Changzhou building lighting adopts one-button intelligent control system
The reporter learned from the Lighting Office of the Municipal Urban Management Bureau that up to now, the outdoor landscape lighting of nearly 200 buildings in various urban areas of the city has been included in the unified city landscape lighting and lighting monitoring system, realizing the “one-button control†of urban night lighting.
On the 22nd floor of the Jingu Building opposite the Zhongtian Gymnasium, there is a more than 10 square meters office. This is the control room for the city night landscape lighting. The wall of the office is the projector that displays the scenery of the city. The building location map of the lighting system, the staff operates the computer, and observes the real-time situation of the landscape lighting through the camera mounted on the top of the building.
The urban landscape lighting and lighting monitoring system is to centralize the “control right†of implementing the outdoor night lighting of the building into the computer system of the control room, to start or turn off the lighting through the program, and also to remotely install the telecom building and the Taifu Plaza. 2 wireless video monitors, observe the light or darkness of the light or damage, and find out the situation in time.
According to reports, after the use of the monitoring system, the urban lighting management mode has been changed from the traditional "patrol system" to the "value system", which solves the problem that the lighting of each building has to be guarded in the past, greatly reducing the workload. The real-time performance of the monitoring system shortens the discovery time and maintenance cycle of the fault, and changes the passive management to active management.
By monitoring the system software, you can control the opening and closing of building lighting at any time. It can be quickly turned on for special events or major festivals. It can be illuminated for 3-5 hours every day on Fridays and Saturdays to meet the diversity and flexibility of urban night lighting. At the same time, through the automatic patrol (every time) alarm and patrol, the building can be found in time on the electronic map and immediately notify the control personnel to repair, the facility can be found in time. At the same time, through the scalability and compatibility of the system, other departments can easily share the system resources.
According to reports, since the implementation of the urban landscape lighting and lighting monitoring system in 2003, the city has grown from more than 10 buildings in the year to nearly 200 buildings, and with the acceleration of urban construction, there will be more building landscape lighting. Enter the system to create the splendour and prosperity of the urban night scene. At the same time, all the lamps use LED energy-saving lamps to achieve low energy consumption while lighting the city.
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Response time refers to the response speed of the Liquid Crystal Display to the input signal, that is, the response time of the liquid crystal from dark to bright or from bright to dark (the time for the brightness from 10%-->90% or 90%-->10%) , Usually in milliseconds (ms). To make this clear, we have to start with the human eye's perception of dynamic images. There is a phenomenon of "visual residue" in the human eye, and the high-speed motion picture will form a short-term impression in the human brain. Animations, movies, etc. to the latest games have applied the principle of visual residue, allowing a series of gradual images to be displayed in rapid succession in front of people's eyes to form dynamic images. The acceptable display speed of the picture is generally 24 frames per second, which is the origin of the movie playback speed of 24 frames per second. If the display speed is lower than this standard, people will obviously feel the picture pause and discomfort. Calculated according to this index, the display time of each picture needs to be less than 40ms. In this way, for the liquid crystal display, the response time of 40ms becomes a hurdle, and the display above 40ms will have obvious picture flicker, which makes people feel dizzy. If you want the image screen to reach the level of non-flicker, it is best to achieve a speed of 60 frames per second.
I used a very simple formula to calculate the number of frames per second under the corresponding response time as follows:
Response time 30ms=1/0.030=approximately 33 frames per second
Response time 25ms=1/0.025=approximately 40 frames per second
Response time 16ms=1/0.016=approximately 63 frames per second
Response time 12ms=1/0.012=approximately 83 frames of pictures displayed per second
Response time 8ms=1/0.008=approximately 125 frames per second
Response time 4ms=1/0.004=approximately 250 frames per second
Response time 3ms=1/0.003=approximately display 333 frames per second
Response time 2ms=1/0.002=approximately 500 frames per second
Response time 1ms=1/0.001=approximately 1000 frames per second
Tip: Through the above content, we understand the relationship between response time and the number of frames. From this, the response time is as short as possible. At that time, when the LCD market first started, the lowest acceptable range of response time was 35ms, mainly products represented by EIZO. Later, BenQ's FP series came out to 25ms. From 33 to 40 frames, it was basically undetectable, and it was really quality. The change is 16ms, displaying 63 frames per second to meet the requirements of movies and general games, so 16ms is not obsolete. With the improvement of panel technology, BenQ and ViewSonic started a speed battle. ViewSonic started from 8ms to 4ms. Released to 1ms, it can be said that 1ms is the final controversy of LCD speed. For game enthusiasts, 1ms faster means that CS's marksmanship will be more accurate, at least psychologically, such customers should recommend the VX series of monitors. But everyone should pay attention to the grayscale response when selling. The text difference in full-color response may sometimes mean the same thing as gray-scale 8ms and full-color 5ms. It is the same as when we sold CRTs before, we said that the dot pitch is .28, LG just I have to say that he is .21, but the horizontal dot pitch is ignored. In fact, the two are talking about the same thing. LG has come up with a sharpness of 1600:1. This is also a conceptual hype. Everyone uses the basic screen. There are only a few companies on the list, and how can only the LG family achieve 1600:1, and everyone stays at the level of 450:1? When it comes to consumers, the meaning of sharpness and contrast is obvious, just like AMD's PR value, which has no real meaning.
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