the functions of a refractive lens and a total reflection lens according to the luminous characteristics of a Lambert luminous body so as to realize the purpose of combining theta ∈ [0, pi/2 ]]、
Figure BDA0002464107060000051
The light rays within the spatial angle are precisely distributed to the desired target surface. The LED light source module realizes accurate light distribution of a Lambert light source through a free curved surface in a total reflection and refraction mode, so that light rays emitted by the LED light source module with an angle range of 0-90 degrees are divided into two parts of 0-46.85 degrees and 46.85-90 degrees, and the aims of completely utilizing luminous flux in the full angle range of LED emergent light and protecting the light source are finally realized. The invention can realize the light emitting forms of aviation red, aviation blank and the like only by replacing different LED light sources; and the structure is simpler, the production and assembly cost is reduced, and the flight safety of the airplane is improved.
Drawings
Fig. 1 is a schematic structural view of an anti-collision lamp provided by the present invention;
FIG. 2 is a schematic structural view of a lens of an anti-collision lamp according to the present invention;
FIG. 3 is a schematic structural view of a light source plate in an anti-collision lamp according to the present invention;
fig. 4 is a schematic view of a light direction of an anti-collision lamp according to the present invention.
In the figure, 1-lens, 2-LED light source component, 3-sealing ring, 4-pressing ring, 5-driving power supply, 6-shell, 11-total reflection surface, 12-total reflection outgoing surface, 13-transition surface, 14-refraction outgoing surface, 15-flange, 16-total reflection incoming surface, 17-refraction incoming surface, 21-printed circuit board, 22-LED light source.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention provides an anti-collision lamp, which comprises a shell 6, a lens 1 and an LED light source component 2, wherein the lens 1 is embedded at the top of the shell 6, and the LED light source component 2 is positioned in the shell 6 and is arranged below the lens 1; the lens 1 is a rotating body, a conical groove is formed on the upper end surface of the lens 1, a flat groove is formed on the lower end surface of the lens, and the peripheral surface of the lens is transited from an inclined surface to a spherical surface from top to bottom to form a total reflection area and a refraction area; the angle range of the total reflection of the light emitted by the LED light source component 2 through the total reflection region of the lens 1 is theta epsilon [0 degrees ] and 46.85 degrees ], and the angle range of the refraction through the refraction region of the lens 1 is theta epsilon [46.85 degrees ] and 90 degrees ].
The invention designs a lens integrating the functions of a refraction lens and a total reflection lens according to the light-emitting characteristics of a Lambert luminous body so as to accurately distribute light rays in space angles of theta ∈ [0, pi/2 ] and phi ∈ [0,2 pi ] to a required target surface. The LED light source module realizes accurate light distribution of a Lambert light source through a free curved surface in a total reflection and refraction mode, so that light rays emitted by the LED light source module with an angle range of 0-90 degrees are divided into two parts of 0-46.85 degrees and 46.85-90 degrees, and the aims of completely utilizing luminous flux in the full angle range of LED emergent light and protecting the light source are finally realized. The invention can realize the light emitting forms of aviation red, aviation blank and the like only by replacing different LED light sources; and the structure is simpler, the production and assembly cost is reduced, and the flight safety of the airplane is improved.
Further, as shown in fig. 2, the lens 1 includes a refraction incident surface 17, a total reflection incident surface 16, a total reflection reflecting surface 11, a total reflection exit surface 12, a transition surface 13 and a refraction exit surface 14, the refraction incident surface 17 is a rotation surface with a mold release slope, and the mold release slope may be 5 °; namely, the total reflection incident surface 16, the total reflection reflecting surface 11 and the total reflection emergent surface 12 form a total reflection area, and the refraction incident surface 17 and the refraction emergent surface 14 form a refraction area. The total reflection incident surface 16 is a plane perpendicular to the light emitting direction of the LED light source assembly 2, and the refraction incident surface 17 is connected with the total reflection incident surface 16 to form the flat groove; the total reflection reflecting surface 11 is a rotating body with a curved generatrix and a downward vertex so as to form the conical groove; the total reflection emergent surface 12, the transition surface 13 and the refraction emergent surface 14 are positioned on the peripheral surface, the total reflection emergent surface 12 is a cylindrical surface with a demoulding inclination, and the concave transition surface 13 and the convex refraction emergent surface 14 are sequentially arranged below the total reflection emergent surface 12.
Specifically, the corresponding relation between the emergent angle alpha and the target space luminous flux is calculated according to the light intensity distribution requirement of the anti-collision lamps in GJB 2020A-2012. Referring to fig. 4, the formula used:
Figure BDA0002464107060000071
wherein IαThe light intensity value is obtained according to the required light intensity distribution fitting and changes along with the angle, and omega is an emergent space solid angle.
