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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. 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.
System installation location
(1) Install the computer host and network server at the proper position of the tunnel port, one set for each port. The rest position is determined according to the actual location of the site (installation principle: not too close to the tunnel entrance, which will affect the construction; also not too far away from the tunnel entrance, which will affect the signal transmission)
(2) The location card readers in the monitoring center and the tunnel are based on the drawings. Because of the relatively long distance, we use wireless signal transmission.
Attendance and query
(1) Through the computer, it can be seen when the construction personnel and supervisors entered the tunnel and when they exited the tunnel.
(2) And can modify, add and query the information of construction personnel and cadres.
a. Modification: If the employee leaves or there is a problem with the card, the employee’s information can be modified.
b. Add: When a new employee comes, the information of the new employee can be added to the database.
c. Query: Divided into precise query and fuzzy query
Precise query: softly enter the name, working hours and gender as keywords to find out the detailed information accurately.
Fuzzy query: Just enter the gender to query the corresponding information.
LED screen display
The basic information of the employees at the entrance and exit of the tunnel should be displayed on the LED screen. The displayed content includes: tag number, name, time, and total number of people.
It can also show the temperature and humidity changes inside and outside the tunnel.
Positioning part
(1) Installation of positioning base station: Install the positioning base station in the area to be monitored, according to the actual situation inside the tunnel.Use wireless transmission to transmit information to the monitoring computer
(2) The base station is installed to be mobile, installed on the lift truck or at the working surface in front of the lift truck, and pushes inside together with the lift truck. The basic information of nearby construction workers can be read from time to time, and the construction personnel can be monitored in real time. .
(3) Real-time view of the basic information of the construction personnel near the card reader through the computer.
(4) Every operator entering the tunnel is equipped with an identification card.
Video surveillance part
(1) Installation of dome camera: Install a dome camera outside each tunnel entrance, which can rotate 360 degrees to shoot. In the tunnel, the dome camera should be installed in the area to be monitored, according to the actual situation in the tunnel. We transmit video information to the computer wirelessly.
(2) The principle of ball machine installation during construction: install a ball machine on the working surface. .
(3) The dome camera is made movable, and can only be installed on the lift truck, and it can be pushed inward together with the lift truck, so that it can take pictures of the construction personnel’s on-site situation from time to time.
(4) The basic information of the construction personnel can be seen through the computer.
The tunnel access control system integrates the functions of tunnel construction personnel’s attendance, regional positioning, safety warning, first aid after disaster, daily management, etc., so that managers can grasp the distribution of personnel and equipment on the construction site and the movement trajectory of each person and equipment at any time. Carry out more reasonable scheduling management and safety 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 and greatly protect the personal safety of tunnel construction personnel.
Schematic diagram of tunnel personnel safety management system/tunnel construction monitoring system:
System composition principle
a. Active radio frequency card
Constructors or workers carry them with them, usually on their belts or helmets.
b. Base station
Both inside and outside the tunnel need to be installed. 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 it on the lift truck and move forward along with the lift truck.
c. RS485 to network port converter:
The system uses the RS485 transmission mode, and the main function of the converter is to convert the RS485 signal into a network port, which is connected to the computer through a network cable.
d. Wireless network bridge:
The video information and control information are transmitted wirelessly to the computer in the monitoring room.
e. Computer host:
Installed in the monitoring room not far from the tunnel entrance, the computer is equipped with time and attendance positioning software and video monitoring software, and the construction personnel are monitored through the computer. It is connected to the terminal through a serial port. At the same time, the host computer also controls the display content of the LED screen.
f. 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.
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