Nantong Boxin Electronic Technology Co., Ltd. , https://www.ntbosen.com
Yesterday morning, the reporter followed the relevant person in charge of the China Railway Tunnel Co., Ltd. and walked into the Yangtze River Tunnel from the C-channel on Wuchang Friendship Avenue. On both sides of the ramp entrance, workers are installing marble trim panels. When the vehicle enters the tunnel from outside the tunnel, the light is dimmed from light to dark. The lighting design of the tunnel entrance is very particular. It should not be too bright or too dark. Otherwise, the driver's eyes can't adapt and it is easy to get out of traffic accidents. The person in charge introduced the reporter.
In order to solve this problem, the tunnel entrance lighting is designed in three stages: In the first stage, the shovel is set up with a tens of meters long sun shed, which is naturally lit, but the light is weaker than the road crossing. In the second stage, the basic lighting is additionally reinforced with an installation length of about 90 to 100 meters. The basic lighting fixtures are ordinary fluorescent lamps, which are located above the basic lighting fixtures and use high-pressure sodium lamps to emit yellow light. The third phase transitions to normal lighting in the tunnel, with only basic lighting fixtures installed. The light in these three stages is gradually decreasing, and the driver's eyes can gradually adapt to the light changes in the hole.
Basic lighting fixtures and reinforced luminaires were also installed at the tunnel exit, but the installation length was shorter than the entrance, about seventy-eight or eight meters long, in order to make the transition, so that the driver's eyes gradually adapted to the glare outside the cave.
The Yangtze River Tunnel is 3 kilometers long and has installed more than 7,600 lamps. Most of them belong to basic lighting fixtures. According to the light changes in the tunnel, there are three ways to open these basic lights: one for each of the six lamps, the first for opening only three, the second for only two, and the third for only Open one of them. The last one belongs to emergency lighting. The power supply of this luminaire is different from other 5 ,, and the rechargeable battery is used to ensure 24 hours a day. This means that even in the event of a sudden power outage, there is still light in the tunnel and it will not be dark.
The Yangtze River Tunnel is highly intelligent. The tunnel is equipped with a visibility sensor. The computer control system automatically adjusts the intensity of the light.
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