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1 Company profile
Suzhou Luhe Electronic Technology Co., Ltd. has wireless identification technology, wireless sensor technology, wireless transmission technology, and professionally provides activeRFID Products and Internet of Things transmission solutions, the company integrates scientific research and development, engineering design, product manufacturing, system integration and engineering services to provide customers with professional solutions.
As a provider of active RFID products, the company has built and implemented a number of successful projects in the fields of mine tunnels, smart parking lots, power temperature measurement, and video surveillance. From a people-oriented perspective, the company adheres to the starting point of changing lives with technology, creating a series of intelligent management systems that combine software and hardware to make people’s work and life more convenient, comfortable and efficient.
The company has a senior and excellent active RFID industry elite team with rich practical experience in product development, operation management, marketing and other fields. At present, the products have entered key RFID application markets such as surveillance, anti-counterfeiting, electricity, logistics and transportation.
2 Program overview
At present, the application of informatization system has gradually become popular in various large domestic factories. However, the existing information management system is often only the electronic management of various administrative, technical documents and work business flow processes, and cannot obtain the actual on-site information in real time. A comprehensive, timely and accurate grasp. Managers need to spend a lot of energy and time to patrol various areas. The inability to timely and accurately grasp the on-site situation indirectly led to the gradual expansion of many potential safety hazards and even accidents.
Therefore, with the current mature radio frequency identification technology, network transmission technology, and other surrounding information technology, the personnel distribution and safety management of the entire factory area and key areas are incorporated into the information management system, which is the modern factory information and safety management. inevitable choice.
2.1.1 General design principles
The plant personnel positioning statistical management information system is a comprehensive system that integrates personnel positioning management, personnel regional statistical management, and daily office. Therefore, the overall plan design must be reliable, safe, advanced, flexible, expandable, economical, and practical. The convenience of operation and maintenance requires a forward-looking construction of a unified management platform for the overall situation.
In the planning and design process, the system design aims at ensuring safe production, improving enterprise efficiency, and improving the quality of enterprise management, and takes high-quality service managers and users as the basic principles and design ideas.
2.1.2 Hardware design principles
The hardware design and selection of the system should follow the following principles:
1 Advancement: The system hardware should be advanced to avoid low performance or premature elimination of the entire system due to obsolete technology in the short term.
2 Reliability: While fully considering the advanced nature, the hardware system should be based on the specific needs of the user for the entire system, and should give priority to the selection of advanced, applicable and mature technologies to maximize the investment benefits.
3 Openness: The choice of computer network and related products should be based on advancement and applicability, while considering compatibility.
4 Scalability: The system data acquisition equipment adopts modular structure and bus communication mode. When the system scale is expanded, no major transformation is needed, and the corresponding modules can be added.
2.1.3 Software design principles
The software design and selection of the system should follow the following principles:
1 Reliability and safety: The system software should have high reliability and safety.
2 Ease of use: The system software should be easy to operate and adopt a Chinese graphical interface.
3 Standardization: The system software should comply with national, industry standards and international standards to facilitate multiple upgrades and support for new hardware products.
4 Scalability: The system software should be expandable. Adopting object-oriented structure design, it has certain flexibility, operability and expansibility. When the business changes in the future, the addition of modules and the modification of modules should not affect other modules.
In order to ensure the quality of the entire project, the overall plan design principles need to achieve the above-mentioned reliability, safety, advancement, flexible expansion, economy and practicality, and the convenience of operation and maintenance are highly unified.
2.2 Design specifications and standards
GB3836.1-2000 Electrical Equipment for Explosive Gas Atmosphere Part 1: General Requirements
GB3836.4-2000 Electrical Equipment for Explosive Gas Atmosphere Part 4: Intrinsically Safe “i”
GB4208-2008 Shell protection grade (IP code)
GB/T191-2008 Graphical signs for packaging, storage and transportation
GB/T 2423.1-2001 Environmental testing of electrical and electronic products Part 2: Test method Test A: Low temperature
GB/T 2423.2-2001 Environmental testing of electrical and electronic products Part 2: Test method Test B: High temperature
GB/T 2423.4-2008 Environmental testing of electrical and electronic products Part 2: Test method Test Db Alternating damp heat (12h+12h cycle)
GB/T 2423.5-1995 Environmental testing of electrical and electronic products Part 2: Test method Test Ea and guideline: Shock
GB/2423.8-1995 Environmental testing of electrical and electronic products Part 2: Test method Test Ed: Free fall
GB/T 2423.10-2008 Environmental testing of electric and electronic products Part 2: Test method Test Fc: Vibration (sinusoidal)
The generation of GB/T10111-2008 random number and its application in product quality sampling inspection
GB/T2829-2002 Periodic Inspection Attribute Sampling Procedure and Table (Applicable to the inspection of the stability of the production process)
GB/T 9969-2008 General Rules for the Use of Industrial Products
GB/T 2887-2000 General Specification for Computer Sites
3 System composition
3.1 System composition
The system is mainly composed of monitoring host, server, client computer, identification master station, personnel identification card, monitoring software, display unit, etc.
