Underground personnel positioning system

In recent years, coal mine accidents have occurred from time to time. How to strengthen preventive measures for safe production, how to correctly handle the relationship between safety and production, safety and benefits, and how to accurately, real-time and quickly perform coal mine safety monitoring functions to ensure the efficiency of emergency rescue and safety rescue Operation is placed in front of the competent authorities and leaders at all levels of the country. At the same time, how to change the current management mode of coal mine enterprises for the lagging people underground, and how to realize the modernization and informatization of management have also become the concerns of all coal mine enterprises. We believe that it is imperative to establish informatization and intelligentization with the main objectives of disaster prevention, accident rescue, and electronic information management.
During the “Tenth Five-Year Plan” period, the electronic information construction of the coal industry was based on the development of the “Ninth Five-Year Plan”, focusing on the strategic tasks of reforming and developing the coal industry, focusing on the development and utilization of information and knowledge resources, combining with the actual needs of the coal industry. The informatization construction of coal mine production safety monitoring and control, automatic control and enterprise management systems has been incorporated into the operation and management schedule of safety production enterprises. As a leader in RFID technology, we have adopted the latest international SUPER-RFID technology and developed the “Automatic Identification Management System for Mine Safety Production Underground Personnel and Equipment Distribution”. Upgrading of business management has brought new opportunities.

The basic functions realized by the above scheme in terms of downhole personnel positioning management include:

1. Real-time display and query of underground conditions through geographic information based on GIS technology:

1. How many people are in the well or in a certain place at any one time, the location of the people in the well, and who are these people?

2. The activity trajectory of each person at any time in the underground.

3. Query the current actual location of one or more personnel (location of underground personnel), so that the dispatch center can quickly and correctly contact the personnel by telephone.

4. Inquire about a series of information such as the arrival/departure time and total working hours of relevant personnel at any location, and can supervise and confirm whether important inspection personnel (such as: gas detection personnel, temperature detection personnel, exhaust personnel, etc.) are on time and arrive Perform the testing and processing of various data at various points, and fundamentally eliminate related accidents caused by human factors.

5. Multi-point sharing can be realized for multiple leaders to view at different places at the same time;

2. The real-time dynamic distribution of underground personnel in the tunnel at all times, and the corresponding dynamic map positioning is made according to the actual geographical situation of the underground, so that the underground situation is vivid and vivid at a glance;

3. Automatically calculate various reports of various types of personnel going down the well, such as:

1. The production personnel’s downtime report, monthly attendance report, overtime report, leave or absence report and other management required basis and can generate salary report, etc.

2. Develop and count management personnel’s inspection report and so on.

3. Whether other personnel, such as visitors and inspectors, go to the designated area as required.

4. Once various accidents occur, how many people are in distress can be found immediately, and where are the persons in distress? Who are they?Outstanding role of underground personnel positioning

5. Use mobile identification devices during emergency rescues to more accurately and quickly identify the specific locations and locations of persons in distress, and improve rescue efficiency and rescue effects.

The functions implemented in device management include:

1. The specific real-time location of the car and other important equipment

2. Count the number of daily transportations and the frequency of ingress and egress of each minecart, which is convenient for management.

system introduction

1. Features of underground personnel positioning system:

Highly automated

Advanced network communication system

Geographic Information Display and Query System Based on GIS Technology

Complete data analysis system

Safe and reliable, work normally in harsh environments 24 hours a day

l Long distance, the effective recognition distance is adjustable from 2 meters to 80 meters.

l High anti-collision performance, adopting multiple anti-collision schemes, can identify more than 200 signs at the same time.

l High speed, Super RFID can move at a speed of more than 200 kilometers per hour.

l High recognition reliability, misreading rate is less than five out of 100,000.

l Easy installation, integrated design, no need for external antenna or ground sense.

l Intelligent, two-way high-speed data exchange can be realized between RFID and transceiver, making application flexible and ensuring data security.

lCan realize directional and non-directional recognition.

lHigh reliability, adapt to the working environment of industrial and mining (-40℃-85℃), waterproof and shockproof.

lLow cost, all 0.18uM chips are used, and the cost is lower.

lUltra-low power consumption, healthier and safer.

lThere is no need to apply for and pay for the ISM microwave frequency band that is open worldwide.

lHigh anti-interference, no special requirements for various interference sources on site.

3.Working principle of underground personnel positioning system

First of all, place several signal transceivers in the various tunnels and the passages through which all personnel may pass. The specific number and location are determined according to the actual working conditions of the site and the functional requirements to be realized, and they are routed through the network wiring and the ground control center. Computer networking. At the same time, a signal sensor is placed on the miner’s lamp worn by each downhole. When the downhole enters the well, as long as they pass or approach any signal transceiver placed in the tunnel, the signal transceiver will immediately sense the signal and upload it immediately. On the computer in the control center, the computer can immediately determine the specific information (such as: who, where, and the specific time), and display it on the large screen of the control center or the computer display screen and make a backup and management The user can also click on a certain location downhole according to the distribution diagram on the large screen or on the computer, and the computer will then count and display the personnel in this area. At the same time, the computer of the control center will sort out various attendance reports of each person who went down during this period (such as attendance rate, total attendance time, late/early leaving records, non-attendance time, etc.) according to the personnel entry and exit information for a period of time. In addition, once an accident occurs underground, the personnel at the accident site can be found immediately based on the personnel location distribution information in the computer, and then special detectors can be used to further determine the location of the personnel at the accident site to help rescuers in an accurate and rapid manner Rescue the trapped people. The management principles of mine carts and other equipment are roughly the same.

