LED visual approach gradient indicating system for helicopter field

Abstract

The utility model discloses an LED visual approach gradient indicating system for a helicopter farm. The LED visual approach gradient indicating system comprises two LED assembling units, each assembling unit is composed of a plurality of red LEDs, a plurality of green LEDs, a plurality of collimating lenses, a light beam combiner and an imaging lens. The LEDs of each assembly unit are divided into four groups, namely flashing red, stable red, stable green and flashing green; the light beam combiner is used for combining four beams of light of flashing red light, stable red light, stable green light and flashing green light into one beam; the red LED is positioned at the upper part of the green LED, and a collimating lens is arranged in front of each LED; light beams emitted by the LED are collimated by the collimating lens, four light beams are combined into one light beam by the beam combiner, and the light beam is projected to a distance by the imaging lens to form four areas; and the flash red color, the stable red color, the stable green color and the flash green color are respectively arranged from bottom to top.

Description

Technical Field

[0001] The utility model relates to the technical field of airport lighting indication systems, and more particularly to an LED visual approach slope indication system for a helicopter airport. Background Art

[0002] The Heliport Approach Path Indicator (HAPI) system guides the aircraft to the correct descent by changing the color of a light source: an upper green light (with an upper flashing light and a lower constant light) and a lower red light (with an upper constant light and a lower flashing light). Figure 2 The currently widely used visual approach slope indicator system uses a white light, such as an incandescent lamp, and red and green filters to produce a two-color beam. A mechanical method then converts part of the beam into a flash. A disadvantage is that mechanical failures can easily cause the flash to disappear. Utility Model Content

[0003] The purpose of the utility model is to provide an LED visual approach slope indication system for a helicopter airport, in order to solve the technical problems in the background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An LED visual approach slope indicator system for a helicopter airport comprises two LED assembly units; each assembly unit comprises a plurality of red LEDs, a plurality of green LEDs, a plurality of collimating lenses, a beam combiner, and an imaging lens; the LEDs in each assembly unit are divided into four groups, namely flashing red, steady red, steady green, and flashing green; the beam combiner is used to combine four light beams, namely, flashing red, steady red, steady green, and flashing green, into one; the red LED is located above the green LED, and a collimating lens is located in front of each LED; the light beams emitted by the LED are collimated by the collimating lens, and the four light beams are combined into one light beam by the beam combiner, which is projected to a distant area by the imaging lens; from bottom to top, the four light beams are respectively: flashing red, steady red, steady green, and flashing green.

[0006] In some embodiments, the optical combiner is composed of multiple light-transmitting layers and reflective layers.

[0007] In some embodiments, a reflector is further included, and the reflector is respectively arranged at the collimating lenses at both ends, and is used to reflect the light beams emitted from the collimating lenses at both ends to the optical combiner.

[0008] In some embodiments, the red LEDs are provided in four rows, the first row from top to bottom corresponds to a steady red light, and the remaining three rows correspond to a flashing red light.

[0009] In some embodiments, the green LEDs are arranged in four rows, the first row from bottom to top corresponds to a steady green light, and the remaining three rows correspond to flashing green light.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This utility model features a novel structure and strong practicality. It utilizes red and green LEDs, resulting in high luminous efficiency, with the flash generated by the LED driver. The lack of mechanical moving parts enhances system reliability. The complementary beams generated by the two LED assembly units enhance light intensity uniformity. Using different drivers for each LED enhances system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of an LED visual approach slope indication system for a helicopter airport.

[0013] Figure 2 This is a working diagram of the helicopter airport LED visual approach slope indication system.

[0014] Illustration: 1: Imaging lens, 2: Reflector, 3: Collimating lens, 4: Photobeam combiner. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0016] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0017] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0018] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0019] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or display that comprises a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product, or display.

[0020] The following will be combined Figure 1 , a LED visual approach slope indicator system for a helicopter airport involved in an embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation of the present application.

[0021] Embodiment 1:

[0022] like Figure 1 As shown, an LED visual approach slope indicator system for a helicopter airport comprises two LED assembly units; each assembly unit is composed of several red LEDs, several green LEDs, several collimating lenses 3, a beam combiner 4, and an imaging lens 1. The LEDs in each assembly unit are divided into four groups: flashing red, steady red, steady green, and flashing green. The beam combiner is used to combine the four light beams of flashing red, steady red, steady green, and flashing green into one beam. The beam combiner is composed of multiple light-transmitting layers and reflective layers. The red LED is located above the green LED, and a collimating lens is placed in front of each LED. The light beams emitted by the LEDs are collimated by the collimating lenses, and the four light beams are combined into one beam by the beam combiner. The imaging lens projects the light into four distant areas: from bottom to top: flashing red, steady red, steady green, and flashing green.

[0023] In some embodiments, a reflector 2 is further included, which is respectively arranged at the collimating lenses at both ends and is used to reflect the light beams emitted from the collimating lenses at both ends to the optical combiner.

[0024] Attachment Figure 1In the figure, from top to bottom, the first row of LEDs corresponds to steady red light. Rows 2, 3, and 4 correspond to flashing red light. Rows 5, 6, and 7 correspond to flashing green light. Row 8 corresponds to steady green light. Because the steady red and green lights cover a small angle, only one row of LEDs is used for each. The flashing light covers a large angle, so multiple rows of LEDs are used. Figure 1 One LED in the image is actually a row. The 1st and 8th rows are on the upper and lower sides, and the light is reflected to the middle by the reflector.

[0025] The above description is only a preferred embodiment of the present invention and is used to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An LED visual approach slope indication system for a helicopter airport, characterized in that: It includes two LED assembly units; each assembly unit consists of several red LEDs, several green LEDs, several collimating lenses, a photosynthesizer and an imaging lens; the LEDs in each assembly unit are divided into four groups, namely flashing red, stable red, stable green, and flashing green; the photosynthesizer is used to combine the four beams of light, namely flashing red, stable red, stable green, and flashing green, into one beam; the red LED is located above the green LED, and there is a collimating lens in front of each LED; the light beams emitted by the LED are collimated by the collimating lens, and the four beams of light are combined into one beam by the beam combiner, which is projected to a distance by the imaging lens to form four areas; from bottom to top, they are: flashing red, stable red, stable green, and flashing green.

2. The LED visual approach slope indication system for a helicopter airport according to claim 1, characterized in that: The optical beam combiner is composed of multiple light-transmitting layers and reflective layers.

3. The LED visual approach slope indication system for a helicopter airport according to claim 1, characterized in that: It also includes reflecting mirrors, which are respectively arranged at the collimating lenses at both ends and are used to reflect the light beams emitted from the collimating lenses at both ends to the optical beam combiner.

4. The LED visual approach slope indication system for a helicopter airport according to claim 1, characterized in that: The red LEDs are arranged in 4 rows, the first row from top to bottom corresponds to a steady red light, and the remaining three rows correspond to a flashing red light.

5. The LED visual approach slope indication system for a helicopter airport according to claim 1, characterized in that: The green LEDs are arranged in 4 rows, the first row from bottom to top corresponds to steady green, and the remaining three rows correspond to flashing green.

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