Building facade dynamic solar lighting effects to achieve a kind of control method

An overview of the

the world trade center is located in chongqing jiangbei district of chongqing, a total of 62 layer, height of 262 m, is currently the tallest building in western China, is one of the landmark building of chongqing urban area. Its completion at the end of 2010 the building facade LED dynamic lighting engineering, can for the similar construction of the facade lighting control to provide a reference.

dynamic lighting effects, the world trade center in building facade Windows platform for light vehicle, use the lamps and lanterns of digitization, install lamps and lanterns of platform and Windows platform between 0. 3 m high wall facade cleaning. Cooperate with lighting control system, temperature control natural white LED lamps and lanterns in grayscale and pixels change, show the elegantly artistic ink painting, the distant mountains, such as mountainous banqiao bamboo light smoke ancient ink figure, etc. Engineering characteristics: low cost, low energy consumption, can realize dynamic effect of high artistic quality.

2 building facade

dynamic lighting system implementation process engineering specification: total area of the low light carrier ( HXW) : 262 m by 80 m low pixel spacing ( HXW) : 3. 9 m×0。 0625 m low light image resolution: 1280 x 55 low distribution: the total power of 90 kW

the basic implementation process is:

1 selection of lamps and lanterns, 16 pixels, lamps and lanterns of digital dynamic lighting function

according to the characteristics of the light vehicle, such as this case, light carrier is 0. 3 m high building facade, to light up the facade, with surface as a pixel. Consider the distance of the observer and visual resolution, choose lamps and lanterns light output Angle of 30 °, lamps and lanterns is divided into 16 segments per meter to control, and can be progressive cascade signal.

2 lighting planning and design of the control system of

to complete the target, the effect of dynamic image gray level, considering the dynamic characteristics, selection of serial shift circuit to constitute the lamps and lanterns and control system, based on the maintainability, lamps and lanterns and control system, according to the carrier floor hierarchical arrangement. Dynamic image normalization processing

3

normalization treatment, the purpose is to obtain the target graphics, according to the actual construction surface cloth lamp, determine the number, such as floors, each floor a row of lamps and lanterns, each 80 lamps and lanterns, 16 pixels each lamps and lanterns, a total of 55 layer cloth lamp. The effect of pixel and design document image overlap, generate new images, the resolution is the actual lamps and lanterns is a resolution. The process above, in the image processing software, such as Photoshop, Flash, etc. Dynamic image synthesis effect

4

after the normalization of image is a therapy combining image. Refers to a specific LED lamp. Virtual refers to the physical space is not cloth lamp wall. Synthesis, compressing, leave empty part of the entity part in Photoshop, Flash spliced into corresponding to the entity, the deformation of the image.

5 LED digital lighting engineering address mapping table

relative to the rules of the graphics changes, namely after normalizing graphics, can be a one-to-one correspondence with specific lamp, without using the address mapping table lamps and lanterns of engineering. Special graphics and lamp cannot direct rule mapping, need to use the address mapping table, lamps and lanterns of manual will coordinate with the graphical coordinates to play counterpoint. Completed in the Excel table, formation of the form by specialized software calls.

6 special multimedia playback and synthesis image map, with PC multimedia software, by special software in play, to obtain screen screenshots of the data, and output to the lighting controller the location specified. Screenshots, proprietary software will set, address mapping table data or shift.

7 lighting controller, transmission, refresh light display data

special lighting controller, video signal of the computer output in accordance with the cloth lamp lamps and lanterns, block, the branch output to the port, by each port to change lamps and lanterns is according to the shift of the signal format, multiple combination of lamps and lanterns can restore the image. Three dynamic image of LED lamps and lanterns and control system principle

1 hardware signal data flow diagram is shown in figure 1

lighting control system hardware signal data flow

2 image generation into the world trade center figure 3, figure

system control cloth lamp figure

3 system control SCS - in figure 3 5000 for the system master controller, SCS - 300 as controller, SCS - 301 for the differential signal receiver.

　　( 1) In figure 3 main controller and the maximum effective distance between points controller is 100 m, points between cascade controller maximum effective distance is 100 m, points controller and the difference between receiver maximum effective distance is 100 m, difference between receiver and lamps and lanterns, maximum effective distance of 1. 5 m。

　　( 2) System can realize the gradient, such as jump, scanning effect.

　　( 3) Poor system in each separator can control up to 24 sets of lamps and lanterns.

4 compared with big screen technology

1 carrier is large, the advantages of the project the light carrier for the entire building facade. An area of 4400 m2, the project investment cost is only one part of dozens of LED display. 2 low energy, save electricity. Compared with the traditional LED display power 350 W/m2, this project is 20 W/m2, power consumption is only one over seventeen of electricity. 3 easy to maintain, lamps and lanterns between systems, their respective do IP65 protection, and connection way, hand in hand to separate maintenance display pixels.

five summarizes the chongqing world trade center LED dynamic lighting control system, using the intensity of illumination, brightness, high and low, and the density contrast, smooth transition, provide, and create landscape and bamboo light smoke stack fold peak ancient ink effects. Already beautification environment, adjust psychology, and reflects the low carbon, energy saving, environmental protection, new ideas, is worth promoting and using for reference.