In the face of such a beautiful scenery, think tank can not help but think of the light creative ideas from who? Which company is undertaking design and construction? And is the design of Tiananmen architectural lighting the same that makes you unforgettable when you see it at the beginning of the year? Let's revisit the original design ideas together. 
â— Adjustable current slew rate, adjustable CV loop speed
â— Ultra high precision voltage & current measurement
â— OCP/OPP testing function
â— 50kHz high-speed CC/CR dynamic mode
â— 500kHz high-speed voltage and current sampling rate
â— Timing & discharging measurement for batteries
â— Short circuit test mode
â— Auto mode function provides an easy way to do complicated test
â— Dynamic frequency sweep function for determining worst case voltage peaks*
â— Non linear load mode function makes the simulated loading current more realistic*
â— Supports external analog control function*
â— V-monitor/I-monitor
â— LED load simulation function
â— Full protection: OCP, OPP, OTP, over voltage and reverse alarm
â— Up to 20 units master/slave parallel control
â— Front panel USB interface supports data import and export
â— SCPI language and standard rack size make it ideal for ATE System integration
â— Smart fan control with lower noise and better for environment
â— Multi versions to meet the cost performance and different applications
* Only professional electronic load units support these functions
Tiananmen Square is the center of Beijing and a representative of the country's image. Its status is unique. In peacetime, it is a place where people frequent sightseeing and sightseeing. It is a stage for celebrations, gatherings and performances. Designing landscape lighting for such a place is a very difficult and important thing.
1. Landscape features of Tiananmen Square
From the architectural point of view, Tiananmen Square is a space formed by the surrounding buildings. These buildings mainly include the Tiananmen Gate, the Great Hall of the People, the Monument, the Museum of Chinese Revolutionary History, and the Chairman Mao Memorial Hall. Analysis of the layout of the entire square, you can feel that it follows the design concept of the layout of Chinese classical architecture to some extent, namely: the distinctive axis sense, primary and secondary, symmetry and the courtyard layout of the statue. Analysis of individual buildings, they are typically single Chinese ancient buildings, or their architectural style contains some meaning of Chinese architecture, so the entire square has a strong Chinese style. Each building unit is a masterpiece, and at the same time, they have built a perfect square space with their respective positions and shapes.
The analysis of the shape and location of the Tiananmen Gate in the layout principle of Chinese architecture determines that it naturally becomes the main face of the square. At the same time, many auxiliary elements in front of the tower also strengthen its position as the role of the Great Hall and Museum in the square. On the left and right sides, the style of the building with a sense of balance and the grand scale influence the style of the square, forming the enveloping effect memorial hall as the end face of the square, completing the space enclosure. There are many things in common on these three enclosed façades, such as the horizontally extending glazed glazed tiles and the colonnade structure on the façade. These common points strengthen the unity of the entire square and the integrated monument is the central structure of the square. According to the elemental analysis of ancient Chinese architecture, it should be the body of the courtyard layout, which is the center of sight. Therefore, it has a controlling effect on the style and atmosphere of the whole space. In addition, some other subsidiary elements, with their own unique form and position, perfect the square enclosure and active atmosphere.
Conducting accurate building analysis and in-depth understanding of its design ideas is the basis for doing a good job in lighting design. The construction of the square light environment begins with the overall lighting plan. According to the position, function and function of the square, considering the various elements in the square, the lighting design of each unit is completed under the overall framework of the lighting plan.
2. View position of the square lighting landscape
In the design of landscape lighting, it is first necessary to confirm the position and direction of the viewing, and use this as a benchmark for lighting design. As far as the square is concerned, the situation is more complicated. Here, the audience is mobile, and there are many viewpoints and positions. Therefore, it is necessary to comprehensively consider the design in order to enjoy a good landscape image in each viewing position. . The viewing position of Tiananmen Square mainly includes: (1) on the platform of the Tiananmen Gate, watching the entire square; (2) viewing the surrounding buildings in the square; (3) Chang'an Street, watching the tower and the square during the march; (4) ) Near the front of each building, admire the architectural details; (5) View the panoramic view of the square on the high-rise buildings in the distance; (6) Aerial, overlooking the panoramic view of the square, and feel the overall momentum.