It is found after calculation that the angle θ of the light incident on the lens 1 from the LED light source 22 can be divided into two parts: the total reflection theta is belonged to 0 degrees, 46.85 degrees, and the refraction theta is belonged to 46.85 degrees, 90 degrees. The emergent light of total reflection is reflected to alpha epsilon [85 degrees, 90 degrees ], the light fluxes in delta alpha are ensured to be equal, delta alpha is obtained by dividing the angle of the emergent light of total reflection into a plurality of equal parts (namely, one part of equal light fluxes in each angle), and the formula is as follows:
Figure BDA0002464107060000081
so that Δ ΦLight source＝ΔΦReflective lensTherefore, the angle corresponding relation between the incident light and the emergent light of the total reflection lens is obtained.
The total reflection incident surface 16 is a plane, a unit vector of the emergent light of the incident surface is obtained through calculation according to the law of refraction, and the contour coordinates of the total reflection incident surface 16 can be obtained through calculation according to the geometric relation of the incident light as the incident surface is a plane and has a certain height from the light source.
In particular, the total reflection exit surface 12 should have a certain release angle due to the molding process. The exit angle of the light exiting from the total reflection reflecting surface 11 can be calculated by a refraction law formula.
Using the law of refraction: n iso×sinθ＝ni×sinα
Wherein n isoIs the refractive index of air, niThe unit vector of the incident light of the total reflection surface can be obtained by taking the refractive index of the lens, theta is the included angle between the incident light of the incident surface of the total reflection lens and the normal, α is the included angle between the emergent light of the incident surface and the normal.
When n isoIs the refractive index of air, niThe unit vector of the emergent light of the total reflection surface can be obtained by taking the refractive index of the lens, theta is the included angle between the emergent light of the total reflection surface and the normal line, and α is the included angle between the incident light of the emergent surface and the normal line.
The unit vector of the emergent light of the total reflection reflecting surface 11 and the unit vector of the emergent light of the total reflection incident surface 16 are combined, and the normal vector of the incident point corresponding to the total reflection reflecting surface 11 can be calculated by using a Snell formula.
There is Snell formula:
Figure BDA0002464107060000091
wherein n isoIs the spatial refractive index of the emergent ray, niIs the spatial index of refraction of the incident light,
Figure BDA0002464107060000092
is a unit vector of the outgoing light,
Figure BDA0002464107060000093
is the unit vector of the incident light ray,
Figure BDA0002464107060000094
is the normal vector at the point of incidence.
And calculating the coordinate point of the totally reflected curved surface by using a tangent plane iteration method and the contour dimension of the lens 1.
Using the formula:
Figure BDA0002464107060000095
wherein
Figure BDA0002464107060000096
The tangent line of the curved surface can be approximately obtained by two adjacent points which are infinitely close. Thus obtaining the set of all surface points.
The starting point of the refraction incidence surface 17 is a coordinate point of the total reflection incidence surface 16 when the light source angle theta is 46.85 degrees, and the contour coordinate of the refraction incidence surface 17 can be calculated according to the determined optical chamber demoulding inclination and the light source incidence angle.
The light flux that needs to be emitted by refraction is: phiRefractive lens＝ΦGeneral assembly-ΦTotal reflection lens
For light sources there are formulas
Figure BDA0002464107060000097
So that Δ ΦLight source＝ΔΦRefractive lensThe angle correspondence between the refracted incident ray and the refracted emergent ray is obtained, and the incident ray angle and the unit vector of the refracted emergent surface 14 can be calculated according to the incident ray angle and the refraction law. The unit vector of the incident light and the unit vector of the refracted emergent light of the refraction emergent surface 14 are combined to calculate the normal vector of the corresponding position of the refraction emergent surface 14, and the contour coordinate of the refraction emergent surface 14 can be calculated by using a tangent plane iteration method.
Specifically, the calculation starting point is the angle of 90 ° of the light emitted from the light source corresponding to 90 ° of the refracted emitted light.
Thus, coordinate points of the surface profile of the lens 1 are obtained, and modeling is performed to generate a lens 1 model. In particular, refraction 13 is not calculated due to the influence of the manufacturing process, and as a result, the light intensity value within the emitted light intensity [0 °, 70 ° ] is increased, while the light intensity value within [80 °, 90 ° ] is relatively decreased. The problem can be solved by only increasing the estimated power of the light source by a small amplitude, so that the lens 1 can be ensured to meet the target function, wherein the small amplitude is 2-5% increase of the power of the light source.
The lens 1 in the anti-collision lamp is particularly suitable for SMD (surface mounted device) patch light source array arrangement and COB (chip on board) light sources due to the light distribution effect. It can save artifical equipment, can make the optical effect more perfect through the optimization of secondary grading design moreover to effectively solve the problem that needs powerful and guaranteed 1 light-emitting homogeneity of lens. The secondary light distribution is a means for realizing the illumination requirement after the emergent light of the LED light source is refracted and reflected by the optical system. Here, lens light distribution is meant. To facilitate demolding during manufacture, the refracting entrance face 17 of the lens 1 has a 5 ° draft angle.
