A heavy snow in Beijing has attracted countless friends in Beijing to compete in the snow, and it is really "the beautiful city, the silver is wrapped up, the picturesque, the snow is flying, the beautiful is not square", people are very happy, unhappy However, there are even more people who write such a sentence - "You are in the sun in the south, snow is falling; I am in the cold night in the north, the seasons are like spring." The southern citizens have envy and hate.
However, in this case, this winter is coming, no matter the north and the south, many problems should be paid attention to, such as tunnel lighting in the road. If the lighting design is unreasonable, it is easy to cause uncomfortable, dark and depressed feelings, posing a safety hazard. .
"Black Hole Effect" and "White Hole Effect" of Tunnel Visual Phenomenon
Closer to home, I believe many people have encountered the following phenomenon: when the car approaches a long tunnel entrance, the brightness of the sky, open-air pavement, and nearby buildings in the driver's field of vision is much higher than the brightness of the tunnel entrance, although the actual The upper hole also has considerable brightness, but the driver still feels that the hole is very dark, like a "black hole", so that the situation near the hole can not be identified. This phenomenon is called "black hole effect." On the contrary, the "white hole effect" is the transition from the darker environment in the tunnel to the brighter environment outside the tunnel. The strong glare felt and the situation outside the tunnel cannot be immediately seen.
These phenomena are related to the photoreceptor cells of the human eye, pyramidal cells and rod cells. In order to make the human eye enter the tunnel and the tunnel clear, so that the driver of the motor vehicle feels psychological and visual comfort, it requires a good transition and connection between the brightness in the tunnel and the natural light outside the tunnel, using human vision. The characteristic design is to adjust the tunnel brightness adjustment mode of the human eye adaptation curve.
Lighting equipment is usually required for tunnel lengths greater than 100 m. Tunnel lighting is a functional lighting designed to ensure smooth traffic in the tunnel. The purpose of the lighting is to provide the driver with a safe and comfortable visual environment during the tunnel driving to ensure traffic operation and improve transportation efficiency.
Intelligent control can meet the requirements of tunnel lighting
Since the tunnel has a semi-enclosed space, it requires high reliability and stability; the management area is large, ranging from one kilometer to more than one hundred kilometers; the number of lighting nodes is generally thousands or even tens of thousands; construction installation and maintenance Difficult, high cost; need centralized control; need 24h uninterrupted lighting, etc. Therefore, it is much more complicated than other lighting in driving visual characteristics. Based on the above points, the tunnel owner and design, operation, maintenance and other units are The need for intelligent control of lighting:
1. In order to achieve the purpose of eliminating the white hole and black hole effect, the driver can have a good visual transition at the entrance and exit of the tunnel. The tunnel lighting should adopt sectional lighting: population segment, transition segment, intermediate segment and exit segment. And the lighting level requirements of each lighting segment are different. Therefore, it is necessary to perform on-demand dimming of the lamps for the enhanced segment lighting;
2. The intelligent lighting control system can calculate the astronomical clock according to the latitude and longitude of the installation area of ​​the lamp, and dim and control the lamp according to the time period, weather, traffic flow or other requirements, thereby achieving the purpose of energy saving, consumption and comfort;
3, can easily and quickly control all lighting fixtures on the computer or electronic equipment, using the same platform for centralized management, improve management efficiency;
4. The working status of all lamps can be mastered quickly and in real time. The controller should establish various security strategies to timely alarm the abnormal state to achieve the purpose of improving safety and reducing maintenance costs.
5. The system stores the power data and energy consumption information for a long time, and the query is convenient. The user is familiar with the faults and replacement of the power consumption and lighting facilities, and can adapt to the operation of large projects and long-term management;
6, it is best to support a variety of control modes such as automatic dimming and time-controlled dimming, built-in different scene modes, making tunnel lighting a beautiful landscape of the city.
Introduction to common intelligent control schemes for tunnel lighting
The advanced lighting control method is an important skill for reasonable energy saving in the case of ensuring visual conditions and meeting tunnel lighting requirements. The wireless lighting control system is an intelligent control scheme that has received much attention in recent years. Its advantage is that it does not need to lay control lines; the communication rate can reach 250Kbps; the installation position of the area controller can be arbitrarily specified, and the required number is small.
The above picture shows the wireless lighting control project of a tunnel in Anhui Province completed by Shunzhou Technology not long ago, which satisfies the above requirements. It is reported that this set of wireless lighting control system solutions of Shunzhou adopts advanced ZigBee technology and uses traditional single-lamp controllers to control, collect and judge Street Lamp faults. It can automatically adjust according to collected traffic flow information and illuminance values. Light. The tunnel in which the system is installed, because the lighting can adjust the brightness according to the actual changes, provides the driver with the best view, and achieves maximum energy saving while ensuring driving safety.
The control system can also be built with different scene modes, preset multiple lighting scenes and automatically switch to truly realize intelligent management.
Specifically, the system has a built-in single-lamp controller and a warp-latitude space-time module, and is equipped with a vehicle detection sensor. The centralized manager, single-lamp controller, vehicle detection sensor and other devices rely on radio frequency wireless connection to transmit digital signals. Through the commands issued by the service center, the relevant commands are executed, and the voltage, current, power factor, lighting rate, energy consumption, etc. of the light source can be detected and uploaded to the service center to realize intelligent control and energy saving. The collected data is uploaded to the monitoring software through GPRS or the network from time to time, and combined with the GIS geographic information system, the inspection of the lamps is realized, and the operation cost is saved.
　 SZ10-TA products
Functional description
1. Vehicle quantity detection: automatically adjust the illumination brightness according to the traffic flow to reduce the lighting energy consumption;
2. Illumination detection: adjust the brightness of the exit section, the entrance section, the transition section inside the tunnel and the tunnel according to the illumination inside and outside the tunnel;
3. Monitoring alarms: lamps, current, voltage, power, etc.
4. Report function: single lamp historical data, fault alarm report, lighting rate, etc.
5. Operational data analysis: voltage, current analysis of branches, equipment, and lines
6. Abnormal intelligence statistics: lamp failure, terminal failure, communication failure
7. Mobile inspection: support IE monitoring, mobile APP monitoring
8. Terminal operation status monitoring: online, offline, fault status
With a deep understanding and experience of wireless technology, Shunzhou Technology has launched a wireless lighting control system that has been tested by the market and has been recognized by many customers.
"Made in China 2025" pointed out in the "in-depth integration of informationization and industrialization", accelerate the development of intelligent manufacturing equipment and products, coordinate the layout and promote the development and industrialization of products such as intelligent lighting appliances. Intelligent control systems are gradually and increasingly introduced into tunnel and road management systems, reflecting tremendous energy savings and significant cost advantages, which will help tunnels and road operations achieve real safety and efficiency. Energy saving and low consumption bring huge social and economic benefits.
Edit: bober
Traffic Lights are traffic lights that command traffic and are generally made up of red lights,green lights and yellow lights.The red light means no traffic,the green light is allowed to pass,and the yellow light is a warning.
Traffic lights are divided into:light motor vehicles, no-motor vehicles lights,pedestrian signal lights,direction indicator lamp(arrow lights),driveway lights,flashing warning lights,road and rail light plane crossing.
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