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1. Project background and significance
1.1 System background
Due to the large number of people in the factory, there are certain difficulties in management, and it is easy to produce management loopholes and cause unnecessary management problems. In addition, the factory itself is also a flammable and explosive zone, which is prone to danger, causing irreparable losses and consequences; in addition, The scale of the factory is large, and if problems occur due to the lack of personnel management, there is no way to hold them accountable. The perpetrators will have a fluke mentality. Failure to pay attention will cause the problem to become more serious and the factory system will be difficult to improve.
1.2 Project significance
From the perspective of actual personnel management problems in chemical plants, we have developed an RFID factory personnel management positioning system. This system focuses on solving the management problems of all employees in the factory, and realizes simple personnel regional positioning, which brings convenience to managers and can be solved at the same time. For many management problems in the factory, strict management of factory workers is carried out to reduce accidents, ensure the safety of workers, avoid economic losses caused by accidents to the factory, improve the reputation of the factory, and bring greater benefits to the factory.
2. System introduction
2.1 System introduction
This system uses wireless sensor network and RFID radio frequency identification technology, through the installation of RFID hardware and corresponding functional software, according to the actual situation of factory personnel management, a complete and efficient intelligent management system is developed.
2.2 System characteristics
(1) Advanced RFID equipment technology
The RFID electronic wristband technology can read data through external materials; it has a long service life and can work in harsh environments; the reading distance is longer; it can write and access data, and the writing time is fast; the content of the wristband can be dynamic Change; able to process multiple tags at the same time; the data access of the wristband is protected by a password, and the security is higher; the objects attached to the wristband can be tracked and located.
(2) The system has a high degree of maturity
It has the characteristics of low cost, low power consumption, stability and confidentiality, and can run independently without relying on other systems. Fully consider the reliability and security design of the network, host, operating system, database, etc.
(3) Good compatibility and scalability
It adopts advanced computer application technology and has good expandability. The open architecture and long-term life cycle can meet the needs of future development of new functions; the data obtained by the system through GPRS or serial port can be seamlessly connected with the system.
3. System introduction
3.1 System overview
1) Distribute a wristband label for each factory employee, store a unique ID number as the unique identification of the employee, and store simple information of the employee: name, title, contact information, department, etc.;
2) Install a directional analyzer at each door of the administrative building and production workshop (the number and location of the installation are determined according to the site conditions, so that the area that needs to be monitored does not have a blind area where the label information cannot be read), when there is a job to wear a label When a person enters a factory or room, the orientation analyzer immediately captures the wearing tag information, and transmits the signal to the system terminal through wireless transmission or other intermediate devices, and the worker enters that workshop.
3) Install an active fixed reader in the administrative building and the production workshop, (the number and location of the installation are determined according to the on-site situation, so that the area that needs to be monitored does not have a blind area where the label information cannot be read), and each person must When entering the staff with the tag, the card reader automatically reads the signal of the tag when passing through the workshop to identify the identity of the holder of the wristband tag; so as to locate the personnel in the area of the workshop.
4) Set access permissions for employee labels in different departments, which are divided into administrative employee wristband labels and workshop worker wristband labels. After setting permissions, employees can only enter the factory permitted by themselves. If they enter unauthorized areas without authorization, The card reader will automatically recognize it and an alarm will occur.
5) Install card readers in each program flow workshop, and set permissions as well. Workers in production process 1 workshop are not allowed to enter the workshop of process 2 workshop without authorization, otherwise the reader will alarm when entering.
6) Through the record of the card reader, the employee can be located in the area. For example, when employee A enters the administrative building, the card reader will read the employee tag, and the card reader will send the information to the upper computer to record the trace of the employee. The regional positioning of employees can be realized.
3.2 Function realization
3.2.1 Employee authority setting
1) Department authority
Distribute a wristband tag for each employee. The tag stores a unique ID number that can uniquely identify the employee. It can also store simple information about the employee: name, title, contact information, department, etc.; other detailed information is stored here The back-end database corresponding to the ID number is available for management personnel to query and access.
The interior of the factory is divided into administrative office buildings and production workshop areas. Orientation analyzers are installed at the entrances of the two working areas to read label information.
Because the wristband tag is active, it sends signals all the time. When every employee with a wristband tag enters his work area, the reader reads the content of the tag.
When the card reader reads the information, it sends the data to the upper computer of the system through the communication interface, and compares it with the employee’s information in the upper computer: if the employee’s information matches the information in the back-end database, it can be entered smoothly; If it does not belong to this working area, that is, the information does not match, then the card reader will give an alarm after reading this signal, telling the management staff that the employee does not belong to this working area and enters illegally, and corresponding measures can be taken.
2) Workshop procedure authority
In the factory workshop area, each production line is divided into different production processes. For example, production line 1 is divided into: process A, process B, …, process X, etc.
Also install a fixed card reader at the entrance of each process workshop to set the entry authority of the employees. For example, employees in the process A workshop are not allowed to enter the process B workshop without authorization
When an employee enters, the card reader reads the wristband information and sends the host computer to query the employee’s information and compare them. If the information matches, the employee can pass smoothly; if the reader reads the information does not match, the same happens The alarm prompts illegal entry and reminds relevant management personnel to take necessary measures.