1 Computer room monitoring system
Including monitoring host, server, client computer, etc.;
2 Monitoring host
Carry out patrol, data collection and control of identification substations;
3 servers
Save real-time collection and identification of sub-station data information for real-time monitoring, report query and statistics;
4 Display unit
Install display systems in the computer room or public areas, such as large LED or LCD screens, to display current personnel and vehicle activities and distribution.
3.2 System Architecture
3.2.1 Overall system architecture
The system is a real-time operating system software that supports embedded system applications. It is an extremely important part of the embedded system. It usually includes the underlying hardware-related driver software, system kernel, device driver interface, communication protocol, and graphics. Interfaces, standardized browsers, etc., embedded operating systems have more prominent features in terms of system real-time efficiency, hardware dependency, software solidification, and application specificity.
3.2.2 Wiring method
According to requirements, the current system monitoring and identifying base stations are not many, and they are more centralized. Wired transmission can be used directly. Generally, for better system compatibility in the future, a combination of wired and wireless is recommended for system wiring.
3.2.3 System platform architecture
3.3 The working principle of the system
The following figure is a system structure diagram (the following is a wireless AP mode for data transmission; it can also be realized through a cable)
System structure diagram
3.3.1 Positioning statistics management:
Large-scale positioning: According to the actual needs of the factory, a certain number of positioning and identifying base stations are placed in the production area of the factory according to the specific conditions of the site. Under normal circumstances, a base station is placed every 50 meters to adjust the signal coverage of the monitoring area to identify the base station to the best state.
After the installation is confirmed, then install a personnel identification card for the personnel inside and outside the factory who need to track and locate. When the personnel enters the monitoring area, as long as the signal coverage of the base station is recognized in the factory area, the base station can sense the signal at any point at any time , And upload it to the information workstation. After software processing, specific information (such as: who is, where, at specific time, how many people are in a certain area) can be obtained, and it can be dynamically displayed (real-time) in the monitoring center On a big screen or computer, and make a backup. The personnel in the center of the plant’s computer room (or relevant management personnel) can keep abreast of the situation of the plant personnel.
At the same time, for some restricted or dangerous areas, after installing the activation source, when the person enters this small area with the identification card, the activation source will send the activation signal to the person identification card, as long as it is within the signal range of the identification base station , The recognition base station can recognize that the personnel card has entered the restricted or dangerous area at this time, and then feedback the information to the background, which is judged by the background processing. If the card is not authorized to enter, the system will have an alarm message, which is convenient The management personnel find out and deal with it in time. If the card is authorized, the location record will be performed normally. At this time, the location information will be displayed as the location of the activation source.
For the above information, the manager can also view a certain area according to the distribution diagram on the large screen or on the computer, and the computer will then count and display the personnel in this area. The manager can observe the real-time location of the workers in the factory in real time, and realize the positioning of the workers in the factory. In addition, once an accident occurs, the personnel at the accident site can be found immediately based on the personnel location distribution information in the computer, so as to help rescuers rescue the trapped people in an accurate and rapid manner.