3. The environment of the square
The success of landscape lighting design is directly related to whether the design is fully considered in the environmental context. A good lighting landscape can be both eye-catching and harmonious with the environment. As far as Tiananmen Square is concerned, the surrounding environment of the building has the following characteristics:
3.1 With the development of urban night lighting, many large buildings in Beijing are equipped with facade lighting. It is well known that in facade lighting, spilled light and reflected light occupy a very high proportion of the entire illumination light. On the one hand, the surface illumination improves the average brightness level of the urban environment, and on the other hand, it also leads to a substantial increase in the brightness of the sky. According to the measurement, the brightness of the sky above the square can reach 10 cd/m2 or more on the festival night.
3.2 The road lighting around the square is gradually increasing the brightness standard , resulting in high spatial brightness and road illumination.
3.3 The Huaguang, which is set up in the square and its surroundings, is a characteristic landscape of the place . It plays an important role in creating an atmosphere. However, the all-round illuminated spherical lamps also greatly enhance the brightness of the space, and these lamps themselves become square spaces. A lot of scattered highlights.
3.4 At the large-scale evening party held on the festive night, a lot of temporary lighting, aerial spotlights and other decorative lighting should be set up. These lights enhance the strong atmosphere of the square and further enhance the brightness of the space and add more highlights. Make the square more enthusiasm.
3.5 Four high-pole lights were added to the square to make the average illumination of the ground reach 140lx, and the four dazzling lights became the brightest highlights on the square.
4. Master plan of the square light environment
The overall lighting plan should be based on the function, status and architectural characteristics of the square, taking into account the effects and influences of fixed lighting elements such as lanterns and temporary lighting on the whole, and appropriate lighting performance for each enclosed building and accessory elements. To create an overall lighting landscape that is consistent with the image of the square and has an artistic charm.
4.1 Requirements for overall lighting effects
(1) By constructing the harmonics in the illumination tones and the gradient of the illumination brightness between the buildings, the entire square is formed into an organic unity; (2) fixed lighting facilities such as Hua Deng are some bright spots on the unit. On the group, the scaled light chain is formed, so the illuminated buildings should become the background of their backdrop, so that the surrounding buildings can be arranged together, and the Hua Deng can adjust the spacious and empty square atmosphere; (3) The lighting effect of the building can regulate the colorful square elements in the festival. At the same time, the buildings become the inductive lighting landscape; (4) Enhance the commonality of the structure of the surrounding façades through illumination. For example, the horizontal lines formed by glazed tiles on the edge of each building, and the colonnade on each façade should be unified to form a common bond of the plaza; (5) highlight the lighting effect of the main surface of the square; (6) focus on shaping the center The landscape image of the structure; (7) Strengthening the balance between the east and west sides of the square.
4.2 Three states of lighting effects
At different times, the function and role of the square are different. Correspondingly, the overall lighting effect should also be different in order to form an effective atmosphere. Generally, the function of the square is divided into three situations: usual, festival and major festival. In normal times, tourists mainly visit the open squares. The main objects of the buildings are the general festivals around the square. The high-lights of the lanterns are turned on, and some temporary landscapes and lights are set in the square. People are placed in bright squares. Inside, there are more objects to watch, and the atmosphere is warm in major festivals. The plaza is a stage for celebrations and evenings. The buildings become the stage background. At this time, the two sides of the plaza are connected to each other and the two sides communicate with each other. The light environment has reached the atmosphere. The degree of intensity.
Since the squares have different functions, different building lighting effects are needed to match them in order to create a corresponding atmosphere, but from the standpoint of each building, they should always be satisfied with a consistent artistic image. People's visual psychological expectations for it, otherwise, may produce a less than solemn impression.
Considering various factors, it is decided to use the same lighting arrangement and scheme in different states to realize the transition between states by the change of illumination brightness, that is, in general, the basic facade illumination will be used. The building is finished in the festival, increasing the brightness of the facade and in-depth modeling of the building image; of course, in some ordinary days, it is also possible to selectively open some local lighting on the building, such as the national emblem of lighting, The lighting of the components such as cards and flag sculptures and the lighting on the inside of the colonnade create a new image feeling in an artistic way, and can also achieve energy-saving effects. However, as long as the lights are lit, the lighting of the building should reach the basic façade. The state of the lighting, otherwise, there will be divergence and messiness in the overall effect of the square.
