Plant area location management system
A system overview
The RFID-based factory area positioning management system is an automatic identification information technology product integrating RFID identification technology, computer software and hardware, information collection and processing, and network data communication technologies. This product realizes the regional positioning monitoring of personnel through long-distance non-contact identification of electronic tags, and integrates computer network technology, communication technology, geographic information technology, embedded microprocessor and other technologies. Each person's specific location and movement route can be visually displayed through the control room's computer or display. All the data is stored in the database for a long time, and playback of each person's moving path can be performed. The local area network is connected to the Internet. Administrators can see this information on any computer that can log on the network.
Second system design ideas
The RFID-based plant area location management system involves computer software, databases, electronic circuits, power supplies, digital communications, and wireless identification technologies. Therefore, in the design of the program, in addition to considering its function, in the stability, reliability, anti-jamming capability, fault tolerance and exception protection should also be fully considered. The project plan utilizes high-speed Ethernet (if the customer already has an existing network and wants to use the existing network) plus the field bus system as the main transmission platform, and develops corresponding readers, antennas and other equipment to the system, through the reader. The personnel positioning management software and the main system perform background data exchange with a standard dedicated database to implement tracking and positioning of personnel.
2.1 System Design Principles
1) Implementing effective identification and detection of personnel in and out, is a management system that fully embodies “humanization, informatization, and high degree of automation†and realizes digital management
2) Provide management personnel with management information such as personnel entry and exit restrictions, personnel positioning, and inspection and monitoring
3) System design security, scalability, ease of maintenance and ease of operation
4) Easy networking, B/S structure, easy multi-regional network monitoring
2.2 Running Device Configuration Requirements
Reader uses 2,4G remote reader, technical indicators:
Readable/Writable Labels 2.4G electronic tags used by the company's personnel;
Operating frequency 2.4--2.45GHz;
Work mode Upload the read card number information actively;
Output power 27-35dBm (adjustable between 27-35dBm);
Reading distance 50--80m (up to 80m, need to configure another antenna);
Reading speed 100 sheets/second;
The security mechanism can verify the validity of electronic tags;
Card reading method Active receiving card signal;
One-time card reader with anti-collision detection function, one batch reading 100 sheets/second;
Communication interface TCP/IP;
Operating temperature -20 °C ~ +70 °C;
The number of antennas is 1;
Average power consumption ≤ 12W;
Power supply Power converter with 220V AC input +12V/1A DC output.
2.3 System Construction Target
Develop an RFID-based factory area personnel positioning and management system to conduct real-time tracking monitoring and positioning of incoming and outgoing personnel, and keep abreast of the position and trajectory of personnel.
2.4 System Features
1) RFID long-distance identification technology
The system uses RFID 2.4G long-distance technology to automatically identify personnel tag cards in a range of 50 meters.
2) Instant positioning
The entire system control flow and data flow do not need to round robin, multiple long-distance reading head data refreshes are calculated in milliseconds. In the long-range reader automatic recognition effective coverage, the upper computer software truly achieves “what you see is what you getâ€. Immediately read and upload personnel location information, there is no time delay, truly positioning time accurate to second.
3) Flexible rights management
Different authorities can log in to the system and perform different operations.
4) Information Sharing
The system center station and the network terminal can be networked and operated in a local area network manner, so that all terminals on the Internet can share information in multiple points within the scope of use rights, and multiple departments and leaders can simultaneously share monitoring information in different locations.
5) Dynamically display the position of the person on the map in real time, and the display style is rich and varied, and the image is intuitive
The people in different positions are represented on the map with different color figures. This looks very visual and intuitive, and indeed embodies the features of the geographic information system.
6) Monitoring Chart Static and Dynamic Editing
The static and dynamic editing of the monitoring page is open to the user, supports a variety of graphics formats, mouse and keyboard operations, and fully supports real-time multitasking. While the system is performing real-time data acquisition, the system can record, display, query, edit, and network communications.
7) Personnel distribution data automatically adjusts with the zoom of the map
When the map is reduced to a certain extent, only the total number of people in each area and each base station is displayed. After the map is enlarged to a certain extent, each person is displayed.
8) Two-way query of maps and personnel files
After you see a person in the map, you can see the person’s details (name, title, photo, etc.) on the person (a small picture of the person) with a light touch. You can also use the person’s name and card number. When he finds someone, and then automatically locates the person on the map, he learns where the person is.
Three system design
Figure 3 Schematic diagram of an RFID-based plant area location management system
The RFID-based personnel positioning management system is mainly composed of a data management platform part, a long distance reader, a long distance electronic tag card set, and a data transmission bus. When the person wearing the tag card enters the remote reader positioning area, the reader reads the data in the electronic tag, and the data processed by the reader is transmitted to the background control system. Through the data management platform, you can always know where this person wearing the electronic tag is at this moment. This system follows the “principle of unified issuance, unified equipment, and unified management†and the “one-person, one-card system†is based on personnel. The specific scheme is as follows:
1) According to the customer's needs, in each room that needs to be located, or in the center of an outdoor area that needs to be located (for example, on a pole, or on a building with a certain height above the ground), install one. Taiwanese readers, according to the corresponding position number to determine the area where the readers are located, use the switch as a network node in the entire control range, set up a local area network (this network can generally cover a few kilometers range), and through this The network connects the reader and its terminal equipment to the computer control center. The reader/writer collects the human coded signal in the area it controls, transmits it to the computer control center through the network, and finally stores the data in the database.
2) The customer issues electronic tags to relevant personnel, each person has an electronic tag. The electronic tag has a unique number. The system database number corresponds to the individual's name, age, gender, department, position, and entry time.
3) The customer takes effect immediately after authorizing the electronic tag card. The scope of authorization includes the area that the person is allowed to enter. To prevent people from entering the illegal area, the system sets the area and time limit for the card's admission and the failure or loss of the card.
4) When an electronic tag passes through a read/write range of a reader/writer, the reader/writer collects the information of the person wearing the tag (person's name, location, and time passed by the location), and transmits the information to the user via the network. The computer control center, if at a later time, other readers do not read the information of this electronic tag, we can judge the position range of the personnel. If he continues to move forward, we can read the position of the person from other readers and get his trajectory. Through reasonable layout of the reader, people can be tracked and positioned.
5) When the cardholder enters an illegal area, an alarm is issued at the control center, prompting the administrator to take appropriate measures.
6) The computer control center uses the GIS to display the position information collected by the reader on the map in real time, and realizes the two-way query of maps and personnel files. After seeing someone in the map, they can be on this person (representative staff). You can see the person’s details (name, title, photo, attendance, etc.), or find someone based on the person’s name, card number, etc., and then automatically locate the map on the map. This person, in order to understand the specific location of this person.
7) The system center station and the network terminal are networked and operated in a local area network manner. All terminals on the Internet realize the sharing of information in multiple points within the scope of use rights, and allow multiple departments and leaders to share monitoring information at different locations at the same time.
8) All data is stored in the database for a long period of time, and the personnel's name, department, etc. can be used to query the personnel's previous data information to implement the playback of the personnel path.