Automatic induction recognition system for tunnel workers’ entrance and exit prohibition positioning system
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1. System structure
1.1 System composition
The tunnel integrated application system mainly consists of personnel entry and exit positioning management system, personnel/vehicle access control system, LED display system, video monitoring system and communication system. (The red part is optional for the system)
Person and vehicle in and out positioning management system
Access management
Positioning management
System remote management
Personnel/vehicle access (access control) system
Access control barrier management
Personnel/vehicle credit card management
LED display system
LED large screen display
Video surveillance system
Tunnel entrance video surveillance
Video Surveillance
Remote video terminal service
Environmental Monitoring System
Hazardous gas detection
Temperature and humidity detection
Communication system
Optical fiber transmission part
Wireless transmission part
Other cable transmission parts
1.2 The overall platform architecture of the system application
◇ Based on the local system, realize the data communication of each functional module;
◇ Can have a remote center, which can query the relevant security information of the current tunnel in real time;
◇ Adopt a three-tier system architecture including front-end work point monitoring, intermediate communication layer, and background scheduling monitoring
◇ Front-end work point monitoring (personnel entry and exit positioning management system, video surveillance, personnel/vehicle access control management) and background dispatch (remote central computer room, server and some external docking platforms) adopt B/S application architecture.
1.3 Topology diagram of system network structure
1.4 Person and Vehicle Entry and Exit Positioning System
The personnel entry and exit management system can be divided into personnel entry and exit attendance management and personnel positioning information management. Mainly include monitoring host, card reader base station, personnel identification card, transmission data interface converter, etc.
Monitoring host (field server): an independent computer, responsible for the management, communication, statistical storage of the entire system equipment and personnel detection data, as well as screen display, query printing, screen editing, network communication and other tasks.
Card reader base station (card reader): collect and receive personnel card information in real time and feed it back to the system in real time through the communication line. It can be divided into positioning base station and identifying base station.
Personnel identification card: programmed with a globally unique identification code, which is only provided to the card reader base station for identification. It is generally installed on a safety helmet or worn on the body, health certification, safe and reliable
Transmission data interface converter: including some signal converters, which mainly realize the conversion of signals so that the system can better receive and process data
The general schematic diagram is as follows
Attendance system: Two card readers are installed in each construction tunnel. One card reader is installed at the entrance of the tunnel entrance, and the other card reader is installed 200 meters inward from the entrance of the tunnel. According to the sequence of the card read by the reader, the entry and exit situation of the construction personnel is judged, and when Entering, when leaving, and how many operators are in the cave can be reflected in the system software, and reflected on the large screen, so that the attendance status is clear at a glance. The construction personnel wear the system attendance card on the inside of the helmet, which can realize automatic attendance without actively swiping the card, which is convenient and labor-saving, and has high accuracy.
Positioning system (optional): According to requirements, this function adopts wired full coverage mode. The 485 bus mode is used to transmit positioning information. Starting from the tunnel entrance, a positioning base station is installed every 150 meters. When the distance exceeds 800 meters, a repeater device is added (the function of this device: extend 485 signal transmission). According to the information of the card read by the positioning base station, the location of the construction personnel in the tunnel can be determined, and the current location of the personnel can be clearly seen on the computer schematic diagram.
1.5 Personnel and vehicle access (access control) system
The access control channel system mainly uses the automatic card swiping mechanism to restrict the entry and exit of personnel to ensure that non-workers are prohibited from entering and exiting the construction area privately. At the same time, it can also be used to ensure the authenticity and validity of the data and avoid the failure of attendance or management errors due to human factors. .Vehicle access control can improve timely management and control of on-site vehicles and achieve more effective vehicle utilization
Host (field server): Responsible for the management, communication and statistical storage of the entire system equipment and personnel testing data
And tasks such as screen display, query printing, screen editing, and network communication.
Barrier gate: It is mainly installed at the entrance to restrict the entry and exit of vehicles. For passable vehicles, the barrier automatically opens to allow vehicles to enter and exit.
Length: 1 to 5 meters
Lifting time: 3 to 6 seconds
Working principle: Turbine transmission integrated machine
Communication protocol: RS485 interface or ground sensing detection and protection device
Box size: 340×280×970mm
Power supply: AC220V/150W
Net weight: 55kg
Applicable temperature: -40℃ ～ +85℃
Three-roller gate: also installed at the entrance of the tunnel, restricting the entry and exit of personnel, the personnel entering and exiting uniformly swipe the card on the machine, and have the machine identification authority to open or limit the order
Size: 420×330×980 MM
Material: 304 stainless steel/sprayed plastic
Channel width: less than 600MM
Control mode: semi-automatic/automatic/manual
Access: one-way / two-way adjustable
Passing speed: 30-40 people/minute
Communication method: TCP/IP or RS485/232, RS485 communication distance <1200M
Direction indication: LED highlights the direction of traffic
Card reader interface: Wiegand interface, or 485/232 interface, supports multiple modes
Machine noise: less than 45 decibels
Continuous trouble-free work times: >4 million times
Card reader: A long-distance card reader can obtain the electronic tag card information carried by personnel/vehicles by approaching automatic card swiping, and transmit it to the background control center.
