ZigBee tunnel personnel area positioning system

i. program overview

Shidian Technology tunnel personnel 2.4G regional positioning system, regional positioning is belongs to a kind of perception positioning system, using the principle of long-distance recognition. To enter certain areas of the positioning card for automatic identification and regional positioning. That is, when the personnel wear positioning card, after arriving at a certain area, monitoring center server, can real-time detection of the current location of the personnel wearing the label area, and displayed on the regional map. The system reads the card speed 200 / sec, reads the card distance 0 meters to 100 meters adjustable, does not miss the card. It provides managers with real-time personnel statistics in the positioning area, attendance of people and vehicles, real-time map display, alarm in the dangerous area, real-time statistics on the LED screen, first aid after a disaster, daily management and other functions. It can help the management to find and improve the weak links and prevent the occurrence of construction safety accidents.
In the tunnel, through the 2.4G positioning base station senses the personnel positioning, through the positioning base station uploaded to the monitoring center server, and then after the software analysis and processing, using the form of the system map real-time display of the cave personnel positioning position, the distribution of personnel in the cave to achieve real-time mastery.

II. Purpose of tunnel positioning

• Ensure tunnel construction safety, construction progress, etc;
• Special areas to limit access and time of stay for security management;
• Real-time display of personnel dynamic information, realizing to let personnel dynamic management;
• Reduce manual attendance workload and improve employee attendance.

III. System architecture

The 2.4G regional positioning system for tunnel personnel is composed of: 2.4G positioning base station, 2.4G positioning tag card, and software management terminal.

Data transmission: This can be done by deploying wireless bridges, fiber optics, Ethernet, etc.

IV. Schematic diagram of the installation of 2.4G area positioning for tunnel personnel

V. Functional features of the system

✪ Non-precise positioning in tunnel cavities:

Adopting advanced 2.4G technology, it has the ability to locate the accurate number of cards without missing cards;
The distance between the device and the card is estimated from the RSSI value using the signal time-of-flight calculation method.

✪ Positioning of personnel in hazardous areas of tunnels:

Mount the positioning base station on a two-lined or waterproof dolly;
Personnel pass through the second lining cart into the waterproofing cart or excavation cart, and the positioning base station can accurately count and display the number of personnel and location information.

✪ The map shows the distribution of people in real time:

Map real-time display to locate the base station installation location, the current distribution of construction personnel;
The map displays device warning messages and operational status.

✪ Synchronized LED display showing the situation of the people in the cave:

Construction personnel information is registered through the software when personnel are first issued cards;
The LED screen at the cave entrance synchronously displays the information of the personnel locating the base station inside the cave (e.g. name, time of entering the cave, current position, contact phone number, etc.)

✪ Positioning the base station is easy to install:

Positioning base station with integrated design (including power supply, power box, bracket, bridge positioning equipment) to provide a set of camera mounting positions and power supply interface;
All that is required for installation is a fixed mounting position and access to 220V power supply.

✪ Automatic time and attendance for construction workers entering and leaving the tunnel:

Positioning base station combined with cave attendance equipment, the software automatically generates all kinds of reports, providing users with convenient daily management;
Provide construction personnel's attendance days, the number of people who arrive at the site of each shift and each type of work statistics, can be exported to Excel table.

✪ Support various data query functions:

Data can be queried based on a variety of conditions (e.g., personnel name, time, construction unit, work type, etc.);
Time in and out of priority areas, number of current construction workers, and total number of people on site.

✪ The command center may issue evacuation orders:

The command center can give evacuation instructions to the construction workers in the tunnel, and the construction workers can withdraw from the tunnel in time after receiving the evacuation alarm signal on their locator tag cards.

VI. Positioning base station installation specifications and examples

2.4G regional personnel single base station coverage of 100 meters, need to install two points, respectively installed in the second liner trolley and waterproof trolley. A positioning base station and a pair of wireless bridges are installed on the second liner trolley; the bridge facing the outside of the cave is used to receive signals from the bridge at the entrance of the cave, and the bridge facing the inside of the cave transmits signals to the equipment in the cave. The positioning base station and relay bridge are connected by network cable. The front of the base station faces the cave wall at an angle of 45 degrees. The positioning base station adopts 12V power adapter to supply power, the power supply is placed in the waterproof box, and all lines must be fixed firmly through the pipe.

The waterproof dolly is installed with a positioning base station and a receiving end bridge. The front of the base station is facing the excavation surface, the network is connected to the switch interface of the waterproof cart, the equipment is powered by DC12V/1.5A power adapter, the power supply is placed in a waterproof box, and all the lines must be protected by wiring ducts.

VII. Introduction to the software

Tunnel construction is a high-risk operation, so it can locate the construction personnel in the area, query the identity, number and distribution of the construction personnel in the area, and query the actual position and activity track of the personnel. The accuracy of positioning depends on the type of base station and positioning card, and the system can add auxiliary markers, set the operation area, dangerous area, history playback and other functions.

VIII. Hainan Shidian

Hainan Shidian Technology Co., Ltd. to "make the standardization of industrial Internet of Things easier" as the vision, focusing on the direction of the Internet of Things industry chain, indoor positioning, sensing and control and data transmission products in the field of continuous research and development, Lego (Lego) production, precise to meet the small amount of industrial Internet of Things products and a variety of demand characteristics, to provide customer Complex environment and personalized needs to meet the real low inventory, high satisfaction of the new supply and demand relationship.

The company has four R&D centers in Shanghai, Suzhou, Chengdu and Taipei, adhering to the group's nearly 40 years of good business resources and reputation, firmly believe in the "be an expert in the industry" business philosophy, precise in the channel, sensitive to the market, focus on products, "research" is reliable, "production" is stable, "sales" is quality, always focusing on the industrial Internet of Things customers personalized scenarios to meet the ultimate needs. We believe in the business philosophy of "being an expert in the industry", we are precise in channels, sensitive to the market, and focus on products, "research" is reliable, "production" is stable, "sales" is quality, and we are always focusing on the ultimate satisfaction of personalized scenarios of industrial IoT customers.

In terms of products, we have both Zigbee positioning products, which have been cultivated by our self-research team for more than 10 years, and UWB positioning products, which are developed by our teams in Shanghai and Taipei, to meet the different needs of customers for positioning accuracy. At the same time, the company also introduces Bluetooth positioning products to supplement the self-developed solutions, in order to fully meet the needs of all kinds of customers.

Software support we integrate the overall program of various industries, actively open interfaces and source codes for system integrators to join, for related system software companies to do case demonstration based on our products to provide convenience, so that the Internet of Things indoor positioning applications broader.