Yakang Expressway successfully installed tunnel personnel positioning system
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1. System overview
Work safety is related to the safety of people’s lives and property. Governments at all levels have always attached great importance to the issue of work safety in engineering construction, and have taken a series of measures to continuously strengthen work safety. How to change the current backward management mode of tunnel construction process safety management and realize the modernization and informatization of management has become an important subject for managers to study. Therefore, the use of advanced management methods such as disaster prevention, accident rescue, and electronic informatization is an inevitable choice for tunnel construction safety management. According to the needs of tunnel construction safety management, the tunnel construction personnel and equipment safety monitoring and management system developed by Suzhou Renhui IOT Co., Ltd. provides a new safety management concept for tunnel construction safety management.
The tunnel construction personnel and equipment safety monitoring management system is based on the second generation wireless radio frequency (RFID) identification technology, wireless video surveillance technology, combined with advanced communication, computer and network technology, a comprehensive management platform successfully developed. The system integrates the functions of construction site video surveillance, tunnel construction personnel attendance, regional positioning, safety early warning, post-disaster first aid, and daily management. It is also a tunnel construction site monitoring system with leading technology, stable operation and professional design in China. It enables managers to grasp the distribution status of construction site personnel and equipment and the movement trajectory of each personnel and equipment at any time, which is convenient for more reasonable scheduling management. When an accident occurs, rescuers can also quickly understand the location of the relevant personnel according to the data and graphics provided by the tunnel construction personnel and equipment safety monitoring and management system, and take corresponding rescue measures in a timely manner to improve the efficiency of emergency rescue work. This scientific and technological achievement has been verified in the successful installation of the tunnel personnel positioning system at Yakang Expressway.
2. System Design Principles
1. Realize intuitive and real-time digital management of on-site construction images.
2. Realize the effective identification of the entry and exit of tunnel construction workers, realize the visualization of the distribution of construction workers, and make the system management fully humanized, informatized and highly automated.
2. Provide management personnel with information inquiries on attendance operations, personnel entry and exit restrictions and other aspects.
3. In the event of a safety accident, the system can immediately know the number of workers on the tunnel construction face to ensure the efficient operation of rescue and disaster relief and safety rescue work.
4. The system design is safe, scalable, easy to maintain and easy to operate.
5. Standardization: The network video surveillance system is to realize the image transmission and sharing on the network system. The products used in this system all follow the requirements of network protocols and transmission standards.
6. Principle of stability and reliability: The stability and reliability of the system are important indicators of the system, which directly affect the performance of various functions of the system and the life of the system. Therefore, this principle should be followed from system design to equipment selection. Our solution fully considers the actual situation of users, all hardware devices in the system are strictly tested and used, which reduces the possibility of failure caused by environmental factors. The equipment adopts international well-known brands, and the technology adopts the leading and stable new technology of national standard. For example, for wireless equipment, we use IEEE802.11a standard wireless equipment. Practice has proved that its anti-interference and transmission stability are significantly better than other wireless transmission equipment, which effectively guarantees this.
7. The principle of combining ease of use and advanced nature: Making full use of contemporary advanced technologies and means to build an advanced and practical monitoring system is the fundamental purpose of our design. The software has a good interface. After installing the corresponding software, users can monitor and realize intelligent control without separate settings. Therefore, from the user’s point of view, special attention is paid to the ease of use, convenience and intuition of the system, emphasizing the comprehensive capability and overall performance of the system.
3. System design scheme
3.1 Tunnel construction personnel safety management subsystem
This system follows the principle of “unified issuance of identification cards, unified equipment, and unified management”, and implements the “one person, one card” system for the personnel and teams allowed to enter the tunnel, and the identification card can be regarded as a “job certificate” or “tunnel access card” “. The specific plans are as follows:
The tunnel construction unit installs a certain number of signal transceivers in the tunnel, and the specific location is determined according to the site conditions, so as to meet the regional positioning.
The tunnel construction unit shall uniformly distribute and equip relevant personnel with wireless identification cards, which shall be installed in the appropriate positions of the safety helmets.
Each unlimited identification card has a unique card number, and the card number corresponds to the basic information of the employee, including name, age, gender, team, type of work, job title, personal photo, family information, etc., and initialized into the system database.
Personnel entering the tunnel must wear safety helmets with wireless identification cards. When the person passes through the signal transceiver of the tunnel, it is immediately recognized by the system, and through the information exchange of the system network, the information such as the road section and time passed by the person is transmitted to the security monitoring center for recording, and can be recorded on the large geographic information screen wall at the same time. A prompt message appears on the display, showing the name of the person passing through.
3.1.1 System network structure topology
3.1.2 Core functions of the system 3.1.2.1 Dynamic display function
★ Query and display the identity, quantity and distribution of personnel and equipment in a certain area at any time.
★ Query the actual location and activity track of one or more personnel and equipment.
★ Record a series of information such as the arrival/departure time and total working time of relevant personnel and equipment at any location, which can urge and confirm whether important inspection personnel (such as safety inspection personnel) conduct on-site inspections on time and at the point, or carry out various inspections. The detection and processing of item data fundamentally try to eliminate related accidents caused by human factors.
3.1.2.2 Multi-point sharing of information
The central station of the system and the network terminals can be networked in a local area network, so that all terminals on the network can share information at multiple points within the scope of their use rights, so that multiple departments and leaders can share monitoring information at different places at the same time, comprehensively analyze information in the system, and query various data report.
3.1.2.3 No card alarm function
This item is not recommended for owners to use because the false alarm is very high. The main principle is that an alarm will be generated for those who enter without a card. However, once a person with a card and no card enters together, the system will not recognize it. Therefore, this function is only an introduction, not included. use.
3.1.2.4 Query Statistics
★ Construction personnel inquiry: You can inquire about the construction personnel’s current area, stay time, and team leaders entering the tunnel according to the custom combination conditions.
★ Worker distribution inquiry: Inquire about the distribution of construction workers in each area of the tunnel, so that managers can easily know the number of workers in a specific area. Click on the corresponding area to get the relevant personnel details.
★ Unreached area inquiry: It is used to inspect and assess the follow-up status of the relevant responsible persons, and to inquire whether the special type of work has reached all areas of its work scope. Click on the relevant status to get a detailed record of the arriving personnel and work.
★ Statistics of construction personnel: The number of construction personnel entering and leaving the tunnel can be counted according to the date.
★ Regional population statistics: You can arbitrarily set and manage relevant construction areas, and automatically conduct regional population statistics.
3.1.2.5 Attendance management
★ Department attendance query: You can query the attendance of personnel according to the department and various specified conditions, such as: number, name, shift, type of work, department and other query conditions; it can be automatically sorted according to any conditions;
★ Employee attendance query: You can query the attendance of personnel according to various specified conditions, such as: number, name, shift, type of work, department and other query conditions; it can be automatically sorted according to any conditions;
★ Cadre attendance query: query and display the attendance of all cadres on the day;
3.1.2.6 Post-disaster emergency information
Once a safety accident occurs, the control host can immediately display the number of personnel, personnel information, personnel location and other information at the accident site, which greatly improves the rescue efficiency and rescue effect.
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