Schematic diagram
The use of the personnel/vehicle access control channel system can realize the diversion of incoming and outgoing people and vehicles to ensure a certain degree of safety in and out, as long as the personnel and vehicles are equipped with relevant electronic tags. When a person carries a personnel card (ie, electronic tag) and is close to the personnel access control channel, that is, a three-roll gate (swing gate, wing gate), the built-in card reader can read the card information in time, and send it to the background for verification, and the operation passes , Then send a command to the gate to turn on the release, otherwise it will not change. For the vehicle access control system, it is also necessary to configure a vehicle card for each vehicle. When the vehicle passes through the passable area, it will trigger the card reading, and there is also ground sense trigger. When the card is read and ground sense triggered at the same time, the system will determine the vehicle If the passage is allowed, the barrier gate will be opened. A single card reading or a single ground sense trigger, the system agrees that it is not allowed to pass.
1.6 LED synchronous display system
Schematic diagram of LED large screen system
1.7 Video surveillance system
The network video monitoring system includes front-end video capture equipment, network video codec, communication transmission equipment, and back-end monitoring and receiving client software. Installed at the main monitoring points of the tunnel to perform signal collection and transmission. The software is mainly installed on the computer in the monitoring room. The two are authorized by the platform management center system to perform multi-point to multi-point real-time monitoring and management of their front-end video points. Such as: video, pan-tilt, zoom, video, and other functions. Users with administrative rights can also set, download, and perform real-time video on-demand operations on any point of video; the system can also be monitored through a PC browser.
It can be seen that the network monitoring system uses surveillance cameras for 24-hour real-time monitoring of various video points on the tunnel construction site. For some key video points, the video motion detection function and alarm function can be activated. The system automatically recognizes, triggers, and records according to the image movement (there is a pre-recording mechanism, and the pre-recording time can be advanced by more than 20 seconds); at the same time, the system will image, Real-time data such as sound and alarm are transmitted to the computer in the monitoring room. Managers can freely switch the video of any front-end monitoring point through local monitoring, remote IE monitoring, WEB web client and other methods, and can intuitively understand and master the video monitoring points of the construction. Real-time situation, so as to achieve timely and accurate supervision of it anytime, anywhere.
1.8 Gas detection system
The environmental monitoring system focuses on the monitoring of hazardous gases, such as gas. Where gas monitoring is required on the excavation surface, install the corresponding gas monitoring device, and use the gas detector to monitor the gas in the area, so as to notify the background of real-time gas concentration information in time to ensure timely prevention, safety warning, and guarantee tunnels Work is more normal and safer.
The environmental monitoring system mainly includes monitoring servers, front-end perception monitors, transmission interface converters, etc.
Monitoring server: Mainly responsible for receiving, processing, and reflecting the relevant data returned from the previous monitoring equipment, and save it to view the front-end perception monitor: generally refers to data collection equipment, such as gas monitors. It can collect on-site environmental parameters in real time, and transfer them back to the server in real time through the system communication system. Transmission interface converters: including some signal converters, which mainly realize signal conversion so that the system can better receive and process data.
1.9 Communication and background management system
The back-end system adopts the most cutting-edge TV wall technology based on demand analysis, and presents the data on the TV wall in a timely manner through platform services for the administrator to analyze and process in time.
2. Introduction of some performance cases:
Xunlong Tunnel Project of China Communications Third Public Administration
Longnan Tunnel Project of China Communications First Public Bureau
Jianping Tunnel Project of China Hydropower 15th Bureau
Shigushan Tunnel Project of China Railway Third Bureau Group
China Railway Lujiagou Tunnel Project
Baojialing Tunnel Project of China Railway 19th Bureau
Duanjialiang Tunnel Project of China Railway Port and Shipping Bureau
Shimen Tunnel Project of China Railway 18th Bureau
Stone Corridor Project of China Railway 17th Bureau
Yunjing Expressway Tunnel Project of Zhejiang Provincial Transportation Engineering Construction Group
Chongqing Tunnel Project of Trolley Branch Company of China Railway Tunnel Group No. 1 Co., Ltd.
Gansu Tianshui Tunnel Project
Jiangxi Jinggangshan Eling Tunnel Project of China Railway 25th Bureau
China Railway 16th Bureau Group Shanghai Rail Transit Line 13 Tunnel Project
Shaanxi Baolan Industrial Engineering Construction Co., Ltd. Lanxin Railway Ganqing Section Tunnel Project
Yongding County Tunnel Project of the Fourth Branch of China Railway Tunnel Group First Division Co., Ltd.
Ganshao Railway Tunnel Project of China Railway Tenth Bureau Group Co., Ltd.
China Railway 16th Bureau Group Qingcao Shaling Bridge Branch C3 Tunnel Project
Ningde Ningwu Expressway Tunnel Project of China Railway Tunnel Co., Ltd.
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