4.3 Lighting tones
The buildings around the square represent the image of the country, and at the same time they play the role of gathering squares to integrate them. Therefore, the lighting of each building adopts a simple warm white tone as the basic color. In this way, it is not only beneficial to highlight the characteristics of the building itself through the change of light and shadow, but also to create a kind of elegant atmosphere. At the same time, it can effectively form effective control over the colorful scenes on the festival night square. According to the color and material of the facade of each building, the design color temperature is set as: the hall and the museum: the tower: 2500K-3000K; the monument body: 4000K; the hall and museum: 3000K; the memorial hall: 2000K.
4.4 Lighting brightness level
CIE's brightness standard for outdoor architectural landscape lighting is: 4cd/m2—6cd/m2—12cd/m2, but for Tiananmen Square, due to the bright background environment, many scattered highlights in the square, and the effect pursued by the lighting scheme Factors such as characteristics make such brightness standards unsatisfactory. Here, the selection of the reference brightness takes into account the following factors: (1) According to the status of the buildings around the square, the lighting must pursue a magnificent effect, which requires the basis of higher brightness; (2) the area of ​​the square is very Large, when people are viewing a building, the viewing distance is far away. In order to obtain the desired lighting effect, the image of the building needs to be shaped at a higher brightness level, and the amount of illumination should be at least clearly visible to the building details. The level of (3) in the bright sky and background formed by the festive lights, can clearly show the image of the building; (4) can produce a visual effect of gathering and regulating the entire square.
Combining the above factors, taking into account the brightness feeling caused by the color and material characteristics of the building facade, the design brightness of the façade of the tower is set to 40-50 cd/m2, which is used as a benchmark, according to the The brightness gradient of the building is required to determine the brightness of other buildings.
4.5 Overall brightness configuration
The lighting brightness of each building in the square should form an appropriate proportional relationship, so that the entire square can form an organic whole with center, set off, and change, and can also reflect the design concept of the layout of Chinese ancient buildings.
The monument is the central structure of the square, playing the role of controlling the overall situation. Although it has a high degree of advantage, it is slightly weaker, so it should have a prominent position in brightness.
From the perspective of the square as a whole, the tower is only one of the enclosed faces, but since it is the main face of the square and its position is important, its lighting effect should be appropriately highlighted, so the lighting brightness value is designed as four circumferences. The highest value in the face, but in terms of the characteristics and color of the facade of the tower, it is impossible to establish its position by virtue of its brightness advantage. In order to solve this problem, we have utilized the rich features of the façade structure of the city building, and carefully scribed it through lighting to create a rich landscape effect, thereby strengthening the status of the building and making full use of the front of the building. Numerous auxiliary elements, through the appropriate lighting performance of these elements, form a backdrop to the tower, further strengthening the effect of the tower.
The halls and museums are the enclosed faces on both sides of the square. According to the ranking of the buildings in the layout of Chinese ancient buildings, the illumination brightness should be weaker to form the primary and secondary differences.
The location of the memorial hall makes it a terminal enclosure. At the main point of view, it becomes the lining of the monument, so it should be the weakest one of the enclosures, and should also be distinguished from the monument in the illumination tones so that Form the most effective setting against the central structure.
In the four enclosed faces, a difference of brightness of 20% is formed, and the brightness of the central structure is at least twice the brightness of the reference. In summary, the brightness ratio of each building is: Monument: Tiananmen Gate: City Hall: Museum: The Chairman Mao Memorial Hall is 2:1:0.8:0.8:0.6.
