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Chapter 1 Overview
1.1 System background
With the rapid development of the country’s economy, my country’s tunnel construction is changing with each passing day. As urban subways, railway tunnels and highway tunnels have improved route technical indicators, shortened distances and travel time, and increased operational efficiency, the country is constantly increasing the construction of tunnels; however, the construction cost of tunnels is high and the operation management is relatively complicated. Therefore, all places attach great importance to the construction of tunnels and dare not take it lightly.
The current remote information management system is often only the management of administrative and technical documents, and cannot obtain construction information in real time, let alone a comprehensive, timely and accurate grasp of the information of the construction site and construction personnel, which leads 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 lagging management mode of safety supervision during tunnel construction and realize the modernization, informatization, and intelligence of management has become an important topic for managers to study.
Therefore, advanced management methods such as disaster prevention, accident rescue, and information management will be an inevitable choice for the safe construction of tunnels. In response to the above situation, Shanghai Chaowei Electronic Technology Co., Ltd. puts forward the “Tunnel Personnel Attendance and Positioning System Solution”, which provides a brand-new safety management concept and strong guarantee for the safe construction of the tunnel.
1.2 System introduction
Tunnel personnel attendance and positioning system is a combination of tunnel construction personnel attendance, regional positioning, safety early warning, post-disaster first aid, daily management and other functions. It is also a domestic technology-leading, stable operation, and professionally designed tunnel construction site monitoring system. It enables management personnel to grasp the distribution status of personnel and equipment on the construction site and the movement trajectory of each personnel and equipment at any time, facilitating more reasonable scheduling management and safety monitoring management. When an accident occurs, rescuers can quickly understand the location of relevant personnel based on the data and graphics provided by the system, and take corresponding rescue measures in time to improve the efficiency of emergency rescue work. The realization of this scientific and technological achievement has promoted the safe production and daily management of tunnel construction to a new level.
The tunnel personnel attendance and positioning system can not only realize attendance or positioning, but also realize two functions of attendance and positioning at the same time. Moreover, we have designed two versions of the system software, an installation version and a network version, which can be used for on-site monitoring and remote monitoring, which greatly meets the different needs of different users.
Chapter 2 System Design
2.1 System composition
The tunnel personnel safety management system consists of four major parts, namely: personnel information system, attendance positioning system, LED display system (optional), and data management system.
2.2 Working principle
2.2.1 2.4G active radio frequency tag:
The active radio frequency card is a circular label, which is installed on the helmet of the construction personnel or working personnel, and is generally installed on the belt or helmet of the construction personnel. The construction personnel read the tag ID when issuing the helmet and bind it with the personnel information in the system. When people enter the tunnel, they use Chaowei’s long-distance reader to realize entry judgment and location recognition.
2.2.2 2.45G long-distance reader:
No matter whether it is inside or outside the tunnel, readers need to be installed and placed. At least 2 units are required in one system. If it’s positioning, you need more. Specific installation should be carried out according to the conditions of the tunnel. The general principle is to install one every 150 meters, and it can also be installed in corners and some areas that require special monitoring. The positioning principle of this system is regional positioning, which is based on the position of each reader. Therefore, the accuracy of positioning depends on the recognition distance of the reader. The distance of the reader can be adjusted by software, so the positioning is considered The accuracy should also consider the distance of the card reading and the overall cost of the system, that is to say, the higher the positioning accuracy, the closer the distance of the card reading and the higher the cost. Please note!!!!!
Chaowei long-distance readers can realize the self-organizing network function, that is, the readers can only be used for electricity, and there is no need to construct and arrange data lines. The distance between readers must be less than 500 meters.
2.2.3 Central control machine:
The central control machine is installed at the entrance and exit of the tunnel test situation, and the Chaowei long-distance reader will transmit to the central control machine after self-organization. In addition to receiving the radio frequency signal, the central control machine can also realize the data forwarding function, which can realize 3G, TCP/IP, etc. are transmitted to the system center; if an LED display is needed at the door, it can be directly transmitted to the computer terminal at the door, and the LED display can be realized through the terminal software.
