Which person's positioning system is stable for coal mines?

Tunnel is a high-risk engineering industry, and many people will consider whether personal safety is guaranteed when talking about tunnel safety accidents. Construction safety control is the key to ensure the personal safety of tunnel construction personnel. The traditional safety control method of tunnel construction focuses on the rules and regulations of tunnel construction management, and there are many practical protective equipment to wear. However, this safety control method is not effective and practical, especially in risk early warning and rescue afterwards.

First, the tunnel and highway construction site, there are the following problems in management:

1, facing the long road construction line, managers can't grasp the position of construction personnel;

2. The attendance of personnel on the open construction site cannot be well managed;

3. Because the tunnel is long and narrow and the construction environment is complex, the managers can't guarantee the safety of the construction workers.

In view of the above problems, we can adopt an intelligent management system based on location information service: tunnel personnel positioning management system. Provide one-stop service for the construction site, effectively solve the above problems.

Second, the tunnel personnel positioning system.

The invention solves the problems that the tunnel encounters unexpected accidents, the rescue of construction workers lacks reliable position information and voice communication means, and the efficiency of emergency rescue, disaster relief and safety rescue is low. Because the communication network is not smooth, the communication mode is single, and the network carrying capacity is poor, it often leads to poor communication, poor command and inaccurate figures in the early stage of the leadership, which is not conducive to accident rescue and is easy to cause the accident loss to expand. The tunnel personnel positioning system uses the corresponding personnel tracking and positioning equipment to automatically track and check the attendance of construction personnel in all weather, and grasp the position and activity track of each employee in the tunnel at any time. In the process of construction, employees can press the distress button on the locating card in case of emergency, and the system will automatically call the police. The management department grasped the situation at the scene for the first time and sent rescuers for emergency rescue in time.

Third, the system principle.

On the basis of ultra-low power Bluetooth technology, a Bluetooth positioning algorithm with accurate positioning and ultra-low power consumption is designed by combining various filtering algorithms and elimination algorithms.

Using Bluetooth positioning technology, several wireless Bluetooth beacons are installed on site to broadcast Bluetooth signals regularly. The locator worn by people or articles receives the wireless signal broadcast by Bluetooth beacon in real time, judges the signal strength (RSSI), converts it into the distance between Bluetooth beacon and locator, and then determines the location of locator according to the geometric relationship between equipment and nodes.

Fourth, the system function

Real-time positioning: visually check the positions of various types of people (different types of workers, visitors, etc.). ).

Historical trajectory: it can play back the trajectory of people in a specific period of time and provide decision-making basis for time processing.

Cross-border alarm: when a person enters an area beyond his authority, an alarm is issued.

Static alarm: when people are in a static state for more than a certain time, an alarm is issued. Give timely treatment to people in coma and other situations.

Data statistics: statistics of the real-time total number of people in each work area and the total number of people in historical period (including personnel information).

One-button help: When the relevant personnel have an accident, you can press the button on the portable badge for help, notify the rescue in time, and immediately set the help position in the background.

Detention alarm: When people stay in a certain area for too long, the system can send out alarm information to ensure the safety of the relevant area.

Video linkage: once someone has an accident, the alarm can trigger the nearby camera at the same time, and the live video screen will pop up immediately, which is convenient for emergency personnel to know the situation at the first time.