Bunge Lighting 1 Dynalite Lighting Control System in Tunnel Lighting Control Australia Bunge Electronics Shanghai Representative Office Tunnel Lighting Features Tunnels are the same as roads. Vehicles above 100m must have lighting and must have lighting And it must be safe and reliable to enable the vehicle to pass through at high speed. Another feature of tunnel lighting is that the driver drives into the tunnel from outside the tunnel and leaves the tunnel from the tunnel. Due to the different natural climates of the tunnel, different time There is a significant difference between the brightness and the brightness in the tunnel. This will cause the driver to visually have an unsuitable process, or a black hole or glare, which will bring great insecurities to the driving. For visual hysteresis, lighting control must be used to match the illumination brightness in the tunnel entrance and exit and the tunnel to the brightness outside the tunnel.
Usually, the human eye vision requires a longer transition time (about a few minutes) from light to dark adaptation, and a shorter transition time (about a few seconds) from dark to bright, while the driver is in a high-speed forward state of the vehicle.
Generally, tunnel lighting always divides the illumination brightness of the entire tunnel into several segments according to factors such as visual adaptation process, such as inlet section, transition section, intermediate section, and exit section. The lighting control system gives each section different brightness at different times. The control of these brightness changes according to the brightness outside the tunnel, so that the driver can visually have a transition between light and dark when driving from the tunnel outside the tunnel to adjust the certain visual lag, which is proposed for the tunnel lighting control. Some requirements.
Application of Dynalite lighting control system in tunnel lighting control Bunge Electronic Engineering Company adopts Australian Dynalite intelligent distributed lighting control system, and has set up a lighting system for Xiamen Haicang tunnel lighting. The lighting in the tunnel is divided into three. Species: enhanced lighting, basic lighting and emergency lighting. The enhanced lighting adopts high-pressure sodium lamp to be divided into day, cloud, cloudy, heavy cloudy, night and late night by means of timing and illumination compensation. The basic lighting uses dimmable fluorescent lamps for continuous stepless dimming to make the brightness uniform. The emergency lighting is synchronized with the entire lighting system. When an emergency situation occurs, the brightness of the emergency lighting is automatically switched to 100% to ensure the brightness in the tunnel. A light detection controller is installed in each of the two openings of the tunnel to detect the brightness outside the tunnel, and the brightness of the fluorescent lamp is adjusted by calculation to make a good transition between the brightness of the tunnel and the inside. The system is automatically controlled. Manual control is also provided.
As the speed of vehicles and the increase of traffic volume, tunnel lighting and its control system become more and more important, and the reliability of lighting control has become an important issue.
Features of Dynalite Tunnel Lighting Control System The Dynalite lighting control system has been further developed in tunnel control applications, which has greatly improved the safety and reliability of the tunnel lighting control system. Dynalite's lighting tunnel control system has the following features.
Dynalite lighting control system is a real distributed control system. It adopts RS485 field control bus. All the devices connected to the control bus are intelligent, can work independently and independently, and communicate between devices according to “point-to-point†mode. The work is very simple and reliable. There is no central control device in the system. The whole system will not be paralyzed due to the failure of the central control. The devices in the distributed control system will only be preset after receiving the scene command to change the brightness of the illumination. The brightness brightness scene value stored in the EEPROM is controlled by the output of the device to adjust the brightness of the illumination lamp. The data stored in the EEPROM is not lost due to power failure, thus maintaining the safety of the control value. The RS485 control bus is very simple and convenient. It is a communication cable with 4 pairs of twisted pairs. The probability of failure of the general communication cable is very low. Even if the cable is disconnected, the network is divided into two parts, but the two parts can work separately, which is controlled in the center. The system is not possible.
Dynalite can also provide a serial port device with two control buses to form a control system with two independent control bus networks, usually controlled by the first-level bus network, once the first-level bus network occurs. Fault, the system will automatically recognize and switch to the second-level bus network for control. The two buses are connected by smart bridges. This bridge has optical isolation and sequential logic operation. The bridge improves the network connection. Reliability and functionality, the first-level and second-level bus networks can communicate with each other and alternate with each other, greatly improving the reliability of the system.
The network watchdog can also be configured on the bus. The Watchdog software can be used to periodically check other devices in the system to check whether the device works online and whether the control cable connecting the device is faulty.