3.4 System indicators and main equipment parameters
3.4.1 Main indicators of the system
• Maximum number of identification cards: more than 10,000
• Highest positioning accuracy: 2-5 meters
• Missing reading rate: 1 in 1,000
• Wired transmission rate: ≥5kbps
• The number of concurrent identification sub-stations is greater than 100
• Recognition substation effective receiving distance: the farthest recognition is 80 meters, the range is adjustable by software
• Maximum moving speed of the tested target: 15m/s
• Wireless operating frequency: 2.4GHz
• Transmission error rate: ≤10-6
3.4.2 Main equipment parameters
1 Identify the base station
• Wired transmission rate ≥10kbps
• Wireless working frequency 2.4GHz
• Modulation method GFSK
• Explosion-proof type intrinsically safe
• Working temperature -40℃-60℃
• Environmental humidity ≤95%
2 Personnel identification card
• Wireless transmission rate ≥256K
• Working frequency 2.4GHz
• Modulation method GFSK
• Working temperature -40℃-60℃
• Environmental humidity ≤95%
• Battery working time is more than 1 year
4 Main functions and features of the system
4.1 Positioning function
4.1.1 Real-time monitoring
Real-time monitoring of the distribution of personnel within the plant area by region. Real-time monitoring of the total number of personnel in the entire plant and real-time monitoring of the total number of personnel in key areas. The main monitoring area and special area map can be drawn according to the actual situation of the factory. The map is dynamic. With the movement of factory personnel, the number of people in each area shown in the map will be updated at any time. Click with the mouse to display a list of persons in a selected area; further clicks can also display the whereabouts of a selected person after entering the monitoring area.
4.1.2 Find the current location of a person
Enter the name or number of any person, you can immediately graphically display the area where the person is currently located; you can also enter multiple people at the same time, display the current location of each of these people in the factory area in text, and dynamically display their information on the map in real time whereabouts.
4.1.3 Statistics and query of personnel entering special areas
People in special areas can be inquired in real time as needed
4.1.4 Statistics function
It can accurately count the time when employees enter the factory and leave the factory, and can generate daily and monthly statistical reports according to shifts and departments.
4.1.5 Security management function
• Area overcrowded warning
Limit the number of personnel in a certain area, and give an alarm if it exceeds the number of personnel.
• Alarm for employees entering the restricted area
When a worker enters the restricted area, the system will alert the manager to take corresponding measures.
4.2 System equipment management
4.2.1 Identification card battery alarm
When the power of the identification card is too low, the system will warn in advance to notify the relevant technical personnel to replace the battery in time to avoid the identification card from working abnormally when the identification card is out of power.
4.2.2 The base station is not online alarm
When identifying the substation failure or the abnormal power supply of the substation, or identifying the signal line connection failure of the substation, the system will generate the base station offline alarm, which facilitates the timely discovery and resolution of the problem. After the problem is resolved, the alarm will automatically end and save the historical alarm information in the historical alarm.
4.3 System management function
The management software of the system can realize the distribution of multiple users with different permissions, so that each user can run the software on the network terminal at the same time, query the real-time situation of the factory area, and modify the software at different levels; the real-time data of the factory area can also be uploaded to the WEB server , Users can check the distribution of plant personnel in real time in the form of web pages through the Internet.
4.4 System characteristics
5.4.1 Low power consumption
The system uses 2.4GHZ chip, integrated circuit design, ultra-low power consumption, and a single battery can work continuously for more than one year.
5.4.2 Low Missing Read
Using unique data processing technology to accurately and quickly identify the card, it effectively solves the problem of co-frequency interference, and solves the problem of too many cards at the same time, and the data conflict of the card reader causes misreading and missed reading of the identification card. Accuracy and inaccurate personnel statistics.
5.4.3 Automatic diagnosis
With automatic diagnosis function, and display on the screen, automatic alarm.
5.4.4 The monitoring system is intuitive and convenient
Real-time display of the number and distribution of plant personnel, personnel information in the designated area of the plant, distribution of personnel in the designated department and plant area, and personnel information, and can query the travel trajectory of the designated personnel.
5.4.5 Comprehensive report query function
It can count the staff, the number of times of entry and exit, the length of work, and the number of work shifts in the whole district by time, department or shift, and provide a wealth of query and print output functions;
It can perform daily and monthly statistics on plant personnel, and provide rich query print output functions.
5.4.6 Convenient system management functions
The management software can assign multiple users with different permissions, so that each user can run the software on the network terminal at the same time, query the real-time situation of the factory area, and can operate the software at different levels.
5.4.7 Complete system warning system
Real-time display of identification card power alarms, power supply working status alarms, identification substation not online alarms, communication interface failure alarms, personnel entering the prohibited zone in violation of regulations, and area overcrowding alarms.
5.4.8 Superior expansion function
The system is an open design and can be easily connected with other systems, such as consumer systems, ERP systems, etc.
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