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Tunnel entrance sunshade gradually-changing luminous environment design method

A design method and awning technology, applied in the direction of design optimization/simulation, calculation, special data processing application, etc., to achieve the effect of smooth light intensity change curve, ensuring driving safety, and simple operation

Inactive Publication Date: 2017-06-20
CHANGAN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for designing the gradient light environment of the sunshade at the entrance of the tunnel, so as to overcome the deficiencies of the existing design methods of the sunshade and to ensure the driving safety of the tunnel entrance more effectively.

Method used

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  • Tunnel entrance sunshade gradually-changing luminous environment design method
  • Tunnel entrance sunshade gradually-changing luminous environment design method
  • Tunnel entrance sunshade gradually-changing luminous environment design method

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Embodiment Construction

[0037] Following knot and accompanying drawing further illustrate the present invention:

[0038] A method for designing a gradient light environment for a sunshade at a tunnel entrance, comprising the following steps:

[0039] Step 1: Determine the length L of the awning c :

[0040]

[0041] Among them, v is the design vehicle speed;

[0042] t is the dark adaptation time at the driver's tunnel entrance;

[0043] The calculation process of the dark adaptation time t at the entrance of the driver’s tunnel is as follows:

[0044] The annual maximum solar irradiance in the area where the tunnel is located L max , the average luminance L(S) in the driver's field of view of the tunnel, the luminance reduction factor of the entrance section of the tunnel is k, and the luminance L of the tunnel entrance section is obtained th1 :

[0045] L th1 =k×L(S) (2)

[0046] Dark adaptation time of drivers at the tunnel entrance

[0047]

[0048] where L in The actual measured...

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Abstract

The invention discloses a tunnel entrance sunshade gradually-changing luminous environment design method. The method comprises the following steps: step 1, determining length Lc of a sunshade; step 2, according to the shape and size of a section of a tunnel portal, and the preliminarily determined length Lc of the sunshade, establishing a tunnel and sunshade model in CAD; step 3, importing the tunnel and sunshade model to Ecotect Analysis software for luminous environment simulation, through determining combination of shading plates in different light transmittance, luminous environment gradual change in the sunshade satisfying driver vision dark adaptation requirement on a tunnel entrance, and correcting total length of the sunshade. The method is simple in operation, and accurate and reliable in result.

Description

technical field [0001] The invention belongs to the field of road tunnel traffic safety facilities, in particular to a method for designing a gradient light environment of a sunshade at a tunnel entrance. Background technique [0002] With the development of highway tunnel construction in our country, people pay more and more attention to the traffic safety at the tunnel entrance. Studies have shown that the large difference in illuminance inside and outside the tunnel entrance is the main cause of traffic accidents at the tunnel entrance. Therefore, it is very necessary to install a certain length of light-reducing components at the entrance of the tunnel to realize a reasonable transition of the illuminance difference inside and outside the tunnel entrance. [0003] At present, there are two main directions of domestic research on light-reducing components at tunnel entrances: one is a sunshade that changes the light transmittance by changing the spacing between beams and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 彭余华李俊锋唐鹏飞杨可
Owner CHANGAN UNIV
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