2.2.4 The host computer of the management center:
Installed in the monitoring room not far from the tunnel entrance, the computer is equipped with attendance and positioning software, and the construction personnel are monitored through the computer. It is connected to the central control machine through a serial port. At the same time, the host computer also controls the display content of the LED screen.
2.2.5 LED display:
Installed near the tunnel entrance, used to display the information of the construction personnel, so that the management is advanced and transparent. The displayed content includes: tag number, name, time, and total number of people (the size of the screen is 1.28M*0.8M, and the screen can also be larger).
2.3 Other matters
(1) The number of readers and the installation method are determined according to the actual situation of the tunnel site, and the two parties shall negotiate and settle.
(2) Software function: The function of the system software is developed according to the customer’s requirements, please communicate with the software developers of our company before the software development.
(3) The card issuer is used to identify the RFID tag signal of the safety helmet at close range and bind personnel information in the system.
Chapter 3 System Features
3.1 Excellent performance
High recognition reliability: 100% front-end recognition rate. As long as the construction personnel wear the 2.4G active radio frequency card correctly (unless it is broken), it can be read by a nearby card reader.
Long recognition distance (0-80 meters): A stable distance with a radius of 50M can be reached in the tunnel, and the information sent by the tag card within this range will be read.
Extremely high anti-collision performance: Each detection point can simultaneously identify up to 200 construction personnel’s information.
High recognition stability (error rate is less than one hundred thousandths), truly achieve no errors and no missing cards.
Fast recognition speed: the fastest recognition speed can reach 200 km/h, that is, the dynamic tag card can also be recognized.
3.2 Convenient and wide application
Taking into account the complexity of the internal wiring of the tunnel and the convenience of construction, Chaowei long-distance readers can realize the self-organizing network function, data transmission does not need wiring, and only provides 12V direct current.
3.3 High security and stability
With safe explosion-proof, dustproof and waterproof performance
High anti-interference, no special requirements for tunnel interference source and surrounding 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
3.4 Simple and convenient operation
The software has a full Chinese menu with a good operation interface
Integrated structure design of wireless monitoring substation, convenient and quick installation
Identification tag built-in battery, ultra-low power consumption, no external miner’s lamp power supply, no need to charge
3.5 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.)
The real-time situation of the tunnel can be viewed remotely on any computer with Internet access, without the need to go to the scene. (Online version software function)
It can be known at any time how many people there are in the cave, who are these people, and can be displayed on the LED display at the same time. The specific display content depends on the size of the display.
Chapter 4 System Function
4.1 Attendance management function
Through the card reader, it can be judged that the construction personnel are the entry and exit records at any time.
Can add, modify, and query information about construction personnel, cadres and departments.
Employee Attendance Inquiry: The attendance status of personnel can be inquired by 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;
Cadre Attendance Inquiry: Query and display the attendance status of all cadres on the day;
Reports can be output according to user requirements
4.2 Positioning management function
You can inquire at any time and display the identity, quantity and distribution of personnel and equipment in a certain area.
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, so as to supervise and confirm whether important inspection personnel (such as: safety inspection personnel) conduct on-site inspections on time and on-site, or perform various items. The detection and processing of data fundamentally eliminates related accidents caused by human factors.
4.3 Setting the alarm function
Set the alarm function in the specific area, and set the authority for the label card. 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, and take corresponding measures in time , And cancel the alarm setting after the blasting is over.
4.4 Query Statistics
Construction personnel query: You can customize the combination of conditions to query the current area of the construction personnel, the detention time and the leader of the shift into the tunnel.
Worker distribution query: 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.
Unreached area query: used to inspect and assess the situation of relevant responsible persons and follow-ups, and to inquire whether the special type of work has reached all areas of its work scope. 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 up and manage related construction areas, and automatically perform regional population statistics.
4.5 First aid information after a disaster
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 rescue efficiency and rescue effectiveness
4.6 Information networking function
By setting up a WEB server, information sharing can be achieved by browsing web pages, and the client does not need to add any additional software. (The computer in the monitoring room is required to be able to access the Internet)
4.7 Other functions
If the above functions cannot meet your requirements, we can tailor the functions for you.
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