3.2.2 Whole-process regional positioning
When each employee with an electronic wristband tag enters the workshop of their respective department, the card reader reads the wristband tag information, and the card reader sends the employee information to the upper computer at the control end through the communication interface, and the upper computer records the employee’s information The action trajectory can locate employees in the area. The monitoring personnel can query the location of a certain employee through the host computer. For example, when employee A enters the administrative building, the card reader will read the employee tag, and the card reader will send the information Go to the upper computer and record the trace of the employee. The monitoring personnel can query the area of the employee by inputting the unique identification number of the employee, and realize the regional positioning of the employee. The reading diagram is shown in the figure below:
3.2.3 Record attendance
When each employee holding an electronic tag enters the workshop of his own department, he self-swipe the card, the card reader reads the tag information, and sends the employee information and entry time to the upper computer of the control end, and the upper computer records the entry and exit records of the employee. The attendance record of employees can be recorded. Managers can query the attendance record of the employee by entering the employee number through the system host computer, which is convenient for summarizing. For example, when employee A enters the administrative building, the card reader will read the employee tag, and the card reader will The information is sent to the upper computer, and the monitoring personnel can query the attendance record of the employee A by entering the unique identification number of the employee A.
4. Product configuration
4.1 Electronic tag for temperature measurement wristband
The electronic tag of the temperature measurement wristband, together with the reading and writing equipment, can complete the identification of the person’s identity and the area. It can be widely used in public places such as enterprises, institutions, schools, nursing homes, hospitals, etc. Realize the management of personnel attendance, personnel tracking, and automatic entry and exit. The wristband is made of special materials and the design is simple, so any wearer will feel very comfortable. The product has the advantages of low power consumption, long service life and low average cost.
Product performance:
Working frequency: 2.4GHz-2.5GHz ISM microwave range
Recognition distance: 0-200m
Working current: less than 13mA
Power consumption: ultra-low power consumption, healthier and safer
Service life: 5 years
Safety performance: anti-lightning and anti-impact, meeting the requirements of industrial environment
Modulation method: GFSK
Quiescent current: less than 2μA
Working current: less than 15mA
Working humidity: less than 85%
Detection temperature: -40℃ ～ +85℃
Working temperature: -20℃ ～ +60℃
Anti-interference: 10V/m 0.1～1000MHz AM electromagnetic wave
Shell material: high temperature modified ABS plastic
Product color: various colors
Protection level: IP34 waterproof
Installation location: wrist
4.2 Comprehensive version of waterproof reader
The comprehensive version of the waterproof reader is based on the standard version by adding RJ45 network card. GPRS/GPS and other data transmission technologies, which greatly improves the performance of the product. Its main functional advantage is waterproof, lightning protection, and impact resistance, which can meet the industrial environment. Require. It supports the standard industrial-grade RS-232.RS-485 serial interface, the effective recognition distance can reach 120m, the maximum recognition speed can reach 200 km/h, and it can recognize 200 tags at the same time. Stable performance. Reliable work, strong signal transmission ability, long service life and other advantages.
Product performance:
Working frequency: 2.4GHz-2.5GHz ISM microwave range
Recognition distance: The effective recognition distance can reach 120m
Recognition speed: The maximum recognition speed can reach 200 km/h
Recognition ability: Recognize 200 labels at the same time
Recognition method: Omni-directional recognition. Directional recognition
Ambient temperature: at -40℃-85℃
Service life: 30 years
Anti-interference: Using channel isolation technology, multiple devices do not interfere with each other
Safety performance: Waterproof, lightning-proof and shock-proof, meeting the requirements of industrial environment
Communication interface: RS232/RS485/RJ45
Power supply: 9V/12V-3A DC power supply
Antenna polarization: vertical
Data rate: up to 10M bit/s
Dimensions: 15.5cm*14cm*5.5cm
Product weight: 1kg
Shell material: metal material
Product color: silver gray
Installation method: pasted or side-mounted
4.3 Orientation Analyzer
The orientation locator is an auxiliary reader. Orientation locators are mainly divided into entrance and exit management module (CY-SFMJC-201), full monitoring locator (CY-SFQJK-200), alarm locator (optional) (CY-SFZBJ-200), key monitoring area positioning (Optional (CY-SFZJQ-101). The main functions of each module are in order: accurately distinguishing entrances and exits, monitoring special personnel throughout the process, triggering alarms when approaching key areas, and realizing accurate identification and query of key rooms.
Product performance:
Working frequency: 2.4GHz-2.5GHz ISM microwave range
Recognition accuracy: 3-5M
Recognition ability: Recognize 200 labels at the same time
Recognition method: omni-directional recognition, directional recognition
Ambient temperature: at -40℃-85℃
Service life: 30 years
Anti-interference: Using channel isolation technology, multiple devices do not interfere with each other
Safety performance: Waterproof, lightning protection and impact protection, meeting the requirements of industrial environment
Communication interface: RS232/RS485/RJ45
Power supply: 9V/12V-3A DC power supply
Antenna polarization: vertical
Data rate: up to 10M bit/s
4.4 Data collector
The data collector is the most basic accessory product. The product has stable performance and can receive, store, forward, and amplify the received data signals, and manage the received data in a unified manner. The data collector is a supporting product during the use of the coordinator, which fully meets the need for data processing with a large amount of information.
The data collector has stable performance, reliable work, strong signal transfer and amplification capabilities. Its good performance, excellent appearance, and outstanding cost performance make it popular among similar products.
Product performance:
Ambient temperature: at -20℃-40℃
Humidity: 5%RH—95%RH (no condensation)
Service life: 30 years
Safety performance: lightning protection and impact protection, meeting the needs of industrial environments
Communication interface: AD/DC
Power supply: 220V
Data rate: up to 10M bit/s
Dimensions: 26cm*29.5cm*12cm
Product weight: 2kg
Shell material: metal material
Product color: silver white
5 concluding remarks
After the application of this system, it focuses on solving the management problems of all employees in the factory, realizing simple personnel regional positioning, bringing convenience to managers, and solving many management problems in the factory, strictly managing factory workers, and reducing the burden on managers. Reduce accidents, ensure the safety of workers, avoid economic losses to the factory due to accidents, improve the reputation of the factory, and bring greater benefits to the factory.
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