Precision approach path indicator lamp

Abstract

The invention discloses a precision approach path indicator lamp comprising an angle measuring device, a display module, a lamp box outer shell, a support assembly and at least four sets of optical units. The at least four sets of the optical units are arranged in the lamp box outer shell, each group of the optical units comprises light sources, an optical filter, a first lens and a second lens, all the light sources are horizontally distributed, and the first lenses, the optical filters and the second lenses are sequentially distributed in a straight line in front of the light sources in the light direction. The angle measuring device is arranged in the lamp box outer shell, connected with the display module and used for measuring an elevation angle of the lamp box outer shell. The display module is arranged on the outer side of the lamp box outer shell, located at the rear ends of the optical units and used for displaying an elevation angle value measured by the angle measuring device. The support assembly is arranged at the lower end of the lamp box outer shell.

Description

technical field [0001] The invention relates to lighting equipment, in particular to a precision approach channel indicator lamp. Background technique [0002] In the prior art, the usual PAPI (Precision Approach Path Indicator) lamps are composed of 1-3 groups of independent optical units, and one light source of each optical unit is equipped with a group of lenses. Due to the batch material of the light emitting device The difference of the light source causes the light-to-heat conversion efficiency of the light source to be unstable, so that the luminous flux of each light source has a large negative error (the error is usually ≥ 15%), resulting in insufficient output light intensity, which directly affects the visual aid effect of the pilot. . Secondly, due to the high power of each single light source, usually the power of each light source is more than 200W, so the heat of the light source is concentrated, and it is not suitable for rapid heat dissipation, resulting i...

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Problems solved by technology

[0002] In the prior art, the usual PAPI (Precision Approach Path Indicator) lamps are composed of 1-3 groups of independent optical units, and one light source of each optical unit is equipped with a group of lenses. Due to the batch material of the light emitting device The difference of the light source causes the light-to-heat conversion efficiency of the light source to be unstable, so that the luminous flux of each light source has a large negative error (the error is usually ≥ 15%), resulting in insufficient output light intensity, which directly affects the visual aid effect of the pilot.

Secondly, due to the high power of each single light source, usually the power of each light source is above 200W, so the heat of the light source is concentrated, and it is not suitable for rapid heat dissipation, resulting in color temperature changes and serious light decay.

Due to the small number of lens horizontally arranged groups and the small horizontal beam angle, the visibility and clarity of visual aids are poor

[0003] In addition, in the PAPI lamps of the prior art, in order to dissipate heat better, the display is usually placed in front of the light source. Usually, when the PAPI lamp is installed, debugged and calibrated, it is necessary to open the top cover of the lamp body or view the angle display through the front lampshade. It will cause the adjusted angle to change when the cover is fastened, or visual errors will occur when viewing from the front of the lampshade due to too strong light, resulting in repeated adjustments or large adjustment errors

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