5. Lighting performance and image shaping of single building
In order to complete the overall lighting planning of the square and the image of each building, the following lighting performance measures are required:
5.1 Lighting of Tiananmen Tower
(1) The roof ridge and the double æª è®¾ç½® 设置 设置 设置 设置 设置 设置 设置 设置 设置 设置 设置 设置 设置 设置 设置 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 轮廓 屋顶 屋顶 屋顶 屋顶 屋顶 屋顶 屋顶 屋顶 屋顶(4) Improve the inner light transmission brightness of the colonnade, and express the texture texture of the door pane fan; (5) shape the railing with the higher color temperature; (6) the stage lighting should highlight its volume sense; (7) The lighting of the auxiliary elements in front of the tower is the main purpose of blessing the image of the tower and perfecting the square enclosure; (8) Jinshuiqiao lighting to strengthen the connection between the tower and the square.
5.2 Illumination of the Monument to the People's Heroes
(1) Enhance the core position of the monument in the square with high-brightness illumination; (2) Control the proportion of light used in different parts of the tablet to shape its three-dimensional sense and height sense; (3) The illumination color and the surrounding surface are formed. (4) The illumination hue of the two-story pedestal railing is moderately contrasted to form the natural connection between the stele body and the square; (5) controlling the projection angle and the proportion of light used to fully express the texture and solidity of the bas-relief Sense; (6) Carefully construct the top of the monument to enhance the artistic expression of the top and the ridge.
5.3 Lighting of the Great Hall of the People
(1) The whole building uses the same color illumination to strengthen its huge sense of scale and volume, and build a magnificent momentum on the landscape; (2) Improve the illumination brightness on the colonnade and the front projections at both ends of the building, inside the wings on both sides The reduced part reduces the illumination brightness and highlights the layer change; (3) the large step under the middle colonnade is illuminated with scattered light to strengthen the position of the middle section; (4) the brightness of the inside of the colonnade is strengthened to form an internal light transmission effect; (5) Contour lighting is provided at the top of the cornice to enhance the horizontal lines; (6) The façades on the top of the building are properly illuminated to enrich the façade level.
5.4 Lighting of the Museum of Chinese Revolution and History
(1) Emphasizing the volume, scale and grand scale of the building with the same-tone illumination as the whole; (2) Emphasizing the symmetry of the lighting effect of the two wings of the building and highlighting the lighting effect of the middle section; (3) Strengthening the middle corridor two The illumination of the side sill and the top flag sculpture forms a bright frame-shaped composition to introduce the viewer's line of sight into the inner court; (4) to strengthen the lighting effect of shaping the inner façade of the inner chamber to form an inner light-transmissive feeling; (5) to outline The illumination emphasizes the horizontal lines of the top cornice.
5.5 Lighting of Chairman Mao Memorial Hall
(1) Effectively set off the monument in the lighting tones; (2) Enhance the illumination on the inside of the colonnade; (3) Emphasize the horizontal lines of the two passes with contour illumination; (4) Convex facade illumination on the upper part of the building, The light and dark changes in the horizontal direction should be formed to produce a sense of rhythm that echoes the underlying colonnade.
Through the effective implementation of these measures, the lighting landscape image of each individual building is well shaped, and the planning goal of the overall light environment of the square is realized. After the completion of the project, the use of the National Day party of the 50th anniversary of the founding of the People's Republic of China achieved an ideal lighting effect.
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â— Provides four kinds of basic working mode such as CV/CC/CR/CP, and CV+CC/CV+CR/CR+CC complex operating modesâ— Adjustable current slew rate, adjustable CV loop speed
â— Ultra high precision voltage & current measurement
â— OCP/OPP testing function
â— 50kHz high-speed CC/CR dynamic mode
â— 500kHz high-speed voltage and current sampling rate
â— Timing & discharging measurement for batteries
â— Short circuit test mode
â— Auto mode function provides an easy way to do complicated test
â— Dynamic frequency sweep function for determining worst case voltage peaks*
â— Non linear load mode function makes the simulated loading current more realistic*
â— Supports external analog control function*
â— V-monitor/I-monitor
â— LED load simulation function
â— Full protection: OCP, OPP, OTP, over voltage and reverse alarm
â— Up to 20 units master/slave parallel control
â— Front panel USB interface supports data import and export
â— SCPI language and standard rack size make it ideal for ATE System integration
â— Smart fan control with lower noise and better for environment
â— Multi versions to meet the cost performance and different applications
* Only professional electronic load units support these functions
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