Detailed implementation of the National Stadium night lighting scheme

In this process, we found such a coincidence that the overall effect of the nest is composed of three main colors of red, white and yellow, showing three major parts: red wall, steel structure and membrane structure. The composition of the LED light source in the red wall is also composed of three different chips of red, white and yellow, which precisely restores the color of the red wall, thus the red, white and yellow form the complete night of the nest. Color system. The two scenes of white light and yellow light in the steel structure and the membrane structure are realized by a metal halide lamp and a sodium lamp, respectively, and are not described herein.

The LED luminaires in the red wall section show good color reproduction, sufficient illuminance and proper uniformity for this part, but it is still far from enough. In the appropriate period, the red wall part can show: breathing, heartbeat, rising, The main scene of five dynamic performances, such as rotation and running.

Breathing and heartbeat are realized by the whole light and dark changes of the red wall. The darkening process begins to darken. The darkening process indicates inhalation. When it drops to the remaining 30% brightness, it begins to brighten. The brightening process means exhalation. After a short stay and then cycle performance in full light state, the overall speed is best set by debugging to a state that is slightly slower than normal breathing. Through the breathing scenes, the scenes of nature and the leisurely state of life are displayed, and the life characteristics of the nest are also displayed. Breathing scenes can be used in scenes such as usual nighttime performances or two hours before the game.

The heartbeat changes in light similar to breathing, but the speed is faster, the change is more obvious, and the brightness starts to brighten when the brightness drops to 20%. Each time the heartbeat has two changes in brightness, it is compact, maximizing the two different degrees of normal human heartbeat. The peak state. The heartbeat scene fully demonstrates the passion of the game, and it is associated with the classic scene of the game, which fully explains the atmosphere of the venue. The heartbeat scene is suitable for setting during the major competition period; some specific scenes during the opening and closing stages of the important event.

The raised scene is completed by the red wall of different layers. The performance starts from the dark state. The light on the first floor is slowly lit. When the brightness reaches 30%, the second layer of light starts to light up, and the brightness of the first layer continues to increase until the brightness of the layer continues to increase. 100%, and so on until the 7th floor lights are all on.

The rotating scene is formed by the cooperation of the upper, lower, left and right lamps. The scene starts from the full-light state and rotates counterclockwise along the facade of the building. The speed is slow and elegant, and the light and dark alternate without borders. It seems to have become dark and bright, and everything happens unconsciously. Like a huge cylinder that accumulates endless red energy, it is ready to go, and it is like a red warrior carrying a skillful Tai Chi in the setting sun. This scene shows fantastic effects and is randomly set with other effects.

The rotating scene is formed by the cooperation of the upper, lower, left and right lamps. The scene starts from the full-light state and rotates counterclockwise along the facade of the building. The speed is slow and elegant, and the light and dark alternate without borders. It seems to have become dark and bright, and everything happens unconsciously. Like a huge cylinder that accumulates endless red energy, it is ready to go, and it is like a red warrior carrying a skillful Tai Chi in the setting sun. This scene shows fantastic effects and is randomly set with other effects.

The running scene visually shows the scene of the most sporty representative running track. In the dark scene, the different natural layers of the red wall surface appear as meteor-like light effects appearing quickly and in a step-by-step arrangement. It is like preparing a full athlete to enter the starting point of his own track with confidence and eager to try. They then ran on their respective runways after firing the guns.

This scene is achieved by realizing a horizontal shading change in a single layer 25 meters wide, and the longitudinal positions of the different layers are appropriately staggered to form a chasing effect. The most active scenes in the fifteen main scenes of this scene show a cheerful and intense atmosphere. Suitable for show during competitions and events.

In addition to the above five home scenes, the LED system can also display other more dynamic scene subjects. For example, the image of the Great Wall Mouth is formed by different layers of light and dark; the simple geometric shape: strip or block is used for different speeds of running; the random light and dark changes are compared to simulate the effect of flame burning; the gradient effect is formed by different distances in the lateral direction and different The rate runs and so on.

These scenes are not suitable for the display of architectural forms under certain circumstances, but as time goes on, the additional functions of the Bird's Nest will be more and more developed, and the activities in the venue will be diverse. I believe these scenes will also be appropriate. It has its own use, and will develop and debug more colorful dynamic scenes on this basis.

The use of the Bird's Nest LED is not always smooth. LEDs are not the best choice when there is no dynamic effect requirement at first. Mainly in the restoration of red color. The wavelength of the LED light source is relatively simple. We hope to obtain a red light wavelength of about 600 nm, and the common red light wavelength at the market is 625 nm, and preliminary exploration: under the pure red LED illumination, the red color is too bright and lacks softness. So after the initial exploration, the LED was abandoned as the illumination source for the red wall.