Dynalite has also developed a system monitoring management software that can be used for tunnel lighting control systems to detect and monitor lighting systems.
Monitor whether the air switch of the output circuit of the control device trips and trips. If a loop is open and tripped, control the lamp near the circuit to compensate the brightness; monitor the lamp current to determine whether there is a bad light, if there is a bad light, control the lamp nearby. The lamp compensates for the brightness; schedules the running time of each lamp to enable the lamps to maintain a uniform lighting time, assists in maintenance planning; monitors various activities occurring on the bus network, and records fault events (circuit open trip, bad lights, network) Faults, equipment failures, etc., to the database and automatically generate an event. Several major lighting control systems in the market. Zhou Huitao Australia Bangqi Electronic Engineering Co., Ltd. Lighting control is an automatic control concept proposed and developed abroad in recent decades. Because it is simple, practical, intuitive and effective, after entering China, Yiyi is accepted by the market. After loading communication technology and network technology in recent years, the lighting control system has a broader market application prospect.
Early lighting control systems were similar to stage lighting control systems. The setting of the stage lighting is a scene composed of many groups of lights, adapted to the environment that the stage needs to express. In practical applications, people have promoted the concept of lighting scenes and applied them to a variety of practical uses. For example, in the general sense of the banquet hall (multi-function hall), no matter how large the area, the variety of lighting types, its practical application is not more than a dozen occasions. Foreign lighting designers usually design the lighting of the banquet hall as several scenes such as conference, Chinese food, western food, buffet, and cleaning. Use the light control system to make the above scenes on-site call through the control panel, like playing back photos, to achieve the desired effect.
Digital control technology has taken a big step forward in the application of lighting control. Modern lighting automation system applications are not only high-end venues such as multi-purpose halls, banquet halls, conference rooms, etc., due to the effective improvement of monitoring capabilities, the control range is gradually expanding. As well as the longevity of the light source (at least 2 times), energy saving and many other advantages, lighting automation systems have been widely used in the following areas: indoor lighting control: office buildings, hotels, stadiums, convention centers, villas and apartments, industrial and mining Enterprises, factories, exhibition halls, museums, conference centers.
Outdoor lighting control: square, building floodlight, city night view, pedestrian street, tunnel, street lighting.
Systems such as central centralized lighting control systems (see structure diagrams) are generally more expensive, have limited lighting control capabilities, and have fatal shortcomings in which the entire system will run out of control once the central controller fails.
Systems such as the centralized lighting control system (see structure diagram) still do not solve the shortcomings of some of the central control, and it is still possible that the system partially fails.
The system of bus distributed automatic lighting control system (see structure diagram) is the most popular control system at present. Many weak current control adopts the total response, and can send E-mail to the maintenance department or have an obvious indication including audible prompts.
The monitoring management software monitors and manages the operation of the control system, thereby improving the reliability of the system and adding some auxiliary functions. However, it is not a central control software, and will not affect the entire control due to the failure of the monitoring management software itself. Normal control of the system.
In addition to the above main features, the Jynalite lighting control system also features manual/automatic operation switching and PC priority control.
The system can use a third-party optical detector to measure the brightness of the tunnel. In the control system, the minimum of two entrance brightness detectors is used. The normal operating system controls the tunnel brightness by taking the average of the two illuminometers. If there is a light detection. In the event of a fault, the system automatically adjusts the tunnel brightness with a second photometer.
Fluorescent lamps are usually used for tunnel lighting. Because the brightness of fluorescent lamps can be continuously adjusted from 0% to 100%, high-pressure sodium lamps are usually used for switching control. On the one hand, the dimming range of sodium lamps is very small, and the dimming speed is very slow. Moreover, it is necessary to avoid the power correction capacitor, so it is not suitable for dimming in tunnel illumination.
The tunnel lighting control project is still rare in China. The lighting control system of Xiamen Haicang Tunnel is also a precedent. It has been proved that Dynalite's tunnel lighting control system equipment and its system structure are successful for tunnel lighting control.
The lighting brightness scene of each section of the tunnel should be changed according to the specific conditions of the tunnel. The way the Haitang tunnel is adopted is not unique. The Dynalite tunnel lighting control system can adapt to various control methods to meet the different needs of tunnel lighting. IEI
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