FI124979B - Flight obstacle light - Google Patents

Description

The present invention relates to a horizontal anti-radiation flight barrier lamp operated by LEDs.

Anti-theft lights are lighting devices that are attached to tall buildings or similar to prevent aircraft from colliding with structures. The luminaires increase the visibility of tall structures and are used mainly at night, but also during the day if necessary. Typically, the lights are constantly on or flashing red lights or white flashing lights. The type of light, the type of application, the method of lighting, the intensifier and many other factors are determined by national and international regulations such as ICAO, FAA air traffic regulations. The benefits of LED lighting are long service intervals, high reliability and long service life. Thus, they are particularly well suited for structures or long distances due to difficult access. WO 97/29320 discloses an anti-blocking lamp in which the light source consists of LEDs, for example, placed on overlapping circuit boards on their outer periphery so as to provide horizontally radiating light emitted by a particular beam. DE 3806217 describes an LED lamp having a cylindrical tubular body around which the LEDs are arranged in three layers at regular intervals around the housing. In GB2350176, LED light sources are disposed on a circular circuit board which is flanged to the edge of the plate-like body members. In it, light is emitted from the LEDs upwards and directed by the lenses sideways. The solution provides a modular structure in which the lighting units can be stacked on top of each other.

The anti-skid light beams must meet the exact regulatory requirements. These requirements include light power and beam width. In horizontally omnidirectional light, the intensity of the beam should be as uniform as possible over the entire circle illuminated by the beam. In LEDs, the light emitted by the light source is controlled by the lenses. In the vertical direction, for example, forming a three-degree beam with a good efficiency requires a large lens. For example, the fresnell lens has a horizontal light distribution of about 120 degrees.

As the intensity of light emitted from the lens decreases on the sides of the light, a lower intensity region is formed between the two lenses. In order to obtain a smooth spotlight circle on the circumference of the circle, it is necessary to mount several lenses, for example eight lenses at 45 degrees intervals, whereby their light beams partially overlap. In this way, a good and uniform omnidirectional light ring is achieved, but the lenses form a large ring. At the same time, the cost impact, weight and handling of the obstacle light will be reduced during installation.

Thus, it would be necessary to provide an omnidirectional fluorescent light, which can be implemented more cheaply. The object of the present invention is to provide a mechanically smaller fluid fluid light which provides a sufficiently uniform omnidirectional circular light beam at a lower cost.

The invention is based on providing at least two overlapping circles of single lenses in the anti-glare light such that the lenses of the at least one circumference are displaced about the center axes of the circumferentially with respect to the lenses of at least one other circumference.

According to a preferred embodiment of the invention, the lenses are attached to a body tube having a number of sides of a cross section corresponding to the number of lenses of two overlapping lenses.

According to one preferred embodiment, there are two overlapping rings.

According to one preferred embodiment, the lenses are positioned such that the lenses of the overlapping peripherals are uniformly interleaved when viewed from the center axis.

According to a further embodiment, there are two overlapping rings and four lenses each.

In one embodiment, the lens rings are concentric and uniform.

According to a particularly preferred embodiment, the light source is formed by mounting at least one LED on the circuit board and attaching a lens to the same circuit board. More specifically, the arrangement of the invention is characterized by what is stated in the characterizing parts of the independent claim.

Preferred embodiments of the invention are further defined in the dependent claims.

The invention provides considerable advantages.

The invention provides a small circular light bulb or beam with a small outer diameter of the lamp. Compared to known solutions, the required diameter of an anti-aircraft light can be reduced by 30-50% up to half, which has a dramatic impact on weight, cost and installation. The price of the luminaire is, of course, a competitive advantage, but since these devices are typically installed in high and hard-to-reach places, weight and light size play an important role in installation work. It is always advantageous if heavy lifting and securing equipment is not needed and light equipment can be handled much more easily

The invention will now be explained in more detail with reference to the accompanying drawings.

Figures 1-4 illustrate one embodiment of the invention in different positions.

Figures 5-8 show the embodiment of Figures 1-4 with the lenses removed.