The use of the Bird's Nest LED is not always smooth. LED is not the best choice when there is no dynamic effect requirement at first. Mainly in the restoration of red color. The wavelength of the LED light source is relatively simple. We hope to obtain a red light wavelength of about 600 nm, and the common red light wavelength at the market is 625 nm, and preliminary exploration: under the pure red LED illumination, the red color is too bright and lacks softness. So after the initial exploration, the LED was abandoned as the illumination source for the red wall.

The use of the Bird's Nest LED is not always smooth. LEDs are not the best choice when there is no dynamic effect requirement at first. Mainly in the restoration of red color. The wavelength of the LED light source is relatively simple. We hope to obtain a red light wavelength of about 600 nm, and the common red light wavelength at the market is 625 nm, and the red color is too bright and lacks softness under the illumination of pure red light. So after the initial exploration, the LED was abandoned as the illumination source for the red wall.

Subsequently, the red metal halide lamp, the white light different color temperature metal halide lamp, and the different color fluorescent lamps were tested and compared, and finally the red fluorescent lamp showed the color performance in the performance of the red wall, and the illumination, brightness and uniformity all had good performances. This is tentatively designated as a fluorescent light to represent the red wall. At this time, the requirements of the dynamic effect have been initially proposed, so we used a digital dimming ballast on the basis of fluorescent lamps to achieve a simple dynamic effect.

However, as the requirements for dynamic effects increase, the dimming speed of fluorescent lamps is slow, and the life of the light source is short, we have to consider completely replacing the light source and the lamps. The LEDs are also returning to our sights until the end. Success.

In the re-experiment of LED, we conclude that red light does not appear to be saturated enough under the projection of white light. It appears stiff and too bright under the illumination of pure red light, and is fused with the surrounding environment. White light and red light are added together. Can be more pure red, but the color is too cold;

After several tests, the red, white and yellow light were blended according to the ratio of 4:3:3, red 630nm amber 585nm warm white 2800K, lamp color coordinates (center default) CIE: 1931X: 0.560, Y: 0.370. The wall is made of warm red color, which is consistent with the color of our most common red lanterns. It is festive and has a strong Chinese character. The control system also allows for a stepless gradient between pure red and orange. And the dynamic performance is flexible, so that the red wall part of the Bird's Nest has powerful hardware support for dynamic effects display.

Display system carrier characteristics

The dynamic effect needs to be attached to the carrier installed by the lamp. The structural features of the red wall part of the bird's nest are generally regular. The layer is from the first floor to the fifth floor. The height of the floor is about 4.2 meters. The five floors are due to the north-south direction of the bowl-shaped structure of the stadium. The middle is concave, so there is no need to form a circular shape around the circumference.

The six or more floors are the back wall of the seat of the highest level spectator, the east and west are arched in the middle, the back wall is red, and the one-to-five-layer core tube red wall is integrated. The lowest part of the red wall is about 4.2 meters, the highest. At about 18 meters, this part is lighted up and down, and a light strip is added in the middle to refill the light to ensure the uniformity of the overall brightness.

From this point of view, the vertical part of the red wall of the bird's nest is originally six layers of natural layer. The fill light adds one layer to the whole longitudinal direction with up to 7 pixel points for performance; the horizontal direction is freely controlled as a pixel point every 1.2 meters. In the east and west façades, there are seven pixel points in a large area, so that a relatively complicated figure can be expressed. In the red wall portion of the north and south façades, there are only four pixel points in the longitudinal direction, so that only a simple light and dark change effect can be seen.

(North and South facades)

The control system adopts the technology of real-time mapping of video data, and directly transmits the lighting effect data produced by the computer to the corresponding spatially distributed lamp controller through the optical fiber and the CAT5 line, thereby realizing real-time dynamic lighting effects.

The arrangement of the on-site lamps is twisted along the structure of the core tube. In order to maximize the control and display dynamic effects, the lamps must be in the form of independent address codes. Each lamp has an independent address code and corresponds to the unique position on the site, although When installing, it is necessary to select the luminaire according to the set order and position, which causes some inconvenience to the construction, but it is suitable for the complex space unique to the bird's nest, and avoids the correlation effect after the local fault occurs. This set of modes should be the most suitable control. System form. The control protocol is MX512; the interface format is three-wire, bus type;

At the same time, in order to ensure the minimum requirements of the lighting effect: "all bright state", we set the initial data of the lamp to be 100% light, that is to say, when the normal dynamic command is not received, the lamp can be stabilized as long as it is normally powered. Full light state. Increase the insurance factor for the overall effect.