2.4G Long-distance Tunnel Personnel Automatic Attendance and Positioning System Solution
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1. Background of 2.4G Long-distance Tunnel Personnel Automatic Attendance and Positioning System
With the rapid development of the country’s economy, my country’s tunnel construction is changing with each passing day. Because urban subways, railway tunnels and highway tunnels have improved route technical indicators, shortened distances and travel time, and increased operating efficiency; coupled with the high cost of tunnels and relatively complex operation and management, all regions attach great importance to the construction of tunnels.
The current remote information management system is often only the management of administrative and technical documents, and cannot obtain real-time construction information, let alone a comprehensive, timely and accurate grasp of the construction party’s information and construction personnel. This led to many accidents. For this reason, governments at all levels attach great importance to the safety of production in engineering construction and adopt a series of measures to continuously strengthen safety in production. How to change the current management mode of the backward safety management of the tunnel construction process and realize the modernization, informatization, and intelligence of management has become an important topic for managers.
Therefore, the use of advanced management methods such as disaster prevention, accident rescue, and electronic information technology is an inevitable choice for the safety management of tunnel construction. In response to the above situation, Shanghai Boao Electronic Technology Co., Ltd. proposed the “Tunnel Personnel Attendance and Positioning System Solution” and provided a brand-new safety management concept for the safety management of tunnel construction.
2. Overview of the tunnel personnel attendance and positioning system
The Tunnel Staff Attendance and Positioning System integrates the functions of tunnel construction staff’s attendance, regional positioning, safety early warning, post-disaster first aid, daily management and other functions. It is also a domestic tunnel construction site monitoring system with leading technology, stable operation and professional design. Enable managers to keep track of the distribution status of personnel and equipment on the construction site and the movement trajectory of each personnel and equipment, facilitating more reasonable scheduling management. When an accident occurs, rescuers can also quickly understand the location of relevant personnel based on the data and graphics provided by the tunnel construction personnel and equipment location monitoring safety management system, and take corresponding rescue measures in time to improve the efficiency of emergency rescue work. The realization of this scientific and technological achievement will provide a strong guarantee for the safe production and daily management of tunnel construction to a new level.
Third, the structure of the tunnel personnel attendance and positioning system
The tunnel personnel attendance and location management system is divided into the outside of the tunnel and the inside of the tunnel
Outside the tunnel: outdoor monochrome display, RS232/RS485 converter, RS485 transmission interface, a computer, signal lightning protection grid, unique detection management station
Inside the tunnel: controller, explosion-proof card reader, safety identification card, RS485 repeater, explosion-proof uninterruptible power supply, cable, transmission method and transmission equipment can be selected according to the user’s actual network conditions
Four, system characteristics
Outstanding performance
High recognition reliability, 100% front-end recognition rate
Long recognition distance (2-50 meters)
High anti-collision performance (each detection point can identify up to 300 people at the same time)
High recognition stability (error rate is less than one hundred thousandths), truly achieve no errors and no missing cards
Fast recognition speed (up to 200 km/h recognition speed)
Wide range of applications
In line with the existing network conditions of the tunnel, it can provide multiple tunnel-to-tunnel transmission methods based on optical fiber, Ethernet, communication cable, etc., which has strong adaptability and avoids the difficulty of implementation due to a single transmission method.
High safety and stability
With safe explosion-proof, dustproof and waterproof performance
High anti-interference, no special requirements for tunnel interference sources and perimeter environment, strong environmental adaptability
The internal circuit is highly integrated, the device failure rate is minimized, and the operation is reliable
Using active identification card, no electromagnetic pollution, maintenance-free, safe to use
Simple and convenient operation
Directly import the original CAD drawing of the mining area, easy to operate, no need to redraw the mining area map; ensure that the displayed graphics are in the same proportions as the original drawings of the customer
The software has a full Chinese menu with a good operation interface
The integrated structure design of the wireless monitoring sub-station does not require an external antenna or ground sensing coil, which is convenient and quick to install
The built-in battery of the identification card, ultra-low power consumption, no external miner’s lamp power supply, no need to charge
Rich query and report functions
Query and report output, printing functions are simple and easy to operate
Can query the attendance information of construction personnel, departments and cadres
Can query the construction personnel’s movement trajectory
Various information reports can be output as required (such as: tunnel entry time report, personal attendance daily report, construction worker attendance monthly report, department attendance monthly report, etc.)