5.Design principles of underground personnel positioning system
(1) Realize the effective identification of the entry and exit of the working surface of the underground tunnel, so that the system management fully reflects the “humanization, information and high automation”
(2) Provide senior management personnel with information inquiries on attendance, personnel entry and exit restrictions and other aspects.
(3) Once a safety accident occurs, the system can immediately know the number of workers on the working surface of the tunnel to ensure the efficient operation of rescue and rescue work.
(4) After a safety accident occurs, the mobile identification device of this system can detect the presence of people within 10 meters of the accident site, which is convenient for the timely deployment of rescue work.
(5) The safety, scalability, easy maintenance and easy operation of the system design.

6. Design basis of underground personnel positioning system
(1) GA/T75 “Procedures and Requirements for Safety Protection Engineering”
(2) MT209-1990 “General Technical Requirements for Electrical and Electronic Products for Coal Mine Communication, Testing and Control”

7. Design features of underground personnel positioning system
(1) Highly automated. The system can automatically detect the time and location information of the underground tunnel workers passing the monitoring point, and automatically realize the statistics and management of attendance operations.
(2) Advanced communication system. The identification system installed in each channel of the underground mine transmits the data passed by relevant personnel to the network server in real time, without human intervention in the whole process.
(3) Complete data statistics and information query software. The system software has a dedicated database management system, including the information collection and statistical analysis system for workers passing through the tunnel, the statistical and management analysis system for attendance operations, display and print various statistical reports, and provide a full range of services for senior management inquiries and management .

(4) The safety, stability and reliability design of the system. The system products adopt the tunnel wall-mounted design, no need to carry out on-site construction in the tunnel, and ensure that the system operates continuously and normally for 24 hours in harsh environments;
(5) Complete alarm call system configuration for abnormal conditions (including invalid sensor and invalid sensor entry).
8. Design scheme of underground personnel positioning system
This system follows the principle of “unified sensor distribution, unified equipment, and unified management”, and implements the “one person, one sensor” system according to the permission of staff and teams, and the sensor can be regarded as an “entry certificate” or “tunnel access certificate” . The specific plan is as follows:
(1) The coal mine production unit installs a certain number of signal transceivers in all tunnels, and the specific location is determined according to the site conditions to meet the radiation area.
(2) The coal mine production unit issues and equips the relevant personnel with sensors, which are installed in suitable positions of the safety helmets.
(3) When sending the sensor, log in the basic information of the employee corresponding to the sensor, including name, age, gender, team, type of work, position, photo, etc., in the system database.
(4) The sensor will become effective after the safety production department authorizes the sensor. The scope of authorization includes: the employee can be qualified to enter the tunnel on the work surface, the time limit, failure, and loss of the sensor, etc., to prevent irrelevant and illegal persons from entering the tunnel;
(5) Personnel entering the tunnel must wear safety helmets equipped with sensors. When the person passes the identification monitoring point of the tunnel, he is immediately recognized by the system, and through the information exchange of the system network, the information such as the road section and time passed by the person is transmitted to the well safety monitoring center for record, and can be recorded on the large geographic information screen at the same time A prompt message appears on the wall, showing the name of the passing person. If the sensor number that is sensed is invalid or enters a restricted channel, the system will automatically alarm, and the security monitoring center staff on duty receives the alarm signal and immediately executes the relevant safety work management procedures.
(6) Once a safety accident occurs in the tunnel, the safety monitoring center can know the basic situation and positioning of the trapped person in the first time. The rescue team uses a mobile remote identification device to easily detect the location of the person in distress within a range of 10 meters. Facilitate the safe and efficient operation of ambulance work.

9. According to the actual situation of the mine, we have solved the technical problem of the application of underground personnel positioning system products in the mine:

1. The problem of the safe operation of the equipment itself underground

In view of the special environment and working characteristics of underground mines, our equipment (signal transceiver) achieves:
It adopts an all-metal shell, which is firm in structure, anti-collision and anti-vibration.
Fully sealed design, waterproof, moisture-proof, anti-corrosion.

2. The operation of the equipment must not affect the safety of the underground mine:

The device has ultra-low power consumption, with a peak power of less than 1 milliwatt.

3. The problem that the working voltage of the system in the well is less than 18V DC

Fourth, the equipment adapts to various installation environmental problems both above and below the mine

The equipment has a very high degree of anti-interference, and basically has no requirements on the installation site, which guarantees the high reliability of the equipment operation and greatly simplifies the installation and maintenance workload.

5. The whole system is designed as a “fool type”, with extremely low technical requirements for users, with simple and adjustable functions, automatic fault inspection functions, and so on.

6. Simple construction and installation in the tunnel.

The product adopts the direct wall-mounted type in the underground, and it can be connected to the DC power supply and the network cable connector. It is also very convenient and easy to change and add the underground detection point in the future. .

Seven, simplification of fault handling

When a machine fails, just replace it with a spare machine.