According to the existing LED technology, in order to achieve a target light intensity that is high enough, tens of LED light sources for an anti-collision lamp must be used as light emitters, as shown in fig. 3, the LED light source assembly 2 is formed by attaching a plurality of LED light sources 22 to a printed circuit board 21, different light intensity requirements can be achieved by changing the number of the LED light sources 22, and different light color requirements can be achieved by changing the chromaticity of the LED light sources 22. The LED light source 22 may be an aircraft red light source, an aircraft white light source, and may be extended to an infrared light source. The anti-collision lamp provided by the invention has strong adaptability and compatibility, and can realize the light-emitting forms of aviation red, aviation blank and the like only by replacing different LED light sources; and the structure is simpler, the production and assembly cost is reduced, and the flight safety of the airplane is improved.
It can be understood that the anti-collision lamp further comprises a driving power supply 5 positioned in the shell 6, the driving device is in control connection with the LED light source assembly 2, the anti-collision lamp provided by the invention is fixed on the airplane body through the shell 6, and is controlled by the driving power supply 5 to flash, and the driving power supply 5 drives the LED light source 22 to keep flash and strobe operation for 60 times per minute. Compare in the crashproof lamp simple structure that active service aircraft used, need not to add lamp shade protection light source and optical system in addition, improved crashproof lamp's sealing performance and reliability, the maintenance of being more convenient for.
Furthermore, a plurality of cavities are arranged in the housing 6, and the driving power supply 5 and the LED light source assembly 2 are respectively located in different cavities. The driving power supply 5 and the LED light source assembly 2 are provided with two benefits: the first is that the two heat sources are separately arranged to facilitate heat dissipation; and the second is electromagnetic shielding.
In order to facilitate the installation of the lens 1 and to ensure the sealing performance of the product, the bottom ring of the lens 1 is also provided with a flange 15. A press ring 4 is fixedly connected to the housing 6, and the housing 6 fixes the lens 1 by pressing the flange with the press ring 4; the flange with still be provided with sealing washer 3 between the clamping ring 4, sealing washer 3 parcel is on flange 15, and clamping ring 4 and casing 6 pass through screw thread or screw erection joint, through extrusion parcel sealing washer 3 on flange 15 during the installation, produce certain decrement to play sealed effect.
Preferably, the section of the sealing ring 3 along the longitudinal direction of the lens 1 is U-shaped, and the material is silicon rubber.
More preferably, the casing 6 has annular heat dissipation fins uniformly distributed on the periphery thereof near one end of the driving power supply 5. By providing multiple layers of fins on the housing 6, heat from the LED light sources 22 can be dissipated quickly to the air.
In order to improve the light distribution effect, the lens 1 is made of glass, and although the price is higher than that of a plastic material, the effect is better.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.

Claims (10)

1. An anti-collision lamp, its characterized in that: the LED lamp comprises a shell, a lens and an LED light source assembly, wherein the lens is embedded in the top of the shell, and the LED light source assembly is positioned in the shell and arranged below the lens; the lens is a rotating body, a conical groove is formed on the upper end surface of the lens, a flat groove is formed on the lower end surface of the lens, and the peripheral surface of the lens is transited from an inclined surface to a spherical surface from top to bottom to form a total reflection area and a refraction area; the angle range of the light emitted by the LED light source component totally reflected by the total reflection region is theta epsilon [0 degrees ] and 46.85 degrees ], and the angle range of the light refracted by the refraction region is theta epsilon [46.85 degrees ] and 90 degrees ].
2. The anti-collision lamp according to claim 1, characterized in that: the lens comprises a refraction incidence surface, a total reflection surface, a total reflection emergent surface, a transition surface and a refraction emergent surface from the upper end surface to the lower end surface;
the refraction incidence surface is a rotating surface with demoulding inclination, the total reflection incidence surface is a plane vertical to the light emitting direction of the LED light source component, and the refraction incidence surface and the total reflection incidence surface are connected to form the flat groove; the total reflection reflecting surface is a rotating body with a curved bus and a downward vertex so as to form the conical groove; the total reflection emergent surface, the transition surface and the refraction emergent surface are positioned on the peripheral surface, the total reflection emergent surface is a cylindrical surface with a demoulding inclination, and the concave transition surface and the convex refraction emergent surface are sequentially arranged below the total reflection emergent surface.
3. The anti-collision light of claim 2, wherein: the demolding inclination of the refraction incidence surface is 5 degrees.