In the example of the figures, 4 + 4 lenses are arranged in polygonal body 1 in two overlapping circles 3, 4. The central axis KLed of each lens is between the central axes KLed of two lenses below or above it, so that the lenses are so called. the central optical axes are at an angle of 45 ° to the KL axis of the lamp axis. The center of the wedge-shaped beam of each lens then lies between the two lenses above or below it and illuminates the area between them. The lenses of the overlapping lens frames 3, 4 overlap slightly at their peripheral regions. The shape of the beam formed by the lens, of course, depends on its structure and implementation. By this optical center axis is meant the axis of the beam, on which both sides of the beam are as symmetrical as possible. In the structures of the invention, it is advantageous to seek symmetry and that the lenses are similar to each other. In this case, the structure and cost can be considered inexpensive. As such, there is no obstacle to the use of asymmetric structures, as long as the overlapping lenses are spaced so that the area between the lenses of the first ring is illuminated by the lenses of the second ring. It is also contemplated that there will be three, four, or more staggered lenses relative to each other, according to the lenses required. In this case, the stepping may be done in small steps or in pairs according to the example described. So far, the most uniform light distribution has been obtained with two overlapping rings using four lenses in each ring. Other inexpensive alternatives are the 2 + 2, 3 + 3 and 5 + 5 lenses, but as such there is nothing to prevent the use of other alternatives and even different amounts of lenses in different frames. However, you may need to use quite a lot of lenses to achieve even lighting. The lens rings 3, 4 can also have different diameters.

The invention utilizes the prior art hollow frame structure of the applicant. There are flat bodies 2 on the sides of the body which form the mounting surfaces for the circuit boards 5. An anti-obstruction light with an octagonal body 1 is required for an anti-obstruction light having 4 + 4 lenses. The invention preferably applies to the applicant's previous body structure. be provided with a lining 8 to improve heat transfer.

The lenses and their LEDs or similar semiconductor light sources form a light sector having a certain horizontal angle of illumination. For example, when using a Fresnel lens, the illumination angle is approximately 120 ° sideways. The lens is shaped and dimensioned to determine its beam height and usually opens at 3 °. The lenses are assembled on a circuit board 5. In this example, the circuit board 5 is T-shaped, with the crossbar forming a mounting surface for the LED components 9 and the lens 6. The LED is in the center of the T-bar and is symmetrically surrounded by the lens. Since the entire lateral or horizontal orientation of the lens is determined by the luminous efficacy and structure of the illuminating sector, the width of the circuit board T-bar is determined by the width of the lens and thus determines the lateral extension of the circuit board. The vertical portion 11 of the T-piece is mainly for mounting on the printed circuit board body 2. 5-8, the vertical portions 11 of the upper circuit boards extend downwardly along the frame between the T-beams. Correspondingly, the outer ends of the T-beam extend to the sides of the body 1 beyond the width of each side member 2. In this way, a very compact structure is obtained in which each lens rim 3, 4 forms a square. To form an omnidirectional light ring, the second lens ring is positioned below the first so that its circuit boards and light sectors are attached to the bodies 2 between the bodies 2 of the body 1 to which the circuit boards of the first lens ring are attached.

The structure works similarly with other cross sections and lens quantities. Only one LED is used in this solution, but several LEDs can be used. Advantageously, the LEDs can be placed side by side on a horizontal printed circuit board, so that even one compact lens provides high light output using up to five LED light sources. The desired luminous intensity can be varied by using different numbers of LEDs or different types of LEDs in different sectors. The lens structure may be modified within the scope of the invention as described above. To protect your lenses and other structure, you have a transparent protective dome around it.

The power supply, control, and other structure of the anti-fly light are not described in further detail as they are not within the scope of the invention.

Claims (3)

A flight obstacle light comprising - a body (1) with sides (2) forming fastening surfaces - attached to the body of light sectors comprising at least one LED (9) and at least one from this separate lens (6) for directing the light; and - the total amount of the light barrier light sectors is at least four, at least two light sectors are arranged vertically on each other, and each light sector lens is wider than the side (2) of the body (1), characterized in that each lens (6) and LED (9) ) is attached to a circuit board (5) whose dimension in the lateral direction of the lens (6) corresponds to the width of the lens (6) and is larger than the fastening side of the body (1). Flight obstacle light according to claim 1, characterized in that at least one LED is arranged under one lens and that in different layers or light sectors a different number of LEDs are arranged under one lens. A flight barrier light according to any one of the preceding claims, characterized in that the flight barrier light comprises at least two superposed rings formed of individual lenses, which rings are arranged in such a way that at least one ring lenses seen from the direction of the center axes of the rings are displaced in the direction of the circle drawn around the center shafts in relation to at least one other ring's lenses.