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Personnel location solution based on wireless local area network
(Wi-Fi RTLS for Locating Personnel)
Uradiosystems.com www.uradiosystems.com
Background overview
This system can accurately identify and track the location of personnel in real-time, whether indoor or outdoor places such as prisons, parks, conferences, factories, mines, etc. Through the real-time tracking and positioning system, safety management can be greatly strengthened, the safety of the place and the self-protection ability of personnel can be improved, the action route of personnel can be automatically recorded, human errors and unnecessary confusion can be eliminated, and the workload of management personnel can be greatly reduced. Improve work efficiency.
system introduction
The wireless local area network real-time location system (Wi-Fi RTLS) combines multiple technologies such as wireless networks, radio frequency identification (RFID) and real-time location. Where the wireless local area network is covered, the system can track and monitor various assets and personnel at any time, and accurately find the target object, so as to realize real-time positioning and monitoring and management of assets and personnel. U-band’s wireless local area network real-time positioning system is composed of positioning tags, wireless local area network access points (AP) and positioning servers.
The wireless local area network real-time positioning system consists of a positioning tag, a wireless local area network access point (AP) and a positioning server. The positioning tag is installed on the target object to be tracked. The positioning tag periodically sends out wireless signals. After the access point receives the signal, it transmits the signal to the positioning server. The positioning server determines the location of the tag according to the strength of the signal or the time difference of signal arrival, and displays its specific location on an electronic map.
Personnel tags can have different designs according to needs, wristband tags, badges, etc.
Features of the real-time personnel location monitoring system:
Standards-based wireless local area network
Wireless local area network is very popular, easy to build, manage and operate; it covers a wide range of 60 meters indoors, 800 meters outdoors or even farther. The wireless local area network can also be used for other purposes such as wireless Internet access, wireless data collection, and wireless IP phones.
Active monitoring
All personnel electronic tags actively send out information at regular intervals to ensure that everyone is in the corresponding monitoring area and provide the greatest degree of modern and efficient means for personnel supervision.
Real-time positioning
Whether in the room or in the outdoor activity area, it can realize the positioning of each person’s electronic tag, and the positioning accuracy can reach 3 meters in the room or open area.
History tracking
By recording the location of the person’s electronic tag, it is possible to replay the activity route of the tracked person, and easily realize the real-time control of the person’s whereabouts.
The only electronic code in the world
Each person’s electronic tag has a globally unique code, which is linked to the corresponding person’s information, and will not repeat and cause confusion.
Multi-label anti-collision design
The wireless local area network access point can simultaneously identify the electronic tags of hundreds of people in the monitoring range, and there will be no conflicts between tags and omissions.
Emergency alarm function
There is an alarm button on the personnel electronic tag, which can actively alarm. There is an alarm function when the tag goes out of the cordon or is damaged.
Integration with existing systems
Personnel electronic tags can be combined with all-in-one card services to manage cash usage, purchase items, etc. It is seamlessly connected to the existing access control system, and can be linked with the video surveillance system.
Wristband humanized design
Personnel electronic tags are ergonomically designed, no allergic reactions, no damage to the skin, and at the same time meet the waterproof requirements.
Vandal-proof design
The built-in conductive material of the wristband forms a loop to effectively prevent damage. Once the wristband is cut, the system immediately alarms.
Design
Demand introduction
A dairy company hopes to track and locate workers in the workshop in real time. The workshop is 80 meters long and 70 meters wide, and 6 meters high. 90% of the workshops are open, and the rest are separated by high walls. There are about 400 staff. The purpose is to realize the positioning and tracking of each production employee in the production workshop, and to draw the road map of the production staff, which is convenient for optimizing work efficiency, transforming the workshop, and optimizing personnel. The system runs independently and does not need to be integrated with existing systems. At present, there is no wireless LAN coverage in the workshop, and there is no demand for wireless Internet access. Finally, a staff walking route map similar to the following figure should be generated:
Design Principles
According to the provided factory floor plan, 27 APs are set, so that each point of the factory will have at least 3 AP coverage to meet the positioning requirements.
The corridor aisle is the main positioning area. We will appropriately adjust the AP position according to the actual site to ensure the signal coverage of the corridor aisle.
The wall material and thickness of the room will affect the wireless signal, so it is necessary to add some APs to assist positioning in some rooms. For rooms less than 10 square meters, an auxiliary positioning AP needs to be added to achieve positioning accuracy.Except changing rooms and bathrooms, the factory has 33 rooms
For the three large workshops, it is necessary to determine the walking route of the personnel according to the location of the equipment.
Function description
Employee tag
1) There is a barcode and employee name on the label
2) When going to work, employees wear tags and hang them on their waists or chests
3) When leaving get off work, the employee returns the label
4) The tags are charged uniformly by the administrator, about once every 1 to 2 months
Positioning software
1) The location of each label is displayed on the electronic map of the plant. Clicking on the location of the label will display the personnel information corresponding to the label. The electronic map can be provided by the customer or drawn.
2) The electronic map determines the walking path and obstacles, and establishes a complete electronic map similar to GPS.
3) Record the employee’s location every 2 seconds, and then draw the employee’s walking route based on the walking path and obstacles. Generate the staff’s daily walking route map, and all staff routes can be superimposed together, represented by different colors and widths.
4) Search for the current location and history of a certain person, and display the moving route.
5) Personnel location report: the time each person stays in different areas each day, the distance moved, etc.
6) Tag management, set up the bonding of tags and personnel.
7) Alarm setting, alarm when a tag enters or leaves a certain area.
8) Provide software secondary development interface
System equipment
Positioning label
Due to the need to record the location of personnel at any time, the tag transmission frequency should be 2 seconds, and the tag has a charging function. The charger is the same as the mobile phone charger on the market. The label is in the form of a badge or hung on the waist. The label’s alarm button, buzzer and LED are optional.
Wireless local area network
Since there is no need for wireless Internet access, wireless LAN APs can choose bottom-end products. Covering an area of 80 meters x 70 meters, each point must be covered by 3 APs at the same time. It is estimated that the number of APs is about 25. The specific figures can only be determined after on-site surveys. The wireless local area network can also be installed by the user’s choice of manufacturer.
If some areas or rooms require more precise positioning, you need to add some APs, such as TPLink, specifically for positioning.
Location server
Dual-core server, 2G memory, 120G hard disk, Windows 2003, IIS server, SQL 2005, and positioning software and label management software.
About Youpin
Suzhou Youpin Technology Co., Ltd. (http://www.uradiosystems.com) is a high-tech enterprise specializing in R&D, design, production and sales of wireless network chips and related products. It has a R&D center in Boston, USA.
The company’s main product is the self-developed wireless local area network real-time positioning system (Wi-Fi RTLS), which is composed of RFID positioning tags, wireless local area network access points (AP) and positioning servers. There is no need for readers or independent construction of other networks. Where wireless local area networks are covered, the system can track and monitor various assets and personnel at any time, and accurately find the target objects, realizing real-time positioning and monitoring and management of assets and personnel.
As the earliest provider of wireless local area network real-time positioning system in China, relying on the technical and talent advantages of R&D institutions in China and the United States, after years of experience and product accumulation, we will bring the most comprehensive and high-quality wireless local area network real-time positioning system to Chinese customers solution.
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