4. The anti-collision lamp according to claim 1 or 2, characterized in that: the LED light source assembly comprises a printed circuit board and a plurality of LED light sources, and the LED light sources are arranged on the printed circuit board in an array form; the LED light sources are red light sources or white light sources.
5. The anti-collision light of claim 4, wherein: the LED lamp is characterized by further comprising a driving power supply located in the shell, and the driving device is connected with the LED light source assembly in a control mode to control the LED light sources to flicker.
6. The anti-collision light of claim 5, wherein: the shell is internally provided with a plurality of cavities, and the driving power supply and the LED light source assembly are respectively positioned in different cavities.
7. The anti-collision light of claim 6, wherein: a flange is further arranged at one circle of the bottom of the lens, a pressing ring is further fixedly connected to the shell, and the shell fixes the lens by pressing the flange with the pressing ring; and a sealing ring is also arranged between the flange and the pressing ring.
8. The anti-collision light of claim 7, wherein: the section of the sealing ring along the longitudinal direction of the lens is U-shaped, and the sealing ring is made of silicon rubber; the lens is made of glass.
9. The anti-collision light of claim 8, wherein: annular heat radiating fins are uniformly distributed on the periphery of one end, close to the driving power supply, of the shell.
10. An anti-collision light as claimed in claim 1 or 2, characterised in that the surface profile of the lens is determined as:
dividing the angle theta of light rays incident to the lens into two parts, wherein the total reflection theta belongs to [0 DEG, 46.85 DEG ], and the refraction theta belongs to [46.85 DEG, 90 DEG ];
reflecting the totally reflected emergent light to alpha epsilon to [85 degrees, 90 degrees ], planning the emergent total reflection angle alpha to be a plurality of parts, and enabling the luminous fluxes in delta alpha to be equal to each other based on
Figure FDA0002464107050000021
Let Δ ΦLight source＝ΔΦReflective lensObtaining the angle corresponding relation between the incident light and the emergent light of the total reflection lens;
calculating to obtain the contour coordinate of the total reflection incident surface according to the unit vector of the emergent light of the incident surface and the geometric relation of the incident light;
using the law of refraction: n iso×sinθ＝ni×sinα
Wherein n isoIs the refractive index of air, niIs the refractive index of the lens, theta is the included angle between the incident light and the normal of the incident surface of the total reflection lens, α is the included angle between the emergent light and the normal of the incident surface, and the unit direction of the incident light of the total reflection surface is obtainedAn amount;
when n isoIs the refractive index of air, niThe refractive index of the lens is theta, the included angle between the emergent light ray of the total reflection lens and the normal is theta, α is the included angle between the incident light ray of the emergent surface and the normal, and the unit vector of the emergent light ray of the total reflection surface is obtained;
combining the unit vector of the emergent ray of the total reflection reflecting surface and the unit vector of the emergent ray of the total reflection incident surface, and obtaining a normal vector of the total reflection reflecting surface corresponding to an incident point through a Snell formula:
Figure FDA0002464107050000031
wherein the content of the first and second substances,
Figure FDA0002464107050000032
is a unit vector of the outgoing light,
Figure FDA0002464107050000033
is the unit vector of the incident light ray,
Figure FDA0002464107050000034
is the normal vector at the point of incidence;
calculating the coordinate point of the totally reflected curved surface by using a tangent plane iteration method and the outline size of the lens:
Figure FDA0002464107050000035
wherein the content of the first and second substances,
Figure FDA0002464107050000036
the surface is a curved surface tangent line, and two adjacent points which are infinitely close can be approximately solved to obtain a set of all surface points of total reflection;
the starting point of the refraction incidence surface is a coordinate point of the total reflection incidence surface when the light source angle theta is 46.85 degrees, and the contour coordinate of the refraction incidence surface is obtained according to the determined demoulding inclination of the light chamber and the light source incidence angle;
the light flux that needs to be emitted by refraction is: phiRefractive lens＝ΦGeneral assembly-ΦTotal reflection lens
There are formulas for light sources;
Figure FDA0002464107050000037
so that Δ ΦLight source＝ΔΦRefractive lensObtaining the angle corresponding relation between the refraction incident light and the refraction emergent light, calculating the incident light angle and the unit vector of the refraction emergent surface according to the incident light angle and the refraction law, calculating the normal vector of the corresponding position of the refraction emergent surface by combining the incident light unit vector and the refraction emergent light unit vector of the refraction emergent surface, and obtaining the contour coordinate of the refraction emergent surface by utilizing tangent plane iteration;
and taking the light ray corresponding to the refracted emergent ray of 90 degrees when the emergent ray angle of the light source is 90 degrees as a calculation starting point to obtain a coordinate point of the surface contour of the lens.
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CN102072458A (en) * 2010-11-20 2011-05-25 特殊光电科技(中山)有限公司 Lens for LED lamp
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