Method for designing asymmetric light-emitting diode (LED) street lamp based on light distribution optimization

A technology of LED street lamps and design methods, which is applied in the direction of light sources, electric light sources, point light sources, etc., can solve the problems that restrict the performance of LED street lamp light distribution mirrors, and achieve the effect of improving the utilization rate of light energy and improving performance

Inactive Publication Date: 2012-06-13
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

In the past, the influence of this aspect was not considered in the design process of LED street lamp lenses

Method used

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  • Method for designing asymmetric light-emitting diode (LED) street lamp based on light distribution optimization
  • Method for designing asymmetric light-emitting diode (LED) street lamp based on light distribution optimization
  • Method for designing asymmetric light-emitting diode (LED) street lamp based on light distribution optimization

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Experimental program
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Embodiment Construction

[0021] Such as figure 1 As shown, a design method of an asymmetrical LED street lamp based on light distribution optimization, the design method includes the following steps:

[0022] Step 1) Determine the basic parameters of the street composition, set various road lighting evaluation indicators, and determine its lighting standard value according to the road use function and road grade;

[0023] Step 2) Take the road surface between two adjacent light poles on a section of road as the target surface to optimize the light distribution, calculate the illuminance distribution value and brightness distribution value of each street lamp on the target surface, and pass each street lamp on the target surface Various road lighting evaluation indicators are calculated based on the illuminance distribution value and brightness distribution value above;

[0024] Step 3) Taking the standard values ​​of each lighting as the optimization condition, the energy utilization coefficient In...

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Abstract

A method for designing an asymmetric light-emitting diode (LED) street lamp based on light distribution optimization belongs to the filed of non-imaging LED lighting and solves problems of insufficient brightness uniformity, 'zebra effect' production and damage to road safety. The method comprises knowing road construction basic parameters; designing light distribution; simulating lighting and analyzing lighting standards; calculating an initial structure of a light distribution lens; carrying out optical modeling and simulation; meeting performance requirements; and finishing design. The method carries out the light distribution optimization by comprehensively considering using functions, road grades and various evaluation indexes of road lighting, meets the design standards of the road lighting, and really satisfies the requirements of city road lighting. The light distribution lens of the LED street lamp is asymmetric in road directions, the light deviates to the direction of motorways, and light energy utilization efficiency is greatly improved. Difference value optimization feedback is carried out in the design process, the light energy distribution after the light passes through the lens approaches to ideal state, and performance of the lens is improved.

Description

technical field [0001] The invention belongs to the field of non-imaging LED lighting, and relates to a design method of an asymmetrical LED street lamp based on light distribution optimization. Background technique [0002] It is the development trend of urban road lighting construction to replace traditional high-pressure sodium lamps with LEDs as the light source for road lighting. [0003] The current LED street light distribution lenses are all designed with the goal of improving the uniformity of illuminance, while ignoring the influence of brightness, glare and ambient illuminance ratio. In fact, road lighting does not only consider the uniformity of illumination. According to the relevant regulations of "Urban Road Lighting Design Standards" (CJJ 45-2006), road lighting must meet the requirements of the following parameters at the same time: average brightness of the road surface, total uniformity of road brightness , Road surface brightness longitudinal uniformity,...

Claims

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Application Information

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IPC IPC(8): F21S8/00F21V5/04F21W131/103F21Y101/02
CPCY02B20/72
Inventor 王尧刘华卢振武
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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