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1 Overview
By sticking or wearing RFID electronic tags on the front of the construction workers’ helmets, the identification and entry and exit management of the workers in the operation area of the construction site can be realized. With the on-site LED display, real-time on-site personnel information.
2. Demand analysis
The main application scenarios and requirements analysis are as follows:
Personnel entry and exit identification: When an operator enters the production area (entrance), he can self-identify the entry time, name, gender, and type of work of the person, and display the relevant information on the LED screen (the LED screen is installed at the entrance gate).
Personnel entry and exit identification in key areas: When an operator enters Building A, B, C, and D, it can automatically record the entry time and related information of the person.
Kanban display: The LED screen at the entrance and exit gate can reflect the number of people and the total number of workers in the production area in real time.
Record management: In the background system, it can reflect the number of people and related information of each job type in each area (ABCD) in real time.
3. Technical Solution
3.1. RFID electronic tag selection
Considering that all identification points need to accurately record the entry and exit of personnel, tri-frequency RFID electronic tags are used, and the appearance of the tags should be considered for easy sticking in the helmet.
3.2. System Networking
3.3. Analysis of the application mode of entrance and exit of gate personnel
The entry and exit of the gate personnel of the construction site is usually controlled by swiping the three-roller gate. After using the RFID automatic identification electronic tag, the three-roller gate is controlled according to whether it is necessary or not. There are two application modes, and the corresponding equipment is different.
Mode 1: Automatic reading, no control of three roller gates
This mode is the same as the identification of people entering and exiting at the entrance of the building. A calibration reader is installed inside and outside the three-roller gate, connected to the communication gateway, and automatically judges the entry and exit.
Three channels, using 4 calibration readers.
Mode 2: Automatically read and control three roller gates
In this mode, an RFID calibration reader for vehicles needs to be installed in each channel of the three-roll gate, connected to the access controller, and control the three-roll gate.
Three channels, using 6 calibration readers, with 3 double-door controllers.
3.4. RFID personnel location software platform
3.4.1. The logical structure of the software platform
The system software adopts a hierarchical and sub-module framework design. The presentation layer is exchanged with users for interface display, data entry, display, etc., the business logic layer is responsible for business process processing, and the data access layer provides a unified interface for data access. B/S three-tier structure, a multi-tier business software system based on WEB applications. The use of middleware technology to separate the central database and applications provides an easy-to-expandable business architecture, which can better and more rationally plan business and data flows, improve the security and reliability of the system, and have superior real-time data performance. Strong maintainability.
3.4.2. System function
The platform system functions are as follows:
System management: realize system configuration management, including authority management, role management, user management, etc.
Equipment management: realize configuration management and real-time status monitoring of all equipment
Regional management: Realize regional data, building data configuration and regional authority management, and can realize hierarchical and sub-authority management.
Personnel management: realize personnel information synchronization and personnel information management
Label management: realize label warehousing management, label and personnel binding, label loss report, card replacement and cancellation management, etc.
Entry/Exit/Track Management: Real-time monitoring of all entry and exit points, real-time entry and exit personnel data, personnel entry and exit statistical records, and personnel activity trajectories over a period of time.
Sensitive area management: set up a list of persons who can enter and exit sensitive areas, display information about personnel entering and exiting sensitive areas, and display alarm information about unauthorized entry and exit
3.4.3. Screenshot of the main system interface
Personnel trajectory
real time monitoring
3.5. Equipment list
3.6. Solution Products
3.6.1. Calibration reader
3.6.2. Active electronic tags
Model: ZCT311
Use 125k+2.45G dual-band electronic tags
Use high-strength shell material, waterproof, high temperature resistance, impact resistance
Strong anti-interference, adapt to complex application environment
Long reading distance, low power consumption, anti-collision, maintenance-free
3.6.3. Communication Gateway
Model: ZCM311
Efficient entry and exit judgment algorithm to accurately realize personnel entry and exit judgment
Large-capacity data storage, offline automatic data storage, online automatic upload
Multiple interfaces, supporting GPRS/3G/Ethernet data interface environment
Remote monitoring of equipment status
Built-in switching power supply, wall-mounted installation
Model: ZCM311
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