Hubei Institute of Electronic Science, Yue Rui (Deputy Director, Senior Engineer)
Guangzhou Hedong Electronics Co., Ltd. Zhong Linfeng
Foreword
The Wuhan Second Yangtze River Bridge is located 6.8 kilometers downstream of the Wuhan Yangtze River Bridge and was completed and opened to traffic on June 18, 1995. The total length of the bridge is 4,678 meters, the main bridge is 1877 meters, the main span is 400 meters, the bridge deck width is 26.5 meters to 33.5 meters, and the daily traffic capacity is 50,000 vehicles. The navigation clearance under the bridge is 24 meters, which is a double-tower double-span prestressed reinforced concrete cable-stayed bridge. Its main span and bridge deck width rank first among the same types of bridges built in Asia and China; as the main span of cable-stayed bridges, it is also among the best in the world's built bridges of the same type. A bridge of age and style. The completion of the Second Yangtze River Bridge in Wuhan has enabled the entire inner ring of the three towns of Wuhan to penetrate, which has effectively promoted the development of Wuhan's economic construction.
The Wuhan Second Yangtze River Bridge is located 6.8 kilometers downstream of the Wuhan Yangtze River Bridge and was completed and opened to traffic on June 18, 1995. The total length of the bridge is 4,678 meters, the main bridge is 1877 meters, the main span is 400 meters, the bridge deck width is 26.5 meters to 33.5 meters, and the daily traffic capacity is 50,000 vehicles. The navigation clearance under the bridge is 24 meters, which is a double-tower double-span prestressed reinforced concrete cable-stayed bridge. Its main span and bridge deck width rank first among the same types of bridges built in Asia and China; as the main span of cable-stayed bridges, it is also among the best in the world's built bridges of the same type. A bridge of age and style. The completion of the Second Yangtze River Bridge in Wuhan has enabled the entire inner ring of the three towns of Wuhan to penetrate, which has effectively promoted the development of Wuhan's economic construction.
First, the design background and current situation
The Wuhan Yangtze River Second Bridge has built a monitoring information management system. There is a monitoring room in the lower bridge of the Hanqi Erqi Road, including the TV monitoring, security alarm, bridge health monitoring, internal program control and other subsystems. The system, together with the fiber-optic/microwave-dedicated computer network between the already-established management center and the bridges, is playing an irreplaceable role in the modern management of bridges.
The Yangtze River Second Bridge lighting and related power supply and distribution system expansion and transformation, increase the corresponding lighting and power supply and distribution monitoring and management system content. Under the principle of comprehensive consideration of various technical advantages, the intelligent lighting control system and the power supply and distribution monitoring system adopt the HDL-BUS intelligent environment art lighting control system developed and produced by Guangzhou Hedong Electronics Co., Ltd.
The electromechanical and lighting renovation project of the second bridge will highlight its far-reaching significance from the following aspects:
With the current second bridge network electronic information system to provide a good foundation for the project, in the case of a small investment, to achieve more comprehensive bridge information management including power, lighting. Realize the unattended operation of the 0# pier and 16# pier for the motor room, and apply the human resources to places where it is more needed. The system's control of landscape lighting, especially the control of guardrail LED lights, can create more colorful effects and leave enough room for future brightening expansion and effect upgrade. The lighting circuit and the power circuit monitoring have commonality, and the design requires the monitoring room background monitoring software and server integration to be unified.
Second, design principles and requirements
1 , design principles
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For the second bridge integrated automation control system, we have established the design goal of “safe and reliable, advanced technology, reasonable economy, high degree of automation, convenient maintenance and managementâ€, and provide advanced technical means to ensure the safe operation of the bridge.
Advancement: The system design adopts advanced technology and has proven mature and reliable technology. In the next few years, the technology will continue to lead, and with the development of science and technology, it will continue to upgrade, and strive to integrate the automation system with the modern bridge. adapt;
Reliability: Ensure that the system operates reliably during its life cycle;
Standardization and modularization: All designs comply with relevant international standards, national standards or ministerial standards. All software and hardware designs are modularized to facilitate system expansion, operation, maintenance and upgrades;
Scalability: As the demand for modern management grows, ensure that the system has sufficient scalability;
Practicality: After ensuring the investment of the integrated automation system of the bridge, it can solve the main problems in the management of modern special bridges, improve the level of automation, and improve economic and social benefits;
Economic rationality: the system has high performance-price ratio and lowest life cycle cost;
Ease of use and maintainability: the system is easy to use, friendly man-machine interface and easy to maintain;
Flexibility and openness: The system is flexible enough to meet a wide range of special needs, and openness guarantees interface with smart devices from a variety of other vendors;
Safety: Ensure that the system operates safely and reliably, and prevent human error and external interference from affecting the safety of the system.
2 , design requirements
In addition to the conventional program design principles, the design of the program is based on the specific requirements of the second bridge for the intelligent control system, paying particular attention to the following details:
Strictly follow the technical requirements to determine the technical solution, select the hardware system and control software that fully meet the requirements, and carry out secondary development of the software functions as required.
According to the construction of the existing network information system, ensure that the resources of the existing network system are used as much as possible, and the new control system is integrated into the second bridge monitoring information management system.
Ensure the effective integration of the lighting and air conditioning system and the power monitoring system, which is embodied in the similarity of the front-end intelligent control module and the uniformity of the background control software.