Five, working principle
① Install the controller in the area where people need to be tracked in the tunnel. It maintains communication with the ground central station through the RS485 data bus, and uses a three-way junction box at the joint, which is powered by an external flameproof uninterruptible power supply.
②The explosion-proof card reader is connected to its own controller through the RS485 bus, and the power is supplied locally.
③The person entering the tunnel wears a security identification card (the card is installed on the worker’s protective cap or carried on the key chain), and the security identification card that is worn continuously emits 2.4G radio signals, and the wireless signal is coded , The code of each identification card is unique.
④ The explosion-proof card reader receives the signal sent by the safety identification card within the effective measurement range, and sends it to the data monitoring substation through the RS485 interface, and then the data monitoring substation sends it to the outside of the tunnel for recording and display.
⑤The card reader at the entrance and exit of the tunnel receives the signal sent by the security identification card and sends it to the data monitoring substation through the RS485 interface, so as to realize the attendance of the staff.
⑥The ground center station judges the specific information of the security identification card (such as who it is, where it is, and the specific time) according to the installed mine attendance and location management software, and can display the information on the large screen or computer display of the control center at the same time And make a backup.
Six, system function
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 current actual position and activity track of one or more personnel and equipment.
★ Record a series of information such as the arrival/departure time and total working hours of relevant personnel and equipment at any location, and can supervise and implement whether important inspection personnel (such as: safety inspection personnel) conduct on-site inspections on time and on-site, or conduct various inspections. The detection and processing of items of data will fundamentally prevent related accidents caused by human factors.
2. Multi-point sharing of information
The system central station and network terminals can be operated in a local area network, so that all terminals on the Internet can share information at multiple points within the scope of use authority, so that multiple departments and leaders can share monitoring information, system comprehensive analysis information, and query various data at different locations at the same time. Report.
3. Set the alarm function
The system can set up warning areas according to the needs of construction management. For example: when blasting in a tunnel, set the blasting work surface as a guard area. If unauthorized personnel and equipment enter the guard area, the system will automatically alarm and display the identity of the personnel and equipment entering the guard area. The alarm will be released after the blasting is over set up.
4. Query statistics
★ Inquiry of construction personnel: Inquire about the current area, detention time and leader of the construction personnel entering the tunnel according to the custom combination conditions.
★ Query of Worker Distribution: Query the distribution of construction personnel 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 detailed information about the relevant personnel.
★ Non-arrival area query: used to inspect and assess the situation of relevant responsible persons and follow-ups, and to inquire whether a special type of work has reached all areas of its work range. Click on the relevant status to get the detailed records of the arriving personnel and work.
★ Statistics of construction personnel: The number of construction personnel entering and exiting the tunnel can be counted according to the date.
★ Regional population statistics: You can arbitrarily set and manage related construction areas, and automatically perform regional population statistics.
5. Attendance management
★ Department Attendance Inquiry: The attendance status of personnel can be inquired according to the department and various specified conditions, such as: number, name, shift, type of work, department and other query conditions; can be automatically sorted according to any conditions;
★ Employee Attendance Inquiry: The attendance status of personnel can be inquired 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 Inquiry: Query and display the attendance status of all cadres on the day;
6. Post-disaster first aid information
Once a safety accident occurs, the control host can immediately display information such as the number of personnel, personnel information, and personnel location at the accident site, which greatly improves rescue efficiency and rescue effects.
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